worm

# Wormy (a Nibbles clone)
# By Al Sweigart al@inventwithpython.com
# http://inventwithpython.com/pygame
# Released under a "Simplified BSD" license

import random
import pygame
import sys
import time
from pygame.locals import *

FPS = 15
WINDOWWIDTH = 640
WINDOWHEIGHT = 480
CELLSIZE = 20
assert WINDOWWIDTH % CELLSIZE == 0, "Window width must be a multiple of cell size."
assert WINDOWHEIGHT % CELLSIZE == 0, "Window height must be a multiple of cell size."
CELLWIDTH = int(WINDOWWIDTH / CELLSIZE)
CELLHEIGHT = int(WINDOWHEIGHT / CELLSIZE)
TIMEOUT = 5
SECOND_WORM_TIMEOUT = 5  # should be 45

#             R    G    B
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)
GREEN = (0, 255, 0)
DARKGREEN = (0, 155, 0)
DARKGRAY = (40, 40, 40)
BLUE = (0, 0, 255)
DARKBLUE = (0, 0, 155)
BGCOLOR = BLACK

RED_DARK = (196, 0, 0)
RED_FLASH = (255, 75, 75)

UP = 'up'
DOWN = 'down'
LEFT = 'left'
RIGHT = 'right'

HEAD = 0  # syntactic sugar: index of the worm's head


def main():
    global FPSCLOCK, DISPLAYSURF, BASICFONT, TIMEOUT

    pygame.init()
    FPSCLOCK = pygame.time.Clock()
    DISPLAYSURF = pygame.display.set_mode((WINDOWWIDTH, WINDOWHEIGHT))
    BASICFONT = pygame.font.Font('freesansbold.ttf', 18)
    pygame.display.set_caption('Wormy')

    showStartScreen()
    while True:
        runGame()
        showGameOverScreen()


def runGame():
    # Set a random start point.
    startx = random.randint(5, CELLWIDTH - 6)
    starty = random.randint(5, CELLHEIGHT - 6)
    wormCoords = [{'x': startx, 'y': starty},
                  {'x': startx - 1, 'y': starty},
                  {'x': startx - 2, 'y': starty}]
    direction = RIGHT

    # Start the apple in a random place.
    apple = getRandomLocation()

    score = 0

    timeFrame = time.time()
    secondWormTimeFrom = time.time()
    secondWormInitialised = False
    wormCoordsSecond = []
    secondWormTimeout = 1
    flashyApples = []

    while True:  # main game loop
        for event in pygame.event.get():  # event handling loop
            if event.type == QUIT:
                terminate()
            elif event.type == KEYDOWN:
                if (event.key == K_LEFT or event.key == K_a) and direction != RIGHT:
                    direction = LEFT
                elif (event.key == K_RIGHT or event.key == K_d) and direction != LEFT:
                    direction = RIGHT
                elif (event.key == K_UP or event.key == K_w) and direction != DOWN:
                    direction = UP
                elif (event.key == K_DOWN or event.key == K_s) and direction != UP:
                    direction = DOWN
                elif event.key == K_ESCAPE:
                    terminate()
                if secondWormInitialised:
                    directionSecond = getDirectionSecondWorm(oldDirection=directionSecond)

        if not secondWormInitialised and secondWormTimeFrom + SECOND_WORM_TIMEOUT <= time.time():
            # set random start point for the second worm
            startxSecond = random.randint(5, CELLWIDTH - 6)
            startySecond = random.randint(5, CELLHEIGHT - 6)
            wormCoordsSecond = [{'x': startxSecond, 'y': startySecond},
                                {'x': startxSecond - 1, 'y': startySecond},
                                {'x': startxSecond - 2, 'y': startySecond}]

            directionSecond = getDirectionSecondWorm()
            secondWormInitialised = True

        # check if the worm has hit itself or the edge
        if wormCoords[HEAD]['x'] == -1 or wormCoords[HEAD]['x'] == CELLWIDTH or wormCoords[HEAD]['y'] == -1 or \
                wormCoords[HEAD]['y'] == CELLHEIGHT:
            return  # game over
        for wormBody in wormCoords[1:]:
            if wormBody['x'] == wormCoords[HEAD]['x'] and wormBody['y'] == wormCoords[HEAD]['y']:
                return  # game over

        # check if worm has eaten an apply
        if wormCoords[HEAD]['x'] == apple['x'] and wormCoords[HEAD]['y'] == apple['y']:
            score += 1
            # don't remove worm's tail segment
            apple = getRandomLocation()  # set a new apple somewhere
        else:
            del wormCoords[-1]  # remove worm's tail segment

        if checkFlashyApple(wormCoords, flashyApples):
            score += 2

        # move the worm by adding a segment in the direction it is moving
        newHead = {}
        if direction == UP:
            newHead = {'x': wormCoords[HEAD]['x'], 'y': wormCoords[HEAD]['y'] - 1}
        elif direction == DOWN:
            newHead = {'x': wormCoords[HEAD]['x'], 'y': wormCoords[HEAD]['y'] + 1}
        elif direction == LEFT:
            newHead = {'x': wormCoords[HEAD]['x'] - 1, 'y': wormCoords[HEAD]['y']}
        elif direction == RIGHT:
            newHead = {'x': wormCoords[HEAD]['x'] + 1, 'y': wormCoords[HEAD]['y']}
        wormCoords.insert(0, newHead)

        if timeFrame + TIMEOUT <= time.time():
            flashyApples = getFlashyApples()
            timeFrame = time.time()

        if secondWormInitialised:
            availableDirections = [LEFT, RIGHT, UP, DOWN]
            changeDirection = False
            if wormCoordsSecond[HEAD]['x'] <= 0:
                availableDirections.pop(availableDirections.index(LEFT))
                changeDirection = True
            if wormCoordsSecond[HEAD]['x'] >= CELLWIDTH - 1:
                availableDirections.pop(availableDirections.index(RIGHT))
                changeDirection = True
            if wormCoordsSecond[HEAD]['y'] <= 0:
                availableDirections.pop(availableDirections.index(UP))
                changeDirection = True
            if wormCoordsSecond[HEAD]['y'] >= CELLHEIGHT - 1:
                availableDirections.pop(availableDirections.index(DOWN))
                changeDirection = True
            if changeDirection:
                directionSecond = getDirectionSecondWorm(availableDirections)
            runSecondWorm(wormCoordsSecond, directionSecond)

        drawGame(wormCoords, apple, flashyApples, score, wormCoordsSecond)

        FPSCLOCK.tick(FPS)


def getDirectionSecondWorm(possibleDirections=[UP, RIGHT, DOWN, LEFT], oldDirection=''):
    # if oldDirection == UP and DOWN in possibleDirections:
    #     possibleDirections.pop(possibleDirections.index(DOWN))
    #
    # if oldDirection == DOWN and UP in possibleDirections:
    #     possibleDirections.pop(possibleDirections.index(UP))
    #
    # if oldDirection == LEFT and RIGHT in possibleDirections:
    #     possibleDirections.pop(possibleDirections.index(RIGHT))
    #
    # if oldDirection == RIGHT and LEFT in possibleDirections:
    #     possibleDirections.pop(possibleDirections.index(LEFT))

    return possibleDirections[random.randrange(len(possibleDirections))]


def runSecondWorm(wormCoords=[], direction=''):
    newHead = {}
    if direction == UP:
        newHead = {'x': wormCoords[HEAD]['x'], 'y': wormCoords[HEAD]['y'] - 1}
    elif direction == DOWN:
        newHead = {'x': wormCoords[HEAD]['x'], 'y': wormCoords[HEAD]['y'] + 1}
    elif direction == LEFT:
        newHead = {'x': wormCoords[HEAD]['x'] - 1, 'y': wormCoords[HEAD]['y']}
    elif direction == RIGHT:
        newHead = {'x': wormCoords[HEAD]['x'] + 1, 'y': wormCoords[HEAD]['y']}
    wormCoords.insert(0, newHead)
    del wormCoords[-1]


def drawGame(wormCoords, apple, flashyApples=[], score=0, wormCoordsSecond=[]):
    DISPLAYSURF.fill(BGCOLOR)
    drawGrid()
    drawWorm(wormCoords)
    drawSecondWorm(wormCoordsSecond)
    drawApple(apple)
    drawScore(score)
    drawFlashyApples(flashyApples)
    pygame.display.update()


def drawPressKeyMsg():
    pressKeySurf = BASICFONT.render('Press a key to play.', True, DARKGRAY)
    pressKeyRect = pressKeySurf.get_rect()
    pressKeyRect.topleft = (WINDOWWIDTH - 200, WINDOWHEIGHT - 30)
    DISPLAYSURF.blit(pressKeySurf, pressKeyRect)


def checkForKeyPress():
    if len(pygame.event.get(QUIT)) > 0:
        terminate()

    keyUpEvents = pygame.event.get(KEYUP)
    if len(keyUpEvents) == 0:
        return None
    if keyUpEvents[0].key == K_ESCAPE:
        terminate()
    return keyUpEvents[0].key


def showStartScreen():
    titleFont = pygame.font.Font('freesansbold.ttf', 100)
    titleSurf1 = titleFont.render('Wormy!', True, WHITE, DARKGREEN)
    titleSurf2 = titleFont.render('Wormy!', True, GREEN)

    degrees1 = 0
    degrees2 = 0
    while True:
        DISPLAYSURF.fill(BGCOLOR)
        rotatedSurf1 = pygame.transform.rotate(titleSurf1, degrees1)
        rotatedRect1 = rotatedSurf1.get_rect()
        rotatedRect1.center = (WINDOWWIDTH / 2, WINDOWHEIGHT / 2)
        DISPLAYSURF.blit(rotatedSurf1, rotatedRect1)

        rotatedSurf2 = pygame.transform.rotate(titleSurf2, degrees2)
        rotatedRect2 = rotatedSurf2.get_rect()
        rotatedRect2.center = (WINDOWWIDTH / 2, WINDOWHEIGHT / 2)
        DISPLAYSURF.blit(rotatedSurf2, rotatedRect2)

        drawPressKeyMsg()

        if checkForKeyPress():
            pygame.event.get()  # clear event queue
            return
        pygame.display.update()
        FPSCLOCK.tick(FPS)
        degrees1 += 3  # rotate by 3 degrees each frame
        degrees2 += 7  # rotate by 7 degrees each frame


def terminate():
    pygame.quit()
    sys.exit()


def getRandomLocation():
    return {'x': random.randint(0, CELLWIDTH - 1), 'y': random.randint(0, CELLHEIGHT - 1)}


def getFlashyApples():
    flashyApples = []
    for i in range(3):
        flashyApples.append({
            'x': random.randint(0, CELLWIDTH - 1),
            'y': random.randint(0, CELLHEIGHT - 1)
        })
    return flashyApples


def checkFlashyApple(snake=[], apples=[]):
    for apple in apples:
        if snake[HEAD]['x'] == apple['x'] and snake[HEAD]['y'] == apple['y']:
            apples.pop(apples.index(apple))
            return True


def showGameOverScreen():
    gameOverFont = pygame.font.Font('freesansbold.ttf', 150)
    gameSurf = gameOverFont.render('Game', True, WHITE)
    overSurf = gameOverFont.render('Over', True, WHITE)
    gameRect = gameSurf.get_rect()
    overRect = overSurf.get_rect()
    gameRect.midtop = (WINDOWWIDTH / 2, 10)
    overRect.midtop = (WINDOWWIDTH / 2, gameRect.height + 10 + 25)

    DISPLAYSURF.blit(gameSurf, gameRect)
    DISPLAYSURF.blit(overSurf, overRect)
    drawPressKeyMsg()
    pygame.display.update()
    pygame.time.wait(500)
    checkForKeyPress()  # clear out any key presses in the event queue

    while True:
        if checkForKeyPress():
            pygame.event.get()  # clear event queue
            return


def drawScore(score):
    scoreSurf = BASICFONT.render('Score: %s' % (score), True, WHITE)
    scoreRect = scoreSurf.get_rect()
    scoreRect.topleft = (WINDOWWIDTH - 120, 10)
    DISPLAYSURF.blit(scoreSurf, scoreRect)


def drawWorm(wormCoords):
    for coord in wormCoords:
        x = coord['x'] * CELLSIZE
        y = coord['y'] * CELLSIZE
        wormSegmentRect = pygame.Rect(x, y, CELLSIZE, CELLSIZE)
        pygame.draw.rect(DISPLAYSURF, DARKGREEN, wormSegmentRect)
        wormInnerSegmentRect = pygame.Rect(x + 4, y + 4, CELLSIZE - 8, CELLSIZE - 8)
        pygame.draw.rect(DISPLAYSURF, GREEN, wormInnerSegmentRect)


def drawSecondWorm(wormCoords):
    for coord in wormCoords:
        x = coord['x'] * CELLSIZE
        y = coord['y'] * CELLSIZE
        wormSegmentRect = pygame.Rect(x, y, CELLSIZE, CELLSIZE)
        pygame.draw.rect(DISPLAYSURF, DARKBLUE, wormSegmentRect)
        wormInnerSegmentRect = pygame.Rect(x + 4, y + 4, CELLSIZE - 8, CELLSIZE - 8)
        pygame.draw.rect(DISPLAYSURF, BLUE, wormInnerSegmentRect)


def drawApple(coord):
    x = coord['x'] * CELLSIZE
    y = coord['y'] * CELLSIZE
    appleRect = pygame.Rect(x, y, CELLSIZE, CELLSIZE)
    pygame.draw.rect(DISPLAYSURF, RED, appleRect)


def drawFlashyApples(coords):
    for coord in coords:
        x = coord['x'] * CELLSIZE
        y = coord['y'] * CELLSIZE
        flashyAppleRect = pygame.Rect(x, y, CELLSIZE, CELLSIZE)

        if int(time.time() * 10 % 10) % 2 == 0:
            color = RED_DARK
        else:
            color = RED_FLASH

        pygame.draw.rect(DISPLAYSURF, color, flashyAppleRect)


def drawGrid():
    for x in range(0, WINDOWWIDTH, CELLSIZE):  # draw vertical lines
        pygame.draw.line(DISPLAYSURF, DARKGRAY, (x, 0), (x, WINDOWHEIGHT))
    for y in range(0, WINDOWHEIGHT, CELLSIZE):  # draw horizontal lines
        pygame.draw.line(DISPLAYSURF, DARKGRAY, (0, y), (WINDOWWIDTH, y))


if __name__ == '__main__':
    main()