/*
 * Bittorrent Client using Qt and libtorrent.
 * Copyright (C) 2008  Christophe Dumez <chris@qbittorrent.org>
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * In addition, as a special exception, the copyright holders give permission to
 * link this program with the OpenSSL project's "OpenSSL" library (or with
 * modified versions of it that use the same license as the "OpenSSL" library),
 * and distribute the linked executables. You must obey the GNU General Public
 * License in all respects for all of the code used other than "OpenSSL".  If you
 * modify file(s), you may extend this exception to your version of the file(s),
 * but you are not obligated to do so. If you do not wish to do so, delete this
 * exception statement from your version.
 */

"use strict";

if (window.qBittorrent === undefined)
    window.qBittorrent = {};

window.qBittorrent.ProgressBar = (function() {
    const exports = function() {
        return {
            ProgressBar: ProgressBar
        };
    };

    let ProgressBars = 0;
    const ProgressBar = new Class({
        initialize: function(value, parameters) {
            const vals = {
                "id": "progressbar_" + (ProgressBars++),
                "value": [value, 0].pick(),
                "width": 0,
                "height": 0,
                "darkbg": "var(--color-background-blue)",
                "darkfg": "var(--color-text-white)",
                "lightbg": "var(--color-background-default)",
                "lightfg": "var(--color-text-default)"
            };
            if (parameters && (typeOf(parameters) === "object"))
                Object.append(vals, parameters);
            if (vals.height < 12)
                vals.height = 12;
            const obj = new Element("div", {
                "id": vals.id,
                "class": "progressbar_wrapper",
                "styles": {
                    "border": "1px solid var(--color-border-default)",
                    "width": vals.width,
                    "height": vals.height,
                    "position": "relative",
                    "margin": "0 auto"
                }
            });
            obj.vals = vals;
            obj.vals.value = [value, 0].pick();
            obj.vals.dark = new Element("div", {
                "id": vals.id + "_dark",
                "class": "progressbar_dark",
                "styles": {
                    "width": vals.width,
                    "height": vals.height,
                    "background": vals.darkbg,
                    "color": vals.darkfg,
                    "position": "absolute",
                    "text-align": "center",
                    "left": 0,
                    "top": 0,
                    "line-height": vals.height
                }
            });
            obj.vals.light = new Element("div", {
                "id": vals.id + "_light",
                "class": "progressbar_light",
                "styles": {
                    "width": vals.width,
                    "height": vals.height,
                    "background": vals.lightbg,
                    "color": vals.lightfg,
                    "position": "absolute",
                    "text-align": "center",
                    "left": 0,
                    "top": 0,
                    "line-height": vals.height
                }
            });
            obj.appendChild(obj.vals.dark);
            obj.appendChild(obj.vals.light);
            obj.getValue = ProgressBar_getValue;
            obj.setValue = ProgressBar_setValue;
            obj.setWidth = ProgressBar_setWidth;
            if (vals.width)
                obj.setValue(vals.value);
            else
                setTimeout('ProgressBar_checkForParent("' + obj.id + '")', 1);
            return obj;
        }
    });

    function ProgressBar_getValue() {
        return this.vals.value;
    }

    function ProgressBar_setValue(value) {
        value = parseFloat(value);
        if (isNaN(value))
            value = 0;
        value = Math.min(Math.max(value, 0), 100);
        this.vals.value = value;

        const displayedValue = `${value.round(1).toFixed(1)}%`;
        this.vals.dark.textContent = displayedValue;
        this.vals.light.textContent = displayedValue;

        const r = parseInt((this.vals.width * (value / 100)), 10);
        this.vals.dark.setStyle("clip", `rect(0, ${r}px, ${this.vals.height}px, 0)`);
        this.vals.light.setStyle("clip", `rect(0, ${this.vals.width}px, ${this.vals.height}px, ${r}px)`);
    }

    function ProgressBar_setWidth(value) {
        if (this.vals.width !== value) {
            this.vals.width = value;
            this.setStyle("width", value);
            this.vals.dark.setStyle("width", value);
            this.vals.light.setStyle("width", value);
            this.setValue(this.vals.value);
        }
    }

    function ProgressBar_checkForParent(id) {
        const obj = $(id);
        if (!obj)
            return;
        if (!obj.parentNode)
            return setTimeout('ProgressBar_checkForParent("' + id + '")', 1);
        obj.setStyle("width", "100%");
        const w = obj.offsetWidth;
        obj.vals.dark.setStyle("width", w);
        obj.vals.light.setStyle("width", w);
        obj.vals.width = w;
        obj.setValue(obj.vals.value);
    }

    return exports();
})();

Object.freeze(window.qBittorrent.ProgressBar);
