// ==========================================================================
// board.cpp: Implementation for hangman board
// A. Fischer, June 4, 2000                                  file: board.cpp
// Modified by M. Fischer, October 8, 2009
//===========================================================================
#include "board.hpp"
// ==========================================================================
Board::Board(const char* a, const char* puz) :
    errcnt(0), found(0), alpha(a, true), errors(a, false), puzzle(puz){
    //cerr << "\nConstructing Board.  ";
}

//--------------------------------------------------------- display the board
ostream&
Board::print( ostream& out ) const {
    out << "\n\nPuzzle is: " << puzzle << "\n\n";
    out << "    Letters left-->" << alpha << "\n";
    out << "    Bad guesses--->" << errors;

    for (int k = errcnt; k < HANG_MAX; k++) out << " _";
    return out << endl;
}

//----------------------------------------------------------- process a guess
Board::status
Board::guess(char c) {
    int where = alpha.find(c);
    if (where == -1) return NOT_IN_ALPHA;
    if ( !alpha.mask_slot(where) ) return USED_ALREADY;
    alpha.mask_slot(where) = false;

    int matches = puzzle.try_letter(c);
    if (matches <= 0) {
        errors.mask_slot(where) = true;
        errcnt++;
        return BAD_GUESS;
    }
    found += matches;
    return GOOD_GUESS;
}

//===========================================================================
//--------------------------------------------- user interaction for one move
void
Player::move() {
    char ch;
    cout << "Guess a letter: ";
    cin >> ch;
    cout << "You guessed '" << ch << "'";
    switch (guess( ch )) {
       case NOT_IN_ALPHA:
            cout << " -- but it's not in the alphabet." << endl;    break;
       case USED_ALREADY:
            cout << " -- but you guessed it once before." << endl;  break;
       case BAD_GUESS:
            cout << " -- too bad." << endl;                         break;
       case GOOD_GUESS:
            cout << ".  You scored!" << endl;                       break;
    }
    print(cout);
}

//-------------------------------------------------------------- play a board
int
Player::play() {
    print(cout);
    while (!gameOver()) move();
    if (gameWon()) {
        cout << "Congratulations -- you win!" << endl;
        return 1;
    }
    cout << "Sorry, you lose!" << "\nThe answer is: "
         << puzzleWord() << endl;
    return 0;
}