# Create your tasks here
from __future__ import absolute_import, unicode_literals
from apps.utils.tasks import CustomTask
from celery import shared_task
from apps.utils.sql import DbConnection
from server.settings import get_sysconfig
from django.core.cache import cache
from apps.wpm.models import SfLog
from apps.mtm.models import Mgroup
import datetime
from django.db.models import Sum
from apps.wpm.services import make_sflogs
from apps.wpm.models import SfLog, StLog, SfLogExp
from django.utils import timezone
from django.db.models import F

@shared_task(base=CustomTask)
def make_sflogs_simple(days, state_date:str, end_date:str):
    """
    根据班次规则生成今明两天的排班记录
    """
    if days:
        start_date = datetime.datetime.today()
        end_date = start_date + datetime.timedelta(days=days)
    else:
        start_date = datetime.datetime.strptime(state_date, "%Y-%m-%d").date()
        end_date = datetime.datetime.strptime(end_date, "%Y-%m-%d").date()
    mgroups = Mgroup.objects.filter(cate='section').all()
    for mgroup in mgroups:
            make_sflogs(mgroup, start_date, end_date)

@shared_task(base=CustomTask)
def get_total_hour_now(sflogId: str):
    """
    获取当前总时长, 当传入的是一个sflog时, 返回其total_hour_now
    否则更新所有total_hour_now
    """
    now = timezone.now()
    if sflogId:
        sflog = SfLog.objects.get(id=sflogId)
        if sflog.end_time <= now:
            sflog.total_hour_now = 12
        else:
            total_hour_now = (now-i.start_time).total_seconds()/3600
            sflog.total_hour_now = total_hour_now if total_hour_now > 0 else 0
        sflog.save()
        return sflog.total_hour_now
    else:
        SfLog.objects.filter(end_time__lte=now).exclude(total_hour_now=12).update(total_hour_now=12)
        sf_qs = SfLog.objects.filter(end_time__gt=now)
        for i in sf_qs:
            total_hour_now = (now-i.start_time).total_seconds()/3600
            i.total_hour_now = total_hour_now if total_hour_now > 0 else 0
            i.save()

@shared_task(base=CustomTask)
def cal_shut_hour(stlogId: str):
    """
    计算停机记录对应的班停时长
    """
    from apps.enm.tasks import cal_enstat
    if stlogId:
        stlogs = StLog.objects.filter(id=stlogId)
    else:
        stlogs = StLog.objects.filter(end_time=None)
    now = timezone.now()
    for stlog in stlogs:
        st_start = stlog.start_time
        if st_start >= now:
            break
        if stlog.end_time is None: # 说明停机还未结束,此时也需要计算duration
            st_end = now
        else:
            st_end = stlog.end_time
        sf_qs = SfLog.objects.filter(mgroup=stlog.mgroup)
        sf_qs = (sf_qs.filter(start_time__gte=st_start, start_time__lt=st_end)|sf_qs.filter(end_time__gt=st_start, end_time__lte=st_end)|sf_qs.filter(start_time__lte=st_start, end_time__gte=st_end)).order_by('start_time').distinct()
        for ind, sflog in enumerate(sf_qs):
            is_current_down = False
            if ind == 0:
                is_current_down = True
            sflogexp, _ = SfLogExp.objects.get_or_create(stlog=stlog, sflog=sflog, defaults={'stlog': stlog, 'sflog': sflog, 'is_current_down': is_current_down, 'title': '停机'})
            # 计算duration
            sf_end, sf_start = sflog.end_time, sflog.start_time
            duration_item_delta = min(sf_end, st_end) - max(sf_start, st_start)
            total_seconds = duration_item_delta.total_seconds()
            if total_seconds < 0:
                duration_item = 0
            else:
                duration_item = total_seconds/3600
            sflogexp.duration = duration_item
            sflogexp.save()
            # 计算每班的总停机时间
            ret = SfLogExp.objects.filter(sflog=sflog).exclude(stlog=None).aggregate(sum=Sum('duration'))
            if ret.get('sum', 0):
                sflog.shut_hour = ret['sum']
                sflog.save()
                # 更新sflog总时长
                if sflog.end_time > now:
                    get_total_hour_now(sflog.id)
                if stlogId:
                    cal_enstat('sflog', sflog.id, sflog.mgroup.id, None, None, None, None, None, None, None, cascade=True, cal_attrs=['run_hour'])


@shared_task(base=CustomTask)
def cal_enstat_when_pcoal_heat_change(sflogId):
    from apps.enm.models import EnStat
    from apps.enm.tasks import cal_enstat_pcoal_change, cal_enstat2
    sflog = SfLog.objects.get(id=sflogId)

    pcoal_heat = sflog.pcoal_heat
    year_s, month_s, day_s = sflog.get_ymd
    # 只会影响到回转窑及水泥磨数据
    enstats = EnStat.objects.filter(mgroup__name='回转窑', year_s=year_s, month_s=month_s, day_s=day_s, type__in = ['hour_s', 'sflog', 'day_s'])
    for enstat in enstats:
        cal_enstat_pcoal_change(enstat, pcoal_heat)
    enstats_other = EnStat.objects.filter(mgroup__name='回转窑', year_s=year_s, month_s=month_s, type__in = ['month_st', 'month_s'])|EnStat.objects.filter(mgroup__name='回转窑', year_s=year_s, type__in = ['year_s'])
    for enstat in enstats_other:
        cal_enstat_pcoal_change(enstat, pcoal_heat)

    cal_enstat2('day_s', year_s, month_s, day_s)


@shared_task(base=CustomTask)
def cal_enstat_when_team_change(sflogId):
    from apps.enm.tasks import cal_enstat
    sflog = SfLog.objects.get(id=sflogId)
    cal_enstat('month_st', sflogId, sflog.mgroup.id, None, None, None, None, None, None, None, False, [])