// 表情库系统
const ExpressionLibrary = {
    expressions: {
        // 原有表情
        smile: {
            name: '微笑',
            blendShapes: {
                mouthsmileleft: 0.4,
                mouthsmileright: 0.4
            },
            duration: 2000
        },

        disgust: {
            name: '嫌弃',
            blendShapes: {
                mouthupperupright: 0.43,
                browdownleft: 1,
                browdownright: 1,
                nosesneerleft: 1,
                nosesneerright: 1
            },
            duration: 2500
        },

        smirk: {
            name: '冷笑',
            blendShapes: {
                eyeblinkleft: 0.41,
                eyeblinkright: 0.41,
                mouthsmileleft: 0.3
            },
            duration: 2000
        },

        grit: {
            name: '咬牙切齿',
            blendShapes: {
                mouthrolllower: 0.3,
                mouthrollupper: 0.44,
                mouthshruglower: 0.42,
                mouthshrugupper: 0.44,
                browdownleft: 1,
                browdownright: 1,
                nosesneerleft: 1,
                nosesneerright: 1
            },
            duration: 2500
        },

        // 新增表情
        surprise: {
            name: '惊讶',
            blendShapes: {
                eyewidenleft: 0.8,
                eyewidenright: 0.8,
                browouterupright: 0.7,
                browouterupleft: 0.7,
                jawopen: 0.4,
                mouthfunnel: 0.3
            },
            duration: 2000
        },

        sad: {
            name: '悲伤',
            blendShapes: {
                browinnerup: 0.8,
                mouthfrownleft: 0.6,
                mouthfrownright: 0.6,
                mouthlowerdownleft: 0.4,
                mouthlowerdownright: 0.4
            },
            duration: 3000
        },

        angry: {
            name: '生气',
            blendShapes: {
                browdownleft: 1,
                browdownright: 1,
                eyesquintleft: 0.5,
                eyesquintright: 0.5,
                nosesneerleft: 0.7,
                nosesneerright: 0.7,
                mouthpressleft: 0.6,
                mouthpressright: 0.6
            },
            duration: 2500
        },

        thinking: {
            name: '思考',
            blendShapes: {
                eyesquintleft: 0.3,
                eyesquintright: 0.3,
                mouthpucker: 0.4,
                eyelookupleft: 0.3,
                eyelookupright: 0.3
            },
            duration: 3000
        },

        happy: {
            name: '开心',
            blendShapes: {
                mouthsmileleft: 0.8,
                mouthsmileright: 0.8,
                eyesquintleft: 0.4,
                eyesquintright: 0.4,
                cheeksquintleft: 0.6,
                cheeksquintright: 0.6
            },
            duration: 2500
        },

        confused: {
            name: '困惑',
            blendShapes: {
                browouterupleft: 0.6,
                browdownright: 0.5,
                mouthfrownleft: 0.3,
                eyesquintright: 0.3
            },
            duration: 2500
        }
    },

    // 随机表情播放器
    randomPlayer: {
        enabled: false,
        timeout: null,
        currentExpression: null,
        lastExpressionKey: null,
        intervalMin: 3000,
        intervalMax: 8000,

        start: function() {
            this.enabled = true;
            this.scheduleNext();
        },

        stop: function() {
            this.enabled = false;
            if (this.timeout) {
                clearTimeout(this.timeout);
                this.timeout = null;
            }
            this.reset();
        },

        scheduleNext: function() {
            if (!this.enabled) return;

            const delay = this.intervalMin + Math.random() * (this.intervalMax - this.intervalMin);
            this.timeout = setTimeout(() => {
                this.playRandom();
            }, delay);
        },

        playRandom: function() {
            if (!this.enabled) return;

            // 获取启用的表情列表
            const enabledKeys = window.enabledExpressions && window.enabledExpressions.size > 0
                ? Array.from(window.enabledExpressions)
                : Object.keys(ExpressionLibrary.expressions);

            if (enabledKeys.length === 0) {
                this.scheduleNext();
                return;
            }

            const availableKeys = enabledKeys.length > 1 && this.lastExpressionKey
                ? enabledKeys.filter(key => key !== this.lastExpressionKey)
                : enabledKeys;
            const randomKey = availableKeys[Math.floor(Math.random() * availableKeys.length)];
            const expression = ExpressionLibrary.expressions[randomKey];

            this.play(expression);
        },

        play: function(expression) {
            this.currentExpression = expression;
            this.lastExpressionKey = Object.keys(ExpressionLibrary.expressions).find(
                key => ExpressionLibrary.expressions[key] === expression
            );

            // 从主页面获取动画速度参数
            const speed = window.expressionParams?.speed || 400;

            // 应用表情
            for (const [name, value] of Object.entries(expression.blendShapes)) {
                if (window.setIdleAnimation) {
                    window.setIdleAnimation(name, value, speed, 'easeInOutCubic');
                }
            }

            // 使用用户设置的持续时间，如果没有则使用表情默认时间
            const duration = (window.expressionDurations && window.expressionDurations[this.lastExpressionKey])
                || expression.duration;

            setTimeout(() => {
                this.reset();
                if (!this.enabled) return;
                this.scheduleNext();
            }, duration);
        },

        reset: function() {
            if (!this.currentExpression) return;

            // 从主页面获取参数
            const speed = window.expressionParams?.speed || 400;

            // 重置表情
            for (const name of Object.keys(this.currentExpression.blendShapes)) {
                if (window.setIdleAnimation) {
                    window.setIdleAnimation(name, 0, speed + 100, 'easeInOutCubic');
                }
            }

            this.currentExpression = null;
        }
    },

    // 手动播放指定表情
    playExpression: function(expressionName) {
        const expression = this.expressions[expressionName];
        if (!expression) {
            console.warn(`表情 "${expressionName}" 不存在`);
            return;
        }

        this.randomPlayer.play(expression);
    },

    // 获取所有表情名称
    getExpressionNames: function() {
        return Object.keys(this.expressions).map(key => ({
            key: key,
            name: this.expressions[key].name
        }));
    }
};

// 导出到全局
if (typeof window !== 'undefined') {
    window.ExpressionLibrary = ExpressionLibrary;
}