#!/usr/bin/env python3
"""
Create a new user for Hawbeez Ad Creative Studio.
Run from repo root: python backend/scripts/create_user.py --username admin --password yourpassword
Or from backend: python scripts/create_user.py --username admin --password yourpassword
"""

import argparse
import json
import sys
from pathlib import Path

# Add backend to path so app.auth is importable
backend_dir = Path(__file__).resolve().parent.parent
sys.path.insert(0, str(backend_dir))

from app.auth import DATA_DIR, USERS_PATH, get_user_by_username, hash_password


def main():
    parser = argparse.ArgumentParser(description="Create a new Hawbeez user")
    parser.add_argument("--username", "-u", required=True, help="Username")
    parser.add_argument("--password", "-p", required=True, help="Password")
    args = parser.parse_args()

    username = (args.username or "").strip()
    password = (args.password or "").strip()

    if not username:
        print("Error: username is required and cannot be empty.", file=sys.stderr)
        sys.exit(1)
    if not password:
        print("Error: password is required and cannot be empty.", file=sys.stderr)
        sys.exit(1)

    if get_user_by_username(username):
        print(f"Error: User '{username}' already exists.", file=sys.stderr)
        sys.exit(1)

    DATA_DIR.mkdir(parents=True, exist_ok=True)
    users = []
    if USERS_PATH.exists():
        try:
            with open(USERS_PATH, "r") as f:
                users = json.load(f)
        except (json.JSONDecodeError, OSError):
            users = []

    next_id = max((u.get("id") or 0) for u in users) + 1 if users else 1
    new_user = {
        "id": next_id,
        "username": username,
        "password_hash": hash_password(password),
    }
    users.append(new_user)

    with open(USERS_PATH, "w") as f:
        json.dump(users, f, indent=2)

    print(f"User '{username}' created successfully (id={next_id}).")
    print(f"Users file: {USERS_PATH}")


if __name__ == "__main__":
    main()