//  File:  pix.cpp
//  Author:  Dave Reed
//  Date:  9/20/04
//
//  Driver program for pixel-map manipulation.
///////////////////////////////////////////////////////////////////

#include <iostream>
#include <fstream>
#include <cctype>
#include <string>
#include "Pixmap.h"
using namespace std;

char GetCommand();

int main()
{
  Pixmap pic;
  char command = '?';

  while (command != 'q') {
    command = GetCommand();

    switch (command) {
      case 'r': { 
            string filename;
            cout << "Enter input file name: ";
            cin >> filename;
            ifstream istr(filename.c_str());

            pic.Read(istr);
          }
          break;
      case 'h': {
            pic.HorizReflect();
          }
          break;
      case 'v': {
            pic.VertReflect();
          }
          break;
      case 'i': {
            pic.Invert();
          }
          break;
      case 'w': {
            string filename;
            cout << "Enter output (pixel-map) file name: ";
            cin >> filename;
            ofstream ostr(filename.c_str());

            pic.Write(ostr);
          }
          break;
      case 'q': {
            cout << "Goodbye" << endl;
          }
          break;
      default : {
            cout << "Unknown command ignored." << endl;
          }
          break;
    }
    cout << endl;
  }

  return 0;
}

/////////////////////////////////////////////////////////////

char GetCommand()
// precondition : none
// postcondition: reads word and returns lower case first letter
{
    cout << "Enter command: " << endl
       << "  (R)ead a picture" << endl
       << "  (H)orizontal reflection (along x-axis)" << endl
       << "  (V)ertical reflection (along y-axis)" << endl
       << "  (I)nvert a picture" << endl
       << "  (W)rite a picture" << endl
       << "  (Q)uit" << endl << endl;

    string command;
    cin >> command;

    return tolower(command[0]);
}