import json
import os
import random
import string

import telebot

from call2api import create_account, delete_account

# Load configuration
CONFIG_FILE = "config.json"
if not os.path.exists(CONFIG_FILE):
    with open(CONFIG_FILE, "w") as f:
        f.write("""{
    "bot_token": "YOUR_BOT_TOKEN_HERE",
    "chat_id": 1111,
    "api_url": "http://localhost:8000",
    "api_token": "YOUR_API_TOKEN_HERE",
    "drive_quota": 100
}""")
    raise FileNotFoundError(f"Configuration file {CONFIG_FILE} not found")

with open(CONFIG_FILE, "r") as f:
    config = json.load(f)

# Bot configuration
BOT_TOKEN = config.get("bot_token")
CHAT_ID = config.get("chat_id", 1111)
API_URL = config.get("api_url")
API_TOKEN = config.get("api_token")
DRIVE_QUOTA = config.get("drive_quota", 100)

# Initialize bot
bot = telebot.TeleBot(BOT_TOKEN)


# Load user registrations
def load_registrations():
    if os.path.exists("registrations.json"):
        with open("registrations.json", "r") as f:
            return json.load(f)
    return {}


# Save user registrations
def save_registrations(registrations):
    with open("registrations.json", "w") as f:
        json.dump(registrations, f, indent=2)


# Generate random password
def generate_password(length=20):
    characters = string.ascii_letters + string.digits
    return "".join(random.choice(characters) for _ in range(length))


# Generate registration token
def generate_registration_token(length=20):
    characters = string.ascii_letters + string.digits
    return "".join(random.choice(characters) for _ in range(length))


# Store pending registrations
global pending_registrations
pending_registrations = {}


@bot.message_handler(commands=["reg_sfs"])
def register_user(message):
    user_id = str(message.from_user.id)
    chat_id = message.chat.id

    # Check if this is private messages
    if message.chat.type == "private":
        complete_registration(message)
        return
    # Check if command was sent in the correct chat
    if chat_id != CHAT_ID:
        bot.reply_to(message, "Please use this command in the designated chat.")
        return

    # Load current registrations
    registrations = load_registrations()

    # Check if user is already registered
    if user_id in registrations:
        bot.reply_to(message, "You are already registered!")
        return

    # Generate registration token and store it
    reg_token = generate_registration_token()
    global pending_registrations
    pending_registrations[user_id] = reg_token

    # Send instruction to user
    instruction_msg = (
        f"To complete registration, type in bot's private messages:\n"
        f"`/reg_sfs {reg_token} YOUR_USERNAME`"
    )
    bot.reply_to(message, instruction_msg, parse_mode="Markdown")


def complete_registration(message):
    global pending_registrations
    user_id = str(message.from_user.id)
    chat_type = message.chat.type

    # Registration must happen in private chat
    if chat_type != "private":
        return

    # Check if user has initiated registration
    if user_id not in pending_registrations:
        bot.reply_to(
            message, "Please start registration in the group chat first using /reg_sfs"
        )
        return

    parts = message.text.split()
    if len(parts) != 3:
        bot.reply_to(
            message,
            "Invalid format. Use: `/reg_sfs TOKEN USERNAME`",
            parse_mode="Markdown",
        )
        return

    _, provided_token, username = parts

    # Verify token
    if pending_registrations[user_id] != provided_token:
        bot.reply_to(message, "Invalid registration token.")
        return

    # Generate password
    password = generate_password()

    if username == "YOUR_USERNAME":
        bot.reply_to(
            message,
            "You should use own username instead example `YOUR_USERNAME`.",
            parse_mode="Markdown",
        )
        return

    # Create account via API
    result = create_account(API_URL, API_TOKEN, username, password, DRIVE_QUOTA)

    if result["status_code"] == 200:
        # Save registration
        registrations = load_registrations()
        registrations[user_id] = username
        registrations[username] = user_id
        save_registrations(registrations)

        # Remove pending registration
        del pending_registrations[user_id]

        # Send success message
        success_msg = (
            f"Successful registration:\nUsername: `{username}`\nPassword: `{password}`"
        )
        bot.reply_to(message, success_msg, parse_mode="Markdown")
    else:
        bot.reply_to(
            message,
            f"Registration failed: <code>{result['message']}</code>",
            parse_mode="HTML",
        )


@bot.message_handler(content_types=["left_chat_member"])
def handle_user_leave(message):
    user_id = str(message.left_chat_member.id)

    # Load registrations
    registrations = load_registrations()

    # Check if user was registered
    if user_id in registrations:
        username = registrations[user_id]

        # Delete account via API
        result = delete_account(API_URL, API_TOKEN, username)

        # Remove registration
        del registrations[user_id]
        if username in registrations:
            del registrations[username]
        save_registrations(registrations)

        # Notify in chat if deletion was successful
        if result["status_code"] == 200:
            bot.send_message(CHAT_ID, f"Account for {username} has been deleted.")
        else:
            bot.send_message(
                CHAT_ID, f"Failed to delete account for {username}: {result['message']}"
            )


from time import sleep
if __name__ == "__main__":
    while True:
        try:
            print("SFS Bot started...")
            bot.polling(none_stop=True)
        except KeyboardInterrupt:
            exit(0)
        except:
            sleep(0.5)