#!/usr/bin/python3
import pygame
from random import randint
pygame.init()
## funktionen
def get_debug_text():
    def text(text,line_counter):
        debug_text = default_font.render(str(text), True, (0,0,0))
        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
## klassen
class Player():
    def __init__(self):
        self.pos = 80,0
        self.gravity = 0.7
        self.gravityspeed = 0
        self.jumping = False

    def move(self):
        self.gravityspeed += self.gravity
        x,y = self.pos
        y += self.gravityspeed
        if y > boden:
            y =boden
            self.jumping = False
        else:
            self.jumping = True
        self.pos = x,y
    def jump(self):
        if not self.jumping:
            self.gravityspeed = -14

    def render(self):
        pygame.draw.rect(screen,(0,255,0),(self.pos[0]-50,
                                           self.pos[1]-60,
                                           50,
                                           60))

class Kaktus():
    def __init__(self):
        self.pos = screensize[0],boden
    def move(self,steps):
        x,y = self.pos
        x -= steps
        self.pos = x,y
    def render(self):
        pygame.draw.rect(screen,(255,0,0),(self.pos[0]-50,
                                           self.pos[1]-60,
                                           50,
                                           60))

## variablen
screen = pygame.display.set_mode((800,500),pygame.RESIZABLE)
pygame.display.set_caption("FLAPPY BIRD")
screensize = pygame.display.get_window_size()
clock = pygame.time.Clock()
default_font = pygame.font.SysFont("sans", 14)
boden = (screensize[1]//3)*2

player = Player()
Kaktuse = []
kaktus_ticker = 0
next_kaktus = randint(100,500)
for a in range(3):
    Kaktuse.append(Kaktus())
kaktusspeed = 5
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_d] and not preview_pressed_keys[pygame.K_d]:
           show_debug = not show_debug
        if pressed_keys[pygame.K_SPACE] and not preview_pressed_keys[pygame.K_SPACE]:
            player.jump()

        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()

        pygame.draw.line(screen,(0,0,0),(0,boden),(screensize[0],boden))
        player.move()
        player.render()
        for a in Kaktuse:
            a.move(kaktusspeed)
            a.render()
            if a.pos[0] < 0:
                Kaktuse.pop(0)
        if kaktus_ticker > next_kaktus:
            next_kaktus = randint(80,180)
            kaktus_ticker =0
            Kaktuse.append(Kaktus())
        kaktus_ticker += kaktusspeed*0.3
        if show_debug:
            get_debug_text()
        ## bildschirm aktuallisierung
        pygame.display.flip()
        clock.tick(60)
        screen.fill((255,255,255))