import { test } from 'node:test';
import assert from 'node:assert/strict';
import {
  humanizeFinding,
  humanizeFindings,
  humanizeEnvelope,
  computeRelevanceContext,
} from '../../scanners/lib/humanizer.mjs';

// ─── helpers ────────────────────────────────────────────────────────────

function makeFinding(overrides = {}) {
  return {
    id: 'CA-CML-001',
    scanner: 'CML',
    severity: 'medium',
    title: 'No CLAUDE.md found',
    description: 'No CLAUDE.md file at the project root.',
    file: '/Users/test/project/CLAUDE.md',
    line: null,
    evidence: 'evidence text',
    category: 'config',
    recommendation: 'Create one.',
    autoFixable: false,
    ...overrides,
  };
}

// ─── purity ─────────────────────────────────────────────────────────────

test('humanizeFinding does not mutate its input', () => {
  const input = makeFinding();
  const before = JSON.parse(JSON.stringify(input));
  humanizeFinding(input);
  assert.deepEqual(input, before, 'input was mutated');
});

test('humanizeFindings does not mutate its input array', () => {
  const input = [makeFinding(), makeFinding({ id: 'CA-CML-002', title: 'Repeated content detected' })];
  const before = JSON.parse(JSON.stringify(input));
  humanizeFindings(input);
  assert.deepEqual(input, before, 'input array was mutated');
});

test('humanizeEnvelope does not mutate its input', () => {
  const env = {
    target_path: '/tmp',
    scanners: [
      { scanner: 'CML', status: 'ok', findings: [makeFinding()], counts: {} },
    ],
  };
  const before = JSON.parse(JSON.stringify(env));
  humanizeEnvelope(env);
  assert.deepEqual(env, before, 'envelope was mutated');
});

// ─── field preservation ────────────────────────────────────────────────

test('humanizeFinding preserves id, scanner, severity, file, line, evidence, category, autoFixable', () => {
  const input = makeFinding({
    id: 'CA-CML-042',
    scanner: 'CML',
    severity: 'high',
    file: '/tmp/x.md',
    line: 17,
    evidence: 'specific snippet',
    category: 'cml',
    autoFixable: true,
  });
  const out = humanizeFinding(input);
  assert.equal(out.id, 'CA-CML-042');
  assert.equal(out.scanner, 'CML');
  assert.equal(out.severity, 'high');
  assert.equal(out.file, '/tmp/x.md');
  assert.equal(out.line, 17);
  assert.equal(out.evidence, 'specific snippet');
  assert.equal(out.category, 'cml');
  assert.equal(out.autoFixable, true);
});

test('humanizeFinding preserves optional details payload', () => {
  const input = makeFinding();
  input.details = { foo: 'bar', count: 7 };
  const out = humanizeFinding(input);
  assert.deepEqual(out.details, { foo: 'bar', count: 7 });
});

// ─── translation lookup ────────────────────────────────────────────────

test('humanizeFinding rewrites title for known static title', () => {
  const input = makeFinding({ scanner: 'CML', title: 'No CLAUDE.md found' });
  const out = humanizeFinding(input);
  assert.notEqual(out.title, input.title, 'title should be translated');
  assert.ok(out.title.toLowerCase().includes('instructions') || out.title.toLowerCase().includes('claude'),
    `humanized title should mention instructions or claude, got: ${out.title}`);
});

test('humanizeFinding falls back to _default when title unknown', () => {
  const input = makeFinding({ scanner: 'CML', title: 'Unrecognized brand-new finding title' });
  const out = humanizeFinding(input);
  assert.notEqual(out.title, input.title, '_default should kick in');
  // CML _default mentions "instructions file"
  assert.ok(/instructions file/i.test(out.title), `expected CML _default title, got: ${out.title}`);
});

test('humanizeFinding passes through original strings when scanner prefix unknown', () => {
  const input = makeFinding({ scanner: 'XXX', title: 'whatever' });
  const out = humanizeFinding(input);
  assert.equal(out.title, 'whatever');
  assert.equal(out.description, input.description);
  assert.equal(out.recommendation, input.recommendation);
});

test('humanizeFinding matches pattern entries (template-literal titles)', () => {
  const input = makeFinding({
    scanner: 'COL',
    title: 'Skill name "okr-helper" used by multiple plugins',
  });
  const out = humanizeFinding(input);
  assert.notEqual(out.title, input.title);
  assert.ok(/two plugins|same name|multiple/i.test(out.title) ||
            /two plugins|same name|multiple/i.test(out.description),
    `expected pattern match for COL multiple-plugins case, got title: ${out.title}`);
});

// ─── userActionLanguage ────────────────────────────────────────────────

test('humanizeFinding maps severity=critical -> "Fix this now"', () => {
  const out = humanizeFinding(makeFinding({ severity: 'critical' }));
  assert.equal(out.userActionLanguage, 'Fix this now');
});

test('humanizeFinding maps severity=high -> "Fix soon"', () => {
  const out = humanizeFinding(makeFinding({ severity: 'high' }));
  assert.equal(out.userActionLanguage, 'Fix soon');
});

test('humanizeFinding maps severity=medium -> "Fix when convenient"', () => {
  const out = humanizeFinding(makeFinding({ severity: 'medium' }));
  assert.equal(out.userActionLanguage, 'Fix when convenient');
});

test('humanizeFinding maps severity=low -> "Optional cleanup"', () => {
  const out = humanizeFinding(makeFinding({ severity: 'low' }));
  assert.equal(out.userActionLanguage, 'Optional cleanup');
});

test('humanizeFinding maps severity=info -> "FYI"', () => {
  const out = humanizeFinding(makeFinding({ severity: 'info' }));
  assert.equal(out.userActionLanguage, 'FYI');
});

test('humanizeFinding falls back to "FYI" for unknown severity', () => {
  const out = humanizeFinding(makeFinding({ severity: 'mystery' }));
  assert.equal(out.userActionLanguage, 'FYI');
});

// ─── userImpactCategory ────────────────────────────────────────────────

test('humanizeFinding sets category Configuration mistake for CML/SET/HKV/RUL/MCP/IMP/PLH', () => {
  for (const s of ['CML', 'SET', 'HKV', 'RUL', 'MCP', 'IMP', 'PLH']) {
    const out = humanizeFinding(makeFinding({ scanner: s }));
    assert.equal(out.userImpactCategory, 'Configuration mistake', `${s} should map to Configuration mistake`);
  }
});

test('humanizeFinding sets category Conflict for CNF/COL', () => {
  for (const s of ['CNF', 'COL']) {
    const out = humanizeFinding(makeFinding({ scanner: s }));
    assert.equal(out.userImpactCategory, 'Conflict');
  }
});

test('humanizeFinding sets category Wasted tokens for TOK/CPS', () => {
  for (const s of ['TOK', 'CPS']) {
    const out = humanizeFinding(makeFinding({ scanner: s }));
    assert.equal(out.userImpactCategory, 'Wasted tokens');
  }
});

test('humanizeFinding sets category Dead config for DIS', () => {
  const out = humanizeFinding(makeFinding({ scanner: 'DIS' }));
  assert.equal(out.userImpactCategory, 'Dead config');
});

test('humanizeFinding sets category Missed opportunity for GAP', () => {
  const out = humanizeFinding(makeFinding({ scanner: 'GAP', title: 'No CLAUDE.md file' }));
  assert.equal(out.userImpactCategory, 'Missed opportunity');
});

test('humanizeFinding sets category Other for unknown scanner', () => {
  const out = humanizeFinding(makeFinding({ scanner: 'XXX' }));
  assert.equal(out.userImpactCategory, 'Other');
});

// ─── relevanceContext ──────────────────────────────────────────────────

test('computeRelevanceContext detects test-fixture paths', () => {
  assert.equal(computeRelevanceContext('/repo/tests/fixtures/foo/CLAUDE.md'), 'test-fixture-no-impact');
  assert.equal(computeRelevanceContext('/repo/test/fixtures/bar.json'), 'test-fixture-no-impact');
});

test('computeRelevanceContext detects local-only paths via .local. infix', () => {
  assert.equal(computeRelevanceContext('/repo/.claude/settings.local.json'), 'affects-this-machine-only');
  assert.equal(computeRelevanceContext('/repo/CLAUDE.local.md'), 'affects-this-machine-only');
});

test('computeRelevanceContext defaults to affects-everyone for normal paths', () => {
  assert.equal(computeRelevanceContext('/repo/CLAUDE.md'), 'affects-everyone');
  assert.equal(computeRelevanceContext('/repo/.claude/settings.json'), 'affects-everyone');
});

test('computeRelevanceContext defaults to affects-everyone for null/empty paths', () => {
  assert.equal(computeRelevanceContext(null), 'affects-everyone');
  assert.equal(computeRelevanceContext(undefined), 'affects-everyone');
  assert.equal(computeRelevanceContext(''), 'affects-everyone');
});

test('humanizeFinding sets relevanceContext from file', () => {
  const f = makeFinding({ file: '/repo/tests/fixtures/x.json' });
  assert.equal(humanizeFinding(f).relevanceContext, 'test-fixture-no-impact');

  const g = makeFinding({ file: '/repo/.claude/settings.local.json' });
  assert.equal(humanizeFinding(g).relevanceContext, 'affects-this-machine-only');

  const h = makeFinding({ file: '/repo/CLAUDE.md' });
  assert.equal(humanizeFinding(h).relevanceContext, 'affects-everyone');
});

// ─── humanizeFindings & humanizeEnvelope ──────────────────────────────

test('humanizeFindings translates each finding in the array', () => {
  const findings = [
    makeFinding({ scanner: 'CML', title: 'No CLAUDE.md found' }),
    makeFinding({ id: 'CA-CML-002', scanner: 'CML', title: 'Uses HTML comments' }),
  ];
  const out = humanizeFindings(findings);
  assert.equal(out.length, 2);
  assert.notEqual(out[0].title, findings[0].title);
  assert.notEqual(out[1].title, findings[1].title);
});

test('humanizeFindings returns input unchanged if not an array', () => {
  assert.equal(humanizeFindings(null), null);
  assert.equal(humanizeFindings(undefined), undefined);
});

test('humanizeEnvelope walks scanners[].findings and humanizes each', () => {
  const env = {
    target_path: '/tmp',
    scanners: [
      {
        scanner: 'CML',
        status: 'ok',
        findings: [makeFinding({ scanner: 'CML', title: 'No CLAUDE.md found' })],
        counts: {},
      },
      {
        scanner: 'TOK',
        status: 'ok',
        findings: [makeFinding({
          id: 'CA-TOK-001',
          scanner: 'TOK',
          severity: 'low',
          title: 'Cache-breaking volatile content at top of CLAUDE.md',
          file: '/tmp/CLAUDE.md',
        })],
        counts: {},
      },
    ],
  };
  const out = humanizeEnvelope(env);
  assert.equal(out.target_path, '/tmp');
  assert.equal(out.scanners.length, 2);
  assert.notEqual(out.scanners[0].findings[0].title, env.scanners[0].findings[0].title);
  assert.notEqual(out.scanners[1].findings[0].title, env.scanners[1].findings[0].title);
  assert.equal(out.scanners[1].findings[0].userImpactCategory, 'Wasted tokens');
});

test('humanizeEnvelope returns input unchanged if shape is wrong', () => {
  assert.equal(humanizeEnvelope(null), null);
  assert.equal(humanizeEnvelope({}).scanners, undefined);  // unchanged object
  assert.equal(humanizeEnvelope({ scanners: 'not-an-array' }).scanners, 'not-an-array');
});

// ─── new fields presence ───────────────────────────────────────────────

test('humanizeFinding always sets the three new fields', () => {
  const out = humanizeFinding(makeFinding());
  assert.equal(typeof out.userImpactCategory, 'string');
  assert.equal(typeof out.userActionLanguage, 'string');
  assert.equal(typeof out.relevanceContext, 'string');
});

// ─── ANSI-free guarantee ───────────────────────────────────────────────

test('humanized output contains no ANSI escape sequences', () => {
  const out = humanizeFinding(makeFinding({ scanner: 'CML', title: 'No CLAUDE.md found' }));
  const allText = `${out.title} ${out.description} ${out.recommendation}`;
  // eslint-disable-next-line no-control-regex
  assert.equal(/\[/.test(allText), false, 'ANSI escape detected in humanized output');
});