// Elementi DOM
const inputText = document.getElementById('inputText');
const outputText = document.getElementById('outputText');
const translateBtn = document.getElementById('translateBtn');
const detectedLang = document.getElementById('detectedLang');
const clearBtn = document.getElementById('clearBtn');
const copyBtn = document.getElementById('copyBtn');
const charCount = document.getElementById('charCount');
const statusIndicator = document.getElementById('statusIndicator');
const settingsBtn = document.getElementById('settingsBtn');
const settingsModal = document.getElementById('settingsModal');
const closeModal = document.getElementById('closeModal');
const baseUrlInput = document.getElementById('baseUrl');
const modelSelect = document.getElementById('modelSelect');
const refreshModels = document.getElementById('refreshModels');
const saveSettings = document.getElementById('saveSettings');
const toast = document.getElementById('toast');

// Stato applicazione
let isTranslating = false;
let currentDetectedLang = null;

// Carica impostazioni salvate
function loadSettings() {
    const savedBaseUrl = localStorage.getItem('ollamaBaseUrl') || 'http://localhost:11434';
    const savedModel = localStorage.getItem('ollamaModel') || '';
    
    baseUrlInput.value = savedBaseUrl;
    
    if (savedModel) {
        const existingOption = Array.from(modelSelect.options).find(opt => opt.value === savedModel);
        if (!existingOption) {
            const option = document.createElement('option');
            option.value = savedModel;
            option.textContent = savedModel;
            modelSelect.appendChild(option);
        }
        modelSelect.value = savedModel;
    }
}

// Salva impostazioni
function saveSettingsData() {
    const baseUrl = baseUrlInput.value.trim() || 'http://localhost:11434';
    const model = modelSelect.value;
    
    localStorage.setItem('ollamaBaseUrl', baseUrl);
    localStorage.setItem('ollamaModel', model);
    
    closeSettingsModal();
    showToast('Impostazioni salvate!');
}

// Carica modelli disponibili
async function loadAvailableModels() {
    const baseUrl = baseUrlInput.value.trim() || 'http://localhost:11434';
    
    console.log('DEBUG - Tentativo di caricare modelli da:', baseUrl);
    console.log('DEBUG - electronAPI disponibile?', !!window.electronAPI);
    console.log('DEBUG - getModels funzione?', typeof window.electronAPI?.getModels);
    
    refreshModels.disabled = true;
    refreshModels.innerHTML = `
        <svg class="spin" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
            <polyline points="23 4 23 10 17 10"/>
            <polyline points="1 20 1 14 7 14"/>
            <path d="M3.51 9a9 9 0 0 1 14.85-3.36L23 10M1 14l4.64 4.36A9 9 0 0 0 20.49 15"/>
        </svg>
        Caricamento...
    `;
    
    try {
        const cleanBaseUrl = baseUrl.trim();
        console.log('Tentativo connessione a:', cleanBaseUrl);
        const result = await window.electronAPI.getModels(cleanBaseUrl);
        
        if (result.success) {
            modelSelect.innerHTML = '<option value="">Seleziona un modello...</option>';
            
            result.models.forEach(model => {
                const option = document.createElement('option');
                option.value = model.name;
                option.textContent = model.name;
                modelSelect.appendChild(option);
            });
            
            const savedModel = localStorage.getItem('ollamaModel');
            if (savedModel && result.models.find(m => m.name === savedModel)) {
                modelSelect.value = savedModel;
            }
            
            showToast(`${result.models.length} modelli trovati!`);
        } else {
            showToast('Errore: ' + result.error, 'error');
        }
    } catch (error) {
        console.error('Errore completo:', error);
        showToast('Errore di connessione: ' + (error.message || 'Verifica che Ollama sia in esecuzione'), 'error');
    } finally {
        refreshModels.disabled = false;
        refreshModels.innerHTML = `
            <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                <polyline points="23 4 23 10 17 10"/>
                <polyline points="1 20 1 14 7 14"/>
                <path d="M3.51 9a9 9 0 0 1 14.85-3.36L23 10M1 14l4.64 4.36A9 9 0 0 0 20.49 15"/>
            </svg>
            Aggiorna
        `;
    }
}

// Rileva la lingua del testo
function detectLanguage(text) {
    if (!text.trim()) {
        currentDetectedLang = null;
        detectedLang.textContent = 'Rilevamento automatico...';
        detectedLang.className = '';
        return null;
    }
    
    // Caratteri italiani comuni
    const italianChars = /[àèéìòùÀÈÉÌÒÙ]/;
    const italianWords = /\b(ciao|grazie|buongiorno|come|sono|per|con|su|tra|fra|nel|del|degli|della)\b/gi;
    
    // Caratteri inglesi comuni (rari in italiano)
    const englishChars = /[wkyjWQX]/;
    const englishWords = /\b(the|and|for|are|with|you|that|have|this|from|they|we|say|her|she|or|an|will|my|one|all|would|there|their|what|so|up|out|if|about|who|get|which|go|me|when|make|can|like|time|no|just|him|know|take|people|into|year|your|good|some|could|them|see|other|than|then|now|look|only|come|its|over|think|also|back|after|use|two|how|our|work|first|well|way|even|new|want|because|any|these|give|day|most|us)\b/gi;
    
    const hasItalianChars = italianChars.test(text);
    const hasItalianWords = (text.match(italianWords) || []).length;
    const hasEnglishChars = englishChars.test(text);
    const hasEnglishWords = (text.match(englishWords) || []).length;
    
    // Logica di rilevamento
    let detected = null;
    
    if (hasItalianChars) {
        detected = 'it';
    } else if (hasEnglishChars && !hasItalianWords) {
        detected = 'en';
    } else if (hasItalianWords > hasEnglishWords) {
        detected = 'it';
    } else if (hasEnglishWords > italianWords) {
        detected = 'en';
    } else {
        // Fallback: verifica la distribuzione delle vocali
        const vowels = text.toLowerCase().match(/[aeiou]/g) || [];
        const yCount = (text.match(/y/gi) || []).length;
        if (yCount > 0) {
            detected = 'en';
        } else {
            detected = 'it'; // default
        }
    }
    
    currentDetectedLang = detected;
    updateLanguageIndicator();
    return detected;
}

// Aggiorna l'indicatore di lingua
function updateLanguageIndicator() {
    if (currentDetectedLang === 'it') {
        detectedLang.innerHTML = '🇮🇹 Italiano → 🇬🇧 Inglese';
        detectedLang.className = 'detected-it';
    } else if (currentDetectedLang === 'en') {
        detectedLang.innerHTML = '🇬🇧 Inglese → 🇮🇹 Italiano';
        detectedLang.className = 'detected-en';
    } else {
        detectedLang.textContent = 'Rilevamento automatico...';
        detectedLang.className = '';
    }
}

// Traduci testo
async function translateText() {
    const text = inputText.value.trim();
    
    if (!text) {
        showToast('Inserisci del testo da tradurre', 'warning');
        return;
    }
    
    const baseUrl = localStorage.getItem('ollamaBaseUrl') || 'http://localhost:11434';
    const model = localStorage.getItem('ollamaModel');
    
    if (!model) {
        showToast('Configura un modello nelle impostazioni', 'warning');
        openSettingsModal();
        return;
    }
    
    // Rileva la lingua se non già rilevata
    const detected = currentDetectedLang || detectLanguage(text);
    if (!detected) {
        showToast('Impossibile rilevare la lingua', 'warning');
        return;
    }
    
    const direction = detected === 'en' ? 'en-it' : 'it-en';
    
    isTranslating = true;
    translateBtn.disabled = true;
    translateBtn.innerHTML = `
        <span class="spinner"></span>
        <span class="btn-text">Traduzione...</span>
    `;
    statusIndicator.className = 'status-indicator translating';
    
    try {
        const result = await window.electronAPI.translateText({
            text,
            direction,
            model,
            baseUrl
        });
        
        if (result.success) {
            outputText.value = result.translation.trim();
            statusIndicator.className = 'status-indicator success';
            showToast('Traduzione completata!', 'success');
        } else {
            outputText.value = '';
            statusIndicator.className = 'status-indicator error';
            showToast('Errore: ' + result.error, 'error');
        }
    } catch (error) {
        outputText.value = '';
        statusIndicator.className = 'status-indicator error';
        showToast('Errore: ' + error.message, 'error');
    } finally {
        isTranslating = false;
        translateBtn.disabled = false;
        translateBtn.innerHTML = `
            <span class="btn-text">Traduci</span>
            <svg class="btn-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                <path d="M5 12h14"/>
                <path d="M12 5l7 7-7 7"/>
            </svg>
        `;
    }
}

// Aggiorna conteggio caratteri
function updateCharCount() {
    const count = inputText.value.length;
    charCount.textContent = `${count} caratter${count === 1 ? 'e' : 'i'}`;
}

// Copia negli appunti
async function copyToClipboard() {
    const text = outputText.value;
    if (!text) return;
    
    try {
        await navigator.clipboard.writeText(text);
        showToast('Testo copiato!', 'success');
    } catch (err) {
        outputText.select();
        document.execCommand('copy');
        showToast('Testo copiato!', 'success');
    }
}

// Pulisci input
function clearInput() {
    inputText.value = '';
    outputText.value = '';
    updateCharCount();
    statusIndicator.className = 'status-indicator';
    currentDetectedLang = null;
    detectedLang.textContent = 'Rilevamento automatico...';
    detectedLang.className = '';
    inputText.focus();
}

// Mostra toast
function showToast(message, type = 'info') {
    toast.textContent = message;
    toast.className = `toast show ${type}`;
    
    setTimeout(() => {
        toast.classList.remove('show');
    }, 3000);
}

// Gestione modale
function openSettingsModal() {
    settingsModal.classList.add('show');
    loadAvailableModels();
}

function closeSettingsModal() {
    settingsModal.classList.remove('show');
}

// Event Listeners
translateBtn.addEventListener('click', translateText);
inputText.addEventListener('input', () => {
    updateCharCount();
    detectLanguage(inputText.value);
});
clearBtn.addEventListener('click', clearInput);
copyBtn.addEventListener('click', copyToClipboard);
settingsBtn.addEventListener('click', openSettingsModal);
closeModal.addEventListener('click', closeSettingsModal);
refreshModels.addEventListener('click', loadAvailableModels);
saveSettings.addEventListener('click', saveSettingsData);

// Chiudi modale con ESC
settingsModal.addEventListener('click', (e) => {
    if (e.target === settingsModal) {
        closeSettingsModal();
    }
});

document.addEventListener('keydown', (e) => {
    if (e.key === 'Escape') {
        closeSettingsModal();
    }
    if ((e.ctrlKey || e.metaKey) && e.key === 'Enter') {
        translateText();
    }
});

// Ascolta richiesta apertura impostazioni dal menu
window.electronAPI.onOpenSettings((event) => {
    openSettingsModal();
});

// Inizializzazione
document.addEventListener('DOMContentLoaded', () => {
    loadSettings();
    updateCharCount();
});