'use strict';

module.exports = {
  up: async (queryInterface, Sequelize) => {
    await queryInterface.createTable('audit_logs', {
      id: {
        type: Sequelize.INTEGER,
        primaryKey: true,
        autoIncrement: true,
        allowNull: false
      },
      timestamp: {
        type: Sequelize.DATE,
        allowNull: false,
        defaultValue: Sequelize.NOW
      },
      level: {
        type: Sequelize.ENUM('INFO', 'WARNING', 'ERROR', 'CRITICAL'),
        allowNull: false
      },
      action: {
        type: Sequelize.STRING(100),
        allowNull: false,
        comment: 'The action performed (e.g., logo_upload, logo_removal)'
      },
      message: {
        type: Sequelize.TEXT,
        allowNull: false,
        comment: 'Human-readable description of the event'
      },
      user_id: {
        type: Sequelize.INTEGER,
        allowNull: true,
        comment: 'ID of the user who performed the action',
        references: {
          model: 'users',
          key: 'id'
        },
        onUpdate: 'CASCADE',
        onDelete: 'SET NULL'
      },
      username: {
        type: Sequelize.STRING(255),
        allowNull: true,
        comment: 'Username of the user who performed the action'
      },
      tenant_id: {
        type: Sequelize.INTEGER,
        allowNull: true,
        comment: 'ID of the tenant affected by the action',
        references: {
          model: 'tenants',
          key: 'id'
        },
        onUpdate: 'CASCADE',
        onDelete: 'SET NULL'
      },
      tenant_slug: {
        type: Sequelize.STRING(255),
        allowNull: true,
        comment: 'Slug of the tenant affected by the action'
      },
      ip_address: {
        type: Sequelize.STRING(45),
        allowNull: true,
        comment: 'IP address of the user (supports IPv6)'
      },
      user_agent: {
        type: Sequelize.TEXT,
        allowNull: true,
        comment: 'User agent string from the request'
      },
      path: {
        type: Sequelize.STRING(500),
        allowNull: true,
        comment: 'Request path that triggered the action'
      },
      metadata: {
        type: Sequelize.JSON,
        allowNull: true,
        comment: 'Additional metadata about the event'
      },
      success: {
        type: Sequelize.BOOLEAN,
        allowNull: true,
        comment: 'Whether the action was successful'
      }
    });

    // Add indexes for performance
    await queryInterface.addIndex('audit_logs', ['timestamp']);
    await queryInterface.addIndex('audit_logs', ['action']);
    await queryInterface.addIndex('audit_logs', ['user_id']);
    await queryInterface.addIndex('audit_logs', ['tenant_id']);
    await queryInterface.addIndex('audit_logs', ['level']);
    await queryInterface.addIndex('audit_logs', ['timestamp', 'action']);
    await queryInterface.addIndex('audit_logs', ['tenant_id', 'timestamp']);
  },

  down: async (queryInterface, Sequelize) => {
    await queryInterface.dropTable('audit_logs');
  }
};