using SeaHaven.DataServices.Interfaces;

namespace SeaHaven.Services.Helpers
{
    public static class WorkOrderUpliftEvidenceAssociation
    {
        public static IReadOnlyList<int> Normalize(int? single, IEnumerable<int>? many)
        {
            var ids = new List<int>();
            if (single is int one && one > 0)
                ids.Add(one);

            if (many == null)
                return ids;

            foreach (var id in many)
            {
                if (id > 0 && !ids.Contains(id))
                    ids.Add(id);
            }

            return ids;
        }

        public static async Task RequirePassedAsync(
            IVendorDocumentDataService documents,
            IReadOnlyList<int> documentIds,
            int dispatchId,
            int vendorId,
            CancellationToken cancellationToken)
        {
            foreach (var documentId in documentIds)
            {
                var evidence = await documents.GetUpliftEvidenceAsync(
                    documentId,
                    dispatchId,
                    vendorId,
                    cancellationToken);
                if (evidence == null)
                {
                    throw new InvalidOperationException(
                        "The selected evidence document is not available or has not passed scanning");
                }
            }
        }
    }
}