import os
import time
from datetime import datetime

from influxdb_client import InfluxDBClient, Point, WritePrecision, BucketsApi
from influxdb_client.client.write_api import SYNCHRONOUS
from influxdb_client.client.util import date_utils
from influxdb_client.client.util.date_utils import DateHelper
import dateutil.parser
from dateutil import tz




def parseDate(date_string: str):
	# 默认UTC时间转中国时间
	return dateutil.parser.parse(date_string).astimezone(tz.gettz('ETC/GMT-8'))


class HistoryDBManage():

	token = 'bWcPFA8o3CHoWi9dhJJxBHmD6lrpJ0KmzMA06FjAAGzktwwyreVF6dBCL9G2oonXzQdIUQcuMJyCe_TMwM-0XA=='
	org = "DCS"
	# bucket = "history"
	url = "http://localhost:6324"

	def __init__(self, bucket, mem = None):
		self.client = InfluxDBClient(url = self.url, token = self.token, org = self.org)
		self.writeApi = self.client.write_api(write_options = SYNCHRONOUS)
		self.deleteApi = self.client.delete_api()
		self.queryApi = self.client.query_api()
		self.bucketApi = self.client.buckets_api()
		self.mem = mem
		self.bucket = bucket
		date_utils.date_helper = DateHelper()
		date_utils.date_helper.parse_date = parseDate
		# if self.mem:
		self.startTime = 1680534

	def __del__(self):
		self.client.close()


	def writeFun(self, varName, value):
		try:
			value = int(value)
			point = Point(self.mem).tag("varName", varName).field("value", value).time(datetime.utcnow(), WritePrecision.NS)
			self.writeApi.write(self.bucket, self.org, point)
		except Exception as e:
			print(e)
			BucketsApi(self.client).create_bucket(bucket_name = self.bucket, org = self.org)

	def queryFun(self, varName):
		# startTime = time.mktime(time.strptime("%Y-%m-%d %H:%M:%S", mem))
		data = []
		timeList = []
		query = ' from(bucket:"{}")\
					|> range(start: {})\
					|> filter(fn:(r) => r._measurement == "{}")\
					|> filter(fn:(r) => r.varName == "{}")\
					|> filter(fn:(r) => r._field == "value" )'.format(self.bucket, self.startTime, self.mem, varName)
		results = self.queryApi.query(query, org = self.org)
		for result in results:   
			for record in result.records:
				data.append(record['_value'])
				timeList.append(record['_time'].strftime("%H:%M:%S:%f")[:-3])
		return data, timeList

	def deleteMem(self):
		self.deleteApi.delete(start = '1970-01-01T00:00:00Z', stop = '2099-01-01T00:00:00Z', predicate = '_measurement={}'.format(self.mem), bucket = self.bucket, org = self.org, )

	def deleteFun(self, varName):
		self.deleteApi.delete(start = '1970-01-01T00:00:00Z', stop = '2099-01-01T00:00:00Z', predicate = '_measurement={} AND varName={}'.format(self.mem, varName), bucket = self.bucket, org = self.org, )

	def deleteBucket(self):
		bucket = self.bucketApi.find_bucket_by_name(self.bucket)
		self.bucketApi.delete_bucket(bucket)

	def queryMem(self):
		query = 'from(bucket: "{}") |> range(start: 0) |> keys(column: " _measurement")'.format(self.bucket)
		result = self.queryApi.query(query)
		return result

	def queryVarName(self):
		tagSet = set()
		query = ' from(bucket:"{}")\
					|> range(start: {})\
					|> filter(fn:(r) => r._measurement == "{}")\
					|> filter(fn:(r) => r._field == "value")'.format(self.bucket, self.startTime, self.mem)
		results = self.queryApi.query(query, org = self.org)
		for result in results:
			for record in result.records:
				tagSet.add(record['varName'])
		return tagSet

if __name__ == '__main__':
	t = time.time()
	# t = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(t))
	print(t)
	h = HistoryDBManage(mem = t, bucket = 'history')
	h.writeFun('test1', 1)
	h.writeFun('test1', 2)
	h.writeFun('test1', 3)
	h.queryFun('test1')
	h.queryMem()
	h.deleteMem()
	# h.deleteBucket()