-- Planlama kararı: talep kaleminin planlanacak kalanından p_plan_quantity kadarını satınalmaya ya da iç transfere ayırır; kalanın geri kalanı
-- listede kalır. Planla diyaloğunun onayı (Prc_P_MaterialRequestPlanConfirm) her taslak plan satırı için çağırır.
-- Purchase: tedarikçinin talebin şubesi ve deposu için taslak teklif talebi varsa kalem ona eklenir (kalem zaten oradaysa miktarı artar), yoksa
-- talebin deposunun alım operasyon türüyle yeni taslak teklif talebi açılır (para birimi ve koşullar kontak kartından; alıcı — satınalma sorumlusu —
-- planlayan). Fiyat tedarikçinin fiyat listesinden gelir; teklif → sipariş → alım akışı oradan sürer.
-- Transfer: kaynak konumun serbest stoğu (Prc_V_MaterialRequestPlanSource) yetmelidir; aynı kaynak → talebin konumu için onaya
-- girmemiş taslak iç transfer varsa satır ona, yoksa kaynak deponun iç transfer operasyon türüyle yeni taslak açılır. Kalanın tamamı transferle
-- planlanan, satınalma payı olmayan kalem transfer belgesinin yeniden hesabında kapanır (Prc_P_MaterialRequestItemSync).
-- Stock: stok talebin teslim konumundadır; belge açılmaz, serbest stok yetmelidir. Miktar kalemin stoktan karşılanan ve teslim edilen
-- miktarına eklenir; satınalma payı olmayan ve kalanı biten kalem kapanır.
CREATE OR REPLACE PROCEDURE public."Prc_P_MaterialRequestPlan"(
    p_id uuid,
    p_plan_method varchar,
    p_plan_quantity numeric(18, 4),
    p_plan_supplier_id uuid,
    p_plan_source_location_id uuid,
    p_tenant_id uuid,
    p_last_modifier_id uuid
)
LANGUAGE plpgsql AS $$
DECLARE v_product uuid; v_uom varchar(64); v_due timestamp; v_reason varchar(256); v_branch uuid; v_warehouse uuid; v_location uuid;
        v_request_no varchar(32); v_remaining numeric(18, 4); v_doc uuid; v_line uuid; v_op_type uuid; v_src_warehouse uuid;
        v_free numeric(18, 4); v_no varchar(128);
BEGIN
  -- Kalem kilitlenir: aynı kalemin eşzamanlı iki planı kalanı iki kez dağıtamaz.
  SELECT i."ProductId", i."UomId", i."DueDate", i."RequestReason", r."BranchId", r."WarehouseId", r."LocationId", r."RequestNo"
    INTO v_product, v_uom, v_due, v_reason, v_branch, v_warehouse, v_location, v_request_no
    FROM "Prc_T_MaterialRequestItem" i
    INNER JOIN "Prc_T_MaterialRequest" r ON r."Id" = i."MaterialRequestId"
   WHERE i."Id" = p_id AND i."IsDeleted" = false AND i."LineStatus" = 'Waiting' AND r."IsDeleted" = false
     AND i."TenantId" IS NOT DISTINCT FROM p_tenant_id
     AND r."ApprovalStatus" IN ('Onaylandı', 'Teklif Talebi', 'Teklif Talebi Gönderildi', 'Satınalma Siparişi')
     FOR UPDATE OF i;
  IF v_product IS NULL THEN
    RAISE EXCEPTION 'Kalem planlanamaz: talep onaylı değil ya da kalem kapalı.' USING ERRCODE = 'P0001', DETAIL = '50191';
  END IF;

  SELECT "RemainingQuantity" INTO v_remaining FROM public."Prc_V_MaterialRequestItemPlan" WHERE "Id" = p_id;
  IF COALESCE(p_plan_quantity, 0) <= 0 THEN
    RAISE EXCEPTION 'Plan miktarı sıfırdan büyük olmalıdır.' USING ERRCODE = 'P0001', DETAIL = '50192';
  END IF;
  IF p_plan_quantity > v_remaining THEN
    RAISE EXCEPTION 'Plan miktarı planlanacak kalanı aşamaz (kalan: % %).', trim_scale(v_remaining), v_uom USING ERRCODE = 'P0001', DETAIL = '50193';
  END IF;

  IF p_plan_method = 'Purchase' THEN
    IF p_plan_supplier_id IS NULL THEN
      RAISE EXCEPTION 'Satınalma kararında tedarikçi seçilmelidir.' USING ERRCODE = 'P0001', DETAIL = '50194';
    END IF;

    SELECT "Id" INTO v_doc
      FROM "Prc_T_PurchaseRfq"
     WHERE "IsDeleted" = false AND "Status" = 'Draft' AND "SupplierId" = p_plan_supplier_id AND "BranchId" = v_branch AND "WarehouseId" = v_warehouse
       AND "TenantId" IS NOT DISTINCT FROM p_tenant_id
     ORDER BY "CreationTime" DESC
     LIMIT 1;

    IF v_doc IS NULL THEN
      SELECT "Id" INTO v_op_type
        FROM "Inv_T_OperationType"
       WHERE "IsDeleted" = false AND "IsActive" = true AND "OperationKind" = 'Receipt' AND "WarehouseId" = v_warehouse
       ORDER BY "Name"
       LIMIT 1;
      IF v_op_type IS NULL THEN
        RAISE EXCEPTION 'Talebin deposu için aktif bir alım operasyon türü tanımlı değil.' USING ERRCODE = 'P0001', DETAIL = '50195';
      END IF;

      v_doc := gen_random_uuid();
      CALL public."Adm_P_SequenceNext"('Prc.PurchaseRfq', p_tenant_id, v_no);
      INSERT INTO "Prc_T_PurchaseRfq" ("Id", "TenantId", "RfqNo", "TenderGroupId", "SupplierId", "BranchId", "OperationTypeId", "WarehouseId", "CurrencyId",
             "BuyerUserId", "IncotermId", "IncotermLocation", "PaymentTermId", "CreationTime", "CreatorId", "IsDeleted")
      SELECT v_doc, p_tenant_id, left(v_no, 32), v_doc, c."Id", v_branch, v_op_type, v_warehouse, COALESCE(c."SupplierCurrency", 'TRY'),
             p_last_modifier_id, c."PurchaseIncotermId", c."PurchaseIncotermLocation", c."PurchasePaymentTermId",
             NOW() AT TIME ZONE 'UTC', p_last_modifier_id, false
        FROM "Adm_T_Contact" c
       WHERE c."Id" = p_plan_supplier_id AND c."IsDeleted" = false;
      IF NOT FOUND THEN
        RAISE EXCEPTION 'Satınalma kararında tedarikçi seçilmelidir.' USING ERRCODE = 'P0001', DETAIL = '50194';
      END IF;
    END IF;

    SELECT "Id" INTO v_line FROM "Prc_T_PurchaseRfqLine" WHERE "PurchaseRfqId" = v_doc AND "MaterialRequestItemId" = p_id AND "IsDeleted" = false LIMIT 1;
    IF v_line IS NOT NULL THEN
      UPDATE "Prc_T_PurchaseRfqLine"
         SET "Quantity" = "Quantity" + public."Inv_F_UomConvert"(p_plan_quantity, v_uom, "UomId"),
             "LastModificationTime" = NOW() AT TIME ZONE 'UTC', "LastModifierId" = p_last_modifier_id
       WHERE "Id" = v_line;
    ELSE
      INSERT INTO "Prc_T_PurchaseRfqLine" ("Id", "TenantId", "PurchaseRfqId", "ProductId", "Description", "Quantity", "UomId", "UnitPrice", "TaxRate", "Amount",
             "DeliveryDate", "MaterialRequestItemId", "CreationTime", "CreatorId", "IsDeleted")
      SELECT gen_random_uuid(), p_tenant_id, v_doc, v_product, v_reason, p_plan_quantity, v_uom,
             COALESCE((SELECT ps."Price" FROM "Inv_T_ProductSupplier" ps
                        WHERE ps."ProductId" = v_product AND ps."ContactId" = p_plan_supplier_id AND ps."IsDeleted" = false
                        ORDER BY ps."MinQuantity" LIMIT 1), 0),
             COALESCE(p."PurchaseTaxRate", 0), 0, v_due, p_id, NOW() AT TIME ZONE 'UTC', p_last_modifier_id, false
        FROM "Inv_T_Product" p
       WHERE p."Id" = v_product;
    END IF;

    CALL public."Prc_P_PurchaseRfqRecalc"(v_doc);
  ELSIF p_plan_method = 'Transfer' THEN
    IF p_plan_source_location_id IS NULL THEN
      RAISE EXCEPTION 'İç transfer kararında kaynak konum seçilmelidir.' USING ERRCODE = 'P0001', DETAIL = '50196';
    END IF;
    -- Konum ve serbest stok kuralı diyaloğun İç Transfer ızgarasıyla aynıdır.
    SELECT "WarehouseId", "FreeQuantity" INTO v_src_warehouse, v_free
      FROM public."Prc_V_MaterialRequestPlanSource"
     WHERE "BaseId" = p_id AND "LocationId" = p_plan_source_location_id;
    IF v_src_warehouse IS NULL OR p_plan_source_location_id = v_location THEN
      RAISE EXCEPTION 'Kaynak konum, talebin teslim konumundan farklı ve ürünün stoğu olan bir iç konum olmalıdır.' USING ERRCODE = 'P0001', DETAIL = '50197';
    END IF;
    IF p_plan_quantity > v_free THEN
      RAISE EXCEPTION 'Kaynak konumda yeterli serbest stok yok (serbest: % %).', trim_scale(GREATEST(v_free, 0)), v_uom USING ERRCODE = 'P0001', DETAIL = '50198';
    END IF;

    SELECT "Id" INTO v_doc
      FROM "Inv_T_Transfer"
     WHERE "IsDeleted" = false AND "OperationKind" = 'InternalTransfer' AND "Status" = 'Draft' AND "ReturnOfId" IS NULL AND "BackorderOfId" IS NULL
       AND "SourceLocationId" = p_plan_source_location_id AND "DestinationLocationId" = v_location
       AND COALESCE("ApprovalStatus", 'Onay Gerekmez') = 'Onay Gerekmez'
       AND "TenantId" IS NOT DISTINCT FROM p_tenant_id
     ORDER BY "CreationTime" DESC
     LIMIT 1;

    IF v_doc IS NULL THEN
      SELECT "Id" INTO v_op_type
        FROM "Inv_T_OperationType"
       WHERE "IsDeleted" = false AND "IsActive" = true AND "OperationKind" = 'InternalTransfer' AND "WarehouseId" = v_src_warehouse
       ORDER BY "Name"
       LIMIT 1;
      IF v_op_type IS NULL THEN
        RAISE EXCEPTION 'Kaynak depo için aktif bir iç transfer operasyon türü tanımlı değil.' USING ERRCODE = 'P0001', DETAIL = '50199';
      END IF;

      v_doc := gen_random_uuid();
      INSERT INTO "Inv_T_Transfer" ("Id", "TenantId", "BranchId", "WarehouseId", "OperationTypeId", "OperationKind", "SourceLocationId", "DestinationLocationId",
             "SourceDocument", "ResponsibleUserId", "Status", "CreationTime", "CreatorId", "IsDeleted")
      SELECT v_doc, p_tenant_id, ot."BranchId", ot."WarehouseId", ot."Id", 'InternalTransfer', p_plan_source_location_id, v_location,
             v_request_no, p_last_modifier_id, 'Draft', NOW() AT TIME ZONE 'UTC', p_last_modifier_id, false
        FROM "Inv_T_OperationType" ot
       WHERE ot."Id" = v_op_type;
    ELSE
      UPDATE "Inv_T_Transfer"
         SET "SourceDocument" = left(COALESCE("SourceDocument", '') || CASE WHEN COALESCE("SourceDocument", '') = '' THEN '' ELSE ', ' END || v_request_no, 128)
       WHERE "Id" = v_doc AND strpos(COALESCE("SourceDocument", ''), v_request_no) = 0;
    END IF;

    SELECT "Id" INTO v_line FROM "Inv_T_TransferLine" WHERE "TransferId" = v_doc AND "MaterialRequestItemId" = p_id AND "IsDeleted" = false LIMIT 1;
    IF v_line IS NOT NULL THEN
      UPDATE "Inv_T_TransferLine"
         SET "DemandQuantity" = "DemandQuantity" + public."Inv_F_UomConvert"(p_plan_quantity, v_uom, "UomId"),
             "LastModificationTime" = NOW() AT TIME ZONE 'UTC', "LastModifierId" = p_last_modifier_id
       WHERE "Id" = v_line;
    ELSE
      INSERT INTO "Inv_T_TransferLine" ("Id", "TenantId", "TransferId", "ProductId", "Description", "DemandQuantity", "Quantity", "UomId", "MaterialRequestItemId",
             "CreationTime", "CreatorId", "IsDeleted")
      VALUES (gen_random_uuid(), p_tenant_id, v_doc, v_product, v_reason, p_plan_quantity, 0, v_uom, p_id, NOW() AT TIME ZONE 'UTC', p_last_modifier_id, false);
    END IF;

    -- Numara, kaynak depo onaycısı ve yeniden hesap (kalemin kapanması dahil) belge kaydı sonrasıyla aynıdır.
    CALL public."Inv_P_TransferAfterSave"(v_doc, p_last_modifier_id);
  ELSIF p_plan_method = 'Stock' THEN
    SELECT "FreeQuantity" INTO v_free FROM public."Prc_V_MaterialRequestPlanSource" WHERE "BaseId" = p_id AND "LocationId" = v_location;
    IF p_plan_quantity > COALESCE(v_free, 0) THEN
      RAISE EXCEPTION 'Teslim konumunda yeterli serbest stok yok (serbest: % %).', trim_scale(GREATEST(COALESCE(v_free, 0), 0)), v_uom
        USING ERRCODE = 'P0001', DETAIL = '50198';
    END IF;

    UPDATE "Prc_T_MaterialRequestItem"
       SET "FromStockQuantity" = "FromStockQuantity" + p_plan_quantity, "DeliveredQuantity" = "DeliveredQuantity" + p_plan_quantity,
           "LastModificationTime" = NOW() AT TIME ZONE 'UTC', "LastModifierId" = p_last_modifier_id
     WHERE "Id" = p_id;
    UPDATE "Prc_T_MaterialRequestItem" i SET "LineStatus" = 'Done'
      FROM public."Prc_V_MaterialRequestItemPlan" p
     WHERE p."Id" = i."Id" AND i."Id" = p_id AND p."PurchaseQuantity" = 0 AND p."RemainingQuantity" <= 0;
  ELSE
    RAISE EXCEPTION 'Karar Satınalma, İç Transfer ya da Stoktan olmalıdır.' USING ERRCODE = 'P0001', DETAIL = '50192';
  END IF;
END;
$$;