#!/usr/bin/env python3
import sys

from enum import Enum
from typing import Optional, Union
from telegram import ReplyKeyboardMarkup
from functools import partial

from home.config import config, AppConfigUnit, Translation
from home.telegram import bot
from home.telegram.config import TelegramBotConfig
from home.mqtt import MqttPayload, MqttNode, MqttWrapper, MqttModule
from home.mqtt import MqttNodesConfig
from home.mqtt.module.relay import MqttRelayModule, MqttRelayState
from home.mqtt.module.diagnostics import InitialDiagnosticsPayload, DiagnosticsPayload


if __name__ != '__main__':
    print(f'this script can not be imported as module', file=sys.stderr)
    sys.exit(1)


mqtt_nodes_config = MqttNodesConfig()


class RelayMqttBotConfig(AppConfigUnit, TelegramBotConfig):
    NAME = 'relay_mqtt_bot'

    _strings: Translation

    def __init__(self):
        super().__init__()
        self._strings = Translation('mqtt_nodes')

    @staticmethod
    def schema() -> Optional[dict]:
        return {
            **super(TelegramBotConfig).schema(),
            'relay_nodes': {
                'type': 'list',
                'required': True,
                'schema': {
                    'type': 'string'
                }
            },
        }

    @staticmethod
    def custom_validator(data):
        relay_node_names = mqtt_nodes_config.get_nodes(filters=('relay',), only_names=True)
        for node in data['relay_nodes']:
            if node not in relay_node_names:
                raise ValueError(f'unknown relay node "{node}"')

    def get_relay_name_translated(self, lang: str, relay_name: str) -> str:
        return self._strings.get(lang)[relay_name]['relay']


config.load_app(RelayMqttBotConfig)

bot.initialize()
bot.lang.ru(
    start_message="Выберите команду на клавиатуре",
    unknown_command="Неизвестная команда",
    done="Готово 👌",
)
bot.lang.en(
    start_message="Select command on the keyboard",
    unknown_command="Unknown command",
    done="Done 👌",
)


type_emojis = {
    'lamp': '💡'
}
status_emoji = {
    'on': '✅',
    'off': '❌'
}


mqtt: MqttWrapper
relay_nodes: dict[str, Union[MqttRelayModule, MqttModule]] = {}
relay_states: dict[str, MqttRelayState] = {}


class UserAction(Enum):
    ON = 'on'
    OFF = 'off'


def on_mqtt_message(node: MqttNode,
                    message: MqttPayload):
    if isinstance(message, InitialDiagnosticsPayload) or isinstance(message, DiagnosticsPayload):
        kwargs = dict(rssi=message.rssi, enabled=message.flags.state)
        if isinstance(message, InitialDiagnosticsPayload):
            kwargs['fw_version'] = message.fw_version
        if node.id not in relay_states:
            relay_states[node.id] = MqttRelayState()
        relay_states[node.id].update(**kwargs)


async def enable_handler(node_id: str, ctx: bot.Context) -> None:
    relay_nodes[node_id].switchpower(True)
    await ctx.reply(ctx.lang('done'))


async def disable_handler(node_id: str, ctx: bot.Context) -> None:
    relay_nodes[node_id].switchpower(False)
    await ctx.reply(ctx.lang('done'))


async def start(ctx: bot.Context) -> None:
    await ctx.reply(ctx.lang('start_message'))


@bot.exceptionhandler
async def exception_handler(e: Exception, ctx: bot.Context) -> bool:
    return False


@bot.defaultreplymarkup
def markup(ctx: Optional[bot.Context]) -> Optional[ReplyKeyboardMarkup]:
    buttons = []
    for node_id in config.app_config['relay_nodes']:
        node_data = mqtt_nodes_config.get_node(node_id)
        type_emoji = type_emojis[node_data['relay']['device_type']]
        row = [f'{type_emoji}{status_emoji[i.value]} {config.app_config.get_relay_name_translated(ctx.user_lang, node_id)}'
               for i in UserAction]
        buttons.append(row)
    return ReplyKeyboardMarkup(buttons, one_time_keyboard=False)


devices = []
mqtt = MqttWrapper(client_id='relay_mqtt_bot')
for node_id in config.app_config['relay_nodes']:
    node_data = mqtt_nodes_config.get_node(node_id)
    mqtt_node = MqttNode(node_id=node_id,
                         node_secret=node_data['password'])
    module_kwargs = {}
    try:
        if node_data['relay']['legacy_topics']:
            module_kwargs['legacy_topics'] = True
    except KeyError:
        pass
    relay_nodes[node_id] = mqtt_node.load_module('relay',  **module_kwargs)
    mqtt_node.add_payload_callback(on_mqtt_message)
    mqtt.add_node(mqtt_node)

    type_emoji = type_emojis[node_data['relay']['device_type']]

    for action in UserAction:
        messages = []
        for _lang in Translation.LANGUAGES:
            _label = config.app_config.get_relay_name_translated(_lang, node_id)
            messages.append(f'{type_emoji}{status_emoji[action.value]} {_label}')
        bot.handler(texts=messages)(partial(enable_handler if action == UserAction.ON else disable_handler, node_id))

mqtt.connect_and_loop(loop_forever=False)

bot.run(start_handler=start)

mqtt.disconnect()