// Polyfill for Object.assign
"function"!=typeof Object.assign&&(Object.assign=function(a,b){"use strict";if(null==a)throw new TypeError("Cannot convert undefined or null to object");for(var c=Object(a),d=1;d<arguments.length;d++){var e=arguments[d];if(null!=e)for(var f in e)Object.prototype.hasOwnProperty.call(e,f)&&(c[f]=e[f])}return c});

// Polyfill for Array.isArray
Array.isArray||(Array.isArray=function(r){return"[object Array]"===Object.prototype.toString.call(r)});

// Polyfill for Array.prototype.map
Array.prototype.map||(Array.prototype.map=function(r){var t,n,o;if(null==this)throw new TypeError("this is null or not defined");var e=Object(this),i=e.length>>>0;if("function"!=typeof r)throw new TypeError(r+" is not a function");for(arguments.length>1&&(t=arguments[1]),n=new Array(i),o=0;o<i;){var a,p;o in e&&(a=e[o],p=r.call(t,a,o,e),n[o]=p),o++}return n});

// Polyfill for Array.prototype.every
Array.prototype.every||(Array.prototype.every=function(r,t){"use strict";var e,n;if(null==this)throw new TypeError("this is null or not defined");var o=Object(this),i=o.length>>>0;if("function"!=typeof r)throw new TypeError;for(arguments.length>1&&(e=t),n=0;n<i;){var y;if(n in o&&(y=o[n],!r.call(e,y,n,o)))return!1;n++}return!0});

// Polyfill for Array.prototype.find
Array.prototype.find||(Array.prototype.find=function(r){if(null===this)throw new TypeError("Array.prototype.find called on null or undefined");if("function"!=typeof r)throw new TypeError("callback must be a function");for(var n=Object(this),t=n.length>>>0,o=arguments[1],e=0;e<t;e++){var f=n[e];if(r.call(o,f,e,n))return f}});

// Polyfill for Array.prototype.filter
Array.prototype.filter||(Array.prototype.filter=function(r){"use strict";if(void 0===this||null===this)throw new TypeError;var t=Object(this),e=t.length>>>0;if("function"!=typeof r)throw new TypeError;for(var i=[],o=arguments.length>=2?arguments[1]:void 0,n=0;n<e;n++)if(n in t){var f=t[n];r.call(o,f,n,t)&&i.push(f)}return i});

// Polyfill for Array.prototype.forEach
Array.prototype.forEach||(Array.prototype.forEach=function(a,b){var c,d;if(null===this)throw new TypeError(" this is null or not defined");var e=Object(this),f=e.length>>>0;if("function"!=typeof a)throw new TypeError(a+" is not a function");for(arguments.length>1&&(c=b),d=0;d<f;){var g;d in e&&(g=e[d],a.call(c,g,d,e)),d++}});

// Polyfill for Array.prototype.includes
Array.prototype.includes||(Array.prototype.includes=function(r,t){if(null==this)throw new TypeError('"this" is null or not defined');var e=Object(this),n=e.length>>>0;if(0===n)return!1;for(var i=0|t,o=Math.max(i>=0?i:n-Math.abs(i),0);o<n;){if(function(r,t){return r===t||"number"==typeof r&&"number"==typeof t&&isNaN(r)&&isNaN(t)}(e[o],r))return!0;o++}return!1});

// Polyfill for JSON
"object"!=typeof JSON&&(JSON={}),function(){"use strict";function f(a){return a<10?"0"+a:a}function this_value(){return this.valueOf()}function quote(a){return rx_escapable.lastIndex=0,rx_escapable.test(a)?'"'+a.replace(rx_escapable,function(a){var b=meta[a];return"string"==typeof b?b:"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})+'"':'"'+a+'"'}function str(a,b){var c,d,e,f,h,g=gap,i=b[a];switch(i&&"object"==typeof i&&"function"==typeof i.toJSON&&(i=i.toJSON(a)),"function"==typeof rep&&(i=rep.call(b,a,i)),typeof i){case"string":return quote(i);case"number":return isFinite(i)?String(i):"null";case"boolean":case"null":return String(i);case"object":if(!i)return"null";if(gap+=indent,h=[],"[object Array]"===Object.prototype.toString.apply(i)){for(f=i.length,c=0;c<f;c+=1)h[c]=str(c,i)||"null";return e=0===h.length?"[]":gap?"[\n"+gap+h.join(",\n"+gap)+"\n"+g+"]":"["+h.join(",")+"]",gap=g,e}if(rep&&"object"==typeof rep)for(f=rep.length,c=0;c<f;c+=1)"string"==typeof rep[c]&&(d=rep[c],(e=str(d,i))&&h.push(quote(d)+(gap?": ":":")+e));else for(d in i)Object.prototype.hasOwnProperty.call(i,d)&&(e=str(d,i))&&h.push(quote(d)+(gap?": ":":")+e);return e=0===h.length?"{}":gap?"{\n"+gap+h.join(",\n"+gap)+"\n"+g+"}":"{"+h.join(",")+"}",gap=g,e}}var rx_one=/^[\],:{}\s]*$/,rx_two=/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,rx_three=/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,rx_four=/(?:^|:|,)(?:\s*\[)+/g,rx_escapable=/[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,rx_dangerous=/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;"function"!=typeof Date.prototype.toJSON&&(Date.prototype.toJSON=function(){return isFinite(this.valueOf())?this.getUTCFullYear()+"-"+f(this.getUTCMonth()+1)+"-"+f(this.getUTCDate())+"T"+f(this.getUTCHours())+":"+f(this.getUTCMinutes())+":"+f(this.getUTCSeconds())+"Z":null},Boolean.prototype.toJSON=this_value,Number.prototype.toJSON=this_value,String.prototype.toJSON=this_value);var gap,indent,meta,rep;"function"!=typeof JSON.stringify&&(meta={"\b":"\\b","\t":"\\t","\n":"\\n","\f":"\\f","\r":"\\r",'"':'\\"',"\\":"\\\\"},JSON.stringify=function(a,b,c){var d;if(gap="",indent="","number"==typeof c)for(d=0;d<c;d+=1)indent+=" ";else"string"==typeof c&&(indent=c);if(rep=b,b&&"function"!=typeof b&&("object"!=typeof b||"number"!=typeof b.length))throw new Error("JSON.stringify");return str("",{"":a})}),"function"!=typeof JSON.parse&&(JSON.parse=function(text,reviver){function walk(a,b){var c,d,e=a[b];if(e&&"object"==typeof e)for(c in e)Object.prototype.hasOwnProperty.call(e,c)&&(d=walk(e,c),void 0!==d?e[c]=d:delete e[c]);return reviver.call(a,b,e)}var j;if(text=String(text),rx_dangerous.lastIndex=0,rx_dangerous.test(text)&&(text=text.replace(rx_dangerous,function(a){return"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})),rx_one.test(text.replace(rx_two,"@").replace(rx_three,"]").replace(rx_four,"")))return j=eval("("+text+")"),"function"==typeof reviver?walk({"":j},""):j;throw new SyntaxError("JSON.parse")})}();

function last(array) {
	return array[array.length - 1];
}

function identity(x) { return x; }

function toArray(list) {
	var result = [];
	for (var i = 0; i < list.length; i++) {
		result.push(list[i]);
	}
	return result;
}

function toArrayBase1(list) {
	var result = [];
	for (var i = 1; i <= list.length; i++) {
		result.push(list[i]);
	}
	return result;
}

// Checks whether scripts are allowed to write files by creating and deleting a dummy file
function canWriteFiles() {
	try {
		var file = new File();
		file.open('w');
		file.writeln('');
		file.close();
		file.remove();
		return true;
	} catch (e) {
		return false;
	}
}

// On Windows, this is C:\ProgramData
var settingsFilePath = Folder.appData.fullName + '/rhubarb-ae-settings.json';

function readSettingsFile() {
	var file = new File(settingsFilePath);
	try {
		file.open('r');
		return JSON.parse(file.read());
	} catch (e) {
		return {};
	} finally {
		file.close();
	}
}

function writeSettingsFile(settings) {
	try {
		var file = new File(settingsFilePath);
		file.open('w');
		file.write(JSON.stringify(settings, null, 2));
	} catch (e) {
		alert('Error persisting settings. ' + e.message);
	} finally {
		file.close();
	}
}

// ExtendScript's resource strings are a pain to write.
// This function allows them to be written in JSON notation, then converts them into the required
// format.
// For instance, this string: '{ "__type__": "StaticText", "text": "Hello world" }'
// is converted to this: 'StaticText { "text": "Hello world" }'.
// This code relies on the fact that, contrary to the language specification, all major JavaScript
// implementations keep object properties in insertion order.
function createResourceString(tree) {
	var result = JSON.stringify(tree, null, 2);
	result = result.replace(/(\{\s*)"__type__":\s*"(\w+)",?\s*/g, '$2 $1');
	return result;
}

// Object containing functions to create control description trees.
// For instance, `controls.StaticText({ text: 'Hello world' })`
// returns `{ __type__: StaticText, text: 'Hello world' }`.
var controlFunctions = (function() {
	var controlTypes = [
		// Strangely, 'dialog' and 'palette' need to start with a lower-case character
		['Dialog', 'dialog'], ['Palette', 'palette'],
		'Panel', 'Group', 'TabbedPanel', 'Tab', 'Button', 'IconButton', 'Image', 'StaticText',
		'EditText', 'Checkbox', 'RadioButton', 'Progressbar', 'Slider', 'Scrollbar', 'ListBox',
		'DropDownList', 'TreeView', 'ListItem', 'FlashPlayer'
	];
	var result = {};
	controlTypes.forEach(function(type){
		var isArray = Array.isArray(type);
		var key = isArray ? type[0] : type;
		var value = isArray ? type[1] : type;
		result[key] = function(options) {
			return Object.assign({ __type__: value }, options);
		};
	});
	return result;
})();

// Returns the path of a project item within the project
function getItemPath(item) {
	if (item === app.project.rootFolder) {
		return '/';
	}
	
	var result = item.name;
	while (item.parentFolder !== app.project.rootFolder) {
		result = item.parentFolder.name + ' / ' + result;
		item = item.parentFolder;
	}
	return '/ ' + result;
}

// Selects the item within an item control whose text matches the specified text.
// If no such item exists, selects the first item, if present.
function selectByTextOrFirst(itemControl, text) {
	var targetItem = toArray(itemControl.items).find(function(item) {
		return item.text === text;
	});
	if (!targetItem && itemControl.items.length) {
		targetItem = itemControl.items[0];
	}
	if (targetItem) {
		itemControl.selection = targetItem;
	}
}

function getWaveFileProjectItems() {
	var result = toArrayBase1(app.project.items).filter(function(item) {
		var isAudioFootage = item instanceof FootageItem && item.hasAudio && !item.hasVideo;
		if (!isAudioFootage) return false;
		
		var isWaveFile = item.file && item.file.exists && item.file.name.match(/\.wav$/i);
		return isWaveFile;
	});
	return result;
}

function createDialogWindow() {
	var resourceString;
	with (controlFunctions) {
		resourceString = createResourceString(
			Dialog({
				text: 'Rhubarb Lip-Sync',
				settings: Group({
					orientation: 'column',
					alignChildren: ['left', 'top'],
					audioFile: Group({
						label: StaticText({
							text: 'Audio file:',
							// If I don't explicitly activate a control, After Effects has trouble
							// with keyboard focus, so I can't type in the text edit field below.
							active: true
						}),
						value: DropDownList({
							helpTip: 'An audio file containing recorded dialog.\n'
								+ 'This field shows all audio files of type .wav that exist in '
								+ 'your After Effects project.'
						})
					}),
					dialogText: Group({
						label: StaticText({ text: 'Dialog text (optional):' }),
						value: EditText({
							properties: { multiline: true },
							characters: 60,
							minimumSize: [0, 100],
							helpTip: 'For better animation results, you can specify the text of '
								+ 'the recording here. This field is optional.'
						})
					}),
					mouthComp: Group({
						label: StaticText({ text: 'Mouth composition:' }),
						value: DropDownList({
							helpTip: 'A composition containing the mouth shapes, one drawing per '
								+ 'frame. They must be arranged as follows:\n'
								+ '00:00\tA\n'
								+ '00:01\tB\n'
								+ '00:02\tC\n'
								+ '00:03\tD\n'
								+ '00:04\tE\n'
								+ '00:05\tF\n'
								+ '00:06\tG (optional)\n'
								+ '00:07\tH (optional)\n'
								+ '00:08\tX (optional)'
						})
					}),
					extendedMouthShapes: Group({
						label: StaticText({ text: 'Extended mouth shapes:' }),
						g: Checkbox({
							text: 'G',
							helpTip: 'Controls whether to use the optional G shape.'
						}),
						h: Checkbox({
							text: 'H',
							helpTip: 'Controls whether to use the optional H shape.'
						}),
						x: Checkbox({
							text: 'X',
							helpTip: 'Controls whether to use the optional X shape.'
						}),
					}),
					targetFolder: Group({
						label: StaticText({ text: 'Target folder:' }),
						value: DropDownList({
							helpTip: 'The project folder in which to create the animation '
								+ 'composition. The composition will be named like the audio file.'
						})
					}),
					frameRate: Group({
						label: StaticText({ text: 'Frame rate:' }),
						value: EditText({
							characters: 8,
							helpTip: 'The frame rate for the animation.'
						}),
						auto: Checkbox({
							text: 'From mouth composition',
							helpTip: 'If checked, the animation will use the same frame rate as '
								+ 'the mouth composition.'
						})
					})
				}),
				separator: Group({ preferredSize: ['', 3] }),
				buttons: Group({
					alignment: 'right',
					animate: Button({
						properties: { name: 'ok' },
						text: 'Animate'
					}),
					cancel: Button({
						properties: { name: 'cancel' },
						text: 'Cancel'
					})
				})
			})
		);
	}

	// Create window and child controls
	var window = new Window(resourceString);
	var controls = {
		audioFile: window.settings.audioFile.value,
		dialogText: window.settings.dialogText.value,
		mouthComp: window.settings.mouthComp.value,
		mouthShapeG: window.settings.extendedMouthShapes.g,
		mouthShapeH: window.settings.extendedMouthShapes.h,
		mouthShapeX: window.settings.extendedMouthShapes.x,
		targetFolder: window.settings.targetFolder.value,
		frameRate: window.settings.frameRate.value,
		autoFrameRate: window.settings.frameRate.auto,
		animateButton: window.buttons.animate,
		cancelButton: window.buttons.cancel
	};
	
	// Add audio file options
	getWaveFileProjectItems().forEach(function(projectItem) {
		var listItem = controls.audioFile.add('item', getItemPath(projectItem));
		listItem.projectItem = projectItem;
	});
	
	// Add mouth composition options
	var comps = toArrayBase1(app.project.items).filter(function (item) {
		return item instanceof CompItem;
	});
	comps.forEach(function(projectItem) {
		var listItem = controls.mouthComp.add('item', getItemPath(projectItem));
		listItem.projectItem = projectItem;
	});

	// Add target folder options
	var projectFolders = toArrayBase1(app.project.items).filter(function (item) {
		return item instanceof FolderItem;
	});
	projectFolders.unshift(app.project.rootFolder);
	projectFolders.forEach(function(projectFolder) {
		var listItem = controls.targetFolder.add('item', getItemPath(projectFolder));
		listItem.projectItem = projectFolder;
	});

	// Load persisted settings
	var settings = readSettingsFile();
	selectByTextOrFirst(controls.audioFile, settings.audioFile);
	controls.dialogText.text = settings.dialogText || '';
	selectByTextOrFirst(controls.mouthComp, settings.mouthComp);
	controls.mouthShapeG.value = settings.extendedMouthShapes.g;
	controls.mouthShapeH.value = settings.extendedMouthShapes.h;
	controls.mouthShapeX.value = settings.extendedMouthShapes.x;
	selectByTextOrFirst(controls.targetFolder, settings.targetFolder);
	controls.frameRate.text = settings.frameRate || '';
	controls.autoFrameRate.value = settings.autoFrameRate;

	// Align controls
	window.onShow = function() {
		// Give uniform width to all labels
		var groups = toArray(window.settings.children);
		var labelWidths = groups.map(function(group) { return group.children[0].size.width; });
		var maxLabelWidth = Math.max.apply(Math, labelWidths);
		groups.forEach(function (group) {
			group.children[0].size.width = maxLabelWidth;
		});

		// Give uniform width to inputs
		var valueWidths = groups.map(function(group) {
			return last(group.children).bounds.right - group.children[1].bounds.left;
		});
		var maxValueWidth = Math.max.apply(Math, valueWidths);
		groups.forEach(function (group) {
			var multipleControls = group.children.length > 2;
			if (!multipleControls) {
				group.children[1].size.width = maxValueWidth;
			}
		});

		window.layout.layout(true);
	};

	var updating = false;

	function update() {
		if (updating) return;
		
		updating = true;
		try {
			// Handle auto frame rate
			var autoFrameRate = controls.autoFrameRate.value;
			controls.frameRate.enabled = !autoFrameRate;
			if (autoFrameRate) {
				// Take frame rate from mouth comp
				var mouthComp = (controls.mouthComp.selection || {}).projectItem;
				controls.frameRate.text = mouthComp ? mouthComp.frameRate : '';
			} else {
				// Sanitize frame rate
				var sanitizedFrameRate = controls.frameRate.text.match(/\d*\.?\d*/)[0];
				if (sanitizedFrameRate !== controls.frameRate.text) {
					controls.frameRate.text = sanitizedFrameRate;
				}
			}
			
			// Store settings
			var settings = {
				audioFile: (controls.audioFile.selection || {}).text,
				dialogText: controls.dialogText.text,
				mouthComp: (controls.mouthComp.selection || {}).text,
				extendedMouthShapes: {
					g: controls.mouthShapeG.value,
					h: controls.mouthShapeH.value,
					x: controls.mouthShapeX.value
				},
				targetFolder: (controls.targetFolder.selection || {}).text,
				frameRate: Number(controls.frameRate.text),
				autoFrameRate: controls.autoFrameRate.value
			};
			writeSettingsFile(settings);
		} finally {
			updating = false;
		}
	}

	// Handle changes
	update();
	controls.audioFile.onChange = update;
	controls.dialogText.onChanging = update;
	controls.mouthComp.onChange = update;
	controls.mouthShapeG.onClick = update;
	controls.mouthShapeH.onClick = update;
	controls.mouthShapeX.onClick = update;
	controls.targetFolder.onChange = update;
	controls.frameRate.onChanging = update;
	controls.autoFrameRate.onClick = update;
	
	// Handle animation
	controls.animateButton.onClick = function() {
		// TODO: validate
		app.beginUndoGroup('Rhubarb Lip-Sync');
		window.close();
		// TODO: animate
		app.endUndoGroup();
	};
	
	// Handle cancelation
	controls.cancelButton.onClick = function() {
		window.close();
	};

	return window;
}

function checkPreconditions() {
	if (!canWriteFiles()) {
		Window.alert('This script requires file system access.\n\n'
			+ 'Please enable Preferences > General > Allow Scripts to Write Files and Access Network.',
			'Rhubarb Lip-Sync', true);
		return false;
	}
	return true;
}

if (checkPreconditions()) {
	createDialogWindow().show();
}