// info-card.js - Unified info card module
import { showStatusMessage } from './ui.js';

let currentType = null;
let cardMounted = false;

const CARD_CONFIG = {
  cable: {
    icon: '🛥️',
    title: '电缆详情',
    className: 'cable',
    fields: [
      { key: 'name', label: '名称' },
      { key: 'owner', label: '所有者' },
      { key: 'status', label: '状态' },
      { key: 'length', label: '长度' },
      { key: 'coords', label: '经纬度' },
      { key: 'rfs', label: '投入使用' }
    ]
  },
  satellite: {
    icon: '🛰️',
    title: '卫星详情',
    className: 'satellite',
    fields: [
      { key: 'name', label: '名称' },
      { key: 'norad_id', label: 'NORAD ID' },
      { key: 'inclination', label: '倾角', unit: '°' },
      { key: 'period', label: '周期', unit: '分钟' },
      { key: 'perigee', label: '近地点', unit: 'km' },
      { key: 'apogee', label: '远地点', unit: 'km' }
    ]
  },
  bgp: {
    icon: '📡',
    title: 'BGP事件详情',
    className: 'bgp',
    fields: [
      { key: 'anomaly_type', label: '事件类型' },
      { key: 'severity', label: '严重度' },
      { key: 'status', label: '状态' },
      { key: 'route_change', label: '事件特征' },
      { key: 'prefix', label: '前缀' },
      { key: 'as_path_display', label: '传播路径' },
      { key: 'origin_asn', label: '涉及 ASN' },
      { key: 'new_origin_asn', label: '关联 ASN' },
      { key: 'confidence', label: '置信度' },
      { key: 'collector', label: '主观测站' },
      { key: 'observed_by', label: '观测范围' },
      { key: 'impacted_scope', label: '影响区域' },
      { key: 'related_cables', label: '附近基础设施' },
      { key: 'related_satellites', label: '附近卫星' },
      { key: 'location', label: '观测位置' },
      { key: 'created_at', label: '事件时间' },
      { key: 'summary', label: '摘要' }
    ]
  },
  bgp_collector: {
    icon: '📍',
    title: 'BGP观测站详情',
    className: 'bgp',
    fields: [
      { key: 'collector', label: '采集器' },
      { key: 'location', label: '观测位置' },
      { key: 'anomaly_count', label: '当前事件数' },
      { key: 'observation_count', label: '观测事件数' },
      { key: 'recent_24h_observation_count', label: '近24h事件数' },
      { key: 'recent_7d_observation_count', label: '近7d事件数' },
      { key: 'prefix_count', label: '观测前缀数' },
      { key: 'origin_asn_count', label: '观测 ASN 数' },
      { key: 'top_event_types', label: '主要事件类型' },
      { key: 'coverage_halo', label: '日常活跃度' },
      { key: 'related_satellites', label: '附近卫星' },
      { key: 'latest_event_type', label: '最近事件类型' },
      { key: 'latest_observed_at', label: '最近活跃时间' },
      { key: 'baseline_scope', label: '日常覆盖范围' },
      { key: 'status', label: '状态' }
    ]
  },
  supercomputer: {
    icon: '🖥️',
    title: '超算详情',
    className: 'supercomputer',
    fields: [
      { key: 'name', label: '名称' },
      { key: 'rank', label: '排名' },
      { key: 'r_max', label: 'Rmax', unit: 'GFlops' },
      { key: 'r_peak', label: 'Rpeak', unit: 'GFlops' },
      { key: 'country', label: '国家' },
      { key: 'city', label: '城市' }
    ]
  },
  gpu_cluster: {
    icon: '🎮',
    title: 'GPU集群详情',
    className: 'gpu_cluster',
    fields: [
      { key: 'name', label: '名称' },
      { key: 'country', label: '国家' },
      { key: 'city', label: '城市' }
    ]
  }
};

function getPanel() {
  return document.getElementById('info-panel');
}

function setupInfoCardDrag(panel) {
  const app = document.getElementById('container');
  if (!app) return;

  const handle = 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 appRect = app.getBoundingClientRect();
    const panelRect = panel.getBoundingClientRect();
    const nextLeft = Math.min(
      Math.max(startLeft + (event.clientX - startPointerX), 0),
      appRect.width - panelRect.width,
    );
    const nextTop = Math.min(
      Math.max(startTop + (event.clientY - startPointerY), 0),
      appRect.height - panelRect.height,
    );
    panel.style.left = `${nextLeft}px`;
    panel.style.top = `${nextTop}px`;
  };

  handle.addEventListener('pointerdown', (event) => {
    if (event.target.closest('.hud-panel-close, .info-card-close')) return;
    isDragging = true;
    startPointerX = event.clientX;
    startPointerY = event.clientY;
    const appRect = app.getBoundingClientRect();
    const panelRect = panel.getBoundingClientRect();
    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.classList.add('is-dragging');
    document.body.style.userSelect = 'none';
    handle.setPointerCapture?.(event.pointerId);
  });

  handle.addEventListener('pointermove', onMove);
  handle.addEventListener('pointerup', stopDragging);
  handle.addEventListener('pointercancel', stopDragging);
  handle.addEventListener('lostpointercapture', stopDragging);
}

function mountCard() {
  if (cardMounted) return;

  const container = document.getElementById('container');
  if (!container) return;

  const panel = document.createElement('div');
  panel.id = 'info-panel';
  panel.className = 'hud-panel hud-panel-info';
  panel.setAttribute('aria-live', 'polite');
  panel.innerHTML = `
    <div id="info-card" class="info-card">
      <div class="info-card-header hud-panel-drag-handle">
        <span class="info-card-icon" id="info-card-icon">🛰️</span>
        <h3 id="info-card-title">详情</h3>
        <button class="info-card-close hud-panel-close" type="button" aria-label="关闭详情">
          <span class="material-symbols-rounded">close</span>
        </button>
      </div>
      <div id="info-card-content" class="info-card-content"></div>
    </div>
  `;

  container.appendChild(panel);

  const card = panel.querySelector('#info-card');
  const content = panel.querySelector('#info-card-content');

  // Prevent pointer events from reaching the earth canvas
  const stopEvent = (event) => { event.stopPropagation(); };
  [
    'mousemove', 'mousedown', 'mouseup', 'click', 'dblclick', 'wheel',
    'pointerdown', 'pointerup', 'pointermove',
    'touchstart', 'touchmove', 'touchend',
  ].forEach((evt) => card.addEventListener(evt, stopEvent, { passive: false }));

  // Close button
  const closeBtn = card.querySelector('.info-card-close');
  if (closeBtn) {
    closeBtn.addEventListener('click', (event) => {
      event.stopPropagation();
      hideInfoCard();
    });
  }

  // Copy value on label click
  content.addEventListener('click', async (event) => {
    const label = event.target.closest('.info-card-label');
    if (!label) return;

    const property = label.closest('.info-card-property');
    const valueEl = property?.querySelector('.info-card-value');
    const value = valueEl?.textContent?.trim();

    if (!value || value === '-') {
      showStatusMessage('无可复制内容', 'warning');
      return;
    }

    try {
      await navigator.clipboard.writeText(value);
      showStatusMessage(`已复制${label.textContent}：${value}`, 'success');
    } catch (error) {
      console.error('Copy failed:', error);
      showStatusMessage('复制失败', 'error');
    }
  });

  setupInfoCardDrag(panel);

  cardMounted = true;
}

function positionPanel(panel, x, y, options = {}) {
  if (!panel) return;
  const margin = 12;
  const offset = 14;
  const vpW = window.innerWidth;
  const vpH = window.innerHeight;

  const scale = parseFloat(
    getComputedStyle(document.documentElement).getPropertyValue('--hud-scale')
  ) || 1;
  const estW = Math.min(300 * scale, vpW - 32);
  const estH = Math.min(420 * scale, vpH * 0.7);

  if (options.absolute === true) {
    const clampedLeft = Math.min(
      Math.max(margin, x),
      Math.max(margin, vpW - estW - margin),
    );
    const clampedTop = Math.min(
      Math.max(margin, y),
      Math.max(margin, vpH - estH - margin),
    );
    panel.style.left = `${clampedLeft}px`;
    panel.style.top = `${clampedTop}px`;
    panel.style.right = 'auto';
    panel.style.bottom = 'auto';
    return;
  }

  let left = x + offset;
  let top = y + offset;

  if (left + estW > vpW - margin) left = x - estW - offset;
  if (top + estH > vpH - margin) top = Math.max(margin, vpH - estH - margin);

  panel.style.left = `${Math.max(margin, left)}px`;
  panel.style.top = `${Math.max(margin, top)}px`;
  panel.style.right = 'auto';
  panel.style.bottom = 'auto';
}

function showPanel(x, y, options = {}) {
  const panel = getPanel();
  if (!panel) return;
  if (x != null && y != null) positionPanel(panel, x, y, options);
  panel.classList.add('is-visible');
}

function hidePanel() {
  const panel = getPanel();
  if (panel) panel.classList.remove('is-visible');
}

// No-op: event binding now happens lazily in mountCard()
export function initInfoCard() {}

export function setInfoCardNoBorder(noBorder = true) {
  const card = document.getElementById('info-card');
  if (card) {
    card.classList.toggle('no-border', noBorder);
  }
}

export function showInfoCard(type, data, options = {}) {
  const config = CARD_CONFIG[type];
  if (!config) {
    console.warn('Unknown info card type:', type);
    return;
  }

  mountCard();

  currentType = type;
  const card = document.getElementById('info-card');
  const icon = document.getElementById('info-card-icon');
  const title = document.getElementById('info-card-title');
  const content = document.getElementById('info-card-content');

  card.className = 'info-card ' + config.className;
  icon.textContent = config.icon;
  title.textContent = config.title;

  let html = '';
  for (const field of config.fields) {
    let value = data[field.key];

    if (value === undefined || value === null || value === '') {
      value = '-';
    } else if (typeof value === 'number') {
      value = value.toLocaleString();
    }

    if (field.unit && value !== '-') {
      value = value + ' ' + field.unit;
    }

    html += `
      <div class="info-card-property">
        <span class="info-card-label">${field.label}</span>
        <span class="info-card-value">${value}</span>
      </div>
    `;
  }

  content.innerHTML = html;
  showPanel(options.x, options.y, options);
}

export function hideInfoCard() {
  hidePanel();
  currentType = null;
}

export function getCurrentType() {
  return currentType;
}