// Description: This is a computer version of the game hangman, the user
// can play against a 2nd player or the computer, and he can enter how many 
// guesses he gets,
//
 
// Start of program
 
// Header file definitions
 
#include <iostream>				// Standard input/output
#include <string>				// String manipulation
#include <cctype>				// Character manipulation and testing
#include <fstream>				// File stream
#include <cstdlib>				// Used for random function
 
#include "DRAW.h"				// Draws hangman
 
using namespace std;
 
// Function declerations
void DrawGallows(int State);
void instruction(int& choice);		// Gives instructions and gets choice
void usergame(int i);				// Plays 2nd user game
void compgame(int i);				// Plays against computer
void test(string word, char letter, int& numwrong, string& temp, int i);		// Tests current letter and replaces starred word
void lchosen(char letter, string& letterchosen, int& check, int& chosencounter, int i);			// Checks current letter and adds it to letters chosen output if not entered already
void rnd(string& word, int i);		// Gets random word from file
 
inline istream& Flush(istream& stream);				// Flushes cin stream
 
// Start of main
 
int main()
{	
	int i = 0;			// Counter variable for loops
	int exit = 0;		// Main loop exit variable
	int choice;			// Users inputed choice for type of game or to exit
 
	// Main control loop
 
	do {				// while exit != 1
		system("cls"); // Clear the screen
		instruction(choice);		// Give instructions
 
 
		switch(choice)
		{
		case 1:
			usergame(i);			// Calls user game
			break;
		case 2: 
			compgame(i);			// Calls computer game
			break;
		case 3:
			cout << "Goodbye" << endl;	// Exits
			exit = 1;
			break;
		default:
			cerr << "Invalid choice - try again" << endl;    // Invalid choice erroe
		}
	} while (exit != 1);
 
	// End main loop
 
	system("pause");
	return 0;
}
// End main
 
// Subprograms
// ---------------------------------------------------------------------
 
// Instructions subprogram
 
void instruction(int& choice)
{	
	cout << "			-Hangman-" << endl << endl;
	cout << "		Created by Kyle Burmark" << endl << endl;
	cout << "*****************************************" << endl;
	cout << endl;
	cout << " Enter -1- to play against user" << endl;
	cout << " Enter -2- to play against computer" << endl;
	cout << " Enter -3- to quit" << endl;
	cout << endl;
	cout << "*****************************************" << endl << endl;
 
	cout << "Choice: ";		// Get user choice
	cin >> choice;
 
	// Bad data type check
 
	while (!cin)
	{
		cerr << "Invalid character" << endl
			<< "Enter again - choice: ";
		Flush(cin);
		cin >> choice;
	}
 
	// End check
 
	system("cls");
}
 
// End instruction
 
// User game subprogram
 
void usergame(int i)
{
	int numguess = 0;			// Number of guesses player gets
	int numwrong = 0;			// Number of wrong guesses player has so far
	int check;					// A variable to test whether to check the letter entered in the test function
	int wordcheck;				// A variable to check whether the user has entered an invalid word
	int end = 0;				// A variable to test what to output to the user and to exit the usergame loop
	int chosencounter = 0;		// A counter to tell the replace function where to put the letter chosen in the letterchosen string
	char letter;				// User inputed letter
	string word;				// Word user is trying to guess
	string temp;				// Updated output word user sees
	string letterchosen = "                         ";		// Defines length of letterchosen string
 
	do {				// while user puts in guesses outside of allowed range
	cout << "How many chances does the person have (4 - 10): ";
	cin >> numguess;
	} while (numguess < 4 || numguess > 10);
 
	cout << "Enter word 2nd user: ";
	cin >> word;
 
 
	do {				// while user inputs bad word
		wordcheck = 0;
		for (int i = 0; i < word.length(); i++)
		{
			if (!isalpha(word.at(i)))
			{
				wordcheck = 1;
			}
		}
		if (wordcheck == 1)
		{
			cout << "Invalid - Enter word again: ";
			cin >> word; 
		}
	} while (wordcheck == 1);
 
	temp = word;		// Sets temp string length to word string length
 
	// Replace temp with stars loop
 
	for (i = 0; i < word.length(); i++)
	{
		temp.replace(i, 1, 1,'*');
	}
 
	// End loop
 
	system("cls");
 
	// Main game loop
 
	do {
 
 
		// Tests if user guessed word
 
		if (word == temp)
		{
			cout << endl << endl;
			cout << "You guessed it [ " << word << " ]" << endl << endl;
			system("pause");
			end = 1;
		}
 
		// Tests if user failed to guess word
 
		if (numwrong == numguess)
		{
			cout << endl << endl;
			cout << "You failed" << endl << endl;
			system("pause");
			end = 2;
		}
 
		// Play while above conditions aren't true
 
		if (end == 0)
		{
			cout << endl << endl << endl;
			cout << "Letters chosen: " << letterchosen << endl;
			cout << endl << endl << endl;
			cout << "Guesses left: " << numguess - numwrong << endl << endl; 
			cout << "    " << temp << endl << endl;
			cout << "Letter: ";
			cin >> letter;
 
			// Test for bad letter
 
			while (!isalpha(letter))
			{
				Flush(cin);
				cout << "Not a letter - enter letter: ";
				cin >> letter;
			}
 
			// End test
 
			lchosen(letter, letterchosen, check, chosencounter, i);
 
			// Test whether to check letter against correct word string
 
			if (check == 0)
			{
				test(word, letter, numwrong, temp, i);
			}
			else
			{
				;
			}
 
			// End test
 
			system("cls");
		}
 
		// End game
 
		system("cls");
	} while(end != 1 && end != 2);
 
	// End main game loop
 
	// Tests end variable to see what to display
 
	if (end == 2) 
	{
		cout << "Correct word was [ " << word << " ]" << endl << endl;
		system("pause");
	}
	if (end == 1)
	{
		cout << " ";
	}
 
	system("cls");
 
}
 
// End user game
 
// Start computer game
// See user game for variable and loop information
 
void compgame(int i)
{
	int numguess = 0;
	int numwrong = 0;
	int check;
	int end = 0;
	int chosencounter = 0;
	char letter;
	string word;
	string temp;
	string letterchosen = "                         ";
 
	do {
	cout << "How many chances do you want (4 - 10): ";
	cin >> numguess;
	} while (numguess < 4 || numguess > 10);
 
	rnd(word, i);		// Gets random word
	temp = word;
 
	for (i = 0; i < word.length(); i++)
	{
		temp.replace(i, 1, 1, '*');
	}
 
	system("cls");
 
	do {
        int State = 1;
	void DrawGallows(int State);
		if (word == temp)
		{
			cout << endl << endl;
			cout << "You guessed it [ " << word << " ]" << endl << endl;
			system("pause");
			end = 1;
		}
		if (numwrong == numguess)
		{
			cout << endl << endl;
			cout << "You failed" << endl << endl;
			system("pause");
			end = 2;
		}
		if (end == 0)
		{
			cout << endl << endl << endl;
			cout << "Letters chosen: " << letterchosen << endl;
			cout << endl << endl << endl;
			cout << "Guesses left: " << numguess - numwrong << endl << endl; 
			cout << "    " << temp << endl << endl;
			cout << "Letter: ";
			cin >> letter;
 
			while (!isalpha(letter))
			{
				Flush(cin);
				cout << "Not a letter - enter letter: ";
				cin >> letter;
			}
 
			lchosen(letter, letterchosen, check, chosencounter, i);
 
			if (check == 0)
			{
				test(word, letter, numwrong, temp, i);
			}
			else
			{
				;
			}
 
			system("cls");
		}
 
		system("cls");
	} while(end != 1 && end != 2);
 
	if (end == 2) 
		cout << "Correct word was [ " << word << " ]" << endl << endl;
		system("pause");
	if (end == 1)
		cout << endl;
 
	system("cls");
 
 
}
 
// End computer game
 
// Checks current letter chosen by user
 
void lchosen(char letter, string& letterchosen, int& check, int& chosencounter, int i)
{
	check = 0;
 
	// Check if letter is equal to any letter in letterchosen string loop
 
	for (i = 0; i < letterchosen.length(); i++)
	{
		if (letter == letterchosen.at(i))
		{
			check = 1;
		}
	}
 
	// End loop
 
	// Test if letter is already chosen
 
	if (check == 1)
	{
		cout << endl;
		cout << "Letter already chosen" << endl;
		system("pause");
	}
 
	// Puts letter in string if not chosen
 
	else
	{
		letterchosen.replace(chosencounter, 1, 1, letter);
		chosencounter++;
	}
 
}
 
// End lchosen function
 
// Tests whether letter is in word string
 
void test(string word, char letter, int& numwrong, string& temp, int i)
{
	int check2 = 0;		// Checks whether letter is in word string, = 1 if it is
 
	// Check for letter match loop
 
	for (i = 0; i < word.length(); i++)
	{
		if (letter == word.at(i))
		{
			temp.replace(i, 1, 1, letter);
			check2 = 1;
		}
	}
 
	// End loop
 
	// Displays "wrong letter" if user inputed bad letter
 
	if (check2 == 0)
	{
		cout << endl;
		cout << "Wrong letter" << endl;
		system("pause");
		numwrong++;
 
	}
}
 
// End test function
 
// Gets random word
 
void rnd(string& word, int i)
{
 
	int x;					// Random number to pass to word file loop
	ifstream ins;			// File stream
 
	srand(time(NULL));		// Gets better random number based on time
	x = rand()%100;			// Gets number 0 - 99 
	ins.open("words.txt");	// Opens random word file
 
	// Tests for bad file and gets word if not a bad file
 
	if (ins.fail())
	{
		cerr << "Words.txt is not in same folder as hangman.exe, " << endl
			<< "put in correct file and run again and make sure it's " << endl
			<< "called words.txt" << endl;
		system("pause");
 
		main();
	}
	else
	{
		for (i = 0; i < (x + 1); i++)
		{
			getline(ins, word);
		}
 
	}
 
	// End test
 
	ins.close();		// Close file
}
 
// End random function
 
// This will Draw the gallows according to the state
void DrawGallows(int State)
{
 if(State==6)
 {
  // The \\ will translate as '\' because it is a special char
  cout<<endl<<endl
   <<"   +----+     "<<endl
   <<"   |    |     "<<endl
   <<"   |    O     "<<endl
   <<"   |   /|\\   "<<endl
   <<"   |   / \\   "<<endl
   <<"   |Your Dead "<<endl
   <<"  ============"<<endl<<endl;
 }
 else if(State==5)
 {
  cout<<endl<<endl
   <<"   +----+  "<<endl
   <<"   |    |  "<<endl
   <<"   |    O  "<<endl
   <<"   |   /|\\ "<<endl
   <<"   |     \\ "<<endl
   <<"   |       "<<endl
   <<"  ============"<<endl<<endl;
 }
 else if(State==4)
 {
  cout<<endl<<endl
   <<"   +----+  "<<endl
   <<"   |    |  "<<endl
   <<"   |    O  "<<endl
   <<"   |   /|\\ "<<endl
   <<"   |       "<<endl
   <<"   |       "<<endl
   <<"  ============="<<endl<<endl;
 }
 else if(State==3)
 {
  cout<<endl<<endl
   <<"   +----+  "<<endl
   <<"   |    |  "<<endl
   <<"   |    O  "<<endl
   <<"   |   /|  "<<endl
   <<"   |       "<<endl
   <<"   |       "<<endl
   <<"  ============="<<endl<<endl;
 }
 else if(State==2)
 {
  cout<<endl<<endl
   <<"   +----+  "<<endl
   <<"   |    |  "<<endl
   <<"   |    O  "<<endl
   <<"   |    |  "<<endl
   <<"   |       "<<endl
   <<"   |       "<<endl
   <<"  ============="<<endl<<endl;
 }
 else if(State==1)
 {
  cout<<endl<<endl
   <<"   +----+  "<<endl
   <<"   |    |  "<<endl
   <<"   |       "<<endl
   <<"   |       "<<endl
   <<"   |       "<<endl
   <<"   |       "<<endl
   <<"  ============="<<endl<<endl;
 }
 
}
inline istream& Flush(istream& stream)
{
	stream.clear();
	int chars_to_skip = stream.rdbuf()->in_avail();
	return stream.ignore(chars_to_skip);
}
 
// End flush function
 
// End subprogams
 
// End program