package kernel.ui;

import util.Color;
import util.Signal;
import kernel.ui.WindowManager.ButtonType;
import util.Vec.Vec2;
import lib.TermWriteable;

class WindowContext implements TermWriteable {
    private final writer:VirtualTermWriter;

    private final _clickSignal:Signal<{button: ButtonType, pos: Vec2<Int>}> = new Signal();
    private final _keySignal:Signal<{keyCode: Int, isHeld: Bool}> = new Signal();
    private final _keyUpSignal:Signal<Int> = new Signal();
    private final _mouseDragSignal:Signal<{button: ButtonType, pos: Vec2<Int>}> = new Signal();
    private final _mouseScrollSignal:Signal<{dir: Int,pos: Vec2<Int>}> = new Signal();
    private final _mouseUpSignal:Signal<{button: ButtonType,pos: Vec2<Int>}> = new Signal();
    private final _pasteSignal:Signal<String> = new Signal(); 

    public var clickSignal(get,null):SignalReadonly<{button: ButtonType, pos: Vec2<Int>}>;
    public var keySignal(get,null):SignalReadonly<{keyCode: Int, isHeld: Bool}>;
    public var keyUpSignal(get,null):SignalReadonly<Int>;
    public var mouseDragSignal(get,null):SignalReadonly<{button: ButtonType, pos: Vec2<Int>}>;
    public var mouseScrollSignal(get,null):SignalReadonly<{dir: Int,pos: Vec2<Int>}>;
    public var mouseUpSignal(get,null):SignalReadonly<{button: ButtonType,pos: Vec2<Int>}>;
    public var pasteSignal(get,null):SignalReadonly<String> ;

    public function new(writer: VirtualTermWriter) {
        this.writer = writer;
    }

    public var onResize(get, null):SignalReadonly<Vec2<Int>>;

	function get_onResize():SignalReadonly<Vec2<Int>> {
		return writer.onResize;
	}

    @:allow(kernel.ui)
    private function setTarget(target: TermWriteable) {
        writer.setTarget(target);
    }

    @:allow(kernel.ui)
    private function enable() {
        writer.enable();
    }

    @:allow(kernel.ui)
    private function disable() {
        writer.disable();
    }

    @:allow(kernel.ui)
    private function isEnabled() {
        return writer.isEnabled();
    }

    public function get_clickSignal(){
        return _clickSignal;
    }

    public function get_keySignal(){
        return _keySignal;
    }

    public function get_keyUpSignal(){
        return _keyUpSignal;
    }

    public function get_mouseDragSignal(){
        return _mouseDragSignal;
    }

    public function get_mouseScrollSignal(){
        return _mouseScrollSignal;
    }

    public function get_mouseUpSignal(){
        return _mouseUpSignal;
    }

    public function get_pasteSignal(){
        return _pasteSignal;
    }

    @:allow(kernel.ui.WindowManager) // Package private
    private function click(button:ButtonType ,pos: Vec2<Int>) {
        _clickSignal.emit({button: button,pos: pos});
    }

    @:allow(kernel.ui.WindowManager) // Package private
    private function key(keyCode: Int, isHeld: Bool) {
        _keySignal.emit({keyCode: keyCode,isHeld: isHeld});
    }

    @:allow(kernel.ui.WindowManager) // Package private
    private function keyUp(keyCode: Int) {
        _keyUpSignal.emit(keyCode);
    }

    @:allow(kernel.ui.WindowManager) // Package private
    private function mouseDrag(button: ButtonType, pos: Vec2<Int>) {
        _mouseDragSignal.emit({button: button,pos: pos});
    }

    @:allow(kernel.ui.WindowManager) // Package private
    private function mouseScroll(dir: Int,pos: Vec2<Int>) {
        _mouseScrollSignal.emit({dir: dir,pos: pos});
    }

    @:allow(kernel.ui.WindowManager) // Package private
    private function mouseUp(button: ButtonType,pos: Vec2<Int>) {
        _mouseUpSignal.emit({button: button,pos: pos});
    }

    @:allow(kernel.ui.WindowManager) // Package private
    private function paste(text: String) {
        _pasteSignal.emit(text);
    }

	public function write(text:String) {
        writer.write(text);
    }

	public function scroll(y:Int) {
        writer.scroll(y);
    }

	public function getCursorPos():Vec2<Int> {
		return writer.getCursorPos();
	}

	public function setCursorPos(x:Int, y:Int) {
        writer.setCursorPos(x,y);
    }

	public function getCursorBlink():Bool {
		return writer.getCursorBlink();
	}

	public function setCursorBlink(blink:Bool) {
        writer.setCursorBlink(blink);
    }

	public function getSize():Vec2<Int> {
		return writer.getSize();
	}

	public function clear() {
        writer.clear();
    }

	public function clearLine() {
        writer.clearLine();
    }

	public function getTextColor():Color {
		return writer.getTextColor();
	}

	public function setTextColor(colour:Color) {
        writer.setTextColor(colour);
    }

	public function getBackgroundColor():Color {
		return writer.getBackgroundColor();
	}

	public function setBackgroundColor(color:Color) {
        writer.setBackgroundColor(color);
    }

	public function isColor():Bool {
		return writer.isColor();
	}
}