var mexui = {};

// data initialization
mexui.Entity = {};
mexui.Component = {};
mexui.Control = {};
mexui.Entry = {};

mexui.windows = [];

mexui.fonts = {};
mexui.images = {};

mexui.focusedControl = null;
mexui.hoveredComponent = null;

// initialization
mexui.init = function () {
	mexui.native.loadImage('mexui/Images/down-arrow.png', 'downArrow');
	mexui.bindEvents();
	mexui.startTimers();
};

// events
mexui.bindEvents = function () {
	addEventHandler('onMouseDown', function (event, mouse, button) {
		var e = mexui.triggerEvent('onMouseDown', { button: button });
		if (!e.clickedAControl) {
			mexui.focusedControl = null;
		}
	});

	addEventHandler('onMouseUp', function (event, mouse, button) {
		mexui.triggerEvent('onMouseUp', { button: button });
	});

	addEventHandler('onMouseMove', function (event, mouse, isAbsolute, position) {
		if (isAbsolute)
			return;

		mexui.triggerEvent('onMouseMove', new Vec2(position.x, position.y), true);
	});

	addEventHandler('onMouseWheel', function (event, mouse, offset, flipped) {
		mexui.triggerEvent('onMouseWheel', offset);
	});

	addEventHandler('onKeyDown', function (event, key, pkey, mods) {
		mexui.triggerEvent('onKeyDown', key, mods);

		if (key == SDLK_TAB) {
			mexui.cycleFocusedControl();
		}
	});

	addEventHandler('onCharacter', function (event, character) {
		mexui.triggerEvent('onCharacter', character);

		if (character == 't' || character == 'T') {
			var textInput = mexui.getFocusedTextInput();
			if (textInput) {
				//event.preventDefault();
			}
		}
	});

	{
		var eventName = (game.game == VRR_GAME_GTA_SA || game.game == VRR_GAME_MAFIA_ONE) ? 'onDrawnHUD' : 'onBeforeDrawHUD';
		addEventHandler(eventName, function (event) {
			mexui.render();
		});
	}
};

mexui.unbindEvents = function () {
	removeEventHandler('onMouseDown');
	removeEventHandler('onMouseUp');
	removeEventHandler('onMouseMove');
	removeEventHandler('onMouseWheel');
	removeEventHandler('onKeyDown');
	removeEventHandler('onCharacter');
	removeEventHandler('onBeforeDrawHUD');
};

// timers
mexui.startTimers = function () {
	setInterval(mexui.toggleTextInputCaretShownForBlink, 400);
};

// render
mexui.render = function () {
	for (var i in mexui.windows) {
		if (mexui.windows[i].shown)
			mexui.windows[i].render.call(mexui.windows[i]);
	}
	for (var i in mexui.windows) {
		if (mexui.windows[i].shown)
			mexui.windows[i].renderAfter.call(mexui.windows[i]);
	}
};

// model
mexui.triggerEvent = function (eventName, data, callBaseMethodFirst) {
	var e = new mexui.Component.Event();

	if (data.button !== undefined)
		e.button = data.button;

	var windows = mexui.windows.slice(0, mexui.windows.length).reverse();
	for (var i in windows) {
		if (windows[i].shown) {
			if (callBaseMethodFirst) {
				if (mexui.Entity.Component.prototype[eventName]) {
					mexui.Entity.Component.prototype[eventName].call(windows[i], e, data);
					if (e.used)
						break;
				}

				windows[i][eventName].call(windows[i], e, data);
				if (e.used)
					break;
			}
			else {
				windows[i][eventName].call(windows[i], e, data);
				if (e.used)
					break;

				if (mexui.Entity.Component.prototype[eventName]) {
					mexui.Entity.Component.prototype[eventName].call(windows[i], e, data);
					if (e.used)
						break;
				}
			}
		}
	}
	return e;
};

mexui.getTopWindow = function () {
	for (var i = mexui.windows.length - 1, j = 0; i >= j; i--) {
		if (mexui.windows[i].shown)
			return mexui.windows[i];
	}
	return null;
};

mexui.getShownWindows = function () {
	var shownWindows = [];
	for (var i = mexui.windows.length - 1, j = 0; i >= j; i--) {
		if (mexui.windows[i].shown)
			shownWindows.push(mexui.windows[i]);
	}
	return shownWindows;
};

mexui.getNextShownWindows = function (afterWindow) {
	var shownWindows = mexui.getShownWindows();

	var windowIndex = shownWindows.indexOf(afterWindow);

	var windows2 = shownWindows.splice(0, windowIndex + 1);
	var args = windows2;
	args.unshift(0);
	args.unshift(shownWindows.length);
	shownWindows.splice.apply(shownWindows, args);

	return shownWindows;
};

mexui.cycleFocusedControl = function () {
	// no windows are created
	if (mexui.windows.length == 0)
		return;

	// no control is focused
	if (!mexui.focusedControl) {
		var topWindow = mexui.getTopWindow();
		if (!topWindow)
			return;

		mexui.focusedControl = topWindow.getFirstShownControl();
		return;
	}

	// a control is focused
	var focusedControlWindow = mexui.focusedControl.window;
	var nextControl = focusedControlWindow.getNextShownControl(mexui.focusedControl);
	if (nextControl) {
		mexui.focusedControl = nextControl;
		return;
	}

	// set focus to first control on next window that has a control shown
	var shownWindows = mexui.getNextShownWindows(focusedControlWindow);
	for (var i in shownWindows) {
		var window = shownWindows[i];
		var firstControl = window.getFirstShownControl();
		if (firstControl) {
			mexui.focusedControl = firstControl;
			return;
		}
	}
};

mexui.getFocusedTextInput = function () {
	if (!mexui.focusedControl)
		return null;

	if (!(mexui.focusedControl instanceof mexui.Control.TextInput))
		return null;

	return mexui.focusedControl;
};

mexui.toggleTextInputCaretShownForBlink = function () {
	var textInput = mexui.getFocusedTextInput();
	if (!textInput)
		return;

	textInput.caretShownForBlink = !textInput.caretShownForBlink;
};

mexui.setHoveredComponent = function (component) {
	//component.hovered = true;
	mexui.hoveredComponent = component;
};

mexui.clearHoveredComponent = function () {
	//mexui.hoveredComponent.hovered = false;
	mexui.hoveredComponent = null;
};

// api
mexui.window = function (x, y, w, h, title, styles) {
	var window = new mexui.Component.Window(x, y, w, h, title, styles);
	mexui.windows.push(window);
	return window;
};

mexui.isAnyWindowShown = function () {
	for (var i in mexui.windows) {
		if (mexui.windows[i].shown)
			return true;
	}
	return false;
};

mexui.setInput = function (showInput) {
	gui.showCursor(showInput, !showInput);

	if (localClient.player && game.game >= GAME_GTA_IV) {
		if (showInput)
			game.setCameraLookAtEntity(new Vec3(game.cameraMatrix.m41, game.cameraMatrix.m42, game.cameraMatrix.m43), localPlayer, false);
		else
			game.restoreCamera(false);
	}
};