using HrynCo.NotificationService.DAL.Abstract.Repositories;
using HrynCo.NotificationService.Services.Core;
using HrynCo.NotificationService.Services.Logging;
using static HrynCo.NotificationService.Services.Core.ServiceResultHelper;

namespace HrynCo.NotificationService.Services.TemplateDefinitions;

internal sealed class GetNotificationServiceHandler(
    IContextualSerilogLogger<GetNotificationServiceQuery> logger, INotificationServiceRepository services)
    : RequestHandler<GetNotificationServiceQuery, ServiceResult<NotificationServiceDto>>(logger)
{
    protected override async Task<ServiceResult<NotificationServiceDto>> DoOnHandle(GetNotificationServiceQuery request, CancellationToken cancellationToken)
    {
        if (request.ServiceId is null && string.IsNullOrWhiteSpace(request.Name))
            return Failure<NotificationServiceDto>("An exact service name is required.", ServiceErrorCode.InvalidRequest);
        var service = request.ServiceId is Guid id
            ? await services.GetAsync(id, cancellationToken)
            : await services.GetByNameAsync(request.Name!, cancellationToken);
        return service is null
            ? Failure<NotificationServiceDto>("Service not found.", ServiceErrorCode.NotFound)
            : Success(NotificationServiceMapping.Map(service));
    }
}