// forecast.go presents hourly forecast payloads in metric and US shapes.
// Layer: adapters/inbound/httpapi/presenter forecast payload mapping.
package presenter

import (
	"time"

	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
)

// WeatherForecastRunUS is the US-customary response shape for hourly forecasts.
type WeatherForecastRunUS struct {
	LocationID    string                    `json:"locationId,omitempty" xml:"locationId,omitempty"`
	LocationName  string                    `json:"locationName,omitempty" xml:"locationName,omitempty"`
	IssuedAt      time.Time                 `json:"issuedAt" xml:"issuedAt"`
	UpdatedAt     *time.Time                `json:"updatedAt,omitempty" xml:"updatedAt,omitempty"`
	Product       model.ForecastProduct     `json:"product" xml:"product"`
	Latitude      *float64                  `json:"latitude,omitempty" xml:"latitude,omitempty"`
	Longitude     *float64                  `json:"longitude,omitempty" xml:"longitude,omitempty"`
	ElevationFeet *float64                  `json:"elevationFeet,omitempty" xml:"elevationFeet,omitempty"`
	Periods       []WeatherForecastPeriodUS `json:"periods" xml:"periods"`
}

// WeatherForecastPeriodUS is the US-customary response shape for forecast periods.
type WeatherForecastPeriodUS struct {
	StartTime                         time.Time     `json:"startTime" xml:"startTime"`
	EndTime                           time.Time     `json:"endTime" xml:"endTime"`
	Name                              string        `json:"name,omitempty" xml:"name,omitempty"`
	IsDay                             *bool         `json:"isDay,omitempty" xml:"isDay,omitempty"`
	ConditionCode                     model.WMOCode `json:"conditionCode" xml:"conditionCode"`
	ConditionText                     string        `json:"conditionText,omitempty" xml:"conditionText,omitempty"`
	ProviderRawDescription            string        `json:"providerRawDescription,omitempty" xml:"providerRawDescription,omitempty"`
	TextDescription                   string        `json:"textDescription,omitempty" xml:"textDescription,omitempty"`
	DetailedText                      string        `json:"detailedText,omitempty" xml:"detailedText,omitempty"`
	IconURL                           string        `json:"iconUrl,omitempty" xml:"iconUrl,omitempty"`
	TemperatureF                      *float64      `json:"temperatureF,omitempty" xml:"temperatureF,omitempty"`
	TemperatureFMin                   *float64      `json:"temperatureFMin,omitempty" xml:"temperatureFMin,omitempty"`
	TemperatureFMax                   *float64      `json:"temperatureFMax,omitempty" xml:"temperatureFMax,omitempty"`
	DewpointF                         *float64      `json:"dewpointF,omitempty" xml:"dewpointF,omitempty"`
	RelativeHumidityPercent           *float64      `json:"relativeHumidityPercent,omitempty" xml:"relativeHumidityPercent,omitempty"`
	WindDirectionDegrees              *float64      `json:"windDirectionDegrees,omitempty" xml:"windDirectionDegrees,omitempty"`
	WindSpeedMph                      *float64      `json:"windSpeedMph,omitempty" xml:"windSpeedMph,omitempty"`
	WindGustMph                       *float64      `json:"windGustMph,omitempty" xml:"windGustMph,omitempty"`
	BarometricPressureInHg            *float64      `json:"barometricPressureInHg,omitempty" xml:"barometricPressureInHg,omitempty"`
	VisibilityMiles                   *float64      `json:"visibilityMiles,omitempty" xml:"visibilityMiles,omitempty"`
	ApparentTemperatureF              *float64      `json:"apparentTemperatureF,omitempty" xml:"apparentTemperatureF,omitempty"`
	CloudCoverPercent                 *float64      `json:"cloudCoverPercent,omitempty" xml:"cloudCoverPercent,omitempty"`
	ProbabilityOfPrecipitationPercent *float64      `json:"probabilityOfPrecipitationPercent,omitempty" xml:"probabilityOfPrecipitationPercent,omitempty"`
	PrecipitationAmountIn             *float64      `json:"precipitationAmountIn,omitempty" xml:"precipitationAmountIn,omitempty"`
	SnowfallDepthIn                   *float64      `json:"snowfallDepthIn,omitempty" xml:"snowfallDepthIn,omitempty"`
	UVIndex                           *float64      `json:"uvIndex,omitempty" xml:"uvIndex,omitempty"`
}

func ForecastPayload(run *model.WeatherForecastRun, units Units) any {
	if run == nil {
		return nil
	}
	if units == UnitsUS {
		out := WeatherForecastRunUS{
			LocationID:    run.LocationID,
			LocationName:  run.LocationName,
			IssuedAt:      run.IssuedAt,
			UpdatedAt:     copyTimePtr(run.UpdatedAt),
			Product:       run.Product,
			Latitude:      copyFloat64Ptr(run.Latitude),
			Longitude:     copyFloat64Ptr(run.Longitude),
			ElevationFeet: scalePtr(run.ElevationMeters, metersToFeetFactor),
			Periods:       make([]WeatherForecastPeriodUS, 0, len(run.Periods)),
		}
		for _, p := range run.Periods {
			out.Periods = append(out.Periods, WeatherForecastPeriodUS{
				StartTime:                         p.StartTime,
				EndTime:                           p.EndTime,
				Name:                              p.Name,
				IsDay:                             copyBoolPtr(p.IsDay),
				ConditionCode:                     p.ConditionCode,
				ConditionText:                     p.ConditionText,
				ProviderRawDescription:            p.ProviderRawDescription,
				TextDescription:                   p.TextDescription,
				DetailedText:                      p.DetailedText,
				IconURL:                           p.IconURL,
				TemperatureF:                      celsiusToFahrenheitPtr(p.TemperatureC),
				TemperatureFMin:                   celsiusToFahrenheitPtr(p.TemperatureCMin),
				TemperatureFMax:                   celsiusToFahrenheitPtr(p.TemperatureCMax),
				DewpointF:                         celsiusToFahrenheitPtr(p.DewpointC),
				RelativeHumidityPercent:           copyFloat64Ptr(p.RelativeHumidityPercent),
				WindDirectionDegrees:              copyFloat64Ptr(p.WindDirectionDegrees),
				WindSpeedMph:                      scalePtr(p.WindSpeedKmh, kmhToMphFactor),
				WindGustMph:                       scalePtr(p.WindGustKmh, kmhToMphFactor),
				BarometricPressureInHg:            scalePtr(p.BarometricPressurePa, paToInHgFactor),
				VisibilityMiles:                   scalePtr(p.VisibilityMeters, metersToMilesFactor),
				ApparentTemperatureF:              celsiusToFahrenheitPtr(p.ApparentTemperatureC),
				CloudCoverPercent:                 copyFloat64Ptr(p.CloudCoverPercent),
				ProbabilityOfPrecipitationPercent: copyFloat64Ptr(p.ProbabilityOfPrecipitationPercent),
				PrecipitationAmountIn:             scalePtr(p.PrecipitationAmountMm, mmToInchesFactor),
				SnowfallDepthIn:                   scalePtr(p.SnowfallDepthMM, mmToInchesFactor),
				UVIndex:                           copyFloat64Ptr(p.UVIndex),
			})
		}
		return out
	}
	return run
}