package geo

// AWSRegion is one AWS commercial region's metro-area point and the place
// name every surface shows for it (spec §14, copy C23 as approved in the
// nearest-region copy record).
//
// Source: AWS's official region list
// (https://docs.aws.amazon.com/global-infrastructure/latest/regions/aws-regions.html)
// as of 2026-10-01. Coordinates are each region's metro area, checked by
// hand; AWS publishes no facility locations, and tens of kilometres never
// change a choice between regions.
type AWSRegion struct {
	Point
	Place string
}

var awsRegions = map[string]AWSRegion{
	"us-east-1":      {Point{39.04, -77.49}, "US East · N. Virginia"},
	"us-east-2":      {Point{39.96, -83.00}, "US East · Ohio"},
	"us-west-1":      {Point{37.77, -122.42}, "US West · N. California"},
	"us-west-2":      {Point{45.84, -119.70}, "US West · Oregon"},
	"ca-central-1":   {Point{45.50, -73.57}, "Canada · Montréal"},
	"ca-west-1":      {Point{51.05, -114.07}, "Canada · Calgary"},
	"mx-central-1":   {Point{20.59, -100.39}, "Mexico · Querétaro"},
	"sa-east-1":      {Point{-23.55, -46.63}, "Brazil · São Paulo"},
	"eu-west-1":      {Point{53.35, -6.26}, "Ireland · Dublin"},
	"eu-west-2":      {Point{51.51, -0.13}, "UK · London"},
	"eu-west-3":      {Point{48.86, 2.35}, "France · Paris"},
	"eu-central-1":   {Point{50.11, 8.68}, "Germany · Frankfurt"},
	"eu-central-2":   {Point{47.37, 8.54}, "Switzerland · Zurich"},
	"eu-south-1":     {Point{45.46, 9.19}, "Italy · Milan"},
	"eu-south-2":     {Point{41.65, -0.89}, "Spain · Aragón"},
	"eu-north-1":     {Point{59.33, 18.07}, "Sweden · Stockholm"},
	"il-central-1":   {Point{32.09, 34.78}, "Israel · Tel Aviv"},
	"me-south-1":     {Point{26.23, 50.59}, "Bahrain"},
	"me-central-1":   {Point{25.20, 55.27}, "UAE"},
	"af-south-1":     {Point{-33.92, 18.42}, "South Africa · Cape Town"},
	"ap-south-1":     {Point{19.08, 72.88}, "India · Mumbai"},
	"ap-south-2":     {Point{17.39, 78.49}, "India · Hyderabad"},
	"ap-east-1":      {Point{22.32, 114.17}, "Hong Kong"},
	"ap-east-2":      {Point{25.03, 121.57}, "Taiwan · Taipei"},
	"ap-southeast-1": {Point{1.35, 103.82}, "Singapore"},
	"ap-southeast-2": {Point{-33.87, 151.21}, "Australia · Sydney"},
	"ap-southeast-3": {Point{-6.21, 106.85}, "Indonesia · Jakarta"},
	"ap-southeast-4": {Point{-37.81, 144.96}, "Australia · Melbourne"},
	"ap-southeast-5": {Point{3.14, 101.69}, "Malaysia"},
	"ap-southeast-6": {Point{-36.85, 174.76}, "New Zealand · Auckland"},
	"ap-southeast-7": {Point{13.76, 100.50}, "Thailand · Bangkok"},
	"ap-northeast-1": {Point{35.68, 139.69}, "Japan · Tokyo"},
	"ap-northeast-2": {Point{37.57, 126.98}, "South Korea · Seoul"},
	"ap-northeast-3": {Point{34.69, 135.50}, "Japan · Osaka"},
}

// LookupAWSRegion finds a region in the table.
func LookupAWSRegion(code string) (AWSRegion, bool) {
	r, ok := awsRegions[code]
	return r, ok
}

func tablePoint(code string) (Point, bool) {
	r, ok := awsRegions[code]
	return r.Point, ok
}

// Nearest is NearestWith over the shipped table.
func Nearest(p Point, cands []Candidate) (string, bool) {
	return NearestWith(p, cands, tablePoint)
}

// PlaceName is the table's place for awsRegion, or fallback (the bare
// placement code) for a region the table does not know.
func PlaceName(awsRegion, fallback string) string {
	if r, ok := awsRegions[awsRegion]; ok {
		return r.Place
	}
	return fallback
}