using QuestionsApi.Models;
using Xunit;

namespace QuestionsApi.Tests;

public sealed class UserNotepadTests
{
    [Fact]
    public void ValidatorAcceptsPlainTextAtMaximumLength()
    {
        var request = new UpdateUserNotepadRequest
        {
            Content = new string('x', UserNotepadValidator.MaxContentLength),
            ExpectedRevision = 0
        };

        Assert.Null(UserNotepadValidator.Validate(request));
    }

    [Fact]
    public void ValidatorRejectsOversizedContentAndNegativeRevision()
    {
        var oversized = new UpdateUserNotepadRequest
        {
            Content = new string('x', UserNotepadValidator.MaxContentLength + 1),
            ExpectedRevision = 0
        };
        Assert.Contains("characters or fewer", UserNotepadValidator.Validate(oversized));

        var invalidRevision = new UpdateUserNotepadRequest { ExpectedRevision = -1 };
        Assert.Contains("cannot be negative", UserNotepadValidator.Validate(invalidRevision));
    }

    [Fact]
    public void ResponseDoesNotExposeUserOrMongoIdentifiers()
    {
        var response = UserNotepadResponse.FromModel(new UserNotepad
        {
            UserId = "private-user-id",
            Content = "My notes",
            Revision = 7
        });

        Assert.Equal("My notes", response.Content);
        Assert.Equal(7, response.Revision);
        Assert.Null(typeof(UserNotepadResponse).GetProperty(nameof(UserNotepad.UserId)));
        Assert.Null(typeof(UserNotepadResponse).GetProperty(nameof(UserNotepad.Id)));
    }
}