ai-dimension/backend/wdkj-server/src/models/pinyin/PinyinContent.js

const mongoose = require('mongoose');

/**
 * 拼音内容模型
 * 存储拼音字母的基础信息、音频、口型图、关联词语等
 */
const pinyinContentSchema = new mongoose.Schema({
  // 拼音符号，如 "b"
  symbol: {
    type: String,
    required: true,
    unique: true,
    trim: true
  },
  
  // 拼音类型：initial(声母)/final(韵母)/overall(整体认读)
  type: {
    type: String,
    required: true,
    enum: ['initial', 'final', 'overall']
  },
  
  // 拼音名称，如 "玻"
  name: {
    type: String,
    required: true,
    trim: true
  },
  
  // 发音音频URL
  audioUrl: {
    type: String,
    default: ''
  },
  
  // 口型示意图URL
  mouthImage: {
    type: String,
    default: ''
  },
  
  // 发音方法描述
  pronunciation: {
    type: String,
    default: ''
  },
  
  // 显示顺序
  order: {
    type: Number,
    default: 0
  },
  
  // 是否免费
  isFree: {
    type: Boolean,
    default: true
  },
  
  // 状态：active(启用)/inactive(禁用)
  status: {
    type: String,
    enum: ['active', 'inactive'],
    default: 'active'
  },
  
  // 相关词语
  words: [{
    word: { type: String, required: true },      // 汉字
    pinyin: { type: String, required: true },    // 拼音
    image: { type: String, default: '' },        // 图片URL
    audioUrl: { type: String, default: '' },     // 音频URL
    meaning: { type: String, default: '' }       // 释义
  }],
  
  // 关联游戏配置
  games: [{
    type: { 
      type: String, 
      enum: ['match', 'tone', 'find', 'puzzle', 'mimic', 'runner']
    },
    config: { type: mongoose.Schema.Types.Mixed, default: {} },
    isEnabled: { type: Boolean, default: true }
  }],
  
  // 探索区域配置
  exploreAreas: {
    audio: { type: Boolean, default: true },     // 声音发现
    mouth: { type: Boolean, default: true },     // 口型观察
    speak: { type: Boolean, default: true },     // 语音互动
    write: { type: Boolean, default: true },     // 书写体验
    game: { type: Boolean, default: true },      // 趣味互动
    words: { type: Boolean, default: true }      // 词语发现
  },
  
  // 创建时间
  createdAt: {
    type: Date,
    default: Date.now
  },
  
  // 更新时间
  updatedAt: {
    type: Date,
    default: Date.now
  }
});

// 索引
pinyinContentSchema.index({ type: 1, order: 1 });
pinyinContentSchema.index({ status: 1 });
pinyinContentSchema.index({ isFree: 1 });

// 更新中间件
pinyinContentSchema.pre('save', function(next) {
  this.updatedAt = Date.now();
  next();
});

module.exports = mongoose.model('PinyinContent', pinyinContentSchema);