#include <cstdio>
#include <pugl/pugl.h>
#include "pui.h"

PUi::~PUi()
{
	delete this->widget;
}

void PUi::OnReshape(int w, int h)
{
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	glViewport(0, 0, w, h);
	glOrtho(0, w, h, 0, 0, 1);
	glMatrixMode(GL_MODELVIEW);
	glDisable(GL_DEPTH_TEST);
	glLoadIdentity();
}

void PUi::OnDisplay()
{
	if (!this->initialised) this->InitTextures();

	glClear(GL_COLOR_BUFFER_BIT);
	this->widget->OnPaint();
}

void PUi::OnMotion(int x, int y)
{
	if (!this->mb) {
		/* No button */
		Widget *w = this->widget->GetWidget(x, y);
		if (this->active != w) {
			if (this->active) this->active->active = false;
			this->active = w;
			if (this->active) this->active->active = true;
			this->Repaint();
		}
		return;
	}

	if (this->active && this->mb == 2) {
		/* Left button drag */
		float value = this->active->GetNewValue(x, y);
		if (this->active->SetValue(value)) {
			this->ParameterChanged(this->active);
			this->Repaint();
		}
	}
}

void PUi::OnMouse(int button, bool press, int x, int y)
{
	/* Keep track of button state */
	if (press) {
		this->mb |= (1 << button);
	} else {
		this->mb &= ~(1 << button);
	}

	if (!this->mb) {
		/* No button press, check for widget focus change */
		Widget *w = this->widget->GetWidget(x, y);
		if (this->active != w) {
			if (this->active) this->active->active = false;
			this->active = w;
			if (this->active) this->active->active = true;
			this->Repaint();
		}
		return;
	}

	if (this->active) {
		/* RMB, zero value */
		float value = (this->mb & 8) ? 0 : this->active->GetNewValue(x, y);
		if (this->active->SetValue(value)) {
			this->ParameterChanged(this->active);
			this->Repaint();
		}
	}
}

void PUi::OnScroll(float dx, float dy)
{
	if (this->active) {
		float value = this->active->value + (dy * .1f);
		if (this->active->SetValue(value)) {
			this->ParameterChanged(this->active);
			this->Repaint();
		}
	}
}

static void onReshape(PuglView *view, int width, int height)
{
	PUi *pui = (PUi *)puglGetHandle(view);
	pui->OnReshape(width, height);
}

static void onDisplay(PuglView *view)
{
	PUi *pui = (PUi *)puglGetHandle(view);
	pui->OnDisplay();
}

static void onKeyboard(PuglView *view, bool press, uint32_t key)
{
	printf("keyboard %d %X\n", press, key);
}

static void onSpecial(PuglView *view, bool press, PuglKey key)
{
	printf("special %d %X\n", press, key);
}

static void onMotion(PuglView *view, int x, int y)
{
	PUi *pui = (PUi *)puglGetHandle(view);
	pui->OnMotion(x, y);
}

static void onMouse(PuglView *view, int button, bool press, int x, int y)
{
	PUi *pui = (PUi *)puglGetHandle(view);
	pui->OnMouse(button, press, x, y);
}

static void onScroll(PuglView *view, float dx, float dy)
{
	PUi *pui = (PUi *)puglGetHandle(view);
	pui->OnScroll(dx, dy);
}

void PUi::SetFunc()
{
	puglSetDisplayFunc(this->view, onDisplay);
	puglSetReshapeFunc(this->view, onReshape);
	puglSetKeyboardFunc(this->view, onKeyboard);
	puglSetSpecialFunc(this->view, onSpecial);
	puglSetMotionFunc(this->view, onMotion);
	puglSetMouseFunc(this->view, onMouse);
	puglSetScrollFunc(this->view, onScroll);
}