'use strict';
/**
 * state-command-cutover.test.cjs — ADR-2346 (epic #2345) P1 equivalence tests.
 *
 * Verifies that `state`, after cutover from the hardcoded `case 'state':` arm
 * in msd-tools.cjs to the host dispatch table (dispatchHostCommand, consulted
 * in runCommand's `default` case), behaves identically to the old inline case.
 *
 * Dispatch path after cutover:
 *   runCommand default → dispatchHostCommand → HOST_COMMAND_ROUTERS.state
 *     → routeStateCommand({ state, args, cwd, raw, error })
 *
 * Test categories (mirrors tests/audit-command-cutover.test.cjs):
 *   1. UNIT        — dispatchHostCommand return values + prototype-pollution guard
 *   2. DISPATCH    — `state <sub>` reaches the router via the host table (end-to-end)
 *   3. BEHAVIOR    — real output-shape assertions for `state load` + unknown subcommand
 *   4. JSON-ERRORS — unknown subcommand produces the canonical error
 *   5. REGISTRY    — HOST_COMMAND_ROUTERS owns `state`
 */

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

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

// msd-tools.cjs is hand-authored (committed, not generated) — safe to require.
const {
  dispatchHostCommand,
  HOST_COMMAND_ROUTERS,
} = require('../msd-core/bin/msd-tools.cjs');

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

function makeErrorRecorder() {
  const calls = [];
  const fn = (msg, reason) => calls.push({ msg, reason });
  fn.calls = calls;
  return fn;
}

// ─── 1. UNIT — dispatchHostCommand return values + pollution guard ───────────

describe('dispatchHostCommand: unit', async () => {
  const CWD = '/fake/cwd';
  const RAW = false;

  test('returns true for the migrated `state` command (consumed)', async () => {
    // routeStateCommand will run against a fake cwd; it may call error() for a
    // missing subcommand — that is fine, we only assert the dispatch returned
    // true (consumed) rather than falling through to "Unknown command".
    const errFn = makeErrorRecorder();
    const consumed = await dispatchHostCommand({
      command: 'state',
      args: ['state'],
      cwd: CWD,
      raw: RAW,
      error: errFn,
    });
    assert.strictEqual(consumed, true, 'state must be consumed by the host table');
  });

  test('all migrated Tier-1 host commands are consumed by the host table', async () => {
    // Each migrated router receives its module-scope lib via the table entry;
    // against a fake cwd it may emit an error (missing subcommand), but the
    // dispatch itself must report consumed=true (no fall-through to the
    // unknown-command error).
    // NOTE: `capability` (P2) and the P3 routers are omitted from this INVOCATION
    // loop — they delegate to module functions (commands.cmd*, config.cmd*,
    // _dispatchNonFamily, require()) that call the MODULE-SCOPE error() (which
    // exits the process) rather than the injected mock. They are covered by the
    // registry-ownership assertion below (non-invoking) and by their own
    // dedicated behavioral test suites (resolve/git/config/research tests).
    for (const cmd of ['state', 'phase', 'init', 'roadmap', 'validate', 'verify']) {
      const errFn = makeErrorRecorder();
      const consumed = await dispatchHostCommand({
        command: cmd,
        args: [cmd],
        cwd: CWD,
        raw: RAW,
        error: errFn,
      });
      assert.strictEqual(consumed, true, `${cmd} must be consumed by the host table`);
    }
  });

  test('returns false for an unknown command (fall through)', async () => {
    const errFn = makeErrorRecorder();
    const consumed = await dispatchHostCommand({
      command: 'not-a-real-command',
      args: ['not-a-real-command'],
      cwd: CWD,
      raw: RAW,
      error: errFn,
    });
    assert.strictEqual(consumed, false, 'unknown command must fall through');
    assert.strictEqual(errFn.calls.length, 0, 'error must not be called for a miss');
  });

  test('prototype-pollution guard: __proto__/constructor/prototype fall through', async () => {
    for (const bad of ['__proto__', 'constructor', 'prototype']) {
      const errFn = makeErrorRecorder();
      const consumed = await dispatchHostCommand({
        command: bad,
        args: [bad],
        cwd: CWD,
        raw: RAW,
        error: errFn,
      });
      assert.strictEqual(consumed, false, `${bad} must not be dispatched`);
      assert.strictEqual(errFn.calls.length, 0, `${bad} must not call error`);
    }
  });
});

// ─── 2 + 3. DISPATCH + BEHAVIOR — end-to-end via runMsdTools ─────────────────

describe('state cutover: end-to-end dispatch via the host table', async () => {
  let tmpDir;

  beforeEach(() => {
    tmpDir = createTempProject();
  });

  afterEach(() => {
    cleanup(tmpDir);
  });

  test('`state load` succeeds end-to-end (dispatched via host table, not a case arm)', async () => {
    // Seed a minimal STATE.md so `state load` has something to read.
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'STATE.md'),
      '# Project State\n\n## Current Position\n\nPhase: 1 of 1 (Test)\n',
    );

    const result = runMsdTools(['--cwd=' + tmpDir, 'state', 'load'], process.cwd());
    assert.strictEqual(
      result.success,
      true,
      `state load must succeed via the host-table dispatch path; got: ${result.error}`,
    );
  });

  test('unknown state subcommand surfaces the canonical unknown-subcommand error (non-zero exit)', async () => {
    const result = runMsdTools(['--cwd=' + tmpDir, 'state', 'totally-not-a-subcommand'], process.cwd());
    assert.strictEqual(result.success, false, 'unknown subcommand must exit non-zero');
    assert.ok(
      result.error.length > 0,
      'an error message must be emitted for an unknown state subcommand',
    );
  });
});

// ─── 5. REGISTRY — HOST_COMMAND_ROUTERS owns `state` ────────────────────────

describe('HOST_COMMAND_ROUTERS registry', async () => {
  test('owns all migrated host commands as function entries (P1+P2+P3)', async () => {
    const allHostCommands = [
      // P1 Tier-1 host routers
      'state', 'phase', 'init', 'roadmap', 'validate', 'verify',
      // P2 capability router
      'capability',
      // P3 resolve/git/config/research routers (ADR-2346 P3)
      'resolve-model', 'resolve-granularity', 'resolve-execution',
      'git',
      'config-ensure-section', 'config-set', 'config-set-model-profile',
      'config-get', 'config-new-project', 'config-path', 'migrate-config',
      'research-store', 'research-plan',
      // P4 all remaining leaf commands (ADR-2346 P4)
      'agent', 'smart-entry', 'check', 'find-phase', 'commit', 'check-commit',
      'commit-to-subrepo', 'pr-subrepo', 'verify-summary', 'template', 'task',
      'frontmatter', 'eval', 'verification', 'generate-slug', 'current-timestamp',
      'project-instruction-file', 'list-todos', 'list-seeds', 'verify-path-exists',
      'quick-tasks-append', 'normalize-test-command', 'dispatch-should-flatten',
      'agent-skills', 'skill-manifest', 'history-digest', 'phases',
      'assumption-delta', 'requirements', 'gap-analysis', 'milestone', 'progress',
      'uat', 'stats', 'todo', 'scaffold', 'loop', 'phase-plan-index',
      'state-snapshot', 'summary-extract', 'websearch', 'workstream', 'worktree',
      'docs-init', 'learnings', 'teams-status', 'detect-custom-files',
      'from-gsd2', 'prompt-budget', 'update-context', 'classify-confidence',
      'package-legitimacy', 'effort', 'user-story', 'drift-guard',
    ];
    for (const cmd of allHostCommands) {
      assert.ok(
        Object.prototype.hasOwnProperty.call(HOST_COMMAND_ROUTERS, cmd),
        `HOST_COMMAND_ROUTERS must own \`${cmd}\``,
      );
      assert.strictEqual(typeof HOST_COMMAND_ROUTERS[cmd], 'function', `${cmd} entry must be a function`);
    }
  });

  test('does NOT own prototype-pollution keys', async () => {
    assert.ok(
      !Object.prototype.hasOwnProperty.call(HOST_COMMAND_ROUTERS, '__proto__'),
      'HOST_COMMAND_ROUTERS must not own __proto__',
    );
    assert.ok(
      !Object.prototype.hasOwnProperty.call(HOST_COMMAND_ROUTERS, 'constructor'),
      'HOST_COMMAND_ROUTERS must not own constructor',
    );
  });
});