/**
 * 路由模块 (Deno 版本)
 * 定义所有 API 路由
 */

import { Hono } from "hono";
import { cors } from "cors";
import { ConnectionManager } from "./websocket_manager.ts";
import { getMusicStatus, controlMusic } from "./apple_music.ts";
import { getLyricsData, searchLyrics, saveLyrics, deleteLyrics } from "./lyrics.ts";

export interface ControlRequest {
  action: "playpause" | "previous" | "next" | "seek";
  position?: number;
}

export interface SearchLyricsRequest {
  track_name: string;
  artist: string;
}

export interface GetLyricsFromIdRequest {
  title: string;
  artist: string;
}

export interface SaveLyricsRequest {
  track_name: string;
  artist: string;
  lyrics: string;
}

export interface DeleteLyricsRequest {
  track_name: string;
  artist: string;
}

/**
 * 注册所有路由
 */
export function registerRoutes(app: Hono, manager: ConnectionManager): void {
  // 添加中间件
  app.use("*", async (c, next) => {
    if (c.req.path !== "/ws") {
      console.log("[CORS middleware triggered]", c.req.method, c.req.path)
      return await cors({
        origin: "*",
        allowMethods: ["GET", "POST", "PUT", "DELETE", "OPTIONS"],
        allowHeaders: ["Content-Type", "Authorization"],
      })(c, next);
    } else {
      return await next();
    }
  });

  // 健康检查
  app.get("/health", (c) => {
    return c.json({
      status: "ok",
      timestamp: Date.now(),
      connections: manager.getConnectionCount(),
    });
  });

  // 获取音乐状态
  app.get("/music/status", async (c) => {
    try {
      const status = await getMusicStatus();
      return c.json(status);
    } catch (error) {
      return c.json({ status: "error", error: String(error) }, 500);
    }
  });

  // 控制音乐播放
  app.post("/music/control", async (c) => {
    try {
      const body = (await c.req.json()) as ControlRequest;

      if (!body.action) {
        return c.json({ status: "error", message: "缺少 action 参数" }, 400);
      }

      const result = await controlMusic(body.action, body.position);
      return c.json(result);
    } catch (error) {
      return c.json({ status: "error", message: String(error) }, 500);
    }
  });

  // 获取歌词
  app.get("/lyrics", async (c) => {
    try {
      const status = await getMusicStatus();
      const lyricsData = await getLyricsData(status);
      return c.json(lyricsData);
    } catch (error) {
      return c.json({ status: "error", error: String(error) }, 500);
    }
  });

  app.delete("/lyrics", async (c) => {
    try {
      const body = (await c.req.json()) as DeleteLyricsRequest;
      const { track_name, artist } = body;
      await deleteLyrics(track_name, artist);
      return c.json({ status: "success", message: "歌词删除成功" });
    } catch (error) {
      return c.json({ status: "error", error: String(error) }, 500);
    }
  });

  // 搜索歌词
  app.post("/lyrics/search", async (c) => {
    try {
      const body = (await c.req.json()) as SearchLyricsRequest;

      const { track_name, artist } = body;
      const lyricsData = await searchLyrics(track_name, artist);
      return c.json({
        status: "success",
        songs: [{
          name: track_name,
          artist: artist,
          lyrics: lyricsData,
        }],
        message: "歌词搜索成功",
      });
    } catch (error) {
      return c.json({ status: "error", error: String(error) }, 500);
    }
  });

  // 保存歌词
  app.post("/lyrics/save", async (c) => {
    try {
      const body = (await c.req.json()) as SaveLyricsRequest;
      const { track_name, artist, lyrics } = body;
      await saveLyrics(track_name, artist, lyrics, "search");
      return c.json({ status: "success", message: "歌词保存成功" });
    } catch (error) {
      return c.json({ status: "error", error: String(error) }, 500);
    }
  });

  // 根据歌曲信息获取歌词
  app.post("/lyrics/get", async (c) => {
    try {
      const body = (await c.req.json()) as GetLyricsFromIdRequest;

      if (!body.title) {
        return c.json({ status: "error", message: "缺少 title 参数" }, 400);
      }

      // 构造音乐状态对象
      const mockStatus = {
        status: "playing" as const,
        track_name: body.title,
        artist: body.artist || "",
        position: 0,
        duration: 0,
      };

      const lyricsData = await getLyricsData(mockStatus);
      return c.json(lyricsData);
    } catch (error) {
      return c.json({ status: "error", error: String(error) }, 500);
    }
  });

  // WebSocket 连接端点
  app.get("/ws", (c) => {
    const upgrade = c.req.header("upgrade");

    if (upgrade !== "websocket") {
      return c.text("Expected websocket", 400);
    }

    const { socket, response } = Deno.upgradeWebSocket(c.req.raw);
    const connectionId = `conn_${Date.now()}_${Math.random()
      .toString(36)
      .substr(2, 9)}`;

    // 添加连接到管理器
    manager.addConnection(connectionId, socket);

    return response;
  });

  // 404 处理
  app.notFound((c) => {
    return c.json({ status: "error", message: "Not Found" }, 404);
  });
}