package usermod

import (
	"testing"
	"time"
)

func TestRenewVIPLevel(t *testing.T) {
	now := time.Date(2026, 8, 29, 12, 0, 0, 0, time.UTC)
	tests := []struct {
		name          string
		currentExpire time.Time
		currentLevel  int
		renewedLevel  int
		want          int
	}{
		{
			name:          "preserves active higher level",
			currentExpire: now.Add(24 * time.Hour),
			currentLevel:  3,
			renewedLevel:  1,
			want:          3,
		},
		{
			name:          "upgrades active lower level",
			currentExpire: now.Add(24 * time.Hour),
			currentLevel:  1,
			renewedLevel:  3,
			want:          3,
		},
		{
			name:          "uses renewed level after expiration",
			currentExpire: now.Add(-time.Second),
			currentLevel:  3,
			renewedLevel:  1,
			want:          1,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := RenewVIPLevel(tt.currentExpire, now, tt.currentLevel, tt.renewedLevel); got != tt.want {
				t.Fatalf("RenewVIPLevel() = %d, want %d", got, tt.want)
			}
		})
	}
}