#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/param.h>
#include <errno.h>

#include "main.h"
#include "helper_functions.c"
#include "lsh_main_func.c"
#include "lsh_split_line.c"
#include "lsh_builtins.c"

void lsh_loop(SHELL_OB *shell_obj){
    char *line;
    char **args;
    CMD **cmds;
    int status;

    do {
        //get pwd
        char *cwd= getenv("PWD");
        char *pwd=basename(cwd);
        if(pwd==NULL){
            fprintf(stderr,"lsh:pwd is null\n\n");
            exit(EXIT_FAILURE);
        }

        snprintf(shell_obj->prompt,sizeof(char) * 1024,"%s %s> ",shell_obj->pre_prompt,pwd);
        free(pwd);
        printf("%s",shell_obj->prompt);
        line = lsh_read_line();
        cmds = lsh_split_command(line);
        int j=0;
        while (cmds[j]){
            args = lsh_split_line(cmds[j]->cmd);
            status = lsh_execute(args,cmds[j]);
            j++;

            int i=0;
            while (args[i])
                free(args[i++]);
            free(args);
        }

        int i=0;
        while(cmds[i]){
            if(cmds[i]->out_dir!=NULL) free(cmds[i]->out_dir);
            free(cmds[i]);
            i++;
        }
        free(cmds);
        free(line);
    } while (status);
}

static char* call_realpath (char * argv0) {
    char* resolved_path=(char*)malloce(sizeof(char)*PATH_MAX);

    if (realpath (argv0, resolved_path) == 0) { 
        fprintf (stderr, "lsh: realpath failed: %s\n", strerror (errno));
        exit(errno);
    } else {
        return resolved_path;
    }
}

int main(int argc, char **argv){
    //set sh level
    char *shlvl = getenv("SHLVL");
    if(shlvl != NULL){
        int shlvli = atoi(shlvl);
        shlvli++;
        sprintf(shlvl,"%d",shlvli);
        setenv("SHLVL",shlvl,1);
    }

    //remove this if you dont care about SHELL var being set
    char* prog_path = call_realpath("/proc/self/exe");
    setenv("SHELL",prog_path,1);

    //Set The prompt
    SHELL_OB shell_obj;
    shell_obj.prompt = (char *)malloce(sizeof(char) * 1024);
    shell_obj.pre_prompt = (char *)malloce(sizeof(char) * 1024);

    //get the hostname
    char *hostname = (char *)malloce(sizeof(char) * 1024);
    gethostname(hostname,sizeof(char) * 1024);

    //set the pre_prompt
    snprintf(shell_obj.pre_prompt,sizeof(char) * 1024,"%s@%s",getenv("USER"),hostname);
    free(hostname);

    lsh_loop(&shell_obj);

    free(shell_obj.prompt);
    free(shell_obj.pre_prompt);
    free(prog_path);
    return EXIT_SUCCESS;
}