package briefing

import "testing"

func TestWindDirectionLabelUsesSixteenPointCompass(t *testing.T) {
	tests := []struct {
		name    string
		degrees *float64
		want    string
	}{
		{name: "nil", degrees: nil, want: ""},
		{name: "north", degrees: floatPtr(0), want: "N"},
		{name: "below first boundary", degrees: floatPtr(11.24), want: "N"},
		{name: "at first boundary", degrees: floatPtr(11.25), want: "NNE"},
		{name: "northeast", degrees: floatPtr(45), want: "NE"},
		{name: "south", degrees: floatPtr(180), want: "S"},
		{name: "wrap to north", degrees: floatPtr(348.75), want: "N"},
		{name: "full rotation", degrees: floatPtr(360), want: "N"},
		{name: "negative normalizes", degrees: floatPtr(-45), want: "NW"},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := windDirectionLabel(tt.degrees); got != tt.want {
				t.Fatalf("windDirectionLabel(%v) = %q, want %q", tt.degrees, got, tt.want)
			}
		})
	}
}

func TestWindDirectionTextLabelUsesLowercaseCompassText(t *testing.T) {
	tests := []struct {
		name    string
		degrees *float64
		want    string
	}{
		{name: "nil", degrees: nil, want: ""},
		{name: "north", degrees: floatPtr(0), want: "north"},
		{name: "north northeast", degrees: floatPtr(11.25), want: "north-northeast"},
		{name: "northwest", degrees: floatPtr(315), want: "northwest"},
		{name: "negative normalizes", degrees: floatPtr(-45), want: "northwest"},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := windDirectionTextLabel(tt.degrees); got != tt.want {
				t.Fatalf("windDirectionTextLabel(%v) = %q, want %q", tt.degrees, got, tt.want)
			}
		})
	}
}