import tkinter as tk
from PIL import Image,ImageTk
import random
import threading
import time
from world import World
import sys

RENDER_WIDTH, RENDER_HEIGHT = 640 // 32 + 1, 480 // 32 + 1
FPS = 20

class Camera:
    def __init__(self, x: int, y: int):
        self.x: int = x
        self.y: int = y

class Renderer:
    def key_press(self, event: tk.Event):
        if event.keysym == "Escape":
            self.running = False
        self.keys[event.keysym] = True
        
    def key_release(self, event: tk.Event):
        if event.keysym in self.keys:
            self.keys[event.keysym] = False

    def is_down(self, key):
        if not (key in self.keys):
            return 0
        
        return 1 if self.keys[key] else 0

    def render(self):
        offset_x, offset_y = self.camera.x % 32, self.camera.y % 32
        index = 0
        self.world.update_chunks(self.camera.x // 32, self.camera.y // 32)
        for tile in self.tiles:
            self.canvas.moveto(tile, 32 * (index % RENDER_WIDTH)- offset_x, 32 * (index // RENDER_WIDTH) - offset_y)
            self.canvas.itemconfig(tile, image=self.sprites[self.world.get_block(
                self.camera.x // 32 + index % RENDER_WIDTH,
                self.camera.y // 32 + index // RENDER_WIDTH
            ).id])
            index += 1

    def update(self):
        move_x = self.is_down("Right") - self.is_down("Left")
        move_y = self.is_down("Down") - self.is_down("Up")
        self.camera.x += move_x * 10
        self.camera.y += move_y * 10

    def update_thread(self):
        while self.running:
            self.update()
            self.render()
            time.sleep(1 / FPS)

    def __init__(self):
        self.running = True
        self.window = tk.Tk()
        self.window.title("MC 2D")
        self.window.geometry("640x480")

        self.camera = Camera(90 * 32, 90 * 32)
        self.world = World(self.camera.x // 32, self.camera.y // 32)

        self.keys = {}

        self.sprites = [
            "sprites/air.png",
            "sprites/stone.png",
            "sprites/dirt.png",
            "sprites/grass.png",
            "sprites/coal.png",
            "sprites/iron.png",
            "sprites/gold.png",
            "sprites/diamond.png",
            "sprites/log.png",
            "sprites/leaf.png",
        ]

        self.sprites = [
            ImageTk.PhotoImage(Image.open(sprite)) for sprite in self.sprites
        ]

        self.canvas = tk.Canvas(self.window, width=640, height=480, background="white")
        self.canvas.pack()

        self.tiles = [
            self.canvas.create_image(32 * (i % RENDER_WIDTH) - 16, 32 * (i // RENDER_WIDTH) - 16, anchor="nw", image=self.sprites[random.randint(0, len(self.sprites) - 1)])
            for i in range(RENDER_WIDTH * RENDER_HEIGHT)
        ]

        self.tupdate = threading.Thread(target=self.update_thread)
        self.tupdate.start()

        self.window.bind("<Key>", self.key_press)
        self.window.bind("<KeyRelease>", self.key_release)

        self.window.mainloop()
        self.running = False