// Oldham, Jeffrey D.
// 2000Mar13
// CS1321

// Modified by:
// Massingill, Berna L.
// 2000 March

// Brain-Dead String Editor

// Based on Eric Roberts's \emph{Programming Abstractions in C}, chapter~9.

#include <iostream.h>
#include <cstdlib>		// has EXIT_SUCCESS
#include <string>
#include <cctype>		// has tolower()
#include "buffer-2.h"
using namespace std;

int main()
{
  buffer b;
  string command;
  char prompt[] = "command? (? for help)> ";
  char help[] = 
    "<enter> to display line\n"
    "b to move cursor left\n"
    "f to move cursor right\n"
    "d to delete character\n"
    "iXYZQ to insert XYZQ\n"
    "q to quit\n";

  cout << prompt;
  while (getline(cin, command)) {
    if (command.size() > 0) {
      char c = tolower(command[0]);
      if (c == '?') cout << help;
      else if (c == 'b') b.backCursor();
      else if (c == 'f') b.forwardCursor();
      else if (c == 'd') b.deleteChar();
      else if (c == 'i') b.insertChars(command.substr(1));
                                // extract all but the first character
      else if (c == 'q') break;	// exit loop
      else
        cerr << "Illegal command\n";
    }
    cout << b << endl;
    printCursor(cout, b) << endl;
    cout << prompt;
  }

  return EXIT_SUCCESS;
}