import taos
import sys
import datetime
import inspect

from util.log import *
from util.sql import *
from util.cases import *
import random


class TDTestCase:
    updatecfgDict = {"countAlwaysReturnValue":0}

    def init(self, conn, logSql, replicaVar=1):
        tdLog.debug(f"start to excute {__file__}")
        tdSql.init(conn.cursor(), False)

    def prepare_data(self, dbname="db"):
        tdSql.execute(
            f"create database if not exists {dbname} keep 3650 duration 1000")
        tdSql.execute(f"use {dbname} ")
        tdSql.execute(
            f"create table {dbname}.tb (ts timestamp, c0 int)"
        )
        tdSql.execute(
            f"create table {dbname}.stb (ts timestamp, c0 int) tags (t0 int)"
        )
        tdSql.execute(
            f"create table {dbname}.ctb1 using {dbname}.stb tags (1)"
        )
        tdSql.execute(
            f"create table {dbname}.ctb2 using {dbname}.stb tags (2)"
        )

        tdSql.execute(
            f"insert into {dbname}.tb values (now(), NULL)")

        tdSql.execute(
            f"insert into {dbname}.ctb1 values (now(), NULL)")

        tdSql.execute(
            f"insert into {dbname}.ctb2 values (now() + 1s, NULL)")

    def test_results(self, dbname="db"):

        # count
        tdSql.query(f"select count(c0) from {dbname}.tb")
        tdSql.checkRows(0)

        tdSql.query(f"select count(NULL) from {dbname}.tb")
        tdSql.checkRows(0)

        tdSql.query(f"select c0,count(c0) from {dbname}.tb group by c0")
        tdSql.checkRows(1)
        tdSql.checkData(0, 0, None)

        tdSql.query(f"select count(c0) from {dbname}.stb")
        tdSql.checkRows(0)

        tdSql.query(f"select count(NULL) from {dbname}.stb")
        tdSql.checkRows(0)

        tdSql.query(f"select c0,count(c0) from {dbname}.stb group by c0")
        tdSql.checkRows(1)
        tdSql.checkData(0, 0, None)

        tdSql.query(f"select count(NULL)")
        tdSql.checkRows(1)
        tdSql.checkData(0, 0, 0)

        # hyperloglog
        tdSql.query(f"select hyperloglog(c0) from {dbname}.tb")
        tdSql.checkRows(0)

        tdSql.query(f"select hyperloglog(NULL) from {dbname}.tb")
        tdSql.checkRows(0)

        tdSql.query(f"select c0,hyperloglog(c0) from {dbname}.tb group by c0")
        tdSql.checkRows(1)
        tdSql.checkData(0, 0, None)

        tdSql.query(f"select hyperloglog(c0) from {dbname}.stb")
        tdSql.checkRows(0)

        tdSql.query(f"select hyperloglog(NULL) from {dbname}.stb")
        tdSql.checkRows(0)

        tdSql.query(f"select c0,hyperloglog(c0) from {dbname}.stb group by c0")
        tdSql.checkRows(1)
        tdSql.checkData(0, 0, None)

        tdSql.query(f"select hyperloglog(NULL)")
        tdSql.checkRows(1)
        tdSql.checkData(0, 0, 0)

    def run(self):
        tdSql.prepare()

        tdLog.printNoPrefix("==========step1:prepare data ==============")

        self.prepare_data()

        tdLog.printNoPrefix("==========step2:test results ==============")

        self.test_results()


    def stop(self):
        tdSql.close()
        tdLog.success(f"{__file__} successfully executed")


tdCases.addLinux(__file__, TDTestCase())
tdCases.addWindows(__file__, TDTestCase())