import pygame 
import sys 
from pygame.locals import * 

pygame.init()
vec = pygame.math.Vector2

Height = 450 
Width = 400 
Acc = 0.5 
Fric = -0.12 
FPS = 60

FramesPerSec = pygame.time.Clock() 

displaysurface = pygame.display.set_mode((Width, Height))
pygame.display.set_caption("Platformer skibidi") 

class Player(pygame.sprite.Sprite): 
    def __init__(self): 
       super().__init__()
       self.surf = pygame.Surface((30, 30)) 
       self.surf.fill((128,255,40)) 
       self.rect = self.surf.get_rect(center = (10, 420)) 

       self.pos = vec((10, 385))
       self.vel = vec(0,0)
       self.acc = vec(0,0)

    def move(self): 
        self.acc = vec(0,0.5)

        pressed_keys = pygame.key.get_pressed() 
        
        if pressed_keys[K_LEFT]: 
            self.acc.x = -Acc
        if pressed_keys[K_RIGHT]: 
            self.acc.x = Acc 
        
        self.acc.x += self.vel.x * Fric 
        self.vel += self.acc 
        self.pos += self.vel + 0.5 * self.acc 

        if self.pos.x > Width: 
            self.pos.x = 0 
        if self.pos.x < 0: 
            self.pos.x = Width 

        self.rect.midbottom = self.pos 

    def update(self): 
        hits = pygame.sprite.spritecollide(P1 , platforms, False )
        if hits: 
            self.pos.y = hits[0].rect.top + 1
            self.vel.y = 0

class platform(pygame.sprite.Sprite): 
    def __init__(self): 
        super().__init__() 
        self.surf = pygame.Surface((Width, 20)) 
        self.surf.fill((255,0,0)) 
        self.rect = self.surf.get_rect(center = (Width/2, Height)) 

PT1 = platform()
P1 = Player() 

all_sprites = pygame.sprite.Group() 
all_sprites.add(PT1)
all_sprites.add(P1)

platforms = pygame.sprite.Group()
platforms.add(PT1)

while True: 
    for event in pygame.event.get(): 
        if event.type == QUIT: 
            pygame.quit()
            sys.exit()

        displaysurface.fill((0,0,0))

    P1.move() 
    P1.update()
    for entity in all_sprites: 
        displaysurface.blit(entity.surf, entity.rect) 

    pygame.display.update()
    FramesPerSec.tick(FPS)