const { v4: uuidv4 } = require('uuid');

module.exports = (sequelize, DataTypes) => {
  const GuestSettings = sequelize.define('GuestSettings', {
    id: {
      type: DataTypes.CHAR(36),
      primaryKey: true,
      defaultValue: () => uuidv4(),
      allowNull: false,
      comment: 'UUID primary key'
    },
    maxQuizzes: {
      type: DataTypes.INTEGER,
      allowNull: false,
      defaultValue: 3,
      validate: {
        min: {
          args: [1],
          msg: 'Maximum quizzes must be at least 1'
        },
        max: {
          args: [50],
          msg: 'Maximum quizzes cannot exceed 50'
        }
      },
      field: 'max_quizzes',
      comment: 'Maximum number of quizzes a guest can take'
    },
    expiryHours: {
      type: DataTypes.INTEGER,
      allowNull: false,
      defaultValue: 24,
      validate: {
        min: {
          args: [1],
          msg: 'Expiry hours must be at least 1'
        },
        max: {
          args: [168],
          msg: 'Expiry hours cannot exceed 168 (7 days)'
        }
      },
      field: 'expiry_hours',
      comment: 'Guest session expiry time in hours'
    },
    publicCategories: {
      type: DataTypes.JSON,
      allowNull: false,
      defaultValue: [],
      get() {
        const value = this.getDataValue('publicCategories');
        if (typeof value === 'string') {
          try {
            return JSON.parse(value);
          } catch (e) {
            return [];
          }
        }
        return value || [];
      },
      set(value) {
        this.setDataValue('publicCategories', JSON.stringify(value));
      },
      field: 'public_categories',
      comment: 'Array of category UUIDs accessible to guests'
    },
    featureRestrictions: {
      type: DataTypes.JSON,
      allowNull: false,
      defaultValue: {
        allowBookmarks: false,
        allowReview: true,
        allowPracticeMode: true,
        allowTimedMode: false,
        allowExamMode: false
      },
      get() {
        const value = this.getDataValue('featureRestrictions');
        if (typeof value === 'string') {
          try {
            return JSON.parse(value);
          } catch (e) {
            return {
              allowBookmarks: false,
              allowReview: true,
              allowPracticeMode: true,
              allowTimedMode: false,
              allowExamMode: false
            };
          }
        }
        return value || {
          allowBookmarks: false,
          allowReview: true,
          allowPracticeMode: true,
          allowTimedMode: false,
          allowExamMode: false
        };
      },
      set(value) {
        this.setDataValue('featureRestrictions', JSON.stringify(value));
      },
      field: 'feature_restrictions',
      comment: 'Feature restrictions for guest users'
    }
  }, {
    tableName: 'guest_settings',
    timestamps: true,
    underscored: true,
    comment: 'System-wide guest user settings'
  });

  return GuestSettings;
};