using QuestionsApi.Models;
using QuestionsApi.Services;
using Xunit;

namespace QuestionsApi.Tests;

public sealed class QuestionStoreTests
{
    [Fact]
    public void ApplyMediaReviewGate_FlagsUnflaggedQuestionWithMedia()
    {
        var question = new Question { Media = ["asset-1"] };

        QuestionStore.ApplyMediaReviewGate(question);

        Assert.NotNull(question.FlaggedForReviewUtc);
        Assert.Equal("system", question.FlaggedByUserId);
        Assert.False(string.IsNullOrWhiteSpace(question.FlagReason));
    }

    [Fact]
    public void ApplyMediaReviewGate_LeavesMediaFreeQuestionsAlone()
    {
        var question = new Question { Media = [] };

        QuestionStore.ApplyMediaReviewGate(question);

        Assert.Null(question.FlaggedForReviewUtc);
    }

    [Fact]
    public void ApplyMediaReviewGate_DoesNotOverwriteAnExistingFlag()
    {
        var flaggedAt = DateTime.UtcNow.AddDays(-1);
        var question = new Question
        {
            Media = ["asset-1"],
            FlaggedForReviewUtc = flaggedAt,
            FlagReason = "Reported by student",
            FlaggedByUserId = "user-42"
        };

        QuestionStore.ApplyMediaReviewGate(question);

        Assert.Equal(flaggedAt, question.FlaggedForReviewUtc);
        Assert.Equal("Reported by student", question.FlagReason);
        Assert.Equal("user-42", question.FlaggedByUserId);
    }
}