/**
 * FancyUpload - Flash meets Ajax for simply working uploads
 *
 * @version		2.0 beta 4
 *
 * @license		MIT License
 *
 * @author		Harald Kirschner <mail [at] digitarald [dot] de>
 * @copyright	Authors
 */

var FancyUpload2 = new Class({

	Extends: Swiff.Uploader,

	options: {
		limitSize: false,
		limitFiles: 30,
		instantStart: true,
		allowDuplicates: false,
		validateFile: $lambda(true), // provide a function that returns true for valid and false for invalid files.

		fileInvalid: null, // called for invalid files with error stack as 2nd argument
		fileCreate: null, // creates file element after select
		fileUpload: null, // called when file is opened for upload, allows to modify the upload options (2nd argument) for every upload
		fileComplete: null, // updates the file element to completed state and gets the response (2nd argument)
		fileRemove: null, // removes the element
		clicker: null,
		/**
		 * Events:
		 * onSelect, onAllSelect, onCancel, onBeforeOpen, onOpen, onProgress, onComplete, onError, onAllComplete
		 */
		 status: null,
		 list: null,
		 ok: false
	},

	initialize: function(status, list, options) {
		this.status = $(status);
		this.list = $(list);

		this.files = [];

		if (options.callBacks) {
			this.addEvents(options.callBacks);
			options.callBacks = null;
		}
		this.parent(options);
		this.render();
	},

	render: function() {
		if ( this.status == null || this.list == null ) return;
		this.ok = true;
		
		this.overallTitle = this.status.getElement('.overall-title');
		this.currentTitle = this.status.getElement('.current-title');
		this.currentText = this.status.getElement('.current-text');

		var progress = this.status.getElement('.overall-progress');
		this.overallProgress = new Fx.ProgressBar(progress, {
			text: new Element('span', {'class': 'progress-text'}).inject(progress, 'after')
		});
		progress = this.status.getElement('.current-progress')
		this.currentProgress = new Fx.ProgressBar(progress, {
			text: new Element('span', {'class': 'progress-text'}).inject(progress, 'after')
		});
	},

	onLoad: function() {
		this.log('Uploader ready!');
		this.toggleBarDisplay('init');
	},

	onBeforeOpen: function(file, options) {
		this.log('Initialize upload for "{name}".', file);
		var fn = this.options.fileUpload;
		return (fn) ? fn.call(this, this.getFile(file), options) : null;
	},

	onOpen: function(file, overall) {
		this.log('Starting upload "{name}".', file);
		file = this.getFile(file);
		file.element.addClass('file-uploading');
		this.currentProgress.cancel().set(0);
		this.currentTitle.set('html', 'File Progress "{name}"'.substitute(file) );
	},

	onProgress: function(file, current, overall) {
		this.overallProgress.start(overall.bytesLoaded, overall.bytesTotal);
		this.currentText.set('html', 'Upload with {rate}/s. Time left: ~{timeLeft}'.substitute({
			rate: (current.rate) ? this.sizeToKB(current.rate) : '- B',
			timeLeft: Date.fancyDuration(current.timeLeft || 0)
		}));
		this.currentProgress.start(current.bytesLoaded, current.bytesTotal);
	},

	onSelect: function(file, index, length) {
		var errors = [];
		if (this.options.limitSize && (file.size > this.options.limitSize)) errors.push('size');
		if (this.options.limitFiles && (this.countFiles() >= this.options.limitFiles)) errors.push('length');
		if (!this.options.allowDuplicates && this.getFile(file)) errors.push('duplicate');
		if (!this.options.validateFile.call(this, file, errors)) errors.push('custom');
		if (errors.length) {
			var fn = this.options.fileInvalid;
			if (fn) fn.call(this, file, errors);
			return false;
		}
		(this.options.fileCreate || this.fileCreate).call(this, file);
		this.files.push(file);
		return true;
	},

	onAllSelect: function(files, current, overall) {
		this.log('Added ' + files.length + ' files, now we have (' + current.bytesTotal + ' bytes).', arguments);
		this.updateOverall(current.bytesTotal);
		this.status.removeClass('status-browsing');
		if (this.files.length && this.options.instantStart) this.upload.delay(10, this);
	},

	onComplete: function(file, response) {
		this.log('Completed upload "' + file.name + '".', arguments);
		this.currentText.set('html', 'Upload complete.');
		this.currentProgress.start(100);		
		(this.options.fileComplete || this.fileComplete).call(this, this.finishFile(file), response);
		
	},

	onError: function(file, error, info) {
		this.log('Upload "' + file.name + '" failed. "{1}": "{2}".', arguments);
		(this.options.fileError || this.fileError).call(this, this.finishFile(file), error, info);
	},

	onCancel: function() {
		this.log('Filebrowser cancelled.', arguments);
		this.status.removeClass('file-browsing');
	},

	onAllComplete: function(current) {
		this.log('Completed all files, ' + current.bytesTotal + ' bytes.', arguments);
		this.updateOverall(current.bytesTotal);
		this.overallProgress.start(100);
		this.status.removeClass('file-uploading');
		this.toggleBarDisplay('out');
	},
	
	disable: function() {
		var clicker = $(this.options.clicker);
		//this.oldClickerEvents = clicker.
		clicker.addClass('disabled');
		clicker.removeEvents('click');
		clicker.href = 'javascript:null';
		this.browse = $lambda(false);
		this.upload = $lambda(false);
	},
	
	enable: function() {
		alert('cannot be reenabled (not implemented)');
	},
	
	toggleBarDisplay: function(mode) {
		var progElem = $('fancyUpload-overallProgress');
		var outOpts = {
			'opacity':0,
			'height':0
		};
		var inOpts = {
			'opacity':1,
			'height':60
		};
		var r = 'toggleBarDisplay '+mode+' ';
		if ( progElem ) {
			if ( mode == 'init' ) {
				r += outOpts+' ';
				r += progElem.setStyles(outOpts);
			} else {
				if ( mode == 'in' ) {
					var opts = inOpts;
				} else {
					var opts = outOpts;
				}
				r += opts+' ';
				
				var myFx = new Fx.Morph(progElem,{duration:'long'});
				r += myFx.start(opts);
			}
			//alert('result of change was '+r);
		} else {
			this.log('No element ID#fancyUpload-overallProgress to alter.');
		}
	},

	browse: function(fileList) {
		var ret = this.parent(fileList);
		if (ret !== true){
			this.log('Browse in progress.');
			if (ret) alert(ret);
		} else {
			this.log('Browse started.');
			this.status.addClass('file-browsing');
		}
	},

	upload: function(options) {
		var ret = this.parent(options);
		if (ret !== true) {
			this.log('Upload in progress or nothing to upload.');
			if (ret) alert(ret);
		} else {
			this.log('Upload started.');
			this.status.addClass('file-uploading');
			this.overallProgress.set(0);
			this.toggleBarDisplay('in');
		}
	},

	removeFile: function(file) {
		var remove = this.options.fileRemove || this.fileRemove;
		if (!file) {
			this.files.each(remove, this);
			this.files.empty();
			this.updateOverall(0);
		} else {
			if (!file.element) file = this.getFile(file);
			this.files.erase(file);
			remove.call(this, file);
			this.updateOverall(this.bytesTotal - file.size);
		}
		this.parent(file);
	},

	getFile: function(file) {
		var ret = null;
		this.files.some(function(value) {
			if ((value.name != file.name) || (value.size != file.size)) return false;
			ret = value;
			return true;
		});
		return ret;
	},

	countFiles: function() {
		var ret = 0;
		for (var i = 0, j = this.files.length; i < j; i++) {
			if (!this.files[i].finished) ret++;
		}
		return ret;
	},

	updateOverall: function(bytesTotal) {
		this.bytesTotal = bytesTotal;
		this.overallTitle.set('html', 'Overall Progress (' + this.sizeToKB(bytesTotal) + ')');
	},

	finishFile: function(file) {
		file = this.getFile(file);
		file.element.removeClass('file-uploading');
		file.finished = true;
		return file;
	},

	fileCreate: function(file,statusClass,statusStr) {
		file.info = new Element('span', {'class': 'file-info'});
		
		var dispName = file.name;
		if ( dispName.length > 50 ) {
			dispName = dispName.substr( 0,50 ) + '&hellip;';
		}
		
		file.element = new Element('li', {'class': 'file'}).adopt(
			new Element('span', {'class': 'file-size', 'html': this.sizeToKB(file.size)}),
			new Element('a', {
				'class': 'file-remove',
				'href': '#',
				'html': 'Remove',
				'events': {
					'click': function() {
						this.removeFile(file);
						return false;
					}.bind(this)
				}
			}),
			new Element('span', {'class': 'file-name', 'html': dispName}),
			file.info
		).inject(this.list);
		
		if ( statusClass != undefined ) {
			this.fileMarkStatus(file, statusClass, statusStr);
		}
	},
	
	addPreviousFiles: function(fileParamList) {
		for( var i=0; i<fileParamList.length; i++ ) {
			this.fileCreate(fileParamList[i].file,fileParamList[i].statusClass,fileParamList[i].statusStr);
		}
	},
	
	/*
	javascript:alert(window.swiffy.addPreviousFiles([
		{file:{name:'booboo.html',size:232123},statusClass:'failed',statusStr:'no way!'},
		{file:{name:'gaga.html',size:232123},statusClass:'success',statusStr:'got the file!'},
		{file:{name:'mama.html',size:232123},statusClass:'failed',statusStr:'oh holy fucking shit!'},
		{file:{name:'dada.html',size:232123},statusClass:'success',statusStr:'4 k received OK baby!!'},
		{file:{name:'shishi.html',size:232123},statusClass:'failed',statusStr:'got the file!'},
		{file:{name:'bungbung.html',size:232123},statusClass:'success',statusStr:'got the file!'}
	]));
	*/
	
	fileMarkStatus: function(file,statusClass,statusStr) {
		file.element.addClass('file-'+statusClass);
		file.info.set('html', statusStr );
	},

	fileComplete: function(file, response) {
		this.options.processResponse || this
		var json = $H(JSON.decode(response, true));
		if (json.get('result') == 'success') {
			this.fileMarkStatus(file, 'success', json.get('size'));
		} else {
			this.fileMarkStatus(file, 'failed', json.get('error') || response );
		}
	},

	fileError: function(file, error, info) {
		file.element.addClass('file-failed');
		file.info.set('html', '<strong>' + error + '</strong><br />' + info);
	},

	fileRemove: function(file) {
		file.element.fade('out').retrieve('tween').chain(Element.destroy.bind(Element, file.element));
	},

	sizeToKB: function(size) {
		//var unit = 'B';
		var unit = 'k';
		var str = 'Zero';
		
		if ((size / 1048576) > 1) {
			//unit = 'MB';
			unit = 'Mb';
			size /= 1048576;
			str = size.round(1);
		} else if ((size / 1024) > 1) {
			//unit = 'kB';
			unit = 'k';
			size /= 1024;
			str = size.round(0);
		}
		return str + ' ' + unit;
	},

	log: function(text, args) {
		//if (window.console) console.log(text.substitute(args || {}));
	}

});

/**
 * @todo Clean-up, into Date.js
 */
Date.parseDuration = function(sec) {
	var units = {}, conv = Date.durations;
	for (var unit in conv) {
		var value = Math.floor(sec / conv[unit]);
		if (value) {
			units[unit] = value;
			if (!(sec -= value * conv[unit])) break;
		}
	}
	return units;
};

Date.fancyDuration = function(sec) {
	var ret = [], units = Date.parseDuration(sec);
	for (var unit in units) ret.push(units[unit] + Date.durationsAbbr[unit]);
	return ret.join(', ');
};

Date.durations = {years: 31556926, months: 2629743.83, days: 86400, hours: 3600, minutes: 60, seconds: 1, milliseconds: 0.001};
Date.durationsAbbr = {
	years: 'j',
	months: 'm',
	days: 'd',
	hours: 'h',
	minutes: 'min',
	seconds: 'sec',
	milliseconds: 'ms'
};