//  .___________________________________,       ___
//  |            /      |   |      .     \    .(___):
//  |        _______    |          :      \   :     |
//: |___/      /        |          |       \__|     |
//|           /         |          |          |     |
//l__________/__________|___|______l__________j_____j
//
//     Ansi/Ansi Viewer in Ecmascript
// Coded by Sir Garbagetruck / Accession 2013
// Uses fonts by DMG, http://trueschool.se
// Uses SixteenColors textmode js library for rendering

var Sahli = function() {
    this.outbox = $('div#outbox');
    this.dbox = $('div#drawbox');
    this.image = 0;

    // scroll speed of 5 looks ... "ok" on macbook pro. 4 was original.
    this.scroll_speed = 5;
    this.scroll_direction = 1;
    this.zoomspeed = 200;
    this.asciiasgfx = true; // changed at Evoke as the 16colors amiga bits aren't the same as old lib.
    // You need to submit your fixes/changes to them, truck...
    this.DEBUG = false;

    this.dbox.height(document.height - 24);
    this.dbox.width(document.width - 2);
    this.sizemult = 16; // 32 is larger than screen, and somewhat silly
    this.origheight = 0;
    this.origwidth = 0;
    this.filedata = '';
    this.slides = 0;
    this.currentpic = 0;
    this.nonfsheight = document.height - 40;

    this.loadpic = function(picdata, inserthere) {
        var infob = $('div.infobox');
        var pdiv = $('<div>');
        var canv = document.createElement('canvas');
        var req = new XMLHttpRequest();
        pdiv.addClass('scrolly');
        ref = this;
        if (picdata.amiga && this.asciiasgfx) {
            var ptxt = $('<pre></pre>');
            var color = this.calccolor(picdata.color);
            var bgcolor = this.calccolor(picdata.bg);
            ptxt.addClass(picdata.font.toLowerCase());
            ptxt.css({
                'color': color,
                'background-color': bgcolor,
                'margin': 'auto'
            });
            ptxt.width(picdata.width * 8);
            pdiv.width('100%');
            pdiv.append(ptxt);
            // x-user-defined
            req.overrideMimeType('text/plain; charset=ISO-8859-1');
            req.onreadystatechange = function() {
                if (req.readyState === req.DONE) {
                    if (req.status === 200 || req.status === 0) {
                        ptxt.text(this.responseText);
                        inserthere.after(pdiv);
                    } else {
                        // I really should make a real error handler.
                        alert(req);
                    }
                }
            };
            req.open('GET', picdata.file, true);
            req.send(null);

        } else {
            this.image = new ImageTextModeANSI();
            this.SAUCE = new ImageTextModeSAUCE();
            this.image.parseUrl(picdata.file);
            this.image.renderCanvas(canv);
            pdiv.append(canv);
            inserthere.after(pdiv);
            this.origwidth = canv.width;
            this.origheight = canv.height;
        }
        infob.find('h1').text(picdata.name);
        infob.find('h2').text(picdata.author);
        infob.find('h3#text').text(picdata.line1);
        infob.find('h3#text2').text(picdata.line2);
        infob.find('.bigtext').text(picdata.text);
        infob.find('span#filename').text(picdata.file);
        infob.find('span#infowidth').text("| " + picdata.width + " cols |");
        infob.find('span#fontname').text(picdata.font);
    };

    this.calccolor = function(colorset) {
        return 'rgba(' + colorset.toString() + ')';
    };

    this.resize = function(amt) {
        var canv = $('canvas');
        var w = canv.width() * amt;
        var h = canv.height() * amt;
        canv.animate({
            width: w,
            height: h
        }, this.zoomspeed);
    };

    this.fullwidth = function() {
        this.stopscroll();
        if ($('canvas').width() == this.dbox.width()) {
            this.originalsize(this.zoomspeed);
        } else {
            var ratio = this.origwidth / this.dbox.width();
            $('canvas').animate({
                width: this.dbox.width(),
                height: this.origheight / ratio
            }, this.zoomspeed);

        }
    };

    this.fullheight = function() {
        var canv = $('canvas');
        if (canv.height() == this.dbox.height()) {
            this.originalsize(this.zoomspeed);
        } else {
            var ratio = this.origheight / this.dbox.height();
            canv.animate({
                height: this.dbox.height(),
                width: this.origwidth / ratio
            }, this.zoomspeed);
        }
    };

    this.originalsize = function(zoomspeed) {
        // why do we not have origwidth now? hmm.
        var canv = $('canvas');
        canv.animate({
            width: this.origwidth,
            height: this.origheight
        }, this.zoomspeed);
    };


    this.toptext = function(text) {
        if (this.DEBUG) {
            $('h1#top').text(text);
        }
    };

    this.setscroll = function() {
        var bottom = $('.scrolly').height();
        var scrollto = bottom;
        var steps;
        // kill animations from before
        this.dbox.stop(true);
        if (this.scroll_direction === 1) {
            this.scroll_direction = -1;
            steps = bottom - this.dbox.scrollTop();
        } else {
            this.scroll_direction = 1;
            scrollto = 0;
            steps = this.dbox.scrollTop();
        }
        this.toptext(this.scroll_speed + ' | ' + steps);

        this.dbox.animate({
            scrollTop: scrollto
        }, this.scroll_speed * steps, 'linear');
    };

    this.resizedrawbox = function(height) {
        var dbox1 = $('div#drawbox');
        if ('undefined' === typeof height) {
            dbox1.height(window.innerHeight - 2);
        } else {
            dbox1.height(height);
        }
        dbox1.width(window.innerWidth - 2);
    };

    this.stopscroll = function() {
        this.dbox.stop(true);
    };

    this.moveabout = function(lines) {
        var line = this.dbox.scrollTop();
        this.dbox.stop(true);
        switch (lines) {
            case 0:
                this.dbox.scrollTop(0);
                break;
            case Infinity:
                this.dbox.scrollTop(this.origheight);
                break;
            default:
                this.dbox.scrollTop(line - lines * 8);
                break;
        }
    };

    this.requestsahlifile = function(url) {
        var ref = this;
        $.getJSON(url, function(json) {
            ref.filedata = json.filedata;
            ref.slides = json.slides;
            ref.buildcompo();
        });
    };


    this.buildcompo = function() {
        this.resizedrawbox();
        alert("SAHLI READY TO GO");
    };

    this.nextpic = function() {
        this.dbox.children().remove();
        // reset scrolling;
        this.stopscroll();
        this.scroll_direction = 1;
        var i = this.currentpic;
        var filedata = this.filedata;
        filedata[i].pic = $("<h6>" + filedata[i].file + "</h6>");
        this.dbox.append(filedata[i].pic);
        this.loadpic(filedata[i], filedata[i].pic);
        this.currentpic += 1;
        if (this.currentpic > filedata.length - 1) {
            this.currentpic = 0;
        }
    };


    this.gofullscreen = function() {
        var docElm = document.documentElement;
        var toid = window.setTimeout(sahli.resizedrawbox, 100);
        if (docElm.requestFullscreen) {
            docElm.requestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
        } else if (docElm.mozRequestFullScreen) {
            docElm.mozRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
        } else if (docElm.webkitRequestFullScreen) {
            docElm.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
        }

    };

    this.cancelfullscreen = function() {
        var toid = window.setTimeout(sahli.resizedrawbox, 100, this.nonfsheight);
        if (document.exitFullscreen) {
            document.exitFullscreen();
        } else if (document.mozCancelFullScreen) {
            document.mozCancelFullScreen();
        } else if (document.webkitCancelFullScreen) {
            document.webkitCancelFullScreen();
        }
    };

    this.fixhelpbox = function() {
        var h = $('.help');
        //        var xy = {'top': document.height/2 - h.height()/2, 'left': document.width/2 - h.width()/2};
        var xy = {
            'top': 0,
            'left': document.width / 2 - h.width() / 2
        };
        h.css(xy);
    };

    this.toggledebug = function() {
        $('h1#top').fadeToggle();
        this.DEBUG = (!this.DEBUG);
    };

    this.loadkeys = function() {
        var ref = this;
        $(document).bind('click', function(ev) {
            if (ev.clientY < 100) {
                if (ev.clientX < 100) {
                    ref.nextpic();
                } else {
                    ref.fullwidth();
                }
            } else {
                ref.setscroll();
            }
        });

        $(document).bind('keydown', function(ev) {
            switch (ev.which) {
                case 84: // t
                    ref.asciiasgfx = (!ref.asciiasgfx);
                    ref.toptext(ref.asciiasgfx);
                    break;
                case 85: // u
                case 9: // u
                    $('div.infobox').slideToggle('slow');
                    break;
                case 70: // f
                    ref.gofullscreen();
                    break;
                case 27: // esc
                case 71: // G, as escape seems to not get passed from fullscreen on chrome
                    ref.cancelfullscreen();
                    break;
                case 73: // i
                    ref.resize(2);
                    break;
                case 75: // k
                    ref.resize(0.5);
                    break;
                case 79: // o
                    ref.fullwidth();
                    break;
                case 76: // l
                    ref.fullheight();
                    break;
                case 80: // p
                    ref.originalsize(0);
                    break;

                case 83: // s
                    ref.setscroll();
                    break;
                case 72: // h
                case 191: // "?" (also / but no shift)
                    $('.help').fadeToggle('fast');
                    break;
                case 107: // +
                case 190: // .
                    ref.scroll_speed = ref.scroll_speed * 2;
                    ref.toptext("speed doubled:" + ref.scroll_speed);
                    break;
                case 109: // -
                case 188: // ,
                    ref.scroll_speed = ref.scroll_speed / 2;
                    ref.toptext("speed halved:" + ref.scroll_speed);
                    break;
                case 49: // 1
                    ref.scroll_speed = 1;
                    break;
                case 50: //2
                    ref.scroll_speed = 2;
                    break;
                case 51: //3
                    ref.scroll_speed = 3;
                    break;
                case 52: //4
                    ref.scroll_speed = 4;
                    break;
                case 53: //5
                    ref.scroll_speed = 5;
                    break;
                case 220: // "\"
                    ref.toptext(ref.scroll_speed);
                    break;
                case 8: // backspace
                case 68: // D
                    ref.stopscroll();
                    break;
                    // move about keys
                case 33: // pgup
                    ref.moveabout(24);
                    break;
                case 34: // pgdwn
                    ref.moveabout(-24);
                    break;
                case 36: // home
                    ref.moveabout(0);
                    break;
                case 35: // end
                    ref.moveabout(Infinity);
                    break;
                case 40: // down
                    ref.moveabout(-1);
                    break;
                case 32: // space
                    ref.nextpic();
                    break;
                case 38: // up
                    ref.moveabout(1);
                    break;
                case 19: // pause/break
                case 121: // F10
                    ref.toggledebug();
                    break;
                    // debug alerts for these keys are annoying (:
                case 116: // f5
                case 123: // f12
                    break;
                default:
                    if (ref.DEBUG) {
                        alert(ev.which);
                    }
                    break;
            }
        });
    };

    this.loadkeys();
    //    this.loadpic('h7-r2012.ans',this.dbox);
    this.fixhelpbox();
    var ref = this;
    $(window).resize(function() {
        ref.resizedrawbox();
    });
    this.requestsahlifile('list.sahli');

};

// I switched to Sublime text + sublemacs pro.
// Yes, the author of Sublime Text's emacs hatred is annoying.