const API_URL = '../api.php';
let allItems = [];
let currentAdminTab = 'critique';
let currentPage = 1;
const itemsPerPage = 12;
let searchQuery = '';
let selectedIds = new Set();

// ── GÉNÉRATEUR D'ÉTOILES (Supporte les demi-étoiles) ──
function getStarsHTML(rating) {
    const r = parseFloat(rating) || 0;
    const full = Math.floor(r);
    const hasHalf = (r - full) >= 0.5;
    const empty = 5 - Math.ceil(r);
    let html = '★'.repeat(full);
    if (hasHalf) html += '<span class="half-star">★</span>';
    html += `<span class="stars-muted">${'☆'.repeat(empty)}</span>`;
    return html;
}

// ── PARSER CSV ──
function parseCSV(text) {
    if (text.charCodeAt(0) === 0xFEFF) text = text.slice(1);
    const rows = [];
    let col = '', row = [], inQuotes = false;
    for (let i = 0; i < text.length; i++) {
        const c = text[i];
        if (inQuotes) {
            if (c === '"') {
                if (text[i+1] === '"') { col += '"'; i++; }
                else inQuotes = false;
            } else col += c;
        } else {
            if (c === '"') inQuotes = true;
            else if (c === ',') { row.push(col); col = ''; }
            else if (c === '\n' || c === '\r') {
                if (c === '\r' && text[i+1] === '\n') i++;
                row.push(col); col = '';
                if (row.length > 1 || row[0] !== '') rows.push(row);
                row = [];
            } else col += c;
        }
    }
    if (col !== '' || row.length > 0) { row.push(col); rows.push(row); }
    if (rows.length === 0) return [];
    const headers = rows[0].map(h => h.trim());
    const data = [];
    for (let i = 1; i < rows.length; i++) {
        if (rows[i].length === headers.length) {
            const obj = {};
            headers.forEach((h, idx) => obj[h] = rows[i][idx]);
            data.push(obj);
        }
    }
    return data;
}

// ── BARRE DE PROGRESSION ──
function showProgressModal(total) {
    document.getElementById('progress-text').textContent = 'Traitement des films et récupération TMDB...';
    document.getElementById('progress-bar').style.width = '0%';
    document.getElementById('progress-count').textContent = `0 / ${total}`;
    document.getElementById('progress-overlay').classList.add('open');
}
function updateProgressModal(current, total) {
    const pct = Math.round((current / total) * 100);
    document.getElementById('progress-bar').style.width = pct + '%';
    document.getElementById('progress-count').textContent = `${current} / ${total}`;
}
function closeProgressModal() {
    document.getElementById('progress-overlay').classList.remove('open');
}

// ── INITIALISATION ──
document.addEventListener('DOMContentLoaded', () => {
    loadDashboardData();
    initEventListeners();
    const confirmBtn = document.getElementById('confirm-btn');
    if (confirmBtn) {
        confirmBtn.addEventListener('click', () => {
            if (pendingDeleteAction) pendingDeleteAction();
            closeConfirmModal();
        });
    }
});

function initEventListeners() {
    const filmForm = document.getElementById('film-form');
    if (filmForm) filmForm.addEventListener('submit', saveFilmForm);
    const csvInput = document.getElementById('csv-file');
    if (csvInput) csvInput.addEventListener('change', (e) => handleCsvUpload(e.target));
    
    const searchInput = document.getElementById('search-input');
    if (searchInput) {
        searchInput.addEventListener('input', (e) => {
            searchQuery = e.target.value;
            currentPage = 1;
            renderAdminTable();
        });
    }

    document.addEventListener('click', (e) => {
        if (e.target.classList.contains('modal-close') || e.target.closest('.modal-close')) {
            const overlay = e.target.closest('.overlay');
            if (overlay) overlay.classList.remove('open');
        }
        if (e.target.classList.contains('overlay')) {
            e.target.classList.remove('open');
        }
    });
}

// ── CHARGEMENT DES DONNÉES ──
async function loadDashboardData() {
    try {
        const res = await fetch(`${API_URL}?action=get_films`, { cache: 'no-store' });
        allItems = await res.json();
        const secRes = await fetch(`${API_URL}?action=check_security_status`, { cache: 'no-store' });
        const secData = await secRes.json();
        const banner = document.getElementById('security-banner');
        if (banner) banner.style.display = secData.is_blank ? 'flex' : 'none';
        renderAdminTable();
    } catch (err) { console.error('Erreur chargement :', err); }
}

// ── RENDU DU TABLEAU ──
function renderAdminTable() {
    const tbody = document.getElementById('admin-table-body');
    if (!tbody) return;
    tbody.innerHTML = '';

    let filtered = allItems.filter(item => item.type === currentAdminTab);
    if (searchQuery) {
        const q = searchQuery.toLowerCase();
        filtered = filtered.filter(f => 
            f.title.toLowerCase().includes(q) || 
            (f.director && f.director.toLowerCase().includes(q))
        );
    }

    const countLabel = document.getElementById('admin-count-label');
    if (countLabel) countLabel.textContent = `${filtered.length} élément(s)`;

    const totalPages = Math.ceil(filtered.length / itemsPerPage) || 1;
    if (currentPage > totalPages) currentPage = totalPages;
    const startIdx = (currentPage - 1) * itemsPerPage;
    const pageItems = filtered.slice(startIdx, startIdx + itemsPerPage);

    pageItems.forEach(f => {
        const tr = document.createElement('tr');
        let infoHtml = '';
        if (currentAdminTab === 'critique') {
            infoHtml = `
                <div class="info-cell">
                    <span class="tbl-stars">${getStarsHTML(f.rating)}</span>
                    <span class="rating-badge">${parseFloat(f.rating).toFixed(1)}</span>
                </div>`;
            if (f.streaming && f.streaming !== 'Disponible en support physique ou Cinéma') {
                infoHtml += `<span class="streaming-badge" title="${f.streaming}">${f.streaming}</span>`;
            } else {
                infoHtml += `<span class="physical-badge">🎟️ Cinéma / Physique</span>`;
            }
        } else {
            infoHtml = `<span class="badge-format">${f.format || '-'}</span>`;
            if (f.length) infoHtml += `<span style="font-size:0.8rem; color:var(--muted); margin-left:0.4rem;">${f.length}</span>`;
        }

        tr.innerHTML = `
            <td style="text-align:center; width:40px;">
                <input type="checkbox" class="film-checkbox" value="${f.id}" onclick="toggleSingleSelect('${f.id}', this)">
            </td>
            <td style="width:60px; text-align:center;">
                ${f.poster ? `<img src="${f.poster}" class="thumb" alt="Affiche">` : '<div class="thumb-ph"><i class="ti ti-photo"></i></div>'}
            </td>
            <td><strong>${f.title}</strong></td>
            <td style="color:var(--text-secondary);">${f.year || '-'}</td>
            <td style="color:var(--text-secondary);">${f.director || '-'}</td>
            <td><div class="info-cell">${infoHtml}</div></td>
            <td class="tbl-actions" style="width:100px; text-align:right;">
                <button onclick="openEditModal('${f.id}')" title="Éditer"><i class="ti ti-edit"></i></button>
                <button class="del" onclick="deleteSingleFilm('${f.id}')" title="Supprimer"><i class="ti ti-trash"></i></button>
            </td>`;
        tbody.appendChild(tr);
    });

    document.querySelectorAll('.film-checkbox').forEach(cb => {
        cb.checked = selectedIds.has(cb.value);
    });

    renderPagination(totalPages, filtered.length);
}

// ── SÉLECTION ─
function toggleSingleSelect(id, checkbox) {
    if (checkbox.checked) {
        selectedIds.add(String(id));
    } else {
        selectedIds.delete(String(id));
    }
    updateBulkBar();
    const selectAll = document.getElementById('select-all-checkbox');
    const filtered = allItems.filter(item => item.type === currentAdminTab);
    if (selectAll) {
        selectAll.checked = filtered.length > 0 && filtered.every(f => selectedIds.has(String(f.id)));
    }
}

function toggleSelectAll(source) {
    const filtered = allItems.filter(item => item.type === currentAdminTab);
    if (source.checked) {
        filtered.forEach(f => selectedIds.add(String(f.id)));
    } else {
        filtered.forEach(f => selectedIds.delete(String(f.id)));
    }
    document.querySelectorAll('.film-checkbox').forEach(cb => {
        cb.checked = selectedIds.has(cb.value);
    });
    updateBulkBar();
}

function updateBulkBar() {
    const bulkBar = document.getElementById('bulk-actions-bar');
    const bulkCount = document.getElementById('bulk-count');
    if (selectedIds.size > 0) {
        if (bulkBar) bulkBar.style.display = 'flex';
        if (bulkCount) bulkCount.textContent = selectedIds.size;
    } else {
        if (bulkBar) bulkBar.style.display = 'none';
        const selectAll = document.getElementById('select-all-checkbox');
        if (selectAll) selectAll.checked = false;
    }
}

// ── PAGINATION ──
function renderPagination(totalPages, totalItems) {
    const container = document.getElementById('pagination-container');
    if (!container) return;
    container.innerHTML = '';
    if (totalItems === 0) {
        container.innerHTML = '<p style="color:var(--muted); text-align:center; width:100%;">Aucun élément trouvé.</p>';
        return;
    }
    const info = document.createElement('span');
    info.className = 'pagination-info';
    info.textContent = `Page ${currentPage} sur ${totalPages}`;
    container.appendChild(info);

    const prevBtn = document.createElement('button');
    prevBtn.innerHTML = '<i class="ti ti-chevron-left"></i>';
    prevBtn.disabled = currentPage === 1;
    prevBtn.onclick = () => { currentPage--; renderAdminTable(); };
    container.appendChild(prevBtn);

    const maxButtons = 5;
    let startPage = Math.max(1, currentPage - Math.floor(maxButtons / 2));
    let endPage = Math.min(totalPages, startPage + maxButtons - 1);
    if (endPage - startPage + 1 < maxButtons) {
        startPage = Math.max(1, endPage - maxButtons + 1);
    }
    if (startPage > 1) {
        container.appendChild(createPageBtn(1));
        if (startPage > 2) container.appendChild(createEllipsis());
    }
    for (let i = startPage; i <= endPage; i++) {
        container.appendChild(createPageBtn(i));
    }
    if (endPage < totalPages) {
        if (endPage < totalPages - 1) container.appendChild(createEllipsis());
        container.appendChild(createPageBtn(totalPages));
    }
    const nextBtn = document.createElement('button');
    nextBtn.innerHTML = '<i class="ti ti-chevron-right"></i>';
    nextBtn.disabled = currentPage === totalPages;
    nextBtn.onclick = () => { currentPage++; renderAdminTable(); };
    container.appendChild(nextBtn);
}

function createPageBtn(num) {
    const btn = document.createElement('button');
    btn.textContent = num;
    if (num === currentPage) btn.classList.add('active');
    btn.onclick = () => { currentPage = num; renderAdminTable(); };
    return btn;
}

function createEllipsis() {
    const span = document.createElement('span');
    span.textContent = '...';
    span.style.color = 'var(--muted)';
    span.style.padding = '0 0.5rem';
    return span;
}

// ── POP-UP CONFIRMATION ─
let pendingDeleteAction = null;
function showConfirmModal(actionFn) {
    pendingDeleteAction = actionFn;
    const modal = document.getElementById('confirm-modal');
    if (modal) modal.classList.add('open');
}
function closeConfirmModal() {
    const modal = document.getElementById('confirm-modal');
    if (modal) modal.classList.remove('open');
    pendingDeleteAction = null;
}

// ─ SUPPRESSIONS ──
async function executeBulkDelete() {
    const ids = Array.from(selectedIds);
    if (ids.length === 0) return;
    showConfirmModal(async () => {
        try {
            const res = await fetch(`${API_URL}?action=bulk_delete`, {
                method: 'POST',
                headers: { 'Authorization': localStorage.getItem('token'), 'Content-Type': 'application/json' },
                body: JSON.stringify({ ids, type: currentAdminTab })
            });
            if (!res.ok) throw new Error("Erreur serveur.");
            selectedIds.clear();
            document.getElementById('bulk-actions-bar').style.display = 'none';
            const selectAll = document.getElementById('select-all-checkbox');
            if (selectAll) selectAll.checked = false;
            loadDashboardData();
        } catch (err) {
            console.error('Erreur bulk delete :', err);
            alert("Une erreur est survenue.");
        }
    });
}

async function deleteSingleFilm(id) {
    showConfirmModal(async () => {
        try {
            const res = await fetch(`${API_URL}?action=delete_film&id=${id}&type=${currentAdminTab}`, {
                method: 'DELETE',
                headers: { 'Authorization': localStorage.getItem('token') }
            });
            if (!res.ok) throw new Error("Erreur serveur.");
            loadDashboardData();
        } catch (err) {
            console.error('Erreur delete :', err);
            alert("Une erreur est survenue.");
        }
    });
}

// ── MODALES & UI ──
function toggleFormFields() {
    const critFields = document.getElementById('form-critique-fields');
    const vidFields = document.getElementById('form-videotheque-fields');
    if (critFields) critFields.style.display = currentAdminTab === 'critique' ? 'block' : 'none';
    if (vidFields) vidFields.style.display = currentAdminTab === 'videotheque' ? 'block' : 'none';
}

function switchAdminTab(tabName) {
    currentAdminTab = tabName;
    currentPage = 1;
    searchQuery = '';
    selectedIds.clear();
    const searchInput = document.getElementById('search-input');
    if (searchInput) searchInput.value = '';
    document.querySelectorAll('.tab-btn').forEach(b => b.classList.remove('active'));
    const btn = document.getElementById(`btn-tab-${tabName}`);
    if (btn) btn.classList.add('active');
    toggleFormFields();
    renderAdminTable();
}

function openAddModal() {
    document.getElementById('film-form').reset();
    document.getElementById('f-id').value = '';
    toggleFormFields();
    document.getElementById('admin-modal').classList.add('open');
}

function openEditModal(id) {
    const item = allItems.find(x => String(x.id) === String(id));
    if (!item) return;
    document.getElementById('f-id').value = item.id;
    document.getElementById('f-title').value = item.title;
    document.getElementById('f-year').value = item.year || '';
    document.getElementById('f-director').value = item.director || '';
    document.getElementById('f-poster').value = item.poster || '';
    toggleFormFields();
    if (currentAdminTab === 'critique') {
        document.getElementById('f-rating').value = item.rating || 3;
        document.getElementById('f-review').value = item.review || '';
        document.getElementById('f-streaming').value = item.streaming || '';
    } else {
        document.getElementById('f-format').value = item.format || '';
        document.getElementById('f-length').value = item.length || '';
        document.getElementById('f-publisher').value = item.publisher || '';
        document.getElementById('f-aspect').value = item.aspect_ratio || '';
        document.getElementById('f-ean').value = item.ean_isbn13 || '';
        document.getElementById('f-discs').value = item.number_of_discs || 1;
        document.getElementById('f-description').value = item.description || '';
    }
    document.getElementById('admin-modal').classList.add('open');
}

function closeAdminModal() { document.getElementById('admin-modal').classList.remove('open'); }
function openConfigModal() { document.getElementById('config-modal').classList.add('open'); }
function closeConfigModal() { document.getElementById('config-modal').classList.remove('open'); }
function openPasswordModal() {
    document.getElementById('pwd-error').style.display = 'none';
    document.getElementById('password-modal').classList.add('open');
}
function closePasswordModal() { document.getElementById('password-modal').classList.remove('open'); }
function logout() {
    localStorage.removeItem('token');
    window.location.href = 'login.html';
}

// ── SAUVEGARDE FILM ──
async function saveFilmForm(e) {
    e.preventDefault();
    const payload = {
        type: currentAdminTab,
        id: document.getElementById('f-id').value,
        title: document.getElementById('f-title').value,
        year: document.getElementById('f-year').value,
        director: document.getElementById('f-director').value,
        poster: document.getElementById('f-poster').value,
        rating: document.getElementById('f-rating') ? document.getElementById('f-rating').value : '',
        review: document.getElementById('f-review') ? document.getElementById('f-review').value : '',
        streaming: document.getElementById('f-streaming') ? document.getElementById('f-streaming').value : '',
        format: document.getElementById('f-format') ? document.getElementById('f-format').value : '',
        length: document.getElementById('f-length') ? document.getElementById('f-length').value : '',
        publisher: document.getElementById('f-publisher') ? document.getElementById('f-publisher').value : '',
        aspect_ratio: document.getElementById('f-aspect') ? document.getElementById('f-aspect').value : '',
        ean_isbn13: document.getElementById('f-ean') ? document.getElementById('f-ean').value : '',
        number_of_discs: document.getElementById('f-discs') ? document.getElementById('f-discs').value : 1,
        description: document.getElementById('f-description') ? document.getElementById('f-description').value : ''
    };
    try {
        await fetch(`${API_URL}?action=save_film`, {
            method: 'POST',
            headers: { 'Authorization': localStorage.getItem('token'), 'Content-Type': 'application/json' },
            body: JSON.stringify(payload)
        });
        closeAdminModal();
        loadDashboardData();
    } catch (err) { console.error('Erreur sauvegarde :', err); }
}

// ── IMPORT CSV PAR LOTS ──
async function handleCsvUpload(input) {
    if (!input.files || input.files.length === 0) return;
    const file = input.files[0];
    input.value = '';

    try {
        const text = await file.text();
        const allData = parseCSV(text);
        if (allData.length === 0) {
            alert('❌ Le fichier CSV est vide ou mal formaté.');
            return;
        }
        closeConfigModal();
        showProgressModal(allData.length);

        const batchSize = 5;
        let processed = 0;
        for (let i = 0; i < allData.length; i += batchSize) {
            const batch = allData.slice(i, i + batchSize);
            try {
                await fetch(`${API_URL}?action=import_batch`, {
                    method: 'POST',
                    headers: { 
                        'Authorization': localStorage.getItem('token'),
                        'Content-Type': 'application/json' 
                    },
                    body: JSON.stringify({ items: batch, type: currentAdminTab })
                });
            } catch (err) {
                console.error('Erreur sur un lot:', err);
            }
            processed += batch.length;
            updateProgressModal(processed, allData.length);
        }
        closeProgressModal();
        alert(`✅ Import terminé ! ${allData.length} élément(s) traité(s).`);
        loadDashboardData();
    } catch (err) {
        console.error('Erreur lecture CSV :', err);
        closeProgressModal();
        alert(' Impossible de lire le fichier CSV.');
    }
}

// ── SAUVEGARDE CLÉ TMDB ──
async function saveTmdbKey() {
    const input = document.getElementById('tmdb-key-input');
    if (input && input.value) {
        try {
            const res = await fetch(`${API_URL}?action=save_config`, {
                method: 'POST',
                headers: { 'Authorization': localStorage.getItem('token'), 'Content-Type': 'application/json' },
                body: JSON.stringify({ key_name: 'tmdb_api_key', key_value: input.value })
            });
            const data = await res.json();
            if (data.success) {
                alert('✅ Clé API sauvegardée et chiffrée en base de données !');
                closeConfigModal();
            } else {
                alert('❌ Erreur : ' + (data.error || 'Impossible de sauvegarder.'));
            }
        } catch (err) {
            console.error('Erreur sauvegarde clé :', err);
            alert('Erreur de communication avec le serveur.');
        }
    }
}

// ── SAUVEGARDE MOT DE PASSE ──
async function saveNewPassword() {
    const pwdInput = document.getElementById('new-password-input');
    const pwdConfirm = document.getElementById('new-password-confirm');
    const errorMsg = document.getElementById('pwd-error');
    if (!pwdInput || !pwdConfirm) return;
    if (pwdInput.value !== pwdConfirm.value) {
        errorMsg.textContent = "Les mots de passe ne correspondent pas.";
        errorMsg.style.display = "block";
        return;
    }
    if (pwdInput.value.length < 4) {
        errorMsg.textContent = "Le mot de passe doit contenir au moins 4 caractères.";
        errorMsg.style.display = "block";
        return;
    }
    try {
        const response = await fetch(`${API_URL}?action=update_password`, {
            method: 'POST',
            headers: { 'Authorization': localStorage.getItem('token'), 'Content-Type': 'application/json' },
            body: JSON.stringify({ new_password: pwdInput.value })
        });
        const data = await response.json();
        if (data.success) {
            pwdInput.value = '';
            pwdConfirm.value = '';
            errorMsg.style.display = "none";
            closePasswordModal();
            alert('Mot de passe mis à jour.');
            loadDashboardData();
        }
    } catch (err) { console.error('Erreur mise à jour mot de passe :', err); }
}