#!/usr/bin/env python3

import wideq
import json
import time
import argparse
import sys
import re
import os.path
import logging
from typing import List
from pprint import pprint

STATE_FILE = "wideq_state.json"
LOGGER = logging.getLogger("wideq.example")


def authenticate(gateway):
    """Interactively authenticate the user via a browser to get an OAuth
    session.
    """

    login_url = gateway.oauth_url()
    print("Log in here:")
    print(login_url)
    print("Then paste the URL where the browser is redirected:")
    callback_url = input()
    return wideq.Auth.from_url(gateway, callback_url)


def ls(client):
    """List the user's devices."""

    for device in client.devices:
        print("{0.id}: {0.name} ({0.type.name} {0.model_id})".format(device))


def info(client, device_id):
    """Dump info on a device."""

    device = client.get_device(device_id)
    pprint(vars(device), indent=4, width=1)


def gen_mon(client, device_id):
    """Monitor any other device but AC device,
    displaying generic information about its status.
    """

    device = client.get_device(device_id)
    model = client.model_info(device)

    with wideq.Monitor(client.session, device_id) as mon:
        try:
            while True:
                time.sleep(1)
                print("Polling...")
                data = mon.poll()
                if data:
                    try:
                        res = model.decode_monitor(data)
                        print(res)
                    except ValueError:
                        print("status data: {!r}".format(data))
                """
                else:
                        for key, value in res.items():
                            try:
                                desc = model.value(key)
                            except KeyError:
                                print("- {}: {}".format(key, value))
                            if isinstance(desc, wideq.EnumValue):
                                print(
                                    "- {}: {}".format(
                                        key, desc.options.get(value, value)
                                    )
                                )
                            elif isinstance(desc, wideq.RangeValue):
                                print('- {0}: {1} ({2.min}-{2.max})'.format(
                                    key, value, desc,
                                )) """

        except KeyboardInterrupt:
            pass


def ac_mon(ac):
    """Monitor an AC/HVAC device, showing higher-level information about
    its status such as its temperature and operation mode.
    """

    try:
        ac.monitor_start()
    except wideq.core.NotConnectedError:
        print("Device not available.")
        return

    try:
        while True:
            time.sleep(1)
            state = ac.poll()
            if state:
                print(
                    "{1}; "
                    "{0.mode.name}; "
                    "cur {0.temp_cur_f}°F; "
                    "cfg {0.temp_cfg_f}°F; "
                    "fan speed {0.fan_speed.name}".format(
                        state, "on" if state.is_on else "off"
                    )
                )
            else:
                print("no state. Wait 1 more second.")

    except KeyboardInterrupt:
        pass
    finally:
        ac.monitor_stop()


def mon(client, device_id):
    """Monitor any device, displaying generic information about its
    status.
    """

    device_class = client.get_device_obj(device_id)
    if isinstance(device_class, wideq.ACDevice):
        ac_mon(device_class)
    else:
        gen_mon(client, device_id)


class UserError(Exception):
    """A user-visible command-line error."""

    def __init__(self, msg):
        self.msg = msg


def _force_device(client, device_id):
    """Look up a device in the client (using `get_device`), but raise
    UserError if the device is not found.
    """
    device = client.get_device(device_id)
    if not device:
        raise UserError('device "{}" not found'.format(device_id))
    return device


def set_temp(client, device_id, temp):
    """Set the configured temperature for an AC or refrigerator device."""

    device = client.get_device(device_id)

    if device.type == wideq.client.DeviceType.AC:
        ac = wideq.ACDevice(client, _force_device(client, device_id))
        ac.set_fahrenheit(int(temp))
    elif device.type == wideq.client.DeviceType.REFRIGERATOR:
        refrigerator = wideq.RefrigeratorDevice(
            client, _force_device(client, device_id)
        )
        refrigerator.set_temp_refrigerator_c(int(temp))
    else:
        raise UserError(
            "set-temp only suported for AC or refrigerator devices"
        )


def set_temp_freezer(client, device_id, temp):
    """Set the configured freezer temperature for a refrigerator device."""

    device = client.get_device(device_id)

    if device.type == wideq.client.DeviceType.REFRIGERATOR:
        refrigerator = wideq.RefrigeratorDevice(
            client, _force_device(client, device_id)
        )
        refrigerator.set_temp_freezer_c(int(temp))
    else:
        raise UserError(
            "set-temp-freezer only suported for refrigerator devices"
        )


def turn(client, device_id, on_off):
    """Turn on/off an AC device."""

    ac = wideq.ACDevice(client, _force_device(client, device_id))
    ac.set_on(on_off == "on")


def ac_config(client, device_id):
    ac = wideq.ACDevice(client, _force_device(client, device_id))
    print(ac.supported_operations)
    print(ac.supported_on_operation)
    print(ac.get_filter_state())
    print(ac.get_mfilter_state())
    print(ac.get_energy_target())
    print(ac.get_power(), " watts")
    print(ac.get_outdoor_power(), " watts")
    print(ac.get_volume())
    print(ac.get_light())
    print(ac.get_zones())


EXAMPLE_COMMANDS = {
    "ls": ls,
    "mon": mon,
    "set-temp": set_temp,
    "set-temp-freezer": set_temp_freezer,
    "turn": turn,
    "ac-config": ac_config,
    "info": info,
}


def example_command(client, cmd, args):
    func = EXAMPLE_COMMANDS.get(cmd)
    if not func:
        LOGGER.error(
            "Invalid command: '%s'.\n" "Use one of: %s",
            cmd,
            ", ".join(EXAMPLE_COMMANDS),
        )
        return
    func(client, *args)


def example(
    country: str, language: str, verbose: bool, cmd: str, args: List[str]
) -> None:
    if verbose:
        wideq.set_log_level(logging.DEBUG)

    # Load the current state for the example.
    try:
        with open(STATE_FILE) as f:
            LOGGER.debug("State file found '%s'", os.path.abspath(STATE_FILE))
            state = json.load(f)
    except IOError:
        state = {}
        LOGGER.debug(
            "No state file found (tried: '%s')", os.path.abspath(STATE_FILE)
        )

    client = wideq.Client.load(state)
    if country:
        client._country = country
    if language:
        client._language = language

    # Log in, if we don't already have an authentication.
    if not client._auth:
        client._auth = authenticate(client.gateway)

    # Loop to retry if session has expired.
    while True:
        try:
            example_command(client, cmd, args)
            break

        except wideq.NotLoggedInError:
            LOGGER.info("Session expired.")
            client.refresh()

        except UserError as exc:
            LOGGER.error(exc.msg)
            sys.exit(1)

    # Save the updated state.
    state = client.dump()
    with open(STATE_FILE, "w") as f:
        json.dump(state, f)
        LOGGER.debug("Wrote state file '%s'", os.path.abspath(STATE_FILE))


def main() -> None:
    """The main command-line entry point."""
    parser = argparse.ArgumentParser(
        description="Interact with the LG SmartThinQ API."
    )
    parser.add_argument(
        "cmd",
        metavar="CMD",
        nargs="?",
        default="ls",
        help=f'one of: {", ".join(EXAMPLE_COMMANDS)}',
    )
    parser.add_argument(
        "args", metavar="ARGS", nargs="*", help="subcommand arguments"
    )

    parser.add_argument(
        "--country",
        "-c",
        help=f"country code for account (default: {wideq.DEFAULT_COUNTRY})",
        default=wideq.DEFAULT_COUNTRY,
    )
    parser.add_argument(
        "--language",
        "-l",
        help=f"language code for the API (default: {wideq.DEFAULT_LANGUAGE})",
        default=wideq.DEFAULT_LANGUAGE,
    )
    parser.add_argument(
        "--verbose",
        "-v",
        help="verbose mode to help debugging",
        action="store_true",
        default=False,
    )

    args = parser.parse_args()
    country_regex = re.compile(r"^[A-Z]{2,3}$")
    if not country_regex.match(args.country):
        LOGGER.error(
            "Country must be two or three letters"
            " all upper case (e.g. US, NO, KR) got: '%s'",
            args.country,
        )
        exit(1)
    language_regex = re.compile(r"^[a-z]{2,3}-[A-Z]{2,3}$")
    if not language_regex.match(args.language):
        LOGGER.error(
            "Language must be a combination of language"
            " and country (e.g. en-US, no-NO, kr-KR)"
            " got: '%s'",
            args.language,
        )
        exit(1)
    example(args.country, args.language, args.verbose, args.cmd, args.args)


if __name__ == "__main__":
    main()