package common

import (
	"testing"
	"time"
)

func TestIsInactivePromoEligible(t *testing.T) {
	now := time.Date(2026, time.May, 27, 12, 0, 0, 0, time.UTC)

	tests := []struct {
		name     string
		expireAt time.Time
		want     bool
	}{
		{
			name:     "expired before inactive threshold is eligible",
			expireAt: now.AddDate(0, -4, 0),
			want:     true,
		},
		{
			name:     "expired exactly at inactive threshold is eligible",
			expireAt: now.AddDate(0, -3, 0),
			want:     true,
		},
		{
			name:     "recently expired subscription is not eligible",
			expireAt: now.AddDate(0, -2, 0),
			want:     false,
		},
		{
			name:     "active future subscription is not eligible",
			expireAt: now.Add(time.Hour),
			want:     false,
		},
		{
			name:     "permanent subscription marker is not eligible",
			expireAt: time.UnixMilli(0),
			want:     false,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got := isInactivePromoEligible(tt.expireAt, now, 3)
			if got != tt.want {
				t.Fatalf("isInactivePromoEligible() = %v, want %v", got, tt.want)
			}
		})
	}
}