from settings import *

class Camera:
    def __init__(self,width,height):
        self.camera = pg.Rect(0,0, width, height)
        self.width = width
        self.height = height

    def apply(self,entity):
        return entity.rect.move(self.camera.topleft)

    def apply_rect(self, rect):
         return rect.move(self.camera.topleft)
    
    def update(self,target):
        x = -target.rect.x + int(WIDTH/2)
        y = -target.rect.y + int(HEIGHT / 2)

        # limit scrolling to map size
        x = min(0, x)  # left
        y = min(0, y)  # top
        x = max(-(self.width - WIDTH), x)  # right
        y = max(-(self.height - HEIGHT), y)  # bottom
        self.camera = pg.Rect(x, y, self.width, self.height)