const { DataTypes } = require('sequelize');

module.exports = (sequelize) => {
  const AlertLog = sequelize.define('AlertLog', {
    id: {
      type: DataTypes.UUID,
      defaultValue: sequelize.Sequelize.UUIDV4,
      primaryKey: true
    },
    alert_rule_id: {
      type: DataTypes.UUID,
      allowNull: true, // Allow null for testing
      references: {
        model: 'alert_rules',
        key: 'id'
      }
    },
    detection_id: {
      type: DataTypes.UUID,
      allowNull: true, // Allow null for testing
      references: {
        model: 'drone_detections',
        key: 'id'
      }
    },
    device_id: {
      type: DataTypes.STRING(255),
      allowNull: true, // Allow null for testing
      references: {
        model: 'devices',
        key: 'id'
      }
    },
    alert_event_id: {
      type: DataTypes.UUID,
      allowNull: true,
      comment: 'Groups related alerts (SMS, email, webhook) that are part of the same detection event'
    },
    alert_type: {
      type: DataTypes.ENUM('sms', 'email', 'webhook', 'push'),
      allowNull: true, // Allow null for testing
      defaultValue: 'sms'
    },
    recipient: {
      type: DataTypes.STRING,
      allowNull: true, // Allow null for testing
      defaultValue: 'test@example.com',
      comment: 'Phone number, email, or webhook URL'
    },
    message: {
      type: DataTypes.TEXT,
      allowNull: false,
      comment: 'Alert message content'
    },
    status: {
      type: DataTypes.ENUM('pending', 'sent', 'failed', 'delivered'),
      defaultValue: 'pending'
    },
    sent_at: {
      type: DataTypes.DATE,
      allowNull: true
    },
    delivered_at: {
      type: DataTypes.DATE,
      allowNull: true
    },
    error_message: {
      type: DataTypes.TEXT,
      allowNull: true,
      comment: 'Error message if alert failed'
    },
    external_id: {
      type: DataTypes.STRING,
      allowNull: true,
      comment: 'External service message ID (Twilio SID, etc.)'
    },
    cost: {
      type: DataTypes.DECIMAL(6, 4),
      allowNull: true,
      comment: 'Cost of sending the alert (for SMS, etc.)'
    },
    retry_count: {
      type: DataTypes.INTEGER,
      defaultValue: 0,
      comment: 'Number of retry attempts'
    },
    priority: {
      type: DataTypes.ENUM('low',  'normal', 'medium', 'high', 'critical'),
      defaultValue: 'medium'
    },
    created_at: {
      type: DataTypes.DATE,
      defaultValue: sequelize.Sequelize.NOW
    },
    updated_at: {
      type: DataTypes.DATE,
      defaultValue: sequelize.Sequelize.NOW
    }
  }, {
    tableName: 'alert_logs',
    timestamps: true,
    createdAt: 'created_at',
    updatedAt: 'updated_at',
    indexes: [
      {
        fields: ['alert_rule_id']
      },
      {
        fields: ['detection_id']
      },
      {
        fields: ['status']
      },
      {
        fields: ['sent_at']
      },
      {
        fields: ['alert_type', 'status']
      },
      {
        fields: ['alert_event_id']
      }
    ]
  });

  return AlertLog;
};