#!/usr/bin/env npx tsx

import { mkdirSync, writeFileSync } from 'fs';
import { dirname, resolve } from 'path';
import { getPage } from './browse.js';

type NavResult = {
  requestedUrl: string;
  url: string;
  status: number | null;
  title: string;
  error?: string;
};

type RouteCheck = {
  route: string;
  result: NavResult;
  heading: string | null;
};

const DEFAULT_BASE_URL = 'http://localhost:3000';
const DEFAULT_REPORT_PATH = resolve(process.cwd(), 'scan-local-app.md');

function env(name: string): string | undefined {
  const value = process.env[name]?.trim();
  return value ? value : undefined;
}

function getRoutes(baseUrl: string): string[] {
  const routeList = env('SCAN_ROUTES');
  if (routeList) {
    return routeList
      .split(',')
      .map((route) => route.trim())
      .filter(Boolean)
      .map((route) => new URL(route, baseUrl).toString());
  }

  return [baseUrl];
}

async function gotoWithStatus(page: any, url: string): Promise<NavResult> {
  const response = await page
    .goto(url, { waitUntil: 'domcontentloaded', timeout: 60000 })
    .catch((error: unknown) => ({ error }));

  if (response?.error) {
    return {
      requestedUrl: url,
      url: page.url(),
      status: null,
      title: await page.title().catch(() => ''),
      error: String(response.error),
    };
  }

  return {
    requestedUrl: url,
    url: page.url(),
    status: response ? response.status() : null,
    title: await page.title().catch(() => ''),
  };
}

async function textOrNull(page: any, selector: string): Promise<string | null> {
  const locator = page.locator(selector).first();
  try {
    if ((await locator.count()) === 0) return null;
    const value = await locator.textContent();
    return value ? value.trim().replace(/\s+/g, ' ') : null;
  } catch {
    return null;
  }
}

async function loginIfConfigured(page: any, baseUrl: string, lines: string[]) {
  const loginPath = env('SCAN_LOGIN_PATH');
  const username = env('SCAN_USERNAME') ?? env('CLOAKBROWSER_USERNAME');
  const password = env('SCAN_PASSWORD') ?? env('CLOAKBROWSER_PASSWORD');
  const usernameSelector = env('SCAN_USERNAME_SELECTOR') ?? 'input[type="email"], input[name="email"]';
  const passwordSelector = env('SCAN_PASSWORD_SELECTOR') ?? 'input[type="password"], input[name="password"]';
  const submitSelector = env('SCAN_SUBMIT_SELECTOR') ?? 'button[type="submit"], input[type="submit"]';

  if (!loginPath) {
    lines.push('## Login');
    lines.push('- Skipped: set `SCAN_LOGIN_PATH` to enable login smoke checks.');
    lines.push('');
    return;
  }

  const loginUrl = new URL(loginPath, baseUrl).toString();
  lines.push('## Login');
  lines.push(`- Login URL: ${loginUrl}`);
  await gotoWithStatus(page, loginUrl);

  if (!username || !password) {
    lines.push('- Skipped: set `SCAN_USERNAME`/`SCAN_PASSWORD` or `CLOAKBROWSER_USERNAME`/`CLOAKBROWSER_PASSWORD`.');
    lines.push('');
    return;
  }

  await page.locator(usernameSelector).first().fill(username);
  await page.locator(passwordSelector).first().fill(password);
  await page.locator(submitSelector).first().click();
  await page.waitForTimeout(2500);

  lines.push(`- After submit URL: ${page.url()}`);
  lines.push(`- Cookie count: ${(await page.context().cookies()).length}`);
  lines.push('');
}

async function checkRoutes(page: any, baseUrl: string, lines: string[]) {
  const routes = getRoutes(baseUrl);
  const routeChecks: RouteCheck[] = [];

  for (const url of routes) {
    const result = await gotoWithStatus(page, url);
    const heading = await textOrNull(page, 'h1');
    routeChecks.push({
      route: url,
      result,
      heading,
    });
  }

  lines.push('## Route Checks');
  for (const check of routeChecks) {
    const relativeUrl = check.route.startsWith(baseUrl) ? check.route.slice(baseUrl.length) || '/' : check.route;
    const finalPath = check.result.url.startsWith(baseUrl)
      ? check.result.url.slice(baseUrl.length) || '/'
      : check.result.url;
    const suffix = check.heading ? `, h1="${check.heading}"` : '';
    const errorSuffix = check.result.error ? `, error="${check.result.error}"` : '';
    lines.push(
      `- ${relativeUrl} → status ${check.result.status ?? 'ERR'} (final ${finalPath})${suffix}${errorSuffix}`
    );
  }
  lines.push('');
}

async function main() {
  const baseUrl = env('SCAN_BASE_URL') ?? DEFAULT_BASE_URL;
  const reportPath = resolve(env('SCAN_REPORT_PATH') ?? DEFAULT_REPORT_PATH);
  const headless = (env('SCAN_HEADLESS') ?? env('CLOAKBROWSER_HEADLESS') ?? 'true') === 'true';
  const { page, browser } = await getPage({ headless });
  const lines: string[] = [];

  lines.push('# Web Automation Scan (local)');
  lines.push('');
  lines.push(`- Base URL: ${baseUrl}`);
  lines.push(`- Timestamp: ${new Date().toISOString()}`);
  lines.push(`- Headless: ${headless}`);
  lines.push(`- Report Path: ${reportPath}`);
  lines.push('');

  try {
    await loginIfConfigured(page, baseUrl, lines);
    await checkRoutes(page, baseUrl, lines);
    lines.push('## Notes');
    lines.push('- This generic smoke helper records route availability and top-level headings for a local app.');
    lines.push('- Configure login and route coverage with `SCAN_*` environment variables.');
  } finally {
    await browser.close();
  }

  mkdirSync(dirname(reportPath), { recursive: true });
  writeFileSync(reportPath, `${lines.join('\n')}\n`, 'utf-8');
  console.log(`Report written to ${reportPath}`);
}

main().catch((error) => {
  console.error(error);
  process.exitCode = 1;
});