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

const Context = sequelize.define('Context', {
  uuid: {
    type: DataTypes.UUID,
    defaultValue: DataTypes.UUIDV4,
    primaryKey: true,
    comment: 'Unique identifier for context'
  },
  title: {
    type: DataTypes.STRING(255),
    allowNull: false,
    comment: 'Title of the context item'
  },
  context: {
    type: DataTypes.TEXT,
    allowNull: false,
    comment: 'Context description'
  },
  knowledge: {
    type: DataTypes.TEXT,
    comment: 'Additional knowledge or information'
  },
  type: {
    type: DataTypes.STRING(50),
    allowNull: false,
    comment: 'Context type (e.g., vocabulary, grammar)'
  },
  desc: {
    type: DataTypes.TEXT,
    comment: 'Detailed description or requirement'
  },
  prompt: {
    type: DataTypes.JSON,
    comment: 'Prompt configuration object'
  },
  image: {
    type: DataTypes.JSON,
    comment: 'Array of image URLs'
  },
  difficulty: {
    type: DataTypes.INTEGER,
    defaultValue: 1,
    comment: 'Difficulty level (1-10)'
  },
  max: {
    type: DataTypes.INTEGER,
    defaultValue: 0,
    comment: 'Maximum number of images or items'
  },
  isPrompt: {
    type: DataTypes.BOOLEAN,
    defaultValue: false,
    comment: 'Prompt created (0/1)'
  },
  isList: {
    type: DataTypes.BOOLEAN,
    defaultValue: false,
    comment: 'Waiting for more images (0/1)'
  },
  isApprove: {
    type: DataTypes.BOOLEAN,
    defaultValue: false,
    comment: 'Teacher approval status (0/1)'
  },
  created_at: {
    type: DataTypes.DATE,
    defaultValue: DataTypes.NOW
  },
  updated_at: {
    type: DataTypes.DATE,
    defaultValue: DataTypes.NOW
  }
}, {
  tableName: 'context',
  timestamps: true,
  createdAt: 'created_at',
  updatedAt: 'updated_at',
  indexes: [
    {
      name: 'idx_context_type',
      fields: ['type']
    },
    {
      name: 'idx_context_title',
      fields: ['title']
    }
  ]
});

module.exports = Context;