refactor: extract offers business logic into offers.service.ts

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/routes/admin/quotations.ts

@@ -1,75 +1,39 @@
 import { FastifyInstance } from 'fastify';
-import prisma from '../../config/database';
 import { requirePermission } from '../../middleware/auth';
 import { logAudit } from '../../services/audit';
 import { success, error, parseId } from '../../utils/response';
 import { parsePagination, buildPaginationMeta } from '../../utils/pagination';
 import { parseBody } from '../../schemas/common';
 import { CreateQuotationSchema, UpdateQuotationSchema } from '../../schemas/offers.schema';
-import { generateOfferNumber } from '../../services/numbering.service';
+import {
+  listOffers,
+  getOffer,
+  createOffer,
+  updateOffer,
+  deleteOffer,
+  duplicateOffer,
+  invalidateOffer,
+  getNextOfferNumber,
+} from '../../services/offers.service';
 
 
-interface QuotationItemInput { description?: string; item_description?: string; quantity?: number; unit?: string; unit_price?: number; is_included_in_total?: boolean; position?: number }
-interface ScopeSectionInput { title?: string; title_cz?: string; content?: string; position?: number }
-
-const ALLOWED_SORT_FIELDS = ['id', 'quotation_number', 'project_code', 'created_at', 'valid_until', 'currency', 'status'];
-
 export default async function quotationsRoutes(fastify: FastifyInstance): Promise<void> {
   fastify.get('/', { preHandler: requirePermission('offers.view') }, async (request, reply) => {
     const query = request.query as Record<string, unknown>;
     const { page, limit, skip, sort, order, search } = parsePagination(query);
-    const sortField = ALLOWED_SORT_FIELDS.includes(sort) ? sort : 'id';
 
-    const where: Record<string, unknown> = {};
+    const result = await listOffers({
-    if (query.status) where.status = String(query.status);
+      page, limit, skip, sort, order, search,
-    if (query.customer_id) where.customer_id = Number(query.customer_id);
+      status: query.status ? String(query.status) : undefined,
-    if (search) {
+      customer_id: query.customer_id ? Number(query.customer_id) : undefined,
-      where.OR = [
-        { quotation_number: { contains: search } },
-        { project_code: { contains: search } },
-        { customers: { name: { contains: search } } },
-      ];
-    }
-
-    const [quotations, total] = await Promise.all([
-      prisma.quotations.findMany({
-        where,
-        skip,
-        take: limit,
-        orderBy: { [sortField]: order },
-        include: {
-          customers: { select: { id: true, name: true } },
-          quotation_items: { orderBy: { position: 'asc' } },
-          scope_sections: { orderBy: { position: 'asc' } },
-        },
-      }),
-      prisma.quotations.count({ where }),
-    ]);
-
-    // Compute totals and map relation names
-    const enriched = quotations.map(q => {
-      const subtotal = q.quotation_items
-        .filter(i => i.is_included_in_total !== false)
-        .reduce((s, i) => s + (Number(i.quantity) || 0) * (Number(i.unit_price) || 0), 0);
-      const vatAmount = q.apply_vat ? subtotal * ((Number(q.vat_rate) || 21) / 100) : 0;
-      const { quotation_items, scope_sections, ...rest } = q;
-      return {
-        ...rest,
-        items: quotation_items,
-        sections: scope_sections,
-        customer_name: q.customers?.name || null,
-        subtotal: Math.round(subtotal * 100) / 100,
-        vat_amount: Math.round(vatAmount * 100) / 100,
-        total: Math.round((subtotal + vatAmount) * 100) / 100,
-      };
     });
 
-    return reply.send({ success: true, data: enriched, pagination: buildPaginationMeta(total, page, limit) });
+    return reply.send({ success: true, data: result.data, pagination: buildPaginationMeta(result.total, page, limit) });
   });
 
   // GET /api/admin/offers/next-number
   fastify.get('/next-number', { preHandler: requirePermission('offers.create') }, async (_request, reply) => {
-    const number = await generateOfferNumber();
+    const number = await getNextOfferNumber();
     return success(reply, { number, next_number: number });
   });
 
@@ -77,70 +41,22 @@ export default async function quotationsRoutes(fastify: FastifyInstance): Promis
   fastify.post<{ Params: { id: string } }>('/:id/duplicate', { preHandler: requirePermission('offers.create') }, async (request, reply) => {
     const id = parseId(request.params.id, reply);
     if (id === null) return;
-    const original = await prisma.quotations.findUnique({
-      where: { id },
-      include: { quotation_items: { orderBy: { position: 'asc' } }, scope_sections: { orderBy: { position: 'asc' } } },
-    });
-    if (!original) return error(reply, 'Nabídka nenalezena', 404);
 
-    const nextOfferNumber = await generateOfferNumber();
+    const result = await duplicateOffer(id);
+    if (!result) return error(reply, 'Nabídka nenalezena', 404);
 
-    const copy = await prisma.quotations.create({
+    await logAudit({ request, authData: request.authData, action: 'create', entityType: 'quotation', entityId: result.copy.id, description: `Duplikována nabídka ${result.original.quotation_number} → ${result.copy.quotation_number}` });
-      data: {
+    return success(reply, { id: result.copy.id, quotation_number: result.copy.quotation_number }, 201, 'Nabídka byla duplikována');
-        quotation_number: nextOfferNumber,
-        project_code: original.project_code,
-        customer_id: original.customer_id,
-        valid_until: null,
-        currency: original.currency,
-        language: original.language,
-        vat_rate: original.vat_rate,
-        apply_vat: original.apply_vat,
-        exchange_rate: original.exchange_rate,
-        status: 'active',
-        scope_title: original.scope_title,
-        scope_description: original.scope_description,
-      },
-    });
-
-    if (original.quotation_items.length > 0) {
-      await prisma.quotation_items.createMany({
-        data: original.quotation_items.map((item) => ({
-          quotation_id: copy.id,
-          description: item.description,
-          item_description: item.item_description,
-          quantity: item.quantity,
-          unit: item.unit,
-          unit_price: item.unit_price,
-          is_included_in_total: item.is_included_in_total,
-          position: item.position,
-        })),
-      });
-    }
-
-    if (original.scope_sections.length > 0) {
-      await prisma.scope_sections.createMany({
-        data: original.scope_sections.map((s) => ({
-          quotation_id: copy.id,
-          title: s.title,
-          title_cz: s.title_cz,
-          content: s.content,
-          position: s.position,
-        })),
-      });
-    }
-
-    await logAudit({ request, authData: request.authData, action: 'create', entityType: 'quotation', entityId: copy.id, description: `Duplikována nabídka ${original.quotation_number} → ${copy.quotation_number}` });
-    return success(reply, { id: copy.id, quotation_number: copy.quotation_number }, 201, 'Nabídka byla duplikována');
   });
 
   // POST /api/admin/offers/:id/invalidate
   fastify.post<{ Params: { id: string } }>('/:id/invalidate', { preHandler: requirePermission('offers.edit') }, async (request, reply) => {
     const id = parseId(request.params.id, reply);
     if (id === null) return;
-    const existing = await prisma.quotations.findUnique({ where: { id } });
+
+    const existing = await invalidateOffer(id);
     if (!existing) return error(reply, 'Nabídka nenalezena', 404);
 
-    await prisma.quotations.update({ where: { id }, data: { status: 'invalidated', modified_at: new Date() } });
     await logAudit({ request, authData: request.authData, action: 'update', entityType: 'quotation', entityId: id, description: `Zneplatněna nabídka ${existing.quotation_number}` });
     return success(reply, null, 200, 'Nabídka zneplatněna');
   });
@@ -148,85 +64,18 @@ export default async function quotationsRoutes(fastify: FastifyInstance): Promis
   fastify.get<{ Params: { id: string } }>('/:id', { preHandler: requirePermission('offers.view') }, async (request, reply) => {
     const id = parseId(request.params.id, reply);
     if (id === null) return;
-    const quotation = await prisma.quotations.findUnique({
-      where: { id },
-      include: {
-        customers: true,
-        quotation_items: { orderBy: { position: 'asc' } },
-        scope_sections: { orderBy: { position: 'asc' } },
-      },
-    });
-    if (!quotation) return error(reply, 'Nabídka nenalezena', 404);
 
-    // Fetch linked order if exists
+    const data = await getOffer(id);
-    let orderInfo = null;
+    if (!data) return error(reply, 'Nabídka nenalezena', 404);
-    if (quotation.order_id) {
-      const order = await prisma.orders.findUnique({
-        where: { id: quotation.order_id },
-        select: { id: true, order_number: true, status: true },
-      });
-      orderInfo = order;
-    }
 
-    const { quotation_items, scope_sections, ...rest } = quotation;
+    return success(reply, data);
-    return success(reply, {
-      ...rest,
-      items: quotation_items,
-      sections: scope_sections,
-      customer: quotation.customers,
-      customer_name: quotation.customers?.name || null,
-      order: orderInfo,
-    });
   });
 
   fastify.post('/', { preHandler: requirePermission('offers.create') }, async (request, reply) => {
     const parsed = parseBody(CreateQuotationSchema, request.body);
     if ('error' in parsed) return error(reply, parsed.error, 400);
-    const body = parsed.data;
 
-    const quotation = await prisma.quotations.create({
+    const quotation = await createOffer(parsed.data);
-      data: {
-        quotation_number: body.quotation_number ? String(body.quotation_number) : null,
-        project_code: body.project_code ? String(body.project_code) : null,
-        customer_id: body.customer_id ? Number(body.customer_id) : null,
-        valid_until: body.valid_until ? new Date(String(body.valid_until)) : null,
-        currency: body.currency ? String(body.currency) : 'CZK',
-        language: body.language ? String(body.language) : 'cs',
-        vat_rate: body.vat_rate ? Number(body.vat_rate) : 21.0,
-        apply_vat: body.apply_vat !== false,
-        exchange_rate: body.exchange_rate ? Number(body.exchange_rate) : 1.0,
-        status: body.status ? String(body.status) : 'active',
-        scope_title: body.scope_title ? String(body.scope_title) : null,
-        scope_description: body.scope_description ? String(body.scope_description) : null,
-      },
-    });
-
-    if (Array.isArray(body.items)) {
-      await prisma.quotation_items.createMany({
-        data: (body.items as QuotationItemInput[]).map((item, i) => ({
-          quotation_id: quotation.id,
-          description: item.description ?? null,
-          item_description: item.item_description ?? null,
-          quantity: item.quantity ?? 1,
-          unit: item.unit ?? null,
-          unit_price: item.unit_price ?? 0,
-          is_included_in_total: item.is_included_in_total !== false,
-          position: item.position ?? i,
-        })),
-      });
-    }
-
-    if (Array.isArray(body.sections)) {
-      await prisma.scope_sections.createMany({
-        data: (body.sections as ScopeSectionInput[]).map((s, i) => ({
-          quotation_id: quotation.id,
-          title: s.title ?? null,
-          title_cz: s.title_cz ?? null,
-          content: s.content ?? null,
-          position: s.position ?? i,
-        })),
-      });
-    }
 
     await logAudit({ request, authData: request.authData, action: 'create', entityType: 'quotation', entityId: quotation.id, description: `Vytvořena nabídka ${quotation.quotation_number}` });
     return success(reply, { id: quotation.id }, 201, 'Nabídka byla vytvořena');
@@ -237,74 +86,24 @@ export default async function quotationsRoutes(fastify: FastifyInstance): Promis
     if (id === null) return;
     const parsed = parseBody(UpdateQuotationSchema, request.body);
     if ('error' in parsed) return error(reply, parsed.error, 400);
-    const body = parsed.data;
 
-    const existing = await prisma.quotations.findUnique({ where: { id } });
+    const result = await updateOffer(id, parsed.data);
-    if (!existing) return error(reply, 'Nabídka nenalezena', 404);
+    if ('error' in result) {
-    if (existing.status === 'invalidated') return error(reply, 'Nelze upravit zneplatněnou nabídku', 400);
+      if (result.error === 'not_found') return error(reply, 'Nabídka nenalezena', 404);
-
+      if (result.error === 'invalidated') return error(reply, 'Nelze upravit zneplatněnou nabídku', 400);
-    await prisma.quotations.update({
-      where: { id },
-      data: {
-        quotation_number: body.quotation_number !== undefined ? String(body.quotation_number) : undefined,
-        customer_id: body.customer_id !== undefined ? Number(body.customer_id) : undefined,
-        valid_until: body.valid_until !== undefined ? (body.valid_until ? new Date(String(body.valid_until)) : null) : undefined,
-        currency: body.currency !== undefined ? String(body.currency) : undefined,
-        language: body.language !== undefined ? String(body.language) : undefined,
-        vat_rate: body.vat_rate !== undefined ? Number(body.vat_rate) : undefined,
-        apply_vat: body.apply_vat !== undefined ? (body.apply_vat === true || body.apply_vat === 1 || body.apply_vat === '1') : undefined,
-        exchange_rate: body.exchange_rate !== undefined ? Number(body.exchange_rate) : undefined,
-        status: body.status !== undefined ? String(body.status) : undefined,
-        project_code: body.project_code !== undefined ? (body.project_code ? String(body.project_code) : null) : undefined,
-        scope_title: body.scope_title !== undefined ? (body.scope_title ? String(body.scope_title) : null) : undefined,
-        scope_description: body.scope_description !== undefined ? (body.scope_description ? String(body.scope_description) : null) : undefined,
-        modified_at: new Date(),
-      },
-    });
-
-    if (Array.isArray(body.items) || Array.isArray(body.sections)) {
-      await prisma.$transaction(async (tx) => {
-        if (Array.isArray(body.items)) {
-          await tx.quotation_items.deleteMany({ where: { quotation_id: id } });
-          await tx.quotation_items.createMany({
-            data: (body.items as QuotationItemInput[]).map((item, i) => ({
-              quotation_id: id,
-              description: item.description ?? null,
-              item_description: item.item_description ?? null,
-              quantity: item.quantity ?? 1,
-              unit: item.unit ?? null,
-              unit_price: item.unit_price ?? 0,
-              is_included_in_total: item.is_included_in_total !== false,
-              position: item.position ?? i,
-            })),
-          });
-        }
-        if (Array.isArray(body.sections)) {
-          await tx.scope_sections.deleteMany({ where: { quotation_id: id } });
-          await tx.scope_sections.createMany({
-            data: (body.sections as ScopeSectionInput[]).map((s, i) => ({
-              quotation_id: id,
-              title: s.title ?? null,
-              title_cz: s.title_cz ?? null,
-              content: s.content ?? null,
-              position: s.position ?? i,
-            })),
-          });
-        }
-      });
     }
 
-    await logAudit({ request, authData: request.authData, action: 'update', entityType: 'quotation', entityId: id, description: `Upravena nabídka ${existing.quotation_number}` });
+    await logAudit({ request, authData: request.authData, action: 'update', entityType: 'quotation', entityId: id, description: `Upravena nabídka ${(result as any).quotation_number}` });
     return success(reply, { id }, 200, 'Nabídka byla uložena');
   });
 
   fastify.delete<{ Params: { id: string } }>('/:id', { preHandler: requirePermission('offers.delete') }, async (request, reply) => {
     const id = parseId(request.params.id, reply);
     if (id === null) return;
-    const existing = await prisma.quotations.findUnique({ where: { id } });
+
+    const existing = await deleteOffer(id);
     if (!existing) return error(reply, 'Nabídka nenalezena', 404);
 
-    await prisma.quotations.delete({ where: { id } });
     await logAudit({ request, authData: request.authData, action: 'delete', entityType: 'quotation', entityId: id, description: `Smazána nabídka ${existing.quotation_number}` });
     return success(reply, null, 200, 'Nabídka smazána');
   });

src/services/offers.service.ts

@@ -0,0 +1,284 @@
+import prisma from '../config/database';
+import { generateOfferNumber } from './numbering.service';
+
+interface QuotationItemInput { description?: string; item_description?: string; quantity?: number; unit?: string; unit_price?: number; is_included_in_total?: boolean; position?: number }
+interface ScopeSectionInput { title?: string; title_cz?: string; content?: string; position?: number }
+
+// Re-export for convenience
+export { generateOfferNumber as getNextOfferNumber } from './numbering.service';
+
+const ALLOWED_SORT_FIELDS = ['id', 'quotation_number', 'project_code', 'created_at', 'valid_until', 'currency', 'status'];
+
+interface ListOffersParams {
+  page: number;
+  limit: number;
+  skip: number;
+  sort: string;
+  order: 'asc' | 'desc';
+  search: string;
+  status?: string;
+  customer_id?: number;
+}
+
+function enrichQuotation(q: any) {
+  const subtotal = q.quotation_items
+    .filter((i: any) => i.is_included_in_total !== false)
+    .reduce((s: number, i: any) => s + (Number(i.quantity) || 0) * (Number(i.unit_price) || 0), 0);
+  const vatAmount = q.apply_vat ? subtotal * ((Number(q.vat_rate) || 21) / 100) : 0;
+  const { quotation_items, scope_sections, ...rest } = q;
+  return {
+    ...rest,
+    items: quotation_items,
+    sections: scope_sections,
+    customer_name: q.customers?.name || null,
+    subtotal: Math.round(subtotal * 100) / 100,
+    vat_amount: Math.round(vatAmount * 100) / 100,
+    total: Math.round((subtotal + vatAmount) * 100) / 100,
+  };
+}
+
+export async function listOffers(params: ListOffersParams) {
+  const { page, limit, skip, sort, order, search, status, customer_id } = params;
+  const sortField = ALLOWED_SORT_FIELDS.includes(sort) ? sort : 'id';
+
+  const where: Record<string, unknown> = {};
+  if (status) where.status = status;
+  if (customer_id) where.customer_id = customer_id;
+  if (search) {
+    where.OR = [
+      { quotation_number: { contains: search } },
+      { project_code: { contains: search } },
+      { customers: { name: { contains: search } } },
+    ];
+  }
+
+  const [quotations, total] = await Promise.all([
+    prisma.quotations.findMany({
+      where,
+      skip,
+      take: limit,
+      orderBy: { [sortField]: order },
+      include: {
+        customers: { select: { id: true, name: true } },
+        quotation_items: { orderBy: { position: 'asc' } },
+        scope_sections: { orderBy: { position: 'asc' } },
+      },
+    }),
+    prisma.quotations.count({ where }),
+  ]);
+
+  const enriched = quotations.map(enrichQuotation);
+
+  return { data: enriched, total, page, limit };
+}
+
+export async function getOffer(id: number) {
+  const quotation = await prisma.quotations.findUnique({
+    where: { id },
+    include: {
+      customers: true,
+      quotation_items: { orderBy: { position: 'asc' } },
+      scope_sections: { orderBy: { position: 'asc' } },
+    },
+  });
+  if (!quotation) return null;
+
+  // Fetch linked order if exists
+  let orderInfo = null;
+  if (quotation.order_id) {
+    const order = await prisma.orders.findUnique({
+      where: { id: quotation.order_id },
+      select: { id: true, order_number: true, status: true },
+    });
+    orderInfo = order;
+  }
+
+  const { quotation_items, scope_sections, ...rest } = quotation;
+  return {
+    ...rest,
+    items: quotation_items,
+    sections: scope_sections,
+    customer: quotation.customers,
+    customer_name: quotation.customers?.name || null,
+    order: orderInfo,
+  };
+}
+
+export async function createOffer(body: Record<string, any>) {
+  const quotation = await prisma.quotations.create({
+    data: {
+      quotation_number: body.quotation_number ? String(body.quotation_number) : null,
+      project_code: body.project_code ? String(body.project_code) : null,
+      customer_id: body.customer_id ? Number(body.customer_id) : null,
+      valid_until: body.valid_until ? new Date(String(body.valid_until)) : null,
+      currency: body.currency ? String(body.currency) : 'CZK',
+      language: body.language ? String(body.language) : 'cs',
+      vat_rate: body.vat_rate ? Number(body.vat_rate) : 21.0,
+      apply_vat: body.apply_vat !== false,
+      exchange_rate: body.exchange_rate ? Number(body.exchange_rate) : 1.0,
+      status: body.status ? String(body.status) : 'active',
+      scope_title: body.scope_title ? String(body.scope_title) : null,
+      scope_description: body.scope_description ? String(body.scope_description) : null,
+    },
+  });
+
+  if (Array.isArray(body.items)) {
+    await prisma.quotation_items.createMany({
+      data: (body.items as QuotationItemInput[]).map((item, i) => ({
+        quotation_id: quotation.id,
+        description: item.description ?? null,
+        item_description: item.item_description ?? null,
+        quantity: item.quantity ?? 1,
+        unit: item.unit ?? null,
+        unit_price: item.unit_price ?? 0,
+        is_included_in_total: item.is_included_in_total !== false,
+        position: item.position ?? i,
+      })),
+    });
+  }
+
+  if (Array.isArray(body.sections)) {
+    await prisma.scope_sections.createMany({
+      data: (body.sections as ScopeSectionInput[]).map((s, i) => ({
+        quotation_id: quotation.id,
+        title: s.title ?? null,
+        title_cz: s.title_cz ?? null,
+        content: s.content ?? null,
+        position: s.position ?? i,
+      })),
+    });
+  }
+
+  return quotation;
+}
+
+export async function updateOffer(id: number, body: Record<string, any>) {
+  const existing = await prisma.quotations.findUnique({ where: { id } });
+  if (!existing) return { error: 'not_found' as const };
+  if (existing.status === 'invalidated') return { error: 'invalidated' as const };
+
+  await prisma.quotations.update({
+    where: { id },
+    data: {
+      quotation_number: body.quotation_number !== undefined ? String(body.quotation_number) : undefined,
+      customer_id: body.customer_id !== undefined ? Number(body.customer_id) : undefined,
+      valid_until: body.valid_until !== undefined ? (body.valid_until ? new Date(String(body.valid_until)) : null) : undefined,
+      currency: body.currency !== undefined ? String(body.currency) : undefined,
+      language: body.language !== undefined ? String(body.language) : undefined,
+      vat_rate: body.vat_rate !== undefined ? Number(body.vat_rate) : undefined,
+      apply_vat: body.apply_vat !== undefined ? (body.apply_vat === true || body.apply_vat === 1 || body.apply_vat === '1') : undefined,
+      exchange_rate: body.exchange_rate !== undefined ? Number(body.exchange_rate) : undefined,
+      status: body.status !== undefined ? String(body.status) : undefined,
+      project_code: body.project_code !== undefined ? (body.project_code ? String(body.project_code) : null) : undefined,
+      scope_title: body.scope_title !== undefined ? (body.scope_title ? String(body.scope_title) : null) : undefined,
+      scope_description: body.scope_description !== undefined ? (body.scope_description ? String(body.scope_description) : null) : undefined,
+      modified_at: new Date(),
+    },
+  });
+
+  if (Array.isArray(body.items) || Array.isArray(body.sections)) {
+    await prisma.$transaction(async (tx) => {
+      if (Array.isArray(body.items)) {
+        await tx.quotation_items.deleteMany({ where: { quotation_id: id } });
+        await tx.quotation_items.createMany({
+          data: (body.items as QuotationItemInput[]).map((item, i) => ({
+            quotation_id: id,
+            description: item.description ?? null,
+            item_description: item.item_description ?? null,
+            quantity: item.quantity ?? 1,
+            unit: item.unit ?? null,
+            unit_price: item.unit_price ?? 0,
+            is_included_in_total: item.is_included_in_total !== false,
+            position: item.position ?? i,
+          })),
+        });
+      }
+      if (Array.isArray(body.sections)) {
+        await tx.scope_sections.deleteMany({ where: { quotation_id: id } });
+        await tx.scope_sections.createMany({
+          data: (body.sections as ScopeSectionInput[]).map((s, i) => ({
+            quotation_id: id,
+            title: s.title ?? null,
+            title_cz: s.title_cz ?? null,
+            content: s.content ?? null,
+            position: s.position ?? i,
+          })),
+        });
+      }
+    });
+  }
+
+  return { id, quotation_number: existing.quotation_number };
+}
+
+export async function deleteOffer(id: number) {
+  const existing = await prisma.quotations.findUnique({ where: { id } });
+  if (!existing) return null;
+
+  await prisma.quotations.delete({ where: { id } });
+  return existing;
+}
+
+export async function duplicateOffer(id: number) {
+  const original = await prisma.quotations.findUnique({
+    where: { id },
+    include: { quotation_items: { orderBy: { position: 'asc' } }, scope_sections: { orderBy: { position: 'asc' } } },
+  });
+  if (!original) return null;
+
+  const nextOfferNumber = await generateOfferNumber();
+
+  const copy = await prisma.quotations.create({
+    data: {
+      quotation_number: nextOfferNumber,
+      project_code: original.project_code,
+      customer_id: original.customer_id,
+      valid_until: null,
+      currency: original.currency,
+      language: original.language,
+      vat_rate: original.vat_rate,
+      apply_vat: original.apply_vat,
+      exchange_rate: original.exchange_rate,
+      status: 'active',
+      scope_title: original.scope_title,
+      scope_description: original.scope_description,
+    },
+  });
+
+  if (original.quotation_items.length > 0) {
+    await prisma.quotation_items.createMany({
+      data: original.quotation_items.map((item) => ({
+        quotation_id: copy.id,
+        description: item.description,
+        item_description: item.item_description,
+        quantity: item.quantity,
+        unit: item.unit,
+        unit_price: item.unit_price,
+        is_included_in_total: item.is_included_in_total,
+        position: item.position,
+      })),
+    });
+  }
+
+  if (original.scope_sections.length > 0) {
+    await prisma.scope_sections.createMany({
+      data: original.scope_sections.map((s) => ({
+        quotation_id: copy.id,
+        title: s.title,
+        title_cz: s.title_cz,
+        content: s.content,
+        position: s.position,
+      })),
+    });
+  }
+
+  return { copy, original };
+}
+
+export async function invalidateOffer(id: number) {
+  const existing = await prisma.quotations.findUnique({ where: { id } });
+  if (!existing) return null;
+
+  await prisma.quotations.update({ where: { id }, data: { status: 'invalidated', modified_at: new Date() } });
+  return existing;
+}