using namespace std;
#include <iostream>
#include <fstream>
#include <cstdlib>
#include "commands_queue.h"
#include "struct_stack.h"

void inizializza_coda (queue & q, char * filein);
void esegui_comando (command * cmd, stack & s);

int main (int argc, char * argv[])
{
  fstream myin;
  command * cmd;
  queue q; 
  stack s;

  if (argc!=2) {
    cout << "Usage: ./a.out <sourcefile>\n";
    exit(0);
  }

  init(q);
  init(s);
  inizializza_coda(q, argv[1]);

  cout << "Print queue: \n"; 
  print(q);

  while (dequeue(cmd, q)) {
    esegui_comando(cmd, s);
  }
}

void inizializza_coda (queue & q, char * filein)
{
  fstream myin;
  myin.open(filein,ios::in);
  
  char tmp;
  command * cmd;
  while (myin >> tmp) {
    cmd = new command;
    cmd->c = tmp;
    myin >> cmd->i;
    if (enqueue(cmd,q)==FAIL)
      cout << "Memoria esaurita!\n";
  }
  myin.close();
}

void esegui_comando (command * cmd, stack & s) 
{
  int val;
  switch (cmd->c) {
  case 'u':
    cout << "Push: " << cmd->i << endl; 
    if (push(cmd->i,s)==FAIL)
      cout << "Memoria esaurita!\n";
    break;
  case 'o':
    cout << "Pop " << endl; 
    if (pop(s)==FAIL)
      cout << "Stack vuoto!\n";
    break;
  case 't':
    cout << "Top: ";
    if (top(val,s)==FAIL)
      cout << "\nStack vuoto!\n";
    else cout << val << endl;
    break;
  case 'p':
    cout << "Print stack: \n"; 
    print(s);
    break;
  case 'f':
    break;
  default:
    cout << "Opzione errata\n";
  }
}