#!/usr/bin/python3
import pygame
import pygame.gfxdraw
import copy
import random
pygame.init()
## funktionen
def get_debug_text():
    def text(text,line_counter):
        debug_text = default_font.render(str(text), True, (255,255,255))
        screen.blit(debug_text,(0,line_counter*default_font.get_height()))

    line_counter = 1
    globalvars = globals()
    for a in globalvars:
        text(f"{str(a)} = {str(globalvars[a])}",line_counter)
        line_counter += 1

def centered_text(text=str,pos=tuple,color=tuple):
    text = default_font.render(str(text), True, color,(255,255,255))
    screen.blit(text,(pos[0]-text.get_width()/2,pos[1]))

def draw_feld(feld,color_key,block_size):
    #print(feld)
    for a in range(len(feld[0])):
        for b in range(len(feld)):
            if feld[b][a] != " ":
                pygame.draw.rect(screen,color_key[feld[b][a]],
                                 (a*block_size[0],
                                  b*block_size[1],
                                  (block_size[0]),
                                  (block_size[1])))
def get_block_size():
    return 20,20
def get_meightboars(feld,position):
    nachtbaren = []
    return nachtbaren
def save_list(liste,index1,index2):
    if index2 > len(liste[0]) and index1 > len(liste):
        return liste[index1][index2]
    else:
        return "a"
def verarbeite_feld(feld):
    feld2 = copy.deepcopy(feld)
    for y in range(len(feld)):
        for x in range(len(feld[0])):
            poschar = feld[y][x]
            if poschar == "a":
                # uberprüfe unteren block
                bellow = feld[(y+1)%feldy][x]
                bellowr = feld2[(y+1)%feldy][(x+1)%feldx]
                bellowl = feld2[(y+1)%feldy][(x-1)%feldx]
                direction = random.choice([-1, 1])  # Zufällige Auswahl der Richtung

                if bellow == " " and not bellow == "#":
                    feld2[y][x] = feld[(y+1)%feldy][x]
                    feld2[(y+1)%feldy][x] = feld[y][x]

                elif bellowr == " " and not bellow == "#":
                    feld2[y][x] = feld[(y+1)%feldy][(x+direction)%feldx]
                    feld2[(y+1)%feldy][(x+direction)%feldx] = feld[y][x]
                        
                elif bellowl == " " and not bellow == "#":
                    feld2[y][x] = feld[(y+1)%feldy][(x+direction)%feldx]
                    feld2[(y+1)%feldy][(x+direction)%feldx] = feld[y][x]
    return feld2

def make_feld(size,mode):
    x = screensize[0]//size
    y = screensize[1]//size
    feld = [[" " for _ in range(x)] for _ in range(y)]
    if mode == "border":
        for x in range(x):
            feld[y-1][x] = "#"
    return feld ,x,y
## klassen

        
## variablen
screen = pygame.display.set_mode((800,500),pygame.RESIZABLE)
pygame.display.set_caption("SAND")
screensize = pygame.display.get_window_size()
clock = pygame.time.Clock()
default_font = pygame.font.SysFont("sans", 14)

display_mode = "border"
feld,feldx,feldy = make_feld(20,display_mode)

acolor = (255,0,0)
wechselfarbe = "r"
using_element = "a"
pixelsize = 20


show_debug = False
running = True
if __name__ == "__main__":
    while running:
        ## key managment
        pressed_keys = pygame.key.get_pressed()

        if pressed_keys[pygame.K_ESCAPE]:
            exit()
        if pressed_keys[pygame.K_PLUS] and not preview_pressed_keys[pygame.K_PLUS]:
            pixelsize += 2
        if pressed_keys[pygame.K_MINUS] and not preview_pressed_keys[pygame.K_MINUS]:
            pixelsize -= 2
        if pressed_keys[pygame.K_d] and not preview_pressed_keys[pygame.K_d]:
            show_debug = not show_debug
        if pressed_keys[pygame.K_RETURN] and not preview_pressed_keys[pygame.K_RETURN]:
            if using_element == "a":
                using_element = "#"
            else:
                using_element = "a"
        if pressed_keys[pygame.K_r] and not preview_pressed_keys[pygame.K_r]:
            feld,feldx,feldy = make_feld(pixelsize,display_mode)
            print("reset")

        preview_pressed_keys = pressed_keys
        ## event managment
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                exit()
            if event.type == pygame.WINDOWRESIZED:
                screensize = pygame.display.get_window_size()
                feld,feldx,feldy = make_feld(pixelsize,display_mode)
        r,g,b = acolor
        if wechselfarbe == "r":
            r -= 1
            g += 1
            if r == 0:
                wechselfarbe = "g"
        if wechselfarbe == "g":
            g -= 1
            b += 1
            if g == 0:
                wechselfarbe = "b"
        if wechselfarbe == "b":
            b -= 1
            r += 1
            if b == 0:
                wechselfarbe = "r"
        acolor = r,g,b
        color_key = {"#":(100,100,100),
                     "a":acolor}
        draw_feld(feld,color_key,(pixelsize,pixelsize))
        mx,my = pygame.mouse.get_pos()
        mousepressed = pygame.mouse.get_pressed()[0]
        if mousepressed :
            feld[my//pixelsize][mx//pixelsize] = using_element
        
        preview_mousepressed = pygame.mouse.get_pressed()[0]
        feld = verarbeite_feld(feld)

        if show_debug:
            get_debug_text()
        ## bildschirm aktuallisierung
        pygame.display.flip()
        clock.tick(30)
        screen.fill((0,0,0))