// @vitest-environment jsdom

import { describe, expect, it } from 'vitest';
import * as XLSX from 'xlsx';
import { buildDefenderVulnerabilityModel, type DefenderSourceRow, type DefenderSourceTable } from '../../src/domain/defender-for-iot';
import { importFile } from '../../src/importers/importer';
import { createCanonicalImportBatch } from '../../src/importers/canonical-import';
import { importProfiles } from '../../src/profiles/profile-catalog';
import { confirmEntryMappings, previewEntryFromDataset } from '../../src/features/import-workflow/import-workflow';
import { canonicalModelToDataset } from '../../src/features/project-import/canonical-model-to-dataset';
import { summarizeScanProcessingReadiness } from '../../src/features/project-import/datahub-processing-readiness';
import { createScannerUnifiedResult } from '../../src/domain/unified-result';

const summaryHeaders = ['Name', 'IP', 'Site', 'Sensor', 'TotalCVEs', 'Critical', 'High', 'Medium', 'Low'];
const detailHeaders = ['Name', 'IP', 'Site', 'Sensor', 'CVE', 'Severity', 'NULL', 'Beschreibung'];

function table(tableIndex: number, headers: string[], rows: Array<Record<string, unknown>>): DefenderSourceTable {
  return {
    tableIndex,
    name: headers.includes('CVE') ? 'Vulnerability detail' : 'Asset summary',
    headers,
    rows: rows.map((fields, index): DefenderSourceRow => ({ tableIndex, rowIndex: index + 1, fields: fields as DefenderSourceRow['fields'] }))
  };
}

function summary(name: string, ip: string, site: string, counts: [number, number, number, number], sensor = 'sensor-a') {
  return { Name: name, IP: ip, Site: site, Sensor: sensor, TotalCVEs: counts.reduce((sum, value) => sum + value, 0), Critical: counts[0], High: counts[1], Medium: counts[2], Low: counts[3] };
}

function detail(name: string, ip: string, site: string, sensor: string, cve: string, severity: string, description = 'Synthetic description', nullValue: unknown = null) {
  return { Name: name, IP: ip, Site: site, Sensor: sensor, CVE: cve, Severity: severity, NULL: nullValue, Beschreibung: description };
}

describe('Microsoft Defender for IoT vulnerability model', () => {
  it('models CVEs, devices, occurrences, observations, and aggregate-only counts independently', () => {
    const model = buildDefenderVulnerabilityModel([
      table(0, summaryHeaders, [
        summary('00:11:22:33:44:55', '10.0.0.1', 'North', [2, 3, 0, 1]),
        summary('device-b', '10.0.0.2', 'North', [1, 0, 0, 0])
      ]),
      table(1, detailHeaders, [
        detail('00:11:22:33:44:55', '10.0.0.1', 'North', 'sensor-a', 'CVE-2026-0001', 'Critical'),
        detail('00:11:22:33:44:55', '10.0.0.1', 'North', 'sensor-b', 'CVE-2026-0001', 'Critical'),
        detail('00:11:22:33:44:55', '10.0.0.1', 'North', 'sensor-a', 'CVE-2026-0002', 'Critical'),
        detail('device-b', '10.0.0.2', 'North', 'sensor-a', 'CVE-2026-0001', 'Critical')
      ])
    ]);

    expect(model.cves).toHaveLength(2);
    expect(model.devices).toHaveLength(2);
    expect(model.occurrences).toHaveLength(3);
    expect(model.observations).toHaveLength(4);
    expect(model.cves.find(item => item.id === 'CVE-2026-0001')).toMatchObject({ deviceIds: expect.arrayContaining([expect.any(String), expect.any(String)]), observationCount: 3 });
    expect(model.occurrences.find(item => item.cve === 'CVE-2026-0001' && item.observations.length === 2)?.sensors).toEqual(['sensor-a', 'sensor-b']);
    expect(model.devices.find(item => item.displayName === '00:11:22:33:44:55')?.severity.high).toMatchObject({ detail: 0, summary: 3, aggregateOnly: 3, state: 'aggregate-only' });
    expect(model.aggregateOnlyCount).toBe(4);
    expect(model.sites[0]).toMatchObject({ assetCount: 2, uniqueCveCount: 2, affectedDeviceCount: 2, rawObservationCount: 4 });
  });

  it('uses MAC, IP, and site-scoped name identities without merging a reused IP across sites', () => {
    const model = buildDefenderVulnerabilityModel([table(0, detailHeaders, [
      detail('AA-BB-CC-DD-EE-FF', '10.0.0.1', 'A', 's1', 'CVE-2026-0101', 'High'),
      detail('device-ip', '10.0.0.2', 'A', 's1', 'CVE-2026-0102', 'High'),
      detail('device-name', '', 'A', 's1', 'CVE-2026-0103', 'Medium'),
      detail('device-reused-a', '10.0.0.9', 'A', 's1', 'CVE-2026-0104', 'Low'),
      detail('device-reused-b', '10.0.0.9', 'B', 's2', 'CVE-2026-0104', 'Low'),
      detail('', '', '', '', 'CVE-2026-0105', 'Critical')
    ])]);

    expect(model.devices.map(item => item.identityMethod)).toEqual(expect.arrayContaining(['mac', 'ip', 'name', 'unresolved']));
    expect(model.devices.filter(item => item.ip === '10.0.0.9')).toHaveLength(2);
    expect(model.diagnostics.map(item => item.code)).toEqual(expect.arrayContaining([
      'defender-device-identity-site-scoped', 'defender-device-identity-unresolved'
    ]));
  });

  it('keeps duplicate rows as evidence and flags conflicts, unexpected NULL data, and reconciliation failures', () => {
    const duplicate = detail('device-a', '', 'A', 'sensor-a', 'CVE-2026-0201', 'Critical', 'Description A');
    const model = buildDefenderVulnerabilityModel([
      table(0, summaryHeaders, [
        { ...summary('device-a', '', 'A', [3, 0, 0, 0]), TotalCVEs: 99 },
        summary('device-a', '', 'A', [2, 0, 0, 0])
      ]),
      table(1, detailHeaders, [
        duplicate,
        { ...duplicate },
        detail('device-a', '', 'A', 'sensor-b', 'CVE-2026-0201', 'High', 'Description B', 'preserve-me'),
        detail('device-a', '', 'A', 'sensor-a', 'CVE-2026-0202', 'Critical')
      ])
    ]);

    expect(model.occurrences).toHaveLength(2);
    expect(model.observations).toHaveLength(4);
    expect(model.observations.some(item => item.additionalSourceFields.NULL === 'preserve-me')).toBe(true);
    expect(model.diagnostics.map(item => item.code)).toEqual(expect.arrayContaining([
      'defender-summary-total-mismatch',
      'defender-summary-conflict',
      'defender-duplicate-source-observation',
      'defender-null-column-populated',
      'defender-cve-severity-conflict',
      'defender-cve-description-conflict',
      'defender-summary-detail-mismatch'
    ]));
  });

  it('distinguishes zero, unavailable detail, and single-sheet variants', () => {
    const summaryOnly = buildDefenderVulnerabilityModel([table(0, summaryHeaders, [summary('device-a', '', 'A', [0, 2, 0, 0])])]);
    const detailOnly = buildDefenderVulnerabilityModel([table(0, detailHeaders, [detail('device-a', '', 'A', 'sensor-a', 'CVE-2026-0301', 'Medium')])]);

    expect(summaryOnly.available).toBe(true);
    expect(summaryOnly.occurrences).toHaveLength(0);
    expect(summaryOnly.devices[0].severity.critical.state).toBe('zero');
    expect(summaryOnly.devices[0].severity.high.state).toBe('aggregate-only');
    expect(detailOnly.devices[0].severity.medium.state).toBe('detail-only');
    expect(detailOnly.devices[0].severity.low.state).toBe('unavailable');
  });

  it('selects the versioned profile and emits one candidate per CVE with devices aggregated', async () => {
    const workbook = XLSX.utils.book_new();
    XLSX.utils.book_append_sheet(workbook, XLSX.utils.json_to_sheet([
      summary('00:11:22:33:44:55', '10.0.0.1', 'Synthetic site', [1, 2, 0, 0]),
      summary('device-b', '10.0.0.2', 'Synthetic site', [1, 0, 0, 0])
    ], { header: summaryHeaders }), 'Assets');
    XLSX.utils.book_append_sheet(workbook, XLSX.utils.json_to_sheet([
      detail('00:11:22:33:44:55', '10.0.0.1', 'Synthetic site', 'sensor-a', 'CVE-2026-0401', 'Critical'),
      detail('00:11:22:33:44:55', '10.0.0.1', 'Synthetic site', 'sensor-b', 'CVE-2026-0401', 'Critical'),
      detail('device-b', '10.0.0.2', 'Synthetic site', 'sensor-a', 'CVE-2026-0401', 'Critical')
    ], { header: detailHeaders }), 'Vulnerabilities');
    const bytes = XLSX.write(workbook, { type: 'array', bookType: 'xlsx' });
    const imported = await importFile(new File([bytes], 'defender-synthetic.xlsx', { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' }), { profiles: importProfiles });

    expect(imported.profileId).toBe('defender-for-iot-vulnerabilities');
    expect(imported.profileVersion).toBe('1.1.0');
    expect(imported.extraction?.extractor).toMatchObject({ id: 'defender-for-iot-vulnerability-source-extractor', version: '1.0.0' });
    // Two devices share one CVE: the Work view must show a single aggregated finding, not one row per device.
    expect(imported.extraction?.candidates).toHaveLength(1);
    expect(imported.extraction?.candidates[0].fields.find(field => field.label === 'Observation Count')?.originalValue).toBe(3);
    expect(imported.extraction?.candidates[0].fields.find(field => field.label === 'Affected Device Count')?.originalValue).toBe(2);
    // The affected devices are carried as a markdown table for the result popup, one row per device with its scanner and site.
    const devicesTable = imported.extraction?.candidates[0].fields.find(field => field.label === 'Affected Devices')?.decodedValue ?? '';
    expect(devicesTable).toContain('| Affected Device | Scanner | Site |');
    expect(devicesTable).toContain('00:11:22:33:44:55');
    expect(devicesTable).toContain('device-b');
    expect(imported.mapping?.candidates).toHaveLength(1);
    expect(imported.sheets.map(sheet => sheet.analysis.records.length).sort()).toEqual([2, 3]);

    const entry = confirmEntryMappings(previewEntryFromDataset(imported, {
      sha256: 'd'.repeat(64), fileName: imported.fileName, sizeBytes: imported.fileSize, lastModified: imported.lastModified
    }), importProfiles);
    const canonical = createCanonicalImportBatch('defender-synthetic', [entry], '2026-09-10T06:00:00.000Z').model;
    expect(canonical.importFiles[0]).toMatchObject({
      detectedTool: { id: 'defender-for-iot-vulnerabilities' },
      processedWith: {
        profileId: 'defender-for-iot-vulnerabilities',
        profileVersion: '1.1.0',
        normalizationVersion: '1.1.0',
        compatibilityKey: 'defender-for-iot-vulnerabilities-v2'
      }
    });
    expect(summarizeScanProcessingReadiness(canonical.importFiles)).toMatchObject({ state: 'ready', statuses: ['current'] });
    expect(canonical.findingDefinitions).toHaveLength(1);
    expect(canonical.findingOccurrences).toHaveLength(1);
    expect(canonical.findingOccurrences[0]).toMatchObject({
      outcome: { normalizedValue: 'warning' },
      technicalExecutionState: { normalizedValue: 'completed' }
    });
    expect(createScannerUnifiedResult({
      project: canonical.project,
      assessment: canonical.assessment,
      scanRun: canonical.scanRuns[0],
      importFile: canonical.importFiles[0],
      definition: canonical.findingDefinitions[0],
      occurrence: canonical.findingOccurrences[0],
      reviews: canonical.reviews
    })).toMatchObject({
      resultType: 'vulnerability_finding',
      outcomeNormalized: 'warning',
      isIoe: false,
      isDeviation: true
    });
    expect(createScannerUnifiedResult({
      project: canonical.project,
      assessment: canonical.assessment,
      scanRun: canonical.scanRuns[0],
      importFile: canonical.importFiles[0],
      definition: canonical.findingDefinitions[0],
      occurrence: {
        ...canonical.findingOccurrences[0],
        outcome: { ...canonical.findingOccurrences[0].outcome!, normalizedValue: 'unknown' }
      },
      reviews: canonical.reviews
    })).toMatchObject({
      resultType: 'vulnerability_finding',
      outcomeNormalized: 'warning',
      isIoe: false,
      isDeviation: true
    });
    // The aggregated CVE carries its affected-device count as the affected asset (two devices here); the device list lives in the evidence table.
    expect(canonical.findingOccurrences[0].affectedAsset?.normalizedValue).toBe('2');
    expect(canonical.findingOccurrences[0].score).toBeUndefined();
    expect(canonical.evidence).toHaveLength(1);
    expect(canonical.evidence[0]).toMatchObject({ kind: 'object', value: expect.any(Array) });
    expect(canonical.evidence[0].value).toHaveLength(3);
    // Both asset-summary rows stay preserved as source data alongside the single aggregated finding.
    expect(canonical.sourceTables.flatMap(source => source.rows ?? [])).toHaveLength(2);
  });

  it('keeps a summary-only import viewable without creating finding definitions or occurrences', async () => {
    const workbook = XLSX.utils.book_new();
    XLSX.utils.book_append_sheet(workbook, XLSX.utils.json_to_sheet([
      summary('synthetic-device', '', 'Synthetic site', [0, 2, 0, 0])
    ], { header: summaryHeaders }), 'Assets');
    const bytes = XLSX.write(workbook, { type: 'array', bookType: 'xlsx' });
    const imported = await importFile(new File([bytes], 'defender-summary-synthetic.xlsx', { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' }), { profiles: importProfiles });
    const entry = confirmEntryMappings(previewEntryFromDataset(imported, {
      sha256: 'e'.repeat(64), fileName: imported.fileName, sizeBytes: imported.fileSize, lastModified: imported.lastModified
    }), importProfiles);
    const canonical = createCanonicalImportBatch('defender-summary-synthetic', [entry], '2026-09-10T06:00:00.000Z').model;
    const projected = canonicalModelToDataset(canonical);

    expect(imported.profileId).toBe('defender-for-iot-vulnerabilities');
    expect(canonical.findingDefinitions).toHaveLength(0);
    expect(canonical.findingOccurrences).toHaveLength(0);
    expect(projected?.profileId).toBe('defender-for-iot-vulnerabilities');
    expect(projected?.sheets.some(sheet => sheet.analysis.headers.includes('TotalCVEs'))).toBe(true);
  });
});