# -*- coding: utf-8 -*-

from enum import Enum
from typing import Dict, Tuple

import arrow
import numpy as np
from httpx import AsyncClient, URL
from loguru import logger

from app.core.config import settings
from app.services.service import Service
from app.utils.date import get_time_str, TIME_FMT
from app.utils.math import round_half_up


class InfoCode(str, Enum):
    temperature = 'Tdb'
    co2 = 'CO2'
    hcho = 'HCHO'
    pm2d5 = 'PM2d5'
    humidity = 'RH'
    supply_air_flow = 'SupplyAirFlow'
    supply_air_temperature = 'SupplyAirTemp'
    fan_speed = 'FanGear'


class DataPlatformService(Service):

    def __init__(
            self,
            client: AsyncClient,
            project_id: str,
            server_settings=settings
    ):
        super(DataPlatformService, self).__init__(client)
        self._project_id = project_id
        self._base_url = URL(server_settings.PLATFORM_HOST)
        self._now_time = get_time_str()
        self._secret = server_settings.PLATFORM_SECRET

    def _common_parameters(self) -> Dict:
        return {'projectId': self._project_id, 'secret': self._secret}

    async def get_realtime_data(self, code: InfoCode, object_id: str) -> float:
        url = self._base_url.join('data-platform-3/hisdata/query_by_obj')
        params = self._common_parameters()
        start_time = get_time_str(60 * 60, flag='ago')
        payload = {
            'criteria': {
                'id': object_id,
                'code': code.value,
                'receivetime': {
                    '$gte': start_time,
                    '$lte': self._now_time,
                }
            }
        }
        raw_info = await self._post(url, params, payload)

        # value = np.NAN
        # if raw_info.get('Content'):
        try:
            latest_data = raw_info.get('Content')[-1].get('data')
            latest_time = raw_info.get('Content')[-1].get('receivetime')
            if arrow.get(latest_time, TIME_FMT).shift(minutes=15) < arrow.get(self._now_time, TIME_FMT):
                logger.info(f'delayed data - {object_id}: ({latest_time}, {latest_data})')
            value = round_half_up(latest_data, 2)
        except KeyError:
            value = np.NAN

        return value

    async def get_realtime_temperature(self, space_id: str) -> float:
        return await self.get_realtime_data(InfoCode.temperature, space_id)

    async def get_realtime_co2(self, space_id: str) -> float:
        return await self.get_realtime_data(InfoCode.co2, space_id)

    async def get_realtime_hcho(self, space_id: str) -> float:
        return await self.get_realtime_data(InfoCode.hcho, space_id)

    async def get_realtime_pm2d5(self, space_id: str) -> float:
        return await self.get_realtime_data(InfoCode.pm2d5, space_id)

    async def get_realtime_humidity(self, space_id: str) -> float:
        return await self.get_realtime_data(InfoCode.humidity, space_id)

    async def get_realtime_supply_air_flow(self, equipment_id: str) -> float:
        return await self.get_realtime_data(InfoCode.supply_air_flow, equipment_id)

    async def get_realtime_supply_air_temperature(self, equipment_id: str) -> float:
        return await self.get_realtime_data(InfoCode.supply_air_temperature, equipment_id)

    async def get_fan_speed(self, equipment_id: str) -> float:
        return await self.get_realtime_data(InfoCode.fan_speed, equipment_id)

    async def get_static_info(self, code: str, object_id: str):
        url = self._base_url.join('data-platform-3/object/batch_query')
        params = self._common_parameters()
        payload = {
            'customInfo': True,
            'criterias': [
                {
                    'id': object_id
                }
            ]
        }
        raw_info = await self._post(url, params, payload)

        try:
            info = raw_info['Content'][0]['infos'][code]
        except KeyError as e:
            logger.error(f'id: {object_id}, details: {e}')
            info = None

        return info

    async def get_air_flow_limit(self, equipment_id: str) -> Tuple[float, float]:
        lower = await self.get_static_info('MinAirFlow', equipment_id)
        upper = await self.get_static_info('MaxAirFlow', equipment_id)
        if not lower:
            lower = 150.0
        if not upper:
            upper = 2000.0

        return lower, upper