package spc

import "fmt"

const (
	OutlookTypeCategorical = "categorical"
	OutlookTypeTornado     = "tornado"
	OutlookTypeHail        = "hail"
	OutlookTypeWind        = "wind"
)

// GeoJSONProduct describes one required SPC convective outlook GeoJSON product.
type GeoJSONProduct struct {
	Key         string
	Day         int
	OutlookType string
	URL         string
}

// DiscussionProduct describes one required SPC convective outlook print page.
type DiscussionProduct struct {
	Key string
	Day int
	URL string
}

var geoJSONProducts = []GeoJSONProduct{
	{Key: "day1_categorical", Day: 1, OutlookType: OutlookTypeCategorical, URL: "https://www.spc.noaa.gov/products/outlook/day1otlk_cat.nolyr.geojson"},
	{Key: "day1_tornado", Day: 1, OutlookType: OutlookTypeTornado, URL: "https://www.spc.noaa.gov/products/outlook/day1otlk_torn.nolyr.geojson"},
	{Key: "day1_hail", Day: 1, OutlookType: OutlookTypeHail, URL: "https://www.spc.noaa.gov/products/outlook/day1otlk_hail.nolyr.geojson"},
	{Key: "day1_wind", Day: 1, OutlookType: OutlookTypeWind, URL: "https://www.spc.noaa.gov/products/outlook/day1otlk_wind.nolyr.geojson"},
	{Key: "day2_categorical", Day: 2, OutlookType: OutlookTypeCategorical, URL: "https://www.spc.noaa.gov/products/outlook/day2otlk_cat.nolyr.geojson"},
	{Key: "day2_tornado", Day: 2, OutlookType: OutlookTypeTornado, URL: "https://www.spc.noaa.gov/products/outlook/day2otlk_torn.nolyr.geojson"},
	{Key: "day2_hail", Day: 2, OutlookType: OutlookTypeHail, URL: "https://www.spc.noaa.gov/products/outlook/day2otlk_hail.nolyr.geojson"},
	{Key: "day2_wind", Day: 2, OutlookType: OutlookTypeWind, URL: "https://www.spc.noaa.gov/products/outlook/day2otlk_wind.nolyr.geojson"},
	{Key: "day3_categorical", Day: 3, OutlookType: OutlookTypeCategorical, URL: "https://www.spc.noaa.gov/products/outlook/day3otlk_cat.nolyr.geojson"},
}

var discussionProducts = []DiscussionProduct{
	{Key: "day1", Day: 1, URL: "https://www.spc.noaa.gov/products/outlook/day1otlk_prt.html"},
	{Key: "day2", Day: 2, URL: "https://www.spc.noaa.gov/products/outlook/day2otlk_prt.html"},
	{Key: "day3", Day: 3, URL: "https://www.spc.noaa.gov/products/outlook/day3otlk_prt.html"},
}

// GeoJSONProducts returns the required SPC convective outlook GeoJSON products
// in stable day/type order.
func GeoJSONProducts() []GeoJSONProduct {
	out := make([]GeoJSONProduct, len(geoJSONProducts))
	copy(out, geoJSONProducts)
	return out
}

// DiscussionProducts returns the required SPC convective outlook print pages in
// stable day order.
func DiscussionProducts() []DiscussionProduct {
	out := make([]DiscussionProduct, len(discussionProducts))
	copy(out, discussionProducts)
	return out
}

// GeoJSONProductByKey returns product metadata for a configured product key.
func GeoJSONProductByKey(key string) (GeoJSONProduct, bool) {
	for _, product := range geoJSONProducts {
		if product.Key == key {
			return product, true
		}
	}
	return GeoJSONProduct{}, false
}

// DiscussionProductByKey returns discussion metadata for a configured day key.
func DiscussionProductByKey(key string) (DiscussionProduct, bool) {
	for _, product := range discussionProducts {
		if product.Key == key {
			return product, true
		}
	}
	return DiscussionProduct{}, false
}

func validateProductDay(day int) error {
	if day < 1 || day > 3 {
		return fmt.Errorf("day must be 1, 2, or 3, got %d", day)
	}
	return nil
}