import { browser } from "wxt/browser";
import { defineContentScript } from "wxt/utils/define-content-script";

import { syncDoubaoMonitoringRuntimeStateFromPage } from "../src/monitoring-adapters/doubao-state";

type PublisherRequestMessage = {
  source: "geo-admin";
  type: "geo.publisher.request";
  requestId: string;
  action: "ping" | "detectPlatforms" | "registerInstallation" | "bindAccount" | "publishArticle";
  payload?: unknown;
};

type MonitoringRequestMessage = {
  source: "geo-admin";
  type: "geo.monitoring.request";
  requestId: string;
  action: "ping" | "detectPlatforms" | "syncHeartbeat" | "runCycle" | "kickoffCycle" | "getState";
};

type BackgroundSuccessResponse = {
  ok: true;
  data: unknown;
};

type BackgroundErrorResponse = {
  ok: false;
  error?: string;
};

type RuntimeSyncMessage = {
  type: "geo.monitoring.runtime.sync";
  platform: "doubao";
};

function isExtensionContextInvalidatedError(error: unknown): boolean {
  const message =
    typeof error === "string"
      ? error
      : typeof error === "object" && error !== null && "message" in error && typeof error.message === "string"
        ? error.message
        : String(error ?? "");

  const normalized = message.toLowerCase();
  return normalized.includes("extension context invalidated") || normalized.includes("context invalidated");
}

function isBackgroundResponse(value: unknown): value is BackgroundSuccessResponse | BackgroundErrorResponse {
  return typeof value === "object" && value !== null && "ok" in value;
}

function registerDoubaoRuntimeSync(): void {
  const hostname = window.location.hostname;
  if (hostname !== "doubao.com" && hostname !== "www.doubao.com" && !hostname.endsWith(".doubao.com")) {
    return;
  }

  const sync = () => {
    void syncDoubaoMonitoringRuntimeStateFromPage().catch((error) => {
      if (isExtensionContextInvalidatedError(error)) {
        return;
      }
      console.warn("[geo-monitoring] failed to sync doubao runtime state", error);
    });
  };

  sync();

  window.addEventListener("pageshow", sync);
  document.addEventListener("visibilitychange", () => {
    if (!document.hidden) {
      sync();
    }
  });
  window.setInterval(sync, 15000);
}

export default defineContentScript({
  matches: ["http://*/*", "https://*/*"],
  main() {
    registerDoubaoRuntimeSync();

    browser.runtime.onMessage.addListener((message: RuntimeSyncMessage, _sender, sendResponse) => {
      if (!message || message.type !== "geo.monitoring.runtime.sync" || message.platform !== "doubao") {
        return undefined;
      }

      void syncDoubaoMonitoringRuntimeStateFromPage()
        .then(() => {
          sendResponse({ ok: true });
        })
        .catch((error) => {
          sendResponse({
            ok: false,
            error: error instanceof Error ? error.message : "monitoring_runtime_sync_failed",
          });
        });

      return true;
    });

    window.addEventListener("message", async (event: MessageEvent<PublisherRequestMessage | MonitoringRequestMessage>) => {
      if (
        event.source !== window ||
        !event.data ||
        (event.data.type !== "geo.publisher.request" && event.data.type !== "geo.monitoring.request")
      ) {
        return;
      }
      if (event.data.source !== "geo-admin") {
        return;
      }

      const { requestId, action } = event.data;
      const payload = "payload" in event.data ? event.data.payload : undefined;

      try {
        const response = await browser.runtime.sendMessage({
          type: event.data.type,
          action,
          payload,
        });

        const data = isBackgroundResponse(response)
          ? (() => {
              if (!response.ok) {
                throw new Error(response.error || "publisher_plugin_unknown_error");
              }
              return response.data;
            })()
          : response;

        if (typeof data === "undefined") {
          throw new Error("publisher_plugin_empty_response");
        }

        window.postMessage(
          {
            source: "geo-extension",
            type: event.data.type === "geo.publisher.request" ? "geo.publisher.response" : "geo.monitoring.response",
            requestId,
            success: true,
            data,
          },
          window.location.origin,
        );
      } catch (error) {
        window.postMessage(
          {
            source: "geo-extension",
            type: event.data.type === "geo.publisher.request" ? "geo.publisher.response" : "geo.monitoring.response",
            requestId,
            success: false,
            error: error instanceof Error ? error.message : "publisher_plugin_unknown_error",
          },
          window.location.origin,
        );
      }
    });
  },
});