iface

type Astro struct {
	Moonrise time.Time
	Moonset  time.Time
	Sunrise  time.Time
	Sunset   time.Time
}

type Backend interface {
	Setup()
	Fetch(location string, numdays int) Data
}

type Cond struct {
	// Time is the time, where this weather condition applies.
	Time time.Time

	// Code is the general weather condition and must be one the WeatherCode
	// constants.
	Code WeatherCode

	// Desc is a short string describing the condition. It should be just one
	// sentence.
	Desc string

	// TempC is the temperature in degrees celsius.
	TempC *float32

	// FeelsLikeC is the felt temperature (with windchill effect e.g.) in
	// degrees celsius.
	FeelsLikeC *float32

	// ChanceOfRainPercent is the probability of rain or snow. It must be in the
	// range [0, 100].
	ChanceOfRainPercent *int

	// PrecipM is the precipitation amount in meters(!) per hour. Must be >= 0.
	PrecipM *float32

	// VisibleDistM is the visibility range in meters(!). It must be >= 0.
	VisibleDistM *float32

	// WindspeedKmph is the average wind speed in kilometers per hour. The value
	// must be >= 0.
	WindspeedKmph *float32

	// WindGustKmph is the maximum temporary wind speed in kilometers per
	// second. It should be > WindspeedKmph.
	WindGustKmph *float32

	// WinddirDegree is the direction the wind is blowing from on a clock
	// oriented circle with 360 degrees. 0 means the wind is blowing from north,
	// 90 means the wind is blowing from east, 180 means the wind is blowing
	// from south and 270 means the wind is blowing from west. The value must be
	// in the range [0, 359].
	WinddirDegree *int

	// Humidity is the *relative* humidity and must be in [0, 100].
	Humidity *int
}

type Data struct {
	Current  Cond
	Forecast []Day
	Location string
	GeoLoc   *LatLon
}

type Day struct {
	// Date is the date of this Day.
	Date time.Time

	// Slots is a slice of conditions for different times of day. They should be
	// ordered by the contained Time field.
	Slots []Cond

	// Astronomy contains planetary data.
	Astronomy Astro
}

type Frontend interface {
	Setup()
	Render(weather Data, unitSystem UnitSystem)
}

type LatLon struct {
	Latitude  float32
	Longitude float32
}

type UnitSystem int

type WeatherCode int