'use strict';

/**
 * E2E capability-wiring tests for the assumption-delta checkpoint (#1561).
 *
 * Drives the real `loop render-hooks plan:pre` CLI subprocess against temp
 * projects with different config values and asserts on the typed envelope's
 * activeHooks — proving the capability contribution activates/deactivates by
 * config (acceptance criteria #4 non-blocking advisory + #6 capability hook).
 *
 * CONTENT/E2E only: every test drives a real CLI subprocess. No readFileSync
 * source-grep. Genuine assertions: each case asserts the SPECIFIC differing
 * value (capId presence/absence), not a count (plan:pre carries other
 * default-on contributions owned by other capabilities).
 */

const { describe, test, afterEach } = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const os = require('node:os');
const path = require('node:path');
const { execFileSync } = require('node:child_process');

const { cleanup } = require('./helpers.cjs');

const TOOLS_PATH = path.join(__dirname, '..', 'gsd-core', 'bin', 'gsd-tools.cjs');

const TEST_ENV_BASE = {
  GSD_SESSION_KEY: '',
  CODEX_THREAD_ID: '',
  CLAUDE_SESSION_ID: '',
  CLAUDE_CODE_SSE_PORT: '',
  OPENCODE_SESSION_ID: '',
  GEMINI_SESSION_ID: '',
  CURSOR_SESSION_ID: '',
  WINDSURF_SESSION_ID: '',
  TERM_SESSION_ID: '',
  WT_SESSION: '',
  TMUX_PANE: '',
  ZELLIJ_SESSION_NAME: '',
  TTY: '',
  SSH_TTY: '',
};

function runTools(args, cwd) {
  const argv = Array.isArray(args)
    ? args
    : (args.match(/(?:[^\s"']+|"[^"]*"|'[^']*')+/g) || [])
        .map((t) => t.replace(/"([^"]*)"/g, '$1').replace(/'([^']*)'/g, '$1'));

  try {
    const stdout = execFileSync(process.execPath, [TOOLS_PATH, ...argv], {
      cwd,
      encoding: 'utf-8',
      env: { ...process.env, ...TEST_ENV_BASE },
      timeout: 60000,
    });
    return { success: true, output: stdout.trim(), exitCode: 0, error: '' };
  } catch (err) {
    return {
      success: false,
      output: err.stdout?.toString().trim() || '',
      error: err.stderr?.toString().trim() || err.message,
      exitCode: err.status ?? 1,
    };
  }
}

function makeProject(config) {
  const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-adelta-'));
  fs.mkdirSync(path.join(tmpDir, '.planning'), { recursive: true });
  fs.writeFileSync(
    path.join(tmpDir, '.planning', 'config.json'),
    JSON.stringify(config),
    'utf8'
  );
  return tmpDir;
}

function planPreHooks(cwd) {
  const result = runTools('loop render-hooks plan:pre --raw', cwd);
  assert.ok(result.success, `render-hooks plan:pre should succeed. stderr: ${result.error}`);
  const envelope = JSON.parse(result.output);
  assert.strictEqual(envelope.point, 'plan:pre', 'point field must be plan:pre');
  assert.ok(Array.isArray(envelope.activeHooks), 'activeHooks must be an array');
  return envelope;
}

function findCap(envelope, capId) {
  return envelope.activeHooks.find((h) => h.capId === capId) || null;
}

// ─── ROADMAP fixture for the scan query ──────────────────────────────────────
const ROADMAP = [
  '# Roadmap',
  '',
  '## v1.0.0',
  '',
  '### Phase 1: Add a second auth method alongside passwords',
  '**Goal:** Users can authenticate via SSO in addition to passwords',
  '**Success Criteria**:',
  '1. SSO login works',
  '2. Password login still works',
  '',
  '### Phase 2: Refactor the parser for readability',
  '**Goal:** Smaller functions, no behavior change',
  '**Success Criteria**:',
  '1. All existing tests still pass',
  '',
].join('\n');

function makeRoadmapProject() {
  const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-adelta-rm-'));
  fs.mkdirSync(path.join(tmpDir, '.planning'), { recursive: true });
  fs.writeFileSync(path.join(tmpDir, '.planning', 'ROADMAP.md'), ROADMAP, 'utf8');
  return tmpDir;
}

function scanQuery(cwd, phase, extra) {
  const argv = ['query', 'assumption-delta', 'scan', String(phase)];
  if (extra) argv.push(...extra);
  return runTools(argv, cwd);
}

describe('assumption-delta scan query — phase-section detection (#1561)', () => {
  let tmpDir;
  afterEach(() => { if (tmpDir) { cleanup(tmpDir); tmpDir = null; } });

  test('phase with a pluralization signal → detected:true', () => {
    tmpDir = makeRoadmapProject();
    const r = scanQuery(tmpDir, 1, ['--json']);
    assert.ok(r.success, `scan should succeed. stderr: ${r.error}`);
    const parsed = JSON.parse(r.output);
    assert.strictEqual(parsed.detected, true);
    assert.ok(parsed.signals.some((s) => s.kind === 'pluralization'), 'phase 1 must trip pluralization');
  });

  test('phase with no signal → detected:false (low false-positive)', () => {
    tmpDir = makeRoadmapProject();
    const r = scanQuery(tmpDir, 2, ['--json']);
    assert.ok(r.success, `scan should succeed. stderr: ${r.error}`);
    const parsed = JSON.parse(r.output);
    assert.strictEqual(parsed.detected, false);
    assert.deepStrictEqual(parsed.signals, []);
  });

  test('unknown phase → detected:false, no throw (graceful)', () => {
    tmpDir = makeRoadmapProject();
    const r = scanQuery(tmpDir, 999, ['--json']);
    assert.ok(r.success, `scan should succeed on unknown phase. stderr: ${r.error}`);
    assert.strictEqual(JSON.parse(r.output).detected, false);
  });

  test('--terms override narrows the vocabulary (custom cue fires, default cue does not)', () => {
    tmpDir = makeRoadmapProject();
    // phase 1 trips "second" by default; override to "xyzzy" → must NOT fire
    const r = scanQuery(tmpDir, 1, ['--json', '--terms', 'xyzzy']);
    assert.ok(r.success, `scan should succeed. stderr: ${r.error}`);
    assert.strictEqual(JSON.parse(r.output).detected, false);
  });

  test('missing phase arg → non-zero exit (usage error)', () => {
    tmpDir = makeRoadmapProject();
    const r = runTools(['query', 'assumption-delta', 'scan'], tmpDir);
    assert.notStrictEqual(r.exitCode, 0, 'scan with no phase must exit non-zero');
  });

  // ── Hardening (Codex Step-4 review): malformed args ──────────────────────
  test('flag-shaped phase (scan --json) → non-zero exit, not treated as phase', () => {
    tmpDir = makeRoadmapProject();
    const r = runTools(['query', 'assumption-delta', 'scan', '--json'], tmpDir);
    assert.notStrictEqual(r.exitCode, 0, '"--json" must not be accepted as a phase number');
  });

  test('empty --terms restores curated defaults (detected, not disabled)', () => {
    tmpDir = makeRoadmapProject();
    const r = scanQuery(tmpDir, 1, ['--terms', '', '--json']);
    assert.ok(r.success, `scan should succeed. stderr: ${r.error}`);
    const parsed = JSON.parse(r.output);
    assert.strictEqual(parsed.detected, true, 'phase 1 must still trip defaults under empty --terms');
    assert.ok(parsed.terms.pluralization.includes('second'));
  });

  test('flag-shaped --terms value (--terms --json) falls back to defaults, not treated as a term', () => {
    tmpDir = makeRoadmapProject();
    const r = scanQuery(tmpDir, 1, ['--terms', '--json']);
    assert.ok(r.success, `scan should succeed. stderr: ${r.error}`);
    const parsed = JSON.parse(r.output);
    // 'json' must NOT have been consumed as a pluralization cue; defaults apply.
    assert.ok(!parsed.terms.pluralization.includes('json'), '"--json" must not become a trigger term');
    assert.ok(parsed.terms.pluralization.includes('second'), 'defaults restored');
  });
});

describe('assumption-delta capability — plan:pre render-hooks wiring (#1561)', () => {
  let tmpDir;
  afterEach(() => { if (tmpDir) { cleanup(tmpDir); tmpDir = null; } });

  test('default config (no toggle): assumption-delta contribution is ACTIVE', () => {
    tmpDir = makeProject({});
    const env = planPreHooks(tmpDir);
    const hook = findCap(env, 'assumption-delta');
    assert.ok(hook, 'assumption-delta contribution must be active under default config');
    assert.strictEqual(hook.kind, 'contribution', 'must be a non-blocking contribution, not a gate');
    assert.strictEqual(hook.into, 'planner', 'contribution injects into the planner role');
    assert.strictEqual(hook.when, 'workflow.assumption_delta', 'when must gate on workflow.assumption_delta');
    assert.strictEqual(hook.onError, 'skip', 'onError must be skip (advisory, never halts)');
    // The fragment body must be inlined so the planner receives concrete prose.
    const frag = hook.fragment && hook.fragment.inline ? hook.fragment.inline : hook.fragment;
    assert.ok(typeof frag === 'string' && frag.length > 0, 'fragment must be inlined as non-empty text');
    assert.ok(
      /Assumption-Delta Architecture Checkpoint/i.test(frag),
      'inlined fragment must carry the checkpoint heading'
    );
  });

  test('workflow.assumption_delta=true: contribution is ACTIVE', () => {
    tmpDir = makeProject({ workflow: { assumption_delta: true } });
    const env = planPreHooks(tmpDir);
    assert.ok(findCap(env, 'assumption-delta'), 'must be active when explicitly true');
  });

  test('workflow.assumption_delta=false: contribution is INACTIVE (absent from activeHooks)', () => {
    tmpDir = makeProject({ workflow: { assumption_delta: false } });
    const env = planPreHooks(tmpDir);
    assert.strictEqual(
      findCap(env, 'assumption-delta'),
      null,
      'must NOT appear in activeHooks when disabled — other default-on plan:pre hooks may still be present'
    );
  });

  test('non-blocking guarantee: no assumption-delta entry is ever a blocking gate', () => {
    // Advisory contract (acceptance #4): the checkpoint informs; it never blocks.
    // Across both on/off states the capability must never surface as kind=gate
    // with blocking=true.
    tmpDir = makeProject({ workflow: { assumption_delta: true } });
    const env = planPreHooks(tmpDir);
    const gates = env.activeHooks.filter((h) => h.kind === 'gate');
    assert.ok(
      gates.every((g) => g.capId !== 'assumption-delta'),
      'assumption-delta must never register a blocking gate at plan:pre'
    );
  });
});