"""
session_export.py
─────────────────
Run this ONCE locally to export your Telethon session to a string.
Copy the printed string and paste it as SESSION_STRING in Render env vars.

Usage:
    python session_export.py
"""
from telethon.sync import TelegramClient
from telethon.sessions import StringSession
from dotenv import load_dotenv
import os

load_dotenv()

API_ID   = int(os.getenv("API_ID"))
API_HASH = os.getenv("API_HASH")
PHONE    = os.getenv("PHONE_NUMBER")

print("=" * 60)
print("  Telegram Session Exporter")
print("=" * 60)
print("This will log in to Telegram and export your session as a")
print("string that can be stored safely as an environment variable.")
print()

with TelegramClient(StringSession(), API_ID, API_HASH) as client:
    client.start(phone=PHONE)
    session_string = client.session.save()

print()
print("=" * 60)
print("  SUCCESS! Copy the line below:")
print("=" * 60)
print()
print(f"SESSION_STRING={session_string}")
print()
print("Paste this into your Render environment variables.")
print("=" * 60)