/*jslint browser: true */
/*global ace, jQuery */
/**
 * PHP Console
 *
 * A web-based php sandbox
 *
 * Copyright (C)
 * 2010, Jordi Boggiano <j.boggiano@seld.be>
 * 2015, Ondřej Hruška <ondra@ondrovo.com>
 *
 * Licensed under the new BSD License
 * See the LICENSE file for details
 *
 * Source on Github http://github.com/MightyPork/php-sandbox
 */
(function (require, $, ace) {
	"use strict";

	var updateStatusBar,
		handleSubmit,
		initializeAce,
		handleAjaxError,
		options,
		editor,
		Storage;

	options = {
		tabsize: 4,
		editor: 'editor'
	};

	Storage = new function() {
		this.saves = JSON.parse(localStorage.sbxSaves || '{}');
		this.active = localStorage.sbxActiveSlot || 'Scratch';

		this.getCode = function () {
			this._populSlot();
			this._persist();
			return this.saves[this.active];
		};

		this._persist = function () {
			localStorage.sbxActiveSlot = this.active;
			localStorage.sbxSaves = JSON.stringify(this.saves);
		};

		this.setCode = function(code) {
			this.saves[this.active] = code;
			this._persist();
		};

		this.deleteSave = function() {
			delete this.saves[this.active];
			var first = 'Scratch';
			for (first in this.saves) break;
			this.selectSlot(first);
		};

		this.storeCurrentCode = function () {
			var code = editor.getSession().getValue();
			this.setCode(code);
		};

		this._populSlot = function () {
			if (typeof(this.saves[this.active]) == 'undefined') {
				this.saves[this.active] = window.defcode;
			}
		};

		this.selectSlot = function(name) {
			this.active = name;
			this._populSlot();
			this._persist();

			initSlotSelect();
			editor.getSession().setValue(Storage.getCode());
		};
	};

	/**
	 * updates the text of the status bar
	 */
	updateStatusBar = function (e) {
		var cursor_position = editor.getCursorPosition();
		$('.statusbar .position').text('@ ' + (1 + cursor_position.row) + ':' + (1+cursor_position.column));
	};

	/**
	 * does an async request to eval the php code and displays the result
	 */
	handleSubmit = function (e) {
		e.preventDefault();
		//$('div.output').html('<img src="loader.gif" class="loader" alt="" /> Loading ...'); /* loader sucks */

		// store session
		Storage.storeCurrentCode();

		// eval server-side
		jQuery.ajax ({
			url: '?js=1',
			type: "POST",
			data: JSON.stringify({code: editor.getSession().getValue()}),
			dataType: "json",
			contentType: "application/json; charset=utf-8",

			success: function (res, status, jqXHR) {
				if (res.memory || res.duration) {
					$('.statusbar .runtime-info').text('Load: ' + res.memory + ' MB, ' + res.duration + ' ms');
				} else {
					$('.statusbar .runtime-info').text('');
				}

				var out = res.output;

				if (out.match(/#end-php-console-output#$/)) {
					out = out.substring(0, out.length - 24);
					$('div.output').text(out);
				} else {
					$('div.output').text(out + "\n\n*** Script ended unexpectedly. ***");
				}
			},

			error: function (event, jqxhr, settings, exception) {
				var txt = event.responseText;

				var is_dd = txt.indexOf('Sfdump = window.Sfdump') != -1;
				var err = txt.indexOf('error') != -1 && txt.indexOf('file') != -1 && txt.indexOf('line') != -1;

				if (is_dd && !err) {
					$('div.output').html(event.responseText);
				} else {
					$('div.output').html("<p><em>Error occured while posting your code.</em></p>" + event.responseText);
				}
			}
		});
	};

	initializeAce = function () {
		var PhpMode, code, storedCode;

		// reload last session
		code = Storage.getCode();

		$('#' + options.editor).replaceWith('<div id="' + options.editor + '" class="' + options.editor + '"></div>');
		$('#' + options.editor).text(code);

		editor = ace.edit(options.editor);
		editor.$blockScrolling = Infinity;

		editor.focus();
		editor.gotoLine(3, 0);
		editor.setTheme("ace/theme/monokai");
		editor.setOptions({
			showPrintMargin: false,
			fontSize: '18px',
			enableBasicAutocompletion: true
		});

		// set mode
		PhpMode = require("ace/mode/php").Mode;
		editor.getSession().setMode(new PhpMode());

		// tab size
		if (options.tabsize) {
			editor.getSession().setTabSize(options.tabsize);
			editor.getSession().setUseSoftTabs(true);
		} else {
			editor.getSession().setUseSoftTabs(false);
		}

		// events
		editor.getSession().selection.on('changeCursor', updateStatusBar);

		// commands
		editor.commands.addCommand({
			name: 'submitForm',
			bindKey: {
				win: 'Ctrl-Return|Alt-Return',
				mac: 'Command-Return|Alt-Return'
			},
			exec: function (editor) {
				$('form').submit();
			}
		});
	};

	var initSlotSelect = function () {
		var $ss = $('#saves').empty();

		$.each(Storage.saves, function(k, v) {
			var $opt = $('<option>');
			$opt.attr('value', k);
			$opt.text(k);
			if (Storage.active == k) $opt.attr('selected', true);
			$ss.append($opt);
		});
	};

	$.console = function (settings) {
		$.extend(options, settings);

		$(function () {
			$(document).ready(initializeAce);
			$('form').on('submit', handleSubmit);

			// make sure the slot is ready
			Storage.getCode();

			initSlotSelect();

			// Change slot (reload text)
			$('#saves').on('change', function () {
				Storage.storeCurrentCode();
				Storage.selectSlot($(this).val());
				editor.focus();
			});

			// New slot
			$('#btn-new').on('click', function () {
				var name = prompt("New slot name", moment().format('Y-MM-DD h:mm:ss'));
				if (name === null) return;

				Storage.selectSlot(name);
				// cursor to the bottom
				editor.getSession().selection.moveCursorFileEnd();
				editor.focus();
			});

			// Delete slot
			$('#btn-del').on('click', function () {
				if (!confirm("Delete save "+Storage.active+"?")) return;

				Storage.deleteSave();
				editor.focus();
			});

			// Rename
			$('#btn-ren').on('click', function () {
				var name = prompt("New name for slot " + Storage.active);
				if (name === null) return;

				if (typeof Storage.saves[name] != 'undefined') {
					alert("Name already used!");
					return;
				}

				Storage.saves[name] = Storage.saves[Storage.active];
				delete Storage.saves[Storage.active];
				Storage.selectSlot(name);
				editor.focus();
			});

			$.ajaxSetup({
				headers: {
					'X-CSRF-TOKEN': $('meta[name="_token"]').attr('content')
				}
			});
		});
	};
}(ace.require, jQuery, ace));