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

 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 <cstdlib>		// getenv
#include <iostream>
#include <string>

#include <Moof/Exception.hh>
#include <Moof/Log.hh>
#include <Moof/Math.hh>
#include <Moof/OpenGL.hh>
#include <Moof/Settings.hh>
#include <Moof/Thread.hh>
#include <Moof/Timer.hh>
#include <Moof/Video.hh>

#include "YoinkApp.hh"

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


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

	char* configFile = getenv("YOINKRC");
	char* dataDir = getenv("YOINK_DATADIR");

	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 += ":";
	}

	// add the colon-delimited paths from configure
	files += YOINK_CONFIGFILES;

	if (dataDir)
	{
		// if another data directory is set in the environment, look for a
		// config file there
		files += ":";
		files += dataDir;
		files += "/yoinkrc";
	}

	// look in the configured data directory last of all
	files += ":";
	files += (dataDir ? dataDir : YOINK_DATADIR);
	files += "/yoinkrc";

	return files;
}

static std::string iconFile()
{
	char* dataDir = getenv("YOINK_DATADIR");

	// first set up the search paths so we can find the icon and other resources
	if (dataDir)
	{
		// look first in the data directory specified by the environment
		Mf::Resource::addSearchPath(dataDir);
	}

	// then look in the configured data directory
	Mf::Resource::addSearchPath(YOINK_DATADIR);

	return Mf::Resource::getPath("yoink.png");
}


void YoinkApp::myFunc(Mf::Timer& timer, Mf::Scalar t)
{
	std::cout << "timer: " << t << std::endl;
	
	//timer.invalidate();
}

int YoinkApp::myThread()
{
	Mf::Scalar timer = Mf::Timer::getTicks();

	for (;;)
	{
		std::cout << "thread awake: " << Mf::Timer::getTicks() << std::endl;

		timer += 3.0;
		Mf::Timer::sleep(timer, true);
	}
	return 0;
}


YoinkApp::YoinkApp(int argc, char* argv[]) :
	Mf::Engine(argc, argv, configFiles(), PACKAGE_STRING, iconFile()),
	music("NightFusionIntro"),
	punchSound("RobotPunch")
{
	Mf::dispatcher::addHandler("video.context_recreated",
			boost::bind(&YoinkApp::contextRecreated, this, _1), this);
	setupGL();

	music.setLooping(true);
	music.enqueue("NightFusionLoop");
	music.stream();

	heroine = Character::alloc("RobotTrooper");
	heroine->getAnimation().startSequence("Run");

	Mf::Scalar a[6] = {0.0, 1.5, -0.5, 3.0, -1.5, 1.0};
	interp.init(a, 2.0, Mf::Interpolator::OSCILLATE);

	Mf::Scalar b[2] = {1.0, 0.0};
	fadeIn.init(b, 1.0);

	octree = Mf::loadScene("Test");
	heroine->treeNode = octree->insert(heroine);

	//myTimer.init(boost::bind(&YoinkApp::myFunc, this, _1, _2),
			//0.0, Mf::Timer::REPEAT);
	//Mf::Thread thread = Mf::detachFunction(boost::bind(&YoinkApp::myThread, this));
	//std::cout << "thread " << thread << " detached." << std::endl;
}

YoinkApp::~YoinkApp()
{
	Mf::dispatcher::removeHandler(this);
}


void YoinkApp::setupGL()
{
	glEnable(GL_TEXTURE_2D);

	//glEnable(GL_CULL_FACE);
	glEnable(GL_DEPTH_TEST);

	glShadeModel(GL_SMOOTH);
	//glEnable(GL_POLYGON_SMOOTH);

	//int texSize;
	//glGetIntegerv(GL_MAX_TEXTURE_SIZE, &texSize);
	//std::cout << "texture size: " << texSize << std::endl;
	
	//glEnable(GL_BLEND);
	//glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	glEnable(GL_ALPHA_TEST);
	glAlphaFunc(GL_GREATER, 0.0);

	glClearColor(1.0, 0.0, 0.0, 1.0);

	//glMatrixMode(GL_PROJECTION);
	//glLoadIdentity();
	//gluPerspective(60.0, 1.33333, 1.0, 2500.0);
	camera.setProjection(cml::rad(60.0), 1.33333, 32.0, 2500.0);
	camera.uploadProjectionToGL();

	//glMatrixMode(GL_MODELVIEW);
	
	//glLineWidth(10.0f);
}

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


void YoinkApp::update(Mf::Scalar t, Mf::Scalar dt)
{
	//dt *= 0.7;

	fadeIn.update(dt);
	camera.update(t, dt);
	heroine->update(t, dt);

	// reinsert heroine
	heroine->treeNode = octree->reinsert(heroine, heroine->treeNode);
	octree->print(heroine->treeNode);
	
	//camera.lookAt(heroine->getSphere().point);
	camera.setPosition(Mf::Vector3(-heroine->current.position[0],
				-heroine->current.position[1], -256));

	interp.update(dt);
	hud.setBar1Progress(interp.getState(dt));
	hud.setBar2Progress(1.0 - interp.getState(dt));
}


void YoinkApp::draw(Mf::Scalar alpha)
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	glMatrixMode(GL_MODELVIEW);
	glLoadMatrix(camera.getModelviewMatrix().data());

	// DRAW THE SCENE
	Mf::Texture::resetBind();

	glEnableClientState(GL_VERTEX_ARRAY);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);

	octree->drawIfVisible(alpha, camera.getFrustum());

	//heroine->draw(alpha);
	heroine->getAabb().draw();

	hud.draw();

	// DRAW FADE
	glEnable(GL_BLEND);
	glMatrixMode(GL_PROJECTION);
	glPushMatrix();
	glLoadIdentity();
	glMatrixMode(GL_MODELVIEW);
	glPushMatrix();
	glLoadIdentity();
	glColor4f(0.0f, 0.0f, 0.0f, fadeIn.getState(alpha));
	Mf::Texture::resetBind();

	//glRectf(-1.0f, -1.0f, 1.0f, 1.0f);
	glBegin(GL_QUADS);
		glVertex3f(-1.0, -1.0, -0.1);
		glVertex3f(1.0, -1.0, -0.1);
		glVertex3f(1.0, 1.0, -0.1);
		glVertex3f(-1.0, 1.0, -0.1);
	glEnd();

	glDisable(GL_BLEND);

	glMatrixMode(GL_PROJECTION);
	glPopMatrix();
	glMatrixMode(GL_MODELVIEW);
	glPopMatrix();
}

void YoinkApp::handleEvent(const Mf::Event& event)
{
	switch (event.type)
	{
		case SDL_KEYDOWN:
			if (event.key.keysym.sym == SDLK_ESCAPE)
			{
				stop();
				break;
			}
			else if (event.key.keysym.sym == SDLK_f)
			{
				getVideo().toggleFull();
				break;
			}
			else if (event.key.keysym.sym == SDLK_SPACE)
			{
				heroine->getAnimation().startSequence("Punch");
				punchSound.play();
				break;
			}
			else if (event.key.keysym.sym == SDLK_t)
			{
				Mf::dispatcher::dispatch("video.context_recreated");
				break;
			}
			else if (event.key.keysym.sym == SDLK_p)
			{
				music.toggle();
				break;
			}
			else if (event.key.keysym.sym == SDLK_l)
			{
				getVideo().toggleCursorGrab();
				getVideo().toggleCursorVisible();
				break;
			}

		case SDL_KEYUP:
			heroine->handleEvent(event);

		case SDL_MOUSEMOTION:
		case SDL_MOUSEBUTTONDOWN:
			camera.handleEvent(event);
			break;

		case SDL_QUIT:
			stop();
			break;

		case SDL_VIDEORESIZE:
			glViewport(0, 0, event.resize.w, event.resize.h);
			hud.resize(event.resize.w, event.resize.h);
			camera.setProjection(cml::rad(60.0),
				double(event.resize.w) / double(event.resize.h), 32.0, 2500.0);
			camera.uploadProjectionToGL();
			break;
	}
}



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

#if		YOINK_LOGLEVEL >= 4
	Mf::setLogLevel(Mf::LOG_DEBUG);
#elif	YOINK_LOGLEVEL >= 3
	Mf::setLogLevel(Mf::LOG_INFO);
#elif	YOINK_LOGLEVEL >= 2
	Mf::setLogLevel(Mf::LOG_WARNING);
#elif	YOINK_LOGLEVEL >= 1
	Mf::setLogLevel(Mf::LOG_ERROR);
#elif	YOINK_LOGLEVEL
	Mf::setLogLevel(Mf::LOG_NONE);
#endif

	int status = 0;

	try
	{
		YoinkApp app(argc, argv);
		status = app.run();
	}
	catch (Mf::Exception e)
	{
		Mf::logError("unhandled exception: <<%s>>", e.what());
		Mf::logInfo("it's time to crash now :-(");
		//status = 1;
		throw e;
	}

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


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