import React, { useState, useEffect } from "react";
import { useLocation } from "react-router-dom";
import { mockData } from "@/data/mockData";
import VideoPlayer from "@/components/VideoPlayer";
import CourseList from "./components/CourseList";
import LiveInfo from "./components/LiveInfo";
import StageProgress from "@/components/StageProgress";
import "./index.css";

const LivePage = () => {
  // 从mockData获取数据
  const { courseUnits, currentLive, liveConfig } = mockData;
  const location = useLocation();

  // 状态管理
  const [currentCourse, setCurrentCourse] = useState(currentLive);
  const [isFullscreen, setIsFullscreen] = useState(false);

  // 处理从Dashboard传递的课程参数
  useEffect(() => {
    if (location.state?.courseId) {
      // 在courseUnits中查找对应的课程
      let targetCourse = null;
      for (const unit of courseUnits) {
        const foundCourse = unit.courses.find(
          (course) => course.id === location.state.courseId
        );
        if (foundCourse) {
          targetCourse = foundCourse;
          break;
        }
      }

      if (targetCourse) {
        // 创建新的直播信息对象
        const newLiveInfo = {
          courseId: targetCourse.id,
          title: targetCourse.title,
          teacher: targetCourse.teacher,
          startTime: targetCourse.startTime,
          endTime: targetCourse.endTime,
          viewers: targetCourse.viewCount,
          description: targetCourse.description,
          status: targetCourse.status,
          duration: "1小时30分钟",
        };
        setCurrentCourse(newLiveInfo);
      } else {
        // No course found
      }
    }
  }, [location.state, courseUnits]);

  // 处理课程选择
  const handleCourseSelect = (course) => {
    // 创建新的直播信息对象，包含完整的课程信息
    const newLiveInfo = {
      courseId: course.id,
      title: course.title,
      teacher: course.teacher,
      startTime:
        course.startTime ||
        `${course.date.replace(/\./g, "-")} ${course.time.split("-")[0]}`,
      endTime: course.endTime,
      viewers: course.viewCount,
      description: course.description,
      status: course.status,
      duration: "1小时30分钟",
    };

    setCurrentCourse(newLiveInfo);
  };

  // 处理全屏状态变化
  const handleFullscreenChange = (fullscreen) => {
    setIsFullscreen(fullscreen);
  };

  // 处理回放请求
  const handleReplayRequest = () => {
    if (currentCourse) {
      // 创建回放状态的课程信息
      const replayLiveInfo = {
        ...currentCourse,
        status: "replay",
      };
      setCurrentCourse(replayLiveInfo);
    }
  };

  return (
    <div className={`live-page ${isFullscreen ? "fullscreen" : ""}`}>
      {/* 学习阶段进度条 - 与首页保持一致（仅非全屏时显示，不显示阻塞警示） */}
      {!isFullscreen && <StageProgress />}

      {/* 直播主要内容区域 */}
      <div className="live-main-content">
        {/* 左侧区域：视频 + 老师信息 */}
        <div className="left-section">
          {/* 视频区域 */}
          <div className="video-area">
            {/* 视频标题栏 */}
            <div className="video-title-bar">
              <h1 className="course-title">
                {currentCourse?.title || "课程直播间"}
              </h1>
              <div className="course-status-info">
                <div
                  className={`status-indicator ${
                    currentCourse?.status || "offline"
                  }`}
                >
                  <span className="status-dot"></span>
                  {liveConfig?.statusTypes?.[currentCourse?.status]?.name ||
                    "离线"}
                </div>
                {currentCourse?.viewers > 0 && (
                  <div className="viewer-count">
                    👁 {currentCourse.viewers}人观看
                  </div>
                )}
              </div>
            </div>

            {/* 视频播放器容器 */}
            <div className="video-container">
              <VideoPlayer
                title={currentCourse?.title}
                isLive={currentCourse?.status === "live"}
                courseStatus={currentCourse?.status}
                startTime={currentCourse?.startTime}
                endTime={currentCourse?.endTime}
                onReplayRequest={handleReplayRequest}
                onFullscreenChange={handleFullscreenChange}
              />
            </div>
          </div>

          {/* 老师信息区域（仅非全屏时显示） */}
          {!isFullscreen && (
            <div className="teacher-section">
              <LiveInfo liveInfo={currentCourse} statusConfig={liveConfig} />
            </div>
          )}
        </div>

        {/* 右侧区域：课程列表（仅非全屏时显示） */}
        {!isFullscreen && (
          <div className="right-section">
            <CourseList
              courseUnits={courseUnits}
              currentCourseId={currentCourse?.courseId}
              onCourseSelect={handleCourseSelect}
              statusConfig={liveConfig}
            />
          </div>
        )}
      </div>
    </div>
  );
};

export default LivePage;