import pygame.image
import random

from common.constants import GRID_CELL_SIZE


def load_knight_textures():
    random_index = random.randint(1, 4)
    states = [
        pygame.image.load(f'resources/textures/knight_{random_index}_up.png').convert_alpha(),  # up = 0
        pygame.image.load(f'resources/textures/knight_{random_index}_right.png').convert_alpha(),  # right = 1
        pygame.image.load(f'resources/textures/knight_{random_index}_down.png').convert_alpha(),  # down = 2
        pygame.image.load(f'resources/textures/knight_{random_index}_left.png').convert_alpha(),  # left = 3
    ]
    return states


class Knight(pygame.sprite.Sprite):

    def __init__(self, position, group):
        super().__init__(group)

        self.direction = 2
        self.states = load_knight_textures()

        self.image = self.states[self.direction]
        self.rect = self.image.get_rect(topleft=position)

        self.health = random.randint(7, 12)
        self.attack = random.randint(4, 7)
        self.defense = random.randint(1, 4)
        self.points = 1

    # direction arg = -1 to rotate left
    # direction arg = 1 to rotate right
    def rotate(self, direction):
        self.direction = (self.direction + direction) % 4
        self.image = self.states[self.direction]

    def step_forward(self):
        if self.direction == 0:
            self.rect.y = self.rect.y - GRID_CELL_SIZE
        elif self.direction == 1:
            self.rect.x = self.rect.x + GRID_CELL_SIZE
        elif self.direction == 2:
            self.rect.y = self.rect.y + GRID_CELL_SIZE
        else:
            self.rect.x = self.rect.x - GRID_CELL_SIZE