from typing import List, Dict, Tuple

import pygame





class InputCommands:

    def __init__(self):

        pass



    def generate_commands(self, events: List, game_state) -> List[Dict]:

        commands = []

        camera = getattr(game_state, 'camera', {})

        

        for event in events:

            command = self._process_event(event, camera)

            if command:

                commands.append(command)

                

        return commands



    def _process_event(self, event, camera: Dict) -> Dict:

        if event.type == pygame.MOUSEBUTTONDOWN:

            if event.button == 1:  # Left click

                world_x, world_y = self.screen_to_world(event.pos[0], event.pos[1], camera)

                return {'type': 'select', 'world_pos': (world_x, world_y)}

            elif event.button == 3:  # Right click

                world_x, world_y = self.screen_to_world(event.pos[0], event.pos[1], camera)

                return {'type': 'move', 'world_pos': (world_x, world_y)}

        

        elif event.type == pygame.KEYDOWN:

            if event.key == pygame.K_b:

                return {'type': 'build', 'building_type': 'barracks'}

            elif event.key == pygame.K_s:

                return {'type': 'build', 'building_type': 'supply_depot'}

            elif event.key == pygame.K_g:

                return {'type': 'gather'}

                

        return None



    def screen_to_world(self, x: int, y: int, camera: Dict) -> Tuple[float, float]:

        camera_x = camera.get('x', 0)

        camera_y = camera.get('y', 0)

        zoom = camera.get('zoom', 1.0)

        

        world_x = (x / zoom) + camera_x

        world_y = (y / zoom) + camera_y

        

        return world_x, world_y