/**
 * 数据管理器 - 管理课程和游戏数据
 */
class DataManager {
    constructor() {
        this.courses = [];
        this.games = [];
        this.courseGames = new Map();
        this.isDataLoaded = false;
    }

    /**
     * 从后端加载数据
     */
    async loadDataFromBackend() {
        try {
            console.log('正在从后端加载数据...');
            const result = await window.apiService.getCompleteData();
            
            if (result.data) {
                this.courses = result.data.courses || [];
                this.games = result.data.games || [];
                this.courseGames = new Map(Object.entries(result.data.courseGames || {}));
                this.isDataLoaded = true;
                
                console.log('数据加载成功:', {
                    courses: this.courses.length,
                    games: this.games.length,
                    courseGames: this.courseGames.size
                });
                
                // 更新全局配置
                this.updateGlobalConfig();
            }
        } catch (error) {
            console.error('从后端加载数据失败:', error);
            // 如果后端加载失败，使用本地数据
            this.loadLocalData();
        }
    }

    /**
     * 加载本地数据（备用方案）
     */
    loadLocalData() {
        console.log('使用本地数据...');
        if (window.GLOBAL_CONFIG) {
            this.courses = this.extractCoursesFromConfig(window.GLOBAL_CONFIG);
            this.games = this.extractGamesFromConfig(window.GLOBAL_CONFIG);
            this.buildCourseGamesMapping();
            this.isDataLoaded = true;
        }
    }

    /**
     * 从全局配置中提取课程数据
     */
    extractCoursesFromConfig(config) {
        const courses = [];
        const { classObject } = config;
        
        Object.entries(classObject).forEach(([category, coursesData]) => {
            Object.entries(coursesData).forEach(([courseId, courseData]) => {
                const course = {
                    courseId: courseId,
                    categoryId: this.getCategoryId(category),
                    title: courseData.title,
                    description: courseData.courseVideo?.title || '',
                    gradeLevel: this.extractGradeLevel(courseId),
                    semester: this.extractSemester(courseId),
                    courseVideoSrc: courseData.courseVideo?.src || '',
                    courseVideoTitle: courseData.courseVideo?.title || '',
                    thankName: courseData.thank?.name || '',
                    isActive: 1
                };
                courses.push(course);
            });
        });
        
        return courses;
    }

    /**
     * 从全局配置中提取游戏数据
     */
    extractGamesFromConfig(config) {
        const games = [];
        const { classObject } = config;
        
        Object.entries(classObject).forEach(([category, coursesData]) => {
            Object.entries(coursesData).forEach(([courseId, courseData]) => {
                if (courseData.play && Array.isArray(courseData.play)) {
                    courseData.play.forEach((game, index) => {
                        const gameData = {
                            courseId: this.getCourseIdByCourseId(courseId),
                            gameTitle: game.title,
                            gameUrl: game.url,
                            gameType: 'play',
                            categoryId: this.getCategoryId(category),
                            isActive: 1
                        };
                        games.push(gameData);
                    });
                }
            });
        });
        
        return games;
    }

    /**
     * 构建课程-游戏映射
     */
    buildCourseGamesMapping() {
        this.courseGames.clear();
        this.games.forEach(game => {
            if (game.courseId) {
                if (!this.courseGames.has(game.courseId)) {
                    this.courseGames.set(game.courseId, []);
                }
                this.courseGames.get(game.courseId).push(game);
            }
        });
    }

    /**
     * 更新全局配置
     */
    updateGlobalConfig() {
        if (window.GLOBAL_CONFIG) {
            // 更新课程列表
            this.updateCourseList();
            // 更新游戏列表
            this.updateGameList();
        }
    }

    /**
     * 更新课程列表
     */
    updateCourseList() {
        if (!window.GLOBAL_CONFIG) return;
        
        const { courseList } = window.GLOBAL_CONFIG;
        
        // 按分类组织课程
        const coursesByCategory = {
            live: [],
            language: [],
            math: []
        };
        
        this.courses.forEach(course => {
            const category = this.getCategoryName(course.categoryId);
            if (coursesByCategory[category]) {
                coursesByCategory[category].push({
                    id: course.courseId,
                    name: course.courseVideoTitle,
                    des: course.description
                });
            }
        });
        
        // 更新全局配置
        Object.keys(courseList).forEach(category => {
            if (coursesByCategory[category]) {
                // 这里可以根据年级和学期进一步组织
                courseList[category].forEach(gradeArray => {
                    gradeArray.forEach(semesterArray => {
                        semesterArray.length = 0; // 清空现有数据
                        semesterArray.push(...coursesByCategory[category]);
                    });
                });
            }
        });
    }

    /**
     * 更新游戏列表
     */
    updateGameList() {
        if (!window.GLOBAL_CONFIG) return;
        
        const { playList } = window.GLOBAL_CONFIG;
        
        // 按分类组织游戏
        const gamesByCategory = {
            live: [],
            language: [],
            math: []
        };
        
        this.games.forEach(game => {
            const category = this.getCategoryName(game.categoryId);
            if (gamesByCategory[category]) {
                gamesByCategory[category].push({
                    title: game.gameTitle,
                    url: game.gameUrl
                });
            }
        });
        
        // 更新全局配置
        Object.keys(playList).forEach(category => {
            if (gamesByCategory[category]) {
                playList[category] = gamesByCategory[category];
            }
        });
    }

    /**
     * 获取分类ID
     */
    getCategoryId(categoryName) {
        const categoryMap = {
            'live': 1,
            'language': 2,
            'math': 3
        };
        return categoryMap[categoryName] || 1;
    }

    /**
     * 获取分类名称
     */
    getCategoryName(categoryId) {
        const categoryMap = {
            1: 'live',
            2: 'language',
            3: 'math'
        };
        return categoryMap[categoryId] || 'live';
    }

    /**
     * 提取年级信息
     */
    extractGradeLevel(courseId) {
        // 从课程ID中提取年级信息
        if (courseId.includes('1')) return 1;
        if (courseId.includes('2')) return 2;
        if (courseId.includes('3')) return 3;
        return 1;
    }

    /**
     * 提取学期信息
     */
    extractSemester(courseId) {
        // 从课程ID中提取学期信息
        if (courseId.includes('x')) return '下';
        return '上';
    }

    /**
     * 根据课程ID获取数据库ID
     */
    getCourseIdByCourseId(courseId) {
        const course = this.courses.find(c => c.courseId === courseId);
        return course ? course.id : null;
    }

    /**
     * 根据课程ID获取课程
     */
    getCourseByCourseId(courseId) {
        return this.courses.find(c => c.courseId === courseId);
    }

    /**
     * 根据课程ID获取游戏列表
     */
    getGamesByCourseId(courseId) {
        const course = this.getCourseByCourseId(courseId);
        if (course && this.courseGames.has(course.id)) {
            return this.courseGames.get(course.id);
        }
        return [];
    }

    /**
     * 根据游戏标题获取游戏
     */
    getGameByTitle(gameTitle) {
        return this.games.find(g => g.gameTitle === gameTitle);
    }

    /**
     * 初始化数据
     */
    async init() {
        if (!this.isDataLoaded) {
            await this.loadDataFromBackend();
        }
    }

    /**
     * 获取所有课程
     */
    getAllCourses() {
        return this.courses;
    }

    /**
     * 获取所有游戏
     */
    getAllGames() {
        return this.games;
    }

    /**
     * 检查数据是否已加载
     */
    isLoaded() {
        return this.isDataLoaded;
    }
}

// 创建全局数据管理器实例
window.dataManager = new DataManager();