/**
 * NIS2 Agile - i18n (Internationalization)
 *
 * Sistema di traduzione leggero IT/EN.
 * - Lingua di default: 'it'
 * - Salva preferenza in localStorage
 * - Applica traduzioni via attributo data-i18n
 * - Funzione t('chiave') per traduzione programmatica
 */

const I18n = (function () {
    'use strict';

    let _lang = 'it';

    // ── Dizionario traduzioni ─────────────────────────────────────────
    const _dict = {
        // ── Navigazione / Sidebar ──────────────────────
        'nav.main': { it: 'Principale', en: 'Main' },
        'nav.dashboard': { it: 'Dashboard', en: 'Dashboard' },
        'nav.gap_analysis': { it: 'Gap Analysis', en: 'Gap Analysis' },
        'nav.management': { it: 'Gestione', en: 'Management' },
        'nav.risks': { it: 'Rischi', en: 'Risks' },
        'nav.incidents': { it: 'Incidenti', en: 'Incidents' },
        'nav.policies': { it: 'Policy', en: 'Policies' },
        'nav.supply_chain': { it: 'Supply Chain', en: 'Supply Chain' },
        'nav.operations': { it: 'Operativo', en: 'Operations' },
        'nav.training': { it: 'Formazione', en: 'Training' },
        'nav.assets': { it: 'Asset', en: 'Assets' },
        'nav.audit': { it: 'Audit & Report', en: 'Audit & Reports' },
        'nav.system': { it: 'Sistema', en: 'System' },
        'nav.settings': { it: 'Impostazioni', en: 'Settings' },
        'nav.help': { it: 'Guida', en: 'Help' },
        'nav.logout': { it: 'Esci', en: 'Logout' },

        // ── Dashboard ──────────────────────────────────
        'dashboard.title': { it: 'Dashboard', en: 'Dashboard' },
        'dashboard.compliance_score': { it: 'Punteggio Compliance', en: 'Compliance Score' },
        'dashboard.open_risks': { it: 'Rischi Aperti', en: 'Open Risks' },
        'dashboard.active_incidents': { it: 'Incidenti Attivi', en: 'Active Incidents' },
        'dashboard.overdue_tasks': { it: 'Scadenze Superate', en: 'Overdue Tasks' },
        'dashboard.recent_activity': { it: 'Attivita\' Recente', en: 'Recent Activity' },
        'dashboard.upcoming_deadlines': { it: 'Prossime Scadenze', en: 'Upcoming Deadlines' },
        'dashboard.risk_heatmap': { it: 'Mappa Rischi', en: 'Risk Heatmap' },
        'dashboard.quick_actions': { it: 'Azioni Rapide', en: 'Quick Actions' },

        // ── Assessment ─────────────────────────────────
        'assessment.title': { it: 'Gap Analysis NIS2', en: 'NIS2 Gap Analysis' },
        'assessment.new': { it: 'Nuovo Assessment', en: 'New Assessment' },
        'assessment.start': { it: 'Inizia Assessment', en: 'Start Assessment' },
        'assessment.complete': { it: 'Completa', en: 'Complete' },
        'assessment.results': { it: 'Risultati Assessment', en: 'Assessment Results' },
        'assessment.ai_analysis': { it: 'Analisi AI', en: 'AI Analysis' },
        'assessment.generate_ncr': { it: 'Genera Non Conformita\' dai Gap', en: 'Generate NCRs from Gaps' },
        'assessment.categories': { it: 'Categorie', en: 'Categories' },
        'assessment.progress': { it: 'Avanzamento', en: 'Progress' },
        'assessment.not_implemented': { it: 'Non Implementato', en: 'Not Implemented' },
        'assessment.partial': { it: 'Parzialmente Implementato', en: 'Partially Implemented' },
        'assessment.implemented': { it: 'Implementato', en: 'Implemented' },
        'assessment.not_applicable': { it: 'Non Applicabile', en: 'Not Applicable' },

        // ── Rischi ─────────────────────────────────────
        'risks.title': { it: 'Gestione Rischi', en: 'Risk Management' },
        'risks.new': { it: 'Nuovo Rischio', en: 'New Risk' },
        'risks.matrix': { it: 'Matrice Rischi', en: 'Risk Matrix' },
        'risks.likelihood': { it: 'Probabilita\'', en: 'Likelihood' },
        'risks.impact': { it: 'Impatto', en: 'Impact' },
        'risks.treatment': { it: 'Trattamento', en: 'Treatment' },
        'risks.mitigate': { it: 'Mitigare', en: 'Mitigate' },
        'risks.accept': { it: 'Accettare', en: 'Accept' },
        'risks.transfer': { it: 'Trasferire', en: 'Transfer' },
        'risks.avoid': { it: 'Evitare', en: 'Avoid' },

        // ── Incidenti ──────────────────────────────────
        'incidents.title': { it: 'Gestione Incidenti', en: 'Incident Management' },
        'incidents.new': { it: 'Nuovo Incidente', en: 'New Incident' },
        'incidents.early_warning': { it: 'Early Warning (24h)', en: 'Early Warning (24h)' },
        'incidents.notification': { it: 'Notifica (72h)', en: 'Notification (72h)' },
        'incidents.final_report': { it: 'Report Finale (30gg)', en: 'Final Report (30d)' },
        'incidents.timeline': { it: 'Cronologia', en: 'Timeline' },
        'incidents.severity': { it: 'Gravita\'', en: 'Severity' },
        'incidents.low': { it: 'Bassa', en: 'Low' },
        'incidents.medium': { it: 'Media', en: 'Medium' },
        'incidents.high': { it: 'Alta', en: 'High' },
        'incidents.critical': { it: 'Critica', en: 'Critical' },

        // ── Policy ─────────────────────────────────────
        'policies.title': { it: 'Gestione Policy', en: 'Policy Management' },
        'policies.new': { it: 'Nuova Policy', en: 'New Policy' },
        'policies.ai_generate': { it: 'Genera con AI', en: 'Generate with AI' },
        'policies.approve': { it: 'Approva', en: 'Approve' },
        'policies.draft': { it: 'Bozza', en: 'Draft' },
        'policies.review': { it: 'In Revisione', en: 'Under Review' },
        'policies.approved': { it: 'Approvata', en: 'Approved' },
        'policies.published': { it: 'Pubblicata', en: 'Published' },

        // ── Supply Chain ───────────────────────────────
        'supply_chain.title': { it: 'Sicurezza Supply Chain', en: 'Supply Chain Security' },
        'supply_chain.new_supplier': { it: 'Nuovo Fornitore', en: 'New Supplier' },
        'supply_chain.risk_overview': { it: 'Panoramica Rischi', en: 'Risk Overview' },
        'supply_chain.assess': { it: 'Valuta Fornitore', en: 'Assess Supplier' },

        // ── Formazione ─────────────────────────────────
        'training.title': { it: 'Formazione e Awareness', en: 'Training & Awareness' },
        'training.courses': { it: 'Corsi', en: 'Courses' },
        'training.my_assignments': { it: 'I Miei Corsi', en: 'My Assignments' },
        'training.assign': { it: 'Assegna Corso', en: 'Assign Course' },
        'training.completed': { it: 'Completato', en: 'Completed' },
        'training.overdue': { it: 'Scaduto', en: 'Overdue' },

        // ── Asset ──────────────────────────────────────
        'assets.title': { it: 'Inventario Asset', en: 'Asset Inventory' },
        'assets.new': { it: 'Nuovo Asset', en: 'New Asset' },
        'assets.dependency_map': { it: 'Mappa Dipendenze', en: 'Dependency Map' },
        'assets.hardware': { it: 'Hardware', en: 'Hardware' },
        'assets.software': { it: 'Software', en: 'Software' },
        'assets.network': { it: 'Rete', en: 'Network' },
        'assets.data': { it: 'Dati', en: 'Data' },

        // ── Audit ──────────────────────────────────────
        'audit.title': { it: 'Audit & Report', en: 'Audit & Reports' },
        'audit.controls': { it: 'Controlli di Compliance', en: 'Compliance Controls' },
        'audit.evidence': { it: 'Evidenze', en: 'Evidence' },
        'audit.logs': { it: 'Log di Audit', en: 'Audit Logs' },
        'audit.export': { it: 'Esporta Report', en: 'Export Report' },

        // ── Impostazioni ───────────────────────────────
        'settings.title': { it: 'Impostazioni', en: 'Settings' },
        'settings.organization': { it: 'Organizzazione', en: 'Organization' },
        'settings.profile': { it: 'Profilo Utente', en: 'User Profile' },
        'settings.members': { it: 'Membri Team', en: 'Team Members' },
        'settings.security': { it: 'Sicurezza', en: 'Security' },

        // ── Classificazione NIS2 ───────────────────────
        'classification.essential': { it: 'Soggetto Essenziale', en: 'Essential Entity' },
        'classification.important': { it: 'Soggetto Importante', en: 'Important Entity' },
        'classification.not_applicable': { it: 'Non Applicabile', en: 'Not Applicable' },
        'classification.voluntary': { it: 'Adesione Volontaria', en: 'Voluntary Compliance' },

        // ── Azioni comuni ──────────────────────────────
        'action.save': { it: 'Salva', en: 'Save' },
        'action.cancel': { it: 'Annulla', en: 'Cancel' },
        'action.delete': { it: 'Elimina', en: 'Delete' },
        'action.edit': { it: 'Modifica', en: 'Edit' },
        'action.create': { it: 'Crea', en: 'Create' },
        'action.close': { it: 'Chiudi', en: 'Close' },
        'action.back': { it: 'Indietro', en: 'Back' },
        'action.next': { it: 'Avanti', en: 'Next' },
        'action.confirm': { it: 'Conferma', en: 'Confirm' },
        'action.search': { it: 'Cerca', en: 'Search' },
        'action.filter': { it: 'Filtra', en: 'Filter' },
        'action.export': { it: 'Esporta', en: 'Export' },
        'action.loading': { it: 'Caricamento...', en: 'Loading...' },

        // ── Stato ──────────────────────────────────────
        'status.draft': { it: 'Bozza', en: 'Draft' },
        'status.in_progress': { it: 'In Corso', en: 'In Progress' },
        'status.completed': { it: 'Completato', en: 'Completed' },
        'status.open': { it: 'Aperto', en: 'Open' },
        'status.closed': { it: 'Chiuso', en: 'Closed' },
        'status.active': { it: 'Attivo', en: 'Active' },
        'status.archived': { it: 'Archiviato', en: 'Archived' },

        // ── Messaggi ───────────────────────────────────
        'msg.save_success': { it: 'Salvato con successo!', en: 'Saved successfully!' },
        'msg.delete_confirm': { it: 'Sei sicuro di voler eliminare?', en: 'Are you sure you want to delete?' },
        'msg.error_generic': { it: 'Si e\' verificato un errore.', en: 'An error occurred.' },
        'msg.error_connection': { it: 'Errore di connessione al server.', en: 'Server connection error.' },
        'msg.no_data': { it: 'Nessun dato disponibile.', en: 'No data available.' },

        // ── Tempo relativo ─────────────────────────────
        'time.now': { it: 'Adesso', en: 'Just now' },
        'time.min_ago': { it: 'min fa', en: 'min ago' },
        'time.hours_ago': { it: 'ore fa', en: 'hours ago' },
        'time.yesterday': { it: 'Ieri', en: 'Yesterday' },
        'time.days_ago': { it: 'giorni fa', en: 'days ago' },
    };

    // ── API Pubblica ──────────────────────────────────────────────────

    /**
     * Inizializza i18n: carica lingua da localStorage o parametro.
     */
    function init(defaultLang) {
        _lang = localStorage.getItem('nis2_lang') || defaultLang || 'it';
        applyTranslations();
    }

    /**
     * Ritorna la lingua corrente.
     */
    function getLang() {
        return _lang;
    }

    /**
     * Cambia lingua e ri-applica traduzioni.
     */
    function setLang(lang) {
        if (lang !== 'it' && lang !== 'en') return;
        _lang = lang;
        localStorage.setItem('nis2_lang', lang);
        applyTranslations();
    }

    /**
     * Traduce una chiave.
     * @param {string} key - Chiave di traduzione (es. 'nav.dashboard')
     * @param {object} [params] - Parametri per interpolazione {name: 'valore'}
     * @returns {string}
     */
    function t(key, params) {
        const entry = _dict[key];
        if (!entry) return key;
        let text = entry[_lang] || entry['it'] || key;
        if (params) {
            Object.keys(params).forEach(k => {
                text = text.replace(new RegExp('\\{' + k + '\\}', 'g'), params[k]);
            });
        }
        return text;
    }

    /**
     * Applica traduzioni a tutti gli elementi con data-i18n.
     * Attributo data-i18n="chiave" → traduce textContent
     * Attributo data-i18n-placeholder="chiave" → traduce placeholder
     * Attributo data-i18n-title="chiave" → traduce title
     */
    function applyTranslations() {
        document.querySelectorAll('[data-i18n]').forEach(el => {
            const key = el.getAttribute('data-i18n');
            el.textContent = t(key);
        });
        document.querySelectorAll('[data-i18n-placeholder]').forEach(el => {
            el.placeholder = t(el.getAttribute('data-i18n-placeholder'));
        });
        document.querySelectorAll('[data-i18n-title]').forEach(el => {
            el.title = t(el.getAttribute('data-i18n-title'));
        });
        document.querySelectorAll('[data-i18n-html]').forEach(el => {
            el.innerHTML = t(el.getAttribute('data-i18n-html'));
        });
    }

    /**
     * Registra nuove traduzioni (merge).
     */
    function addTranslations(entries) {
        Object.assign(_dict, entries);
    }

    return { init, getLang, setLang, t, applyTranslations, addTranslations };
})();

// Shortcut globale
function t(key, params) { return I18n.t(key, params); }