using MediatR;
using mws.backend.dotnet.application.Audit;
using mws.backend.dotnet.application.Auth;
using mws.backend.dotnet.application.Common;
using mws.backend.dotnet.application.Permissions;

namespace mws.backend.dotnet.application.Users;

public record ResetPasswordCommand(Guid ActorUserId, Guid Id, ResetPasswordRequest Request) : IRequest, IAuditableRequest
{
    public string Action => "User.ResetPassword";
    public string EntityType => "User";
    public Guid? EntityId => Id;
}

public class ResetPasswordHandler(IUnitOfWork uow, IPasswordHasher passwordHasher, IPermissionService permissions, IAuditContext auditContext)
    : IRequestHandler<ResetPasswordCommand>
{
    private const string Screen = "users";

    public async Task Handle(ResetPasswordCommand command, CancellationToken ct)
    {
        await permissions.EnsureAsync(command.ActorUserId, Screen, PermissionAction.Edit, ct);

        if (string.IsNullOrWhiteSpace(command.Request.NewPassword))
        {
            throw new BadRequestException("New password is required");
        }

        var user = await uow.Users.GetByIdAsync(command.Id, ct)
            ?? throw new NotFoundException("User not found");

        user.PasswordHash = passwordHasher.Hash(command.Request.NewPassword);
        user.UpdatedAt = DateTime.UtcNow;
        await uow.SaveChangesAsync(ct);

        auditContext.EntityName = user.Username;
    }
}