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#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <unistd.h>
#include <cstdlib>
#include <cassert>
#include <sys/time.h>
#include <cstring>

#include "params.h"
#include "world.h"
#include "parse.h"

#ifndef _WIN32
# include <signal.h>
#endif

using namespace std;


static ScreenBuffer *sb;

#ifndef _WIN32
static void signalHandler(int sig){
	if(sig==SIGINT){
		sb->emergencyDeinit();
		_exit(130);
	}
}
#endif


struct RobotSpec{
	string fname;
	bool random;
	int x,y,heading;
};

int parseInt(const char *str){
	char *endp;
	int v=strtol(str,&endp,10);
	if(str[0]=='\0'||*endp!='\0'){
		cerr<<"Invalid number '"<<str<<"'"<<endl;
		exit(1);
	}
	return v;
}

void usage(char **argv){
	cerr<<"Usage: "<<argv[0]<<" [-r <fname>]* [-p <fname> <x> <y> <heading>]* [-s <sleeptime>] [-t] [-B]"<<endl;
}

int main(int argc,char **argv){
	struct timeval tv;
	gettimeofday(&tv,nullptr);
	srand(tv.tv_sec*1000000+tv.tv_usec);

	World world;
	vector<Team> teams;

	vector<RobotSpec> robotSpecs;
	int sleeptime=3000;
	bool step = false;
	bool batch = false;

	if(argc<=1){
		usage(argv);
		return 1;
	}

	for(int i=1;i<argc;i++){
		if(argv[i][0]!='-'||strlen(argv[i])!=2){
			cerr<<"Unexpected argument '"<<argv[i]<<"'"<<endl;
			return 1;
		}
		switch(argv[i][1]){
			case 'h':
				usage(argv);
				return 0;

			case 'r':
				if(i>=argc-1){
					cerr<<"Expected file name after '-r'"<<endl;
					return 1;
				}
				robotSpecs.push_back({argv[i+1],true,0,0,0});
				i+=1;
				break;

			case 'p':
				if(i>=argc-4){
					cerr<<"Expected file name, x, y and heading after '-p'"<<endl;
					return 1;
				}
				robotSpecs.push_back({argv[i+1],false,parseInt(argv[i+2]),parseInt(argv[i+3]),parseInt(argv[i+4])});
				i+=4;
				break;

			case 's':
				if(i>=argc-1){
					cerr<<"Expected sleep time after '-s'"<<endl;
					return 1;
				}
				sleeptime=parseInt(argv[i+1]);
				i+=1;
				break;

			case 't':
				step = true;
				break;

			case 'B':
				batch = true;
				break;

			default:
				cerr<<"Unknown switch in '"<<argv[i]<<"'"<<endl;
				return 1;
		}
	}

	for(const RobotSpec &rs : robotSpecs){
		ifstream f(rs.fname);
		if(!f){
			cerr<<"Cannot open file '"<<rs.fname<<"'"<<endl;
			return 1;
		}
		teams.push_back(assemble(preprocess(f)));
		Team &t=teams.back();
		Robot &r=rs.random ? world.create(&t,2,t.banks.size(),false)
		                   : world.create(&t,2,t.banks.size(),false,rs.x,rs.y,rs.heading);
		for(int i=0;i<(int)t.banks.size();i++){
			r.load(i,t.banks[i]);
			r.active=1;
		}
	}

	if(batch){
		for(int i=0;i<C::autoTimeout;i++){
			world.tick();
			bool haveActive=false;
			for(int j=0;j<SIZE*SIZE;j++){
				const int x=j%SIZE,y=j/SIZE;
				if(world.board[y][x]&&world.board[y][x]->active){
					haveActive=true;
					break;
				}
			}
			if(!haveActive)break;
		}
		for(int y=0;y<SIZE;y++){
			for(int x=0;x<SIZE;x++){
				if(world.board[y][x]){
					cout<<world.board[y][x]->team<<' '
					    <<x<<' '<<y<<' '
					    <<world.board[y][x]->heading<<endl;
				}
			}
		}
	} else {
		sb=new ScreenBuffer(SIZE*3, SIZE+1);
#ifndef _WIN32
		signal(SIGINT,signalHandler);
#endif
		world.print(*sb);
		sb->draw();
		for(int i=0;i<C::autoTimeout;i++){
			if(step)cin.get();
			else usleep(sleeptime);
			world.tick();
			world.print(*sb);
			sb->mvprintf(0, SIZE, "step: %5i", i+2);
			sb->draw();
		}
	}
	delete sb;
}