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

namespace HrynCo.NotificationService.Services.EmailTemplates.Get;

internal sealed class GetEmailTemplateHandler
    : RequestHandler<GetEmailTemplateQuery, ServiceResult<EmailTemplate>>
{
    private readonly IEmailTemplateRepository _templates;

    public GetEmailTemplateHandler(
        IContextualSerilogLogger<GetEmailTemplateQuery> logger,
        IUnitOfWork unitOfWork,
        IEmailTemplateRepository templates)
        : base(logger, unitOfWork)
    {
        _templates = templates;
    }

    protected override async Task<ServiceResult<EmailTemplate>> DoOnHandle(
        GetEmailTemplateQuery request, CancellationToken cancellationToken)
    {
        var template = await _templates.GetAsync(
            request.ServiceName, request.Key, request.LanguageCode, cancellationToken);

        return template is null
            ? Failure<EmailTemplate>("Template not found.", ServiceErrorCode.NotFound)
            : Success(template);
    }
}