(() => {
  '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 PANEL_ID = 'eks-ai-translate-panel';
  const BUTTON_ID = 'eks-ai-translate-toggle';
  const POPOVER_ID = 'eks-ai-translate-popover';

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

  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}, #${POPOVER_ID} {
        position: fixed; z-index: 2147483000; background: #fff; color: #0f172a;
        border: 1px solid #d7dee8; border-radius: 14px;
        box-shadow: 0 18px 48px rgba(15,23,42,.28); font: 13px system-ui, sans-serif;
      }
      #${PANEL_ID} {
        right: 18px; bottom: 66px; width: min(420px, calc(100vw - 36px));
        max-height: min(720px, calc(100vh - 92px)); overflow: auto; padding: 14px;
      }
      #${POPOVER_ID} { right: 18px; top: 90px; width: min(460px, calc(100vw - 36px)); max-height: 55vh; overflow: auto; padding: 12px; }
      #${PANEL_ID}[hidden], #${POPOVER_ID}[hidden] { display: none; }
      #${PANEL_ID} h3, #${POPOVER_ID} h3 { margin: 0 0 10px; font-size: 15px; }
      #${PANEL_ID} label { display: block; margin: 10px 0 4px; font-weight: 600; }
      #${PANEL_ID} input, #${PANEL_ID} textarea {
        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, #${POPOVER_ID} .eks-row { display: flex; gap: 8px; align-items: center; }
      #${PANEL_ID} .eks-row > * { flex: 1; }
      #${PANEL_ID} button, #${POPOVER_ID} button {
        border: 0; border-radius: 8px; padding: 8px 10px; background: #1f6feb; color: white;
        font: 600 13px system-ui, sans-serif; cursor: pointer;
      }
      #${PANEL_ID} button.secondary, #${POPOVER_ID} button.secondary { background: #e2e8f0; color: #0f172a; }
      #${PANEL_ID} button:disabled, #${POPOVER_ID} button:disabled { opacity: .55; cursor: wait; }
      #${PANEL_ID} .eks-muted, #${POPOVER_ID} .eks-muted { color: #64748b; font-size: 12px; }
      #${PANEL_ID} .eks-error, #${POPOVER_ID} .eks-error { color: #b91c1c; white-space: pre-wrap; }
      #${PANEL_ID} .eks-result, #${POPOVER_ID} .eks-result { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 8px; padding: 10px; white-space: pre-wrap; min-height: 44px; }
      .eks-inline-translate {
        position: absolute !important; top: 4px !important; right: 4px !important; z-index: 6 !important;
        border: 0 !important; border-radius: 999px !important; padding: 1px 5px !important;
        background: rgba(224,242,254,.94) !important; color: #075985 !important;
        font: 700 9px system-ui, sans-serif !important; line-height: 14px !important; cursor: pointer !important;
        opacity: .72 !important; box-shadow: 0 1px 4px rgba(15,23,42,.18) !important;
      }
      .eks-inline-translate:hover { opacity: 1 !important; }
      .eks-composer-translate {
        border: 0 !important; border-radius: 999px !important; padding: 3px 7px !important;
        background: #1f6feb !important; color: white !important; font: 600 11px system-ui, sans-serif !important;
        cursor: pointer !important; margin: 0 4px !important; box-shadow: 0 2px 8px rgba(15,23,42,.16) !important;
        display: inline-flex !important; align-items: center !important; min-height: 22px !important;
      }
      .eks-composer-status { display: inline-block; margin-left: 6px; color: #64748b; font: 12px system-ui, sans-serif; }
    `;
    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(POPOVER_ID)) {
      const pop = document.createElement('section');
      pop.id = POPOVER_ID;
      pop.hidden = true;
      pop.innerHTML = `
        <div class="eks-row" style="justify-content:space-between">
          <h3>Tłumaczenie wiadomości na polski</h3>
          <button data-eks-pop="close" class="secondary" type="button">Zamknij</button>
        </div>
        <div data-eks-pop="status" class="eks-muted"></div>
        <div data-eks-pop="result" class="eks-result"></div>
        <div data-eks-pop="error" class="eks-error"></div>
      `;
      pop.querySelector('[data-eks-pop="close"]').addEventListener('click', () => { pop.hidden = true; });
      document.body.appendChild(pop);
    }

    if (document.getElementById(PANEL_ID)) return;
    const panel = document.createElement('section');
    panel.id = PANEL_ID;
    panel.hidden = true;
    panel.innerHTML = `
      <h3>EKS AI tłumaczenia</h3>
      <div class="eks-muted">Token operatora jest zapisany tylko w tej przeglądarce. Sekrety Flowise/OpenAI 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 dla wiadomości</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 na PL</button>
        <button data-eks="draft" type="button">Tekst z okna PL → język klienta</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>Status</label>
      <div data-eks="status" class="eks-muted"></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"]');
    token.value = localStorage.getItem(STORE_KEY) || '';
    token.addEventListener('change', () => localStorage.setItem(STORE_KEY, token.value.trim()));
    panel.querySelector('[data-eks="fill-selected"]').addEventListener('click', fillSelectedText);
    panel.querySelector('[data-eks="selected"]').addEventListener('click', () => translateMessageFromPanel());
    panel.querySelector('[data-eks="draft"]').addEventListener('click', () => translateAndReplaceDraft());
    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 popField(name) { return document.querySelector(`#${POPOVER_ID} [data-eks-pop="${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 el = getReplyEditorElement();
    return el ? readEditableText(el) : '';
  }

  function readEditableText(el) {
    return el ? (el.value || el.innerText || el.textContent || '') : '';
  }

  function getReplyEditorElement() {
    const active = document.activeElement;
    if (active && isReplyEditor(active)) return active;

    const explicit = document.querySelector('.reply-box__top .ProseMirror[contenteditable="true"], .reply-box__top [contenteditable="true"].ProseMirror, .reply-box__top [contenteditable="true"][translate="no"]');
    if (explicit) return explicit;

    const replyBox = document.querySelector('.reply-box__top');
    if (replyBox) {
      const editor = replyBox.querySelector('.ProseMirror[contenteditable="true"], [contenteditable="true"][role="textbox"], [contenteditable="true"]');
      if (editor) return editor;
    }

    const editors = [...document.querySelectorAll('.ProseMirror[contenteditable="true"], [contenteditable="true"][role="textbox"]')];
    return editors.find((el) => !el.closest(`#${PANEL_ID}, #${POPOVER_ID}`) && isLikelyReplyEditor(el)) || null;
  }

  function isReplyEditor(el) {
    return Boolean(el && !el.closest(`#${PANEL_ID}, #${POPOVER_ID}`) && el.closest('.reply-box__top') && (el.isContentEditable || el.classList?.contains('ProseMirror')));
  }

  function isLikelyReplyEditor(el) {
    return Boolean(el && !el.closest('.message, .message-bubble, [data-message-id]') && (el.classList?.contains('ProseMirror') || el.isContentEditable));
  }

  function getDraftElement() {
    const replyEditor = getReplyEditorElement();
    if (replyEditor) return replyEditor;
    const active = document.activeElement;
    if (active && (active.tagName === 'TEXTAREA' || active.isContentEditable) && !active.closest(`#${PANEL_ID}, #${POPOVER_ID}`)) return active;
    const editors = [...document.querySelectorAll('.ProseMirror[contenteditable="true"], [contenteditable="true"][role="textbox"], textarea')];
    return editors.find((el) => !el.closest(`#${PANEL_ID}`)) || null;
  }

  function setDraftText(el, text) {
    if (!el) return false;
    if (el.tagName === 'TEXTAREA' || el.tagName === 'INPUT') {
      el.value = text;
      el.dispatchEvent(new Event('input', { bubbles: true }));
      el.dispatchEvent(new Event('change', { bubbles: true }));
      el.focus();
      return true;
    }
    if (el.isContentEditable) {
      el.focus();
      replaceContentEditableText(el, text);
      return true;
    }
    return false;
  }

  function replaceContentEditableText(el, text) {
    el.focus();
    const selection = window.getSelection();
    const range = document.createRange();
    range.selectNodeContents(el);
    selection.removeAllRanges();
    selection.addRange(range);

    let inserted = false;
    try {
      inserted = document.execCommand && document.execCommand('insertText', false, text);
    } catch (_) {
      inserted = false;
    }

    if (!inserted) {
      const normalised = text.split(/\n{2,}/).map((block) => block.trim()).filter(Boolean);
      el.innerHTML = normalised.length
        ? normalised.map((block) => `<p>${escapeHtml(block).replace(/\n/g, '<br>')}</p>`).join('')
        : '<p></p>';
      el.dispatchEvent(new InputEvent('beforeinput', { bubbles: true, inputType: 'insertText', data: text }));
      el.dispatchEvent(new InputEvent('input', { bubbles: true, inputType: 'insertText', data: text }));
    }

    el.dispatchEvent(new Event('change', { bubbles: true }));
  }

  function escapeHtml(text) {
    return text.replace(/[&<>"]/g, (ch) => ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;' }[ch]));
  }

  async function translateAndReplaceDraft(button) {
    const el = getReplyEditorElement();
    const text = readEditableText(el).trim();
    const token = getToken();
    if (!token) {
      showPanelError('Brak Agent UI token. Otwórz raz panel „AI tłumacz” i wklej token.');
      return showComposerStatus(button, 'Brak tokenu — otwórz panel AI tłumacz.', true);
    }
    if (!el) return showComposerStatus(button, 'Nie widzę okna odpowiedzi Chatwoot.', true);
    if (!text) return showComposerStatus(button, 'Najpierw wpisz tekst po polsku w oknie odpowiedzi.', true);

    const panel = document.getElementById(PANEL_ID);
    if (!panel.hidden) {
      panelField('source').value = 'pl';
      panelField('target').value = 'auto';
      panelField('text').value = text;
      panelField('status').textContent = 'Wykrywam język klienta z pierwszej wiadomości i tłumaczę tekst z okna odpowiedzi…';
    }
    showComposerStatus(button, 'Tłumaczę…');
    const originalButtonText = button?.textContent || '';
    if (button) button.textContent = 'AI…';

    try {
      setBusy(true);
      const translated = await callTranslate('/agent-tools/translate-draft', {
        draftText: text,
        sourceLanguage: 'pl',
        targetLanguage: 'auto',
        conversationId: detectConversationId(),
      });
      state.result = translated.translatedText || '';
      if (!panel.hidden) {
        panelField('result').textContent = state.result + (translated.cached ? '\n\n[cached]' : '');
        panelField('status').textContent = `Gotowe — wstawiłem tłumaczenie do pola odpowiedzi (${translated.targetLanguage}).`;
      }
      setDraftText(el, state.result);
      showComposerStatus(button, `Gotowe (${translated.targetLanguage})`);
    } catch (err) {
      const msg = err instanceof Error ? err.message : String(err);
      showPanelError(msg);
      showComposerStatus(button, msg, true);
    } finally {
      if (button) button.textContent = originalButtonText;
      setBusy(false);
      setTimeout(() => showComposerStatus(button, ''), 3500);
    }
  }

  async function translateMessageFromPanel() {
    const text = panelField('text').value.trim();
    if (!text) return showPanelError('Brak tekstu do tłumaczenia.');
    return translateMessageText(text, detectMessageId());
  }

  async function translateMessageText(text, messageId, button) {
    const token = getToken();
    if (!token) return showPanelError('Brak Agent UI token.');
    showPopover('Tłumaczę wiadomość na polski…', '', '');
    if (button) button.textContent = '…';
    try {
      setBusy(true);
      const translated = await callTranslate('/agent-tools/translate-message', {
        sourceText: text,
        targetLanguage: 'pl',
        conversationId: detectConversationId(),
        messageId,
      });
      state.result = translated.translatedText || '';
      showPopover(translated.cached ? 'Gotowe (cache).' : 'Gotowe.', state.result, '');
      return state.result;
    } catch (err) {
      const msg = err instanceof Error ? err.message : String(err);
      showPopover('', '', msg);
    } finally {
      if (button) button.textContent = 'AI';
      setBusy(false);
    }
  }

  async function callTranslate(endpoint, payload) {
    const token = getToken();
    localStorage.setItem(STORE_KEY, token);
    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}`);
    return json;
  }

  function getToken() {
    return panelField('token')?.value.trim() || localStorage.getItem(STORE_KEY) || '';
  }

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

  function showPopover(status, result, error) {
    const pop = document.getElementById(POPOVER_ID);
    pop.hidden = false;
    popField('status').textContent = status || '';
    popField('result').textContent = result || '';
    popField('error').textContent = error || '';
  }

  function showComposerStatus(button, msg, isError = false) {
    const host = button?.parentElement;
    let el = host?.querySelector?.('.eks-composer-status');
    if (!el && host) {
      el = document.createElement('span');
      el.className = 'eks-composer-status';
      host.appendChild(el);
    }
    if (el) {
      el.textContent = msg || '';
      el.style.color = isError ? '#b91c1c' : '#64748b';
    }
  }

  function setBusy(busy) {
    state.busy = busy;
    document.querySelectorAll(`#${PANEL_ID} button, #${POPOVER_ID} button, .eks-composer-translate, .eks-inline-translate`).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;
      if (el.closest(`#${PANEL_ID}, #${POPOVER_ID}`)) return;
      el.setAttribute('data-eks-ai-bound', '1');
      if (getComputedStyle(el).position === 'static') el.style.position = 'relative';
      const btn = document.createElement('button');
      btn.type = 'button';
      btn.className = 'eks-inline-translate';
      btn.textContent = 'AI';
      btn.title = 'Przetłumacz tę wiadomość na polski';
      btn.addEventListener('click', (e) => {
        e.preventDefault(); e.stopPropagation();
        void translateMessageText(text, el.getAttribute('data-message-id') || el.getAttribute('data-id') || undefined, btn);
      });
      el.appendChild(btn);
    });
  }

  function addComposerButtons() {
    const editors = document.querySelectorAll('.reply-box__top .ProseMirror[contenteditable="true"], .reply-box__top [contenteditable="true"].ProseMirror, .reply-box__top [contenteditable="true"][translate="no"]');
    editors.forEach((el) => {
      if (el.dataset?.eksComposerBound === '1') return;
      if (el.closest(`#${PANEL_ID}, #${POPOVER_ID}`)) return;
      if (el.dataset) el.dataset.eksComposerBound = '1';
      const btn = document.createElement('button');
      btn.type = 'button';
      btn.className = 'eks-composer-translate';
      btn.textContent = 'PL→klient';
      btn.title = 'Przetłumacz wpisaną odpowiedź po polsku na język wykryty z pierwszej wiadomości klienta';
      btn.addEventListener('click', (e) => {
        e.preventDefault(); e.stopPropagation();
        void translateAndReplaceDraft(btn);
      });
      const menubar = el.closest('.ProseMirror-menubar-wrapper')?.querySelector('.ProseMirror-menubar');
      const host = menubar || el.parentElement;
      if (host) host.appendChild(btn);
    });
  }

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

  boot();
})();