using LiteCharms.Infrastructure.Database;

namespace LiteCharms.Features.Notifications.Commands.Handlers;

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

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

            if(notification is null)
                return Result.Fail(new Error($"Notification with id {request.NotificationId} not found."));

            notification.Processed = request.Processed;

            return await context.SaveChangesAsync(cancellationToken) > 0
                ? Result.Ok()
                : Result.Fail(new Error($"Failed to update notification with id {request.NotificationId}."));
        }
		catch (Exception ex)
		{
            return Result.Fail(new Error(ex.Message).CausedBy(ex));
        }
    }
}