# Seed migration: populate sample 7-day weather forecasts for existing SoilLocations.

from datetime import timedelta

from django.db import migrations
from django.utils import timezone


SAMPLE_DAILY_DATA = [
    {
        "day_offset": 0,
        "temperature_min": 18.5,
        "temperature_max": 33.2,
        "temperature_mean": 25.8,
        "precipitation": 0.0,
        "precipitation_probability": 5.0,
        "humidity_mean": 28.0,
        "wind_speed_max": 12.0,
        "et0": 6.8,
        "weather_code": 0,
    },
    {
        "day_offset": 1,
        "temperature_min": 19.0,
        "temperature_max": 34.5,
        "temperature_mean": 26.7,
        "precipitation": 0.0,
        "precipitation_probability": 10.0,
        "humidity_mean": 30.0,
        "wind_speed_max": 14.0,
        "et0": 7.1,
        "weather_code": 1,
    },
    {
        "day_offset": 2,
        "temperature_min": 20.2,
        "temperature_max": 32.0,
        "temperature_mean": 26.1,
        "precipitation": 3.5,
        "precipitation_probability": 65.0,
        "humidity_mean": 52.0,
        "wind_speed_max": 18.0,
        "et0": 5.2,
        "weather_code": 61,
    },
    {
        "day_offset": 3,
        "temperature_min": 17.8,
        "temperature_max": 28.5,
        "temperature_mean": 23.1,
        "precipitation": 12.0,
        "precipitation_probability": 85.0,
        "humidity_mean": 70.0,
        "wind_speed_max": 22.0,
        "et0": 3.8,
        "weather_code": 63,
    },
    {
        "day_offset": 4,
        "temperature_min": 16.5,
        "temperature_max": 27.0,
        "temperature_mean": 21.7,
        "precipitation": 5.0,
        "precipitation_probability": 55.0,
        "humidity_mean": 60.0,
        "wind_speed_max": 16.0,
        "et0": 4.5,
        "weather_code": 61,
    },
    {
        "day_offset": 5,
        "temperature_min": 18.0,
        "temperature_max": 31.0,
        "temperature_mean": 24.5,
        "precipitation": 0.0,
        "precipitation_probability": 8.0,
        "humidity_mean": 35.0,
        "wind_speed_max": 10.0,
        "et0": 6.2,
        "weather_code": 2,
    },
    {
        "day_offset": 6,
        "temperature_min": 19.5,
        "temperature_max": 34.0,
        "temperature_mean": 26.7,
        "precipitation": 0.0,
        "precipitation_probability": 3.0,
        "humidity_mean": 25.0,
        "wind_speed_max": 8.0,
        "et0": 7.0,
        "weather_code": 0,
    },
]


def seed_forecasts(apps, schema_editor):
    SoilLocation = apps.get_model("location_data", "SoilLocation")
    WeatherForecast = apps.get_model("weather", "WeatherForecast")

    today = timezone.now().date()

    for location in SoilLocation.objects.all():
        for daily in SAMPLE_DAILY_DATA:
            forecast_date = today + timedelta(days=daily["day_offset"])
            WeatherForecast.objects.get_or_create(
                location=location,
                forecast_date=forecast_date,
                defaults={
                    "temperature_min": daily["temperature_min"],
                    "temperature_max": daily["temperature_max"],
                    "temperature_mean": daily["temperature_mean"],
                    "precipitation": daily["precipitation"],
                    "precipitation_probability": daily["precipitation_probability"],
                    "humidity_mean": daily["humidity_mean"],
                    "wind_speed_max": daily["wind_speed_max"],
                    "et0": daily["et0"],
                    "weather_code": daily["weather_code"],
                },
            )


def unseed_forecasts(apps, schema_editor):
    WeatherForecast = apps.get_model("weather", "WeatherForecast")
    WeatherForecast.objects.all().delete()


class Migration(migrations.Migration):

    dependencies = [
        ("weather", "0002_seed_weather_parameters"),
        ("location_data", "0002_soildepthdata_refactor"),
    ]

    operations = [
        migrations.RunPython(seed_forecasts, unseed_forecasts),
    ]