#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include <string.h>
#include "Integrated.h"
#include "Pish.h"

// Main function for Pish program
void Pish(void)
{
    CommandStruct commandObject = {"", 0};
    CommandStruct* command = &commandObject;
    char* inputStr;
    int forkPID;
    while (1)
    {
        inputStr = GetInput();
        ParseInput(inputStr, command);
	    IntegratedCheck(command->argv[0]);
        printf("Successfully passed input phase\n");
        forkPID = fork();
        // Child
        if (forkPID == 0)
        {
            // This is the child process
            // Setup the child's process environment here
            // E.g., where is standard I/O, how to handle signals?
            // TODO: Adjust Execute() to handle CommandStruct
            printf("Executing in fork...\n");
            Execute(command->argv[0]);
            // exec does not return if it succeeds
            printf("ERROR: Could not execute %s\n", command->argv[0]);
            exit(1);
        }
        // Parent
        else
        {
            // This is the parent process; Wait for the child to finish
            // Removed due to potentially useless
            // int pid = forkPID;
            // wait(&pid);
            printf("Waiting for fork...\n");
            wait(&forkPID);
        }
        // TODO: Remove break when while loop doesn't break program
        break;
    }
}

// Executes a command to the system
void Execute(char* command)
{
    system(command);
}

// Prints a prompt and then reads a command from the terminal
char* GetInput(void)
{
    char prompt = '$';
    char *commandLine;

    printf("%c ", prompt);
    scanf("%[^\n]", commandLine);

    return commandLine;
}

void ParseInput(char* inputString, CommandStruct* command)
{
    //Parse command
    int* count = &(command->argc);
	char* token = strtok(inputString, " ");
    command->argv[*count] = token;
    *count++;
	while (token != NULL)
    {
	    //This only holds 1 command at a time then it overrides
	    //Will need modified
	    token = strtok(NULL, " ");
        command->argv[*count] = token;
        command->argc++;
	}
}