"""Compose template handling."""
from os import mkdir
from os.path import exists
from shlex import split
from shutil import rmtree
from subprocess import run

from flask import current_app

APP_TEMPLATES = {
    "gitea": "https://git.autonomic.zone/compose-stacks/gitea",
}


def create_data_dir() -> None:
    """Create data directory for compose templates."""
    try:
        mkdir(current_app.config["DATA_DIR"])
    except FileExistsError:
        pass


def clone_app_template(app_name: str) -> None:
    """Clone an application template repository."""
    clone_path = current_app.config["DATA_DIR"] / app_name
    clone_url = APP_TEMPLATES[app_name]
    if exists(clone_path):
        rmtree(clone_path)
    run(split(f"git clone {clone_url} {clone_path}"))