#!/usr/bin/env node
const fs = require('fs');
const path = require('path');
const puppeteer = require('puppeteer');

function detectChromeExecutable() {
  const candidates = [];
  const cacheRoot = '/home/ubuntu/.cache/puppeteer/chrome';

  try {
    if (fs.existsSync(cacheRoot)) {
      const versions = fs.readdirSync(cacheRoot).sort().reverse();
      for (const version of versions) {
        candidates.push(path.join(cacheRoot, version, 'chrome-linux64', 'chrome'));
      }
    }
  } catch (error) {
    // Ignoramos y seguimos con rutas fijas.
  }

  if (process.env.PUPPETEER_EXECUTABLE_PATH) {
    candidates.unshift(process.env.PUPPETEER_EXECUTABLE_PATH);
  }

  candidates.push(
    '/usr/bin/google-chrome-stable',
    '/usr/bin/google-chrome',
    '/usr/bin/chromium',
    '/usr/bin/chromium-browser'
  );

  return candidates.find((candidate) => candidate && fs.existsSync(candidate)) || null;
}

function sleep(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

async function main() {
  const orderNumber = (process.argv[2] || '').trim();
  const orderCode = (process.argv[3] || '').trim();

  if (!orderNumber || !orderCode) {
    console.log(JSON.stringify({
      success: false,
      error: 'Número de orden y código de orden son requeridos.'
    }));
    process.exit(1);
  }

  const trackingUrl = `https://shalom.com.pe/rastrea/${encodeURIComponent(orderNumber)}/${encodeURIComponent(orderCode)}`;
  let browser = null;

  try {
    const executablePath = detectChromeExecutable();

    browser = await puppeteer.launch({
      headless: 'new',
      executablePath: executablePath || undefined,
      args: [
        '--no-sandbox',
        '--disable-setuid-sandbox',
        '--disable-dev-shm-usage'
      ]
    });

    const page = await browser.newPage();
    await page.setViewport({ width: 1280, height: 900 });
    await page.setUserAgent('Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36');

    await page.goto(trackingUrl, {
      waitUntil: 'networkidle2',
      timeout: 60000,
    });

    await sleep(4000);

    const payload = await page.evaluate(() => {
      const textOf = (selectorList) => {
        for (const selector of selectorList) {
          const el = document.querySelector(selector);
          const text = el && el.textContent ? el.textContent.trim() : '';
          if (text) return text;
        }
        return '';
      };

      const allParagraphs = Array.from(document.querySelectorAll('p'))
        .map((p) => (p.textContent || '').trim())
        .filter(Boolean);

      const status = textOf([
        '.text-4xl.font-bold.text-red-color-sidebar',
        '.text-3xl.font-bold.text-red-color-sidebar'
      ]);

      let description = textOf([
        'p.text-md.font-normal.text-silver-title',
        'p.text-sm.font-normal.text-silver-title'
      ]);

      if (!description) {
        description = allParagraphs.find((text) => {
          return !/^N° DE ORDEN:/i.test(text)
            && !/^Desde el/i.test(text)
            && /destino|recojo|entregado|origen|procesado|tránsito|transito/i.test(text);
        }) || '';
      }

      const orderLabel = allParagraphs.find((text) => /^N° DE ORDEN:/i.test(text)) || '';
      const dateLabel = allParagraphs.find((text) => /^Desde el/i.test(text)) || '';
      const internalOrderNumber = orderLabel.replace(/^N° DE ORDEN:\s*/i, '').trim();
      const bodyText = document.body && document.body.innerText ? document.body.innerText.trim() : '';

      return {
        status,
        description,
        orderLabel,
        dateLabel,
        internalOrderNumber,
        requiresLogin: /Inicia sesión para acceder/i.test(bodyText),
        currentUrl: location.href,
        currentPath: location.pathname,
      };
    });

    if (!payload.status || payload.currentPath === '/rastrea') {
      console.log(JSON.stringify({
        success: false,
        error: 'No se pudo encontrar la guía en el rastreo público de Shalom.',
        tracking_url: trackingUrl,
      }));
      process.exit(2);
    }

    console.log(JSON.stringify({
      success: true,
      source: 'shalom_web',
      status: payload.status,
      description: payload.description,
      internal_order_number: payload.internalOrderNumber || null,
      external_order_number: orderNumber,
      order_code: orderCode,
      date_text: payload.dateLabel || null,
      tracking_url: trackingUrl,
      requires_login: !!payload.requiresLogin,
    }));
  } catch (error) {
    console.log(JSON.stringify({
      success: false,
      error: error && error.message ? error.message : 'Error al consultar Shalom.',
      tracking_url: trackingUrl,
    }));
    process.exit(3);
  } finally {
    if (browser) {
      try {
        await browser.close();
      } catch (error) {
        // Ignoramos errores al cerrar el navegador.
      }
    }
  }
}

main();