/* eslint-env qunit */
/* globals $, svgedit, equals */
/* eslint-disable no-var */
$(function () {
	// TODO(codedread): Write tests for handling history events.

	// Mocked out methods.
	svgedit.transformlist = {};
	svgedit.transformlist.removeElementFromListMap = function (elem) {};
	svgedit.utilities = {};
	svgedit.utilities.getHref = function (elem) { return '#foo'; };
	svgedit.utilities.setHref = function (elem, val) {};
	svgedit.utilities.getRotationAngle = function (elem) { return 0; };

	// log function
	QUnit.log = function (details) {
		if (window.console && window.console.log) {
			window.console.log(details.result + ' :: ' + details.message);
		}
	};

	var NS = svgedit.NS;
	// var svg = document.createElementNS(NS.SVG, 'svg');
	var undoMgr = null;
	var divparent = document.getElementById('divparent');
	var div1 = document.getElementById('div1');
	var div2 = document.getElementById('div2');
	var div3 = document.getElementById('div3');
	var div4 = document.getElementById('div4');
	var div5 = document.getElementById('div5');

	module('svgedit.history');

	var MockCommand = function (optText) { this.text_ = optText; };
	MockCommand.prototype.apply = function () {};
	MockCommand.prototype.unapply = function () {};
	MockCommand.prototype.getText = function () { return this.text_; };
	MockCommand.prototype.elements = function () { return []; };

	var MockHistoryEventHandler = function () {};
	MockHistoryEventHandler.prototype.handleHistoryEvent = function (eventType, command) {};

	function setUp () {
		undoMgr = new svgedit.history.UndoManager();
	}
	function tearDown () {
		undoMgr = null;
	}

	test('Test svgedit.history package', function () {
		expect(13);

		ok(svgedit.history);
		ok(svgedit.history.MoveElementCommand);
		ok(svgedit.history.InsertElementCommand);
		ok(svgedit.history.ChangeElementCommand);
		ok(svgedit.history.RemoveElementCommand);
		ok(svgedit.history.BatchCommand);
		ok(svgedit.history.UndoManager);
		equals(typeof svgedit.history.MoveElementCommand, typeof function () {});
		equals(typeof svgedit.history.InsertElementCommand, typeof function () {});
		equals(typeof svgedit.history.ChangeElementCommand, typeof function () {});
		equals(typeof svgedit.history.RemoveElementCommand, typeof function () {});
		equals(typeof svgedit.history.BatchCommand, typeof function () {});
		equals(typeof svgedit.history.UndoManager, typeof function () {});
	});

	test('Test UndoManager methods', function () {
		expect(14);
		setUp();

		ok(undoMgr);
		ok(undoMgr.addCommandToHistory);
		ok(undoMgr.getUndoStackSize);
		ok(undoMgr.getRedoStackSize);
		ok(undoMgr.resetUndoStack);
		ok(undoMgr.getNextUndoCommandText);
		ok(undoMgr.getNextRedoCommandText);

		equals(typeof undoMgr, typeof {});
		equals(typeof undoMgr.addCommandToHistory, typeof function () {});
		equals(typeof undoMgr.getUndoStackSize, typeof function () {});
		equals(typeof undoMgr.getRedoStackSize, typeof function () {});
		equals(typeof undoMgr.resetUndoStack, typeof function () {});
		equals(typeof undoMgr.getNextUndoCommandText, typeof function () {});
		equals(typeof undoMgr.getNextRedoCommandText, typeof function () {});

		tearDown();
	});

	test('Test UndoManager.addCommandToHistory() function', function () {
		expect(3);

		setUp();

		equals(undoMgr.getUndoStackSize(), 0);
		undoMgr.addCommandToHistory(new MockCommand());
		equals(undoMgr.getUndoStackSize(), 1);
		undoMgr.addCommandToHistory(new MockCommand());
		equals(undoMgr.getUndoStackSize(), 2);

		tearDown();
	});

	test('Test UndoManager.getUndoStackSize() and getRedoStackSize() functions', function () {
		expect(18);

		setUp();

		undoMgr.addCommandToHistory(new MockCommand());
		undoMgr.addCommandToHistory(new MockCommand());
		undoMgr.addCommandToHistory(new MockCommand());

		equals(undoMgr.getUndoStackSize(), 3);
		equals(undoMgr.getRedoStackSize(), 0);

		undoMgr.undo();
		equals(undoMgr.getUndoStackSize(), 2);
		equals(undoMgr.getRedoStackSize(), 1);

		undoMgr.undo();
		equals(undoMgr.getUndoStackSize(), 1);
		equals(undoMgr.getRedoStackSize(), 2);

		undoMgr.undo();
		equals(undoMgr.getUndoStackSize(), 0);
		equals(undoMgr.getRedoStackSize(), 3);

		undoMgr.undo();
		equals(undoMgr.getUndoStackSize(), 0);
		equals(undoMgr.getRedoStackSize(), 3);

		undoMgr.redo();
		equals(undoMgr.getUndoStackSize(), 1);
		equals(undoMgr.getRedoStackSize(), 2);

		undoMgr.redo();
		equals(undoMgr.getUndoStackSize(), 2);
		equals(undoMgr.getRedoStackSize(), 1);

		undoMgr.redo();
		equals(undoMgr.getUndoStackSize(), 3);
		equals(undoMgr.getRedoStackSize(), 0);

		undoMgr.redo();
		equals(undoMgr.getUndoStackSize(), 3);
		equals(undoMgr.getRedoStackSize(), 0);

		tearDown();
	});

	test('Test UndoManager.resetUndoStackSize() function', function () {
		expect(4);

		setUp();

		undoMgr.addCommandToHistory(new MockCommand());
		undoMgr.addCommandToHistory(new MockCommand());
		undoMgr.addCommandToHistory(new MockCommand());
		undoMgr.undo();

		equals(undoMgr.getUndoStackSize(), 2);
		equals(undoMgr.getRedoStackSize(), 1);

		undoMgr.resetUndoStack();

		equals(undoMgr.getUndoStackSize(), 0);
		equals(undoMgr.getRedoStackSize(), 0);

		tearDown();
	});

	test('Test UndoManager.getNextUndoCommandText() function', function () {
		expect(9);

		setUp();

		equals(undoMgr.getNextUndoCommandText(), '');

		undoMgr.addCommandToHistory(new MockCommand('First'));
		undoMgr.addCommandToHistory(new MockCommand('Second'));
		undoMgr.addCommandToHistory(new MockCommand('Third'));

		equals(undoMgr.getNextUndoCommandText(), 'Third');

		undoMgr.undo();
		equals(undoMgr.getNextUndoCommandText(), 'Second');

		undoMgr.undo();
		equals(undoMgr.getNextUndoCommandText(), 'First');

		undoMgr.undo();
		equals(undoMgr.getNextUndoCommandText(), '');

		undoMgr.redo();
		equals(undoMgr.getNextUndoCommandText(), 'First');

		undoMgr.redo();
		equals(undoMgr.getNextUndoCommandText(), 'Second');

		undoMgr.redo();
		equals(undoMgr.getNextUndoCommandText(), 'Third');

		undoMgr.redo();
		equals(undoMgr.getNextUndoCommandText(), 'Third');

		tearDown();
	});

	test('Test UndoManager.getNextRedoCommandText() function', function () {
		expect(8);

		setUp();

		equals(undoMgr.getNextRedoCommandText(), '');

		undoMgr.addCommandToHistory(new MockCommand('First'));
		undoMgr.addCommandToHistory(new MockCommand('Second'));
		undoMgr.addCommandToHistory(new MockCommand('Third'));

		equals(undoMgr.getNextRedoCommandText(), '');

		undoMgr.undo();
		equals(undoMgr.getNextRedoCommandText(), 'Third');

		undoMgr.undo();
		equals(undoMgr.getNextRedoCommandText(), 'Second');

		undoMgr.undo();
		equals(undoMgr.getNextRedoCommandText(), 'First');

		undoMgr.redo();
		equals(undoMgr.getNextRedoCommandText(), 'Second');

		undoMgr.redo();
		equals(undoMgr.getNextRedoCommandText(), 'Third');

		undoMgr.redo();
		equals(undoMgr.getNextRedoCommandText(), '');

		tearDown();
	});

	test('Test UndoManager.undo() and redo() functions', function () {
		expect(10);

		setUp();

		var lastCalled = null;
		var cmd1 = new MockCommand();
		var cmd2 = new MockCommand();
		var cmd3 = new MockCommand();
		cmd1.apply = function () { lastCalled = 'cmd1.apply'; };
		cmd2.apply = function () { lastCalled = 'cmd2.apply'; };
		cmd3.apply = function () { lastCalled = 'cmd3.apply'; };
		cmd1.unapply = function () { lastCalled = 'cmd1.unapply'; };
		cmd2.unapply = function () { lastCalled = 'cmd2.unapply'; };
		cmd3.unapply = function () { lastCalled = 'cmd3.unapply'; };

		undoMgr.addCommandToHistory(cmd1);
		undoMgr.addCommandToHistory(cmd2);
		undoMgr.addCommandToHistory(cmd3);

		ok(!lastCalled);

		undoMgr.undo();
		equals(lastCalled, 'cmd3.unapply');

		undoMgr.redo();
		equals(lastCalled, 'cmd3.apply');

		undoMgr.undo();
		undoMgr.undo();
		equals(lastCalled, 'cmd2.unapply');

		undoMgr.undo();
		equals(lastCalled, 'cmd1.unapply');
		lastCalled = null;

		undoMgr.undo();
		ok(!lastCalled);

		undoMgr.redo();
		equals(lastCalled, 'cmd1.apply');

		undoMgr.redo();
		equals(lastCalled, 'cmd2.apply');

		undoMgr.redo();
		equals(lastCalled, 'cmd3.apply');
		lastCalled = null;

		undoMgr.redo();
		ok(!lastCalled);

		tearDown();
	});

	test('Test MoveElementCommand', function () {
		expect(26);

		setUp();

		var move = new svgedit.history.MoveElementCommand(div3, div1, divparent);
		ok(move.unapply);
		ok(move.apply);
		equals(typeof move.unapply, typeof function () {});
		equals(typeof move.apply, typeof function () {});

		move.unapply();
		equals(divparent.firstElementChild, div3);
		equals(divparent.firstElementChild.nextElementSibling, div1);
		equals(divparent.lastElementChild, div2);

		move.apply();
		equals(divparent.firstElementChild, div1);
		equals(divparent.firstElementChild.nextElementSibling, div2);
		equals(divparent.lastElementChild, div3);

		move = new svgedit.history.MoveElementCommand(div1, null, divparent);

		move.unapply();
		equals(divparent.firstElementChild, div2);
		equals(divparent.firstElementChild.nextElementSibling, div3);
		equals(divparent.lastElementChild, div1);

		move.apply();
		equals(divparent.firstElementChild, div1);
		equals(divparent.firstElementChild.nextElementSibling, div2);
		equals(divparent.lastElementChild, div3);

		move = new svgedit.history.MoveElementCommand(div2, div5, div4);

		move.unapply();
		equals(divparent.firstElementChild, div1);
		equals(divparent.firstElementChild.nextElementSibling, div3);
		equals(divparent.lastElementChild, div3);
		equals(div4.firstElementChild, div2);
		equals(div4.firstElementChild.nextElementSibling, div5);

		move.apply();
		equals(divparent.firstElementChild, div1);
		equals(divparent.firstElementChild.nextElementSibling, div2);
		equals(divparent.lastElementChild, div3);
		equals(div4.firstElementChild, div5);
		equals(div4.lastElementChild, div5);

		tearDown();
	});

	test('Test InsertElementCommand', function () {
		expect(20);

		setUp();

		var insert = new svgedit.history.InsertElementCommand(div3);
		ok(insert.unapply);
		ok(insert.apply);
		equals(typeof insert.unapply, typeof function () {});
		equals(typeof insert.apply, typeof function () {});

		insert.unapply();
		equals(divparent.childElementCount, 2);
		equals(divparent.firstElementChild, div1);
		equals(div1.nextElementSibling, div2);
		equals(divparent.lastElementChild, div2);

		insert.apply();
		equals(divparent.childElementCount, 3);
		equals(divparent.firstElementChild, div1);
		equals(div1.nextElementSibling, div2);
		equals(div2.nextElementSibling, div3);

		insert = new svgedit.history.InsertElementCommand(div2);

		insert.unapply();
		equals(divparent.childElementCount, 2);
		equals(divparent.firstElementChild, div1);
		equals(div1.nextElementSibling, div3);
		equals(divparent.lastElementChild, div3);

		insert.apply();
		equals(divparent.childElementCount, 3);
		equals(divparent.firstElementChild, div1);
		equals(div1.nextElementSibling, div2);
		equals(div2.nextElementSibling, div3);

		tearDown();
	});

	test('Test RemoveElementCommand', function () {
		expect(22);

		setUp();

		var div6 = document.createElement('div');
		div6.id = 'div6';

		var remove = new svgedit.history.RemoveElementCommand(div6, null, divparent);
		ok(remove.unapply);
		ok(remove.apply);
		equals(typeof remove.unapply, typeof function () {});
		equals(typeof remove.apply, typeof function () {});

		remove.unapply();
		equals(divparent.childElementCount, 4);
		equals(divparent.firstElementChild, div1);
		equals(div1.nextElementSibling, div2);
		equals(div2.nextElementSibling, div3);
		equals(div3.nextElementSibling, div6);

		remove.apply();
		equals(divparent.childElementCount, 3);
		equals(divparent.firstElementChild, div1);
		equals(div1.nextElementSibling, div2);
		equals(div2.nextElementSibling, div3);

		remove = new svgedit.history.RemoveElementCommand(div6, div2, divparent);

		remove.unapply();
		equals(divparent.childElementCount, 4);
		equals(divparent.firstElementChild, div1);
		equals(div1.nextElementSibling, div6);
		equals(div6.nextElementSibling, div2);
		equals(div2.nextElementSibling, div3);

		remove.apply();
		equals(divparent.childElementCount, 3);
		equals(divparent.firstElementChild, div1);
		equals(div1.nextElementSibling, div2);
		equals(div2.nextElementSibling, div3);

		tearDown();
	});

	test('Test ChangeElementCommand', function () {
		expect(26);

		setUp();

		div1.setAttribute('title', 'new title');
		var change = new svgedit.history.ChangeElementCommand(div1,
			{'title': 'old title', 'class': 'foo'});
		ok(change.unapply);
		ok(change.apply);
		equals(typeof change.unapply, typeof function () {});
		equals(typeof change.apply, typeof function () {});

		change.unapply();
		equals(div1.getAttribute('title'), 'old title');
		equals(div1.getAttribute('class'), 'foo');

		change.apply();
		equals(div1.getAttribute('title'), 'new title');
		ok(!div1.getAttribute('class'));

		div1.textContent = 'inner text';
		change = new svgedit.history.ChangeElementCommand(div1,
			{'#text': null});

		change.unapply();
		ok(!div1.textContent);

		change.apply();
		equals(div1.textContent, 'inner text');

		div1.textContent = '';
		change = new svgedit.history.ChangeElementCommand(div1,
			{'#text': 'old text'});

		change.unapply();
		equals(div1.textContent, 'old text');

		change.apply();
		ok(!div1.textContent);

		// TODO(codedread): Refactor this #href stuff in history.js and svgcanvas.js
		var rect = document.createElementNS(NS.SVG, 'rect');
		var justCalled = null;
		var gethrefvalue = null;
		var sethrefvalue = null;
		svgedit.utilities.getHref = function (elem) {
			equals(elem, rect);
			justCalled = 'getHref';
			return gethrefvalue;
		};
		svgedit.utilities.setHref = function (elem, val) {
			equals(elem, rect);
			equals(val, sethrefvalue);
			justCalled = 'setHref';
		};

		gethrefvalue = '#newhref';
		change = new svgedit.history.ChangeElementCommand(rect,
			{'#href': '#oldhref'});
		equals(justCalled, 'getHref');

		justCalled = null;
		sethrefvalue = '#oldhref';
		change.unapply();
		equals(justCalled, 'setHref');

		justCalled = null;
		sethrefvalue = '#newhref';
		change.apply();
		equals(justCalled, 'setHref');

		var line = document.createElementNS(NS.SVG, 'line');
		line.setAttributeNS(null, 'class', 'newClass');
		change = new svgedit.history.ChangeElementCommand(line, {class: 'oldClass'});

		ok(change.unapply);
		ok(change.apply);
		equals(typeof change.unapply, typeof function () {});
		equals(typeof change.apply, typeof function () {});

		change.unapply();
		equals(line.getAttributeNS(null, 'class'), 'oldClass');

		change.apply();
		equals(line.getAttributeNS(null, 'class'), 'newClass');

		tearDown();
	});

	test('Test BatchCommand', function () {
		expect(13);

		setUp();

		var concatResult = '';
		MockCommand.prototype.apply = function () { concatResult += this.text_; };

		var batch = new svgedit.history.BatchCommand();
		ok(batch.unapply);
		ok(batch.apply);
		ok(batch.addSubCommand);
		ok(batch.isEmpty);
		equals(typeof batch.unapply, typeof function () {});
		equals(typeof batch.apply, typeof function () {});
		equals(typeof batch.addSubCommand, typeof function () {});
		equals(typeof batch.isEmpty, typeof function () {});

		ok(batch.isEmpty());

		batch.addSubCommand(new MockCommand('a'));
		ok(!batch.isEmpty());
		batch.addSubCommand(new MockCommand('b'));
		batch.addSubCommand(new MockCommand('c'));

		ok(!concatResult);
		batch.apply();
		equals(concatResult, 'abc');

		MockCommand.prototype.apply = function () {};
		MockCommand.prototype.unapply = function () { concatResult += this.text_; };
		concatResult = '';
		batch.unapply();
		equals(concatResult, 'cba');

		MockCommand.prototype.unapply = function () {};

		tearDown();
	});
});