const { DataTypes } = require('sequelize');
const { sequelize } = require('../config/database');

const Sentences = sequelize.define('Sentences', {
    id: {
      type: DataTypes.UUID,
      defaultValue: DataTypes.UUIDV4,
      primaryKey: true,
      comment: 'Unique identifier for sentence entry'
    },
    // Từ thực tế (wash, washes, washing, ate, eaten...)
    text: { 
      type: DataTypes.TEXT, 
      allowNull: false
    },
    ipa : {
      type: DataTypes.TEXT,
      comment: 'International Phonetic Alphabet representation'
    },
    // Nội dung dùng chung (có thể lưu JSON để dễ quản lý hoặc dùng chung cho cả group)
    vi: {
      type: DataTypes.TEXT,
      defaultValue: '',
      comment: 'Vietnamese meaning'
    },
    grade : {
      type: DataTypes.TEXT,
      defaultValue: '0',
      comment: 'Grade level (e.g., Grade 1, Grade 2)'
    },
    category: {
      type: DataTypes.TEXT,
      comment: 'Category of the sentence (e.g., Action Verbs, Nouns)'
    },
    topic: {
      type: DataTypes.TEXT,
      comment: 'Topic of the sentence (e.g., Food, Travel, Education)'
    },
    image_small: {
      type: DataTypes.JSON,
      defaultValue: [],
      comment: 'Array of image URLs'
    },
    image_square: {
      type: DataTypes.JSON,
      defaultValue: [],
      comment: 'Array of image URLs'
    },
    image_normal: {
      type: DataTypes.JSON,
      defaultValue: [],
      comment: 'Array of image URLs'
    },
    audio : {
      type: DataTypes.JSON,
      comment: 'Array of audio URLs'
    },
    tags: {
      type: DataTypes.JSON,
      defaultValue: [],
      comment: 'Array of tags for categorization'
    },
    usage_note: {
      type: DataTypes.TEXT,
      defaultValue: '',
      comment: 'Lưu ý về ngữ cảnh sử dụng câu này'
    },
    etc : {
      type: DataTypes.TEXT,
      defaultValue: '',
      comment: 'Các thông tin khác liên quan đến câu này (ví dụ: level, grammar points, etc.)'
    },
    is_active: {
      type: DataTypes.BOOLEAN,
      defaultValue: true,
      comment: 'Whether this sentence entry is active'
    },
    created_at: {
      type: DataTypes.DATE,
      defaultValue: DataTypes.NOW
    },
    updated_at: {
      type: DataTypes.DATE,
      defaultValue: DataTypes.NOW
    }
  }, {
    tableName: 'sentences',
    timestamps: true,
    createdAt: 'created_at',
    updatedAt: 'updated_at',
    indexes: [
      {
        name: 'idx_sentences_text',
        fields: [{ name: 'text', length: 191 }]
      },
      {
        name: 'idx_category',
        fields: [{ name: 'category', length: 191 }]
      }
    ]
  });

module.exports = Sentences;