#ifndef UI_BUTTON_H
#define UI_BUTTON_H

#include "UIElement.h"

class UIButton : public UIElement {

public:

	class Listener {
	public:
		virtual void onClick(UIButton*) = 0;
	};

private:

	bool enabled = true;

	const char* txt;
	uint8_t txtH;
	uint16_t txtW;
	bool down = false;

	const Color fillNormal = Color::fromRGB(180,180,180);
	const Color fillDown = Color::fromRGB(120,120,120);
	const Color frameBright = Color::fromRGB(230,230,230);
	const Color frameDark = Color::fromRGB(50,50,50);

	const Color cText = Color::fromRGB(0,0,0);
	const Color cTextDisabled = Color::fromRGB(140,140,140);

	Listener* listener = nullptr;

	static constexpr const char* TAG = "UIButton";

public:

	UIButton(const char* txt) : txt(txt) {
		txtW = fnt_f1.getWidth(txt);
		txtH = fnt_f1.getHeight();
	}

	void setText(const char* txt) {
		this->txt = txt;
	}
	const char* getText() const {
		return this->txt;
	}

	void setListener(Listener* l) {
		this->listener = l;
	}

	void setEnabled(const bool en) {
		this->enabled = en;
		setNeedsRedraw();
	}

	void draw(UIPainter& p) override {

		p.setFG( down ? fillDown : fillNormal );
		p.fillRect(rect);

		p.setFG( down ? frameDark : frameBright );
//		p.drawLine(rect.x,			rect.y,			rect.x+rect.w,	rect.y);		// top
//		p.drawLine(rect.x,			rect.y,			rect.x,			rect.y+rect.h);	// left
		p.drawLineHor(rect.x, rect.x+rect.w, rect.y);	// top
		p.drawLineVer(rect.y, rect.y+rect.h, rect.x);	// left;

		p.setFG( down ? frameBright : frameDark );
//		p.drawLine(rect.x,			rect.y+rect.h,	rect.x+rect.w,	rect.y+rect.h);	// bottom
//		p.drawLine(rect.x+rect.w,	rect.y,			rect.x+rect.w,	rect.y+rect.h);	// right
		p.drawLineHor(rect.x, rect.x+rect.w, rect.y+rect.h);	// bottom
		p.drawLineVer(rect.y, rect.y+rect.h, rect.x+rect.w);	// right;

		p.setFG( enabled ? cText : cTextDisabled );
		uint16_t o = down ? 1 : 0;
		p.drawText(rect.x+rect.w/2-txtW/2+o, rect.y+rect.h/2-txtH/2+o, txt);

	}

	void onTouchDown(const uint16_t, const uint16_t) override {
		ESP_LOGI(TAG, "onTouchDown()");
		if (!enabled) {return;}
		down = true;
		setNeedsRedraw();
	}
	void onTouchUp() override {
		if (!enabled) {return;}
		down = false;
		setNeedsRedraw();
		if (listener) {listener->onClick(this);}
	}

};

#endif // UI_BUTTON_H