module examples.arsd;

import std.datetime : Clock;

import arsd.simpledisplay;
import arsd.nanovega;
import nanogui.arsdbackend : ArsdBackend;

class MyGui : ArsdBackend
{
	this(int w, int h, string title)
	{
		super(w, h, title);
	}

	override void onVisibleForTheFirstTime()
	{
		import nanogui.screen : Screen;
		import nanogui.widget, nanogui.theme, nanogui.checkbox, nanogui.label, 
			nanogui.common, nanogui.window, nanogui.layout, nanogui.button,
			nanogui.popupbutton, nanogui.entypo, nanogui.popup, nanogui.vscrollpanel,
			nanogui.combobox, nanogui.textbox;
		
		{
			auto window = new Window(screen, "Button demo");
			window.position(Vector2i(15, 15));
			window.size = Vector2i(screen.size.x - 30, screen.size.y - 30);
			window.layout(new GroupLayout());

			new Label(window, "Push buttons", "sans-bold");

			auto checkbox = new CheckBox(window, "Checkbox #1", (bool value){ simple_window.redrawOpenGlSceneNow(); });
			checkbox.position = Vector2i(100, 190);
			checkbox.size = checkbox.preferredSize(ctx);
			checkbox.checked = true;

			auto label = new Label(window, "Label");
			label.position = Vector2i(100, 300);
			label.size = label.preferredSize(ctx);

			Popup popup;

			auto btn = new Button(window, "Button");
			btn.callback = () { 
				popup.children[0].visible = !popup.children[0].visible; 
				label.caption = popup.children[0].visible ? 
					"Popup label is visible" : "Popup label isn't visible";
			};

			auto popupBtn = new PopupButton(window, "PopupButton", Entypo.ICON_EXPORT);
			popup = popupBtn.popup;
			popup.layout(new GroupLayout());
			new Label(popup, "Arbitrary widgets can be placed here");
			new CheckBox(popup, "A check box", null);

			window.tooltip = "Button demo tooltip";
		}

		{
			auto window = new Window(screen, "Button group example");
			window.position(Vector2i(220, 15));
			window.layout(new GroupLayout());

			auto buttonGroup = ButtonGroup();

			auto btn = new Button(window, "RadioButton1");
			btn.flags = Button.Flags.RadioButton;
			btn.buttonGroup = buttonGroup;
			btn.tooltip = "Radio button ONE";
			buttonGroup ~= btn;

			btn = new Button(window, "RadioButton2");
			btn.flags = Button.Flags.RadioButton;
			btn.buttonGroup = buttonGroup;
			btn.tooltip = "Radio button TWO";
			buttonGroup ~= btn;

			btn = new Button(window, "RadioButton3");
			btn.flags = Button.Flags.RadioButton;
			btn.buttonGroup = buttonGroup;
			btn.tooltip = "Radio button THREE";
			buttonGroup ~= btn;

			window.tooltip = "Radio button group tooltip";
		}

		{
			auto window = new Window(screen, "Button with image window");
			window.position(Vector2i(400, 15));
			window.layout(new GroupLayout());

			auto image = ctx.createImage("resources/icons/start.jpeg", [NVGImageFlags.ClampToBorderX, NVGImageFlags.ClampToBorderY]);
			auto btn = new Button(window, "Start", image);
			// some optional height, not font size, not icon height
			btn.fixedHeight = 130;

			// yet another Button with the same image but default size
			new Button(window, "Start", image);

			window.tooltip = "Window with button that has image as an icon";
		}

		{
			auto window = new Window(screen, "Combobox window");
			window.position(Vector2i(600, 15));
			window.layout(new GroupLayout());

			new Label(window, "Message dialog", "sans-bold");
			import std.algorithm : map;
			import std.range : iota;
			import std.array : array;
			import std.conv : text;
			auto items = 15.iota.map!(a=>text("items", a)).array;
			auto cb = new ComboBox(window, items);
			cb.cursor = Cursor.Hand;
			cb.tooltip = "This widget has custom cursor value - Cursor.Hand";

			window.tooltip = "Window with ComboBox tooltip";
		}

		{
			int width      = 400;
			int half_width = width / 2;
			int height     = 200;

			auto window = new Window(screen, "All Icons");
			window.position(Vector2i(0, 400));
			window.fixedSize(Vector2i(width, height));

			// attach a vertical scroll panel
			auto vscroll = new VScrollPanel(window);
			vscroll.fixedSize(Vector2i(width, height));

			// vscroll should only have *ONE* child. this is what `wrapper` is for
			auto wrapper = new Widget(vscroll);
			wrapper.fixedSize(Vector2i(width, height));
			wrapper.layout(new GridLayout());// defaults: 2 columns

			foreach(i; 0..100)
			{
				import std.conv : text;
				auto item = new Button(wrapper, "item" ~ i.text, Entypo.ICON_AIRCRAFT_TAKE_OFF);
				item.iconPosition(Button.IconPosition.Left);
				item.fixedWidth(half_width);
			}
		}

		{
			auto asian_theme = new Theme(ctx);

			{
				// sorta hack because loading font in ctx results in
				// conflicting font id
				auto nvg2 = nvgCreateContext(NVGContextFlag.Debug);
				scope(exit) nvg2.kill;
				nvg2.createFont("chihaya", "./resources/fonts/n_chihaya_font.ttf");
				ctx.addFontsFrom(nvg2);
				asian_theme.mFontNormal = ctx.findFont("chihaya");
			}

			auto window = new Window(screen, "Textbox window");
			window.position = Vector2i(750, 15);
			window.fixedSize = Vector2i(200, 350);
			window.layout(new GroupLayout());
			window.tooltip = "Window with TextBoxes";

			auto tb = new TextBox(window, "Россия");
			tb.editable = true;

			tb = new TextBox(window, "England");
			tb.editable = true;

			tb = new TextBox(window, "日本");
			tb.theme = asian_theme;
			tb.editable = true;

			tb = new TextBox(window, "中国");
			tb.theme = asian_theme;
			tb.editable = true;
		}
		
		// now we should do layout manually yet
		screen.performLayout(ctx);
	}
}

void main () {
	
	auto gui = new MyGui(1000, 800, "Nanogui using arsd.simpledisplay");
	gui.run();
}