using LiteCharms.Features.Shop.Postgres;

namespace LiteCharms.Features.CartPackages.Commands.Handlers;

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

            if (await context.Packages.AnyAsync(p => p.Name == request.Name, cancellationToken))
                return Result.Fail($"A package by the same name already exists: {request.Name}");

            var newPackage = context.Packages.Add(new Entities.Package
            {
                Name = request.Name,
                Description = request.Description,
                Active = true
            });

            return await context.SaveChangesAsync(cancellationToken) > 0
                ? Result.Ok(newPackage.Entity.Id)
                : Result.Fail($"Failed to create a new package by the name: {request.Name}");
        }
        catch (Exception ex)
        {
            return Result.Fail<Guid>(new Error(ex.Message).CausedBy(ex));
        }
    }
}