/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM - Open Source CRM application.
 * Copyright (C) 2014-2022 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
 * Website: https://www.espocrm.com
 *
 * EspoCRM is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * EspoCRM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
 ************************************************************************/

define('number', [], function () {

    /**
     * A number util.
     *
     * @class
     * @name Class
     * @memberOf module:number
     *
     * @param {module:models/settings.Class} config A config.
     * @param {module:models/preferences.Class} preferences Preferences.
     */
    let NumberUtil = function (config, preferences) {
        /**
         * @private
         * @type {module:models/settings.Class}
         */
        this.config = config;

        /**
         * @private
         * @type {module:models/preferences.Class}
         */
        this.preferences = preferences;

        /**
         * A thousand separator.
         *
         * @private
         * @type {string|null}
         */
        this.thousandSeparator = null;

        /**
         * A decimal mark.
         *
         * @private
         * @type {string|null}
         */
        this.decimalMark = null;

        this.config.on('change', () => {
            this.thousandSeparator = null;
            this.decimalMark = null;
        });

        this.preferences.on('change', () => {
            this.thousandSeparator = null;
            this.decimalMark = null;
        });

        /**
         * A max decimal places.
         *
         * @private
         * @type {number}
         */
        this.maxDecimalPlaces = 10;
    };

    _.extend(NumberUtil.prototype, /** @lends module:number.Class# */{

        /**
         * Format an integer number.
         *
         * @param {number} value A value.
         * @returns {string}
         */
        formatInt: function (value) {
            if (value === null || value === undefined) {
                return '';
            }

            let stringValue = value.toString();

            stringValue = stringValue.replace(/\B(?=(\d{3})+(?!\d))/g, this.getThousandSeparator());

            return stringValue;
        },

        /**
         * Format a float number.
         *
         * @param {number} value A value.
         * @param {number} [decimalPlaces] Decimal places.
         * @returns {string}
         */
        formatFloat: function (value, decimalPlaces) {
            if (value === null || value === undefined) {
                return '';
            }

            if (decimalPlaces === 0) {
                value = Math.round(value);
            }
            else if (decimalPlaces) {
                value = Math.round(value * Math.pow(10, decimalPlaces)) / (Math.pow(10, decimalPlaces));
            }
            else {
                value = Math.round(
                    value * Math.pow(10, this.maxDecimalPlaces)) / (Math.pow(10, this.maxDecimalPlaces)
                );
            }

            var parts = value.toString().split('.');

            parts[0] = parts[0].replace(/\B(?=(\d{3})+(?!\d))/g, this.getThousandSeparator());

            if (decimalPlaces === 0) {
                return parts[0];
            }

            if (decimalPlaces) {
                let decimalPartLength = 0;

                if (parts.length > 1) {
                    decimalPartLength = parts[1].length;
                }
                else {
                    parts[1] = '';
                }

                if (decimalPlaces && decimalPartLength < decimalPlaces) {
                    let limit = decimalPlaces - decimalPartLength;

                    for (let i = 0; i < limit; i++) {
                        parts[1] += '0';
                    }
                }
            }

            return parts.join(this.getDecimalMark());
        },

        /**
         * @private
         * @returns {string}
         */
        getThousandSeparator: function () {
            if (this.thousandSeparator !== null) {
                return this.thousandSeparator;
            }

            let thousandSeparator = '.';

            if (this.preferences.has('thousandSeparator')) {
                thousandSeparator = this.preferences.get('thousandSeparator');
            }
            else if (this.config.has('thousandSeparator')) {
                thousandSeparator = this.config.get('thousandSeparator');
            }

            /**
             * A thousand separator.
             *
             * @private
             * @type {string|null}
             */
            this.thousandSeparator = thousandSeparator;

            return thousandSeparator;
        },

        /**
         * @private
         * @returns {string}
         */
        getDecimalMark: function () {
            if (this.decimalMark !== null) {
                return this.decimalMark;
            }

            let decimalMark = '.';

            if (this.preferences.has('decimalMark')) {
                decimalMark = this.preferences.get('decimalMark');
            }
            else {
                if (this.config.has('decimalMark')) {
                    decimalMark = this.config.get('decimalMark');
                }
            }

            /**
             * A decimal mark.
             *
             * @private
             * @type {string|null}
             */
            this.decimalMark = decimalMark;

            return decimalMark;
        },
    });

    return NumberUtil;
});