import click
from flask.cli import with_appcontext

from .extensions import db
from .models import User


@click.command("init-db")
@click.option("--admin-user", required=True, help="Username for the initial admin")
@click.option("--admin-pass", required=True, help="Password for the initial admin")
@with_appcontext
def init_db_command(admin_user: str, admin_pass: str):
    """Create tables and ensure an admin account exists."""
    db.create_all()

    # Lightweight migration for older SQLite DBs: ensure User.email column exists.
    # This avoids requiring Alembic for this small project.
    try:
        cols = [r[1] for r in db.session.execute(db.text("PRAGMA table_info(user)")).fetchall()]
        if "email" not in cols:
            db.session.execute(db.text("ALTER TABLE user ADD COLUMN email VARCHAR(255)"))
            db.session.commit()
    except Exception:
        # Best-effort; if it fails we continue so fresh DBs still work.
        db.session.rollback()

    existing = User.query.filter_by(username=admin_user).first()
    if existing:
        if not existing.is_admin:
            existing.is_admin = True
        existing.set_password(admin_pass)
        db.session.commit()
        click.echo(f"Updated admin user '{admin_user}'.")
        return

    u = User(username=admin_user, is_admin=True)
    u.set_password(admin_pass)
    db.session.add(u)
    db.session.commit()
    click.echo(f"Created admin user '{admin_user}'.")