import os
from pathlib import Path

import typer

from clients import run

app = typer.Typer(help="PC-Visit Filetracker")


def default_session_history() -> Path:
    user_profile = Path(os.environ.get("USERPROFILE", str(Path.home())))
    return user_profile / "AppData" / "Roaming" / "pcvisit Data" / "Session History"


@app.callback(invoke_without_command=True)
def app_callback(context: typer.Context) -> None:
    """Verwalten der PC-Visit-Filetracker-Befehle."""
    if context.invoked_subcommand is None:
        typer.echo(context.get_help())


@app.command()
def clients(
    directory: Path | None = typer.Argument(None, help="Verzeichnis mit XML-Dateien"),
    output: Path = typer.Option(Path("clients.csv"), "--output", "-o", help="Zielpfad der CSV-Datei"),
) -> None:
    """Importiert Client-Daten aus Session-XML-Dateien."""
    directory = directory or default_session_history()
    try:
        xml_count, row_count = run(directory, output)
    except ValueError as error:
        raise typer.BadParameter(str(error), param_hint="directory") from error
    typer.echo(f"{xml_count} XML-Dateien gelesen, {row_count} Einträge nach {output} geschrieben.")


if __name__ == "__main__":
    app()