import pygame as pg
from game.util import *
import math

class Tower(pg.sprite.Sprite):
    def __init__(self, game, pos, tile_pos, type, range, level=1):
        super().__init__()
        self.game = game
        self.type = type
        self.image = self.game.assets[type]
        self.rect = self.image.get_rect()
        self.rect.center = pos

        self.range = range
        self.selected = False
        self.angle = 0
        self.target = None

        self.fire_rate = 180      # frames between shots — tune to taste
        self.fire_cooldown = 0
        self.damage = 50

        self.pos = pos
        self.tile_pos = tile_pos
        self.level = level
        self.action = ""
        self.set_action('shoot')

    def update(self, enemy_group):
        self.animation.update()
        self.pick_target(enemy_group)
        self.rotate()

        if self.fire_cooldown > 0:
            self.fire_cooldown -= 1

        if self.target is not None and self.fire_cooldown == 0:
            print("shoot fired")
            self.shoot()

    def set_action(self, action):
        if action != self.action:
            self.action = action
            self.animation = self.game.assets[self.type + '/' + self.action].copy()

    def render(self, surf, camera):    
        screen_pos = camera.world_to_screen(pg.Vector2(
            tile_to_pixel(self.tile_pos, self.game.tilemap.tile_size, True)
        ))

        anim_img = self.animation.img()
        rotated_img = pg.transform.rotate(anim_img, self.angle)
        scaled_image = pg.transform.scale(
          rotated_img,
            (
                int(rotated_img.get_width() * camera.zoom),
                int(rotated_img.get_height() * camera.zoom)
            )
        )

        self.rect = scaled_image.get_rect(center=screen_pos)

        if self.selected:
            scaled_range = int(self.range * camera.zoom)
            range_surf = pg.Surface((scaled_range * 2, scaled_range * 2), pg.SRCALPHA)
            pg.draw.circle(range_surf, (200, 200, 200, 100), (scaled_range, scaled_range), scaled_range)
            range_rect = range_surf.get_rect(center=screen_pos)
            surf.blit(range_surf, range_rect)

        surf.blit(scaled_image, self.rect)
    
    def rotate(self):
        if self.target is None:
            # print("no target")
            return  # keep last angle, or reset to a default — your call

        tower_world_pos = pg.Vector2(
            tile_to_pixel(self.tile_pos, self.game.tilemap.tile_size, True)
        )
        direction = self.target.pos - tower_world_pos
        self.angle = math.degrees(math.atan2(-direction[1], direction[0])) -90
        # print(f"angle {self.angle}")
        
    def pick_target(self, enemy_group):
        closest = None
        closest_dist = float('inf')

        tower_world_pos = pg.Vector2(
            tile_to_pixel(self.tile_pos, self.game.tilemap.tile_size, True)
        )

        for enemy in enemy_group:
            distance = tower_world_pos.distance_to(enemy.pos)
            if distance <= self.range and distance < closest_dist:
                closest = enemy
                closest_dist = distance

        self.target = closest  # explicitly None if nothing in range
    
    def shoot(self):
        self.target.take_damage(self.damage)
        self.animation.play_animation()
        self.fire_cooldown = self.fire_rate

class TowerGroup(pg.sprite.Group):
    def render(self, surf, camera):
        for tower in self.sprites():
            tower.render(surf, camera)
    
    def update(self, enemies):
        for tower in self.sprites():
            tower.update(enemies)