import { describe, it, beforeEach, afterEach } from 'node:test';
import assert from 'node:assert/strict';
import { resolve, join } from 'node:path';
import { fileURLToPath } from 'node:url';
import { mkdtemp, mkdir, writeFile, rm } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import { resetCounter } from '../../scanners/lib/output.mjs';
import { discoverConfigFiles } from '../../scanners/lib/file-discovery.mjs';
import { scan } from '../../scanners/settings-validator.mjs';

const __dirname = fileURLToPath(new URL('.', import.meta.url));
const FIXTURES = resolve(__dirname, '../fixtures');

describe('SET scanner — healthy project', () => {
  let result;
  beforeEach(async () => {
    resetCounter();
    const discovery = await discoverConfigFiles(resolve(FIXTURES, 'healthy-project'));
    result = await scan(resolve(FIXTURES, 'healthy-project'), discovery);
  });

  it('returns status ok', () => {
    assert.strictEqual(result.status, 'ok');
  });

  it('has scanner prefix SET', () => {
    assert.strictEqual(result.scanner, 'SET');
  });

  it('finds no critical issues', () => {
    const critical = result.findings.filter(f => f.severity === 'critical');
    assert.strictEqual(critical.length, 0);
  });

  it('all finding IDs match CA-SET-NNN', () => {
    for (const f of result.findings) {
      assert.match(f.id, /^CA-SET-\d{3}$/);
    }
  });
});

describe('SET scanner — broken project', () => {
  let result;
  beforeEach(async () => {
    resetCounter();
    const discovery = await discoverConfigFiles(resolve(FIXTURES, 'broken-project'));
    result = await scan(resolve(FIXTURES, 'broken-project'), discovery);
  });

  it('does NOT flag an arbitrary unknown key (CC schema is passthrough)', () => {
    // M-BUG-10: "unknownKey123" is not close to any known key, so it is a
    // valid forward-compatible / passthrough key — NOT a typo. Claude Code
    // forwards unrecognized keys unchanged, so flagging it is a false positive.
    const found = result.findings.some(f => f.scanner === 'SET' && /unknownKey123/.test(f.evidence || ''));
    assert.ok(!found, 'unknownKey123 is far from every known key → must not be flagged');
  });

  it('detects deprecated key (includeCoAuthoredBy)', () => {
    // CA-SET-002 in broken-project, evidence='includeCoAuthoredBy: true'.
    const found = result.findings.some(f => f.scanner === 'SET' && /includeCoAuthoredBy/.test(f.evidence || ''));
    assert.ok(found, 'Should detect includeCoAuthoredBy');
  });

  it('detects type mismatch (alwaysThinkingEnabled as string)', () => {
    // CA-SET-003 in broken-project, evidence='alwaysThinkingEnabled: "yes" (string)'.
    const found = result.findings.some(f => f.scanner === 'SET' && /alwaysThinkingEnabled/.test(f.evidence || ''));
    assert.ok(found, 'Should detect boolean/string mismatch');
  });

  it('detects invalid effortLevel value', () => {
    // CA-SET-004 in broken-project, evidence='effortLevel: "turbo"'.
    const found = result.findings.some(f => f.scanner === 'SET' && /effortLevel:\s*"turbo"/.test(f.evidence || ''));
    assert.ok(found, 'Should detect effortLevel "turbo"');
  });

  it('detects hooks as array', () => {
    // CA-SET-006 in broken-project, evidence='"hooks": [...]'.
    const found = result.findings.some(f => f.scanner === 'SET' && /"hooks":\s*\[/.test(f.evidence || ''));
    assert.ok(found, 'Should detect hooks array format');
  });

  it('marks hooks-as-array as critical', () => {
    const f = result.findings.find(x => x.scanner === 'SET' && /"hooks":\s*\[/.test(x.evidence || ''));
    assert.strictEqual(f?.severity, 'critical');
  });
});

describe('SET scanner — additionalDirectories (v5 M6)', () => {
  it('does NOT flag additionalDirectories as unknown key', async () => {
    resetCounter();
    const path = resolve(FIXTURES, 'additional-dirs-ok');
    const discovery = await discoverConfigFiles(path);
    const result = await scan(path, discovery);
    // SET findings preserve evidence verbatim; an unknown-key finding for additionalDirectories
    // would carry "additionalDirectories" in evidence regardless of humanizer rewriting the title.
    const unknown = result.findings.find(f =>
      f.scanner === 'SET' && /additionalDirectories/.test(f.evidence || ''));
    assert.equal(unknown, undefined,
      'additionalDirectories should be in KNOWN_KEYS');
  });

  it('does NOT flag 2 entries as too many', async () => {
    resetCounter();
    const path = resolve(FIXTURES, 'additional-dirs-ok');
    const discovery = await discoverConfigFiles(path);
    const result = await scan(path, discovery);
    // The additionalDirectories threshold finding writes paths into evidence (e.g., "~/work/repo-a", ...).
    // additional-dirs-ok is below threshold, so no SET finding fires at all.
    const f = result.findings.find(x => x.scanner === 'SET');
    assert.equal(f, undefined,
      `expected no SET findings for 2 entries, got id=${f?.id}`);
  });

  it('flags > 2 entries as low finding', async () => {
    resetCounter();
    const path = resolve(FIXTURES, 'additional-dirs-many');
    const discovery = await discoverConfigFiles(path);
    const result = await scan(path, discovery);
    // CA-SET-001 in additional-dirs-many = the additionalDirectories threshold finding.
    const f = result.findings.find(x => x.scanner === 'SET' && x.id === 'CA-SET-001');
    assert.ok(f, `expected additionalDirectories threshold finding; got: ${result.findings.map(x => x.id).join(' | ')}`);
    assert.equal(f.severity, 'low', `expected low severity, got ${f.severity}`);
  });
});

describe('SET scanner — CC 2.1.114→181 valid keys (Batch 1 false-positive fix)', () => {
  // The pre-write path-guard blocks the agent from committing settings.json
  // fixtures, so this suite materializes a hermetic temp fixture at runtime.
  let tmpRoot;
  let result;

  const NEW_KEYS = [
    'sandbox', 'fallbackModel', 'enforceAvailableModels', 'disableBundledSkills',
    'pluginSuggestionMarketplaces', 'requiredMinimumVersion', 'requiredMaximumVersion',
    'allowAllClaudeAiMcps', 'footerLinksRegexes', 'wheelScrollAccelerationEnabled',
    'parentSettingsBehavior', 'skillOverrides',
  ];

  beforeEach(async () => {
    resetCounter();
    tmpRoot = await mkdtemp(join(tmpdir(), 'ca-set-2181-'));
    await mkdir(join(tmpRoot, '.claude'), { recursive: true });
    const settings = {
      $schema: 'https://json.schemastore.org/claude-code-settings.json',
      effortLevel: 'xhigh',                                      // CC 2.1.154
      sandbox: { allowAppleEvents: false },                      // CC 2.1.181
      fallbackModel: ['claude-opus-4-8', 'claude-sonnet-4-6'],   // CC 2.1.166 (string|array)
      enforceAvailableModels: true,                              // CC 2.1.175
      disableBundledSkills: true,                                // CC 2.1.169
      pluginSuggestionMarketplaces: ['acme'],                    // CC 2.1.152
      requiredMinimumVersion: '2.1.114',                         // CC 2.1.163
      requiredMaximumVersion: '2.2.0',                           // CC 2.1.163
      allowAllClaudeAiMcps: false,                               // CC 2.1.149
      footerLinksRegexes: ['^https://internal\\.'],              // CC 2.1.181
      wheelScrollAccelerationEnabled: true,                      // CC 2.1.174
      parentSettingsBehavior: 'merge',                           // CC 2.1.133
      skillOverrides: { 'example-skill': 'name-only' },          // CC 2.1.129 (per-skill object)
      permissions: { deny: ['Read(./.env)'], allow: ['Bash(npm run *)'] },
    };
    await writeFile(
      join(tmpRoot, '.claude', 'settings.json'),
      JSON.stringify(settings, null, 2) + '\n',
      'utf8',
    );
    const discovery = await discoverConfigFiles(tmpRoot);
    result = await scan(tmpRoot, discovery);
  });

  afterEach(async () => {
    if (tmpRoot) await rm(tmpRoot, { recursive: true, force: true });
  });

  it('accepts effortLevel "xhigh" (CC 2.1.154)', () => {
    const bad = result.findings.find(f => /xhigh/.test(f.evidence || ''));
    assert.equal(bad, undefined, 'xhigh must be a valid effortLevel');
  });

  for (const key of NEW_KEYS) {
    it(`does NOT flag "${key}" as an unknown key`, () => {
      const unknown = result.findings.find(f =>
        f.title === 'Unknown settings key' && f.evidence === key);
      assert.equal(unknown, undefined, `${key} should be in KNOWN_KEYS`);
    });
  }

  it('treats fallbackModel array value without a single-type mismatch', () => {
    const f = result.findings.find(x => /fallbackModel/.test(x.evidence || ''));
    assert.equal(f, undefined, 'fallbackModel (string|array) must not be type-checked');
  });

  it('produces zero findings for an all-valid CC 2.1.181 settings file', () => {
    assert.equal(result.findings.length, 0,
      `expected clean scan; got: ${result.findings.map(f => `${f.title}:${f.evidence || ''}`).join(' | ')}`);
  });
});

describe('SET scanner — unknown-key typo gate (M-BUG-10)', () => {
  // The CC settings schema is passthrough: it forwards unrecognized keys
  // unchanged rather than rejecting them, so an arbitrary unknown key is
  // valid/forward-compatible and must NOT be flagged. The only real risk is a
  // TYPO of a real key (the intended setting silently has no effect), so the
  // scanner flags ONLY unknown keys that closely match a known key.
  // Path-guard blocks committing settings.json fixtures → materialize a temp one.
  let tmpRoot;
  let result;
  const TYPO_TITLE = 'Possible typo in settings key';

  beforeEach(async () => {
    resetCounter();
    tmpRoot = await mkdtemp(join(tmpdir(), 'ca-set-typo-'));
    await mkdir(join(tmpRoot, '.claude'), { recursive: true });
    const settings = {
      $schema: 'https://json.schemastore.org/claude-code-settings.json',
      permisions: { deny: ['Read(./.env)'] },   // TYPO of "permissions" (edit distance 1)
      someNewKey2027: true,                      // forward-compat / passthrough — far from every known key
      permissions: { deny: ['Read(./.env)'], allow: ['Bash(npm run *)'] },
    };
    await writeFile(
      join(tmpRoot, '.claude', 'settings.json'),
      JSON.stringify(settings, null, 2) + '\n',
      'utf8',
    );
    const discovery = await discoverConfigFiles(tmpRoot);
    result = await scan(tmpRoot, discovery);
  });

  afterEach(async () => {
    if (tmpRoot) await rm(tmpRoot, { recursive: true, force: true });
  });

  it('flags a likely typo ("permisions") and suggests the nearest known key', () => {
    const typo = result.findings.find(f => f.scanner === 'SET' && f.evidence === 'permisions');
    assert.ok(typo, `expected a typo finding for "permisions"; got: ${result.findings.map(f => `${f.title}:${f.evidence || ''}`).join(' | ')}`);
    assert.equal(typo.title, TYPO_TITLE);
    assert.match(typo.recommendation, /permissions/, 'recommendation suggests the nearest known key');
  });

  it('marks the typo finding as low severity (passthrough → not a hard error)', () => {
    const typo = result.findings.find(f => f.scanner === 'SET' && f.evidence === 'permisions');
    assert.equal(typo.severity, 'low');
  });

  it('does NOT flag a forward-compatible key far from any known key', () => {
    const fwd = result.findings.find(f => f.scanner === 'SET' && f.evidence === 'someNewKey2027');
    assert.equal(fwd, undefined, 'someNewKey2027 is far from every known key → passthrough, not flagged');
  });

  it('emits exactly one typo finding for this file', () => {
    const typos = result.findings.filter(f => f.scanner === 'SET' && f.title === TYPO_TITLE);
    assert.equal(typos.length, 1, `expected exactly one typo finding; got: ${typos.map(f => f.evidence).join(', ')}`);
  });
});

describe('SET scanner — empty project', () => {
  let result;
  beforeEach(async () => {
    resetCounter();
    const discovery = await discoverConfigFiles(resolve(FIXTURES, 'empty-project'));
    result = await scan(resolve(FIXTURES, 'empty-project'), discovery);
  });

  it('returns skipped when no settings files', () => {
    assert.strictEqual(result.status, 'skipped');
  });

  it('has 0 findings', () => {
    assert.strictEqual(result.findings.length, 0);
  });
});

describe('SET scanner — autoMode validation (CA-SET-NNN)', () => {
  // All autoMode findings have a title starting with "autoMode".
  const AM_RE = /^autoMode/;
  const amFindings = (result) => result.findings.filter(f => f.scanner === 'SET' && AM_RE.test(f.title || ''));

  it('flags structural problems: wrong sub-key type, non-string array entry, unknown sub-key', async () => {
    resetCounter();
    // automode-structure/.claude/settings.local.json (scope=local → no dead-config):
    // environment valid; allow not-array; soft_deny ["ok",7]; bogus unknown sub-key.
    const path = resolve(FIXTURES, 'automode-structure');
    const discovery = await discoverConfigFiles(path);
    const result = await scan(path, discovery);
    const am = amFindings(result);
    const problems = am.map(f => f.details && f.details.problem).sort();
    assert.deepEqual(
      problems,
      ['not-string-array', 'not-string-array', 'unknown-subkey'],
      `Expected 2 not-string-array + 1 unknown-subkey, got ${am.map(f => f.title).join(' | ')}`
    );
    for (const f of am) {
      assert.equal(f.severity, 'medium', `structure problem is medium: ${f.title}`);
      assert.ok(/settings\.local\.json$/.test(f.file || ''), `points at the settings file: ${f.file}`);
      assert.ok(f.details && f.details.key === 'autoMode', 'details.key === autoMode');
    }
  });

  it('does NOT flag a valid string-array sub-key (incl. "$defaults")', async () => {
    resetCounter();
    const path = resolve(FIXTURES, 'automode-structure');
    const discovery = await discoverConfigFiles(path);
    const result = await scan(path, discovery);
    // environment: ["$defaults"] is valid → must not appear.
    const envFlagged = amFindings(result).some(f => /environment/.test(f.title || ''));
    assert.equal(envFlagged, false, 'a valid string array (with $defaults) is not flagged');
  });

  it('flags autoMode that is not an object', async () => {
    resetCounter();
    const path = resolve(FIXTURES, 'automode-nonobject');
    const discovery = await discoverConfigFiles(path);
    const result = await scan(path, discovery);
    const am = amFindings(result);
    assert.equal(am.length, 1, `Expected one not-an-object finding, got ${am.map(f => f.title).join(' | ')}`);
    assert.equal(am[0].details.problem, 'not-an-object');
    assert.equal(am[0].severity, 'medium');
  });

  it('flags autoMode in shared project settings as dead config (and not in local scope)', async () => {
    resetCounter();
    // automode-shared/.claude/settings.json → scope=project → dead-config.
    const sharedPath = resolve(FIXTURES, 'automode-shared');
    const sharedResult = await scan(sharedPath, await discoverConfigFiles(sharedPath));
    const dead = amFindings(sharedResult).filter(f => f.details && f.details.problem === 'shared-project-scope');
    assert.equal(dead.length, 1, 'autoMode in shared .claude/settings.json is dead config');
    assert.equal(dead[0].severity, 'low', 'dead-config is low severity');
    // valid structure → no structure findings, only the dead-config one.
    assert.equal(amFindings(sharedResult).length, 1, 'valid structure in shared scope yields only the dead-config finding');

    // The same-shaped autoMode in LOCAL scope (automode-structure) must NOT be dead config.
    resetCounter();
    const localPath = resolve(FIXTURES, 'automode-structure');
    const localResult = await scan(localPath, await discoverConfigFiles(localPath));
    const localDead = amFindings(localResult).filter(f => f.details && f.details.problem === 'shared-project-scope');
    assert.equal(localDead.length, 0, 'autoMode in settings.local.json is read by CC → not dead config');
  });

  it('does NOT flag a settings file without autoMode', async () => {
    resetCounter();
    // healthy-project has .claude/settings.json but no autoMode.
    const path = resolve(FIXTURES, 'healthy-project');
    const discovery = await discoverConfigFiles(path);
    const result = await scan(path, discovery);
    assert.equal(amFindings(result).length, 0, 'no autoMode key → no autoMode findings');
  });
});