using App.Core.Services.Licensing;

namespace App.Core.Tests.Licensing;

public class TrialStateTests
{
    [Fact]
    public void GetDaysRemaining_OnInstallDay_Returns30()
    {
        var installDate = new DateTime(2026, 1, 1, 0, 0, 0, DateTimeKind.Utc);
        var state = new TrialState(installDate, "hash", installDate);

        Assert.Equal(30, state.GetDaysRemaining(installDate));
    }

    [Fact]
    public void GetDaysRemaining_AfterFifteenDays_Returns15()
    {
        var installDate = new DateTime(2026, 1, 1, 0, 0, 0, DateTimeKind.Utc);
        var state = new TrialState(installDate, "hash", installDate);

        Assert.Equal(15, state.GetDaysRemaining(installDate.AddDays(15)));
    }

    [Fact]
    public void GetDaysRemaining_NeverGoesNegative()
    {
        var installDate = new DateTime(2026, 1, 1, 0, 0, 0, DateTimeKind.Utc);
        var state = new TrialState(installDate, "hash", installDate);

        Assert.Equal(0, state.GetDaysRemaining(installDate.AddDays(90)));
    }

    [Fact]
    public void IsExpired_ExactlyOnDay30_IsTrue()
    {
        var installDate = new DateTime(2026, 1, 1, 0, 0, 0, DateTimeKind.Utc);
        var state = new TrialState(installDate, "hash", installDate);

        Assert.True(state.IsExpired(installDate.AddDays(30)));
        Assert.False(state.IsExpired(installDate.AddDays(29)));
    }

    [Fact]
    public void WithUpdatedLastRun_DoesNotChangeInstallDate()
    {
        var installDate = new DateTime(2026, 1, 1, 0, 0, 0, DateTimeKind.Utc);
        var state = new TrialState(installDate, "hash", installDate);

        var updated = state.WithUpdatedLastRun(installDate.AddDays(5));

        Assert.Equal(installDate, updated.InstallDateUtc);
        Assert.Equal(installDate.AddDays(5), updated.LastRunTimestampUtc);
    }
}