from django.db import models
from django.utils import timezone

# Create your models here.
class Sensor(models.Model):
    name = models.CharField(max_length=20, default="bedroom-bme280-01")
    location = models.CharField(max_length=128, default="somewhere")
    temperature_unit = models.CharField(max_length=5, default="C")
    pressure_unit = models.CharField(max_length=5, default="hPa")
    humidity_unit = models.CharField(max_length=5, default="%")
    def __str__(self):
        return f"""Sensor {self.name}, at {self.location}, units are C
        (temperature), hPa (pressure) and % (humidity)"""

class Measurement(models.Model):
    sensor = models.IntegerField(default=0)
    time = models.DateTimeField('timestamp', default=timezone.now)
    temperature = models.FloatField(default=-400)
    humidity = models.FloatField(default=-1)
    pressure = models.FloatField(default=-1)
    def __str__(self):
        return f"{self.time}, {self.temperature} C, {self.pressure} hPa, {self.humidity} %"