using AutoMapper;
using LanguageExt.Common;
using Microsoft.AspNetCore.Identity;
using W542.GandalfReborn.Commands;
using W542.GandalfReborn.Data.Database.Repositories;
using W542.GandalfReborn.Data.Dto;
using W542.GandalfReborn.Data.Entities.Security;
using W542.GandalfReborn.Handlers.Commands;

namespace W542.GandalfReborn.Handlers.Security;

public class CreateAuthCodeCommandHandler(IPasswordHasher<object> passwordHasher, TimeProvider timeProvider, IAuthCodeRepository authCodeRepository, IMapper mapper) : IGrCommandHandler<CreateAuthCodeCommand, Result<AuthCodeDto>>
{
    private static readonly object MicrosoftIsAMeme = new();

    public async Task<Result<AuthCodeDto>> Handle(CreateAuthCodeCommand command, CancellationToken cancellationToken)
    {
        var code = passwordHasher.HashPassword(MicrosoftIsAMeme, command.SubjectId.ToString());
        var expiresAt = timeProvider.GetUtcNow().AddMinutes(5);

        var authCodeEntity = new AuthCodeEntity
        {
            SubjectId = command.SubjectId,
            Expiration = expiresAt,
            IsRevoked = false,
            Code = code,
            Challenge = command.CodeChallenge,
            Algorithm = command.Algorithm,
        };

        var insertedAuthCodeEntity = await authCodeRepository.Upsert(authCodeEntity);

        return insertedAuthCodeEntity.Match(
            success => mapper.Map<AuthCodeDto>(success),
            fail => new Result<AuthCodeDto>(fail)
        );
    }
}