using LanguageExt.Common;
using MediatR;
using W542.GandalfReborn.Commands;
using W542.GandalfReborn.Data.Database.Repositories;
using W542.GandalfReborn.Data.Entities.Base;
using W542.GandalfReborn.Data.Entities.Subject;
using W542.GandalfReborn.Data.Entities.Subject.SignIn;
using W542.GandalfReborn.Data.Entities.Tenant;
using W542.GandalfReborn.Extensions;
using W542.GandalfReborn.Handlers.Security;

namespace W542.GandalfReborn.Handlers.Commands;

public class RegisterCommandHandler(ISubjectRepository subjectRepository, IMediator mediator) : IGrCommandHandler<RegisterCommand, Result<SubjectEntity>>
{
    public async Task<Result<SubjectEntity>> Handle(RegisterCommand command, CancellationToken cancellationToken)
    {
        var passwordHashResult = await mediator.Send(new HashPasswordCommand { RawPassword = command.Password }, cancellationToken);

        if (passwordHashResult.IsFaulted)
        {
            return passwordHashResult.AsErrorResult<SubjectEntity, string>();
        }

        var passwordHash = passwordHashResult.GetValue();

        var subject = new SubjectEntity
        {
            Visibility = EntityVisibility.Active,
            Name = command.Username,
            SignInMethods =
            [
                new SignInEntity
                {
                    Visibility = EntityVisibility.Active,
                    Method = SignInMethod.Simple,
                    IsLegacy = false,
                    PasswordHash = passwordHash,
                    Email = command.Email
                }
            ]
        };

        var upsertResult = await subjectRepository.Upsert(subject);

        return upsertResult;
    }
}