// navbench Playwright driver — one process per measurement mode.

// Usage: node pw_target.mjs <mode> <url-template-or-url> [n]

// Modes: coldstart | navread | act | crawl

// Set CDP_URL env to connect to an external CDP endpoint (Lightpanda) instead

// of launching Chromium.

const t0 = Date.now();

const mode = process.argv[2];

const url = process.argv[3];

const n = parseInt(process.argv[4] || '1', 10);

const CDP = process.env.CDP_URL;

const { chromium } = await import('playwright');

let browser;

if (CDP) {

let ok = false;

for (let i = 0; i < 60 && !ok; i++) {

try { browser = await chromium.connectOverCDP(CDP); ok = true; }

catch { await new Promise(r => setTimeout(r, 250)); }

}

if (!ok) { console.log(JSON.stringify({ error: 'CDP connect failed: ' + CDP })); process.exit(1); }

} else {

browser = await chromium.launch();

}

const launchMs = Date.now() - t0;

const ctx = await browser.newContext({ viewport: { width: 1280, height: 800 } });

const page = await ctx.newPage();

const out = { launchMs };

if (mode === 'coldstart') {

await page.goto(url, { waitUntil: 'load', timeout: 30000 });

const text = await page.evaluate(() => document.body.innerText);

out.navreadMs = Date.now() - t0 - launchMs;

out.len = text.length;

} else if (mode === 'navread') {

const times = [];

for (let i = 0; i < n; i++) {

const u = url.replace('{i}', String(i).padStart(3, '0'));

const s = Date.now();

await page.goto(u, { waitUntil: 'load', timeout: 30000 });

await page.evaluate(() => document.body.innerText);

times.push(Date.now() - s);

}

out.times = times;

} else if (mode === 'act') {

await page.goto(url, { waitUntil: 'load', timeout: 30000 });

const times = [];

for (let i = 0; i < n; i++) {

const s = Date.now();

await page.fill('#name', 'agent ' + i);

await page.click('#go');

times.push(Date.now() - s);

}

out.times = times;

} else if (mode === 'crawl') {

const s = Date.now();

let done = 0;

for (let i = 0; i < n; i++) {

const u = url.replace('{i}', String(i).padStart(3, '0'));

await page.goto(u, { waitUntil: 'load', timeout: 30000 });

await page.evaluate(() => document.body.innerText);

done++;

}

out.wallMs = Date.now() - s;

out.done = done;

} else {

out.error = 'unknown mode ' + mode;

}

console.log(JSON.stringify(out));

await browser.close();

process.exit(0);