/**
 * WindowManager.js
 *
 * Released under LGPL License.
 * Copyright (c) 1999-2015 Ephox Corp. All rights reserved
 *
 * License: http://www.tinymce.com/license
 * Contributing: http://www.tinymce.com/contributing
 */

/**
 * This class handles the creation of native windows and dialogs. This class can be extended to provide for example inline dialogs.
 *
 * @class tinymce.WindowManager
 * @example
 * // Opens a new dialog with the file.htm file and the size 320x240
 * // It also adds a custom parameter this can be retrieved by using tinyMCEPopup.getWindowArg inside the dialog.
 * tinymce.activeEditor.windowManager.open({
 *    url: 'file.htm',
 *    width: 320,
 *    height: 240
 * }, {
 *    custom_param: 1
 * });
 *
 * // Displays an alert box using the active editors window manager instance
 * tinymce.activeEditor.windowManager.alert('Hello world!');
 *
 * // Displays an confirm box and an alert message will be displayed depending on what you choose in the confirm
 * tinymce.activeEditor.windowManager.confirm("Do you want to do something", function(s) {
 *    if (s)
 *       tinymce.activeEditor.windowManager.alert("Ok");
 *    else
 *       tinymce.activeEditor.windowManager.alert("Cancel");
 * });
 */
define("tinymce/WindowManager", [
	"tinymce/ui/Window",
	"tinymce/ui/MessageBox"
], function(Window, MessageBox) {
	return function(editor) {
		var self = this, windows = [];

		function getTopMostWindow() {
			if (windows.length) {
				return windows[windows.length - 1];
			}
		}

		self.windows = windows;

		editor.on('remove', function() {
			var i = windows.length;

			while (i--) {
				windows[i].close();
			}
		});

		/**
		 * Opens a new window.
		 *
		 * @method open
		 * @param {Object} args Optional name/value settings collection contains things like width/height/url etc.
		 * @option {String} title Window title.
		 * @option {String} file URL of the file to open in the window.
		 * @option {Number} width Width in pixels.
		 * @option {Number} height Height in pixels.
		 * @option {Boolean} autoScroll Specifies whether the popup window can have scrollbars if required (i.e. content
		 * larger than the popup size specified).
		 */
		self.open = function(args, params) {
			var win;

			editor.editorManager.setActive(editor);

			args.title = args.title || ' ';

			// Handle URL
			args.url = args.url || args.file; // Legacy
			if (args.url) {
				args.width = parseInt(args.width || 320, 10);
				args.height = parseInt(args.height || 240, 10);
			}

			// Handle body
			if (args.body) {
				args.items = {
					defaults: args.defaults,
					type: args.bodyType || 'form',
					items: args.body
				};
			}

			if (!args.url && !args.buttons) {
				args.buttons = [
					{text: 'Ok', subtype: 'primary', onclick: function() {
						win.find('form')[0].submit();
					}},

					{text: 'Cancel', onclick: function() {
						win.close();
					}}
				];
			}

			win = new Window(args);
			windows.push(win);

			win.on('close', function() {
				var i = windows.length;

				while (i--) {
					if (windows[i] === win) {
						windows.splice(i, 1);
					}
				}

				if (!windows.length) {
					editor.focus();
				}
			});

			// Handle data
			if (args.data) {
				win.on('postRender', function() {
					this.find('*').each(function(ctrl) {
						var name = ctrl.name();

						if (name in args.data) {
							ctrl.value(args.data[name]);
						}
					});
				});
			}

			// store args and parameters
			win.features = args || {};
			win.params = params || {};

			// Takes a snapshot in the FocusManager of the selection before focus is lost to dialog
			if (windows.length === 1) {
				editor.nodeChanged();
			}

			return win.renderTo().reflow();
		};

		/**
		 * Creates a alert dialog. Please don't use the blocking behavior of this
		 * native version use the callback method instead then it can be extended.
		 *
		 * @method alert
		 * @param {String} message Text to display in the new alert dialog.
		 * @param {function} callback Callback function to be executed after the user has selected ok.
		 * @param {Object} scope Optional scope to execute the callback in.
		 * @example
		 * // Displays an alert box using the active editors window manager instance
		 * tinymce.activeEditor.windowManager.alert('Hello world!');
		 */
		self.alert = function(message, callback, scope) {
			MessageBox.alert(message, function() {
				if (callback) {
					callback.call(scope || this);
				} else {
					editor.focus();
				}
			});
		};

		/**
		 * Creates a confirm dialog. Please don't use the blocking behavior of this
		 * native version use the callback method instead then it can be extended.
		 *
		 * @method confirm
		 * @param {String} messageText to display in the new confirm dialog.
		 * @param {function} callback Callback function to be executed after the user has selected ok or cancel.
		 * @param {Object} scope Optional scope to execute the callback in.
		 * @example
		 * // Displays an confirm box and an alert message will be displayed depending on what you choose in the confirm
		 * tinymce.activeEditor.windowManager.confirm("Do you want to do something", function(s) {
		 *    if (s)
		 *       tinymce.activeEditor.windowManager.alert("Ok");
		 *    else
		 *       tinymce.activeEditor.windowManager.alert("Cancel");
		 * });
		 */
		self.confirm = function(message, callback, scope) {
			MessageBox.confirm(message, function(state) {
				callback.call(scope || this, state);
			});
		};

		/**
		 * Closes the top most window.
		 *
		 * @method close
		 */
		self.close = function() {
			if (getTopMostWindow()) {
				getTopMostWindow().close();
			}
		};

		/**
		 * Returns the params of the last window open call. This can be used in iframe based
		 * dialog to get params passed from the tinymce plugin.
		 *
		 * @example
		 * var dialogArguments = top.tinymce.activeEditor.windowManager.getParams();
		 *
		 * @method getParams
		 * @return {Object} Name/value object with parameters passed from windowManager.open call.
		 */
		self.getParams = function() {
			return getTopMostWindow() ? getTopMostWindow().params : null;
		};

		/**
		 * Sets the params of the last opened window.
		 *
		 * @method setParams
		 * @param {Object} params Params object to set for the last opened window.
		 */
		self.setParams = function(params) {
			if (getTopMostWindow()) {
				getTopMostWindow().params = params;
			}
		};

		/**
		 * Returns the currently opened window objects.
		 *
		 * @method getWindows
		 * @return {Array} Array of the currently opened windows.
		 */
		self.getWindows = function() {
			return windows;
		};
	};
});
