using FastEndpoints;
using GB5Shared.DTO.ECM;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.FastEndPoint;
using MaintenanceBLL.Claim;
using static GB5Shared.GB5Constant.Constant;

namespace MaintenanceSL.EndPoints.Claim
{
    // ObjectTypeId is hardcoded to OBJECTCLAIM server-side (IClaimBLL.UploadClaimDocumentAsync) —
    // never client-supplied — so this endpoint can't tag an attachment against an unrelated entity.
    public class UploadClaimDocument : BaseEndpoint<UploadClaimDocument.UploadClaimDocumentParameters, ResponseStandardDTO<object>>
    {
        private readonly IClaimBLL _ClaimBLL;

        public UploadClaimDocument(IClaimBLL claimBLL)
        {
            _ClaimBLL = claimBLL;
        }

        public record UploadClaimDocumentParameters(
            [property: FromHeader] string Login,
            [property: QueryParam] int ClaimId,
            [property: QueryParam] int DocumentSetDetailId,
            [property: QueryParam] string? Remarks,
            [property: QueryParam] string? Tags
        );

        public override void Configure()
        {
            Post("/Claim/UploadClaimDocument");
            AllowFileUploads();
            AllowAnonymous();
        }

        protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(
            UploadClaimDocumentParameters req,
            LoginDTO LoginDTO,
            CancellationToken ct)
        {
            try
            {
                var file = HttpContext.Request.Form.Files.FirstOrDefault();
                if (file is null || file.Length == 0)
                    throw new ArgumentException("No file provided or file is empty.");

                await using var stream = file.OpenReadStream();

                var uploadRequest = new AttachmentUploadRequest
                {
                    DocumentSetDetailId = req.DocumentSetDetailId,
                    Remarks = req.Remarks,
                    Tags = req.Tags ?? string.Empty
                };

                var result = await _ClaimBLL.UploadClaimDocumentAsync(
                    req.ClaimId, uploadRequest, stream, file.FileName, file.ContentType, LoginDTO!, ct);

                return await GB5Shared.ResponseStandard.Response.CreateSuccessResponse(
                    result,
                    CacheKeyLevel.NOT_REQUIRED,
                    LoginDTO);
            }
            catch (Exception ex)
            {
                return await GB5Shared.ResponseStandard.Response.CreateExceptionError<string>(
                    ex,
                    CacheKeyLevel.NOT_REQUIRED,
                    LoginDTO,
                    ex.Message,
                    500);
            }
        }
    }
}