<?php
session_start();

/**************
* File: Character.php (version 3, lesson 4)
* 
* Assignment:
*		1) Fill in the empty logic in this new array-based maze game so the player now has to navigate a much larger maze before they
*		    can find the treasure.
*		2) If you get everything working, try making a larger maze with more holes by adding to the array
*         
* Tutorial Goals:
*		0) Intoduction to forms -- DONE
*		1) Make the treasure be located in a random direction -- DONE
*		2) Make the player walk around a larger area before they find the treasure (arrays)
*		3) Let the player pick up items
*		4) Let the player use items
*		5) Give the player health
*		6) Let the player fight monsters
*		7) Put in obstacles that block the player's path
*		8) Put in more pits the player can fall into and die
*		9) Put keys into the maze
*		10) Put locked doors that can only be opened if you have a key
*		11) Store the player's information in a database (mysql)
*		12) Load the player's information from a database
*		13) Make the player login before they can start playing (mysql & php combined)
*		14) Send the player an email if they forget their password
*		15) Allow other players to create an account on the game
*		16) Let the player talk to other members with messages
*		17) Let the player post on a message board
*
* Techniques Taught This Lesson:
*		1) arrays, multi-dimensional arrays
*		2) array keys and values
*		3) using multiple session variables
*		4) accessing session data using variables
**************/

/************
*                 GAME MAP/MAZE
*	0	1	2	3	4	5	6
* 0	W	W	W	W	W	W	W
* 1	W	S	E	E	W	E	W
* 2	W	W	X	E	E	E	W
* 3	W	E	E	E	T	X	W
* 4	W	W	W	W	W	W	W
************/

/************
*    MAP/MAZE KEY
* S is our starting position
* X is a hole
* W is a wall
* E is an open path
* T is the treasure
************/

/*************
*     MAP/MAZE ARRAY
*************/
$maze = array();

$maze[0][0] = "W";
$maze[0][1] = "W";
$maze[0][2] = "W";
$maze[0][3] = "W";
$maze[0][4] = "W";
$maze[0][5] = "W";
$maze[0][6] = "W";

$maze[1][0] = "W";
$maze[1][1] = "S"; //this is where we're starting from
$maze[1][2] = "E";
$maze[1][3] = "E";
$maze[1][4] = "W";
$maze[1][5] = "E";
$maze[1][6] = "W";

$maze[2][0] = "W";
$maze[2][1] = "W";
$maze[2][2] = "X"; //here's a pit
$maze[2][3] = "E";
$maze[2][4] = "E";
$maze[2][5] = "E";
$maze[2][6] = "W";

$maze[3][0] = "W";
$maze[3][1] = "E";
$maze[3][2] = "E";
$maze[3][3] = "E";
$maze[3][4] = "T"; //here is our treasure
$maze[3][5] = "X"; //another pit
$maze[3][6] = "W";

$maze[4][0] = "W";
$maze[4][1] = "W";
$maze[4][2] = "W";
$maze[4][3] = "W";
$maze[4][4] = "W";
$maze[4][5] = "W";
$maze[4][6] = "W";

if (!$_SESSION['x']) //haven't played this game yet
{
        //we need to make sure they start at the S position in the maze
	$_SESSION['x'] = 1;
	$_SESSION['y'] = 1;
}

if ($_POST['reset']) //they're starting a new game
{
        //if this is a new game then we have to reset the gameover value to false
	//because this is a new game
	$_SESSION['gameover'] = false;
	
	//reset their position in the maze
	//to the player's starting position
	$_SESSION['x'] = 1;
	$_SESSION['y'] = 1;
	
	//undo which button they pressed
	UNSET($_POST); 
}

if ($_POST['right'])  //they pressed the right button
{
	//we add 1 to the player's y value to move them over right
	//but we have to check what's in that spot before we update their location
	
	if ($maze[$_SESSION['x']][$_SESSION['y']+1] == "T") //the treasure is in this direction
	{
		echo "You found the treasure!";
		$_SESSION['gameover'] = true;
                $_SESSION['y'] = $_SESSION['y'] + 1;
	}
	else
	{
		if ($maze[$_SESSION['x']][$_SESSION['y']+1] == "W") //hit a wall
		{
			echo "You hit a wall!";
			//don't update their position, they can't move here
		}

                else if ($maze[$_SESSION['x']][$_SESSION['y']+1] == "S") //starting position
		{
			echo "You're back where you started!";
			//don't update their position, they can't move here
                       $_SESSION['y'] = $_SESSION['y'] + 1;
		}
		
		else if ($maze[$_SESSION['x']][$_SESSION['y']+1] == "E") //this is an empty space
		{
			echo "You moved right one space.";
			//empty space, move them to this new location
			$_SESSION['y'] = $_SESSION['y'] + 1;
		}
		
		else if ($maze[$_SESSION['x']][$_SESSION['y']+1] == "X") //fell into a hole!!
		{
			echo "You fell into a pit!";
                        $_SESSION['y'] = $_SESSION['y'] + 1;
			$_SESSION['gameover'] = true;
		}
	}
}

if ($_POST['up'])  //they pressed the up button
{
	//we add 1 to the player's x value to move them up
	if ($maze[$_SESSION['x']+1][$_SESSION['y']] == "T") //the treasure is in this direction
	{
		echo "You found the treasure!";
		$_SESSION['gameover'] = true;
                $_SESSION['x'] = $_SESSION['x'] + 1;
	}
	else
	{
		if ($maze[$_SESSION['x']-1][$_SESSION['y']] == "W") //hit a wall
		{
			echo "You hit a wall!";
			//don't update their position, they can't move here
		}

                else if ($maze[$_SESSION['x']-1][$_SESSION['y']] == "S") //starting position
		{
			echo "You're back where you started!";
			//don't update their position, they can't move here
                       $_SESSION['x'] = $_SESSION['x'] - 1;
		}
		
		else if ($maze[$_SESSION['x']-1][$_SESSION['y']] == "E") //this is an empty space
		{
			echo "You moved forward one space.";
			//empty space, move them to this new location
			$_SESSION['x'] = $_SESSION['x'] - 1;
		}
		
		else if ($maze[$_SESSION['x']-1][$_SESSION['y']] == "X") //fell into a hole!!
		{
			echo "You fell into a pit!";
                        $_SESSION['x'] = $_SESSION['x'] - 1;
			$_SESSION['gameover'] = true;
		}
	}
}

if ($_POST['down'])  //they pressed the down button
{
	//we subtract 1 to the player's x value to move them up
	if ($maze[$_SESSION['x']+1][$_SESSION['y']] == "T") //the treasure is in this direction
	{
		echo "You found the treasure!";
		$_SESSION['gameover'] = true;
                $_SESSION['x'] = $_SESSION['x'] + 1;
	}
	else
	{
		if ($maze[$_SESSION['x']+1][$_SESSION['y']] == "W") //hit a wall
		{
			echo "You hit a wall!";
			//don't update their position, they can't move here
		}

                else if ($maze[$_SESSION['x']+1][$_SESSION['y']] == "S") //starting position
		{
			echo "You're back where you started!";
			//don't update their position, they can't move here
                       $_SESSION['x'] = $_SESSION['x'] + 1;
		}
		
		else if ($maze[$_SESSION['x']+1][$_SESSION['y']] == "E") //this is an empty space
		{
			echo "You moved back one space.";
			//empty space, move them to this new location
			$_SESSION['x'] = $_SESSION['x'] + 1;
		}
		
		else if ($maze[$_SESSION['x']+1][$_SESSION['y']] == "X") //fell into a hole!!
		{
			echo "You fell into a pit!";
                        $_SESSION['x'] = $_SESSION['x'] + 1;
			$_SESSION['gameover'] = true;
		}
	}
}

if ($_POST['left'])  //they pressed the left button
{
	//we subtract 1 from the player's y value to move them over left
	if ($maze[$_SESSION['x']][$_SESSION['y']-1] == "T") //the treasure is in this direction
	{
		echo "You found the treasure!";
		$_SESSION['gameover'] = true;
                $_SESSION['y'] = $_SESSION['y'] - 1;
	}
	else
	{
		if ($maze[$_SESSION['x']][$_SESSION['y']-1] == "W") //hit a wall
		{
			echo "You hit a wall!";
			//don't update their position, they can't move here
		}

                else if ($maze[$_SESSION['x']][$_SESSION['y']-1] == "S") //starting position
		{
			echo "You're back where you started!";
			//don't update their position, they can't move here
                       $_SESSION['y'] = $_SESSION['y'] - 1;
		}
		
		else if ($maze[$_SESSION['x']][$_SESSION['y']-1] == "E") //this is an empty space
		{
			echo "You moved left one space.";
			//empty space, move them to this new location
			$_SESSION['y'] = $_SESSION['y'] - 1;
		}
		
		else if ($maze[$_SESSION['x']][$_SESSION['y']-1] == "X") //fell into a hole!!
		{
			echo "You fell into a pit!";
                        $_SESSION['y'] = $_SESSION['y'] - 1;
			$_SESSION['gameover'] = true;
		}
	}
}

/*******************
* Purpose: Draw the current map to the screen with a red C marking
*          the character's current position. The C turns green if
*          they've found the treasure
* Precondition: This must have the characters x and y values, the
*               map they're using, and the width/height of that map
* Postcondition: Everything is drawn directly on the screen with the
*               character's coordinates at the bottom
******************/
function drawMap($x, $y, $map, $mapwidth, $mapheight)
{

  //we want a nice header at the top
  echo "<center><b>Game Map</b><br>
       <table cellpadding=2 cellspacing=2>"; //now we start building the table

  //now we want to add an extra row at the top that just shows the coordinate numbers
  //across the top of the map.

  echo "<tr><td></td>"; //we start a row, and add an extra blank column to offset the 
                        //coordinate numbers added over the map (so 0 starts over the first W in the map)


  for ($i = 0; $i <= $mapwidth; $i++) //now we want to draw numbers for the width of the map
    echo "<td>$i</td>"; //this shows the numbers in a column

  echo "</tr>"; //that's the end of this row, we now have all the numbers across the top of the map
    
   //now it's time to start drawing the map

   for ($i = 0; $i <= $mapheight; $i++) //we want to draw the entire height
   {
     echo "<tr>"; //each row in the map starts off with a number as well
     echo "<td>$i</td>"; //so we can tell which coordinate it's at

      //now we want to draw what's in that part of the map for the entire width
      for ($j = 0; $j <= $mapwidth; $j++)
      {
        if ($x == $i && $y == $j && $map[$i][$j] != "T") //if this is not treasure
             echo "<td><b><font color=\"red\">C</font></b></td>"; //and the character is standing here
                                                                  //draw the C instead of what's on the map
                                                                  //and make it show up green

        else if ($x == $i && $y == $j && $map[$i][$j] == "T") //this is the treasure
             echo "<td><b><font color=\"green\">C</font></b></td>"; //and the character is standing here
                                                                    //draw the C instead of what's on the map
                                                                    //and make it show up green
        else
             echo "<td>" . $map[$i][$j] . "</td>"; //this is just a lonely map space, show whatever it is
      }
     echo "</tr>";
   }

   //now our table is done, we can end it, and under that
   //we'll show the coordinates of the character so we can
   //tell what spot they're inside of the map numerically
   echo "</table><br>"; 
   echo "Your coordinates are: ($x, $y)";
   echo "</center><br>";
}

//we're only going to show the map
//if they decide they want to cheat...
if ($_GET['showmap'])
{
    //call our custom draw map function
    //make sure we pass it all the parameters we need

    drawMap($_SESSION['x'], $_SESSION['y'], $maze, 6, 4);
}
?>
<html>
<head>
<title>Pits of Doom</title>
</head>
<body>
<form action="#" method="post">
<center>Welcome to my little text action game. This is a really simple game.
You're standing in a maze and you can move in four directions, up, down, left and right.
One of the four squares has a magical treasure chest on it. Beware! You only get one guess to find the treasure chest!! If you guess wrong you'll fall into the pit of doom and die...
<br><br>
<?php
	if ($_SESSION['gameover'] == false)  //the game isn't over yet
	{
?>
How will you move?
<input type="submit" name="left" value="<-" />
<input type="submit" name="up" value="/\" />
<input type="submit" name="down" value="\/" />
<input type="submit" name="right" value="->" /><br/>
<a href="?showmap=yes">or you can cheat and display the map...</a>
<?php
	}
	else //the game is over, they fell into a pit or found the treasure
		echo "<b>Game Over!</b>";
?>
<br/><br/>
<input type="submit" name="reset" value="Reset Game?" />
</form>
</body>
</html>