/**
 * InMemoryInternalDataClient — deterministic in-memory InternalDataClient.
 *
 * Holds a few FAKE work orders, purchase orders, and sites in memory. Returns
 * null for unknown ids, matching the real client's contract. No AWS, no
 * network.
 *
 * This is for build-plan §4 "in-memory dev clients (tools return real data
 * locally)".
 */

import type {
  InternalDataClient,
  PurchaseOrderRecord,
  SiteRecord,
  WorkOrderRecord,
} from './client.js';

function seedWorkOrders(): Map<string, WorkOrderRecord> {
  return new Map<string, WorkOrderRecord>([
    [
      'WO-1001',
      {
        workOrderId: 'WO-1001',
        title: 'Replace dock lighting circuit',
        status: 'in_progress',
        siteId: 'SITE-01',
        assignedTo: 'lauren@seahavenind.com',
        createdAt: '2026-06-18T08:00:00Z',
        updatedAt: '2026-06-22T16:30:00Z',
        description: 'Pier B lighting circuit tripping under load; replace breaker and run.',
      },
    ],
    [
      'WO-1002',
      {
        workOrderId: 'WO-1002',
        title: 'Quarterly HVAC inspection',
        status: 'open',
        siteId: 'SITE-02',
        createdAt: '2026-06-20T10:15:00Z',
        updatedAt: '2026-06-20T10:15:00Z',
      },
    ],
  ]);
}

function seedPurchaseOrders(): Map<string, PurchaseOrderRecord> {
  return new Map<string, PurchaseOrderRecord>([
    [
      'PO-2001',
      {
        purchaseOrderId: 'PO-2001',
        vendor: 'Coastal Supply & Hardware',
        status: 'approved',
        totalAmount: 1842.5,
        currency: 'USD',
        issuedAt: '2026-06-15T12:00:00Z',
        updatedAt: '2026-06-16T09:00:00Z',
        lineItems: [
          { description: 'Marine-grade breaker 30A', quantity: 4, unitPrice: 210.0 },
          { description: 'THWN wire, 250ft spool', quantity: 1, unitPrice: 1002.5 },
        ],
      },
    ],
    [
      'PO-2002',
      {
        purchaseOrderId: 'PO-2002',
        vendor: 'Tidewater Plumbing LLC',
        status: 'pending',
        totalAmount: 640.0,
        currency: 'USD',
        issuedAt: '2026-06-19T15:30:00Z',
        updatedAt: '2026-06-19T15:30:00Z',
      },
    ],
  ]);
}

function seedSites(): Map<string, SiteRecord> {
  return new Map<string, SiteRecord>([
    [
      'SITE-01',
      {
        siteId: 'SITE-01',
        name: 'Marina Pier Complex',
        address: '88 Marina Way, Sea Haven, NY 11790',
        region: 'North Shore',
        status: 'active',
        assignedTechnicians: ['lauren@seahavenind.com'],
      },
    ],
    [
      'SITE-02',
      {
        siteId: 'SITE-02',
        name: 'Bayfront Warehouse',
        address: '23 Bayfront Rd, Sea Haven, NY 11790',
        region: 'North Shore',
        status: 'active',
      },
    ],
  ]);
}

/** In-memory InternalDataClient seeded with a few fake records. */
export class InMemoryInternalDataClient implements InternalDataClient {
  private readonly workOrders = seedWorkOrders();
  private readonly purchaseOrders = seedPurchaseOrders();
  private readonly sites = seedSites();

  async getWorkOrder(workOrderId: string): Promise<WorkOrderRecord | null> {
    return this.workOrders.get(workOrderId) ?? null;
  }

  async getPurchaseOrder(purchaseOrderId: string): Promise<PurchaseOrderRecord | null> {
    return this.purchaseOrders.get(purchaseOrderId) ?? null;
  }

  async getSite(siteId: string): Promise<SiteRecord | null> {
    return this.sites.get(siteId) ?? null;
  }
}