"""Script to install/uninstall HA into OS X."""
import os
import time

# mypy: allow-untyped-calls, allow-untyped-defs


def install_osx():
    """Set up to run via launchd on OS X."""
    with os.popen("which hass") as inp:
        hass_path = inp.read().strip()

    with os.popen("whoami") as inp:
        user = inp.read().strip()

    template_path = os.path.join(os.path.dirname(__file__), "launchd.plist")

    with open(template_path, encoding="utf-8") as tinp:
        plist = tinp.read()

    plist = plist.replace("$HASS_PATH$", hass_path)
    plist = plist.replace("$USER$", user)

    path = os.path.expanduser("~/Library/LaunchAgents/org.homeassistant.plist")

    try:
        with open(path, "w", encoding="utf-8") as outp:
            outp.write(plist)
    except OSError as err:
        print(f"Unable to write to {path}", err)
        return

    os.popen(f"launchctl load -w -F {path}")

    print(
        "Home Assistant has been installed. \
        Open it here: http://localhost:8123"
    )


def uninstall_osx():
    """Unload from launchd on OS X."""
    path = os.path.expanduser("~/Library/LaunchAgents/org.homeassistant.plist")
    os.popen(f"launchctl unload {path}")

    print("Home Assistant has been uninstalled.")


def run(args):
    """Handle OSX commandline script."""
    commands = "install", "uninstall", "restart"
    if not args or args[0] not in commands:
        print("Invalid command. Available commands:", ", ".join(commands))
        return 1

    if args[0] == "install":
        install_osx()
        return 0
    if args[0] == "uninstall":
        uninstall_osx()
        return 0
    if args[0] == "restart":
        uninstall_osx()
        # A small delay is needed on some systems to let the unload finish.
        time.sleep(0.5)
        install_osx()
        return 0
