(() => {
  'use strict';

  if (window.__EKS_CHATWOOT_AI_TOOLS__) return;
  window.__EKS_CHATWOOT_AI_TOOLS__ = true;

  const RELAY_ORIGIN = new URL(document.currentScript?.src || 'https://eks-relay.easyklima.com/chatwoot-ai-tools.js').origin;
  const STORE_KEY = 'eksAgentUiToken';
  const LANG_KEY = 'eksAgentUiTargetLanguage';
  const PANEL_ID = 'eks-ai-translate-panel';
  const BUTTON_ID = 'eks-ai-translate-toggle';

  const state = {
    busy: false,
    result: '',
    error: '',
  };

  function t(s) { return s; }

  function ensureStyles() {
    if (document.getElementById('eks-ai-translate-styles')) return;
    const style = document.createElement('style');
    style.id = 'eks-ai-translate-styles';
    style.textContent = `
      #${BUTTON_ID} {
        position: fixed; right: 18px; bottom: 18px; z-index: 2147483000;
        border: 0; border-radius: 999px; padding: 10px 14px;
        background: #1f6feb; color: white; font: 600 13px system-ui, sans-serif;
        box-shadow: 0 8px 22px rgba(15,23,42,.25); cursor: pointer;
      }
      #${PANEL_ID} {
        position: fixed; right: 18px; bottom: 66px; z-index: 2147483000;
        width: min(420px, calc(100vw - 36px)); max-height: min(720px, calc(100vh - 92px));
        overflow: auto; background: #fff; color: #0f172a; border: 1px solid #d7dee8;
        border-radius: 14px; box-shadow: 0 18px 48px rgba(15,23,42,.28);
        padding: 14px; font: 13px system-ui, sans-serif;
      }
      #${PANEL_ID}[hidden] { display: none; }
      #${PANEL_ID} h3 { margin: 0 0 10px; font-size: 15px; }
      #${PANEL_ID} label { display: block; margin: 10px 0 4px; font-weight: 600; }
      #${PANEL_ID} input, #${PANEL_ID} textarea, #${PANEL_ID} select {
        width: 100%; box-sizing: border-box; border: 1px solid #cbd5e1; border-radius: 8px;
        padding: 8px; font: 13px system-ui, sans-serif; background: #fff; color: #0f172a;
      }
      #${PANEL_ID} textarea { min-height: 88px; resize: vertical; }
      #${PANEL_ID} .eks-row { display: flex; gap: 8px; align-items: center; }
      #${PANEL_ID} .eks-row > * { flex: 1; }
      #${PANEL_ID} button {
        border: 0; border-radius: 8px; padding: 8px 10px; background: #1f6feb; color: white;
        font: 600 13px system-ui, sans-serif; cursor: pointer;
      }
      #${PANEL_ID} button.secondary { background: #e2e8f0; color: #0f172a; }
      #${PANEL_ID} button.danger { background: #b91c1c; }
      #${PANEL_ID} button:disabled { opacity: .55; cursor: wait; }
      #${PANEL_ID} .eks-muted { color: #64748b; font-size: 12px; }
      #${PANEL_ID} .eks-error { color: #b91c1c; white-space: pre-wrap; }
      #${PANEL_ID} .eks-result { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 8px; padding: 10px; white-space: pre-wrap; min-height: 44px; }
      .eks-inline-translate {
        margin-left: 6px !important; border: 0 !important; border-radius: 999px !important;
        padding: 3px 7px !important; background: #e0f2fe !important; color: #075985 !important;
        font: 600 11px system-ui, sans-serif !important; cursor: pointer !important;
      }
    `;
    document.head.appendChild(style);
  }

  function makeUi() {
    ensureStyles();
    if (!document.getElementById(BUTTON_ID)) {
      const toggle = document.createElement('button');
      toggle.id = BUTTON_ID;
      toggle.type = 'button';
      toggle.textContent = 'AI tłumacz';
      toggle.addEventListener('click', () => {
        const panel = document.getElementById(PANEL_ID);
        panel.hidden = !panel.hidden;
        if (!panel.hidden) fillSelectedText();
      });
      document.body.appendChild(toggle);
    }

    if (document.getElementById(PANEL_ID)) return;
    const panel = document.createElement('section');
    panel.id = PANEL_ID;
    panel.hidden = true;
    panel.innerHTML = `
      <h3>${t('EKS AI tłumaczenia')}</h3>
      <div class="eks-muted">Token operatora jest zapisany tylko w tej przeglądarce. OpenAI/Flowise sekrety zostają po stronie EKSRelay.</div>
      <label>Agent UI token</label>
      <input data-eks="token" type="password" autocomplete="off" placeholder="Wklej token operatora" />
      <div class="eks-row">
        <div>
          <label>Język docelowy</label>
          <input data-eks="target" value="pl" placeholder="pl, en, de, cs..." />
        </div>
        <div>
          <label>Źródłowy</label>
          <input data-eks="source" value="auto" placeholder="auto" />
        </div>
      </div>
      <label>Tekst do tłumaczenia</label>
      <textarea data-eks="text" placeholder="Zaznacz tekst wiadomości albo wklej go tutaj"></textarea>
      <div class="eks-row" style="margin-top:8px">
        <button data-eks="selected" type="button">Tłumacz wiadomość</button>
        <button data-eks="draft" type="button">Tłumacz draft</button>
      </div>
      <div class="eks-row" style="margin-top:8px">
        <button data-eks="fill-selected" class="secondary" type="button">Wstaw zaznaczenie</button>
        <button data-eks="copy" class="secondary" type="button">Kopiuj wynik</button>
        <button data-eks="close" class="secondary" type="button">Zamknij</button>
      </div>
      <label>Wynik</label>
      <div data-eks="result" class="eks-result"></div>
      <div data-eks="error" class="eks-error"></div>
    `;
    document.body.appendChild(panel);

    const token = panel.querySelector('[data-eks="token"]');
    const target = panel.querySelector('[data-eks="target"]');
    token.value = localStorage.getItem(STORE_KEY) || '';
    target.value = localStorage.getItem(LANG_KEY) || 'pl';
    token.addEventListener('change', () => localStorage.setItem(STORE_KEY, token.value.trim()));
    target.addEventListener('change', () => localStorage.setItem(LANG_KEY, target.value.trim() || 'pl'));
    panel.querySelector('[data-eks="fill-selected"]').addEventListener('click', fillSelectedText);
    panel.querySelector('[data-eks="selected"]').addEventListener('click', () => translate('message'));
    panel.querySelector('[data-eks="draft"]').addEventListener('click', () => translate('draft'));
    panel.querySelector('[data-eks="copy"]').addEventListener('click', copyResult);
    panel.querySelector('[data-eks="close"]').addEventListener('click', () => { panel.hidden = true; });
  }

  function panelField(name) {
    return document.querySelector(`#${PANEL_ID} [data-eks="${name}"]`);
  }

  function fillSelectedText() {
    const selected = String(window.getSelection?.() || '').trim();
    if (selected) panelField('text').value = selected;
    else {
      const draft = getDraftText();
      if (draft) panelField('text').value = draft;
    }
  }

  function getDraftText() {
    const active = document.activeElement;
    if (active && (active.tagName === 'TEXTAREA' || active.tagName === 'INPUT')) return active.value || '';
    if (active?.isContentEditable) return active.innerText || active.textContent || '';
    const candidate = document.querySelector('[contenteditable="true"][role="textbox"], textarea');
    return candidate ? (candidate.value || candidate.innerText || candidate.textContent || '') : '';
  }

  async function translate(mode) {
    const token = panelField('token').value.trim();
    const targetLanguage = panelField('target').value.trim() || 'pl';
    const sourceLanguageRaw = panelField('source').value.trim();
    let text = panelField('text').value.trim();
    if (mode === 'draft' && !text) text = getDraftText().trim();
    if (!token) return showError('Brak Agent UI token.');
    if (!text) return showError('Brak tekstu do tłumaczenia.');
    localStorage.setItem(STORE_KEY, token);
    localStorage.setItem(LANG_KEY, targetLanguage);

    setBusy(true);
    showError('');
    panelField('result').textContent = '';
    try {
      const endpoint = mode === 'draft' ? '/agent-tools/translate-draft' : '/agent-tools/translate-message';
      const payload = {
        targetLanguage,
        sourceLanguage: sourceLanguageRaw && sourceLanguageRaw !== 'auto' ? sourceLanguageRaw : undefined,
        conversationId: detectConversationId(),
        ...(mode === 'draft' ? { draftText: text } : { sourceText: text, messageId: detectMessageId() }),
      };
      const res = await fetch(`${RELAY_ORIGIN}${endpoint}`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json', Authorization: `Bearer ${token}` },
        body: JSON.stringify(payload),
      });
      const json = await res.json().catch(() => null);
      if (!res.ok || !json?.ok) throw new Error(json?.message || `HTTP ${res.status}`);
      state.result = json.translatedText || '';
      panelField('result').textContent = state.result + (json.cached ? '\n\n[cached]' : '');
    } catch (err) {
      showError(err instanceof Error ? err.message : String(err));
    } finally {
      setBusy(false);
    }
  }

  function detectConversationId() {
    const m = location.pathname.match(/conversations\/(\d+)/) || location.hash.match(/conversations\/(\d+)/);
    return m ? Number(m[1]) : undefined;
  }

  function detectMessageId() {
    const el = window.getSelection?.()?.anchorNode?.parentElement?.closest?.('[data-message-id], [data-id]');
    return el?.getAttribute('data-message-id') || el?.getAttribute('data-id') || undefined;
  }

  async function copyResult() {
    if (!state.result) return;
    await navigator.clipboard.writeText(state.result);
  }

  function showError(msg) {
    state.error = msg;
    const el = panelField('error');
    if (el) el.textContent = msg;
  }

  function setBusy(busy) {
    state.busy = busy;
    document.querySelectorAll(`#${PANEL_ID} button`).forEach((btn) => { btn.disabled = busy; });
  }

  function addInlineButtons() {
    const candidates = document.querySelectorAll('[data-message-id]:not([data-eks-ai-bound]), .message-bubble:not([data-eks-ai-bound]), [class*="message"]:not([data-eks-ai-bound])');
    candidates.forEach((el) => {
      const text = (el.innerText || '').trim();
      if (text.length < 12 || text.length > 5000) return;
      el.setAttribute('data-eks-ai-bound', '1');
      const btn = document.createElement('button');
      btn.type = 'button';
      btn.className = 'eks-inline-translate';
      btn.textContent = 'AI→PL';
      btn.addEventListener('click', (e) => {
        e.preventDefault(); e.stopPropagation();
        const panel = document.getElementById(PANEL_ID);
        panel.hidden = false;
        panelField('target').value = localStorage.getItem(LANG_KEY) || 'pl';
        panelField('text').value = text;
      });
      el.appendChild(btn);
    });
  }

  function boot() {
    if (!document.body) return setTimeout(boot, 200);
    makeUi();
    addInlineButtons();
    const obs = new MutationObserver(() => addInlineButtons());
    obs.observe(document.body, { childList: true, subtree: true });
  }

  boot();
})();