import os
import subprocess
import threading
import time
import customtkinter as ctk
import minecraft_launcher_lib
from tkinter import messagebox
from PIL import Image, ImageTk, ImageFilter

# --------------------------------
# Setup paths
# --------------------------------
CUSTOM_DIR = os.path.join(os.getcwd(), "blockbreak")
os.makedirs(CUSTOM_DIR, exist_ok=True)

BG_PATH = os.path.join(os.getcwd(), "bg.png")

# --------------------------------
# GUI Setup
# --------------------------------
ctk.set_appearance_mode("dark")
ctk.set_default_color_theme("dark-blue")

root = ctk.CTk()
root.title("BlockBreak")
root.geometry("800x600")
root.minsize(600, 450)

# --------------------------------
# Background Canvas
# --------------------------------
bg_canvas = ctk.CTkCanvas(root, width=800, height=600, highlightthickness=0)
bg_canvas.pack(fill="both", expand=True)

bg_image = None

def reload_bg():
    global bg_image
    if not os.path.exists(BG_PATH):
        return
    pil_img = Image.open(BG_PATH).convert("RGB")

    w = root.winfo_width()
    h = root.winfo_height()

    pil_img = pil_img.resize((w, h))
    pil_img = pil_img.filter(ImageFilter.GaussianBlur(5))

    bg_image = ImageTk.PhotoImage(pil_img)
    bg_canvas.delete("bg")
    bg_canvas.create_image(0, 0, anchor="nw", image=bg_image, tags="bg")

root.bind("<Configure>", lambda e: reload_bg())

# --------------------------------
# Fade-in loading overlay
# --------------------------------
loading_overlay = ctk.CTkFrame(root, fg_color="#000000")
loading_overlay.place(relx=0, rely=0, relwidth=1, relheight=1)

loading_label = ctk.CTkLabel(
    loading_overlay, text="Loading...", font=("Arial", 36)
)
loading_label.place(relx=0.5, rely=0.5, anchor="center")

# --------------------------------
# Main Panel UI
# --------------------------------
panel = ctk.CTkFrame(root, corner_radius=25, width=600, height=500, fg_color="#1f1f1f")
panel.place(relx=0.5, rely=0.5, anchor="center")

inner_panel = ctk.CTkFrame(panel, fg_color="transparent")
inner_panel.pack(padx=30, pady=30, fill="both", expand=True)

ctk.CTkLabel(inner_panel, text="BlockBreak", font=("Arial", 28)).pack(pady=(0, 20))

username_entry = ctk.CTkEntry(inner_panel, placeholder_text="Username", width=500)
username_entry.pack(pady=10)

version_var = ctk.StringVar()
version_dropdown = ctk.CTkComboBox(inner_panel, values=[], variable=version_var, width=500)
version_dropdown.pack(pady=10)

progress = ctk.CTkProgressBar(inner_panel, width=500)
progress.set(0)
progress.pack(pady=10)

log_box = ctk.CTkTextbox(inner_panel, width=500, height=140)
log_box.pack(pady=10)
log_box.configure(state="disabled")

def log(text):
    log_box.configure(state="normal")
    log_box.insert("end", text + "\n")
    log_box.see("end")
    log_box.configure(state="disabled")

# --------------------------------
# Version handling
# --------------------------------
def get_versions():
    try:
        versions = minecraft_launcher_lib.utils.get_available_versions(CUSTOM_DIR)
    except:
        versions = []

    result = []
    for v in versions:
        vid = v["id"]
        installed = os.path.exists(os.path.join(CUSTOM_DIR, "versions", vid))
        label = f"{vid} [Installed]" if installed else vid
        result.append(label)
    return result

# --------------------------------
# Callback handler for minecraft-launcher-lib
# --------------------------------
max_steps = 1

def cb_set_status(status: str):
    log(f"[STATUS] {status}")

def cb_set_max(value: int):
    global max_steps
    max_steps = max(value, 1)
    progress.set(0)

def cb_set_progress(value: int):
    if max_steps != 0:
        progress.set(value / max_steps)

CALLBACKS = {
    "setStatus": cb_set_status,
    "setProgress": cb_set_progress,
    "setMax": cb_set_max
}

# --------------------------------
# Download + Launch Minecraft
# --------------------------------
def download_and_launch(username, version):
    try:
        actual_version = version.replace(" [Installed]", "")

        version_path = os.path.join(CUSTOM_DIR, "versions", actual_version)

        # Install if needed
        if not os.path.exists(version_path):
            log(f"Installing Minecraft {actual_version}...")
            minecraft_launcher_lib.install.install_minecraft_version(
                actual_version,
                CUSTOM_DIR,
                callback=CALLBACKS
            )
            log("Installation complete.")
        else:
            log("Version already installed — skipping download.")

        log("Generating launch command...")

        opts = minecraft_launcher_lib.utils.generate_test_options()
        opts["username"] = username
        opts["token"] = ""
        opts["uuid"] = opts.get("uuid", "")

        cmd = minecraft_launcher_lib.command.get_minecraft_command(
            actual_version,
            CUSTOM_DIR,
            opts
        )

        log("Launching Minecraft...")
        subprocess.Popen(cmd, cwd=CUSTOM_DIR)

        log("Minecraft launched!")

    except Exception as e:
        messagebox.showerror("Error", str(e))
        log(f"ERROR: {str(e)}")
    finally:
        progress.set(0)

def start_launch():
    username = username_entry.get().strip()
    version = version_var.get().strip()

    if not username or not version:
        messagebox.showerror("Error", "Username and version required!")
        return

    threading.Thread(target=download_and_launch, args=(username, version), daemon=True).start()

play_button = ctk.CTkButton(
    inner_panel, text="Play", command=start_launch, width=500, height=50
)
play_button.pack(pady=10)

# --------------------------------
# Fade-in (restored properly)
# --------------------------------
def full_fade_in():
    reload_bg()
    version_dropdown.configure(values=get_versions())

    # Simulated fade-in by brightening overlay
    for i in range(0, 25):
        shade = 255 - int(i * (255 / 25))
        hexcol = f"{shade:02x}"
        loading_overlay.configure(fg_color="#" + hexcol * 3)
        time.sleep(0.015)

    loading_overlay.destroy()

threading.Thread(target=full_fade_in, daemon=True).start()

root.mainloop()