package handlers_test

import (
	"testing"
	"time"

	"sneak.berlin/go/dnswatcher/internal/handlers"
)

func TestRelTime(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name string
		dur  time.Duration
		want string
	}{
		{"zero", 0, "never"},
		{"seconds", 30 * time.Second, "30s ago"},
		{"minutes", 5 * time.Minute, "5m ago"},
		{"hours", 2*time.Hour + 15*time.Minute, "2h 15m ago"},
		{"days", 48*time.Hour + 3*time.Hour, "2d 3h ago"},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			t.Parallel()

			var input time.Time
			if tt.dur > 0 {
				input = time.Now().Add(-tt.dur)
			}

			got := handlers.RelTime(input)
			if got != tt.want {
				t.Errorf(
					"RelTime(%v) = %q, want %q",
					tt.dur, got, tt.want,
				)
			}
		})
	}
}

func TestExpiryDays(t *testing.T) {
	t.Parallel()

	// 10 days from now.
	future := time.Now().Add(10 * 24 * time.Hour)

	days := handlers.ExpiryDays(future)
	if days < 9 || days > 10 {
		t.Errorf("expected ~10 days, got %d", days)
	}

	// Already expired.
	past := time.Now().Add(-24 * time.Hour)

	days = handlers.ExpiryDays(past)
	if days != 0 {
		t.Errorf("expected 0 for expired, got %d", days)
	}
}

func TestFormatRecords(t *testing.T) {
	t.Parallel()

	got := handlers.FormatRecords(nil)
	if got != "-" {
		t.Errorf("expected -, got %q", got)
	}

	got = handlers.FormatRecords(map[string][]string{
		"A": {"1.2.3.4"},
	})

	if got != "A: 1.2.3.4" {
		t.Errorf("unexpected format: %q", got)
	}
}