import { _decorator, Component, JsonAsset, resources } from 'cc';
const { ccclass, property } = _decorator;

/**
 * 关卡配置数据结构
 */
interface LevelConfig {
    levelId: number;
    name: string;
    scene: string;
    description?: string;
    backgroundImage?: string; // 背景图片路径
    weapons: string[];
    waves: WaveConfig[];
    levelSettings?: {
        initialHealth?: number;
        timeLimit?: number;
        difficulty?: string;
        energyMax?: number;
        healthMultiplier?: number;
    };
}

/**
 * 波次配置数据结构
 */
interface WaveConfig {
    waveId: number;
    enemies: EnemyWaveConfig[];
}

/**
 * 敌人波次配置
 */
interface EnemyWaveConfig {
    enemyType: string;
    count: number;
    spawnInterval: number;
    characteristics: string[];
}

/**
 * 关卡JSON文件配置项
 */
@ccclass('LevelJsonConfig')
export class LevelJsonConfig {
    @property({
        tooltip: '关卡ID'
    })
    public levelId: number = 1;

    @property({
        tooltip: '关卡名称'
    })
    public levelName: string = '';

    @property({
        type: JsonAsset,
        tooltip: '关卡配置JSON文件'
    })
    public configFile: JsonAsset = null;
}

/**
 * 关卡配置管理器
 * 让策划在编辑器中配置所有关卡的JSON文件
 */
@ccclass('LevelConfigManager')
export class LevelConfigManager extends Component {
    private static instance: LevelConfigManager = null;

    @property({
        tooltip: '总关卡数量'
    })
    public totalLevels: number = 5;

    @property({
        type: [LevelJsonConfig],
        tooltip: '关卡配置列表（拖入对应的JSON文件）'
    })
    public levelConfigs: LevelJsonConfig[] = [];

    // 缓存已加载的关卡配置
    private loadedConfigs: Map<number, LevelConfig> = new Map();

    onLoad() {
        if (LevelConfigManager.instance === null) {
            LevelConfigManager.instance = this;
            this.validateConfigs();
        } else if (LevelConfigManager.instance !== this) {
            this.destroy();
            return;
        }
    }

    onDestroy() {
        if (LevelConfigManager.instance === this) {
            LevelConfigManager.instance = null;
        }
    }

    public static getInstance(): LevelConfigManager {
        return LevelConfigManager.instance;
    }

    /**
     * 验证关卡配置的完整性
     */
    private validateConfigs() {
        // 检查是否所有关卡都有配置
        for (let i = 1; i <= this.totalLevels; i++) {
            const config = this.levelConfigs.find(c => c.levelId === i);
            if (!config) {
                console.warn(`关卡 ${i} 缺少配置`);
            } else if (!config.configFile) {
                console.warn(`关卡 ${i} 缺少JSON文件`);
            }
        }

        // 检查是否有重复的关卡ID
        const levelIds = this.levelConfigs.map(c => c.levelId);
        const duplicates = levelIds.filter((id, index) => levelIds.indexOf(id) !== index);
        if (duplicates.length > 0) {
            console.error(`发现重复的关卡ID: ${duplicates.join(', ')}`);
        }
    }

    /**
     * 获取关卡配置
     */
    public async getLevelConfig(levelId: number): Promise<LevelConfig | null> {
        // 先从缓存中查找
        if (this.loadedConfigs.has(levelId)) {
            return this.loadedConfigs.get(levelId);
        }

        // 查找对应的配置项
        const configItem = this.levelConfigs.find(c => c.levelId === levelId);
        if (!configItem || !configItem.configFile) {
            console.error(`关卡 ${levelId} 配置不存在或缺少JSON文件`);
            return null;
        }

        try {
            // 解析JSON数据
            const jsonData = configItem.configFile.json;
            if (!jsonData) {
                console.error(`关卡 ${levelId} JSON文件解析失败`);
                return null;
            }

            // 验证JSON数据结构
            const levelConfig = this.validateLevelConfigData(jsonData, levelId);
            if (levelConfig) {
                // 缓存配置
                this.loadedConfigs.set(levelId, levelConfig);
                return levelConfig;
            }

        } catch (error) {
            console.error(`关卡 ${levelId} 配置加载失败:`, error);
        }

        return null;
    }

    /**
     * 验证关卡配置数据结构
     */
    private validateLevelConfigData(jsonData: any, levelId: number): LevelConfig | null {
        try {
            // 基本字段验证
            const weapons = jsonData.weapons || jsonData.availableWeapons;
            if (!jsonData.name || !jsonData.scene || !weapons) {
                console.error(`关卡 ${levelId} JSON数据缺少必要字段`);
                if (!jsonData.name) console.error(`  缺少字段: name`);
                if (!jsonData.scene) console.error(`  缺少字段: scene`);
                if (!weapons) console.error(`  缺少字段: weapons 或 availableWeapons`);
                return null;
            }

            // 检查武器列表是否为空
            if (!Array.isArray(weapons) || weapons.length === 0) {
                console.error(`关卡 ${levelId} 没有配置武器列表`);
                return null;
            }

            // 构建关卡配置对象
            const levelConfig: LevelConfig = {
                levelId: levelId,
                name: jsonData.name,
                scene: jsonData.scene,
                description: jsonData.description,
                backgroundImage: jsonData.backgroundImage, // 添加背景图片字段
                weapons: weapons,
                waves: [],
                levelSettings: {
                    timeLimit: jsonData.timeLimit,
                    difficulty: jsonData.difficulty,
                    healthMultiplier: jsonData.healthMultiplier,
                    ...jsonData.levelSettings
                }
            };

            // 验证波次配置
            if (Array.isArray(jsonData.waves)) {
                for (const waveData of jsonData.waves) {
                    const wave: WaveConfig = {
                        waveId: waveData.waveId || 0,
                        enemies: []
                    };

                    if (Array.isArray(waveData.enemies)) {
                        for (const enemyData of waveData.enemies) {
                            const enemy: EnemyWaveConfig = {
                                enemyType: enemyData.enemyType || '',
                                count: enemyData.count || 1,
                                spawnInterval: enemyData.spawnInterval || 5,
                                characteristics: enemyData.characteristics || []
                            };
                            wave.enemies.push(enemy);
                        }
                    }

                    levelConfig.waves.push(wave);
                }
            }

            return levelConfig;

        } catch (error) {
            console.error(`关卡 ${levelId} 数据验证失败:`, error);
            return null;
        }
    }

    /**
     * 获取所有可用关卡ID列表
     */
    public getAvailableLevels(): number[] {
        return this.levelConfigs
            .filter(config => config.configFile !== null)
            .map(config => config.levelId)
            .sort((a, b) => a - b);
    }

    /**
     * 获取关卡名称
     */
    public getLevelName(levelId: number): string {
        const config = this.levelConfigs.find(c => c.levelId === levelId);
        return config ? config.levelName : `关卡 ${levelId}`;
    }

    /**
     * 检查关卡是否已配置
     */
    public isLevelConfigured(levelId: number): boolean {
        const config = this.levelConfigs.find(c => c.levelId === levelId);
        return config !== undefined && config.configFile !== null;
    }

    /**
     * 获取总关卡数
     */
    public getTotalLevels(): number {
        return this.totalLevels;
    }

    /**
     * 重新加载所有关卡配置（开发调试用）
     */
    public reloadAllConfigs() {
        this.loadedConfigs.clear();
        this.validateConfigs();
    }

    /**
     * 创建示例关卡配置（开发辅助）
     */
    public generateSampleConfig(levelId: number): LevelConfig {
        const samples = {
            1: {
                name: '新手引导（草地平原）',
                scene: 'grassland',
                backgroundImage: 'images/LevelBackground/BG1',
                weapons: ['毛豆射手', '尖胡萝卜'],
                waves: [
                    {
                        waveId: 1,
                        enemies: [
                            { enemyType: '普通僵尸', count: 8, spawnInterval: 5, characteristics: ['中速移动', '无技能'] }
                        ]
                    },
                    {
                        waveId: 2,
                        enemies: [
                            { enemyType: '普通僵尸', count: 10, spawnInterval: 5, characteristics: ['中速移动', '无技能'] }
                        ]
                    },
                    {
                        waveId: 3,
                        enemies: [
                            { enemyType: '路障僵尸', count: 5, spawnInterval: 6, characteristics: ['高生命', '慢速移动'] }
                        ]
                    }
                ]
            },
            2: {
                name: '丛林探险（森林场景）',
                scene: 'forest',
                backgroundImage: 'images/LevelBackground/BG2',
                weapons: ['锯齿草', '西瓜炸弹', '毛豆射手'],
                waves: [
                    {
                        waveId: 1,
                        enemies: [
                            { enemyType: '普通僵尸', count: 10, spawnInterval: 4, characteristics: ['中速移动', '无技能'] }
                        ]
                    },
                    {
                        waveId: 2,
                        enemies: [
                            { enemyType: '漫步僵尸', count: 6, spawnInterval: 5, characteristics: ['左右摇摆', '近战范围大'] }
                        ]
                    }
                ]
            }
        };

        return samples[levelId] || samples[1];
    }

    /**
     * 调试：打印所有关卡配置信息
     */
    public debugPrintAllConfigs() {
        console.log(`=== 所有关卡配置信息 ===`);
        console.log(`总关卡数: ${this.totalLevels}`);
        
        for (const config of this.levelConfigs) {
            console.log(`关卡 ${config.levelId}: ${config.levelName}`);
            console.log(`  JSON文件: ${config.configFile ? config.configFile.name : '未设置'}`);
        }
    }
}