'use strict';

const misc = require('../util/misc.js');
const PoolList = require('../models/pool_list.js');
const AutoCompleteControl = require('./auto_complete_control.js');

function _poolListToMatches(pools, options) {
    return [...pools].sort((pool1, pool2) => {
        return pool2.postCount - pool1.postCount;
    }).map(pool => {
        let cssName = misc.makeCssName(pool.category, 'pool');
        const caption = (
            '<span class="' + cssName + '">'
            + misc.escapeHtml(pool.names[0] + ' (' + pool.postCount + ')')
            + '</span>');
        return {
            caption: caption,
            value: pool,
        };
    });
}

class PoolAutoCompleteControl extends AutoCompleteControl {
    constructor(input, options) {
        const minLengthForPartialSearch = 3;

        options.getMatches = text => {
            const term = misc.escapeSearchTerm(text);
            const query = (
                text.length < minLengthForPartialSearch
                ? term + '*'
                : '*' + term + '*') + ' sort:post-count';

            return new Promise((resolve, reject) => {
                PoolList.search(
                    query, 0, this._options.maxResults,
                    ['id', 'names', 'category', 'postCount', 'version'])
                .then(
                    response => resolve(
                        _poolListToMatches(response.results, this._options)),
                    reject);
            });
        };

        super(input, options);
    }
};

module.exports = PoolAutoCompleteControl;