import os
import time as stime
import redis
import h5py
from os import path
import re
from datetime import timedelta
from datetime import datetime
import numpy as np

class SpeedDataCenter(object):
    latest_delta = 10
    def __init__(self):
        self._mquit = False
        self._mRHost = ''
        self._mRPort = 6379
        self._file_name = '/var/www/html/data/stdata/speed.hdf5'

    def set_redis(self, rhost, rport):
        self._mRHost = rhost
        self._mRPort = rport

    def stop(self):
        self._mquit = True
        pass

    def prepare_data(self):
        pool = redis.ConnectionPool(host=self._mRHost, port=self._mRPort, db=0)
        r = redis.Redis(connection_pool=pool)

        while self._mquit == False:
            try:
                print('open file:', datetime.now())
                if path.exists(self._file_name):
                    hfive = h5py.File(self._file_name, 'a')
                else:
                    hfive = h5py.File(self._file_name, 'w')

                latest_time = int(stime.time()) - self.latest_delta
                print('read redis:', datetime.now())
                self.read_redis(hfive, r, 'nc_commit_speed_monitor')
                hfive.close()

                print('del redis:', datetime.now())
                self.del_redis(r, 'nc_commit_speed_monitor',latest_time)
                print('del redis:', datetime.now())
            except Exception as ex:
                print(ex)
            finally:
                stime.sleep(1)

    def del_redis(self, redis, name,latest_time):
        for item in redis.hscan_iter(name):
            key = str(item[0], encoding="utf-8")
            items = re.split(r'-', key)
            fdel = True
            if len(items) == 5:
                (chname, quality, card_type, amount, time) = items
                time = int(time)
                if time > latest_time:
                    fdel = False
            if fdel:
                redis.hdel(name, key)
        pass

    def read_redis(self, hfive, redis, name):
        for item in redis.hscan_iter(name):
            key = str(item[0], encoding="utf-8")
            val = str(item[1], encoding="utf-8")
            self.parase(hfive, key, val)

    def parase(self, hfive, text, val):
        items = re.split(r'-', text)
        if len(items) != 5:
            return False

        (chname, quality, card_type, spec, time) = items
        time = int(time)
        today = self.day_stamp(time)
        path = f'/{today}/{chname}/{quality}/{card_type}/{spec}'
        if path not in hfive:
            hfive[path] = np.zeros((1, 86400))

        diff = time - today
        hfive[path][0, diff] = val
        print(path, 0, diff, val, hfive[path][0, diff])
        pass

    def day_stamp(self, stamp):
        stamp = int(stamp)
        x = stime.gmtime(stamp + 8 * 3600)
        diff = timedelta(hours=x.tm_hour, minutes=x.tm_min, seconds=x.tm_sec)
        today = stamp - diff.total_seconds()
        return int(today)
########################################################################################################################

    def channl_speed(self):
        import json

        r = None
        try:
            pool = redis.ConnectionPool(host=self._mRHost, port=self._mRPort, db=0)
            r = redis.Redis(connection_pool=pool)
        except Exception as ex:
            print(ex)

        while True:
            try:
                time_stamp = int(stime.time())
                paths = self.paths(time_stamp)
                day_stamp = self.day_stamp(time_stamp)
                (pos_start, pos_end) = self._pos_range(time_stamp - day_stamp)

                hfive = h5py.File(self._file_name, 'r')
                result = {}
                for path in paths:
                    key = self._parse_path(path)
                    speed = self._calc_speed(hfive, path, pos_start, pos_end)
                    result[key] = speed
                    pass
                hfive.close()

                if len(result) != 0:
                    r.set(f"nc_channels_speed", json.dumps(result))
                    r.publish('refill', json.dumps({'type': 'channels_speed', 'value': 0}))
                    print(datetime.now(), 'push msg=', result)
            except Exception as ex:
                print(ex)
            finally:
                stime.sleep(0.1)

    def _parse_path(self,path):
        items = re.split(r'/', path)
        if len(items) != 6:
            return False
        (_, _sday, _chname, _quality, _card_type, _spec) = items
        key = f'{_chname}-{_spec}-{_card_type}-{_quality}' #接收端的key，是如此定义的
        return key

    def _pos_range(self,end):
        pos_day = np.arange(0, 86400, 1)

        period = 60
        if end - period > 0:
            start = end - period
            pos_start = np.where(pos_day > start)
        else:
            start = 0
            pos_start = np.where(pos_day >= start)

        pos_day = pos_day[pos_start]
        pos_end = np.where(pos_day <= end)

        return pos_start, pos_end

    def _calc_speed(self,hFive,path,pos_start, pos_end):
        datas = hFive[path]
        commit = datas[0]
        commit = commit[pos_start]
        commit = commit[pos_end]
        speed = int(np.sum(commit))
        return speed

    def paths(self, time_stamp):
        try:
            day_stamp = self.day_stamp(time_stamp)
            hfive = h5py.File(self._file_name, 'r')
            group = hfive.require_group(f'/{day_stamp}')
            paths = self.dir(group)
            hfive.close()
            return paths
        except Exception as ex:
            print(ex)
            return []

    def dir(self, group):
        result = []
        for name, sub in group.items():
            if isinstance(sub, h5py.Group):
                result.extend(self.dir(sub))
            else:
                result.append(sub.name)
        return result

speedDataCenter = SpeedDataCenter()