/*

Program 1
   Programmer: Dan Bennett
   Date : Jan 2013

   Play a game of hangman.

   This program will play a game of hangman, the computer will select words
   from an input file and allow the user to guess letters in the word.  The
   user gets 5 incorrect letters before they lose that round of the game.

   This program uses a trick of constructing a "guessed" word, which is 
   all blanks in the beginning, but gets filled in as the game goes by.  Thus
   _ can not be part of any word selected.

   It works somewhat like "wheel of fortune" in that it allows for phrases 
   not just words.
*/

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

// note, I only used function prototypes for high level functions.  
// The others are declared before they are used.
//
// Your choice on this.  We will find a  way to do this better (or different)
// later in the semester.

void FixAWord(string & );
string GetAWord(ifstream & wordFile);

// input file name
const string WORD_FILE_NAME = "phrases.txt" ;

// constants associated with drawing the suspect on the gallows.
const char LEFT_ARM = '\\';
const char HEAD = '0';
const char RIGHT_ARM = '/';
const char BODY = '|';
const char LEFT_LEG = '/';
const char RIGHT_LEG = '\\';

const int LEFT_ARM_COUNT = 1;
const int HEAD_COUNT = 2;
const int RIGHT_ARM_COUNT = 3;
const int BODY_COUNT = 4;
const int LEFT_LEG_COUNT = 5;
const int RIGHT_LEG_COUNT = 6;

int main() {
    ifstream wordFile;// input file
    bool done = false;// true if finsihed playing all gams
    int wins = 0,     // number of games won
        games = 0;    // number of games played
    string word;      // the word the user will guess
    char  answer;     // the answer to the "do you want to play again question"
    int i;            // lcv for various routines
    int turn;         // turn in a current round
    char letter;      // the letter the player guessed
    string badLetters,// bad guesses
           solvedWord;// good guesses!

    wordFile.open(WORD_FILE_NAME.c_str());

    cout << "Hello, welcome to hangman" << endl;
    cout << endl;

    while(not done) {
	games ++;
        // read the word
        /*
         Get the next word from the file.  

         Remember the assumption that the file will have at 
	         least one word in it.
         The routine will start at the top when the end of file is hit.
         The routine will read all of the data on a line.

         Also replace any _ in the string with a space
        */
        getline(wordFile, word);

        // if we are at the end of the file
        if (not wordFile) {
           // reset
           wordFile.close();
           wordFile.open(WORD_FILE_NAME.c_str());
           // read the word.
           getline(wordFile, word);
        }
    

        /* "fix" a word. 
           This involves:
              changeing the case of all letters to lowercase
              rmoving all _, and replacing them with a space.
        */

        for(i=0;i<word.size(); i++) {
           if (word[i] == '_') {
               word[i] = ' ';
           }
           word[i] = tolower(word[i]);
        }

        // logic to play a game.
        turn = 1;
        badLetters = "";
        solvedWord = "";

        // this constructs a word with _ for valid letters and 
	//  everything else in place
        // If the input is "hello world!" the output is "_____ _____!"
        for(i=0;i<word.size();i++) {
           if (isalpha(word[i]) ) {
	       solvedWord += '_';
	   } else {
	       solvedWord += word[i];
   	   }
        }

        // if _ is in the guessed word, then it is not done.
        // If there are RIGHT_LEG_COUNT (or more?) letters the player has lost
        // This is essentually while not won or lost
        while(solvedWord.find('_') != string::npos 
              and badLetters.size() < RIGHT_LEG_COUNT) {
  	    turn ++;

            // draw the gallows and hanging body and the word

    // Nasty routine to draw the gallows and the poor fellow dangling.
    //
    // This uses the fact that the number of incorrect letters determines
    // how far the suspect has been hung.
    // top of gallows
    cout << " +--+" << endl;
    cout << " |  |" << endl;

    // arms and head if needed
    cout << " | ";
    if (badLetters.size() >= LEFT_ARM_COUNT) {
       cout << LEFT_ARM;
    } else {
        cout << " ";
    }

    if (badLetters.size() >= HEAD_COUNT) {
       cout << HEAD;
    } else {
        cout << " ";
    }

    if (badLetters.size() >= RIGHT_ARM_COUNT) {
       cout << RIGHT_ARM;
    } else {
        cout << " ";
    }

    cout << endl;

    // main body
    cout << " |  ";
    if (badLetters.size() >= BODY_COUNT) {
       cout << BODY;
    } else {
        cout << " ";
    }

    cout << endl;

    // legs
    cout << " | ";
    if (badLetters.size() >= LEFT_LEG_COUNT) {
       cout << LEFT_LEG;
    } else {
        cout << " ";
    }
    cout << " "; 
    if (badLetters.size() >= RIGHT_LEG_COUNT) {
       cout << RIGHT_LEG;
    } else {
        cout << " ";
    }
    cout << endl;

    // air to dangle in
    cout << " |" << endl;  

    // platorm
    cout << "_+_______ ";
  
    // the word
    for (i=0;i<solvedWord.size();i++) {
       cout << solvedWord[i] << " ";
    }
    cout << endl;

            // stats
            cout << "Turn: " << turn << endl;
            cout << "Incorrect Letters: " <<   badLetters << endl;
            cout << endl;

            // ask the player for a letter. 
            // only accept a-z.
            // convert the case to lower case.
            do {
               cout << "Guess a letter (a-z) => ";
               cin >> letter;
            } while (not isalpha(letter));

            letter = tolower(letter);

            /* decide if the guessed letter is in the word
               If so it will add that letter to the correct guess
               if not it will add the letter to the bad letters */

           if (word.find(letter) != string::npos) {
              i = word.find(letter);
              while (i != string::npos) {
                  solvedWord[i] = word[i];
	          i = word.find(letter,i+1);
              }
           } else {
               badLetters += letter;
           }
        }

        // inform the player of a win or loss.
        if(badLetters.size() >= RIGHT_LEG_COUNT) {

           // Nasty routine to draw the gallows and the poor fellow dangling.
           //
           // This uses the fact that the number of incorrect letters determines
           // how far the suspect has been hung.
           // top of gallows
           cout << " +--+" << endl;
           cout << " |  |" << endl;

           // arms and head if needed
           cout << " | ";
           if (badLetters.size() >= LEFT_ARM_COUNT) {
              cout << LEFT_ARM;
           } else {
               cout << " ";
           }

           if (badLetters.size() >= HEAD_COUNT) {
              cout << HEAD;
           } else {
               cout << " ";
           }

           if (badLetters.size() >= RIGHT_ARM_COUNT) {
              cout << RIGHT_ARM;
           } else {
               cout << " ";
           }

           cout << endl;

           // main body
           cout << " |  ";
           if (badLetters.size() >= BODY_COUNT) {
              cout << BODY;
           } else {
               cout << " ";
           }

           cout << endl;

           // legs
           cout << " | ";
           if (badLetters.size() >= LEFT_LEG_COUNT) {
              cout << LEFT_LEG;
           } else {
               cout << " ";
           }
           cout << " "; 
           if (badLetters.size() >= RIGHT_LEG_COUNT) {
              cout << RIGHT_LEG;
           } else {
               cout << " ";
           }
           cout << endl;

           // air to dangle in
           cout << " |" << endl;  

           // platorm
           cout << "_+_______ ";
  
           // the word
           for (i=0;i<solvedWord.size();i++) {
              cout << solvedWord[i] << " ";
           }
           cout << endl;


            // stats
            cout << "Turn: " << turn << endl;
            cout << "Incorrect Letters: " <<   badLetters << endl;
            cout << endl;
	    cout << "You have been convicted and hung!" << endl;
	  cout << "The word was   " << word << endl;
	  cout << "Your guess was " << solvedWord << endl;
        } else {
            cout << "You are innocent" << endl;
	    cout << "You guessed " << word << " correctly!"<< endl;
	    wins ++;
        }
        cout << endl;

       // ask the player if they wish to play another game.
	answer = 'x';
 
        do {
            cout << "Do you want to play another game?";
            cout << " (y/n) => ";
	    cin >> answer;
	    answer = tolower(answer);
        } while (answer != 'y' and answer != 'n');
        done = answer != 'y'; 
    } // end of main loop

    wordFile.close();

    // print the final statistics.
    cout << endl;

    cout << "Games Played: " << games << endl;
    cout << "Games Won " << wins << endl;
    cout << "Thanks for playing! " << endl;

    return 0;
}