// ==============================================================
//	This file is part of Glest (www.glest.org)
//
//	Copyright (C) 2001-2008 Martiño Figueroa
//
//	You can redistribute this code and/or modify it under
//	the terms of the GNU General Public License as published
//	by the Free Software Foundation; either version 2 of the
//	License, or (at your option) any later version
// ==============================================================

#include "minimap.h"

#include <cassert>

#include "world.h"
#include "vec.h"
#include "renderer.h"
#include "config.h"
#include "object.h"
#include "game_settings.h"
#include "leak_dumper.h"

using namespace Shared::Graphics;

namespace Glest{ namespace Game{

// =====================================================
// 	class Minimap
// =====================================================

const float Minimap::exploredAlpha= 0.5f;

Minimap::Minimap() {
	fowPixmap0= NULL;
	fowPixmap1= NULL;
	fowPixmap0Copy = NULL;
	fowPixmap1Copy = NULL;
	fogOfWar= true;
	gameSettings= NULL;
	tex=NULL;
	fowTex=NULL;
}

void Minimap::init(int w, int h, const World *world, bool fogOfWar) {
	if(SystemFlags::getSystemSettingType(SystemFlags::debugSystem).enabled) SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
	int scaledW= w/Map::cellScale;
	int scaledH= h/Map::cellScale;
	int potW = next2Power(scaledW);
	int potH = next2Power(scaledH);

	if(SystemFlags::getSystemSettingType(SystemFlags::debugSystem).enabled) SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] scaledW = %d, scaledH = %d, potW = %d, potH = %d\n",__FILE__,__FUNCTION__,__LINE__,scaledW,scaledH,potW,potH);

	this->fogOfWar = fogOfWar;
	this->gameSettings = world->getGameSettings();
	Renderer &renderer= Renderer::getInstance();

	if(SystemFlags::getSystemSettingType(SystemFlags::debugSystem).enabled) SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
	//fow pixmaps
	float f= 0.f;

	if(GlobalStaticFlags::getIsNonGraphicalModeEnabled() == false) {
		fowPixmap0 = new Pixmap2D(potW, potH, 1);
		fowPixmap0Copy = new Pixmap2D(potW, potH, 1);
		fowPixmap1 = new Pixmap2D(potW, potH, 1);
		fowPixmap1Copy = new Pixmap2D(potW, potH, 1);

		if(SystemFlags::getSystemSettingType(SystemFlags::debugSystem).enabled) SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);

		fowPixmap0->setPixels(&f);
		if((this->gameSettings->getFlagTypes1() & ft1_show_map_resources) == ft1_show_map_resources) {
			f = 0.f;
			fowPixmap1->setPixels(&f);
			f = 0.5f;
			for (int y=1; y < scaledH - 1; ++y) {
				for (int x=1; x < scaledW - 1; ++x) {
					fowPixmap1->setPixel(x, y, &f);
				}
			}
		}
		else {
			fowPixmap1->setPixels(&f);
		}
	}

	if(SystemFlags::getSystemSettingType(SystemFlags::debugSystem).enabled) SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);

	//fow tex
	fowTex= renderer.newTexture2D(rsGame);
	if(fowTex) {
		fowTex->setMipmap(false);
		fowTex->setPixmapInit(false);
		fowTex->setFormat(Texture::fAlpha);

		if(SystemFlags::getSystemSettingType(SystemFlags::debugSystem).enabled) SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] scaledW = %d, scaledH = %d, potW = %d, potH = %d\n",__FILE__,__FUNCTION__,__LINE__,scaledW,scaledH,potW,potH);

		fowTex->getPixmap()->init(potW, potH, 1);
		fowTex->getPixmap()->setPixels(&f);
	}

	if(SystemFlags::getSystemSettingType(SystemFlags::debugSystem).enabled) SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);

	//tex
	tex= renderer.newTexture2D(rsGame);
	if(tex) {
		tex->getPixmap()->init(scaledW, scaledH, 3);
		tex->setMipmap(false);
	}

	if(SystemFlags::getSystemSettingType(SystemFlags::debugSystem).enabled) SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);

	computeTexture(world);
}

Minimap::~Minimap() {
	Logger::getInstance().add(Lang::getInstance().get("LogScreenGameUnLoadingMiniMap","",true), true);
	delete fowPixmap0;
	fowPixmap0=NULL;
	delete fowPixmap0Copy;
	fowPixmap0Copy = NULL;
	delete fowPixmap1;
	fowPixmap1=NULL;
	delete fowPixmap1Copy;
	fowPixmap1Copy=NULL;
}

// ==================== set ====================

void Minimap::incFowTextureAlphaSurface(const Vec2i &sPos, float alpha,
		bool isIncrementalUpdate) {
	if(fowPixmap1) {
		assert(sPos.x<fowPixmap1->getW() && sPos.y<fowPixmap1->getH());

		if(fowPixmap1->getPixelf(sPos.x, sPos.y)<alpha){
			fowPixmap1->setPixel(sPos.x, sPos.y, alpha);
		}

		if(fowPixmap1Copy != NULL && isIncrementalUpdate == true) {
			if(fowPixmap1Copy->getPixelf(sPos.x, sPos.y)<alpha){
				fowPixmap1Copy->setPixel(sPos.x, sPos.y, alpha);
			}
		}
	}
}

void Minimap::setFogOfWar(bool value) {
	fogOfWar = value;
	resetFowTex();
}

void Minimap::copyFowTex() {
	fowPixmap0Copy->copy(fowPixmap0);
	fowPixmap1Copy->copy(fowPixmap1);
}
void Minimap::restoreFowTex() {
	fowPixmap0->copy(fowPixmap0Copy);
	fowPixmap1->copy(fowPixmap1Copy);
}

void Minimap::resetFowTex() {
	if(fowTex) {
		Pixmap2D *tmpPixmap= fowPixmap0;
		fowPixmap0= fowPixmap1;
		fowPixmap1= tmpPixmap;

		// Could turn off ONLY fog of war by setting below to false
		bool overridefogOfWarValue = fogOfWar;

		for(int i=0; i<fowTex->getPixmap()->getW(); ++i){
			for(int j=0; j<fowTex->getPixmap()->getH(); ++j){
				if ((fogOfWar == false && overridefogOfWarValue == false) &&
					(gameSettings->getFlagTypes1() & ft1_show_map_resources) != ft1_show_map_resources) {
					float p0 = fowPixmap0->getPixelf(i, j);
					float p1 = fowPixmap1->getPixelf(i, j);
					if (p0 > p1) {
						fowPixmap1->setPixel(i, j, p0);
					}
					else {
						fowPixmap1->setPixel(i, j, p1);
					}
				}
				else if((fogOfWar && overridefogOfWarValue) ||
					(gameSettings->getFlagTypes1() & ft1_show_map_resources) != ft1_show_map_resources) {
					float p0= fowPixmap0->getPixelf(i, j);
					float p1= fowPixmap1->getPixelf(i, j);

					if(p1>exploredAlpha){
						fowPixmap1->setPixel(i, j, exploredAlpha);
					}
					if(p0>p1){
						fowPixmap1->setPixel(i, j, p0);
					}
				}
				else{
					fowPixmap1->setPixel(i, j, 1.f);
				}
			}
		}
	}
}

void Minimap::updateFowTex(float t) {
	if(fowPixmap0 && fowTex) {
		for(int i=0; i<fowPixmap0->getW(); ++i){
			for(int j=0; j<fowPixmap0->getH(); ++j){
				float p1= fowPixmap1->getPixelf(i, j);
				if(p1!=fowTex->getPixmap()->getPixelf(i, j)){
					float p0= fowPixmap0->getPixelf(i, j);
					fowTex->getPixmap()->setPixel(i, j, p0+(t*(p1-p0)));
				}
			}
		}
	}
}

// ==================== PRIVATE ====================

void Minimap::computeTexture(const World *world) {

	Vec3f color;
	const Map *map= world->getMap();

	if(tex) {
		tex->getPixmap()->setPixels(Vec4f(1.f, 1.f, 1.f, 0.1f).ptr());

		for(int j=0; j<tex->getPixmap()->getH(); ++j){
			for(int i=0; i<tex->getPixmap()->getW(); ++i){
				SurfaceCell *sc= map->getSurfaceCell(i, j);

				if(sc->getObject()==NULL || sc->getObject()->getType()==NULL){
					const Pixmap2D *p= world->getTileset()->getSurfPixmap(sc->getSurfaceType(), 0);
					color= p->getPixel3f(p->getW()/2, p->getH()/2);
					color= color * static_cast<float>(sc->getVertex().y/6.f);

					if(sc->getVertex().y<= world->getMap()->getWaterLevel()){
						color+= Vec3f(0.5f, 0.5f, 1.0f);
					}

					if(color.x>1.f) color.x=1.f;
					if(color.y>1.f) color.y=1.f;
					if(color.z>1.f) color.z=1.f;
				}
				else{
					color= sc->getObject()->getType()->getColor();
				}
				tex->getPixmap()->setPixel(i, j, color);
			}
		}
	}
}

void Minimap::saveGame(XmlNode *rootNode) {
	std::map<string,string> mapTagReplacements;
	XmlNode *minimapNode = rootNode->addChild("Minimap");

	if(fowPixmap1 != NULL) {
		for(unsigned int i = 0; i < fowPixmap1->getPixelByteCount(); ++i) {
			if(fowPixmap1->getPixels()[i] != 0) {
				XmlNode *fowPixmap1Node = minimapNode->addChild("fowPixmap1");
				fowPixmap1Node->addAttribute("index",intToStr(i), mapTagReplacements);
				fowPixmap1Node->addAttribute("pixel",intToStr(fowPixmap1->getPixels()[i]), mapTagReplacements);
			}
		}
	}
}

void Minimap::loadGame(const XmlNode *rootNode) {
	const XmlNode *minimapNode = rootNode->getChild("Minimap");

	if(minimapNode->hasChild("fowPixmap1") == true) {
		vector<XmlNode *> fowPixmap1NodeList = minimapNode->getChildList("fowPixmap1");
		for(unsigned int i = 0; i < fowPixmap1NodeList.size(); ++i) {
			XmlNode *fowPixmap1Node = fowPixmap1NodeList[i];

			int pixelIndex = fowPixmap1Node->getAttribute("index")->getIntValue();
			fowPixmap1->getPixels()[pixelIndex] = fowPixmap1Node->getAttribute("pixel")->getIntValue();
		}
	}
}

}}//end namespace