"use client";

import { useEffect, useState, useCallback } from "react";
import { useSession } from "next-auth/react";
import { useRouter } from "next/navigation";
import Header from "@/components/Header";
import AudioRecorder from "@/components/AudioRecorder";
import RecordingList from "@/components/RecordingList";
import LoadingSpinner from "@/components/LoadingSpinner";

interface Recording {
  id: string;
  title: string;
  duration: number;
  createdAt: string;
  audioUrl: string;
}

export default function DashboardPage() {
  const { data: session, status } = useSession();
  const router = useRouter();
  const [recordings, setRecordings] = useState<Recording[]>([]);
  const [isLoading, setIsLoading] = useState(true);

  // 处理录音更新
  const handleRecordingUpdated = useCallback((updatedRecording: Recording) => {
    setRecordings((prevRecordings) =>
      prevRecordings.map((recording) =>
        recording.id === updatedRecording.id ? updatedRecording : recording
      )
    );
  }, []);

  // 获取录音列表
  const fetchRecordings = useCallback(async () => {
    try {
      const response = await fetch("/api/recordings");
      if (response.ok) {
        const result = await response.json();
        if (result.success && Array.isArray(result.data)) {
          setRecordings(result.data);
        } else {
          console.error("API 返回数据格式错误:", result);
          setRecordings([]);
        }
      } else {
        console.error("获取录音列表失败:", response.status);
        setRecordings([]);
      }
    } catch (error) {
      console.error("获取录音列表失败:", error);
      setRecordings([]);
    } finally {
      setIsLoading(false);
    }
  }, []);

  // 监听录音上传和删除事件
  useEffect(() => {
    const handleRecordingUploaded = () => {
      // 延迟一点时间确保服务器处理完成
      setTimeout(() => {
        fetchRecordings();
      }, 500);
    };

    const handleRecordingDeleted = () => {
      // 延迟一点时间确保服务器处理完成
      setTimeout(() => {
        fetchRecordings();
      }, 500);
    };

    const handleRecordingRenamed = () => {
      // 立即清除可能的缓存
      // 延迟一点时间确保服务器处理完成
      setTimeout(() => {
        fetchRecordings();
      }, 100); // 减少延迟时间
    };

    window.addEventListener("recording-uploaded", handleRecordingUploaded);
    window.addEventListener("recording-deleted", handleRecordingDeleted);
    window.addEventListener("recording-renamed", handleRecordingRenamed);

    return () => {
      window.removeEventListener("recording-uploaded", handleRecordingUploaded);
      window.removeEventListener("recording-deleted", handleRecordingDeleted);
      window.removeEventListener("recording-renamed", handleRecordingRenamed);
    };
  }, [fetchRecordings]);

  // 初始加载录音列表
  useEffect(() => {
    if (status === "authenticated") {
      fetchRecordings();
    }
  }, [status]);

  // 检查认证状态
  if (status === "loading") {
    return (
      <div className="flex justify-center items-center min-h-screen">
        <LoadingSpinner size="lg" color="blue" text="加载中..." />
      </div>
    );
  }

  if (status === "unauthenticated") {
    router.push("/login");
    return null;
  }

  if (!session?.user) {
    return null;
  }

  return (
    <div className="min-h-screen bg-gray-50 dark:bg-gray-900">
      <Header />

      <main className="container mx-auto p-4 md:p-8 max-w-6xl">
        <div className="mb-12">
          <h2 className="text-3xl md:text-4xl font-bold text-gray-900 dark:text-white mb-4">
            你好, {session.user.name || session.user.email}!
          </h2>
          <p className="text-gray-600 dark:text-gray-400 text-lg">
            准备好录制你的下一个杰作了吗？点击下方按钮开始。
          </p>
        </div>

        <div className="mb-16">
          <AudioRecorder />
        </div>

        <div>
          <div className="flex justify-between items-center mb-6">
            <h3 className="text-2xl md:text-3xl font-semibold text-gray-900 dark:text-white">
              我的录音
            </h3>
            <button
              onClick={fetchRecordings}
              className="px-4 py-2 bg-blue-500 text-white rounded-lg hover:bg-blue-600 transition-colors"
            >
              刷新列表
            </button>
          </div>
          {isLoading ? (
            <div className="text-center py-12">
              <LoadingSpinner size="lg" color="blue" text="加载录音中..." />
            </div>
          ) : (
            <RecordingList recordings={recordings} />
          )}
        </div>
      </main>
    </div>
  );
}