window.addEventListener("message", (event) => {
  if (event.source !== window) return;

  if (event.data?.type === "HAIXUN_PING_EXTENSION") {
    window.postMessage({ type: "HAIXUN_EXTENSION_READY" }, "*");
    return;
  }

  if (event.data?.type !== "HAIXUN_REQUEST_THREADS_SYNC") return;

  chrome.runtime
    .sendMessage({
      action: "sync",
      serverUrl: event.data.serverUrl ?? window.location.origin,
      accountId: event.data.accountId,
    })
    .then((result) => {
      window.postMessage(
        {
          type: "HAIXUN_THREADS_SYNC_RESULT",
          ...result,
        },
        "*"
      );
    })
    .catch((error) => {
      window.postMessage(
        {
          type: "HAIXUN_THREADS_SYNC_RESULT",
          success: false,
          valid: false,
          message: error instanceof Error ? error.message : "同步失敗",
        },
        "*"
      );
    });
});

window.postMessage({ type: "HAIXUN_EXTENSION_READY" }, "*");