import { PATHS } from "./constants.js";

const RECENT_EVENT_TTL_MS = 15_000;
const recentEventMap = new Map();

function normalizeErrorDetail(detail) {
  if (!detail) return "";
  if (detail instanceof Error) {
    return detail.stack || detail.message || String(detail);
  }
  if (typeof detail === "string") {
    return detail;
  }
  try {
    return JSON.stringify(detail);
  } catch {
    return String(detail);
  }
}

function dedupeKey(level, message, detail, category) {
  return `${level}::${category || ""}::${message}::${detail}`;
}

function shouldSkip(level, message, detail, category) {
  const key = dedupeKey(level, message, detail, category);
  const now = Date.now();
  const lastSeenAt = recentEventMap.get(key);
  recentEventMap.set(key, now);

  for (const [entryKey, entryTime] of recentEventMap.entries()) {
    if (now - entryTime > RECENT_EVENT_TTL_MS) {
      recentEventMap.delete(entryKey);
    }
  }

  return lastSeenAt && now - lastSeenAt < RECENT_EVENT_TTL_MS;
}

export async function reportEarthClientLog({
  level = "error",
  message,
  category = "runtime",
  module = "earth",
  detail = "",
}) {
  if (!message) return;
  const normalizedDetail = normalizeErrorDetail(detail);
  if (shouldSkip(level, message, normalizedDetail, category)) {
    return;
  }

  try {
    await fetch(PATHS.earthClientLogsApi, {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
      },
      body: JSON.stringify({
        level,
        message,
        category,
        module,
        url: window.location.href,
        detail: normalizedDetail.slice(0, 4000),
      }),
      keepalive: true,
    });
  } catch {
    // Swallow reporting failures to avoid recursive log noise.
  }
}

export function registerEarthClientErrorHandlers() {
  window.addEventListener("error", (event) => {
    console.error("全局错误:", event.error);
    void reportEarthClientLog({
      level: "error",
      category: "window-error",
      module: "main",
      message: event.message || "Earth 页面发生未捕获错误",
      detail: event.error || `${event.filename || ""}:${event.lineno || 0}:${event.colno || 0}`,
    });
  });

  window.addEventListener("unhandledrejection", (event) => {
    console.error("未处理的 Promise 错误:", event.reason);
    void reportEarthClientLog({
      level: "error",
      category: "unhandledrejection",
      module: "main",
      message: "Earth 页面发生未处理 Promise 错误",
      detail: event.reason,
    });
  });
}