const db = require('../db/models');
const ValidationError = require('./notifications/errors/validation');

const Sequelize = db.Sequelize;
const Op = Sequelize.Op;

/**
 * @param {string} permission
 * @param {object} currentUser
 */
async function checkPermissions(permission, currentUser) {

  if (!currentUser) {
    throw new ValidationError('auth.unauthorized');
  }

  const userPermission = currentUser.custom_permissions.find(
    (cp) => cp.name === permission,
  );

  if (userPermission) {
    return true;
  }

  try {
    if (!currentUser.app_role) {
      throw new ValidationError('auth.forbidden');
    }

    const permissions = await currentUser.app_role.getPermissions();

    return !!permissions.find((p) => p.name === permission);
  } catch (e) {
    throw e;
  }
}

module.exports = class SearchService {
  static async search(searchQuery, currentUser) {
    try {
      if (!searchQuery) {
        throw new ValidationError('iam.errors.searchQueryRequired');
      }
      const tableColumns = {

            "users": [

                "firstName",

                "lastName",

                "phoneNumber",

                "email",

            ],

            "audit_logs": [

                "action",

                "entity",

                "diff_json",

            ],

            "beds": [

                "code",

            ],

            "booking_upsells": [

                "currency",

            ],

            "bookings": [

                "code",

                "currency",

                "stripe_payment_intent_id",

            ],

            "coupons": [

                "code",

                "currency",

            ],

            "event_orders": [

                "currency",

                "stripe_payment_intent_id",

            ],

            "event_ticket_types": [

                "name",

                "currency",

            ],

            "event_tickets": [

                "code",

                "qr_svg",

                "issued_to_name",

                "issued_to_email",

            ],

            "events": [

                "name",

                "description",

            ],

            "housekeeping_tasks": [

                "notes",

            ],

            "maintenance_tickets": [

                "title",

                "description",

                "photos_json",

            ],

            "message_threads": [

                "subject",

            ],

            "messages": [

                "body",

                "attachments_json",

            ],

            "payments": [

                "stripe_payment_intent_id",

                "currency",

            ],

            "reviews": [

                "title",

                "body",

            ],

            "room_types": [

                "name",

                "description",

                "amenities_json",

            ],

            "rooms": [

                "name",

                "notes",

            ],

            "upsells": [

                "name",

                "description",

                "currency",

            ],

            "properties": [

                "name",

            ],

      };
      const columnsInt = {

            "audit_logs": [

                "entity_id",

            ],

            "booking_upsells": [

                "quantity",

                "unit_price",

            ],

            "bookings": [

                "guests_count",

                "total_amount",

            ],

            "coupons": [

                "value",

                "max_redemptions",

                "times_redeemed",

            ],

            "event_orders": [

                "total_amount",

            ],

            "event_ticket_types": [

                "price",

                "capacity_overrides",

            ],

            "events": [

                "capacity",

            ],

            "inventory_dates": [

                "alloted_beds",

                "override_price",

            ],

            "payments": [

                "amount",

            ],

            "reviews": [

                "rating",

            ],

            "room_types": [

                "capacity",

                "base_price",

            ],

            "rooms": [

                "floor",

            ],

            "upsells": [

                "price",

                "stock",

            ],

      };

      let allFoundRecords = [];

      for (const tableName in tableColumns) {
        if (tableColumns.hasOwnProperty(tableName)) {
          const attributesToSearch = tableColumns[tableName];
          const attributesIntToSearch = columnsInt[tableName] || [];
          const whereCondition = {
            [Op.or]: [
              ...attributesToSearch.map(attribute => ({
                [attribute]: {
                  [Op.iLike] : `%${searchQuery}%`,
                },
              })),
              ...attributesIntToSearch.map(attribute => (
                Sequelize.where(
                  Sequelize.cast(Sequelize.col(`${tableName}.${attribute}`), 'varchar'),
                  { [Op.iLike]: `%${searchQuery}%` }
                )
              )),
            ],
          };

          const hasPermission = await checkPermissions(`READ_${tableName.toUpperCase()}`, currentUser);
          if (!hasPermission) {
            continue;
          }

          const foundRecords = await db[tableName].findAll({
            where: whereCondition,
            attributes: [...tableColumns[tableName], 'id', ...attributesIntToSearch],
          });

          const modifiedRecords = foundRecords.map((record) => {
            const matchAttribute = [];

            for (const attribute of attributesToSearch) {
              if (record[attribute]?.toLowerCase()?.includes(searchQuery.toLowerCase())) {
                matchAttribute.push(attribute);
              }
            }

            for (const attribute of attributesIntToSearch) {
              const castedValue = String(record[attribute]);
              if (castedValue && castedValue.toLowerCase().includes(searchQuery.toLowerCase())) {
                matchAttribute.push(attribute);
              }
            }

            return {
              ...record.get(),
              matchAttribute,
              tableName,
            };
          });

          allFoundRecords = allFoundRecords.concat(modifiedRecords);
        }
      }

      return allFoundRecords;
    } catch (error) {
      throw error;
    }
  }
}
