//   **************************************************************************
//   *                                                                        *
//   *  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 3 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, see <http://www.gnu.org/licenses/>. *
//   *                                                                        *
//   **************************************************************************

(function ($)
{
    var soundManagerExists = window['soundManager'] != undefined;
    var sound;

    $.coolType =
    {
        setup: function (options)
        {
            var defaultSettings = $.extend({
                speed: 25,
                caretChar: '\u2588',
                playSound: false,
                soundFile: null,
                volume: 100,
                onSoundLoaded: null,
                insertBefore: '',
                insertAfter: '',
                delayBefore: 0,
                delayAfter: 0,
                style: '',
                inline: false,
                caretBlinkSpeed: 300,
                scrollToBottom: false
            }, options)
            $(window).data('coolTypeDefaults', defaultSettings);

            if (defaultSettings.scrollToBottom && !$.scrollTo)
                throw 'You are missing a reference to the scrollTo jQuery plugin. Visit http://plugins.jquery.com/project/ScrollTo to obtain it.';

            if (!soundManagerExists && defaultSettings.soundFile)
                throw 'You are missing a reference to the sound manager script. Visit http://www.schillmania.com/projects/soundmanager2/ to obtain it.';
            else if (soundManagerExists && defaultSettings.soundFile)
                LoadSound(defaultSettings.soundFile, defaultSettings.volume, defaultSettings.onSoundLoaded);
        }
    }

    function LoadSound(soundFile, volume, callback)
    {
        if (sound != null)
            sound.destroy();
        soundManager.onready(function ()
        {
            sound = soundManager.createSound({
                id: 'coolType',
                url: soundFile,
                autoLoad: true,
                stream: true,
                multishot: true,
                loops: 999999999,
                volume: volume,
                onload: function ()
                {
                    callback();
                }
            });
            sound.load();
        });
    }

    $.fn.coolType = function (text, callback, options)
    {
        var $this = this;

        var defaultSettings = $(window).data('coolTypeDefaults');
        var settings = $.extend(defaultSettings, options);

        if (settings.scrollToBottom && !$.scrollTo)
            throw 'You are missing a reference to the scrollTo jQuery plugin. Visit http://plugins.jquery.com/project/ScrollTo to obtain it.';

        if (!settings.inline) $this.append('<div class="coolType" style="' + settings.style + '"></div>');
        else $this.append('<span class="coolType" style="' + settings.style + '"></span>');

        var $container = $this.find('.coolType:last-child');
        $container.data('coolTypeText', new String());
        $container.append(settings.insertBefore + '<span style="' + settings.style + '" class="coolTypeLineContainer"></span><span id="coolTypeCaret">' + settings.caretChar + '</span>' + settings.insertAfter);

        var $lineContainer = $container.find('.coolTypeLineContainer');
        var $caret = $container.find('#coolTypeCaret');

        function blinkCaret()
        {
            if ($caret.data('Visible')) hideCaret();
            else showCaret();
        }

        function showCaret()
        {
            $caret.data('Visible', true);
            $caret.html(settings.caretChar);
        }

        function hideCaret()
        {
            $caret.data('Visible', false);
            $caret.html('&nbsp;');
        }

        var blinkId = setInterval(blinkCaret, settings.caretBlinkSpeed);

        var index = 0;
        setTimeout(function ()
        {
            clearInterval(blinkId);
            showCaret();
            if (settings.playSound && sound != null)
                sound.play({ volume: settings.volume });
            var intervalId = setInterval(function ()
            {
                var char = text.substr(index, 1);
                if (index != text.length)
                {
                    var newText = $container.data('coolTypeText') + char;
                    $container.data('coolTypeText', newText);
                    $lineContainer.text(newText);
                    if (settings.scrollToBottom)
                        $this.scrollTo('100%', 0, { axis: 'y' });
                }
                else
                {
                    clearInterval(intervalId);
                    if (settings.playSound && sound != null)
                        sound.stop();
                    var blinkId = setInterval(blinkCaret, settings.caretBlinkSpeed);
                    setTimeout(function ()
                    {
                        clearInterval(blinkId);
                        $caret.remove();
                        if (callback) callback($this);
                    }, settings.delayAfter);
                }
                index++;
            }, settings.speed);
        }, settings.delayBefore);
    };

    $(function ()
    {
        $.coolType.setup();
    });
})(jQuery);