from django.db import models
from apps.utils.models import BaseModel, CommonBModel


class Mpoint(CommonBModel):
    """测点
    """
    name = models.CharField('测点名称', max_length=50)
    code = models.CharField('测点编号', max_length=50, unique=True)
    unit = models.CharField('单位', max_length=50)
    cate = models.CharField('分类', max_length=50, default='elec')
    ep_monitored = models.ForeignKey('em.equipment', verbose_name='监测哪个设备', related_name='mp_ep_monitored', on_delete=models.SET_NULL, null=True, blank=True)
    ep_belong = models.ForeignKey('em.equipment', verbose_name='属于哪个设备', related_name='mp_ep_belong', on_delete=models.SET_NULL, null=True, blank=True)
    mgroup = models.ForeignKey('mtm.mgroup', verbose_name='所在集合', on_delete=models.SET_NULL, null=True, blank=True)


class MpLog(BaseModel):
    """测点原始记录
    """
    mpoint = models.ForeignKey(Mpoint, verbose_name='关联测点', on_delete=models.SET_NULL, null=True, blank=True)
    tag_id = models.BigIntegerField('记录ID', db_index=True)
    tag_code = models.CharField('测点编号', max_length=50)
    tag_update = models.DateTimeField('更新时间')
    tag_val = models.FloatField('当前值')
    

class MpointStat(BaseModel):
    """测点统计表
    """
    type = models.CharField('统计维度', max_length=50, default='hour', help_text='year/month/day/hour')
    year = models.PositiveSmallIntegerField('年')
    month = models.PositiveSmallIntegerField('月', null=True, blank=True)
    day = models.PositiveSmallIntegerField('日', null=True, blank=True)
    hour = models.PositiveSmallIntegerField('时', null=True, blank=True)
    mpoint = models.ForeignKey(Mpoint, verbose_name='关联测点', on_delete=models.CASCADE)
    val = models.FloatField('统计值', default=0)