/**
 * NIS2 Agile - Competenze (A4 Fase 4.2)
 * 4 tab: Catalogo competenze · Requisiti per ruolo · Competenze persone · Gap & azioni.
 * Client api.comp*: ritorna `data`, lancia su success=false (api.js _acn).
 * Alert->azione: openAction crea NCR+CAPA (workflow esistente). Ancoraggio PR.AT-01/02, GV.RR-04.
 */
'use strict';

let CMP = { skills: [], roles: [], members: [], courses: [], tab: 'catalog' };

function el(id) { return document.getElementById(id); }
function esc(s) { const d = document.createElement('div'); d.textContent = (s == null ? '' : String(s)); return d.innerHTML; }

const LEVEL_LABELS = { 1: 'Base', 2: 'Elementare', 3: 'Intermedio', 4: 'Avanzato', 5: 'Esperto' };
function levelLabel(n) { return LEVEL_LABELS[n] || ('Liv. ' + n); }
function levelOptions(sel) {
    let h = '';
    for (let i = 1; i <= 5; i++) h += '<option value="' + i + '"' + (Number(sel) === i ? ' selected' : '') + '>' + i + ' · ' + LEVEL_LABELS[i] + '</option>';
    return h;
}

document.addEventListener('DOMContentLoaded', async function () {
    if (typeof checkAuth === 'function' && !checkAuth()) return;
    if (window.I18n && I18n.init) I18n.init('it');
    if (typeof loadSidebar === 'function') loadSidebar();
    if (window.HelpSystem && HelpSystem.init) HelpSystem.init();

    document.addEventListener('keydown', function (e) {
        if (e.key === 'Escape') { cmpClose('cmp-skill-modal'); cmpClose('cmp-courses-modal'); }
    });
    ['cmp-skill-modal', 'cmp-courses-modal'].forEach(function (id) {
        const ov = el(id);
        if (ov) ov.addEventListener('click', function (e) { if (e.target === ov) cmpClose(id); });
    });

    await cmpLoadShared();
    cmpRenderCatalog();
});

async function cmpLoadShared() {
    try {
        const [cat, rolesData, members, coursesRaw] = await Promise.all([
            api.compCatalog(),
            api.orgRolesList(),
            api.orgRolesAssignableUsers(),
            api.listCourses()
        ]);
        CMP.skills = cat.skills || [];
        CMP.roles = (rolesData && rolesData.roles) || [];
        CMP.members = Array.isArray(members) ? members : [];
        CMP.courses = (coursesRaw && coursesRaw.success && Array.isArray(coursesRaw.data)) ? coursesRaw.data : [];
        cmpFillRoleSelect();
        cmpFillUserSelect();
    } catch (e) {
        showNotification('Errore nel caricamento: ' + (e.message || e), 'error');
    }
}

function cmpTab(name) {
    CMP.tab = name;
    document.querySelectorAll('.cmp-tab').forEach(t => t.classList.toggle('active', t.dataset.tab === name));
    document.querySelectorAll('.cmp-panel').forEach(p => p.classList.remove('active'));
    const panel = el('panel-' + name);
    if (panel) panel.classList.add('active');
    if (name === 'gap') cmpLoadGap();
}

/* ════════════════ TAB 1 — Catalogo ════════════════ */
function cmpRenderCatalog() {
    el('cmp-catalog-count').textContent = CMP.skills.length + ' competenze (incluse quelle globali)';
    if (!CMP.skills.length) {
        el('cmp-catalog').innerHTML = '<div class="cmp-empty">Nessuna competenza nel catalogo. Creane una con "+ Nuova competenza".</div>';
        return;
    }
    let rows = CMP.skills.map(function (s) {
        const courses = (s.courses || []);
        const actions = s.editable
            ? '<button class="btn btn-outline" onclick="cmpOpenSkill(' + s.id + ')">Modifica</button>'
              + '<button class="btn btn-outline" onclick="cmpOpenCourses(' + s.id + ')">Corsi</button>'
              + '<button class="btn btn-outline" onclick="cmpDeleteSkill(' + s.id + ')">Elimina</button>'
            : '<span class="gap-role-sub">sola lettura</span>';
        return '<tr>'
            + '<td><strong>' + esc(s.name) + '</strong>' + (s.is_global ? ' <span class="cmp-badge global">globale</span>' : '')
              + (s.description ? '<div class="gap-role-sub">' + esc(s.description) + '</div>' : '') + '</td>'
            + '<td>' + (s.area ? '<span class="cmp-badge area">' + esc(s.area) + '</span>' : '—') + '</td>'
            + '<td>' + (courses.length ? courses.map(c => esc(c.title)).join(', ') : '—') + '</td>'
            + '<td><div class="cmp-actions-cell">' + actions + '</div></td>'
            + '</tr>';
    }).join('');
    el('cmp-catalog').innerHTML = '<table class="cmp-table"><thead><tr><th>Competenza</th><th>Area</th><th>Corsi che la erogano</th><th>Azioni</th></tr></thead><tbody>' + rows + '</tbody></table>';
}

function cmpOpenSkill(id) {
    const s = id ? CMP.skills.find(x => x.id === id) : null;
    el('cmp-skill-title').textContent = s ? 'Modifica competenza' : 'Nuova competenza';
    el('cmp-skill-id').value = s ? s.id : '';
    el('cmp-skill-name').value = s ? s.name : '';
    el('cmp-skill-area').value = s ? (s.area || '') : '';
    el('cmp-skill-desc').value = s ? (s.description || '') : '';
    el('cmp-skill-err').textContent = '';
    el('cmp-skill-modal').classList.add('open');
    setTimeout(() => el('cmp-skill-name').focus(), 50);
}

async function cmpSaveSkill() {
    const id = el('cmp-skill-id').value;
    const name = el('cmp-skill-name').value.trim();
    if (!name) { el('cmp-skill-err').textContent = 'Il nome è obbligatorio.'; return; }
    const payload = { name: name, area: el('cmp-skill-area').value.trim(), description: el('cmp-skill-desc').value.trim() };
    const btn = el('cmp-skill-save'); btn.disabled = true;
    try {
        if (id) { await api.compUpdateSkill(parseInt(id, 10), payload); showNotification('Competenza aggiornata.', 'success'); }
        else { await api.compCreateSkill(payload); showNotification('Competenza creata.', 'success'); }
        cmpClose('cmp-skill-modal');
        await cmpReloadCatalog();
    } catch (e) {
        el('cmp-skill-err').textContent = e.message || 'Errore nel salvataggio.';
    } finally { btn.disabled = false; }
}

async function cmpDeleteSkill(id) {
    const s = CMP.skills.find(x => x.id === id);
    if (!confirm('Eliminare la competenza "' + (s ? s.name : '') + '"? Verranno rimossi anche i requisiti e le competenze possedute collegate.')) return;
    try {
        await api.compDeleteSkill(id);
        showNotification('Competenza eliminata.', 'success');
        await cmpReloadCatalog();
    } catch (e) { showNotification(e.message || 'Errore.', 'error'); }
}

async function cmpReloadCatalog() {
    const cat = await api.compCatalog();
    CMP.skills = cat.skills || [];
    cmpRenderCatalog();
}

/* Mappatura corsi */
function cmpOpenCourses(skillId) {
    el('cmp-courses-skill-id').value = skillId;
    el('cmp-courses-err').textContent = '';
    const s = CMP.skills.find(x => x.id === skillId);
    el('cmp-courses-title').textContent = 'Corsi per: ' + (s ? s.name : '');
    cmpRenderCoursesModal();
    el('cmp-courses-modal').classList.add('open');
}

function cmpRenderCoursesModal() {
    const skillId = parseInt(el('cmp-courses-skill-id').value, 10);
    const s = CMP.skills.find(x => x.id === skillId);
    const mapped = s ? (s.courses || []) : [];
    const mappedIds = mapped.map(c => c.course_id);
    // select: corsi non ancora mappati
    const avail = CMP.courses.filter(c => mappedIds.indexOf(c.id) === -1);
    el('cmp-courses-sel').innerHTML = avail.length
        ? avail.map(c => '<option value="' + c.id + '">' + esc(c.title) + '</option>').join('')
        : '<option value="">— Nessun corso disponibile —</option>';
    el('cmp-courses-list').innerHTML = mapped.length
        ? mapped.map(c => '<div class="cm-maprow"><span>' + esc(c.title) + '</span><button class="btn btn-outline btn-sm" onclick="cmpUnmapCourse(' + c.map_id + ')">Rimuovi</button></div>').join('')
        : '<div class="gap-role-sub" style="padding-top:8px;">Nessun corso mappato.</div>';
}

async function cmpMapCourse() {
    const skillId = parseInt(el('cmp-courses-skill-id').value, 10);
    const courseId = parseInt(el('cmp-courses-sel').value, 10);
    if (!courseId) { el('cmp-courses-err').textContent = 'Seleziona un corso.'; return; }
    try {
        await api.compMapCourse({ skill_id: skillId, training_course_id: courseId });
        await cmpReloadCatalog();
        cmpRenderCoursesModal();
        showNotification('Corso mappato.', 'success');
    } catch (e) { el('cmp-courses-err').textContent = e.message || 'Errore.'; }
}

async function cmpUnmapCourse(mapId) {
    try {
        await api.compUnmapCourse(mapId);
        await cmpReloadCatalog();
        cmpRenderCoursesModal();
        showNotification('Mappatura rimossa.', 'success');
    } catch (e) { el('cmp-courses-err').textContent = e.message || 'Errore.'; }
}

/* ════════════════ TAB 2 — Requisiti per ruolo ════════════════ */
function cmpFillRoleSelect() {
    const sel = el('cmp-role-sel');
    if (!CMP.roles.length) {
        sel.innerHTML = '<option value="">— Nessun ruolo: creane nell\'Organigramma —</option>';
        return;
    }
    sel.innerHTML = '<option value="">— Seleziona un ruolo —</option>' +
        CMP.roles.map(r => '<option value="' + r.id + '">' + esc(r.role_name) + (r.holder_name ? ' (' + esc(r.holder_name) + ')' : '') + '</option>').join('');
}

async function cmpLoadRoleSkills() {
    const roleId = parseInt(el('cmp-role-sel').value, 10);
    const wrap = el('cmp-role-skills');
    if (!roleId) { el('cmp-role-add').style.display = 'none'; wrap.innerHTML = ''; return; }
    el('cmp-role-add').style.display = 'flex';
    try {
        const rs = await api.compRoleSkills(roleId);
        // skill select: escludi quelle gia richieste
        const usedIds = rs.map(x => x.skill_id);
        el('cmp-rs-skill').innerHTML = CMP.skills.filter(s => usedIds.indexOf(s.id) === -1)
            .map(s => '<option value="' + s.id + '">' + esc(s.name) + (s.area ? ' [' + esc(s.area) + ']' : '') + '</option>').join('') || '<option value="">— Tutte già assegnate —</option>';
        el('cmp-rs-level').innerHTML = levelOptions(3);
        wrap.innerHTML = rs.length ? cmpRoleSkillsTable(rs) : '<div class="cmp-empty">Nessun requisito per questo ruolo. Aggiungine uno.</div>';
    } catch (e) { showNotification(e.message || 'Errore.', 'error'); }
}

function cmpRoleSkillsTable(rs) {
    const rows = rs.map(x => '<tr>'
        + '<td><strong>' + esc(x.skill_name) + '</strong>' + (x.area ? ' <span class="cmp-badge area">' + esc(x.area) + '</span>' : '') + '</td>'
        + '<td><span class="cmp-badge lvl">Liv. ' + x.required_level + ' · ' + levelLabel(x.required_level) + '</span></td>'
        + '<td><button class="btn btn-outline btn-sm" onclick="cmpRemoveRoleSkill(' + x.id + ')">Rimuovi</button></td>'
        + '</tr>').join('');
    return '<table class="cmp-table"><thead><tr><th>Competenza richiesta</th><th>Livello</th><th></th></tr></thead><tbody>' + rows + '</tbody></table>';
}

async function cmpAddRoleSkill() {
    const roleId = parseInt(el('cmp-role-sel').value, 10);
    const skillId = parseInt(el('cmp-rs-skill').value, 10);
    const level = parseInt(el('cmp-rs-level').value, 10);
    if (!roleId || !skillId) { showNotification('Seleziona ruolo e competenza.', 'error'); return; }
    try {
        await api.compSetRoleSkill({ role_id: roleId, skill_id: skillId, required_level: level });
        showNotification('Requisito aggiunto.', 'success');
        await cmpLoadRoleSkills();
    } catch (e) { showNotification(e.message || 'Errore.', 'error'); }
}

async function cmpRemoveRoleSkill(id) {
    if (!confirm('Rimuovere questo requisito?')) return;
    try { await api.compRemoveRoleSkill(id); showNotification('Requisito rimosso.', 'success'); await cmpLoadRoleSkills(); }
    catch (e) { showNotification(e.message || 'Errore.', 'error'); }
}

/* ════════════════ TAB 3 — Competenze persone ════════════════ */
function cmpFillUserSelect() {
    const sel = el('cmp-user-sel');
    sel.innerHTML = '<option value="">— Seleziona una persona —</option>' +
        CMP.members.map(m => '<option value="' + m.id + '">' + esc(m.full_name || m.email) + '</option>').join('');
}

async function cmpLoadUserSkills() {
    const userId = parseInt(el('cmp-user-sel').value, 10);
    const wrap = el('cmp-user-skills');
    if (!userId) { el('cmp-user-add').style.display = 'none'; wrap.innerHTML = ''; return; }
    el('cmp-user-add').style.display = 'flex';
    try {
        const us = await api.compUserSkills(userId);
        const usedIds = us.map(x => x.skill_id);
        el('cmp-us-skill').innerHTML = CMP.skills.filter(s => usedIds.indexOf(s.id) === -1)
            .map(s => '<option value="' + s.id + '">' + esc(s.name) + (s.area ? ' [' + esc(s.area) + ']' : '') + '</option>').join('') || '<option value="">— Tutte già registrate —</option>';
        el('cmp-us-level').innerHTML = levelOptions(3);
        el('cmp-us-course').innerHTML = '<option value="">— Nessuno —</option>' + CMP.courses.map(c => '<option value="' + c.id + '">' + esc(c.title) + '</option>').join('');
        el('cmp-us-evidence').value = '';
        wrap.innerHTML = us.length ? cmpUserSkillsTable(us) : '<div class="cmp-empty">Nessuna competenza registrata per questa persona.</div>';
    } catch (e) { showNotification(e.message || 'Errore.', 'error'); }
}

function cmpUserSkillsTable(us) {
    const rows = us.map(x => '<tr>'
        + '<td><strong>' + esc(x.skill_name) + '</strong>' + (x.area ? ' <span class="cmp-badge area">' + esc(x.area) + '</span>' : '') + '</td>'
        + '<td><span class="cmp-badge lvl">Liv. ' + x.level + ' · ' + levelLabel(x.level) + '</span></td>'
        + '<td>' + (x.course_title ? esc(x.course_title) : (x.evidence ? esc(x.evidence) : '—')) + '</td>'
        + '<td><button class="btn btn-outline btn-sm" onclick="cmpRemoveUserSkill(' + x.id + ')">Rimuovi</button></td>'
        + '</tr>').join('');
    return '<table class="cmp-table"><thead><tr><th>Competenza</th><th>Livello</th><th>Evidenza / Corso</th><th></th></tr></thead><tbody>' + rows + '</tbody></table>';
}

async function cmpAddUserSkill() {
    const userId = parseInt(el('cmp-user-sel').value, 10);
    const skillId = parseInt(el('cmp-us-skill').value, 10);
    const level = parseInt(el('cmp-us-level').value, 10);
    const courseId = el('cmp-us-course').value || null;
    const evidence = el('cmp-us-evidence').value.trim();
    if (!userId || !skillId) { showNotification('Seleziona persona e competenza.', 'error'); return; }
    try {
        await api.compSetUserSkill({ user_id: userId, skill_id: skillId, level: level, acquired_via_course_id: courseId, evidence: evidence });
        showNotification('Competenza registrata.', 'success');
        await cmpLoadUserSkills();
    } catch (e) { showNotification(e.message || 'Errore.', 'error'); }
}

async function cmpRemoveUserSkill(id) {
    if (!confirm('Rimuovere questa competenza?')) return;
    try { await api.compRemoveUserSkill(id); showNotification('Competenza rimossa.', 'success'); await cmpLoadUserSkills(); }
    catch (e) { showNotification(e.message || 'Errore.', 'error'); }
}

/* ════════════════ TAB 4 — Gap & azioni ════════════════ */
async function cmpLoadGap() {
    const wrap = el('cmp-gap');
    wrap.innerHTML = '<div class="cmp-empty">Calcolo in corso…</div>';
    try {
        const g = await api.compGapGrid();
        const note = g.pr_at_02_applies
            ? 'Soggetto essenziale: si applica anche PR.AT-02 (formazione mirata).'
            : 'Soggetto ' + (g.entity_type === 'important' ? 'importante' : 'non in ambito') + ': si applica PR.AT-01.';
        el('cmp-gap-summary').textContent = g.roles_with_holder + ' ruoli con titolare · ' + g.roles_with_gaps + ' con gap · ' + g.total_gaps + ' gap totali · ' + note;
        if (!g.roles || !g.roles.length) {
            wrap.innerHTML = '<div class="cmp-empty">Nessun ruolo con titolare e requisiti di competenza. Assegna titolari nell\'Organigramma e requisiti nella scheda "Requisiti per ruolo".</div>';
            return;
        }
        wrap.innerHTML = g.roles.map(cmpGapRoleCard).join('');
    } catch (e) {
        wrap.innerHTML = '<div class="cmp-empty">Errore: ' + esc(e.message || e) + '</div>';
    }
}

function cmpGapRoleCard(role) {
    const rows = (role.skills || []).map(function (sk) {
        const pill = sk.gap > 0
            ? '<span class="gap-pill bad">gap ' + sk.gap + '</span>'
            : '<span class="gap-pill ok">ok</span>';
        let ctas = '';
        if (sk.gap > 0) {
            if (sk.open_action) {
                ctas = '<span class="cmp-badge area" title="Non conformità aperta">NC ' + esc(sk.open_action.ncr_code) + '</span>';
            } else {
                ctas = '<button class="btn btn-primary" onclick="cmpOpenAction(' + sk.role_skill_id + ')">Apri non conformità</button>';
                (sk.suggested_courses || []).slice(0, 3).forEach(function (c) {
                    ctas += '<button class="btn btn-outline" onclick="cmpAssignCourse(' + c.id + ',' + role.holder_user_id + ')">Assegna: ' + esc(c.title) + '</button>';
                });
            }
        }
        return '<div class="gap-row">'
            + '<div class="skill">' + esc(sk.skill_name) + (sk.area ? ' <span class="cmp-badge area">' + esc(sk.area) + '</span>' : '') + '</div>'
            + '<div class="gap-meter">richiesto <strong>' + sk.required_level + '</strong> · posseduto <strong>' + sk.current_level + '</strong></div>'
            + '<div>' + pill + '</div>'
            + '<div class="ctas">' + ctas + '</div>'
            + '</div>';
    }).join('');
    return '<div class="gap-role">'
        + '<div class="gap-role-head"><div><span class="gap-role-title">' + esc(role.role_name) + '</span> '
        + '<span class="gap-role-sub">— ' + esc(role.holder_name) + '</span></div>'
        + '<div>' + (role.gap_count > 0 ? '<span class="gap-pill bad">' + role.gap_count + ' gap</span>' : '<span class="gap-pill ok">nessun gap</span>') + '</div></div>'
        + rows + '</div>';
}

async function cmpOpenAction(roleSkillId) {
    if (!confirm('Aprire una non conformità (NCR) e un\'azione correttiva per questo gap?')) return;
    try {
        const r = await api.compOpenAction(roleSkillId);
        showNotification('Creata non conformità ' + r.ncr_code + ' con azione ' + r.capa_code + '.', 'success');
        await cmpLoadGap();
    } catch (e) {
        // 409 = azione già aperta
        showNotification(e.message || 'Errore.', e.error_code === 'ACTION_EXISTS' ? 'info' : 'error');
        if (e.error_code === 'ACTION_EXISTS') await cmpLoadGap();
    }
}

async function cmpAssignCourse(courseId, userId) {
    if (!userId) { showNotification('Il ruolo non ha un titolare a cui assegnare il corso.', 'error'); return; }
    const c = CMP.courses.find(x => x.id === courseId);
    const title = c ? c.title : 'corso';
    if (!confirm('Assegnare il corso "' + title + '" al titolare del ruolo?')) return;
    try {
        const r = await api.assignTraining(courseId, [userId]);
        if (r && r.success) showNotification('Corso assegnato.', 'success');
        else showNotification((r && r.message) || 'Errore nell\'assegnazione.', 'error');
    } catch (e) { showNotification(e.message || 'Errore.', 'error'); }
}

/* ════════════════ util ════════════════ */
function cmpClose(id) { const m = el(id); if (m) m.classList.remove('open'); }