(function() {
    tinymce.create('tinymce.plugins.AIRPPlugin', {
        init: function(editor, url) {

            function ensureAIRP() {
                if (typeof window.AIRP === 'undefined') {
                    alert('AI Related Posts non è inizializzato correttamente.');
                    return false;
                }
                return true;
            }

            function createModal() {
                if (document.getElementById('airp-modal')) {
                    return;
                }

                var style = document.createElement('style');
                style.type = 'text/css';
                style.textContent = ''
                    + '#airp-modal-backdrop{position:fixed;z-index:100000;top:0;left:0;width:100%;height:100%;'
                    + 'background:rgba(0,0,0,0.3);display:flex;align-items:center;justify-content:center;}'
                    + '#airp-modal{background:#fff;border:1px solid #ccc;border-radius:4px;max-width:600px;width:95%;'
                    + 'max-height:80%;overflow:hidden;box-shadow:0 4px 12px rgba(0,0,0,0.2);font-family:sans-serif;}'
                    + '#airp-modal-header{padding:8px 12px;border-bottom:1px solid #eee;font-weight:bold;display:flex;justify-content:space-between;align-items:center;}'
                    + '#airp-modal-body{padding:10px 12px;overflow-y:auto;max-height:calc(80vh - 80px);}'
                    + '#airp-modal-footer{padding:8px 12px;border-top:1px solid #eee;text-align:right;}'
                    + '#airp-status{font-size:11px;color:#555;margin-left:6px;}'
                    + '.airp-chip{display:inline-block;margin:2px;padding:2px 6px;background:#f0f0f0;border-radius:12px;font-size:11px;cursor:default;}'
                    + '.airp-chip-remove{cursor:pointer;margin-left:4px;}'
                    + '#airp-keywords-list{border:1px solid #ddd;min-height:28px;padding:4px;background:#fff;}'
                    + '#airp-results-list{border:1px solid #ddd;margin-top:6px;padding:4px;background:#fafafa;max-height:200px;overflow:auto;}'
                    + '#airp-results-list ul{margin:0;padding-left:16px;}'
                    + '#airp-results-list li{margin-bottom:4px;cursor:pointer;}'
                    + '#airp-results-list li span.airp-post-title{text-decoration:underline;color:#2271b1;}'
                    + '#airp-results-list small{display:block;font-size:11px;color:#666;}'
                    + '#airp-modal button{font-size:12px;}';
                document.head.appendChild(style);

                var backdrop = document.createElement('div');
                backdrop.id = 'airp-modal-backdrop';

                var modal = document.createElement('div');
                modal.id = 'airp-modal';

                var header = document.createElement('div');
                header.id = 'airp-modal-header';
                header.innerHTML = '<span>AI Related Posts</span>';

                var closeBtn = document.createElement('button');
                closeBtn.type = 'button';
                closeBtn.textContent = '×';
                closeBtn.style.border = 'none';
                closeBtn.style.background = 'transparent';
                closeBtn.style.fontSize = '18px';
                closeBtn.style.cursor = 'pointer';
                closeBtn.onclick = function() {
                    document.body.removeChild(backdrop);
                };
                header.appendChild(closeBtn);

                var body = document.createElement('div');
                body.id = 'airp-modal-body';
                body.innerHTML = ''
                    + '<p>Trova articoli correlati al contenuto di questo articolo e linkali direttamente dal testo selezionato.</p>'
                    + '<p>'
                    + '<button type="button" id="airp-btn-find" class="button button-secondary">Trova keyword</button>'
                    + '<span id="airp-status"></span>'
                    + '</p>'
                    + '<p><strong>Keyword (max 3):</strong></p>'
                    + '<div id="airp-keywords-list"><em style="color:#777;">Nessuna keyword.</em></div>'
                    + '<p style="margin-top:6px;">'
                    + '<label for="airp-new-keyword"><strong>Aggiungi keyword:</strong></label><br>'
                    + '<input type="text" id="airp-new-keyword" style="width:100%;margin-top:2px;" placeholder="Nuova keyword (max 3 totali)..." />'
                    + '<button type="button" id="airp-add-keyword" class="button" style="margin-top:4px;">Aggiungi</button>'
                    + '</p>'
                    + '<hr>'
                    + '<p>'
                    + '<button type="button" id="airp-btn-search" class="button button-primary">Cerca articoli correlati</button>'
                    + '</p>'
                    + '<div id="airp-results-list"><em>Nessuna ricerca effettuata.</em></div>';

                var footer = document.createElement('div');
                footer.id = 'airp-modal-footer';
                var closeFooterBtn = document.createElement('button');
                closeFooterBtn.type = 'button';
                closeFooterBtn.className = 'button';
                closeFooterBtn.textContent = 'Chiudi';
                closeFooterBtn.onclick = function() {
                    document.body.removeChild(backdrop);
                };
                footer.appendChild(closeFooterBtn);

                modal.appendChild(header);
                modal.appendChild(body);
                modal.appendChild(footer);
                backdrop.appendChild(modal);
                document.body.appendChild(backdrop);

                attachModalLogic(editor);
            }

            function attachModalLogic(editor) {
                var maxKeywords = (window.AIRP && AIRP.max_keywords) ? parseInt(AIRP.max_keywords, 10) : 3;
                if (!maxKeywords || maxKeywords < 1) {
                    maxKeywords = 3;
                }

                var statusEl    = document.getElementById('airp-status');
                var listEl      = document.getElementById('airp-keywords-list');
                var newKwInput  = document.getElementById('airp-new-keyword');
                var btnFind     = document.getElementById('airp-btn-find');
                var btnAdd      = document.getElementById('airp-add-keyword');
                var btnSearch   = document.getElementById('airp-btn-search');
                var resultsList = document.getElementById('airp-results-list');

                function setStatus(msg) {
                    if (!statusEl) return;
                    statusEl.textContent = msg || '';
                }

                function getKeywordsArray() {
                    var chips = listEl.querySelectorAll('.airp-chip');
                    var kws = [];
                    chips.forEach(function(ch) {
                        var kw = ch.getAttribute('data-keyword');
                        if (kw && kws.indexOf(kw) === -1) {
                            kws.push(kw);
                        }
                    });
                    return kws;
                }

                function renderKeywords(keywords) {
                    listEl.innerHTML = '';
                    if (!keywords || !keywords.length) {
                        listEl.innerHTML = '<em style="color:#777;">Nessuna keyword.</em>';
                        return;
                    }
                    keywords.forEach(function(kw) {
                        var chip = document.createElement('span');
                        chip.className = 'airp-chip';
                        chip.setAttribute('data-keyword', kw);
                        chip.textContent = kw + ' ';

                        var x = document.createElement('span');
                        x.className = 'airp-chip-remove';
                        x.textContent = '×';
                        x.onclick = function(e) {
                            e.stopPropagation();
                            chip.remove();
                            if (!getKeywordsArray().length) {
                                listEl.innerHTML = '<em style="color:#777;">Nessuna keyword.</em>';
                            }
                            setStatus('');
                        };

                        chip.appendChild(x);
                        listEl.appendChild(chip);
                    });
                }

                function addKeyword(kw) {
                    kw = (kw || '').trim();
                    if (!kw) {
                        setStatus('Inserisci una keyword valida.');
                        return;
                    }

                    var current = getKeywordsArray();
                    if (current.indexOf(kw) !== -1) {
                        setStatus('Questa keyword è già presente.');
                        return;
                    }

                    if (current.length >= maxKeywords) {
                        setStatus('Puoi usare al massimo ' + maxKeywords + ' keyword.');
                        return;
                    }

                    current.push(kw);
                    renderKeywords(current);
                    setStatus('');
                }

                btnAdd.addEventListener('click', function() {
                    var kw = newKwInput.value;
                    newKwInput.value = '';
                    addKeyword(kw);
                });

                newKwInput.addEventListener('keypress', function(e) {
                    if (e.key === 'Enter') {
                        e.preventDefault();
                        btnAdd.click();
                    }
                });

                btnFind.addEventListener('click', function() {
                    if (!ensureAIRP()) return;
                    setStatus('Analisi in corso...');

                    var content = editor.getContent({ format: 'html' }) || '';
                    var titleEl = document.getElementById('title');
                    var title   = titleEl ? titleEl.value || '' : '';

                    if (!content && !title) {
                        setStatus('Contenuto vuoto: scrivi o incolla il testo prima di analizzare.');
                        return;
                    }

                    var data = new FormData();
                    data.append('action', 'airp_find_keywords');
                    data.append('nonce', AIRP.nonce);
                    data.append('post_id', AIRP.post_id || 0);
                    data.append('content', content);
                    data.append('title', title);

                    fetch(AIRP.ajax_url, {
                        method: 'POST',
                        credentials: 'same-origin',
                        body: data
                    })
                    .then(function(res) { return res.json(); })
                    .then(function(json) {
                        if (!json || !json.success) {
                            var msg = (json && json.data && json.data.message) ? json.data.message : 'Errore sconosciuto.';
                            setStatus('Errore: ' + msg);
                            return;
                        }
                        var keywords = json.data.keywords || [];
                        if (keywords.length > maxKeywords) {
                            keywords = keywords.slice(0, maxKeywords);
                        }
                        renderKeywords(keywords);
                        setStatus('Keyword trovate.');
                    })
                    .catch(function(err) {
                        console.error('AIRP find_keywords error', err);
                        setStatus('Errore AJAX.');
                    });
                });

                btnSearch.addEventListener('click', function() {
                    if (!ensureAIRP()) return;

                    var kws = getKeywordsArray();
                    if (!kws.length) {
                        setStatus('Nessuna keyword: trovane o aggiungine almeno una.');
                        return;
                    }

                    setStatus('Ricerca in corso...');

                    var data = new FormData();
                    data.append('action', 'airp_search_related');
                    data.append('nonce', AIRP.nonce);
                    data.append('post_id', AIRP.post_id || 0);
                    data.append('keywords', kws.join(','));

                    fetch(AIRP.ajax_url, {
                        method: 'POST',
                        credentials: 'same-origin',
                        body: data
                    })
                    .then(function(res) { return res.json(); })
                    .then(function(json) {
                        resultsList.innerHTML = '';
                        if (!json || !json.success) {
                            var msg = (json && json.data && json.data.message) ? json.data.message : 'Errore sconosciuto.';
                            resultsList.innerHTML = '<p style="color:#c00;">' + msg + '</p>';
                            setStatus('Nessun risultato.');
                            return;
                        }
                        var posts = json.data.posts || [];
                        if (!posts.length) {
                            resultsList.innerHTML = '<p>Nessun articolo correlato trovato.</p>';
                            setStatus('Nessun risultato.');
                            return;
                        }

                        var ul = document.createElement('ul');

                        posts.forEach(function(p) {
                            var li = document.createElement('li');

                            var titleSpan = document.createElement('span');
                            titleSpan.className = 'airp-post-title';
                            titleSpan.textContent = p.title;

                            var dateSmall = document.createElement('small');
                            dateSmall.textContent = p.date;

                            li.appendChild(titleSpan);
                            li.appendChild(dateSmall);

                            li.addEventListener('click', function() {
                                // test selezione
                                var selectedText = editor.selection.getContent({ format: 'text' }) || '';
                                if (!selectedText) {
                                    selectedText = p.title;
                                }

                                var encodedText = editor.dom.encode(selectedText);
                                var href = p.url;

                                editor.insertContent(
                                    '<a href="' + href + '" target="_blank" rel="noopener noreferrer">' +
                                    encodedText +
                                    '</a>'
                                );

                                setStatus('Link inserito.');
                            });

                            ul.appendChild(li);
                        });

                        resultsList.appendChild(ul);
                        setStatus('Articoli trovati: ' + posts.length);
                    })
                    .catch(function(err) {
                        console.error('AIRP search_related error', err);
                        resultsList.innerHTML = '<p style="color:#c00;">Errore AJAX.</p>';
                        setStatus('Errore AJAX.');
                    });
                });
            }

            editor.addButton('airp_button', {
                text: 'AI Related Posts',
                icon: false,
                tooltip: 'Trova articoli correlati e linkali al testo selezionato',
                onclick: function() {
                    if (!ensureAIRP()) {
                        return;
                    }
                    createModal();
                }
            });
        }
    });

    tinymce.PluginManager.add('airp_plugin', tinymce.plugins.AIRPPlugin);
})();