/**
 * WebDriverIO config for Electrobun stack E2E tests.
 *
 * Uses CDP (Chrome DevTools Protocol) via CEF mode for reliable E2E automation.
 * Electrobun must be built/run with AGOR_CEF=1 to bundle CEF and expose
 * --remote-debugging-port=9222 (configured in electrobun.config.ts).
 *
 * Port conventions:
 *   9222 — CDP debugging port (CEF)
 *   9760 — Vite dev server (HMR)
 *   9761 — (reserved, was WebKitWebDriver)
 */

import { execSync, spawn } from 'node:child_process';
import { resolve, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';
import { existsSync, rmSync } from 'node:fs';
import { sharedConfig } from './wdio.shared.conf.js';
import { waitForPort } from './helpers/actions.ts';

const __dirname = dirname(fileURLToPath(import.meta.url));
const projectRoot = resolve(__dirname, '../..');
const electrobunRoot = resolve(projectRoot, 'ui-electrobun');

const CDP_PORT = 9222;

// Use the Electrobun fixture generator (different groups.json format)
let fixture;
try {
  const { createTestFixture } = await import('../../ui-electrobun/tests/e2e/fixtures.ts');
  fixture = createTestFixture('agor-ebun-cdp');
} catch {
  const { createTestFixture } = await import('./infra/fixtures.ts');
  fixture = createTestFixture('agor-ebun-cdp');
}

process.env.AGOR_TEST = '1';
process.env.AGOR_CEF = '1';
process.env.AGOR_TEST_DATA_DIR = fixture.dataDir;
process.env.AGOR_TEST_CONFIG_DIR = fixture.configDir;

console.log(`[electrobun-cdp] Test fixture at ${fixture.rootDir ?? fixture.configDir}`);

let appProcess;

export const config = {
  ...sharedConfig,

  // Use devtools protocol (CDP) instead of WebDriver
  automationProtocol: 'devtools',

  capabilities: [{
    browserName: 'chromium',
    'goog:chromeOptions': {
      debuggerAddress: `localhost:${CDP_PORT}`,
    },
  }],

  onPrepare() {
    // Find existing binary or build
    const candidates = [
      resolve(electrobunRoot, 'build/dev-linux-x64/AgentOrchestrator-dev/AgentOrchestrator-dev'),
      resolve(electrobunRoot, 'build/Agent Orchestrator'),
      resolve(electrobunRoot, 'build/AgentOrchestrator'),
    ];
    let electrobunBinary = candidates.find(p => existsSync(p));

    if (!electrobunBinary && !process.env.SKIP_BUILD) {
      console.log('[electrobun-cdp] Building with CEF...');
      try {
        execSync('npx vite build', { cwd: electrobunRoot, stdio: 'inherit' });
        execSync('electrobun build --env=dev', { cwd: electrobunRoot, stdio: 'inherit' });
      } catch (e) {
        console.warn('[electrobun-cdp] Build failed:', e.message);
      }
      electrobunBinary = candidates.find(p => existsSync(p));
    }

    if (!electrobunBinary) {
      // Fall back to `electrobun dev` which builds + launches in one step
      console.log('[electrobun-cdp] No binary found, launching via electrobun dev...');
      appProcess = spawn('electrobun', ['dev'], {
        cwd: electrobunRoot,
        env: {
          ...process.env,
          AGOR_CEF: '1',
          AGOR_TEST: '1',
          AGOR_TEST_DATA_DIR: fixture.dataDir,
          AGOR_TEST_CONFIG_DIR: fixture.configDir,
        },
        stdio: 'pipe',
      });
    } else {
      console.log(`[electrobun-cdp] Launching binary: ${electrobunBinary}`);
      appProcess = spawn(electrobunBinary, [], {
        env: {
          ...process.env,
          AGOR_CEF: '1',
          AGOR_TEST: '1',
          AGOR_TEST_DATA_DIR: fixture.dataDir,
          AGOR_TEST_CONFIG_DIR: fixture.configDir,
        },
        stdio: 'pipe',
      });
    }

    appProcess.stdout?.on('data', (d) => process.stdout.write(`[app] ${d}`));
    appProcess.stderr?.on('data', (d) => process.stderr.write(`[app] ${d}`));
    appProcess.on('exit', (code) => console.log(`[electrobun-cdp] App exited with code ${code}`));

    // Wait for CDP port to become available
    return waitForPort(CDP_PORT, 30_000);
  },

  async before() {
    // Wait for Electrobun app to render
    await browser.waitUntil(
      async () => {
        const hasEl = await browser.execute(() =>
          document.querySelector('.app-shell') !== null
          || document.querySelector('.project-grid') !== null
          || document.querySelector('.status-bar') !== null
        );
        return hasEl;
      },
      { timeout: 20_000, interval: 500, timeoutMsg: 'Electrobun app did not load in 20s' },
    );
    console.log('[electrobun-cdp] App loaded.');
  },

  onComplete() {
    if (appProcess) {
      console.log('[electrobun-cdp] Stopping app...');
      appProcess.kill('SIGTERM');
      appProcess = undefined;
    }

    const cleanup = fixture.cleanup ?? (() => {
      try {
        if (fixture.rootDir) rmSync(fixture.rootDir, { recursive: true, force: true });
      } catch { /* best-effort */ }
    });
    cleanup();
  },
};