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

const Message = sequelize.define('messages', {
  id: { type: DataTypes.UUID, defaultValue: DataTypes.UUIDV4, primaryKey: true },
  school_id: { type: DataTypes.UUID },
  sender_id: { type: DataTypes.UUID, allowNull: false },
  receiver_id: { type: DataTypes.UUID },
  receiver_role: { type: DataTypes.STRING(50) },
  subject: { type: DataTypes.STRING(255) },
  content: { type: DataTypes.TEXT, allowNull: false },
  message_type: {
    type: DataTypes.ENUM('direct', 'broadcast', 'class_message', 'parent_teacher'),
    defaultValue: 'direct'
  },
  parent_message_id: { type: DataTypes.UUID },
  attachments: { type: DataTypes.JSON },
  is_read: { type: DataTypes.BOOLEAN, defaultValue: false },
  read_at: { type: DataTypes.DATE },
  is_archived: { type: DataTypes.BOOLEAN, defaultValue: false },
  created_at: { type: DataTypes.DATE, allowNull: false, defaultValue: DataTypes.NOW },
  updated_at: { type: DataTypes.DATE, allowNull: false, defaultValue: DataTypes.NOW },
}, {
  tableName: 'messages',
  timestamps: true,
  underscored: true,
  indexes: [
    { fields: ['school_id'] },
    { fields: ['sender_id'] },
    { fields: ['receiver_id'] },
    { fields: ['is_read'] },
    { fields: ['parent_message_id'] },
  ],
});

module.exports = Message;