// tests/commands/ultracontinue.test.mjs
// Regression tests for /ultracontinue-local (commands/ultracontinue-local.md).
//
// Steps 2 + 4 of the v3.4.1 hot-fix plan
// (project 2026-05-04-v3.3.1-ultracontinue-fixes).
//
// Pattern mix:
//   - Pattern B (tmp-dir, mkdtempSync + try/finally) — fixture builds
//   - Pattern D (markdown structure) — assertions against command prose
//   - Hook integration via runHook + pre-bash-executor (Pattern C, Step 4)

import { test } from 'node:test';
import { strict as assert } from 'node:assert';
import { mkdtempSync, mkdirSync, writeFileSync, readFileSync, rmSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';
import { runHook } from '../helpers/hook-helper.mjs';

const HERE = dirname(fileURLToPath(import.meta.url));
const ROOT = join(HERE, '..', '..');
const COMMAND_FILE = join(ROOT, 'commands', 'ultracontinue-local.md');
const PRE_BASH = join(ROOT, 'hooks', 'scripts', 'pre-bash-executor.mjs');

function readCommand() {
  return readFileSync(COMMAND_FILE, 'utf8');
}

function extractPhase(commandText, phaseHeader) {
  // phaseHeader e.g. "## Phase 0 ", "## Phase 1 ", "## Phase 2 "
  const startIdx = commandText.indexOf(phaseHeader);
  if (startIdx === -1) return '';
  const rest = commandText.slice(startIdx);
  // Stop at the next "## Phase " (or "## Hard rules" — also a top-level break)
  const nextPhase = rest.search(/\n## (?:Phase |Hard )/);
  if (nextPhase === -1) return rest;
  return rest.slice(0, nextPhase);
}

function inProgressState(updatedAtIso) {
  return {
    schema_version: 1,
    project: '.claude/projects/2026-05-04-fixture-a',
    next_session_brief_path: '.claude/projects/2026-05-04-fixture-a/brief.md',
    next_session_label: 'Session 2: in progress fixture',
    status: 'in_progress',
    updated_at: updatedAtIso,
  };
}

function completedState(updatedAtIso) {
  return {
    schema_version: 1,
    project: '.claude/projects/2026-05-04-fixture-b',
    next_session_brief_path: '.claude/projects/2026-05-04-fixture-b/brief.md',
    next_session_label: 'Session N: completed fixture',
    status: 'completed',
    updated_at: updatedAtIso,
  };
}

// ---------------------------------------------------------------
// Step 2 — Bug 1 regression tests (SC-1, SC-2)
// ---------------------------------------------------------------

test('ultracontinue Bug 1 — Phase 1 documents auto-discovery sort by Date.parse(updated_at) DESC', () => {
  // Fixture-builds two project dirs and verifies our chosen sort key
  // matches what Phase 1 prose documents.
  const root = mkdtempSync(join(tmpdir(), 'ultracontinue-disc-'));
  try {
    const projectsRoot = join(root, '.claude', 'projects');
    mkdirSync(join(projectsRoot, '2026-05-04-fixture-a'), { recursive: true });
    mkdirSync(join(projectsRoot, '2026-05-04-fixture-b'), { recursive: true });

    const inProgress = inProgressState('2026-05-04T18:00:00.000Z');
    const completed = completedState('2026-05-03T09:00:00.000Z');

    writeFileSync(
      join(projectsRoot, '2026-05-04-fixture-a', '.session-state.local.json'),
      JSON.stringify(inProgress, null, 2),
    );
    writeFileSync(
      join(projectsRoot, '2026-05-04-fixture-b', '.session-state.local.json'),
      JSON.stringify(completed, null, 2),
    );

    // Numeric sort by Date.parse — newest first.
    const candidates = [
      { ...completed, _path: 'b' },
      { ...inProgress, _path: 'a' },
    ].sort((x, y) => Date.parse(y.updated_at) - Date.parse(x.updated_at));
    assert.equal(candidates[0]._path, 'a', 'newest in_progress fixture must win the sort');

    const phase1 = extractPhase(readCommand(), '## Phase 1 ');
    assert.match(
      phase1,
      /Date\.parse/,
      'Phase 1 prose must document Date.parse-based sort (numeric, not lexicographic)',
    );
  } finally {
    rmSync(root, { recursive: true, force: true });
  }
});

test('ultracontinue Bug 1 — Phase 0 dispatches via parsed flags, not substring contains', () => {
  const phase0 = extractPhase(readCommand(), '## Phase 0 ');
  // Must NOT use the legacy "contains --help or -h" substring dispatch.
  assert.doesNotMatch(
    phase0,
    /contains\s+`?--help`?\s+or\s+`?-h`?/i,
    'Phase 0 must not dispatch via substring `contains` — use parsed flags / positional',
  );
  // Must reference parseArgs / flags['--help'] / positional[0] (parsed-arg dispatch).
  const referencesParsedDispatch =
    /flags\[\s*['"]--help['"]\s*\]/.test(phase0) ||
    /positional\[\s*0\s*\]/.test(phase0);
  assert.ok(
    referencesParsedDispatch,
    'Phase 0 must dispatch via parsed flags["--help"] or positional[0] === "-h"',
  );
});

test('ultracontinue Bug 1 — Phase 1 documents empty-args path explicitly to auto-discovery', () => {
  const phase1 = extractPhase(readCommand(), '## Phase 1 ');
  // Some explicit text mentioning the empty / whitespace path so a future reader
  // can't misread Phase 0 as "fall through to usage on empty".
  assert.match(
    phase1,
    /\b(empty|whitespace)\b/i,
    'Phase 1 must explicitly handle the empty-args case (auto-discovery)',
  );
  assert.match(
    phase1,
    /auto-discover/i,
    'Phase 1 must reference auto-discovery as the empty-args fallback',
  );
});

test('ultracontinue Bug 1 sub — Phase 1 emits SC-2 diagnostic for .md positional arg', () => {
  const phase1 = extractPhase(readCommand(), '## Phase 1 ');
  // SC-2 verbatim diagnostic strings.
  assert.match(
    phase1,
    /expected.*<project-dir>/i,
    'Phase 1 must mention "expected <project-dir>" in the .md-arg diagnostic',
  );
  assert.match(
    phase1,
    /did you mean to paste/i,
    'Phase 1 must mention "did you mean to paste" in the .md-arg diagnostic',
  );
  // Detection condition must reference .md.
  assert.match(
    phase1,
    /\.md\b/,
    'Phase 1 must detect .md positional arg (case for SC-2)',
  );
});

// ---------------------------------------------------------------
// Step 4 — Bug 2 regression tests (SC-3)
// ---------------------------------------------------------------

test('ultracontinue Bug 2 — pre-bash-executor ALLOWS resolved validator invocation', async () => {
  // (d-1) Sanity-check that the planned Phase 2 Bash form (validator
  // invocation with a concrete absolute path) is not blocked by the
  // marketplace pre-bash-executor hook chain.
  const cmd = "node lib/validators/session-state-validator.mjs --json /tmp/fixture-not-real/.session-state.local.json";
  const { code } = await runHook(PRE_BASH, { tool_name: 'Bash', tool_input: { command: cmd } });
  assert.strictEqual(code, 0, 'pre-bash-executor must not block resolved validator invocations');
});

test('ultracontinue Bug 2 — Phase 2 contains no {state-file-path} or any {curly-template} placeholder', () => {
  // (d-2) Pattern D structure test. The fix must eliminate the
  // {state-file-path} placeholder and any other {anything} curly-brace
  // template syntax from Phase 2 — substitution failures are the
  // root cause of the path-guard hook crash.
  const phase2 = extractPhase(readCommand(), '## Phase 2 ');
  assert.equal(
    phase2.includes('{state-file-path}'),
    false,
    'Phase 2 must not contain the {state-file-path} placeholder',
  );
  assert.doesNotMatch(
    phase2,
    /\{[a-z][a-z0-9-]*\}/,
    'Phase 2 must not contain any {lowercase-template} curly-brace placeholder',
  );
  assert.match(
    phase2,
    /Read tool/,
    'Phase 2 must document the deterministic Read tool flow',
  );
});