/**
 * Model for managing sites table in the database.
 */

const { supabase } = require('../auth');
const { isValidDomain } = require('../helpers/utils');

class SiteModel {

    static tableName = 'sites';

    /**
     * Inserts a new site into the database.
     *
     * @param {string} domainName - The domain name of the site.
     *
     * @returns {Promise<Object>} - The result of the insert operation.
     */
    async insert(domainName) {
        // validate inputs
        if (!domainName) {
            throw new Error('Domain name is required to insert a site.');
        }

        // validate domain name format
        if (!isValidDomain(domainName)) {
            throw new Error('Invalid domain name format.');
        }

        // check if the domain name already exists
        if (await this.getByDomainName(domainName).then(data => data.length !== 0)) {
            throw new Error('Domain name already exists.');
        }

        const { data, error } = await supabase.from(SiteModel.tableName).insert({
            domain_name: domainName,
        }).select();

        if (error) {
            console.error('Error inserting site:', error);
            throw error;
        }

        return data;
    }

    /**
     * Retrieves all sites from the database.
     *
     * @returns {Promise<Array>} - An array of site objects.
     */
    async getAll() {
        const { data, error } = await supabase.from(SiteModel.tableName).select('*');

        if (error) {
            console.error('Error fetching sites:', error);
            throw error;
        }

        data.reverse(); // Reverse the order to show the most recent sites first

        return data;
    }

    /**
     * Retrieves a site by its ID.
     *
     * @param {number} id - The ID of the site.
     *
     * @returns {Promise<Object>} - The site object.
     */
    async getById(id) {
        const { data, error } = await supabase.from(SiteModel.tableName).select('*').eq('id', id).single();

        if (error) {
            console.error('Error fetching site by ID:', error);
            throw error;
        }

        return data;
    }

    /**
     * Retrieves a site by its domain name.
     *
     * @param {string} domainName - The domain name of the site.
     *
     * @returns {Promise<Object>} - The site object.
     */
    async getByDomainName(domainName) {
        const { data, error } = await supabase.from(SiteModel.tableName).select('*').eq('domain_name', domainName);

        if (error) {
            console.error('Error fetching site by domain name:', error);
            throw error;
        }

        return data;
    }

}

module.exports = SiteModel;