# MAIN.PY: Matt Gallivan, 2007, Terra Pugna
import pygame, sys, os
from pygame.locals import *

# -- Define DRAW functions --
def terrainDraw(terrainList):
    terrainType = pygame.image.load("mountain.png")
    terrainIdentifier = 0
    xCoordinate = 0
    yCoordinate = 0
    displayX = 768
    displayY = 1024
    n = 0
    for x in range(0, displayX, 32):
        for y in range(0, displayY, 32):
            terrainIdentifier = terrainList[n]
            if terrainIdentifier == 1:
                terrainType = pygame.image.load("grass.png")
            elif terrainIdentifier == 2:
                terrainType = pygame.image.load("mountain.png")
            else:
                terrainType = pygame.image.load("river.png")
            screen.blit(terrainType, (xCoordinate,yCoordinate))
            xCoordinate += 32
            n += 1
        yCoordinate += 32
        xCoordinate = 0
        
def windowDraw():
    window = pygame.display.set_mode((1024,768))
    pygame.display.set_caption('RPJEE')
    
# -- Define LOAD functions --
def loadImageFile( fileName, useColorKey = False ):
    try:
        image = pygame.image.load( fileName )
    except pygame.error, message:
        print "Cannot load image:", fileName
        raise SystemExit, message

    image = image.convert()

    if useColorKey is True:
        colorkey = image.get_at( (0,0) )
        image.set_colorkey( colorkey, RLEACCEL )
    return image

# -- Define PARSER functions --
def mapParser(terrainList):
    increment = 1
    while increment <= 768:
        f = open('C:/Documents and Settings/Matt/Desktop/RPJ/terrain.txt', 'r+')
        terrainList.append(f.read(1))
        increment += 1
    f.close()
    return terrainList

# -- Initialise pyGame and set up the window --
pygame.init()
windowDraw()
terrainList = []
screen = pygame.display.get_surface()
mapParser(terrainList)
terrainDraw(terrainList)
background = screen.copy()

# -- Load images and set the surfaces --
loadImageFile("hero-n.gif", True)
loadImageFile("hero-w.gif", True)
loadImageFile("hero-e.gif", True)
loadImageFile("hero-s.gif", True)
loadImageFile("grass.png", True)
loadImageFile("mountain.png", True)
loadImageFile("river.png", True)
backgroundimage = pygame.image.load("river.png")
hero_surface_n = pygame.image.load("hero-n.gif")
hero_surface_w = pygame.image.load("hero-w.gif")
hero_surface_e = pygame.image.load("hero-e.gif")
hero_surface_s = pygame.image.load("hero-s.gif")
heroimage = hero_surface_s

# -- Set user input values --
keys = {pygame.K_LEFT : False, pygame.K_RIGHT : False, pygame.K_UP : False, pygame.K_DOWN : False}
heroX = 50
heroY = 50

# -- MAIN GAME LOOP --
while True: 
    for event in pygame.event.get(): 
       if event.type == QUIT: 
          sys.exit(0)
       elif event.type == pygame.KEYDOWN:
          keys[event.key] = True
       elif event.type == pygame.KEYUP:
          keys[event.key] = False
    if keys[pygame.K_LEFT]:
        heroX -= 1
        heroimage = hero_surface_w
    if keys[pygame.K_RIGHT]:
        heroX += 1
        heroimage = hero_surface_e
    if keys[pygame.K_UP]:
        heroY -= 1
        heroimage = hero_surface_n
    if keys[pygame.K_DOWN]:
        heroY += 1
        heroimage = hero_surface_s
    screen.blit(background, (0,0))
    screen.blit(heroimage, (heroX,heroY))
    pygame.display.update()