import pygame
from random import randint, choice

pygame.init() #inicjalizacja modułu

#Tworzenie okna
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600

screen_surface = pygame.display.set_mode( (SCREEN_WIDTH,SCREEN_HEIGHT) )
pygame.display.set_caption("Pierwsza Gra") #nazwa okienka

#Utworzenie zegra do nadzoru FPS
clock = pygame.time.Clock()

bonus_images = [ "bonus_1.png", "bonus_2.png", "bonus_3.png" ]

##### FUNKCJE ############

def load_image(img_path :str, position):
    image = pygame.image.load(img_path)
    surface = image.convert()
    transparent_color = (0,0,0) #kolor czarny rgb
    surface.set_colorkey(transparent_color)
    rect = surface.get_rect(center = position)

    return [image,surface,rect]

def print_image(img_list):
    image,surface,rect = img_list
    screen_surface.blit(surface,rect)

def set_position_image(img_list, position):
    image,surface,rect = img_list
    rect = surface.get_rect(center=position)

    return [image,surface,rect]

def calculate_player_movement(keys):
    #poruszanie postacią
    speed = 10
    delta_x = 0
    delta_y = 0

    if keys[pygame.K_LSHIFT]:
        speed *= 2

    if keys[pygame.K_w]:
        delta_y -= speed
    if keys[pygame.K_s]:
        delta_y += speed
    if keys[pygame.K_a]:
        delta_x -= speed
    if keys[pygame.K_d]:
        delta_x += speed
    
    return [delta_x, delta_y]

def limit_position(position):
    x,y = position
    x = max( 0, min(x,SCREEN_WIDTH))
    y = max( 0, min(y,SCREEN_HEIGHT))

    return [x,y]

def generate_bonus_object():
    image_name = choice(bonus_images)
    x = randint(0,SCREEN_WIDTH)
    y = randint(0,SCREEN_HEIGHT)
    position = [x,y]
    new_obj = load_image(image_name,position)

    return new_obj

def print_bonus_objects(bonus_objects):
    for obj in bonus_objects:
        print_image(obj)


##########################################################################################

player_pos = [SCREEN_WIDTH/2, SCREEN_HEIGHT/2]
player = load_image('player.png',player_pos)
bonus_objects = []

game_status = True

while game_status:
    #odczytywanie zdarzeń
    events = pygame.event.get()

    for event in events:
        #print(event)
        if event.type == pygame.QUIT:
            game_status = False

    #Bonusy
    !bonus_objects.append(generate_bonus_object())
    

    #interpretacja klawiszy i obliczanie pozycji
    pressed_keys = pygame.key.get_pressed() # K_x - klawisz x
    delta_x, delta_y = calculate_player_movement(pressed_keys)
    player_pos[0] += delta_x
    player_pos[1] += delta_y
    player_pos = limit_position(player_pos)

    #ustawianie pozycji gracza
    player = set_position_image(player,player_pos)

    #uzupełnij tło
    screen_surface.fill([0,0,0])
    #wyświetl gracza  
    print_image(player)

    #wyświetl Bonusy
    !print_bonus_objects(bonus_objects)


    pygame.display.update()
    clock.tick(60)
    pass

pygame.quit()
quit()