import pygame
from settings import *

from world import World
from player import Player
from camera import Camera
from inventory import Inventory
from enemy_manager import EnemyManager


class Game:
    def __init__(self):
        pygame.init()  # <-- IMPORTANT

        self.show_inventory = False

        # ----------------------------------
        # Display Setup
        # ----------------------------------
        flags = pygame.SCALED
        self.screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT), flags)
        pygame.display.set_caption(GAME_TITLE)

        self.clock = pygame.time.Clock()
        self.running = True
        self.paused = False

        # ----------------------------------
        # Core Systems
        # ----------------------------------
        self.world = World()
        self.player = Player(100, 100)
        self.camera = Camera(self.player)
        self.inventory = Inventory()
        self.enemy_manager = EnemyManager(self.world, self.player)

        # ----------------------------------
        # Debug
        self.font = pygame.font.SysFont("consolas", 18)

    # ==========================================================
    # MAIN LOOP
    # ==========================================================
    def run(self):
        while self.running:
            dt = self.clock.tick(FPS) / 1000

            self.handle_events()

            if not self.paused:
                self.update(dt)

            self.draw()

        pygame.quit()

    # ==========================================================
    # EVENTS
    # ==========================================================
    def handle_events(self):
        for event in pygame.event.get():

            if event.type == pygame.QUIT:
                self.running = False

            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_ESCAPE:
                    self.paused = not self.paused

                # Toggle inventory
                if event.key == pygame.K_i:
                    self.show_inventory = not self.show_inventory

            # -------------------------------
            # Mouse input for breaking/placing
            # -------------------------------
            if event.type == pygame.MOUSEBUTTONDOWN:
                if event.button == 1:  # Left click
                    self.world.break_block(
                        pygame.mouse.get_pos(),
                        self.camera,
                        self.inventory
                    )

                if event.button == 3:  # Right click
                    self.world.place_block(
                        pygame.mouse.get_pos(),
                        self.camera
                    )

    # ==========================================================
    # UPDATE
    # ==========================================================
    def update(self, dt):
        # If inventory is open, pause gameplay
        if self.show_inventory:
            return

        self.player.update(dt, self.world)
        self.camera.update()
        self.enemy_manager.update(dt)

    # ==========================================================
    # DRAW
    # ==========================================================
    def draw(self):
        self.screen.fill(BACKGROUND_COLOR)

        # Draw world relative to camera
        self.world.draw(self.screen, self.camera)

        # Draw entities
        self.enemy_manager.draw(self.screen, self.camera)
        self.player.draw(self.screen, self.camera)

        # UI
        if self.show_inventory:
            self.inventory.draw(self.screen)

        self.draw_ui()
        pygame.display.flip()

    # ==========================================================
    # UI / DEBUG
    # ==========================================================
    def draw_ui(self):
        if SHOW_FPS:
            fps = self.clock.get_fps()
            fps_text = self.font.render(f"FPS: {int(fps)}", True, (255, 255, 255))
            self.screen.blit(fps_text, (10, 10))

        if DEBUG_MODE:
            debug_text = self.font.render(
                f"Player: ({int(self.player.rect.x)}, {int(self.player.rect.y)})",
                True,
                (255, 255, 255)
            )
            self.screen.blit(debug_text, (10, 30))

        if self.paused:
            pause_text = self.font.render("PAUSED", True, (255, 0, 0))
            rect = pause_text.get_rect(center=(SCREEN_WIDTH // 2, SCREEN_HEIGHT // 2))
            self.screen.blit(pause_text, rect)