// controls.js - Zoom, rotate and toggle controls

import * as THREE from "three";
import { CONFIG, EARTH_CONFIG, ROTATION_MODE } from "./constants.js";
import { updateZoomDisplay, showStatusMessage } from "./ui.js";
import { toggleTerrain, setDayNightEnabled } from "./earth.js";
import { setCelestialDayNightEnabled } from "./celestial.js";
import {
  ensureTerrainReady,
  isTerrainReady,
  getTerrainOpacity,
  setTerrainOpacity,
} from "./terrain.js";
import {
  reloadData,
  clearLockedObject,
  clearLockedObjectAndInfo,
  setCablesEnabled,
  setSatellitesEnabled,
  getSatellitesEnabled,
} from "./main.js";
import {
  toggleTrails,
  getShowTrails,
  getSatelliteCount,
} from "./satellites.js";
import { getShowCables } from "./cables.js";
import { toggleBGP, getShowBGP, getBGPCount } from "./bgp.js";
import { ensureTVPanelReady } from "./tv.js";
import { createHUDPanel } from "./hud-panels.js";
import {
  ensureNewsPanelReady,
  updateNewsToggleUI,
} from "./news.js";
import { openSearchPanel } from "./search.js";
import {
  setButtonTooltip,
  setLayerButtonState,
  updateLayerButtonState,
} from "./layer-button-state.js";

export let autoRotate = true;
export let zoomLevel = 1.0;
export let showTerrain = false;
export let layoutExpanded = false;
export let rotationMode = ROTATION_MODE.ROTATE;
let dayNightEnabled = true;
let defaultEarthZoom = CONFIG.defaultViewZoom;
let activeCamera = null;

let earthObj = null;
let listeners = [];
let cleanupFns = [];
const HUD_PANEL_IDS = [
  "legend",
  "earth-stats",
  "media-panel",
  "layer-toggles",
];
const DRAGGABLE_PANEL_SELECTOR = ".hud-panel-draggable";
const PANEL_LAYOUT_ANIMATION_MS = 420;
const TOOLBAR_BASE_WIDTH_PX = 620;
const TOOLBAR_MIN_SCALE = 0.68;
const TOOLBAR_ORB_SIZE_PX = 46;
const TOOLBAR_HUB_SIZE_PX = 58;
const TOOLBAR_ORB_GAP_PX = 12;
const TOOLBAR_ARCH_SPAN_PX = 232;
const TOOLBAR_ARCH_RISE_PX = 40;
const TOOLBAR_SIDE_PADDING_PX = 12;
const TOOLBAR_BOTTOM_CLEARANCE_PX = 34;
const TOOLBAR_EXTRA_HEIGHT_PX = 34;
const HUD_EDGE_GAP_PX = 20;
const SETTINGS_MODAL_OPEN_ANIMATION_MS = 420;
const SETTINGS_MODAL_CLOSE_ANIMATION_MS = 320;
const SETTINGS_SHEET_MIN_SCALE = 0.06;
const SETTINGS_SHEET_MAX_SCALE_X = 0.22;
const SETTINGS_SHEET_MAX_SCALE_Y = 0.18;
const EARTH_SETTINGS_STORAGE_KEY = "planet.earth.settings.v1";
const DEFAULT_EARTH_ZOOM_STEP = 0.01;
let settingsModalTimer = null;
let settingsSheetAnimation = null;
let terrainToggleToken = 0;
let terrainPrefetchStarted = false;
let terrainPrefetchScheduled = false;
let focusViewAnimationToken = 0;
let earthSettingsDefaults = null;
let layerRegistry = new Map();
let layerPanelInitialized = false;

function compareLayerDefinitionsByStartupPriority(left, right) {
  const leftPriority = Number.isFinite(left?.startupPriority)
    ? left.startupPriority
    : Number.POSITIVE_INFINITY;
  const rightPriority = Number.isFinite(right?.startupPriority)
    ? right.startupPriority
    : Number.POSITIVE_INFINITY;

  if (leftPriority !== rightPriority) {
    return leftPriority - rightPriority;
  }

  return String(left?.id || "").localeCompare(String(right?.id || ""));
}

function getSortedLayerDefinitions({ includeUnprioritized = true } = {}) {
  return Array.from(layerRegistry.values())
    .filter((definition) =>
      includeUnprioritized
        ? true
        : Number.isFinite(definition?.startupPriority),
    )
    .sort(compareLayerDefinitionsByStartupPriority);
}

function shouldIncludeLayerInStartupLoad(definition) {
  if (!Number.isFinite(definition?.startupPriority)) {
    return false;
  }

  if (definition.startupMode === "preload") {
    return true;
  }

  return Boolean(definition?.getVisible?.());
}

function clampEarthZoomLevel(nextZoom) {
  const parsedZoom = Number.parseFloat(nextZoom);
  if (!Number.isFinite(parsedZoom)) {
    return CONFIG.defaultViewZoom;
  }
  return Math.min(CONFIG.maxZoom, Math.max(CONFIG.minZoom, parsedZoom));
}

function formatZoomPercent(zoom) {
  return `${Math.round(zoom * 100)}%`;
}

function getZoomResetTooltipText(zoom) {
  return `重置缩放到${formatZoomPercent(zoom)}`;
}

function getZoomResetStatusMessage(zoom) {
  return `缩放已重置到${formatZoomPercent(zoom)}`;
}

function canUseLocalStorage() {
  try {
    return typeof window !== "undefined" && !!window.localStorage;
  } catch {
    return false;
  }
}

function getCurrentSettingsSnapshot() {
  const panelVisibility = Object.fromEntries(
    HUD_PANEL_IDS.map((panelId) => {
      const panel = document.getElementById(panelId);
      const visible = !panel?.classList.contains("hud-panel-hidden");
      return [panelId, visible];
    }),
  );

  return {
    rotationMode,
    panelVisibility,
    layerVisibility: Object.fromEntries(
      getPersistedLayers().map((layer) => [layer.id, Boolean(layer.getVisible?.())]),
    ),
    terrainOpacity: getTerrainOpacity(),
    dayNightEnabled,
    defaultEarthZoom,
  };
}

function captureEarthSettingsDefaults() {
  if (!earthSettingsDefaults) {
    earthSettingsDefaults = getCurrentSettingsSnapshot();
  }
  return earthSettingsDefaults;
}

function cloneEarthSettings(settings) {
  return {
    rotationMode: settings.rotationMode,
    terrainOpacity: settings.terrainOpacity,
    dayNightEnabled: settings.dayNightEnabled,
    defaultEarthZoom: settings.defaultEarthZoom,
    panelVisibility: { ...(settings.panelVisibility || {}) },
    layerVisibility: { ...(settings.layerVisibility || {}) },
  };
}

function normalizeEarthSettings(rawSettings, defaults) {
  const normalizedPanelVisibility = { ...defaults.panelVisibility };
  const normalizedLayerVisibility = { ...defaults.layerVisibility };
  const inputPanelVisibility =
    rawSettings && typeof rawSettings.panelVisibility === "object"
      ? rawSettings.panelVisibility
      : {};
  const inputLayerVisibility =
    rawSettings && typeof rawSettings.layerVisibility === "object"
      ? rawSettings.layerVisibility
      : {};

  Object.entries(inputPanelVisibility).forEach(([panelId, visible]) => {
    if (panelId in normalizedPanelVisibility) {
      normalizedPanelVisibility[panelId] = Boolean(visible);
    }
  });

  Object.entries(inputLayerVisibility).forEach(([layerId, visible]) => {
    if (layerId in normalizedLayerVisibility) {
      normalizedLayerVisibility[layerId] = Boolean(visible);
    }
  });

  const nextRotationMode =
    rawSettings?.rotationMode === ROTATION_MODE.CRUISE
      ? ROTATION_MODE.CRUISE
      : defaults.rotationMode;
  const nextTerrainOpacity = Number.parseFloat(rawSettings?.terrainOpacity);
  const nextDayNightEnabled = typeof rawSettings?.dayNightEnabled === "boolean"
    ? rawSettings.dayNightEnabled
    : defaults.dayNightEnabled;
  const nextDefaultEarthZoom = clampEarthZoomLevel(
    rawSettings?.defaultEarthZoom ?? defaults.defaultEarthZoom,
  );

  return {
    rotationMode: nextRotationMode,
    panelVisibility: normalizedPanelVisibility,
    layerVisibility: normalizedLayerVisibility,
    terrainOpacity: Number.isFinite(nextTerrainOpacity)
      ? nextTerrainOpacity
      : defaults.terrainOpacity,
    dayNightEnabled: nextDayNightEnabled,
    defaultEarthZoom: nextDefaultEarthZoom,
  };
}

function getPersistedLayers() {
  return getSortedLayerDefinitions().filter((layer) => layer.persist !== false);
}

function getLayerDefinition(layerId) {
  return layerRegistry.get(layerId) || null;
}

function getLayerButton(layerId) {
  const definition = getLayerDefinition(layerId);
  if (!definition?.buttonId) return null;
  const button = document.getElementById(definition.buttonId);
  return button instanceof HTMLButtonElement ? button : null;
}

function loadEarthSettings() {
  const defaults = cloneEarthSettings(captureEarthSettingsDefaults());
  if (!canUseLocalStorage()) return defaults;

  try {
    const rawValue = window.localStorage.getItem(EARTH_SETTINGS_STORAGE_KEY);
    if (!rawValue) return defaults;
    const parsedValue = JSON.parse(rawValue);
    return normalizeEarthSettings(parsedValue, defaults);
  } catch (error) {
    console.warn("读取 Earth 设置失败，已回退默认值:", error);
    return defaults;
  }
}

function persistEarthSettings() {
  if (!canUseLocalStorage()) return;
  try {
    window.localStorage.setItem(
      EARTH_SETTINGS_STORAGE_KEY,
      JSON.stringify(getCurrentSettingsSnapshot()),
    );
  } catch (error) {
    console.warn("保存 Earth 设置失败:", error);
  }
}

function syncDefaultEarthZoomUi(nextZoom) {
  const slider = document.getElementById("default-earth-size-slider");
  const value = document.getElementById("default-earth-size-value");
  const zoomValue = document.getElementById("zoom-value");
  const tooltipText = getZoomResetTooltipText(nextZoom);

  if (slider instanceof HTMLInputElement) {
    slider.min = CONFIG.minZoom.toString();
    slider.max = CONFIG.maxZoom.toString();
    slider.step = DEFAULT_EARTH_ZOOM_STEP.toString();
    slider.value = nextZoom.toFixed(2);
  }
  if (value) {
    value.textContent = formatZoomPercent(nextZoom);
  }
  if (zoomValue instanceof HTMLElement) {
    zoomValue.title = tooltipText;
    const tooltip = zoomValue.querySelector(".tooltip");
    if (tooltip) {
      tooltip.textContent = tooltipText;
    }
  }
}

function setDefaultEarthZoom(nextZoom, { persist = true, applyToCurrentView = true } = {}) {
  defaultEarthZoom = clampEarthZoomLevel(nextZoom);
  syncDefaultEarthZoomUi(defaultEarthZoom);

  if (applyToCurrentView && activeCamera) {
    zoomLevel = defaultEarthZoom;
    applyZoom(activeCamera);
  }

  if (persist) {
    persistEarthSettings();
  }

  return defaultEarthZoom;
}

async function applyEarthSettings(settings) {
  if (!settings) return;

  HUD_PANEL_IDS.forEach((panelId) => {
    const visible = settings.panelVisibility?.[panelId];
    if (typeof visible === "boolean") {
      setHudPanelVisibility(panelId, visible, { persist: false });
    }
  });

  const appliedOpacity = setTerrainOpacity(settings.terrainOpacity);
  const terrainOpacitySlider = document.getElementById("terrain-opacity-slider");
  const terrainOpacityValue = document.getElementById("terrain-opacity-value");
  if (terrainOpacitySlider instanceof HTMLInputElement) {
    terrainOpacitySlider.value = appliedOpacity.toFixed(2);
  }
  if (terrainOpacityValue) {
    terrainOpacityValue.textContent = `${Math.round(appliedOpacity * 100)}%`;
  }

  setRotationMode(settings.rotationMode, { persist: false, suppressStatus: true });

  if (typeof settings.dayNightEnabled === "boolean") {
    applyDayNightEnabled(settings.dayNightEnabled, { persist: false });
  }

  setDefaultEarthZoom(settings.defaultEarthZoom, {
    persist: false,
    applyToCurrentView: true,
  });

  await applyLayerVisibilitySettings(settings.layerVisibility, {
    persist: false,
    silent: true,
  });
}

function resetEarthSettings() {
  const defaults = cloneEarthSettings(captureEarthSettingsDefaults());
  if (canUseLocalStorage()) {
    try {
      window.localStorage.removeItem(EARTH_SETTINGS_STORAGE_KEY);
    } catch (error) {
      console.warn("移除 Earth 设置失败:", error);
    }
  }
  void applyEarthSettings(defaults).then(() => {
    showStatusMessage("Earth 设置已重置", "info");
  });
}

async function setTerrainEnabled(button, enabled, { persist = true, silent = false } = {}) {
  const toggleToken = ++terrainToggleToken;

  if (!enabled) {
    applyTerrainUiState(button, false);
    if (persist) persistEarthSettings();
    if (!silent) {
      showStatusMessage("地形已隐藏", "info");
    }
    return false;
  }

  try {
    if (!isTerrainReady()) {
      setLayerButtonState(button, {
        loading: true,
        tooltip: "地形加载中...",
        statusText: "加载中",
      });
      if (!silent) {
        showStatusMessage("正在加载真实地形数据...", "info");
      }
      await ensureTerrainReady();
    }
    if (toggleToken !== terrainToggleToken) return showTerrain;

    applyTerrainUiState(button, true);
    if (persist) persistEarthSettings();
    if (!silent) {
      showStatusMessage("真实地形已显示", "success");
    }
    return true;
  } catch (error) {
    console.error("加载真实地形失败:", error);
    applyTerrainUiState(button, false);
    if (persist) persistEarthSettings();
    if (!silent) {
      showStatusMessage("真实地形暂时不可用", "error");
    }
    return false;
  }
}

async function setSatellitesLayerEnabled(button, enabled, { persist = true, silent = false } = {}) {
  clearSelectionIfHiding(!enabled);
  try {
    if (enabled) {
      setLayerButtonState(button, {
        active: false,
        loading: true,
        tooltip: "卫星加载中...",
      });
    }
    await setSatellitesEnabled(enabled, { suppressStatus: silent, suppressLoadingUi: silent });
    if (!enabled && !silent) {
      showStatusMessage("卫星已隐藏", "info");
    } else if (enabled) {
      const satelliteCountEl = document.getElementById("satellite-count");
      if (satelliteCountEl) {
        satelliteCountEl.textContent = `${getSatelliteCount()} 颗`;
      }
    }
    if (persist) persistEarthSettings();
    return enabled;
  } catch (error) {
    console.error("切换卫星显示失败:", error);
    setLayerButtonState(button, {
      active: false,
      loading: false,
      tooltip: "显示卫星",
    });
    if (persist) persistEarthSettings();
    return false;
  }
}

function setBGPLayerEnabled(button, enabled, { persist = true, silent = false } = {}) {
  clearSelectionIfHiding(!enabled);
  toggleBGP(enabled);
  if (!enabled && rotationMode === ROTATION_MODE.CRUISE && autoRotate) {
    setAutoRotate(false);
  }
  setLayerButtonState(button, {
    active: enabled,
    tooltip: enabled ? "隐藏BGP观测" : "显示BGP观测",
  });
  const bgpCountEl = document.getElementById("bgp-anomaly-count");
  if (bgpCountEl) {
    bgpCountEl.textContent = `${getBGPCount()} 条`;
  }
  if (persist) persistEarthSettings();
  if (!silent) {
    showStatusMessage(enabled ? "BGP观测已显示" : "BGP观测已隐藏", "info");
  }
  return enabled;
}

function setTrailsLayerEnabled(button, enabled, { persist = true, silent = false } = {}) {
  toggleTrails(enabled);
  setLayerButtonState(button, {
    active: enabled,
    tooltip: enabled ? "隐藏轨迹" : "显示轨迹",
  });
  if (persist) persistEarthSettings();
  if (!silent) {
    showStatusMessage(enabled ? "轨迹已显示" : "轨迹已隐藏", "info");
  }
  return enabled;
}

async function setCablesLayerEnabled(button, enabled, { persist = true, silent = false } = {}) {
  clearSelectionIfHiding(!enabled);
  try {
    await setCablesEnabled(enabled, { suppressStatus: silent, suppressLoadingUi: silent });
    if (persist) persistEarthSettings();
    return enabled;
  } catch (error) {
    console.error("切换线缆显示失败:", error);
    if (persist) persistEarthSettings();
    return getShowCables();
  }
}

async function applyLayerVisibilitySettings(layerVisibility = {}, options = {}) {
  for (const layer of getPersistedLayers()) {
    const nextVisible = layerVisibility?.[layer.id];
    if (typeof nextVisible !== "boolean") continue;
    await layer.setVisible(nextVisible, options);
  }
}

function getBuiltinLayerDefinitions() {
  return [
    {
      id: "terrain",
      buttonId: "toggle-terrain",
      icon: "landscape",
      label: "地形",
      meta: "Terrain",
      keywords: "地形 terrain",
      defaultActive: false,
      startupPriority: null,
      startupMode: "visible",
      startupLabel: "地形",
      startupMessage: "正在渲染地形...",
      statusTarget: "terrain-status",
      getVisible: () => showTerrain,
      setVisible: (visible, options = {}) =>
        setTerrainEnabled(getLayerButton("terrain"), visible, options),
    },
    {
      id: "satellites",
      buttonId: "toggle-satellites",
      icon: "satellite_alt",
      label: "卫星",
      meta: "Satellites",
      keywords: "卫星 satellites",
      defaultActive: false,
      startupPriority: 30,
      startupMode: "visible",
      startupLabel: "卫星",
      startupMessage: "正在加载卫星...",
      getVisible: () => getSatellitesEnabled(),
      setVisible: (visible, options = {}) =>
        setSatellitesLayerEnabled(getLayerButton("satellites"), visible, options),
    },
    {
      id: "trails",
      buttonId: "toggle-trails",
      icon: "timeline",
      label: "轨迹",
      meta: "Trails",
      keywords: "轨迹 trails",
      defaultActive: true,
      startupPriority: null,
      startupMode: "visible",
      startupLabel: "轨迹",
      startupMessage: "",
      getVisible: () => getShowTrails(),
      setVisible: (visible, options = {}) =>
        setTrailsLayerEnabled(getLayerButton("trails"), visible, options),
    },
    {
      id: "cables",
      buttonId: "toggle-cables",
      icon: "cable",
      label: "海缆",
      meta: "Subsea Cables",
      keywords: "海缆 subsea cables",
      defaultActive: true,
      startupPriority: 20,
      startupMode: "visible",
      startupLabel: "海缆",
      startupMessage: {
        prepare: "正在加载登陆点...",
        load: "正在加载海缆...",
      },
      getVisible: () => getShowCables(),
      setVisible: (visible, options = {}) =>
        setCablesLayerEnabled(getLayerButton("cables"), visible, options),
    },
    {
      id: "bgp",
      buttonId: "toggle-bgp",
      icon: "hub",
      label: "BGP观测",
      meta: "Routing Signals",
      keywords: "bgp观测 routing signals",
      defaultActive: true,
      startupPriority: 40,
      startupMode: "preload",
      startupLabel: "BGP态势",
      startupMessage: "正在加载BGP态势...",
      getVisible: () => getShowBGP(),
      setVisible: (visible, options = {}) =>
        setBGPLayerEnabled(getLayerButton("bgp"), visible, options),
    },
  ];
}

function syncLayerRowDefinition(definition, { appendIfMissing = false } = {}) {
  const list = document.getElementById("layer-panel-list");
  let row = definition.buttonId
    ? document.getElementById(definition.buttonId)?.closest(".layer-row")
    : null;

  if (!row && appendIfMissing && list) {
    row = createLayerRow(definition);
    list.appendChild(row);
  }

  if (!row) return null;

  row.dataset.layerId = definition.id;
  row.dataset.layerName = (definition.keywords || `${definition.label} ${definition.meta || ""}`)
    .trim()
    .toLowerCase();

  const icon = row.querySelector(".layer-row-icon");
  const label = row.querySelector(".layer-row-label");
  const meta = row.querySelector(".layer-row-meta");
  const button = row.querySelector("button");

  if (icon) icon.textContent = definition.icon;
  if (label) label.textContent = definition.label;

  if (definition.meta) {
    if (meta) {
      meta.textContent = definition.meta;
    } else {
      const copy = row.querySelector(".layer-row-copy");
      if (copy) {
        const metaEl = document.createElement("span");
        metaEl.className = "layer-row-meta";
        metaEl.textContent = definition.meta;
        copy.appendChild(metaEl);
      }
    }
  } else if (meta) {
    meta.remove();
  }

  if (button instanceof HTMLButtonElement) {
    button.id = definition.buttonId;
    button.title = `切换${definition.label}显示`;
    if (definition.statusTarget) {
      button.dataset.statusTarget = definition.statusTarget;
    } else {
      delete button.dataset.statusTarget;
    }
  }

  return row;
}

function registerLayerDefinition(definition, options = {}) {
  const normalizedDefinition = {
    persist: true,
    startupPriority: null,
    startupMode: "visible",
    startupLabel: "",
    startupMessage: "",
    ...definition,
  };
  layerRegistry.set(normalizedDefinition.id, normalizedDefinition);
  const row = syncLayerRowDefinition(normalizedDefinition, options);
  if (row && layerPanelInitialized) {
    bindLayerButton(row, normalizedDefinition);
  }
  return normalizedDefinition;
}

function initializeLayerRegistry() {
  layerRegistry = new Map();
  getBuiltinLayerDefinitions().forEach((definition) => {
    registerLayerDefinition(definition);
  });
}

function getViewRotation(targetLat, targetRotLon) {
  const latRot = (targetLat * Math.PI) / 180;
  return {
    x: EARTH_CONFIG.tiltRad + latRot * EARTH_CONFIG.latCoefficient,
    y: -((targetRotLon * Math.PI) / 180),
  };
}

function dispatchRotationModeChange() {
  window.dispatchEvent(
    new CustomEvent("earth:rotation-mode-change", {
      detail: {
        mode: rotationMode,
        active: autoRotate,
      },
    }),
  );
}

function applyTerrainUiState(button, enabled) {
  showTerrain = enabled;
  toggleTerrain(enabled);
  setLayerButtonState(button, {
    active: enabled,
    loading: false,
    tooltip: enabled ? "隐藏地形" : "显示地形",
    statusText: enabled ? "开启" : "关闭",
  });
}

function prewarmTerrainIfNeeded() {
  if (terrainPrefetchStarted || isTerrainReady()) return;
  terrainPrefetchStarted = true;
  ensureTerrainReady().catch((error) => {
    terrainPrefetchStarted = false;
    console.warn("地形预热加载失败:", error);
  });
}

function scheduleTerrainPrefetch() {
  if (terrainPrefetchScheduled || terrainPrefetchStarted || isTerrainReady()) {
    return;
  }
  terrainPrefetchScheduled = true;

  const runPrefetch = () => {
    terrainPrefetchScheduled = false;
    prewarmTerrainIfNeeded();
  };

  if (typeof window !== "undefined" && "requestIdleCallback" in window) {
    window.requestIdleCallback(runPrefetch, { timeout: 2200 });
    return;
  }

  window.setTimeout(runPrefetch, 1400);
}

export function applyImmediateView(targetEarthObj, camera, options = {}) {
  if (!targetEarthObj) return;

  const {
    lat = EARTH_CONFIG.chinaLat,
    rotLon = EARTH_CONFIG.chinaRotLon,
    zoom = getDefaultEarthZoomLevel(),
  } = options;
  const nextRotation = getViewRotation(lat, rotLon);

  targetEarthObj.rotation.x = nextRotation.x;
  targetEarthObj.rotation.y = nextRotation.y;
  zoomLevel = zoom;

  if (camera) {
    camera.position.z = CONFIG.defaultCameraZ / zoomLevel;
    updateZoomDisplay(zoomLevel, camera.position.z.toFixed(0));
  }
}

function cancelSettingsSheetAnimation() {
  if (settingsSheetAnimation) {
    settingsSheetAnimation.cancel();
    settingsSheetAnimation = null;
  }
}

function getSettingsSheetAnimationState(trigger, sheet) {
  if (!(trigger instanceof HTMLElement) || !(sheet instanceof HTMLElement)) {
    return null;
  }

  const triggerRect = trigger.getBoundingClientRect();
  const sheetRect = sheet.getBoundingClientRect();
  const triggerCenterX = triggerRect.left + triggerRect.width / 2;
  const triggerCenterY = triggerRect.top + triggerRect.height / 2;
  const sheetCenterX = sheetRect.left + sheetRect.width / 2;
  const sheetCenterY = sheetRect.top + sheetRect.height / 2;

  return {
    translateX: triggerCenterX - sheetCenterX,
    translateY: triggerCenterY - sheetCenterY,
    scaleX: Math.max(
      SETTINGS_SHEET_MIN_SCALE,
      Math.min(
        SETTINGS_SHEET_MAX_SCALE_X,
        triggerRect.width / Math.max(sheetRect.width, 1),
      ),
    ),
    scaleY: Math.max(
      SETTINGS_SHEET_MIN_SCALE,
      Math.min(
        SETTINGS_SHEET_MAX_SCALE_Y,
        triggerRect.height / Math.max(sheetRect.height, 1),
      ),
    ),
    radius: `${Math.max(triggerRect.width, triggerRect.height).toFixed(2)}px`,
  };
}

function animateSettingsSheet(sheet, trigger, opening) {
  const animationState = getSettingsSheetAnimationState(trigger, sheet);
  if (!animationState || typeof sheet.animate !== "function") {
    return;
  }

  cancelSettingsSheetAnimation();

  const fromTransform = `translate(${animationState.translateX.toFixed(2)}px, ${animationState.translateY.toFixed(2)}px) scale(${animationState.scaleX.toFixed(4)}, ${animationState.scaleY.toFixed(4)})`;
  const toTransform = "translate(0px, 0px) scale(1, 1)";
  const keyframes = opening
    ? [
        {
          transform: fromTransform,
          opacity: 0.22,
          filter: "blur(10px)",
          borderRadius: animationState.radius,
        },
        {
          transform: "translate(0px, 0px) scale(1.015, 1.015)",
          opacity: 1,
          filter: "blur(0px)",
          borderRadius: "0px",
          offset: 0.76,
        },
        {
          transform: toTransform,
          opacity: 1,
          filter: "blur(0px)",
          borderRadius: "0px",
        },
      ]
    : [
        {
          transform: toTransform,
          opacity: 1,
          filter: "blur(0px)",
          borderRadius: "0px",
        },
        {
          transform: fromTransform,
          opacity: 0.08,
          filter: "blur(10px)",
          borderRadius: animationState.radius,
        },
      ];

  settingsSheetAnimation = sheet.animate(keyframes, {
    duration: opening
      ? SETTINGS_MODAL_OPEN_ANIMATION_MS
      : SETTINGS_MODAL_CLOSE_ANIMATION_MS,
    easing: opening
      ? "cubic-bezier(0.16, 1, 0.3, 1)"
      : "cubic-bezier(0.4, 0, 0.2, 1)",
    fill: "both",
  });

  settingsSheetAnimation.onfinish = () => {
    sheet.style.transform = "";
    sheet.style.opacity = "";
    sheet.style.filter = "";
    sheet.style.borderRadius = "";
    settingsSheetAnimation = null;
  };
  settingsSheetAnimation.oncancel = () => {
    settingsSheetAnimation = null;
  };
}

function getFloatingGroups() {
  return [
    document.getElementById("zoom-control-group"),
  ].filter(Boolean);
}

function isFloatingMenuVisible() {
  return getFloatingGroups().some((group) => {
    return (
      group.classList.contains("open") ||
      group.matches(":hover") ||
      group.matches(":focus-within")
    );
  });
}

function isSettingsModalOpen() {
  return document
    .getElementById("settings-modal")
    ?.classList.contains("is-open");
}

function closeFloatingMenus() {
  getFloatingGroups().forEach((group) => {
    group.classList.remove("open");
    group.classList.add("force-closed");
  });

  if (document.activeElement instanceof HTMLElement) {
    document.activeElement.blur();
  }
}

function openSettingsModal() {
  const modal = document.getElementById("settings-modal");
  const trigger = document.getElementById("settings-trigger");
  const sheet = modal?.querySelector(".earth-settings-sheet");
  if (!modal) return;
  if (settingsModalTimer) {
    clearTimeout(settingsModalTimer);
    settingsModalTimer = null;
  }
  closeFloatingMenus();
  cancelSettingsSheetAnimation();
  modal.classList.remove("is-closing");
  modal.classList.add("is-opening");
  modal.classList.add("is-open");
  modal.setAttribute("aria-hidden", "false");

  requestAnimationFrame(() => {
    if (sheet instanceof HTMLElement) {
      animateSettingsSheet(sheet, trigger, true);
    }
    window.setTimeout(() => {
      modal.classList.remove("is-opening");
    }, SETTINGS_MODAL_OPEN_ANIMATION_MS);
  });
}

function closeSettingsModal() {
  const modal = document.getElementById("settings-modal");
  const trigger = document.getElementById("settings-trigger");
  const sheet = modal?.querySelector(".earth-settings-sheet");
  if (!modal) return;
  cancelSettingsSheetAnimation();
  modal.classList.remove("is-open");
  modal.classList.add("is-closing");
  if (sheet instanceof HTMLElement) {
    animateSettingsSheet(sheet, trigger, false);
  }
  if (settingsModalTimer) {
    clearTimeout(settingsModalTimer);
  }
  settingsModalTimer = window.setTimeout(() => {
    modal.classList.remove("is-closing", "is-opening");
    modal.setAttribute("aria-hidden", "true");
    settingsModalTimer = null;
  }, SETTINGS_MODAL_CLOSE_ANIMATION_MS);
}

function setHudPanelVisibility(panelId, visible, { persist = true } = {}) {
  const panel = document.getElementById(panelId);
  if (!panel) return;
  panel.classList.toggle("hud-panel-hidden", !visible);
  syncSettingsToggle(panelId, visible);
  if (panelId === "media-panel") {
    updateTVToggleUI(visible);
    updateNewsToggleUI(visible);
    if (visible) {
      ensureTVPanelReady().catch((error) => {
        console.error("初始化电视直播面板失败:", error);
      });
    }
  }
  if (persist) {
    persistEarthSettings();
  }
}

function syncSettingsToggle(panelId, visible) {
  const input = document.querySelector(
    `[data-settings-panel="${panelId}"]`,
  );
  if (input instanceof HTMLInputElement) {
    input.checked = visible;
  }
}

function syncAllHudPanelToggles() {
  HUD_PANEL_IDS.forEach((panelId) => {
    const panel = document.getElementById(panelId);
    syncSettingsToggle(panelId, !panel?.classList.contains("hud-panel-hidden"));
  });
}

function syncDayNightToggle(enabled) {
  const input = document.getElementById("toggle-daynight");
  if (input instanceof HTMLInputElement) {
    input.checked = enabled;
  }
}

function applyDayNightEnabled(enabled, { persist = true } = {}) {
  dayNightEnabled = enabled;
  setDayNightEnabled(enabled);
  setCelestialDayNightEnabled(enabled);
  syncDayNightToggle(enabled);
  if (persist) persistEarthSettings();
}

function setupSettingsControls() {
  const settingsTrigger = document.getElementById("settings-trigger");
  const settingsClose = document.getElementById("settings-close");
  const settingsBackdrop = document.getElementById("settings-backdrop");
  const settingsModal = document.getElementById("settings-modal");
  const settingsReset = document.getElementById("settings-reset");

  bindListener(settingsTrigger, "click", () => {
    openSettingsModal();
  });

  bindListener(settingsClose, "click", () => {
    closeSettingsModal();
  });

  bindListener(settingsBackdrop, "click", () => {
    closeSettingsModal();
  });

  bindListener(settingsReset, "click", () => {
    resetEarthSettings();
  });

  bindListener(settingsModal, "click", (event) => {
    const sheet = event.target.closest(".earth-settings-sheet");
    if (!sheet) {
      closeSettingsModal();
    }
  });

  const toggleInputs = document.querySelectorAll("[data-settings-panel]");
  toggleInputs.forEach((input) => {
    bindListener(input, "change", (event) => {
      const target = event.currentTarget;
      if (!(target instanceof HTMLInputElement)) return;
      const panelId = target.dataset.settingsPanel;
      if (!panelId) return;
      setHudPanelVisibility(panelId, target.checked);
    });
  });

  const terrainOpacitySlider = document.getElementById("terrain-opacity-slider");
  const terrainOpacityValue = document.getElementById("terrain-opacity-value");
  const defaultEarthSizeSlider = document.getElementById("default-earth-size-slider");
  const rotationModeButtons = document.querySelectorAll("[data-rotation-mode]");
  const syncTerrainOpacityUi = (nextOpacity) => {
    const safeOpacity = Math.round(nextOpacity * 100);
    if (terrainOpacitySlider instanceof HTMLInputElement) {
      terrainOpacitySlider.value = nextOpacity.toFixed(2);
    }
    if (terrainOpacityValue) {
      terrainOpacityValue.textContent = `${safeOpacity}%`;
    }
  };

  syncTerrainOpacityUi(getTerrainOpacity());
  syncDefaultEarthZoomUi(defaultEarthZoom);

  if (terrainOpacitySlider instanceof HTMLInputElement) {
    bindListener(terrainOpacitySlider, "input", (event) => {
      const target = event.currentTarget;
      if (!(target instanceof HTMLInputElement)) return;
      const nextOpacity = Number.parseFloat(target.value);
      const appliedOpacity = setTerrainOpacity(
        Number.isFinite(nextOpacity) ? nextOpacity : getTerrainOpacity(),
      );
      syncTerrainOpacityUi(appliedOpacity);
      persistEarthSettings();
    });
  }

  if (defaultEarthSizeSlider instanceof HTMLInputElement) {
    bindListener(defaultEarthSizeSlider, "input", (event) => {
      const target = event.currentTarget;
      if (!(target instanceof HTMLInputElement)) return;
      const nextZoom = Number.parseFloat(target.value);
      setDefaultEarthZoom(
        Number.isFinite(nextZoom) ? nextZoom : defaultEarthZoom,
        { persist: true, applyToCurrentView: true },
      );
    });
  }

  rotationModeButtons.forEach((button) => {
    bindListener(button, "click", (event) => {
      const target = event.currentTarget;
      if (!(target instanceof HTMLButtonElement)) return;
      const nextMode = target.dataset.rotationMode;
      if (!nextMode) return;
      setRotationMode(nextMode);
    });
  });

  const dayNightToggle = document.getElementById("toggle-daynight");
  if (dayNightToggle instanceof HTMLInputElement) {
    bindListener(dayNightToggle, "change", () => {
      applyDayNightEnabled(dayNightToggle.checked);
    });
  }

  captureEarthSettingsDefaults();
  applyEarthSettings(loadEarthSettings());
  syncAllHudPanelToggles();
  syncRotationModeButtons();
  syncDayNightToggle(dayNightEnabled);
}

function setupHudPanelControls() {
  const closeButtons = document.querySelectorAll("[data-close-panel]");
  closeButtons.forEach((button) => {
    bindListener(button, "click", (event) => {
      event.stopPropagation();
      const target = event.currentTarget;
      if (!(target instanceof HTMLElement)) return;
      const panelId = target.dataset.closePanel;
      if (!panelId) return;
      setHudPanelVisibility(panelId, false);
    });
  });
}

function capturePanelAnchor(app, panel, desiredLeft, desiredTop) {
  // 拖拽期间：按用户给出的绝对位置重置 anchor，轴模式回到 left/top。
  // clamp 真的触发时由 syncPanelAnchorFromClamp 改写成 right/bottom 模式。
  panel.dataset.anchorXSide = "left";
  panel.dataset.anchorX = String(desiredLeft);
  panel.dataset.anchorYSide = "top";
  panel.dataset.anchorY = String(desiredTop);
}

function getHudScaleValue() {
  const rawScale = getComputedStyle(document.documentElement)
    .getPropertyValue("--hud-scale")
    .trim();
  const parsedScale = Number.parseFloat(rawScale);
  return Number.isFinite(parsedScale) && parsedScale > 0 ? parsedScale : 1;
}

function getPreferredHudEdgeGap() {
  return HUD_EDGE_GAP_PX * getHudScaleValue();
}

function syncDraggedPanelSize(panel) {
  const dragWidthBase = Number.parseFloat(panel.dataset.dragWidthBase ?? "");
  if (!Number.isFinite(dragWidthBase)) return;
  const nextWidth = dragWidthBase * getHudScaleValue();
  panel.style.width = `${nextWidth}px`;
}

function syncPanelAnchorFromClamp(
  app,
  panel,
  desiredLeft,
  desiredTop,
  clampedLeft,
  clampedTop,
) {
  const appRect = app.getBoundingClientRect();
  const panelRect = panel.getBoundingClientRect();
  // 只在 clamp 真的改了坐标时切换贴边方向：
  //   clamp 把 left 往小推 → 右边/下方的边碰到 panel 了 → 切到 right/bottom 模式。
  //   这里保存的是“恢复时应回到的默认边距”，不是 shrink 期间瞬时的 0 间距。
  //   clamp 把 left 往大推 → 左边/上方的边（含 brand L 区）碰到 panel 了 → 记到 left/top 模式。
  const preferredGap = getPreferredHudEdgeGap();
  if (clampedLeft < desiredLeft) {
    panel.dataset.anchorXSide = "right";
    panel.dataset.anchorX = String(preferredGap);
  } else if (clampedLeft > desiredLeft) {
    panel.dataset.anchorXSide = "left";
    panel.dataset.anchorX = String(clampedLeft <= 0 ? preferredGap : clampedLeft);
  }
  if (clampedTop < desiredTop) {
    panel.dataset.anchorYSide = "bottom";
    panel.dataset.anchorY = String(preferredGap);
  } else if (clampedTop > desiredTop) {
    panel.dataset.anchorYSide = "top";
    panel.dataset.anchorY = String(clampedTop <= 0 ? preferredGap : clampedTop);
  }
}

function resolveAnchorDesiredPosition(app, panel) {
  syncDraggedPanelSize(panel);
  const appRect = app.getBoundingClientRect();
  const panelRect = panel.getBoundingClientRect();
  const anchorX = parseFloat(panel.dataset.anchorX ?? "");
  const anchorY = parseFloat(panel.dataset.anchorY ?? "");
  const fallbackLeft = parseFloat(panel.style.left) || 0;
  const fallbackTop = parseFloat(panel.style.top) || 0;

  const desiredLeft = Number.isFinite(anchorX)
    ? panel.dataset.anchorXSide === "right"
      ? appRect.width - panelRect.width - anchorX
      : anchorX
    : fallbackLeft;
  const desiredTop = Number.isFinite(anchorY)
    ? panel.dataset.anchorYSide === "bottom"
      ? appRect.height - panelRect.height - anchorY
      : anchorY
    : fallbackTop;

  return { desiredLeft, desiredTop };
}

function clampDraggedPanelPosition(app, panel, desiredLeft, desiredTop) {
  const appRect = app.getBoundingClientRect();
  const panelRect = panel.getBoundingClientRect();
  const brandPanel = document.getElementById("brand-panel");
  const brandRect = brandPanel ? brandPanel.getBoundingClientRect() : null;
  const brandBottom = brandRect ? brandRect.bottom - appRect.top : 0;
  const brandRight = brandRect ? brandRect.right - appRect.left : 0;

  const maxLeft = Math.max(0, appRect.width - panelRect.width);
  const maxTop = Math.max(0, appRect.height - panelRect.height);
  let nextLeft = Math.min(Math.max(desiredLeft, 0), maxLeft);
  let nextTop = Math.min(Math.max(desiredTop, 0), maxTop);

  // Brand 面板形成 L 形禁区：panel 不能进入 brand 左上角矩形区域。
  // 当两个轴同时越界时，比较两侧超出量——哪侧需要的调整量更小就卡哪侧。
  // 从右侧滑入 → leftAdjust 小 → 卡右边；从下方滑入 → topAdjust 小 → 卡底边。
  if (brandRect && nextLeft < brandRight && nextTop < brandBottom) {
    const leftAdjust = brandRight - nextLeft;
    const topAdjust = brandBottom - nextTop;
    if (leftAdjust <= topAdjust) {
      nextLeft = brandRight;
    } else {
      nextTop = brandBottom;
    }
  }
  return { left: nextLeft, top: nextTop };
}

function setupDraggableHudPanels() {
  const app = document.getElementById("container");
  const draggablePanels = document.querySelectorAll(DRAGGABLE_PANEL_SELECTOR);
  if (!app || draggablePanels.length === 0) return;

  draggablePanels.forEach((panel) => {
    const handle = panel.dataset.dragSelf === "true"
      ? panel
      : panel.querySelector(".hud-panel-drag-handle");
    if (!handle) return;

    let isDragging = false;
    let startPointerX = 0;
    let startPointerY = 0;
    let startLeft = 0;
    let startTop = 0;

    const stopDragging = () => {
      isDragging = false;
      panel.classList.remove("is-dragging");
      document.body.style.userSelect = "";
    };

    const onMove = (event) => {
      if (!isDragging) return;
      const desiredLeft = startLeft + (event.clientX - startPointerX);
      const desiredTop = startTop + (event.clientY - startPointerY);
      capturePanelAnchor(app, panel, desiredLeft, desiredTop);
      const { left, top } = clampDraggedPanelPosition(
        app,
        panel,
        desiredLeft,
        desiredTop,
      );
      panel.style.left = `${left}px`;
      panel.style.top = `${top}px`;
      panel.style.right = "auto";
      panel.style.bottom = "auto";
      panel.style.transform = "none";
      panel.dataset.dragged = "true";
      syncPanelAnchorFromClamp(app, panel, desiredLeft, desiredTop, left, top);
    };

    bindListener(handle, "pointerdown", (event) => {
      if (event.target.closest(".hud-panel-close, .hud-panel__action, .layer-panel-btn, .info-card-close, .tv-panel-select, .media-panel-tab, .tv-panel-player, .tv-panel-edge, .legend-bar-btn, .news-story-card")) return;
      isDragging = true;
      startPointerX = event.clientX;
      startPointerY = event.clientY;
      const appRect = app.getBoundingClientRect();
      const panelRect = panel.getBoundingClientRect();

      // If panel is inside a flow container (not a direct child of app), reparent
      // it so absolute positioning is relative to the app container.
      if (panel.parentElement !== app) {
        panel.dataset.originalParentId = panel.parentElement?.id || "";
        panel.dataset.originalNextSiblingId = panel.nextElementSibling?.id || "";
        const capturedWidth = panelRect.width;
        panel.dataset.dragWidthBase = String(
          capturedWidth / Math.max(getHudScaleValue(), 0.001),
        );
        panel.style.position = "absolute";
        panel.style.width = `${capturedWidth}px`;
        panel.style.margin = "0";
        app.appendChild(panel);
      }

      startLeft = panelRect.left - appRect.left;
      startTop = panelRect.top - appRect.top;
      panel.style.left = `${startLeft}px`;
      panel.style.top = `${startTop}px`;
      panel.style.right = "auto";
      panel.style.bottom = "auto";
      panel.style.transform = "none";
      panel.dataset.dragged = "true";
      capturePanelAnchor(app, panel, startLeft, startTop);
      panel.classList.add("is-dragging");
      document.body.style.userSelect = "none";
      handle.setPointerCapture?.(event.pointerId);
    });

    bindListener(handle, "pointermove", onMove);
    bindListener(handle, "pointerup", stopDragging);
    bindListener(handle, "pointercancel", stopDragging);
    bindListener(handle, "lostpointercapture", stopDragging);
  });

  const reclampDraggedPanels = () => {
    draggablePanels.forEach((panel) => {
      if (panel.dataset.dragged !== "true") return;
      syncDraggedPanelSize(panel);
      const { desiredLeft, desiredTop } = resolveAnchorDesiredPosition(
        app,
        panel,
      );
      const { left, top } = clampDraggedPanelPosition(
        app,
        panel,
        desiredLeft,
        desiredTop,
      );
      panel.style.left = `${left}px`;
      panel.style.top = `${top}px`;
      syncPanelAnchorFromClamp(app, panel, desiredLeft, desiredTop, left, top);
    });
  };

  bindListener(window, "resize", () => {
    window.requestAnimationFrame(reclampDraggedPanels);
  });
}

function clearForcedFloatingClose() {
  getFloatingGroups().forEach((group) => {
    group.classList.remove("force-closed");
  });
}

function clearForcedFloatingCloseIfPointerOutside() {
  getFloatingGroups().forEach((group) => {
    if (!group.matches(":hover")) {
      group.classList.remove("force-closed");
    }
  });
}

function setFloatingMenuOpen(group, shouldOpen) {
  closeFloatingMenus();
  clearForcedFloatingClose();
  group?.classList.toggle("open", shouldOpen);
}

function clearSelectionIfHiding(shouldHide) {
  if (shouldHide) {
    clearLockedObject();
  }
}

function bindFloatingMenu(trigger, group) {
  bindListener(trigger, "click", (event) => {
    event.stopPropagation();
    const shouldOpen = !group?.classList.contains("open");
    setFloatingMenuOpen(group, shouldOpen);
  });

  bindListener(group, "click", (event) => {
    event.stopPropagation();
  });
}

function updateTVToggleUI(visible) {
  const btn = document.getElementById("toggle-tv");
  if (!btn) return;
  btn.classList.toggle("active", visible);
  setButtonTooltip(btn, visible ? "关闭新闻直播" : "打开新闻直播");
}

function bindListener(element, eventName, handler, options) {
  if (!element) return;
  element.addEventListener(eventName, handler, options);
  listeners.push(() =>
    element.removeEventListener(eventName, handler, options),
  );
}

function resetCleanup() {
  cleanupFns.forEach((cleanup) => cleanup());
  cleanupFns = [];
  listeners.forEach((cleanup) => cleanup());
  listeners = [];
}

export function setupControls(camera, renderer, scene, earth) {
  resetCleanup();
  activeCamera = camera;
  earthObj = earth;
  setupZoomControls(camera);
  setupWheelZoom(camera, renderer);
  setupRotateControls(camera, earth);
  setupTerrainControls();
  setupLiquidGlassInteractions();
  setupToolbarHubCluster();
  setupKeyboardControls();
}

function setupZoomControls(camera) {
  let zoomInterval = null;
  let holdTimeout = null;
  let startTime = 0;
  const HOLD_THRESHOLD = 150;
  const LONG_PRESS_TICK = 50;
  const CLICK_STEP = 10;

  const MIN_PERCENT = CONFIG.minZoom * 100;
  const MAX_PERCENT = CONFIG.maxZoom * 100;

  function doZoomStep(direction) {
    let currentPercent = Math.round(zoomLevel * 100);
    let newPercent =
      direction > 0 ? currentPercent + CLICK_STEP : currentPercent - CLICK_STEP;

    if (newPercent > MAX_PERCENT) newPercent = MAX_PERCENT;
    if (newPercent < MIN_PERCENT) newPercent = MIN_PERCENT;

    zoomLevel = newPercent / 100;
    applyZoom(camera);
  }

  function doContinuousZoom(direction) {
    let currentPercent = Math.round(zoomLevel * 100);
    let newPercent = direction > 0 ? currentPercent + 1 : currentPercent - 1;

    if (newPercent > MAX_PERCENT) newPercent = MAX_PERCENT;
    if (newPercent < MIN_PERCENT) newPercent = MIN_PERCENT;

    zoomLevel = newPercent / 100;
    applyZoom(camera);
  }

  function startContinuousZoom(direction) {
    doContinuousZoom(direction);
    zoomInterval = window.setInterval(() => {
      doContinuousZoom(direction);
    }, LONG_PRESS_TICK);
  }

  function stopZoom() {
    if (zoomInterval) {
      clearInterval(zoomInterval);
      zoomInterval = null;
    }
    if (holdTimeout) {
      clearTimeout(holdTimeout);
      holdTimeout = null;
    }
  }

  function handleMouseDown(direction) {
    startTime = Date.now();
    stopZoom();
    holdTimeout = window.setTimeout(() => {
      startContinuousZoom(direction);
    }, HOLD_THRESHOLD);
  }

  function handleMouseUp(direction) {
    const heldTime = Date.now() - startTime;
    stopZoom();
    if (heldTime < HOLD_THRESHOLD) {
      doZoomStep(direction);
    }
  }

  cleanupFns.push(stopZoom);

  const zoomIn = document.getElementById("zoom-in");
  const zoomOut = document.getElementById("zoom-out");
  const zoomValue = document.getElementById("zoom-value");

  bindListener(zoomIn, "mousedown", () => handleMouseDown(1));
  bindListener(zoomIn, "mouseup", () => handleMouseUp(1));
  bindListener(zoomIn, "mouseleave", stopZoom);
  bindListener(zoomIn, "touchstart", (e) => {
    e.preventDefault();
    handleMouseDown(1);
  });
  bindListener(zoomIn, "touchend", () => handleMouseUp(1));

  bindListener(zoomOut, "mousedown", () => handleMouseDown(-1));
  bindListener(zoomOut, "mouseup", () => handleMouseUp(-1));
  bindListener(zoomOut, "mouseleave", stopZoom);
  bindListener(zoomOut, "touchstart", (e) => {
    e.preventDefault();
    handleMouseDown(-1);
  });
  bindListener(zoomOut, "touchend", () => handleMouseUp(-1));

  bindListener(zoomValue, "click", () => {
    const startZoomVal = zoomLevel;
    const targetZoom = getDefaultEarthZoomLevel();
    const startDistance = CONFIG.defaultCameraZ / startZoomVal;
    const targetDistance = CONFIG.defaultCameraZ / targetZoom;

    animateValue(
      0,
      1,
      600,
      (progress) => {
        const ease = 1 - Math.pow(1 - progress, 3);
        zoomLevel = startZoomVal + (targetZoom - startZoomVal) * ease;
        camera.position.z = CONFIG.defaultCameraZ / zoomLevel;
        const distance =
          startDistance + (targetDistance - startDistance) * ease;
        updateZoomDisplay(zoomLevel, distance.toFixed(0));
      },
      () => {
        zoomLevel = targetZoom;
        showStatusMessage(getZoomResetStatusMessage(targetZoom), "info");
      },
    );
  });
}

function setupWheelZoom(camera, renderer) {
  bindListener(
    renderer?.domElement,
    "wheel",
    (e) => {
      e.preventDefault();
      if (e.deltaY < 0) {
        zoomLevel = Math.min(zoomLevel + 0.1, CONFIG.maxZoom);
      } else {
        zoomLevel = Math.max(zoomLevel - 0.1, CONFIG.minZoom);
      }
      applyZoom(camera);
    },
    { passive: false },
  );
}

function applyZoom(camera) {
  camera.position.z = CONFIG.defaultCameraZ / zoomLevel;
  const distance = camera.position.z.toFixed(0);
  updateZoomDisplay(zoomLevel, distance);
}

function animateValue(start, end, duration, onUpdate, onComplete) {
  const animationToken = ++focusViewAnimationToken;
  const startTime = performance.now();

  function update(currentTime) {
    if (animationToken !== focusViewAnimationToken) {
      return;
    }

    const elapsed = currentTime - startTime;
    const progress = Math.min(elapsed / duration, 1);
    const easeProgress = 1 - Math.pow(1 - progress, 3);

    const current = start + (end - start) * easeProgress;
    onUpdate(current);

    if (progress < 1) {
      requestAnimationFrame(update);
    } else if (onComplete && animationToken === focusViewAnimationToken) {
      onComplete();
    }
  }

  requestAnimationFrame(update);
}

export function resetView(camera) {
  if (!earthObj) return;
  const defaultZoom = getDefaultEarthZoomLevel();

  if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(
      (pos) =>
        focusEarthView(camera, {
          lat: pos.coords.latitude,
          lon: pos.coords.longitude,
          rotLon: pos.coords.longitude - 270,
          zoom: defaultZoom,
          duration: 800,
          suppressStatus: false,
        }),
      () =>
        focusEarthView(camera, {
          lat: EARTH_CONFIG.chinaLat,
          lon: EARTH_CONFIG.chinaLon,
          rotLon: EARTH_CONFIG.chinaRotLon,
          zoom: defaultZoom,
          duration: 800,
          suppressStatus: false,
        }),
      { timeout: 5000, enableHighAccuracy: false },
    );
  } else {
    focusEarthView(camera, {
      lat: EARTH_CONFIG.chinaLat,
      lon: EARTH_CONFIG.chinaLon,
      rotLon: EARTH_CONFIG.chinaRotLon,
      zoom: defaultZoom,
      duration: 800,
      suppressStatus: false,
    });
  }

  clearLockedObject();
}

function setupRotateControls(camera) {
  const rotateBtn = document.getElementById("rotate-toggle");
  const resetViewBtn = document.getElementById("reset-view");

  bindListener(rotateBtn, "click", () => {
    const isRotating = toggleAutoRotate();
    const label = rotationMode === ROTATION_MODE.CRUISE ? "巡航" : "自动旋转";
    showStatusMessage(isRotating ? `${label}已开启` : `${label}已暂停`, "info");
  });

  updateRotateUI();

  bindListener(resetViewBtn, "click", () => {
    resetView(camera);
  });
}

function filterLayerRows(query, emptyStateEl, clearBtn) {
  const rows = document.querySelectorAll("#layer-panel-list .layer-row");
  let visibleCount = 0;
  rows.forEach((row) => {
    const name = (row.dataset.layerName || "").toLowerCase();
    const matches = !query || name.includes(query);
    row.hidden = !matches;
    if (matches) visibleCount++;
  });
  if (emptyStateEl) emptyStateEl.hidden = visibleCount > 0;
  if (clearBtn) clearBtn.hidden = !query;
}

function setupLayerPanel() {
  const panel = document.getElementById("layer-toggles");
  const collapseBtn = document.getElementById("layer-panel-collapse");
  const searchInput = document.getElementById("layer-search-input");
  const searchClear = document.getElementById("layer-search-clear");
  const emptyState = document.getElementById("layer-panel-empty");
  if (!panel) return;

  const layerPanel = createHUDPanel({
    panel,
    header: ".layer-panel-header",
    body: "#layer-panel-body",
    collapseBtn,
    collapsedClass: "layer-panel--collapsed",
    preferredDirection: "down",
    expandLabel: "展开图层列表",
    collapseLabel: "折叠图层列表",
  });

  bindListener(collapseBtn, "click", (e) => {
    e.stopPropagation();
    layerPanel.setCollapsed(!layerPanel.isCollapsed());
  });

  if (searchInput) {
    bindListener(searchInput, "input", () => {
      const query = searchInput.value.trim().toLowerCase();
      filterLayerRows(query, emptyState, searchClear);
    });

    if (searchClear) {
      bindListener(searchClear, "click", () => {
        searchInput.value = "";
        filterLayerRows("", emptyState, searchClear);
        searchInput.focus();
      });
    }
  }

  layerPanelInitialized = true;
  Array.from(layerRegistry.values()).forEach((definition) => {
    syncLayerRowDefinition(definition);
    const row = document.querySelector(`.layer-row[data-layer-id="${definition.id}"]`);
    if (row) {
      bindLayerButton(row, definition);
    }
  });
}

function createLayerRow({ buttonId, icon, label, meta, defaultActive, statusTarget }) {
  const row = document.createElement("div");
  row.className = "layer-row";
  row.dataset.layerName = `${label} ${meta || ""}`.trim().toLowerCase();
  row.innerHTML = `
    <span class="material-symbols-rounded layer-row-icon">${icon}</span>
    <div class="layer-row-copy">
      <span class="layer-row-label">${label}</span>
      ${meta ? `<span class="layer-row-meta">${meta}</span>` : ""}
    </div>
    <button id="${buttonId}" class="layer-row-toggle${defaultActive ? " active" : ""}" type="button"
      role="switch" aria-checked="${defaultActive ? "true" : "false"}" title="切换${label}显示"${statusTarget ? ` data-status-target="${statusTarget}"` : ""}>
      <span class="layer-row-toggle-track"></span>
    </button>
  `;
  return row;
}

function bindLayerButton(row, definition) {
  const button = row.querySelector("button");
  if (!(button instanceof HTMLButtonElement)) return;
  if (button.dataset.layerBound === "true") return;

  bindListener(button, "click", async function () {
    if (this.classList.contains("is-loading")) {
      return;
    }
    await definition.setVisible(!definition.getVisible());
  });
  button.dataset.layerBound = "true";
}

export function registerLayer({
  id,
  icon,
  label,
  meta = "",
  keywords = "",
  defaultActive = false,
  persist = true,
  startupPriority = null,
  startupMode = "visible",
  startupLabel = "",
  startupMessage = "",
  buttonId = `toggle-${id}`,
  statusTarget = "",
  getVisible = null,
  setVisible = null,
  onToggle = null,
}) {
  const definition = registerLayerDefinition(
    {
      id,
      buttonId,
      icon,
      label,
      meta,
      keywords,
      defaultActive,
      persist,
      startupPriority,
      startupMode,
      startupLabel,
      startupMessage,
      statusTarget,
      getVisible:
        typeof getVisible === "function"
          ? getVisible
          : () => getLayerButton(id)?.classList.contains("active") ?? defaultActive,
      setVisible:
        typeof setVisible === "function"
          ? setVisible
          : async (visible) => {
              if (typeof onToggle === "function") {
                await onToggle(visible);
              }
            },
    },
    { appendIfMissing: true },
  );

  return definition;
}

export function getStartupLoadLayers() {
  if (layerRegistry.size === 0) {
    initializeLayerRegistry();
  }

  return getSortedLayerDefinitions({ includeUnprioritized: false })
    .filter(shouldIncludeLayerInStartupLoad)
    .map((definition) => ({ ...definition }));
}

function setupTerrainControls() {
  initializeLayerRegistry();
  const container = document.getElementById("container");
  const searchBtn = document.getElementById("search-action");
  const terrainBtn = getLayerButton("terrain");
  const layoutBtn = document.getElementById("layout-toggle");
  const reloadBtn = document.getElementById("reload-data");
  const zoomGroup = document.getElementById("zoom-control-group");
  const zoomTrigger = document.getElementById("zoom-trigger");
  setupSettingsControls();
  setupHudPanelControls();
  setupDraggableHudPanels();
  setupLayerPanel();

  bindListener(searchBtn, "click", () => {
    openSearchPanel();
  });

  bindListener(terrainBtn, "pointerenter", () => {
    prewarmTerrainIfNeeded();
  });

  bindListener(terrainBtn, "focus", () => {
    prewarmTerrainIfNeeded();
  });

  scheduleTerrainPrefetch();

  bindListener(reloadBtn, "click", async () => {
    await reloadData();
  });

  bindFloatingMenu(zoomTrigger, zoomGroup);

  bindListener(document, "click", (event) => {
    const openGroups = [zoomGroup].filter((group) =>
      group?.classList.contains("open"),
    );
    if (openGroups.length === 0) return;

    const clickedInsideOpenGroup = openGroups.some((group) =>
      group.contains(event.target),
    );
    if (!clickedInsideOpenGroup) {
      closeFloatingMenus();
    }
  });

  bindListener(document, "mousemove", () => {
    clearForcedFloatingCloseIfPointerOutside();
  });

  bindListener(layoutBtn, "click", () => {
    const expanded = toggleLayoutExpanded(container);
    showStatusMessage(expanded ? "布局已最大化" : "布局已恢复", "info");
  });

  const mediaVisible = !document.getElementById("media-panel")?.classList.contains("hud-panel-hidden");
  updateTVToggleUI(mediaVisible);
  if (mediaVisible) {
    ensureTVPanelReady().catch((error) => {
      console.error("初始化电视直播面板失败:", error);
    });
  }
  updateNewsToggleUI(mediaVisible);
  ensureNewsPanelReady().catch((error) => {
    console.error("初始化态势新闻内容失败:", error);
  });
  updateLayoutUI(container);
}

function setupKeyboardControls() {
  bindListener(document, "keydown", (event) => {
    if (event.key !== "Escape") return;

    if (isSettingsModalOpen()) {
      closeSettingsModal();
      return;
    }

    if (isFloatingMenuVisible()) {
      closeFloatingMenus();
      return;
    }

    clearLockedObjectAndInfo();
  });
}

function setupLiquidGlassInteractions() {
  const surfaces = document.querySelectorAll(".liquid-glass-surface, .hud-panel");

  const resetSurface = (surface) => {
    surface.style.setProperty("--elastic-x", "0px");
    surface.style.setProperty("--elastic-y", "0px");
    surface.style.setProperty("--tilt-x", "0deg");
    surface.style.setProperty("--tilt-y", "0deg");
    surface.style.setProperty("--panel-tilt-x", "0deg");
    surface.style.setProperty("--panel-tilt-y", "0deg");
    surface.style.setProperty("--dock-scale", "1");
    surface.style.setProperty("--dock-lift", "0px");
    surface.style.setProperty("--dock-shift-x", "0px");
    surface.style.setProperty("--glow-x", "50%");
    surface.style.setProperty("--glow-y", "22%");
    surface.style.setProperty("--glow-opacity", "0.24");
    surface.style.setProperty("--panel-glow-x", "18%");
    surface.style.setProperty("--panel-glow-y", "0%");
    surface.style.setProperty("--panel-glow-opacity", "0.1");
    surface.classList.remove("dock-focused");
    surface.classList.remove("dock-active");
    surface.classList.remove("is-pressed");
  };

  surfaces.forEach((surface) => {
    resetSurface(surface);
    const isToolbarSurface = Boolean(surface.closest(".earth-toolbar-items"));
    const isPanelSurface = surface.classList.contains("hud-panel");

    bindListener(surface, "pointermove", (event) => {
      const rect = surface.getBoundingClientRect();
      const px = (event.clientX - rect.left) / rect.width;
      const py = (event.clientY - rect.top) / rect.height;
      if (isPanelSurface) {
        const panelTiltX = (0.5 - py) * 5;
        const panelTiltY = (px - 0.5) * 6;
        surface.style.setProperty("--panel-glow-x", `${(px * 100).toFixed(1)}%`);
        surface.style.setProperty("--panel-glow-y", `${(py * 100).toFixed(1)}%`);
        surface.style.setProperty("--panel-glow-opacity", "0.16");
        surface.style.setProperty("--panel-tilt-x", `${panelTiltX.toFixed(2)}deg`);
        surface.style.setProperty("--panel-tilt-y", `${panelTiltY.toFixed(2)}deg`);
      } else if (!isToolbarSurface) {
        const offsetX = (px - 0.5) * 6;
        const offsetY = (py - 0.5) * 6;
        const tiltX = (0.5 - py) * 8;
        const tiltY = (px - 0.5) * 10;

        surface.style.setProperty("--elastic-x", `${offsetX.toFixed(2)}px`);
        surface.style.setProperty("--elastic-y", `${offsetY.toFixed(2)}px`);
        surface.style.setProperty("--tilt-x", `${tiltX.toFixed(2)}deg`);
        surface.style.setProperty("--tilt-y", `${tiltY.toFixed(2)}deg`);
      }
      surface.style.setProperty("--glow-x", `${(px * 100).toFixed(1)}%`);
      surface.style.setProperty("--glow-y", `${(py * 100).toFixed(1)}%`);
      surface.style.setProperty("--glow-opacity", "0.34");
    });

    bindListener(surface, "pointerenter", () => {
      if (isPanelSurface) {
        surface.style.setProperty("--panel-glow-opacity", "0.14");
      } else {
        surface.style.setProperty("--glow-opacity", "0.28");
      }
    });

    bindListener(surface, "pointerleave", () => {
      resetSurface(surface);
    });

    bindListener(surface, "pointerdown", () => {
      surface.classList.add("is-pressed");
    });

    bindListener(surface, "pointerup", () => {
      surface.classList.remove("is-pressed");
    });

    bindListener(surface, "pointercancel", () => {
      resetSurface(surface);
    });
  });
}

function setupToolbarHubCluster() {
  const cluster = document.getElementById("toolbar-cluster");
  const hub = document.getElementById("toolbar-hub");
  const toolbar = document.getElementById("control-toolbar");
  if (
    !(cluster instanceof HTMLElement) ||
    !(hub instanceof HTMLButtonElement) ||
    !(toolbar instanceof HTMLElement)
  ) {
    return;
  }

  let collapseTimer = null;
  let expandedToolbarBounds = null;
  let refreshBoundsFrameId = 0;

  const layoutToolbarOrbs = () => {
    const orbs = Array.from(cluster.querySelectorAll(".earth-toolbar-orb"));
    if (orbs.length === 0) return;

    const toolbarWidth = toolbar.clientWidth || TOOLBAR_BASE_WIDTH_PX;
    const orbCount = orbs.length;
    const viewportScale = Math.min(
      window.innerWidth / 1920,
      window.innerHeight / 1080,
    );

    let toolbarScale = THREE.MathUtils.clamp(
      Math.min(toolbarWidth / TOOLBAR_BASE_WIDTH_PX, viewportScale),
      TOOLBAR_MIN_SCALE,
      1,
    );

    let orbSize = TOOLBAR_ORB_SIZE_PX * toolbarScale;
    let desiredGap = TOOLBAR_ORB_GAP_PX * toolbarScale;
    let span = TOOLBAR_ARCH_SPAN_PX * toolbarScale;
    let rise = TOOLBAR_ARCH_RISE_PX * toolbarScale;
    const minSpanForSpacing =
      orbCount > 1 ? (orbCount - 1) * (orbSize + desiredGap) : orbSize;
    const maxSpanByWidth =
      toolbarWidth - orbSize - TOOLBAR_SIDE_PADDING_PX * 2 * toolbarScale;

    if (minSpanForSpacing > maxSpanByWidth) {
      toolbarScale = THREE.MathUtils.clamp(
        maxSpanByWidth / minSpanForSpacing,
        TOOLBAR_MIN_SCALE,
        toolbarScale,
      );
      orbSize = TOOLBAR_ORB_SIZE_PX * toolbarScale;
      desiredGap = TOOLBAR_ORB_GAP_PX * toolbarScale;
      span = TOOLBAR_ARCH_SPAN_PX * toolbarScale;
      rise = TOOLBAR_ARCH_RISE_PX * toolbarScale;
    }

    span = THREE.MathUtils.clamp(
      span,
      minSpanForSpacing,
      maxSpanByWidth,
    );
    rise = Math.min(rise, span * 0.32);

    const hubSize = TOOLBAR_HUB_SIZE_PX * toolbarScale;
    const maxVerticalReach = rise + orbSize * 0.5;
    const toolbarHeight = maxVerticalReach + hubSize + TOOLBAR_BOTTOM_CLEARANCE_PX * toolbarScale + TOOLBAR_EXTRA_HEIGHT_PX * toolbarScale;

    toolbar.style.setProperty("--toolbar-scale", toolbarScale.toFixed(3));
    toolbar.style.height = `${Math.ceil(toolbarHeight)}px`;
    toolbar.style.setProperty("--toolbar-arc-width", `${Math.ceil(span + orbSize + (TOOLBAR_SIDE_PADDING_PX * 2 * toolbarScale))}px`);
    toolbar.style.setProperty("--toolbar-arc-height", `${Math.ceil(rise + orbSize * 0.95)}px`);
    toolbar.style.setProperty("--toolbar-inner-arc-width", `${Math.ceil(span * 0.72)}px`);
    toolbar.style.setProperty("--toolbar-inner-arc-height", `${Math.ceil((hubSize * 0.8) + (desiredGap * 0.5))}px`);

    orbs.forEach((orb, index) => {
      const t = orbCount === 1 ? 0.5 : index / (orbCount - 1);
      const x = (t - 0.5) * span;
      const normalized = (x / (span / 2 || 1));
      const y = -(1 - normalized * normalized) * rise;
      orb.style.setProperty("--orb-x", `${x.toFixed(2)}px`);
      orb.style.setProperty("--orb-y", `${y.toFixed(2)}px`);
    });

    if (cluster.classList.contains("is-expanded")) {
      scheduleExpandedToolbarBoundsRefresh();
    }
  };

  const setExpanded = (expanded) => {
    cluster.classList.toggle("is-expanded", expanded);
    cluster.classList.toggle("is-collapsed", !expanded);
    if (!expanded) {
      expandedToolbarBounds = null;
      if (refreshBoundsFrameId) {
        cancelAnimationFrame(refreshBoundsFrameId);
        refreshBoundsFrameId = 0;
      }
      return;
    }
    scheduleExpandedToolbarBoundsRefresh();
  };

  const scheduleCollapse = () => {
    if (collapseTimer) clearTimeout(collapseTimer);
    collapseTimer = window.setTimeout(() => {
      setExpanded(false);
      collapseTimer = null;
    }, 200);
  };

  const cancelCollapse = () => {
    if (collapseTimer) {
      clearTimeout(collapseTimer);
      collapseTimer = null;
    }
  };

  cleanupFns.push(() => {
    if (collapseTimer) clearTimeout(collapseTimer);
    if (refreshBoundsFrameId) {
      cancelAnimationFrame(refreshBoundsFrameId);
      refreshBoundsFrameId = 0;
    }
  });

  // Start collapsed — hub acts as the hover target to reveal the arc
  layoutToolbarOrbs();
  setExpanded(false);

  bindListener(window, "resize", layoutToolbarOrbs);

  bindListener(hub, "mouseenter", () => {
    cancelCollapse();
    setExpanded(true);
  });

  bindListener(hub, "focus", () => {
    cancelCollapse();
    setExpanded(true);
  });

  const HOVER_PADDING_PX = 12;
  const collectExpandedToolbarBounds = () => {
    const rects = [];
    const pushRect = (element) => {
      if (!(element instanceof HTMLElement)) return;
      const rect = element.getBoundingClientRect();
      if (rect.width <= 0 || rect.height <= 0) return;
      rects.push(rect);
    };

    pushRect(hub);
    cluster.querySelectorAll(".earth-toolbar-orb > *").forEach((node) => {
      if (!(node instanceof HTMLElement)) return;
      pushRect(node);
      const popover = node.parentElement?.querySelector(".earth-stack-toolbar");
      if (
        popover instanceof HTMLElement &&
        (node.parentElement?.matches(":hover") ||
          node.parentElement?.matches(":focus-within") ||
          node.parentElement?.classList.contains("open"))
      ) {
        pushRect(popover);
      }
    });

    if (rects.length === 0) return null;

    const bounds = rects.reduce(
      (acc, rect) => ({
        left: Math.min(acc.left, rect.left),
        top: Math.min(acc.top, rect.top),
        right: Math.max(acc.right, rect.right),
        bottom: Math.max(acc.bottom, rect.bottom),
      }),
      {
        left: Number.POSITIVE_INFINITY,
        top: Number.POSITIVE_INFINITY,
        right: Number.NEGATIVE_INFINITY,
        bottom: Number.NEGATIVE_INFINITY,
      },
    );

    return {
      left: bounds.left - HOVER_PADDING_PX,
      top: bounds.top - HOVER_PADDING_PX,
      right: bounds.right + HOVER_PADDING_PX,
      bottom: bounds.bottom + HOVER_PADDING_PX,
    };
  };

  const scheduleExpandedToolbarBoundsRefresh = () => {
    if (refreshBoundsFrameId) return;
    refreshBoundsFrameId = window.requestAnimationFrame(() => {
      expandedToolbarBounds = collectExpandedToolbarBounds();
      refreshBoundsFrameId = 0;
    });
  };

  bindListener(document, "mousemove", (event) => {
    if (!cluster.classList.contains("is-expanded")) return;
    if (
      event.target instanceof Element &&
      event.target.closest("#toolbar-cluster, .earth-stack-toolbar")
    ) {
      scheduleExpandedToolbarBoundsRefresh();
    }
    const activeBounds = expandedToolbarBounds;
    if (!activeBounds) {
      scheduleCollapse();
      return;
    }
    const isInside =
      event.clientX >= activeBounds.left &&
      event.clientX <= activeBounds.right &&
      event.clientY >= activeBounds.top &&
      event.clientY <= activeBounds.bottom;
    if (isInside) {
      cancelCollapse();
    } else {
      scheduleCollapse();
    }
  });

  bindListener(cluster, "mouseenter", () => {
    if (cluster.classList.contains("is-expanded")) {
      scheduleExpandedToolbarBoundsRefresh();
    }
  });

  bindListener(cluster, "focusin", () => {
    if (cluster.classList.contains("is-expanded")) {
      scheduleExpandedToolbarBoundsRefresh();
    }
  });
}

export function teardownControls() {
  resetCleanup();
  activeCamera = null;
}

export function getAutoRotate() {
  return autoRotate;
}

function getRotationModeLabel(mode = rotationMode) {
  return mode === ROTATION_MODE.CRUISE ? "巡航模式" : "旋转模式";
}

function syncRotationModeButtons() {
  const buttons = document.querySelectorAll("[data-rotation-mode]");
  buttons.forEach((button) => {
    if (!(button instanceof HTMLButtonElement)) return;
    const isActive = button.dataset.rotationMode === rotationMode;
    button.classList.toggle("is-active", isActive);
    button.setAttribute("aria-pressed", isActive ? "true" : "false");
  });
}

function updateRotateUI() {
  const btn = document.getElementById("rotate-toggle");
  if (btn) {
    btn.classList.toggle("active", autoRotate);
    btn.classList.toggle("is-stopped", !autoRotate);
    const tooltip = btn.querySelector(".earth-toolbar-tooltip");
    const activeLabel =
      rotationMode === ROTATION_MODE.CRUISE ? "巡航" : "自动旋转";
    if (tooltip) {
      tooltip.textContent = autoRotate ? `暂停${activeLabel}` : `开始${activeLabel}`;
    }
    btn.title = `${getRotationModeLabel()} · ${activeLabel}`;
  }

  syncRotationModeButtons();
}

export function setAutoRotate(value) {
  autoRotate = value;
  updateRotateUI();
  if (rotationMode === ROTATION_MODE.CRUISE) {
    dispatchRotationModeChange();
  }
}

export function toggleAutoRotate() {
  autoRotate = !autoRotate;
  updateRotateUI();
  clearLockedObject();
  if (rotationMode === ROTATION_MODE.CRUISE) {
    dispatchRotationModeChange();
  }
  return autoRotate;
}

export function getRotationMode() {
  return rotationMode;
}

export function setRotationMode(nextMode, { persist = true, suppressStatus = false } = {}) {
  const normalizedMode =
    nextMode === ROTATION_MODE.CRUISE ? ROTATION_MODE.CRUISE : ROTATION_MODE.ROTATE;
  const changed = normalizedMode !== rotationMode;
  if (changed && normalizedMode === ROTATION_MODE.CRUISE) {
    autoRotate = true;
  }
  rotationMode = normalizedMode;
  updateRotateUI();
  dispatchRotationModeChange();
  if (persist) {
    persistEarthSettings();
  }
  if (changed && !suppressStatus) {
    showStatusMessage(
      normalizedMode === ROTATION_MODE.CRUISE ? "已切换到巡航模式" : "已切换到旋转模式",
      "info",
    );
  }
}

export function focusEarthView(camera, options = {}) {
  if (!earthObj || !camera) return Promise.resolve();

  const {
    lat = EARTH_CONFIG.chinaLat,
    lon = EARTH_CONFIG.chinaLon,
    rotLon = lon - 270,
    zoom = getDefaultEarthZoomLevel(),
    duration = 800,
    suppressStatus = true,
  } = options;

  return new Promise((resolve) => {
    const nextRotation = getViewRotation(lat, rotLon);
    const startRotX = earthObj.rotation.x;
    const startRotY = earthObj.rotation.y;
    const startZoom = zoomLevel;

    animateValue(
      0,
      1,
      duration,
      (progress) => {
        const ease = 1 - Math.pow(1 - progress, 3);
        earthObj.rotation.x = startRotX + (nextRotation.x - startRotX) * ease;
        earthObj.rotation.y = startRotY + (nextRotation.y - startRotY) * ease;
        zoomLevel = startZoom + (zoom - startZoom) * ease;
        camera.position.z = CONFIG.defaultCameraZ / zoomLevel;
        updateZoomDisplay(zoomLevel, camera.position.z.toFixed(0));
      },
      () => {
        zoomLevel = zoom;
        if (!suppressStatus) {
          showStatusMessage("视角已重置", "info");
        }
        resolve();
      },
    );
  });
}

export function getZoomLevel() {
  return zoomLevel;
}

export function getDefaultEarthZoomLevel() {
  return defaultEarthZoom;
}

export function getShowTerrain() {
  return showTerrain;
}

function updateLayoutUI(container) {
  if (container) {
    container.classList.toggle("layout-expanded", layoutExpanded);
  }

  const btn = document.getElementById("layout-toggle");
  if (btn) {
    btn.classList.toggle("active", layoutExpanded);
    const tooltip = btn.querySelector(".earth-toolbar-tooltip");
    const nextLabel = layoutExpanded ? "恢复布局" : "最大化布局";
    btn.title = nextLabel;
    if (tooltip) tooltip.textContent = nextLabel;
  }
}

function resetPanelInlineLayout(panel) {
  const originalParentId = panel.dataset.originalParentId;
  if (originalParentId) {
    const originalParent = document.getElementById(originalParentId);
    if (originalParent) {
      const nextId = panel.dataset.originalNextSiblingId;
      const nextSibling = nextId ? document.getElementById(nextId) : null;
      if (nextSibling) {
        originalParent.insertBefore(panel, nextSibling);
      } else {
        originalParent.appendChild(panel);
      }
    }
    delete panel.dataset.originalParentId;
    delete panel.dataset.originalNextSiblingId;
  }
  panel.style.left = "";
  panel.style.top = "";
  panel.style.right = "";
  panel.style.bottom = "";
  panel.style.transform = "";
  panel.style.position = "";
  panel.style.width = "";
  panel.style.margin = "";
  delete panel.dataset.dragged;
  delete panel.dataset.anchorX;
  delete panel.dataset.anchorY;
  delete panel.dataset.anchorXSide;
  delete panel.dataset.anchorYSide;
  delete panel.dataset.dragWidthBase;
}

function isPanelVisible(panel) {
  return !panel.classList.contains("hud-panel-hidden");
}

function animatePanelLayoutTransition(container, expand) {
  const panels = Array.from(
    container.querySelectorAll(DRAGGABLE_PANEL_SELECTOR),
  );
  if (panels.length === 0) {
    layoutExpanded = expand;
    updateLayoutUI(container);
    return expand;
  }

  const visiblePanels = panels.filter(isPanelVisible);
  const firstRects = new Map(
    visiblePanels.map((panel) => [panel, panel.getBoundingClientRect()]),
  );

  panels.forEach((panel) => panel.classList.add("is-layout-animating"));
  layoutExpanded = expand;
  panels.forEach(resetPanelInlineLayout);
  updateLayoutUI(container);

  visiblePanels.forEach((panel) => {
    const firstRect = firstRects.get(panel);
    if (!firstRect) return;

    const lastRect = panel.getBoundingClientRect();
    const deltaX = firstRect.left - lastRect.left;
    const deltaY = firstRect.top - lastRect.top;

    if (Math.abs(deltaX) < 0.5 && Math.abs(deltaY) < 0.5) {
      return;
    }

    panel.animate(
      [
        {
          translate: `${deltaX}px ${deltaY}px`,
        },
        {
          translate: "0 0",
        },
      ],
      {
        duration: PANEL_LAYOUT_ANIMATION_MS,
        easing: "cubic-bezier(0.22, 1, 0.36, 1)",
      },
    );
  });

  window.setTimeout(() => {
    panels.forEach((panel) => panel.classList.remove("is-layout-animating"));
  }, PANEL_LAYOUT_ANIMATION_MS);

  return expand;
}

function toggleLayoutExpanded(container) {
  return animatePanelLayoutTransition(container, !layoutExpanded);
}