#include <GLES2/gl2.h>
#include <SDL.h>

#include "RButton.h"
#include "ShaderDepot.h"

RButton::RButton(int x, int y, int w, int h) {
	setRect(x, y, w, h);
	this->setColor(0.0, 0.0, 1.0);
	this->setFadeColor(1.0, 1.0, 1.0);
	this->lastPress = 0;
	this->shader = (RShader*) loadShader("RShader");
}

RButton::~RButton(void) {
}

void RButton::setRect(int x, int y, int w, int h) {
	vertices[0] = x;
	vertices[1] = y;
	vertices[2] = x + w;
	vertices[3] = y;
	vertices[4] = x + w;
	vertices[5] = y + h;
	vertices[6] = x;
	vertices[7] = y + h;
}

bool RButton::testHit(int x, int y) {
	bool r = (x > vertices[0] && x < vertices[2] && y > vertices[1] && y < vertices[5]);
	if (r)
		this->press();
	return r;
}

void RButton::press() {
	this->lastPress = SDL_GetTicks();
}

void RButton::update(int t) {
}

void RButton::draw(int t) {
	shader->useProgram();
	shader->setPositions(4, vertices);
	shader->setColor(&color);
	shader->setFadeColor(&fadeColor);

	int delta = t - lastPress;
	if (delta < PRESS_FADE)
		shader->setFade(1.0 - (GLfloat)delta / (GLfloat)PRESS_FADE);
	else
		shader->setFade(0.0);

	glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
}

void RButton::setColor(float r, float g, float b) {
	this->color.r = r;
	this->color.g = g;
	this->color.b = b;
	this->color.a = 1.0;
}

void RButton::setFadeColor(float r, float g, float b) {
	this->fadeColor.r = r;
	this->fadeColor.g = g;
	this->fadeColor.b = b;
	this->fadeColor.a = 1.0;
}