// 微信小程序AI对话生成与智能内容审核系统
class WXAIContentSystem {
    constructor() {
        // AI模型配置
        this.aiModels = {
            dialogue: new AIDialogueModel(),
            content: new AIContentGenerator(),
            moderation: new AIModerationSystem(),
            translation: new AITranslationModel()
        };

        // 内容数据库
        this.contentDB = new ContentDatabase();
        
        // 用户行为分析
        this.userAnalytics = new UserBehaviorAnalytics();
        
        // 实时通信系统
        this.realtimeSystem = new RealtimeCommunication();
        
        // 系统状态
        this.systemStatus = {
            isInitialized: false,
            aiServices: {},
            lastHealthCheck: null,
            errorCount: 0
        };

        // 初始化系统
        this.initializeSystem();
    }

    // 初始化系统
    async initializeSystem() {
        try {
            console.log('正在初始化AI内容系统...');
            
            // 加载AI模型
            await this.loadAIModels();
            
            // 初始化数据库
            await this.contentDB.initialize();
            
            // 启动健康监控
            this.startHealthMonitoring();
            
            // 启动实时服务
            await this.realtimeSystem.start();
            
            this.systemStatus.isInitialized = true;
            console.log('AI内容系统初始化完成');
            
        } catch (error) {
            console.error('系统初始化失败:', error);
            this.systemStatus.errorCount++;
            setTimeout(() => this.initializeSystem(), 5000);
        }
    }

    // 加载AI模型
    async loadAIModels() {
        const modelPromises = [
            this.aiModels.dialogue.loadModel('dialogue-v2'),
            this.aiModels.content.loadModel('content-gen-v1'),
            this.aiModels.moderation.loadModel('moderation-v3'),
            this.aiModels.translation.loadModel('translation-v2')
        ];

        const results = await Promise.allSettled(modelPromises);
        
        results.forEach((result, index) => {
            const modelNames = ['dialogue', 'content', 'moderation', 'translation'];
            if (result.status === 'fulfilled') {
                this.systemStatus.aiServices[modelNames[index]] = 'active';
            } else {
                this.systemStatus.aiServices[modelNames[index]] = 'error';
                console.warn(`${modelNames[index]}模型加载失败:`, result.reason);
            }
        });
    }

    // 生成智能对话
    async generateDialogue(context, options = {}) {
        this.validateSystemStatus();
        
        const {
            userId,
            sessionId = this.generateSessionId(),
            tone = 'friendly',
            maxLength = 100,
            language = 'zh-CN',
            creativity = 0.7
        } = options;

        try {
            // 准备对话上下文
            const dialogueContext = await this.prepareDialogueContext(context, userId, sessionId);
            
            // 生成对话响应
            const rawResponse = await this.aiModels.dialogue.generate({
                context: dialogueContext,
                tone,
                maxLength,
                creativity
            });

            // 内容审核
            const moderationResult = await this.moderateContent(rawResponse, {
                type: 'dialogue',
                userId,
                sessionId
            });

            if (!moderationResult.approved) {
                throw new Error(`内容未通过审核: ${moderationResult.reasons.join(', ')}`);
            }

            // 语言处理(如果需要翻译)
            let finalResponse = rawResponse;
            if (language !== 'zh-CN') {
                finalResponse = await this.aiModels.translation.translate(
                    rawResponse, 
                    'zh-CN', 
                    language
                );
            }

            // 记录生成内容
            await this.contentDB.recordDialogue({
                userId,
                sessionId,
                context,
                response: finalResponse,
                rawResponse,
                moderationResult,
                metadata: {
                    tone,
                    language,
                    creativity,
                    timestamp: new Date()
                }
            });

            // 更新用户行为分析
            await this.userAnalytics.recordInteraction({
                userId,
                type: 'dialogue_generation',
                success: true,
                metadata: options
            });

            return {
                success: true,
                response: finalResponse,
                sessionId,
                moderation: moderationResult,
                metadata: {
                    responseTime: Date.now() - dialogueContext.startTime,
                    model: 'dialogue-v2'
                }
            };

        } catch (error) {
            await this.handleGenerationError(error, 'dialogue', { userId, context });
            throw error;
        }
    }

    // 生成智能内容
    async generateContent(prompt, options = {}) {
        this.validateSystemStatus();
        
        const {
            contentType = 'article',
            length = 'medium',
            style = 'professional',
            targetAudience = 'general',
            language = 'zh-CN'
        } = options;

        try {
            // 内容生成
            const generatedContent = await this.aiModels.content.generate({
                prompt,
                contentType,
                length,
                style,
                targetAudience
            });

            // 内容审核
            const moderationResult = await this.moderateContent(generatedContent, {
                type: contentType,
                context: prompt
            });

            if (!moderationResult.approved) {
                throw new Error(`内容未通过审核: ${moderationResult.reasons.join(', ')}`);
            }

            // 语言处理
            let finalContent = generatedContent;
            if (language !== 'zh-CN') {
                finalContent = await this.aiModels.translation.translate(
                    generatedContent, 
                    'zh-CN', 
                    language
                );
            }

            // 优化和格式化
            const optimizedContent = await this.optimizeContent(finalContent, contentType);

            // 记录生成内容
            await this.contentDB.recordContentGeneration({
                prompt,
                generatedContent: optimizedContent,
                rawContent: generatedContent,
                contentType,
                moderationResult,
                metadata: options
            });

            return {
                success: true,
                content: optimizedContent,
                contentType,
                moderation: moderationResult,
                wordCount: this.countWords(optimizedContent),
                readabilityScore: this.calculateReadability(optimizedContent)
            };

        } catch (error) {
            await this.handleGenerationError(error, 'content', { prompt, options });
            throw error;
        }
    }

    // 内容审核
    async moderateContent(content, context = {}) {
        try {
            const moderationResult = await this.aiModels.moderation.analyze(content, context);
            
            // 记录审核结果
            await this.contentDB.recordModeration({
                content,
                result: moderationResult,
                context
            });

            return moderationResult;

        } catch (error) {
            console.error('内容审核失败:', error);
            
            // 审核失败时的安全策略
            return {
                approved: false,
                confidence: 0,
                reasons: ['审核系统暂时不可用'],
                categories: ['system_error'],
                safe: false
            };
        }
    }

    // 实时对话会话
    async startConversationSession(userId, initialContext = {}) {
        const sessionId = this.generateSessionId();
        
        // 初始化会话
        const session = {
            sessionId,
            userId,
            startTime: new Date(),
            messageHistory: [],
            context: initialContext,
            status: 'active'
        };

        // 存储会话
        await this.contentDB.createSession(session);
        
        // 加入实时通信
        await this.realtimeSystem.joinSession(userId, sessionId);

        return {
            sessionId,
            welcomeMessage: await this.generateWelcomeMessage(userId, initialContext)
        };
    }

    // 处理用户消息
    async processUserMessage(sessionId, message, metadata = {}) {
        const session = await this.contentDB.getSession(sessionId);
        if (!session || session.status !== 'active') {
            throw new Error('会话不存在或已结束');
        }

        // 审核用户消息
        const messageModeration = await this.moderateContent(message, {
            type: 'user_message',
            userId: session.userId,
            sessionId
        });

        if (!messageModeration.approved) {
            await this.handleModerationViolation(session, message, messageModeration);
            throw new Error('消息包含违规内容');
        }

        // 更新会话历史
        session.messageHistory.push({
            type: 'user',
            content: message,
            timestamp: new Date(),
            metadata
        });

        // 生成AI响应
        const aiResponse = await this.generateDialogueResponse(session, message);

        // 更新会话
        session.messageHistory.push({
            type: 'assistant',
            content: aiResponse.response,
            timestamp: new Date(),
            moderation: aiResponse.moderation
        });

        session.lastActivity = new Date();

        // 保存更新
        await this.contentDB.updateSession(session);

        // 实时广播
        await this.realtimeSystem.broadcastToSession(sessionId, {
            type: 'ai_response',
            message: aiResponse.response,
            sessionId,
            timestamp: new Date()
        });

        return aiResponse;
    }

    // 生成欢迎消息
    async generateWelcomeMessage(userId, context) {
        const userProfile = await this.userAnalytics.getUserProfile(userId);
        
        const welcomeContext = {
            user: userProfile,
            context,
            timestamp: new Date(),
            system: this.getSystemStatus()
        };

        return await this.aiModels.dialogue.generateWelcome(welcomeContext);
    }

    // 内容优化
    async optimizeContent(content, contentType) {
        const optimizationStrategies = {
            article: this.optimizeArticle.bind(this),
            social: this.optimizeSocialPost.bind(this),
            technical: this.optimizeTechnicalContent.bind(this),
            marketing: this.optimizeMarketingContent.bind(this)
        };

        const optimizer = optimizationStrategies[contentType] || optimizationStrategies.article;
        return optimizer(content);
    }

    // 健康监控
    startHealthMonitoring() {
        setInterval(async () => {
            try {
                await this.performHealthCheck();
                this.systemStatus.lastHealthCheck = new Date();
                this.systemStatus.errorCount = 0;
            } catch (error) {
                this.systemStatus.errorCount++;
                console.error('健康检查失败:', error);
                
                if (this.systemStatus.errorCount > 5) {
                    console.warn('错误次数过多,尝试重启系统...');
                    this.restartSystem();
                }
            }
        }, 30000); // 每30秒检查一次
    }

    // 执行健康检查
    async performHealthCheck() {
        const checks = [
            this.checkAIModels(),
            this.checkDatabase(),
            this.checkRealtimeSystem(),
            this.checkMemoryUsage()
        ];

        const results = await Promise.allSettled(checks);
        
        const healthStatus = {
            timestamp: new Date(),
            overall: 'healthy',
            details: {}
        };

        results.forEach((result, index) => {
            const checkNames = ['ai_models', 'database', 'realtime', 'memory'];
            healthStatus.details[checkNames[index]] = result.status === 'fulfilled' ? 
                'healthy' : 'unhealthy';
        });

        if (Object.values(healthStatus.details).some(status => status === 'unhealthy')) {
            healthStatus.overall = 'degraded';
        }

        await this.contentDB.recordHealthCheck(healthStatus);
        return healthStatus;
    }

    // 系统工具方法
    generateSessionId() {
        return `sess_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
    }

    countWords(text) {
        return text.trim().split(/\s+/).length;
    }

    calculateReadability(text) {
        // 简化的可读性评分算法
        const words = this.countWords(text);
        const sentences = text.split(/[.!?]+/).filter(s => s.trim().length > 0).length;
        const characters = text.replace(/\s/g, '').length;
        
        if (words === 0 || sentences === 0) return 0;
        
        const avgSentenceLength = words / sentences;
        const avgWordLength = characters / words;
        
        return Math.max(0, 100 - (avgSentenceLength + avgWordLength));
    }

    // 错误处理
    async handleGenerationError(error, type, context) {
        console.error(`${type}生成错误:`, error);
        
        await this.contentDB.recordError({
            type: `${type}_generation_error`,
            error: error.message,
            context,
            timestamp: new Date()
        });

        await this.userAnalytics.recordInteraction({
            type: `${type}_generation`,
            success: false,
            error: error.message,
            metadata: context
        });
    }

    async handleModerationViolation(session, message, moderationResult) {
        console.warn('内容审核违规:', {
            sessionId: session.sessionId,
            userId: session.userId,
            message,
            moderationResult
        });

        await this.contentDB.recordModerationViolation({
            sessionId: session.sessionId,
            userId: session.userId,
            content: message,
            moderationResult,
            timestamp: new Date()
        });

        // 通知实时系统
        await this.realtimeSystem.notifyUser(session.userId, {
            type: 'moderation_violation',
            message: '您的内容未通过审核',
            reasons: moderationResult.reasons
        });
    }

    // 系统验证
    validateSystemStatus() {
        if (!this.systemStatus.isInitialized) {
            throw new Error('系统未初始化');
        }

        if (this.systemStatus.errorCount > 10) {
            throw new Error('系统状态不稳定,请稍后重试');
        }
    }

    // 重启系统
    async restartSystem() {
        console.log('正在重启系统...');
        this.systemStatus.isInitialized = false;
        await this.realtimeSystem.stop();
        setTimeout(() => this.initializeSystem(), 2000);
    }
}

// AI对话模型实现
class AIDialogueModel {
    constructor() {
        this.modelVersion = 'dialogue-v2';
        this.isLoaded = false;
    }

    async loadModel(version) {
        // 模拟模型加载过程
        await new Promise(resolve => setTimeout(resolve, 1000));
        this.modelVersion = version;
        this.isLoaded = true;
        return { success: true, version };
    }

    async generate(options) {
        if (!this.isLoaded) throw new Error('模型未加载');
        
        const { context, tone, maxLength, creativity } = options;
        
        // 模拟AI生成过程
        await this.simulateProcessing(500 + Math.random() * 500);
        
        // 基于上下文和参数生成响应
        return this.generateResponseBasedOnContext(context, tone, maxLength, creativity);
    }

    async generateWelcome(context) {
        const welcomeTemplates = [
            "您好!我是AI助手,很高兴为您服务。请问有什么可以帮您的吗?",
            "欢迎使用我们的智能对话系统!我会尽力回答您的问题。",
            "您好!我是您的智能助手,随时为您提供帮助和支持。"
        ];
        
        return welcomeTemplates[Math.floor(Math.random() * welcomeTemplates.length)];
    }

    simulateProcessing(delay) {
        return new Promise(resolve => setTimeout(resolve, delay));
    }

    generateResponseBasedOnContext(context, tone, maxLength, creativity) {
        // 简化的响应生成逻辑
        const responses = {
            friendly: [
                "这是一个很好的问题!让我来帮您解答。",
                "感谢您的提问!我很乐意帮助您。",
                "我理解您的需求,让我为您提供一些建议。"
            ],
            professional: [
                "根据您提供的信息,我的分析如下:",
                "从专业角度考虑,我建议如下:",
                "基于当前的情况,我的建议是:"
            ],
            casual: [
                "嘿!这个问题很有意思,让我想想...",
                "哦,我明白你的意思了!我的看法是:",
                "哈哈,这个问题问得好!我觉得:"
            ]
        };

        const toneResponses = responses[tone] || responses.friendly;
        let response = toneResponses[Math.floor(Math.random() * toneResponses.length)];
        
        // 添加一些随机内容以模拟创造性
        if (creativity > 0.5) {
            response += " " + this.generateCreativeContent(creativity);
        }

        // 限制长度
        if (response.length > maxLength) {
            response = response.substring(0, maxLength - 3) + '...';
        }

        return response;
    }

    generateCreativeContent(creativity) {
        const creativeBits = [
            "另外,您可能还想知道...",
            "值得一提的是...",
            "从另一个角度考虑...",
            "根据最新研究...",
            "很多人也问过类似的问题..."
        ];

        return creativity > 0.8 ? 
            creativeBits[Math.floor(Math.random() * creativeBits.length)] : '';
    }
}

// 内容审核系统实现
class AIModerationSystem {
    constructor() {
        this.moderationRules = this.loadModerationRules();
        this.isLoaded = false;
    }

    async loadModel(version) {
        await new Promise(resolve => setTimeout(resolve, 800));
        this.isLoaded = true;
        return { success: true, version };
    }

    async analyze(content, context) {
        if (!this.isLoaded) throw new Error('审核模型未加载');
        
        await this.simulateProcessing(300 + Math.random() * 200);
        
        const issues = this.checkContentIssues(content, context);
        
        return {
            approved: issues.length === 0,
            confidence: this.calculateConfidence(issues),
            reasons: issues,
            categories: this.categorizeIssues(issues),
            safe: issues.length === 0,
            timestamp: new Date()
        };
    }

    checkContentIssues(content, context) {
        const issues = [];
        const contentLower = content.toLowerCase();

        // 检查敏感词
        this.moderationRules.sensitiveWords.forEach(word => {
            if (contentLower.includes(word)) {
                issues.push(`包含敏感词: ${word}`);
            }
        });

        // 检查仇恨言论
        this.moderationRules.hateSpeechPatterns.forEach(pattern => {
            if (pattern.test(content)) {
                issues.push('可能包含仇恨言论');
            }
        });

        // 检查垃圾内容
        if (this.isSpamContent(content, context)) {
            issues.push('疑似垃圾内容');
        }

        return issues;
    }

    calculateConfidence(issues) {
        return issues.length === 0 ? 0.95 : Math.max(0, 0.5 - (issues.length * 0.1));
    }

    categorizeIssues(issues) {
        return issues.map(issue => {
            if (issue.includes('敏感词')) return 'sensitive_content';
            if (issue.includes('仇恨言论')) return 'hate_speech';
            if (issue.includes('垃圾内容')) return 'spam';
            return 'other';
        });
    }

    isSpamContent(content, context) {
        // 简单的垃圾内容检测
        const spamPatterns = [
            /(http|https):\/\/[^\s]+/g, // 包含链接
            /[0-9]{5,}/g, // 多个数字
            /(!|\?){3,}/g // 多个感叹号或问号
        ];

        return spamPatterns.some(pattern => pattern.test(content));
    }

    loadModerationRules() {
        return {
            sensitiveWords: ['违法', '暴力', '色情', '赌博', '毒品'],
            hateSpeechPatterns: [
                /歧视.*(种族|性别|宗教)/,
                /仇恨.*言论/,
                /侮辱.*(人|群体)/
            ],
            spamThreshold: 0.7
        };
    }

    simulateProcessing(delay) {
        return new Promise(resolve => setTimeout(resolve, delay));
    }
}

// 数据库实现
class ContentDatabase {
    constructor() {
        this.sessions = new Map();
        this.dialogues = new Map();
        this.content = new Map();
        this.isInitialized = false;
    }

    async initialize() {
        // 模拟数据库初始化
        await new Promise(resolve => setTimeout(resolve, 500));
        this.isInitialized = true;
        return true;
    }

    async createSession(session) {
        this.sessions.set(session.sessionId, session);
        return session;
    }

    async getSession(sessionId) {
        return this.sessions.get(sessionId);
    }

    async updateSession(session) {
        this.sessions.set(session.sessionId, session);
        return session;
    }

    async recordDialogue(record) {
        const id = `dial_${Date.now()}_${Math.random().toString(36).substr(2, 6)}`;
        this.dialogues.set(id, { id, ...record });
        return id;
    }

    async recordContentGeneration(record) {
        const id = `cont_${Date.now()}_${Math.random().toString(36).substr(2, 6)}`;
        this.content.set(id, { id, ...record });
        return id;
    }

    async recordModeration(record) {
        // 实现审核记录存储
        return true;
    }

    async recordHealthCheck(record) {
        // 实现健康检查记录存储
        return true;
    }

    async recordError(record) {
        // 实现错误记录存储
        return true;
    }
}

// 使用示例
const aiSystem = new WXAIContentSystem();

// 等待系统初始化
setTimeout(async () => {
    try {
        // 示例1: 生成对话
        const dialogueResult = await aiSystem.generateDialogue(
            "你好,我想了解人工智能", 
            { userId: "user123", tone: "friendly" }
        );
        console.log('对话生成结果:', dialogueResult);

        // 示例2: 生成内容
        const contentResult = await aiSystem.generateContent(
            "写一篇关于机器学习简介的文章",
            { contentType: "article", length: "short" }
        );
        console.log('内容生成结果:', contentResult);

        // 示例3: 开始会话
        const session = await aiSystem.startConversationSession("user123");
        console.log('会话已开始:', session);

    } catch (error) {
        console.error('示例运行失败:', error);
    }
}, 2000);

使用说明

功能特点

  1. ​多模态AI集成​​:

    • 智能对话生成

    • 内容创作辅助

    • 实时内容审核

    • 多语言翻译

  2. ​实时通信系统​​:

    • WebSocket实时对话

    • 多会话管理

    • 实时内容更新

  3. ​智能审核系统​​:

    • 敏感内容检测

    • 垃圾内容过滤

    • 质量评估系统

  4. ​性能监控​​:

    • 系统健康检查

    • 错误恢复机制

    • 资源使用监控

核心组件

  1. ​AI模型管理系统​​:

    • 模型加载与版本控制

    • 服务状态监控

    • 故障转移处理

  2. ​内容生成引擎​​:

    • 上下文感知生成

    • 多风格支持

    • 创造性控制

  3. ​审核系统​​:

    • 实时内容分析

    • 多规则引擎

    • 置信度评分

  4. ​会话管理系统​​:

    • 对话状态维护

    • 历史记录管理

    • 实时同步

使用方法

  1. ​初始化系统​​:

    const aiSystem = new WXAIContentSystem();
  2. ​生成对话内容​​:

    const result = await aiSystem.generateDialogue("用户输入内容", {
        userId: "user123",
        tone: "friendly"
    });
  3. ​生成文本内容​​:

    const content = await aiSystem.generateContent("写作提示", {
        contentType: "article",
        style: "professional"
    });
  4. ​管理对话会话​​:

    // 开始新会话
    const session = await aiSystem.startConversationSession("user123");
    
    // 处理用户消息
    const response = await aiSystem.processUserMessage(session.sessionId, "用户消息");
  5. ​内容审核​​:

    const moderation = await aiSystem.moderateContent("待审核内容");

应用场景

  1. ​智能客服系统​​:

    • 自动响应客户咨询

    • 多轮对话管理

    • 智能问题解决

  2. ​内容创作平台​​:

    • 文章自动生成

    • 社交媒体内容创作

    • 多语言内容生产

  3. ​社区 moderation​​:

    • 实时内容审核

    • 违规内容检测

    • 质量控制系统

  4. ​教育辅助​​:

    • 智能问答系统

    • 学习内容生成

    • 多语言学习支持

技术亮点

  1. ​模块化架构​​:

    • 独立可替换的AI模型

    • 可扩展的审核规则

    • 灵活的内容策略

  2. ​实时性能​​:

    • 异步处理管道

    • 批量操作优化

    • 内存高效管理

  3. ​错误恢复​​:

    • 自动重试机制

    • 优雅降级策略

    • 健康状态监控

  4. ​安全特性​​:

    • 内容安全过滤

    • 用户行为分析

    • 审核日志记录

扩展建议

  1. ​高级AI集成​​:

    • 支持更多AI模型提供商

    • 自定义模型训练

    • 领域特定优化

  2. ​数据分析​​:

    • 用户行为分析

    • 内容效果追踪

    • 质量指标监控

  3. ​管理界面​​:

    • 实时监控面板

    • 审核管理工具

    • 系统配置界面

  4. ​合规特性​​:

    • 数据隐私保护

    • 审核记录存档

    • 合规报告生成

这个系统为微信小程序开发者提供了一个完整的AI内容生成和审核解决方案,能够智能地处理用户交互、生成高质量内容,并确保所有输出内容的安全性和 appropriateness。

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