#include <unistd.h>
#include "syntax.h"


void exec_cmd(ExecutableCommand cmd, int* pgid) {
    
    pid_t pid = fork();

    if (pid == 0) {
        
        if (*pgid == -1) {
            setpgid(0, 0);
        } else {
            setpgid(0, *pgid);
        }

        dup2(cmd.stdin_fd, STDIN_FILENO);
        dup2(cmd.stdout_fd, STDOUT_FILENO);

        for (int i = 0; i < cmd.open_fds.count; i++) {
            FdRedirect fd_rd = *get_from_FdRedirectVec(&cmd.redirects, i);
            dup2(fd_rd.to, fd_rd.redirected);
        }

        signal(SIGINT,  SIG_DFL);
        signal(SIGQUIT, SIG_DFL);
        signal(SIGTSTP, SIG_DFL);
        signal(SIGTTIN, SIG_DFL);
        signal(SIGTTOU, SIG_DFL);

        execvp(cmd.args[0], cmd.args);
        exit(67);
    }

    if (*pgid == -1) {
        setpgid(pid, pid);
        *pgid = pid;
    } else {
        setpgid(pid, *pgid);
    }
}


ExecutableCommand process_pl_command(PlCommand pl_cmd) {
    StrVec arg_vec = make_StrVec(256);
    for (int i = 0; i < pl_cmd.args.count; i++) {
        Arg arg = *get_from_ArgVec(&pl_cmd.args, i);
        switch (arg.kind) {
            case ARG_LIT:
                push_to_StrVec(&arg_vec, arg.as.lit_str);
                break;
            default:
                exit(67);
        }
    }

    FdRedirectVec fd_redirs = make_FdRedirectVec(256);
    for (int j = 0; j < pl_cmd.redirects.count, j++) {
        Redirect redir = *get_from_RedirectVec(&pl_cmd.redirects, j);
        FdRedirect fd_redir;
        int fd;
        switch (redir.kind) {
            case REDIR_FILE_IN:  
                fd = 
        }
    }
}


void execute_command_pipeline(PlCommand* pipeline) {
    int trunk_fd = STDIN_FILENO;
    int pgid = -1;

    size_t i = 0;
    Connector last_conn;
    do {
        PlCommand cmd = pipeline[i];
        
    } while (last_conn != CONN_EOL);
}