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#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cassert>
#include <unistd.h>
#include <signal.h>
#include <sys/time.h>
#include <sys/stat.h>
#define S (5)
using namespace std;
bool should_flip_board=false;
struct Move;
class Board;
Move protocol_get_move(istream &s);
void protocol_put_move(ostream &s,Move m);
int index_deltas[8][2]={{0,-1},{1,-1},{1,0},{1,1},{0,1},{-1,1},{-1,0},{-1,-1}};
struct Move{
int neudir,from,dir;
string str(void){
stringstream ss;
ss<<neudir<<' '<<from<<' '<<dir;
return ss.str();
}
};
class Board{
public:
int grid[S*S];
int neuidx;
Board(void):neuidx(S*(S/2)+S/2){
memset(grid,0,S*S*sizeof(int));
grid[S*(S/2)+S/2]=3;
for(int i=0;i<S;i++){
grid[i]=1;
grid[S*(S-1)+i]=2;
}
}
int moved(int at,int dir){
int x=at%S,y=at/S,x2,y2;
while(true){
x2=x+index_deltas[dir][0];
y2=y+index_deltas[dir][1];
if(x2<0||x2>=S||y2<0||y2>=S||grid[S*y2+x2]!=0)return S*y+x;
x=x2;
y=y2;
}
}
bool move(int at,int dir){
int newat=moved(at,dir);
if(newat==at)return false;
grid[newat]=grid[at];
grid[at]=0;
if(grid[newat]==3)neuidx=newat;
return true;
}
void undomove(int at,int dir){
int movedidx=moved(at,dir);
movedidx+=S*index_deltas[dir][1]+index_deltas[dir][0];
grid[at]=grid[movedidx];
grid[movedidx]=0;
if(grid[at]==3)neuidx=at;
}
bool isvalid(Move mv){
int oldneuidx=neuidx;
//cerr<<"Called isvalid with move ";
//protocol_put_move(cerr,mv);
//print();
if(!move(oldneuidx,mv.neudir)){
//undomove(oldneuidx,mv.neudir);
return false;
}
if(!move(mv.from,mv.dir)){
//undomove(mv.from,mv.dir);
undomove(oldneuidx,mv.neudir);
return false;
}
undomove(mv.from,mv.dir);
undomove(oldneuidx,mv.neudir);
return true;
}
void print(void){
int x,y;
if(should_flip_board){
for(y=S-1;y>=0;y--){
for(x=S-1;x>=0;x--)cerr<<grid[S*y+x]<<' ';
cerr<<endl;
}
} else {
for(y=0;y<S;y++){
for(x=0;x<S;x++)cerr<<grid[S*y+x]<<' ';
cerr<<endl;
}
}
}
};
void restart_server(void);
void kill_server(void);
ofstream othermovefifo;
ifstream mynewmovefifo;
Move calculate_move(Board &bd){
cerr<<"c_m: restarting server..."<<endl;
restart_server();
cerr<<"c_m: Waiting for move from fifo..."<<endl;
Move mv=protocol_get_move(mynewmovefifo);
cerr<<"c_m: Got move from fifo."<<endl;
return mv;
}
long server_pid=-1;
int server_port=-1;
void setup_server(void){
unlink(".humanbot__.__othermove.fifo");
assert(mkfifo(".humanbot__.__othermove.fifo",0666)==0);
unlink(".humanbot__.__mynewmove.fifo");
assert(mkfifo(".humanbot__.__mynewmove.fifo",0666)==0);
server_port=42000+rand()%1000;
restart_server();
//only now can we do this, 'cause unix doesn't let a fifo exist with only one end
othermovefifo.open(".humanbot__.__othermove.fifo",ofstream::out|ofstream::app);
mynewmovefifo.open(".humanbot__.__mynewmove.fifo");
cerr<<"Opened fifo's!"<<endl;
}
void restart_server(void){
if(server_pid!=-1)kill_server();
pid_t cpid=fork();
assert(cpid!=-1);
if(cpid==0){ //child
cerr<<"Child!"<<endl;
server_pid=(long)getpid();
char *portstr;
asprintf(&portstr,"%d",server_port);
assert(!!portstr);
execl("/usr/bin/env","node","./humanbot_server.js",portstr,NULL);
perror("execlp");
exit(1);
}
cerr<<"Parent!"<<endl;
}
void kill_server(void){
kill(server_pid,SIGTERM); //stay friendly
usleep(100*1000); //100ms
kill(server_pid,SIGINT);
usleep(1000*1000); //1s
}
inline int flip_index(int idx){
return S*(S-1-idx/S)+S-1-idx%S;
}
inline int flip_dir(int dir){
return dir==-1?-1:(dir+4)%8;
}
Move protocol_get_move(istream &s){
Move m;
/*char c=s.peek();
if(c=='q'||c=='Q')exit(0);*/
cerr<<"Sleeping."<<endl;
system("sleep 10");
s>>m.neudir>>m.from>>m.dir;
if(should_flip_board){
m.neudir=flip_dir(m.neudir);
m.from=flip_index(m.from);
m.dir=flip_dir(m.dir);
}
cerr<<"Got: ";
protocol_put_move(cerr,m);
s.ignore(1024,'\n');
return m;
}
void protocol_put_move(ostream &s,Move m){
if(should_flip_board){
s<<flip_dir(m.neudir)<<' '<<flip_index(m.from)<<' '<<flip_dir(m.dir)<<endl;
} else {
s<<m.neudir<<' '<<m.from<<' '<<m.dir<<endl;
}
}
int main(void){
Board bd;
Move mv;
string line;
struct timeval tv;
gettimeofday(&tv,NULL);
cerr<<"seed="<<(1000000*tv.tv_sec+tv.tv_usec)<<endl;
srand(1000000*tv.tv_sec+tv.tv_usec);
//srand(1430130052185291);
setup_server();
getline(cin,line);
if(line=="go"){
othermovefifo<<"go"<<endl;
should_flip_board=false;
//mv.neudir=-1; mv.from=1; mv.dir=3;
mv=calculate_move(bd);
bd.move(mv.from,mv.dir);
protocol_put_move(cout,mv);
} else {
if(line!="nogo")cerr<<"no0b "<<line<<" not in (go,nogo)"<<endl;
othermovefifo<<"nogo"<<endl;
should_flip_board=true;
mv=protocol_get_move(cin);
protocol_put_move(othermovefifo,mv);
bd.move(mv.from,mv.dir);
bd.print();
mv=calculate_move(bd);
if(!bd.isvalid(mv)){
cerr<<"calculate_move gave invalid move "<<mv.str()<<endl;
return 1;
}
bd.move(bd.neuidx,mv.neudir);
bd.move(mv.from,mv.dir);
protocol_put_move(cout,mv);
}
while(true){
bd.print();
mv=protocol_get_move(cin);
protocol_put_move(othermovefifo,mv);
bd.move(bd.neuidx,mv.neudir);
bd.move(mv.from,mv.dir);
bd.print();
mv=calculate_move(bd);
if(!bd.isvalid(mv)){
cerr<<"calculate_move gave invalid move "<<mv.str()<<endl;
return 1;
}
bd.move(bd.neuidx,mv.neudir);
bd.move(mv.from,mv.dir);
protocol_put_move(cout,mv);
}
return 0;
}
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