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

const Notification = sequelize.define('notifications', {
  id: { type: DataTypes.UUID, defaultValue: DataTypes.UUIDV4, primaryKey: true },
  school_id: { type: DataTypes.UUID },
  title: { type: DataTypes.STRING(255), allowNull: false },
  content: { type: DataTypes.TEXT },
  notification_type: { 
    type: DataTypes.ENUM('announcement', 'event', 'emergency', 'reminder', 'grade_update', 'attendance_alert'),
    defaultValue: 'announcement'
  },
  priority: {
    type: DataTypes.ENUM('low', 'normal', 'high', 'urgent'),
    defaultValue: 'normal'
  },
  target_role: { type: DataTypes.STRING(50) },
  target_users: { type: DataTypes.JSON },
  scheduled_at: { type: DataTypes.DATE },
  sent_at: { type: DataTypes.DATE },
  created_by: { type: DataTypes.UUID },
  status: {
    type: DataTypes.ENUM('draft', 'scheduled', 'sent', 'cancelled'),
    defaultValue: 'draft'
  },
  created_at: { type: DataTypes.DATE, allowNull: false, defaultValue: DataTypes.NOW },
  updated_at: { type: DataTypes.DATE, allowNull: false, defaultValue: DataTypes.NOW },
}, {
  tableName: 'notifications',
  timestamps: true,
  underscored: true,
  indexes: [
    { fields: ['school_id'] },
    { fields: ['notification_type'] },
    { fields: ['status'] },
    { fields: ['scheduled_at'] },
  ],
});

module.exports = Notification;