"""Home Assistant command line scripts."""
import argparse
import asyncio
import importlib
import logging
import os
import sys
from typing import List, Optional, Sequence, Text

from homeassistant.bootstrap import async_mount_local_lib_path
from homeassistant.config import get_default_config_dir
from homeassistant.requirements import pip_kwargs
from homeassistant.util.package import install_package, is_virtual_env, is_installed


# mypy: allow-untyped-defs, no-warn-return-any


def run(args: List) -> int:
    """Run a script."""
    scripts = []
    path = os.path.dirname(__file__)
    for fil in os.listdir(path):
        if fil == "__pycache__":
            continue

        if os.path.isdir(os.path.join(path, fil)):
            scripts.append(fil)
        elif fil != "__init__.py" and fil.endswith(".py"):
            scripts.append(fil[:-3])

    if not args:
        print("Please specify a script to run.")
        print("Available scripts:", ", ".join(scripts))
        return 1

    if args[0] not in scripts:
        print("Invalid script specified.")
        print("Available scripts:", ", ".join(scripts))
        return 1

    script = importlib.import_module("homeassistant.scripts." + args[0])

    config_dir = extract_config_dir()

    loop = asyncio.get_event_loop()

    if not is_virtual_env():
        loop.run_until_complete(async_mount_local_lib_path(config_dir))

    _pip_kwargs = pip_kwargs(config_dir)

    logging.basicConfig(stream=sys.stdout, level=logging.INFO)

    for req in getattr(script, "REQUIREMENTS", []):
        if is_installed(req):
            continue

        if not install_package(req, **_pip_kwargs):
            print("Aborting script, could not install dependency", req)
            return 1

    return script.run(args[1:])  # type: ignore


def extract_config_dir(args: Optional[Sequence[Text]] = None) -> str:
    """Extract the config dir from the arguments or get the default."""
    parser = argparse.ArgumentParser(add_help=False)
    parser.add_argument("-c", "--config", default=None)
    parsed_args = parser.parse_known_args(args)[0]
    return (
        os.path.join(os.getcwd(), parsed_args.config)
        if parsed_args.config
        else get_default_config_dir()
    )