(function () {
  'use strict';

  const script = document.currentScript;
  const api = (script && script.dataset && script.dataset.feiginApi) || window.FEIGIN_ENERGY_API || window.location.origin;
  const avatar = api + '/static/feigin-energy-konsultant-avatar.svg?v=5';
  const cssHref = api + '/static/widget-v2.css?v=5';

  const css = document.createElement('link');
  css.rel = 'stylesheet';
  css.href = cssHref;
  document.head.appendChild(css);

  if (document.getElementById('fec-box')) return;

  const button = document.createElement('button');
  button.id = 'fec-btn';
  button.type = 'button';
  button.innerHTML = `
    <img src="${avatar}" alt="Feigin Energy Konsultant">
    <span class="fec-btn-text">
      <span class="fec-btn-label">Energy Diagnostics</span>
      <span class="fec-btn-main">Zapytaj konsultanta</span>
    </span>`;

  const box = document.createElement('div');
  box.id = 'fec-box';
  box.innerHTML = `
    <div id="fec-head">
      <div id="fec-head-top">
        <div id="fec-avatar-wrap">
          <img id="fec-avatar" src="${avatar}" alt="Feigin Energy Konsultant">
          <span id="fec-status-dot"></span>
        </div>
        <div id="fec-title">
          <div class="fec-brand"><span class="fec-red">Feigin</span> <span class="fec-green">Electric</span><br>Energy Konsultant</div>
          <div class="fec-role">Wirtualny ekspert energetyczny<br>tekst i rozmowa głosowa</div>
        </div>
        <div class="fec-head-actions">
          <button id="fec-sound" class="fec-head-action" type="button" aria-label="Włącz lub wyłącz głos">🔊</button>
          <button id="fec-close" type="button" aria-label="Zamknij">×</button>
        </div>
      </div>
      <div id="fec-head-bottom">
        <div class="fec-metric"><b>EMS</b><span>pomiary i dane</span></div>
        <div class="fec-metric"><b>ECOD</b><span>optymalizacja</span></div>
        <div class="fec-metric"><b>PV / PQ</b><span>napięcie i jakość</span></div>
      </div>
    </div>
    <div id="fec-voice-status" class="fec-voice-status">🎙️ Słucham. Powiedz, jaki problem ma Twoja firma.</div>
    <div id="fec-log"></div>
    <div id="fec-quick">
      <button type="button" class="fec-chip">Falownik PV się wyłącza</button>
      <button type="button" class="fec-chip">Mam wysoki rachunek</button>
      <button type="button" class="fec-chip">Moc bierna na fakturze</button>
      <button type="button" class="fec-chip">Ile kosztuje ECOD?</button>
    </div>
    <div id="fec-lead">
      <div id="fec-lead-title">Zostawić kontakt do analizy?</div>
      <div class="fec-lead-grid">
        <input id="fec-lead-name" class="fec-lead-field" placeholder="Imię / firma">
        <input id="fec-lead-phone" class="fec-lead-field" placeholder="Telefon">
      </div>
      <input id="fec-lead-email" class="fec-lead-field" style="margin-top:8px;width:100%" placeholder="Email">
      <label id="fec-lead-consent"><input id="fec-lead-consent-check" type="checkbox"><span>Wyrażam zgodę na kontakt w sprawie mojego zgłoszenia.</span></label>
      <button id="fec-lead-send" type="button">Wyślij zgłoszenie do Feigin Electric</button>
      <div id="fec-lead-hint">Dane trafiają do Feigin Electric jako lead techniczno-sprzedażowy.</div>
    </div>
    <form id="fec-form">
      <input id="fec-input" placeholder="Opisz lub powiedz: napięcie, PV, rachunek, awaria..." autocomplete="off">
      <button id="fec-mic" type="button" aria-label="Rozmowa głosowa">🎙️</button>
      <button id="fec-send" type="submit">Wyślij</button>
    </form>
    <div id="fec-foot"><b>Feigin</b> <b>Electric</b> · feiginelectric.pl · konsultacja informacyjna, bez gwarancji oszczędności bez danych, pomiarów i analizy.</div>`;

  document.body.append(button, box);

  const $ = (selector) => box.querySelector(selector);
  const log = $('#fec-log');
  const input = $('#fec-input');
  const form = $('#fec-form');
  const sendButton = $('#fec-send');
  const micButton = $('#fec-mic');
  const soundButton = $('#fec-sound');
  const voiceStatus = $('#fec-voice-status');
  const closeButton = $('#fec-close');
  const leadName = $('#fec-lead-name');
  const leadPhone = $('#fec-lead-phone');
  const leadEmail = $('#fec-lead-email');
  const leadConsent = $('#fec-lead-consent-check');
  const leadSend = $('#fec-lead-send');

  let conversationId = null;
  let lastLead = null;
  let busy = false;
  let voiceEnabled = true;
  let recognition = null;
  let listening = false;
  let finalTranscript = '';
  let micPermissionReady = false;
  let voices = [];

  const maleNames = ['krzysztof', 'marek', 'jacek', 'zbigniew', 'adam', 'jan', 'male'];
  const femaleNames = ['zosia', 'paulina', 'agnieszka', 'ewa', 'maja', 'female'];

  function loadVoices() {
    if (!window.speechSynthesis) return [];
    voices = window.speechSynthesis.getVoices() || [];
    return voices;
  }

  function chooseMalePolishVoice() {
    const available = voices.length ? voices : loadVoices();
    const polish = available.filter(v => /^pl([_-]|$)/i.test(v.lang || ''));

    for (const token of maleNames) {
      const match = polish.find(v => (v.name || '').toLowerCase().includes(token));
      if (match) return match;
    }

    const neutralPolish = polish.find(v => !femaleNames.some(token => (v.name || '').toLowerCase().includes(token)));
    return neutralPolish || polish[0] || null;
  }

  function speak(text, attempt) {
    if (!voiceEnabled || !window.speechSynthesis || !text) return;
    const tryNo = attempt || 0;
    const selected = chooseMalePolishVoice();

    if (!selected && tryNo < 6) {
      setTimeout(() => speak(text, tryNo + 1), 200);
      return;
    }

    window.speechSynthesis.cancel();
    const utterance = new SpeechSynthesisUtterance(String(text).replace(/https?:\/\/\S+/g, '').slice(0, 1800));
    utterance.lang = 'pl-PL';
    utterance.rate = 0.96;
    utterance.pitch = selected ? 0.90 : 0.78;
    if (selected) utterance.voice = selected;
    window.speechSynthesis.speak(utterance);
  }

  if (window.speechSynthesis) {
    loadVoices();
    window.speechSynthesis.onvoiceschanged = loadVoices;
  }

  function addMessage(text, who, speakIt) {
    const row = document.createElement('div');
    row.className = 'fec-row ' + (who === 'user' ? 'fec-row-user' : 'fec-row-bot');

    if (who !== 'user') {
      const img = document.createElement('img');
      img.className = 'fec-mini-avatar';
      img.src = avatar;
      img.alt = '';
      row.appendChild(img);
    }

    const bubble = document.createElement('div');
    bubble.className = 'fec-msg ' + (who === 'user' ? 'fec-user' : 'fec-bot');
    bubble.innerText = text;
    row.appendChild(bubble);
    log.appendChild(row);
    log.scrollTop = log.scrollHeight;
    if (speakIt) speak(text);
    return bubble;
  }

  async function startGreeting() {
    if (log.dataset.started) return;
    log.dataset.started = '1';
    try {
      const response = await fetch(api + '/api/start-message');
      const data = await response.json();
      addMessage(data.message || 'Dzień dobry. Opisz problem z energią, PV, napięciem, rachunkiem lub mocą bierną.', 'bot', false);
    } catch (_) {
      addMessage('Dzień dobry. Opisz problem z energią, PV, napięciem, rachunkiem lub mocą bierną.', 'bot', false);
    }
  }

  function maybeShowLead(data, userText) {
    if (!data) return;
    const risk = String(data.risk || '');
    const qualification = String(data.qualification || '');
    const nextStep = String(data.next_step || '');
    const shouldShow = Boolean(data.is_lead) || risk === 'Wysokie' || risk === 'Pilny serwis' || qualification === 'MEASURE' || qualification === 'ANALYSE' || nextStep.includes('pomiar') || nextStep.includes('analiza');
    if (!shouldShow) return;

    lastLead = {
      topic: String(userText || '').slice(0, 90),
      category: data.category || 'Inne',
      problem_description: userText || '',
      urgency: (risk === 'Wysokie' || risk === 'Pilny serwis') ? 'Wysoka' : 'Średnia',
      next_step: data.next_step || 'Zebrać dane',
      source: 'Widget'
    };
    box.classList.add('fec-has-lead');
  }

  async function sendLead() {
    if (!lastLead) return addMessage('Najpierw opisz problem, potem wyślemy zgłoszenie.', 'bot', true);
    if (!leadConsent.checked) return addMessage('Do przekazania zgłoszenia potrzebujemy zgody na kontakt.', 'bot', true);

    const name = leadName.value.trim();
    const phone = leadPhone.value.trim();
    const email = leadEmail.value.trim();
    if (!name || (!phone && !email)) return addMessage('Podaj proszę imię lub nazwę firmy oraz telefon albo email.', 'bot', true);

    leadSend.disabled = true;
    leadSend.innerText = 'Wysyłam...';
    try {
      const payload = {
        ...lastLead,
        contact: {
          name_or_company: name,
          phone,
          reply_address: email,
          contact_consent: true,
          marketing_consent: false
        }
      };
      const response = await fetch(api + '/api/lead', {
        method: 'POST',
        headers: {'Content-Type': 'application/json'},
        body: JSON.stringify(payload)
      });
      if (!response.ok) throw new Error('lead_failed');
      await response.json();
      box.classList.remove('fec-has-lead');
      addMessage('Dziękuję. Zgłoszenie zostało zapisane. Feigin Electric może teraz wrócić do Ciebie z analizą lub propozycją pomiaru.', 'bot', true);
    } catch (_) {
      addMessage('Nie udało się zapisać zgłoszenia. Spróbuj ponownie albo wyślij materiały na office@feiginelectric.com.', 'bot', true);
    } finally {
      leadSend.disabled = false;
      leadSend.innerText = 'Wyślij zgłoszenie do Feigin Electric';
    }
  }

  async function sendMessage(text) {
    const clean = String(text || '').trim();
    if (!clean || busy) return;

    busy = true;
    if (window.speechSynthesis) window.speechSynthesis.cancel();
    sendButton.disabled = true;
    sendButton.innerText = 'Czekaj...';
    addMessage(clean, 'user', false);
    input.value = '';
    const loading = addMessage('Analizuję zgłoszenie: problem techniczny, ryzyko, brakujące dane i następny krok...', 'bot', false);

    try {
      const response = await fetch(api + '/api/chat', {
        method: 'POST',
        headers: {'Content-Type': 'application/json'},
        body: JSON.stringify({
          message: clean,
          conversation_id: conversationId,
          source: 'Widget',
          page_url: window.location.href
        })
      });
      if (!response.ok) throw new Error('chat_failed');
      const data = await response.json();
      conversationId = data.conversation_id || conversationId;
      loading.innerText = data.answer || 'Nie udało się wygenerować odpowiedzi.';
      maybeShowLead(data, clean);
      speak(loading.innerText);
    } catch (_) {
      loading.innerText = 'Błąd połączenia z konsultantem. Spróbuj ponownie za chwilę.';
      speak(loading.innerText);
    } finally {
      busy = false;
      sendButton.disabled = false;
      sendButton.innerText = 'Wyślij';
    }
  }

  function microphoneErrorMessage(code) {
    const insideIframe = window.self !== window.top;
    if (code === 'not-allowed' || code === 'service-not-allowed' || code === 'permission_denied' || code === 'NotAllowedError') {
      if (insideIframe) return 'Mikrofon jest blokowany przez osadzenie strony. Ramka iframe musi mieć allow="microphone; autoplay".';
      return 'Mikrofon nadal jest blokowany. Sprawdź zgodę Chrome i macOS, a następnie odśwież stronę.';
    }
    if (code === 'audio-capture' || code === 'NotFoundError') return 'Chrome nie widzi działającego mikrofonu. Sprawdź wybrane urządzenie wejściowe.';
    if (code === 'no-speech') return 'Nie wykryto mowy. Spróbuj ponownie i mów chwilę dłużej.';
    if (code === 'insecure') return 'Rozmowa głosowa wymaga bezpiecznego połączenia HTTPS.';
    return 'Nie udało się uruchomić rozmowy głosowej. Odśwież stronę i spróbuj ponownie.';
  }

  async function ensureMicrophoneAccess() {
    if (micPermissionReady) return true;
    if (!window.isSecureContext) throw new Error('insecure');
    if (window.parent && window.parent !== window) {
      window.parent.postMessage({type: 'FEIGIN_MICROPHONE_REQUIRED'}, '*');
    }
    if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
      const stream = await navigator.mediaDevices.getUserMedia({audio: true});
      stream.getTracks().forEach(track => track.stop());
    }
    micPermissionReady = true;
    return true;
  }

  const Recognition = window.SpeechRecognition || window.webkitSpeechRecognition;
  if (Recognition) {
    recognition = new Recognition();
    recognition.lang = 'pl-PL';
    recognition.continuous = false;
    recognition.interimResults = true;

    recognition.onstart = () => {
      finalTranscript = '';
      listening = true;
      micButton.classList.add('fec-listening');
      micButton.innerText = '■';
      voiceStatus.classList.add('fec-active');
    };

    recognition.onresult = (event) => {
      let interim = '';
      for (let i = event.resultIndex; i < event.results.length; i += 1) {
        const transcript = event.results[i][0].transcript;
        if (event.results[i].isFinal) finalTranscript += transcript + ' ';
        else interim += transcript;
      }
      input.value = (finalTranscript + interim).trim();
    };

    recognition.onerror = (event) => {
      addMessage(microphoneErrorMessage((event && event.error) || 'unknown'), 'bot', false);
    };

    recognition.onend = () => {
      const transcript = (finalTranscript || input.value).trim();
      listening = false;
      micButton.classList.remove('fec-listening');
      micButton.innerText = '🎙️';
      voiceStatus.classList.remove('fec-active');
      finalTranscript = '';
      if (transcript && !busy) sendMessage(transcript);
    };
  }

  button.onclick = async () => {
    box.style.display = box.style.display === 'block' ? 'none' : 'block';
    if (box.style.display === 'block') {
      await startGreeting();
      setTimeout(() => input.focus(), 50);
    } else if (window.speechSynthesis) {
      window.speechSynthesis.cancel();
    }
  };

  closeButton.onclick = () => {
    box.style.display = 'none';
    if (recognition && listening) recognition.stop();
    if (window.speechSynthesis) window.speechSynthesis.cancel();
  };

  soundButton.onclick = () => {
    voiceEnabled = !voiceEnabled;
    soundButton.innerText = voiceEnabled ? '🔊' : '🔇';
    soundButton.classList.toggle('fec-off', !voiceEnabled);
    if (!voiceEnabled && window.speechSynthesis) window.speechSynthesis.cancel();
  };

  form.onsubmit = (event) => {
    event.preventDefault();
    sendMessage(input.value);
  };

  micButton.onclick = async () => {
    if (!recognition) {
      addMessage('Ta przeglądarka nie obsługuje rozpoznawania mowy. Użyj aktualnego Chrome lub Edge.', 'bot', false);
      return;
    }
    try {
      if (listening) {
        recognition.stop();
        return;
      }
      await ensureMicrophoneAccess();
      recognition.start();
    } catch (error) {
      addMessage(microphoneErrorMessage((error && (error.name || error.message)) || 'unknown'), 'bot', false);
    }
  };

  leadSend.onclick = sendLead;
  box.querySelectorAll('.fec-chip').forEach(chip => {
    chip.onclick = () => sendMessage(chip.innerText);
  });
})();