#include<iostream>
#include<ctype.h>
#include "TTTGame.h"

#include "TTT.h"

using namespace std;

/* prototypes for the User Interface functions */
bool commandLineUI (int);
void showBoard ();
void gameOver (int);
void showStats ();
void showAbout ();
void showCommands ();
void showHelp ();

/*
 * Class:     TTT
 * Method:    cmain
 * Signature: ()I
 */
JNIEXPORT jint JNICALL Java_TTT_cmain
  (JNIEnv * jenv, jobject job)
{
 /* create the instance of the Tic-Tac-Toe Game */
 TTTGame *game = TTTGame::createTTTGame();
 
 /* start the first game */
 cout << "Welcome to Tic-Tac-Toe";
 if (game->newGame () == USERPLAYER)
    cout << ", you go first." << endl;
 else
    cout << ", the computer goes first." << endl;

 /* Call the user interface function */ 
 commandLineUI ( 1); 

 return 4;
}


bool commandLineUI ( int p )
{
 bool cont = true;
 char input [100];
 char command, junk;
 int i;
 int j;
 int moveValue;

 /* access the instance of the Tic-Tac-Toe Game */
 TTTGame *game = TTTGame::getGame();

 /* loop until user enters command to quit */
 while (cont)
   {
    /* check for computer player's move */
    if (game->getTurn() == COMPUTERPLAYER)
       {
        moveValue = game->computerMove();
        if (moveValue > VALIDMOVE)
           {
            gameOver(moveValue);
            continue;
           }
       }

    /* print current board */
    showBoard();
    cout << "Enter Command (1-9|n|s|h|?|a|q): ";

    /* read until the first non-white space character */
    command = cin.get();
    while (isspace(command))
         command = cin.get();
    
    /* read the remaining characters until the end of line */
    junk = cin.get();
    while (junk != '\n')
         junk = cin.get();

    tolower(command);

    if (isdigit(command))
       {
        /* User entered a move */
        moveValue = game->userMove(command);
        if (moveValue > VALIDMOVE)
           gameOver(moveValue);
        else if (moveValue == INVALIDMOVE)
           cout << "Command \"" << command << "\" is not valid."
		<< endl;
        else if (moveValue == POSITIONINUSE)
	   cout << "Position " << command << " has already been picked."
		<< "  Select another position." << endl;
       } 
 
    else if (command == 's')
       {
        showStats();
       }

    else if (command == 'a')
       {
        showAbout();
       }

    else if (command == 'h')
       {
        showHelp();
       }

    else if (command == '?')
       {
        showCommands();
       }

    else if (command == 'n')
      {
       cout << "Starting new Game"; 
       if (game->newGame () == USERPLAYER)
          cout << ", you go first." << endl;
       else
          cout << ", the computer goes first." << endl;
      }

    else if (command == 'q')
       {
        showStats();
        cout << "Quitting Program.  Goodbye" << endl;
        cont = false;
       }

    else
       cout << "Command \"" << command << "\" is not valid."
		<< endl;
   }

 return true;
}

void showStats()
{
 /* access the instance of the Tic-Tac-Toe Game */
 TTTGame *game = TTTGame::getGame();

 cout << "There have been " << game->getNumStarted()
	<< " game(s) started.\nYou have won " << game->getNumWon()
	<< " game(s).\nYou have lost " << game->getNumLost()
	<< " games(s).\nThere have been " << game->getNumCats()
	<< " \"cats\" game(s) (no winner or loser)." << endl;
}

void showBoard()
{
 /* access the instance of the Tic-Tac-Toe Game */
 TTTGame *game = TTTGame::getGame();
 int j;

 /* print current board */
 for (j=1; j<=9; ++j)
     {
      cout << " " << game->getPosition(j) << " ";
      if ((j == 3) || (j == 6))
         cout << "\n---|---|---\n";
      else if (j == 9)
         cout << endl;
      else 
         cout << "|";
    }
}


void gameOver (int status)
{
 cout << endl;
 if (status == WINGAME)
    cout << "You won the game!\n"; 
 else if (status == LOSEGAME)
    cout << "You lost the game!\n"; 
 else
    cout << "\"Cats\" game(no winner or loser)\n";
 showBoard();


 /* access the instance of the Tic-Tac-Toe Game */
 TTTGame *game = TTTGame::getGame();
 cout << "\nStarting a new Game";
 if (game->newGame () == USERPLAYER)
    cout << ", you go first." << endl;
 else
    cout << ", the computer goes first." << endl;
}


void showAbout ()
{
 cout << "Tic-Tac-Toe Game\n\nWritten by Pat Troy"
	<< "\nFebruary 2004 for CS 422" << endl;
}

void showCommands ()
{
 cout << "The commands for Tic-Tac-Toe are:\n"
	<< " 1-9: Place an \'X\' in the corresponding\n"
	<< "\tlocation on the game grid\n"
	<< " n:   Start a New Game\n"
	<< " s:   Show Statistics about the games played\n"
	<< " h:   Show Information on how to play\n"
	<< " ?:   Show the list of commands\n"
	<< " q:   Quit the game\n"
	<< " a:   Display information about the program" 
	<< endl;
}

void showHelp ()
{
 cout <<   "The game Tic-Tac-Toe is played on a 3x3 grid.\n"
	<< "The goal of the game is to mark 3 positions in\n"
	<< "a row on the grid before your opponent marks 3\n"
	<< "positions on the grid.  The positions can be either\n" 
	<< "horizontal, vertical or diagonal.\n\n"
	<< "You will mark your positions with an \'X\' while\n"
	<< "your computer opponent will mark its positions with\n"
	<< "an \'O\'.  The player that goes first will alternate\n"
	<< "with the start of each new game."
	<< endl;
}