(() => {
  const inputFile = document.querySelector('#inputFile');
  const fileInfo = document.querySelector('#fileInfo');
  const startButton = document.querySelector('#startButton');
  const stopButton = document.querySelector('#stopButton');
  const delayInput = document.querySelector('#delayMs');
  const status = document.querySelector('#status');
  let records = [];

  function updateLoadedFile(fileName) {
    fileInfo.textContent = `${fileName}: ${records.length} veljavnih zapisov`;
    startButton.disabled = records.length === 0;
  }

  function setStatus(text) { status.textContent = text; }

  function parseLine(line) {
    const trimmed = line.trim();
    if (!trimmed || trimmed.startsWith('#')) return null;
    // Prefer tab, then semicolon, then comma; exactly two fields are required.
    const separator = trimmed.includes('\t') ? '\t' : (trimmed.includes(';') ? ';' : ',');
    const fields = trimmed.split(separator).map((field) => field.trim().replace(/^"|"$/g, ''));
    if (fields.length !== 2 || !fields[0] || !fields[1]) return null;
    const header = `${fields[0]} ${fields[1]}`.toLocaleLowerCase('sl');
    if (header.includes('katastr') && header.includes('parcel')) return null;
    if (!/^\d+$/.test(fields[0]) || /^0+$/.test(fields[0])) return null;
    return { koNumber: fields[0], parcel: fields[1] };
  }

  inputFile.addEventListener('change', async () => {
    const file = inputFile.files?.[0];
    if (!file) return;
    const lines = (await file.text()).split(/\r?\n/);
    records = lines.map(parseLine).filter(Boolean);
    await browser.storage.local.set({ batchInput: { fileName: file.name, records } });
    updateLoadedFile(file.name);
    setStatus(records.length ? 'Pripravljeno za trenutni zavihek.' : 'Ni veljavnih zapisov.');
  });

  browser.storage.local.get('batchInput').then(({ batchInput }) => {
    if (!batchInput || !Array.isArray(batchInput.records) || !batchInput.records.length) return;
    records = batchInput.records;
    updateLoadedFile(batchInput.fileName || 'Shranjena vhodna datoteka');
    setStatus('Naložena je zadnja izbrana vhodna datoteka.');
  });

  startButton.addEventListener('click', async () => {
    if (!records.length) return;
    const [tab] = await browser.tabs.query({ active: true, currentWindow: true });
    if (!tab?.id) { setStatus('Ciljnega zavihka ni mogoče najti.'); return; }
    const confirmMode = document.querySelector('input[name="confirmMode"]:checked').value;
    const delayMs = Math.max(500, Number.parseInt(delayInput.value, 10) || 1500);
    try {
      const response = await browser.tabs.sendMessage(tab.id, { type: 'START_BATCH', records, confirmMode, delayMs });
      setStatus(response?.message || 'Obdelava zagnana.');
    } catch (error) {
      setStatus(`Napaka: odprite ciljno stran in poskusite znova. ${error.message}`);
    }
  });

  stopButton.addEventListener('click', async () => {
    const [tab] = await browser.tabs.query({ active: true, currentWindow: true });
    if (!tab?.id) { setStatus('Ciljnega zavihka ni mogoče najti.'); return; }
    try {
      const response = await browser.tabs.sendMessage(tab.id, { type: 'STOP_BATCH' });
      setStatus(response?.message || 'Zahteva za ustavitev poslana.');
    } catch (error) {
      setStatus(`Napaka: odprite ciljno stran in poskusite znova. ${error.message}`);
    }
  });

  browser.runtime.onMessage.addListener((message) => {
    if (message.type === 'BATCH_STATUS') setStatus(message.text);
  });
})();