using LiteCharms.Infrastructure.Database;

namespace LiteCharms.Features.CartPackages.Commands.Handlers;

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

            if (!await context.Packages.AnyAsync(p => p.Id == request.PackageId, cancellationToken))
                return Result.Fail($"Could not find package by ID {request.PackageId}");

            var items = await context.PackageItems.Where(i => i.PackageId == request.PackageId).ToArrayAsync(cancellationToken);

            context.PackageItems.RemoveRange(items);

            return await context.SaveChangesAsync(cancellationToken) > 0
                ? Result.Ok()
                : Result.Fail($"Failed to delete package {request.PackageId} items");
        }
        catch (Exception ex)
        {
            return Result.Fail(new Error(ex.Message).CausedBy(ex));
        }
    }
}