import pygame
from common.constants import BAR_ANIMATION_SPEED, GRID_CELL_SIZE
from common.colors import FONT_DARK, ORANGE, WHITE, RED, GREEN, BLACK


class HealthBar:
    def __init__(self, screen, rect, current_hp, max_hp, x=None, y=None, width=None, height=None):
        self.rect = rect
        self.screen = screen
        self.current_hp = current_hp
        self.target_hp = current_hp
        self.max_hp = max_hp
        self.width = width
        self.height = height
        self.x = x
        self.y = y

        if self.width is None:
            self.width = int(GRID_CELL_SIZE * 0.9)
        if self.height is None:
            self.height = int(GRID_CELL_SIZE * 0.05)

        self.health_ratio = self.max_hp/self.width

        if self.x is None:
            self.x = int(GRID_CELL_SIZE * 0.1) + self.rect.x
        if self.y is None:
            self.y = int(GRID_CELL_SIZE/2) + self.rect.y

    def update(self):
        self.show()

    def take_dmg(self, dmg_taken):
        if self.target_hp > 0:
            self.target_hp -= dmg_taken
        elif self.target_hp < 0:
            self.target_hp = 0

    def heal(self, amount):
        if self.target_hp < self.max_hp:
            self.target_hp += amount
        elif self.target_hp > self.max_hp:
            self.target_hp = self.max_hp

    def show(self):
        pygame.Surface.fill(self.screen, BLACK, (self.x-1, self.y-1, self.width+2, self.height+2))
        pygame.Surface.fill(self.screen, RED, (self.x, self.y, self.width, self.height))
        pygame.Surface.fill(self.screen, GREEN, (self.x, self.y, int(self.target_hp * self.health_ratio)-1, self.height))