import { readFileSync } from 'node:fs';
import { describe, expect, it } from 'vitest';
import type { FindingRecord } from '../../src/domain/finding';
import { dashboardDomainAssignment, dashboardDomainRecords } from '../../src/features/dashboard/DashboardPanel';

const component = readFileSync(new URL('../../src/features/dashboard/DashboardPanel.tsx', import.meta.url), 'utf8');

function record(id: string, title: string, fields: Array<[string, string]> = []): FindingRecord {
  return {
    id,
    title,
    fields: fields.map(([label, value]) => ({ label, value })),
    sourceFile: 'synthetic.csv'
  } as unknown as FindingRecord;
}

describe('client info derivation cost', () => {
  /**
   * Ein Mandantenblatt traegt mehrere tausend Datensaetze. Die Ansicht darf sie
   * nicht bei jedem Rendern erneut durchlaufen, sonst haengt sie bei jeder
   * Zustandsaenderung der Anwendung.
   */
  it('derives every record-level view once inside a memoized hook', () => {
    expect(component).toContain('function useDashboardAnalysis(');
    expect(component).toContain('const analysis = useDashboardAnalysis(activeSheet, dataset, activeProfile, reviews, sourceFilter);');
    // Facetten und Auswertung ueberdauern den Ansichtswechsel, sonst rechnet
    // jeder Besuch der Client Info dieselben Datensaetze erneut durch. Die
    // Zustandsableitung je Datensatz liegt innerhalb dieses memoisierten Hooks
    // und wird ueber denselben analysisCache mitgetragen.
    expect(component).toContain('const analysisCache = new WeakMap<');
    expect(component).toContain('useMemo(() => dashboardEnvironmentDetail(environment.snapshot), [environment.snapshot])');
    // Die teure Ersatzzaehlung aus Findingtexten laeuft nur, solange die
    // Verarbeitungsliste der Sicherungen noch nicht geantwortet hat.
    expect(component).toContain('const derivedGpoCount = useMemo(');
    expect(component).toContain('gpoInventory.gpoCount ?? derivedGpoCount');
  });

  it('classifies all security domains in a single pass over the records', () => {
    const records = [
      record('r1', 'Inactive user account detected'),
      record('r2', 'Group Policy baseline deviation'),
      record('r3', 'Nothing classifiable here')
    ];
    let textReads = 0;
    const counted = records.map(item => ({
      ...item,
      get fields() {
        textReads += 1;
        return item.fields;
      }
    })) as FindingRecord[];

    const assignment = dashboardDomainAssignment(counted);

    expect(textReads).toBe(counted.length);
    expect(assignment.get('identity')?.map(item => item.id)).toEqual(['r1']);
    expect(assignment.get('gpo')?.map(item => item.id)).toEqual(['r2']);
    expect(assignment.get('unclassified')?.map(item => item.id)).toEqual(['r3']);
  });

  it('assigns every record to exactly one primary domain', () => {
    const records = [
      record('gpo', 'Account password policy deviation', [['Category', 'GPOs']]),
      record('identity', 'Inactive user account'),
      record('other', 'No matching classification')
    ];
    const assignment = dashboardDomainAssignment(records);
    const assigned = [...assignment.values()].flat();

    expect(assignment.get('gpo')?.map(item => item.id)).toEqual(['gpo']);
    expect(assignment.get('identity')?.map(item => item.id)).toEqual(['identity']);
    expect(assignment.get('unclassified')?.map(item => item.id)).toEqual(['other']);
    expect(assigned.map(item => item.id).sort()).toEqual(records.map(item => item.id).sort());
    expect(new Set(assigned.map(item => item.id)).size).toBe(records.length);
  });

  it('keeps the single-domain lookup in agreement with the full assignment', () => {
    const records = [
      record('r1', 'Stale computer account'),
      record('r2', 'Certificate template allows SAN'),
      record('r3', 'Conditional access gap')
    ];

    const assignment = dashboardDomainAssignment(records);
    ['identity', 'infrastructure', 'authentication', 'gpo'].forEach(domain => {
      expect(dashboardDomainRecords(records, domain)).toEqual(assignment.get(domain) ?? []);
    });
    expect(dashboardDomainRecords(records, 'missing')).toEqual([]);
  });
});