package wunderground

import (
	"context"
	"net/http"
	"net/url"
	"time"

	"github.com/gorilla/schema"

	"gitea.libretechconsulting.com/rmcguire/ambient-weather-local-exporter/pkg/weather"
)

type WUProvider struct{}

const providerName = "weatherunderground"

func (wu *WUProvider) Name() string {
	return providerName
}

// Takes an inbound request from the ambient device and maps
// to a stable struct for weather updates
func (wu *WUProvider) ReqToWeather(_ context.Context, r *http.Request) (
	*weather.WeatherUpdate, error,
) {
	wuUpdate, err := UnmarshalQueryParams(r.URL.Query())
	if err != nil {
		return nil, err
	}

	return MapWUUpdate(wuUpdate), nil
}

func MapWUUpdate(wuUpdate *WundergroundUpdate) *weather.WeatherUpdate {
	updateTime, err := time.Parse(time.DateTime, wuUpdate.DateUTC)
	if err != nil {
		updateTime = time.Now()
	}

	return &weather.WeatherUpdate{
		StationType:     wuUpdate.SoftwareType,
		DateUTC:         &updateTime,
		TempF:           wuUpdate.Tempf,
		Humidity:        wuUpdate.Humidity,
		WindSpeedMPH:    wuUpdate.WindGustMPH,
		WindGustMPH:     wuUpdate.WindGustMPH,
		WindDir:         wuUpdate.WindDir,
		UV:              wuUpdate.UV,
		SolarRadiation:  wuUpdate.SolarRadiation,
		HourlyRainIn:    wuUpdate.RainIn,
		DailyRainIn:     wuUpdate.DailyRainIn,
		WeeklyRainIn:    wuUpdate.WeeklyRainIn,
		MonthlyRainIn:   wuUpdate.MonthlyRainIn,
		YearlyRainIn:    wuUpdate.YearlyRainIn,
		TempInsideF:     wuUpdate.IndoorTempF,
		HumidityInside:  wuUpdate.IndoorHumidity,
		BaromRelativeIn: wuUpdate.BaromIn,
	}
}

func UnmarshalQueryParams(query url.Values) (*WundergroundUpdate, error) {
	update := new(WundergroundUpdate)

	if err := schema.NewDecoder().Decode(update, query); err != nil {
		return nil, err
	}

	return update, nil
}