#include "aliens.h"
#include <cmath>

Aliens::Aliens(Game_Data *gd, QObject *parent) :
		QObject(parent)
{
	gameData = gd;
	nextId = 1;
}


void Aliens::addAlien(int srcId)
{
	if (srcId < 0 || srcId >= gameData->srcAliens.size())
	{
		qCritical("ERROR out of aliens range");
		return;
	}
	AlienType al;// = gameData->srcAliens.at(srcId);
	al.id = nextId;
	al.src = srcId;
	al.finish = gameData->map->finishs().at(qrand()%gameData->map->finishs().size());
	al.pos = QPointF(gameData->map->starts().at(qrand()%gameData->map->starts().size()));
	al.path = gameData->map->createPath(al.pos.toPoint(),al.finish);
	al.pathIndex = 1;
	al.angle = 180.0f*(- std::atan2( al.pos.x() - al.path.at(al.pathIndex).x(),al.pos.y() - al.path.at(al.pathIndex).y()))/M_PI;
	al.animIndex = 0.f;
	if (al.path.isEmpty()) qFatal("ERROR create path");
	//qDebug() << al.path;
	al.health = gameData->srcAliens.at(srcId).health;
	al.speed = gameData->srcAliens.at(srcId).speed;
	al.imgType = gameData->srcAliens.at(srcId).imgType;
	//gameData->map->printMap();
	gameData->curAliens.insert(al.id,al);
	nextId++;
}


void Aliens::retrace(bool * OK)
{
	qDebug("re-trace!");
	gameData->map->removeAliensPath();
	for (QHash<int, AlienType>::iterator i = gameData->curAliens.begin(); i != gameData->curAliens.end(); ++i)
	{
		(*i).path = gameData->map->createPath((*i).pos.toPoint(),(*i).finish);
		(*i).pathIndex = 1;
		if ((*i).path.isEmpty()) *OK = false;
	}
}


void Aliens::delAlien(int Id)
{
	gameData->curAliens.remove(Id);
}


void Aliens::update()
{
	QList <int> missIndex;
	for (QHash<int, AlienType>::iterator i = gameData->curAliens.begin(); i != gameData->curAliens.end(); ++i)
	{
		//AlienType al = (*i);
		//qDebug() << i;
		//if (al.health < 0) emit AlienKill();
		float angl,arctg = 0;
		int curMiss = -1;
		while (distance2((*i).pos, (*i).path.at((*i).pathIndex)) < (*i).speed*(*i).speed)
		{
			(*i).pathIndex++;
			if ((*i).pathIndex >= (*i).path.size())
			{
				qDebug() << tr("Missing aliens = %1!").arg(gameData->missingAliens);
				missIndex.push_back((*i).id);
				curMiss = (*i).id;
				break;
			}
			/*{
				PathIndex = 0;
				position = game->start*game->cellsize;
			}*/
			//			tmpdx = (*i).pos.x() - (*i).path.at((*i).pathIndex).x();
			//			tmpdy = (*i).pos.y() - (*i).path.at((*i).pathIndex).y();
			//qDebug() << "next";
		}
		if (curMiss < 0)
		{
			arctg = std::atan2((*i).pos.x() - (*i).path.at((*i).pathIndex).x(),(*i).pos.y() - (*i).path.at((*i).pathIndex).y());
			//if (tmpdy < 0) arctg=arctg+M_PI;
			angl = 180.0f*(-arctg)/M_PI;
			/*if (PathIndex > 1)
		{
			if ((Position.angle-angl < -5 || Position.angle-angl > 5) && angl < 175 && angl > -175)
			{
				if (angl > Position.angle) Position.angle += 5;
				else Position.angle -= 5;
			}
			else Position.angle = angl;
		}
		else*/
			(*i).angle = angl;
			//qDebug() << "[" << PathIndex << ";" << PicIndex << "]" << "angle:" << Position.angle << "arctg:" << arctg << "Pos:" << Position.pnt;
			(*i).pos.setX((*i).pos.x()
						  -(*i).speed*std::sin(arctg));
			(*i).pos.setY((*i).pos.y()
						  -(*i).speed*std::cos(arctg));
			//return true;
			//gameData->curAliens.insert(al.id,al);
			//qDebug() <<"alien"<< i << "  path index=" << al.pathIndex << ", pos=" << al.pos;
		}
	}
	for (int j=0; j<missIndex.size(); j++)
	{
		gameData->missingAliens++;
		delAlien(missIndex.at(j));
	}
}