using LiteCharms.Extensions;
using LiteCharms.Infrastructure.Database;
using LiteCharms.Models;

namespace LiteCharms.Features.Notifications.Queries.Handlers;

public class GetNotificationQueryHandler(IDbContextFactory<ShopDbContext> contextFactory) : IRequestHandler<GetNotificationQuery, Result<Notification>>
{
    public async ValueTask<Result<Notification>> Handle(GetNotificationQuery request, CancellationToken cancellationToken)
    {
        try
        {
            await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);

            var notification = await context.Notifications.FirstOrDefaultAsync(n => n.Id == request.NotificationId, cancellationToken);

            return notification is not null 
                ? Result.Ok(notification.ToModel())
                : Result.Fail<Notification>(new Error($"Notification with id {request.NotificationId} not found"));
        }
        catch (Exception ex)
        {
            return Result.Fail<Notification>(new Error(ex.Message).CausedBy(ex));
        }
    }
}