import assert from 'node:assert/strict';
import { EventEmitter } from 'node:events';
import fs from 'node:fs/promises';
import os from 'node:os';
import path from 'node:path';
import test from 'node:test';
import {
  createAiderExecutorAdapter,
  createGoosedExecutorAdapter,
  createOpenHandsExecutorAdapter,
} from './executor-adapters.mjs';

function request(executor = 'goosed') {
  return {
    executor,
    task: {
      instruction: 'Fix the validation',
      workspaceRef: { kind: 'workspace-alias', id: 'canary' },
    },
  };
}

function sseResponse(events) {
  const encoder = new TextEncoder();
  const body = new ReadableStream({
    start(controller) {
      for (const event of events) {
        controller.enqueue(encoder.encode(
          `event: ${event.type}\ndata: ${JSON.stringify(event.data)}\n\n`,
        ));
      }
      controller.close();
    },
  });
  return new Response(body, {
    status: 200,
    headers: { 'content-type': 'text/event-stream' },
  });
}

test('Goosed adapter uses the current session API, streams bounded metadata and returns refs', async () => {
  const calls = [];
  const emitted = [];
  const adapter = createGoosedExecutorAdapter({
    baseUrl: 'http://127.0.0.1:18006',
    secret: 'secret',
    workspaceResolver: async () => '/tmp/canary',
    fetchImpl: async (url, init) => {
      calls.push({ url, init });
      if (url.endsWith('/agent/start')) {
        return Response.json({ id: 'session-1' });
      }
      if (url.endsWith('/events')) {
        return sseResponse([
          { type: 'message', data: { type: 'message', secret: 'not-projected' } },
          { type: 'finish', data: { type: 'finish' } },
        ]);
      }
      if (url.endsWith('/reply')) return Response.json({ ok: true });
      throw new Error(`Unexpected URL: ${url}`);
    },
  });
  const result = await adapter.submit(request(), {
    jobId: 'job-1',
    emit: async (type, data) => emitted.push({ type, data }),
  });
  assert.deepEqual(result.artifactRefs, [{ kind: 'goosed-session', id: 'session-1' }]);
  assert.equal(result.metrics.eventCount, 2);
  assert.equal(calls[0].url, 'http://127.0.0.1:18006/agent/start');
  assert.equal(calls[0].init.headers['X-Secret-Key'], 'secret');
  assert.equal(JSON.parse(calls[0].init.body).working_dir, '/tmp/canary');
  assert.equal(
    JSON.parse(calls.find((call) => call.url.endsWith('/reply')).init.body)
      .user_message.content[0].text,
    'Fix the validation',
  );
  assert.deepEqual(
    emitted.map((event) => event.type),
    [
      'executor_job_session_created',
      'executor_job_adapter_event',
      'executor_job_adapter_event',
    ],
  );
  assert.equal(JSON.stringify(emitted).includes('not-projected'), false);
});

test('Goosed adapter rejects remote targets unless explicitly allowed', () => {
  assert.throws(
    () => createGoosedExecutorAdapter({ baseUrl: 'https://executor.example.com' }),
    /explicit allowRemote/,
  );
  assert.doesNotThrow(
    () => createGoosedExecutorAdapter({
      baseUrl: 'https://executor.example.com',
      allowRemote: true,
    }),
  );
  assert.throws(
    () => createGoosedExecutorAdapter({
      baseUrl: 'https://executor.example.com',
      allowRemote: true,
      tlsInsecure: true,
    }),
    /restricted to local targets/,
  );
  assert.doesNotThrow(
    () => createGoosedExecutorAdapter({
      baseUrl: 'https://host.docker.internal:18006',
      allowRemote: true,
      tlsInsecure: true,
    }),
  );
});

test('Aider process adapter resolves a workspace alias and never invokes a shell', async () => {
  const root = await fs.mkdtemp(path.join(os.tmpdir(), 'memind-executor-'));
  const workspace = path.join(root, 'canary');
  await fs.mkdir(workspace);
  const spawnCalls = [];
  const emitted = [];
  const spawnImpl = (command, args, options) => {
    spawnCalls.push({ command, args, options });
    const child = new EventEmitter();
    child.stdout = new EventEmitter();
    child.stderr = new EventEmitter();
    child.kill = () => {};
    queueMicrotask(() => {
      child.stdout.emit('data', Buffer.from('done'));
      child.emit('exit', 0, null);
    });
    return child;
  };
  try {
    const adapter = createAiderExecutorAdapter({
      command: '/usr/local/bin/aider',
      allowedRoot: root,
      workspaceAliases: { canary: workspace },
      spawnImpl,
    });
    const result = await adapter.submit(request('aider'), {
      jobId: 'job-1',
      emit: async (type, data) => emitted.push({ type, data }),
    });
    assert.equal(result.outcome, 'completed');
    assert.deepEqual(result.artifactRefs, [{ kind: 'workspace-alias', id: 'canary' }]);
    assert.equal(spawnCalls[0].options.cwd, await fs.realpath(workspace));
    assert.equal(spawnCalls[0].options.shell, false);
    assert.deepEqual(
      spawnCalls[0].args,
      ['--yes-always', '--message', 'Fix the validation'],
    );
    assert.equal(emitted[0].data.stream, 'stdout');
    assert.equal('HOME' in spawnCalls[0].options.env, false);
  } finally {
    await fs.rm(root, { recursive: true, force: true });
  }
});

test('OpenHands adapter refuses workspace aliases outside its isolated root', async () => {
  const root = await fs.mkdtemp(path.join(os.tmpdir(), 'memind-executor-root-'));
  const outside = await fs.mkdtemp(path.join(os.tmpdir(), 'memind-executor-outside-'));
  try {
    const adapter = createOpenHandsExecutorAdapter({
      command: '/usr/local/bin/openhands',
      allowedRoot: root,
      workspaceAliases: { canary: outside },
    });
    await assert.rejects(
      adapter.submit(request('openhands'), { jobId: 'job-1' }),
      (error) => error.code === 'EXECUTOR_WORKSPACE_OUTSIDE_ROOT',
    );
  } finally {
    await fs.rm(root, { recursive: true, force: true });
    await fs.rm(outside, { recursive: true, force: true });
  }
});