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

module.exports = (sequelize) => {
  const AuditLog = sequelize.define('AuditLog', {
    id: {
      type: DataTypes.INTEGER,
      primaryKey: true,
      autoIncrement: true
    },
    timestamp: {
      type: DataTypes.DATE,
      allowNull: false,
      defaultValue: DataTypes.NOW
    },
    level: {
      type: DataTypes.ENUM('INFO', 'WARNING', 'ERROR', 'CRITICAL'),
      allowNull: false
    },
    action: {
      type: DataTypes.STRING(100),
      allowNull: false,
      comment: 'The action performed (e.g., logo_upload, logo_removal)'
    },
    message: {
      type: DataTypes.TEXT,
      allowNull: false,
      comment: 'Human-readable description of the event'
    },
    user_id: {
      type: DataTypes.INTEGER,
      allowNull: true,
      comment: 'ID of the user who performed the action'
    },
    username: {
      type: DataTypes.STRING(255),
      allowNull: true,
      comment: 'Username of the user who performed the action'
    },
    tenant_id: {
      type: DataTypes.INTEGER,
      allowNull: true,
      comment: 'ID of the tenant affected by the action'
    },
    tenant_slug: {
      type: DataTypes.STRING(255),
      allowNull: true,
      comment: 'Slug of the tenant affected by the action'
    },
    ip_address: {
      type: DataTypes.STRING(45),
      allowNull: true,
      comment: 'IP address of the user (supports IPv6)'
    },
    user_agent: {
      type: DataTypes.TEXT,
      allowNull: true,
      comment: 'User agent string from the request'
    },
    path: {
      type: DataTypes.STRING(500),
      allowNull: true,
      comment: 'Request path that triggered the action'
    },
    metadata: {
      type: DataTypes.JSON,
      allowNull: true,
      comment: 'Additional metadata about the event'
    },
    success: {
      type: DataTypes.BOOLEAN,
      allowNull: true,
      comment: 'Whether the action was successful'
    }
  }, {
    tableName: 'audit_logs',
    timestamps: false, // We use our own timestamp field
    indexes: [
      {
        fields: ['timestamp']
      },
      {
        fields: ['action']
      },
      {
        fields: ['user_id']
      },
      {
        fields: ['tenant_id']
      },
      {
        fields: ['level']
      },
      {
        fields: ['timestamp', 'action']
      },
      {
        fields: ['tenant_id', 'timestamp']
      }
    ]
  });

  // Define associations
  AuditLog.associate = function(models) {
    // Association with User
    AuditLog.belongsTo(models.User, {
      foreignKey: 'user_id',
      as: 'user'
    });

    // Association with Tenant
    AuditLog.belongsTo(models.Tenant, {
      foreignKey: 'tenant_id',
      as: 'tenant'
    });
  };

  return AuditLog;
};