import { test } from 'node:test';
import { strict as assert } from 'node:assert';
import { spawnSync } from 'node:child_process';
import { mkdtempSync, writeFileSync, rmSync, symlinkSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';
import { validateReviewContent } from '../../lib/validators/review-validator.mjs';

const VALIDATOR = join(dirname(fileURLToPath(import.meta.url)), '..', '..', 'lib', 'validators', 'review-validator.mjs');

const GOOD_REVIEW = `---
type: trekreview
review_version: "1.0"
created: 2026-05-01
task: "Add JWT auth"
slug: jwt-auth
project_dir: .claude/projects/2026-04-30-jwt-auth/
brief_path: .claude/projects/2026-04-30-jwt-auth/brief.md
scope_sha_start: abc123
scope_sha_end: def456
reviewed_files_count: 7
verdict: ALLOW
findings:
  - 0123456789abcdef0123456789abcdef01234567
  - fedcba9876543210fedcba9876543210fedcba98
---

# Review

## Executive Summary

Verdict: ALLOW.

## Coverage

| File | Treatment | Reason |
|------|-----------|--------|
| lib/foo.mjs | deep-review | risk |

## Remediation Summary

None.
`;

test('validateReview — happy path', () => {
  const r = validateReviewContent(GOOD_REVIEW, { strict: true });
  assert.equal(r.valid, true, JSON.stringify(r.errors));
});

test('validateReview — wrong type rejected (REVIEW_WRONG_TYPE)', () => {
  const t = GOOD_REVIEW.replace('type: trekreview', 'type: trekbrief');
  const r = validateReviewContent(t);
  assert.equal(r.valid, false);
  assert.ok(r.errors.find(e => e.code === 'REVIEW_WRONG_TYPE'));
});

test('validateReview — missing required field (REVIEW_MISSING_FIELD)', () => {
  const t = GOOD_REVIEW.replace(/^brief_path: .*\n/m, '');
  const r = validateReviewContent(t);
  assert.equal(r.valid, false);
  assert.ok(r.errors.find(e => e.code === 'REVIEW_MISSING_FIELD' && /brief_path/.test(e.message)));
});

test('validateReview — missing required body section in strict (REVIEW_MISSING_SECTION)', () => {
  const t = GOOD_REVIEW.replace(/## Coverage[\s\S]*?(?=## Remediation)/m, '');
  const r = validateReviewContent(t, { strict: true });
  assert.equal(r.valid, false);
  assert.ok(r.errors.find(e => e.code === 'REVIEW_MISSING_SECTION' && /Coverage/.test(e.message)));
});

test('validateReview — Coverage section is REQUIRED (no soft demotion to make Coverage optional)', () => {
  const t = GOOD_REVIEW.replace(/## Coverage[\s\S]*?(?=## Remediation)/m, '');
  const r = validateReviewContent(t, { strict: true });
  assert.equal(r.valid, false);
});

test('validateReview — soft mode demotes section errors to warnings', () => {
  const t = GOOD_REVIEW.replace(/## Remediation Summary[\s\S]*$/m, '');
  const r = validateReviewContent(t, { strict: false });
  assert.equal(r.valid, true);
  assert.ok(r.warnings.find(w => w.code === 'REVIEW_MISSING_SECTION'));
});

test('validateReview — missing frontmatter is hard error (FM_MISSING)', () => {
  const r = validateReviewContent('# review\n\nno frontmatter\n');
  assert.equal(r.valid, false);
  assert.ok(r.errors.find(e => e.code === 'FM_MISSING'));
});

test('validateReview — findings not an array → REVIEW_BAD_FINDINGS_TYPE', () => {
  // Replace block-style list with scalar → parser yields string
  const t = GOOD_REVIEW.replace(
    /findings:\n  - 0123[\s\S]*?- fedcba[0-9a-f]+/,
    'findings: not-an-array',
  );
  const r = validateReviewContent(t);
  assert.equal(r.valid, false);
  assert.ok(
    r.errors.find(e => e.code === 'REVIEW_BAD_FINDINGS_TYPE'),
    `expected REVIEW_BAD_FINDINGS_TYPE, got: ${JSON.stringify(r.errors)}`,
  );
});

test('validateReview — finding-ID not 40-char hex → REVIEW_BAD_FINDING_ID', () => {
  const t = GOOD_REVIEW.replace(
    '0123456789abcdef0123456789abcdef01234567',
    'NOT-A-VALID-HEX-ID',
  );
  const r = validateReviewContent(t);
  assert.equal(r.valid, false);
  assert.ok(r.errors.find(e => e.code === 'REVIEW_BAD_FINDING_ID'));
});

test('validateReview — empty findings array is acceptable (no findings = ALLOW verdict)', () => {
  const t = GOOD_REVIEW.replace(
    /findings:\n  - 0123[\s\S]*?- fedcba[0-9a-f]+/,
    'findings: []',
  );
  const r = validateReviewContent(t);
  assert.equal(r.valid, true, JSON.stringify(r.errors));
});

// ---- K7: the verdict is required in review.md (ordre 5) ----------------------

const NO_VERDICT = GOOD_REVIEW.replace(/^verdict: .*\n/m, '');

test('validateReview — strict mode rejects a review.md without verdict (REVIEW_MISSING_VERDICT)', () => {
  assert.ok(!/^verdict:/m.test(NO_VERDICT), 'fixture control: the verdict line is gone');
  const r = validateReviewContent(NO_VERDICT, { strict: true });
  assert.equal(r.valid, false, 'a review without a verdict must not pass the write-time check');
  assert.ok(r.errors.find(e => e.code === 'REVIEW_MISSING_VERDICT'), JSON.stringify(r.errors));
});

test('validateReview — soft (read-time) mode only warns on a missing verdict (N-1 window for 1.0 reviews)', () => {
  const r = validateReviewContent(NO_VERDICT, { strict: false });
  assert.equal(r.valid, true, JSON.stringify(r.errors));
  assert.ok(r.warnings.find(w => w.code === 'REVIEW_MISSING_VERDICT'));
});

test('validateReview — a verdict outside ALLOW|WARN|BLOCK is an error in both modes', () => {
  const t = GOOD_REVIEW.replace('verdict: ALLOW', 'verdict: PASS');
  for (const strict of [true, false]) {
    const r = validateReviewContent(t, { strict });
    assert.equal(r.valid, false);
    assert.ok(r.errors.find(e => e.code === 'REVIEW_BAD_VERDICT'));
  }
});

// ---- A BLOCKER is written as a plan step Handover 6 can append (ordre 5) ----

const BLOCKER_ID = '763d174e6c519fafbadcba5d1706708479e36e61';
const WITH_BLOCKER = GOOD_REVIEW.replace('verdict: ALLOW', 'verdict: BLOCK') + `
\`\`\`json
{"verdict": "BLOCK", "counts": {"BLOCKER": 1, "MAJOR": 0, "MINOR": 0, "SUGGESTION": 0},
 "findings": [{"id": "${BLOCKER_ID}", "severity": "BLOCKER", "rule_key": "UNIMPLEMENTED_CRITERION", "file": "lib/login.mjs", "line": 23}]}
\`\`\`
`;
const STEP = `
## Remediation Steps

### Step R1: Return 401 on a bad password

- **Files:** \`lib/login.mjs\`
- **Source finding:** \`${BLOCKER_ID}\`
- **Verify:** re-run /trekreview → finding \`${BLOCKER_ID}\` absent
`;

test('validateReview — strict: a BLOCKER without a numbered remediation step is an error', () => {
  const r = validateReviewContent(WITH_BLOCKER, { strict: true });
  assert.equal(r.valid, false);
  assert.ok(r.errors.find(e => e.code === 'REVIEW_MISSING_REMEDIATION_STEP'), JSON.stringify(r.errors));
});

test('validateReview — strict: a BLOCKER with its "Step R1 … Source finding" passes', () => {
  const t = WITH_BLOCKER.replace('## Remediation Summary', `${STEP}\n## Remediation Summary`);
  const r = validateReviewContent(t, { strict: true });
  assert.equal(r.valid, true, JSON.stringify(r.errors));
});

test('validateReview — soft: a missing remediation step only warns', () => {
  const r = validateReviewContent(WITH_BLOCKER, { strict: false });
  assert.equal(r.valid, true);
  assert.ok(r.warnings.find(w => w.code === 'REVIEW_MISSING_REMEDIATION_STEP'));
});

test('validateReview — a clean review with zero findings validates with `findings: []` (a bare `findings:` does not)', () => {
  const ids = /findings:\n(?:  - [0-9a-f]{40}\n)+/;
  assert.match(GOOD_REVIEW, ids, 'fixture control');
  assert.equal(validateReviewContent(GOOD_REVIEW.replace(ids, 'findings: []\n'), { strict: true }).valid, true);
  assert.equal(validateReviewContent(GOOD_REVIEW.replace(ids, 'findings:\n'), { strict: true }).valid, false);
});

test('review-validator CLI — run through a symlink and a path with a space it still validates (exit 1, not a silent 0)', () => {
  const dir = mkdtempSync(join(tmpdir(), 'review validator '));
  try {
    const link = join(dir, 'validator link.mjs');
    symlinkSync(VALIDATOR, link);
    const p = join(dir, 'no verdict.md');
    writeFileSync(p, NO_VERDICT);
    const r = spawnSync(process.execPath, [link, p], { encoding: 'utf-8' });
    assert.equal(r.status, 1, r.stdout + r.stderr);
    assert.match(r.stderr, /REVIEW_MISSING_VERDICT/);
  } finally {
    rmSync(dir, { recursive: true, force: true });
  }
});