/*******************************************************************************

 Copyright (c) 2009, Charles McGarvey
 All rights reserved.
 
 Redistribution   and   use  in  source  and  binary  forms,  with  or  without
 modification, are permitted provided that the following conditions are met:
 
   * Redistributions  of  source  code  must retain the above copyright notice,
     this list of conditions and the following disclaimer.
   * Redistributions  in binary form must reproduce the above copyright notice,
     this  list of conditions and the following disclaimer in the documentation
     and/or other materials provided with the distribution.
 
 THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 AND  ANY  EXPRESS  OR  IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 DISCLAIMED.  IN  NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 FOR  ANY  DIRECT,  INDIRECT,  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES  (INCLUDING,  BUT  NOT  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES;  LOSS  OF  USE,  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*******************************************************************************/

#include <iostream>
#include <string>

#include <cstdlib>		// getenv

#include <boost/bind.hpp>

#include "math.hh"
#include "opengl.hh"
#include "settings.hh"
#include "timer.hh"
#include "video.hh"

#include "YoinkApp.hh"

#if HAVE_CONFIG_H
#include "config.h"
#endif


static std::string configFiles()
{
	std::string files;

	char* configFile = getenv("YOINKRC");

	if (configFile)
	{
		// if a config file from the environment variable is specified, we want
		// to load it first so it has precedence
		files += configFile;
		files += ":";
	}

	files += YOINK_CONFIGFILES;

	return files;
}


YoinkApp::YoinkApp(int argc, char* argv[]) :
	dc::engine(PACKAGE_STRING, argc, argv, configFiles())
{
	std::cout << PACKAGE_STRING << std::endl
			  << "Compiled " << __TIME__ " " __DATE__ << std::endl
			  << "Send requests, patches, and bug reports to <"
			  PACKAGE_BUGREPORT << ">." << std::endl << std::endl;

	char* dataDir = getenv("YOINK_DATADIR");

	if (dataDir)
	{
		dc::resource::addSearchPath(dataDir);
	}

	dc::resource::addSearchPath(YOINK_DATADIR);

	dc::dispatcher::instance().addHandler("video.context_recreated",
			boost::bind(&YoinkApp::contextRecreated, this, _1), this);
	setupGL();

	state = 0.0;

	someChar = new Character("RobotTrooper");
	someChar->getAnimation().startSequence("Run");

	font = new TilemapFont;

	dc::vector2 coeffs[4];
	coeffs[0] = dc::vector2(0.0, 0.0);
	coeffs[1] = dc::vector2(0.5, 0.0);
	coeffs[2] = dc::vector2(0.5, 0.0);
	coeffs[3] = dc::vector2(1.0, 0.0);
	interp.init(coeffs, 1.0, dc::interpolator::oscillate);

	dc::scalar coeff[2] = {1.0, 0.0};
	fadeIn.init(coeff, 0.5f);

	testScene = new dc::scene("Test");
}

YoinkApp::~YoinkApp()
{
	delete someChar;
	delete font;

	dc::dispatcher::instance().removeHandler(this);

	std::cout << "Goodbye..." << std::endl;
}


void YoinkApp::setupGL()
{
	glEnable(GL_TEXTURE_2D);
	//glEnable(GL_CULL_FACE);
	glEnable(GL_DEPTH_TEST);

	glShadeModel(GL_SMOOTH);
	
	//glEnable(GL_BLEND);
	//glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	glEnable(GL_ALPHA_TEST);
	glAlphaFunc(GL_GREATER, 0.0);

	glClearColor(0.0, 0.0, 1.0, 1.0);

	//glLineWidth(10.0f);
}

void YoinkApp::contextRecreated(const dc::notification& note)
{
	// Whenever the context and a new one created, it probably won't contain our
	// state so we need to set that up again.
	setupGL();
}


void YoinkApp::update(dc::scalar t, dc::scalar dt)
{
	//dt *= 0.2;
	
	fadeIn.update(dt);

	someChar->getAnimation().update(t, dt);
	interp.update(dt);

	prevstate = state;
	state += dt;
}


void YoinkApp::draw(dc::scalar alpha)
{
	//dc::vector4 meh;
	//meh.random(0.0, 1.0);
	//static dc::vector4 c1(meh);

	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	//dc::scalar drawstate = cml::lerp(prevstate, state, alpha);
	//dc::scalar sinstate = std::sin(drawstate);
	//dc::scalar cosstate = std::cos(drawstate);
	

	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(60.0, 1.33333, 1.0, 2000.0);
	
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();

	glBindTexture(GL_TEXTURE_2D, 0);
	//glRotatef(drawstate*15.0f, 0.0, 1.0, 0.0);
	glTranslatef(x, y, z);

	// DRAW THE SCENE
	testScene->draw(alpha);


	/*
	someChar->getTilemap().bind();
	glColor3f(1.0, 1.0, 1.0);

	unsigned heroFrame = someChar->getAnimation().getFrame();

	float coords[8];
	someChar->getTilemap().getTileCoords(heroFrame, coords);

	glBegin(GL_QUADS);
		glTexCoord2f(coords[0], coords[1]);
		glVertex3f(-1.0, 0.0, 0.0);
		glTexCoord2f(coords[2], coords[3]);
		glVertex3f(0.0, 0.0, 0.0);
		glTexCoord2f(coords[4], coords[5]);
		glVertex3f(0.0, 1.0, 0.0);
		glTexCoord2f(coords[6], coords[7]);
		glVertex3f(-1.0, 1.0, 0.0);
	glEnd();


	someChar->getTilemap().getTileCoords(heroFrame, coords,
			dc::tilemap::reverse);

	glBegin(GL_QUADS);
		glTexCoord2f(coords[0], coords[1]);
		glVertex3f(0.0, 0.0, 0.0);
		glTexCoord2f(coords[2], coords[3]);
		glVertex3f(1.0, 0.0, 0.0);
		glTexCoord2f(coords[4], coords[5]);
		glVertex3f(1.0, 1.0, 0.0);
		glTexCoord2f(coords[6], coords[7]);
		glVertex3f(0.0, 1.0, 0.0);
	glEnd();

	glColor4f(1.0,0.0,0.0,0.5);

	glBindTexture(GL_TEXTURE_2D, 0);
	glColor4fv(c1.data());

	glRectd(-cosstate, -sinstate, sinstate, cosstate);
	glRectf(0.0f, 0.0f, sinstate, cosstate);

	font->bind();
	
	font->getTileCoords('c', coords);

	glBegin(GL_QUADS);
		glTexCoord2f(coords[0], coords[1]);
		glVertex3f(-1.0, 0.0, 0.0);
		glTexCoord2f(coords[2], coords[3]);
		glVertex3f(0.0, 0.0, 0.0);
		glTexCoord2f(coords[4], coords[5]);
		glVertex3f(0.0, 1.0, 0.0);
		glTexCoord2f(coords[6], coords[7]);
		glVertex3f(-1.0, 1.0, 0.0);
	glEnd();

	font->getTileCoords('h', coords);

	glBegin(GL_QUADS);
		glTexCoord2f(coords[0], coords[1]);
		glVertex3f(0.0, 0.0, 0.0);
		glTexCoord2f(coords[2], coords[3]);
		glVertex3f(1.0, 0.0, 0.0);
		glTexCoord2f(coords[4], coords[5]);
		glVertex3f(1.0, 1.0, 0.0);
		glTexCoord2f(coords[6], coords[7]);
		glVertex3f(0.0, 1.0, 0.0);
	glEnd();

	font->getTileCoords('a', coords);

	glBegin(GL_QUADS);
		glTexCoord2f(coords[0], coords[1]);
		glVertex3f(-1.0, -1.0, 0.0);
		glTexCoord2f(coords[2], coords[3]);
		glVertex3f(0.0, -1.0, 0.0);
		glTexCoord2f(coords[4], coords[5]);
		glVertex3f(0.0, 0.0, 0.0);
		glTexCoord2f(coords[6], coords[7]);
		glVertex3f(-1.0, 0.0, 0.0);
	glEnd();

	font->getTileCoords('z', coords);

	glBegin(GL_QUADS);
		glTexCoord2f(coords[0], coords[1]);
		glVertex3f(0.0, -1.0, 0.0);
		glTexCoord2f(coords[2], coords[3]);
		glVertex3f(1.0, -1.0, 0.0);
		glTexCoord2f(coords[4], coords[5]);
		glVertex3f(1.0, 0.0, 0.0);
		glTexCoord2f(coords[6], coords[7]);
		glVertex3f(0.0, 0.0, 0.0);
	glEnd();

	glEnable(GL_BLEND);
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	glDisable(GL_DEPTH_TEST);
	
	glBindTexture(GL_TEXTURE_2D, 0);
	glColor4f(0.0f, 0.0f, 0.0f, 1.0f);

	glBegin(GL_LINES);
		glVertex2f(0.0f, 0.0f);
		glVertex2fv(interp.getState(alpha).data());
	glEnd();

	glColor4f(0.0f, 0.0f, 0.0f, fadeIn.getState(alpha));
	glRectf(-1.0f, -1.0f, 1.0f, 1.0f);

	glDisable(GL_BLEND);
	glEnable(GL_DEPTH_TEST);*/
}

void YoinkApp::handleEvent(const dc::event& e)
{
	switch (e.type)
	{
		case SDL_KEYDOWN:
			if (e.key.keysym.sym == SDLK_ESCAPE)
			{
				stop();
			}
			else if (e.key.keysym.sym == SDLK_f)
			{
				getVideo().toggleFull();
			}
			else if (e.key.keysym.sym == SDLK_a)
			{
				someChar->getAnimation().startSequence("Punch");
			}
			else if (e.key.keysym.sym == SDLK_RIGHT)
			{
				x -= 50.0;
			}
			else if (e.key.keysym.sym == SDLK_LEFT)
			{
				x += 50.0;
			}
			else if (e.key.keysym.sym == SDLK_UP)
			{
				y -= 50.0;
			}
			else if (e.key.keysym.sym == SDLK_DOWN)
			{
				y += 50.0;
			}
			else if (e.key.keysym.sym == SDLK_PAGEUP)
			{
				z += 50.0;
			}
			else if (e.key.keysym.sym == SDLK_PAGEDOWN)
			{
				z -= 50.0;
			}
			break;

		case SDL_QUIT:
			stop();
			break;

		case SDL_VIDEORESIZE:
			glViewport(0, 0, e.resize.w, e.resize.h);
			break;
	}
}



int main(int argc, char* argv[])
{
	YoinkApp app(argc, argv);
	return app.run();
}

/** vim: set ts=4 sw=4 tw=80: *************************************************/