// ================================================================
// DENTAL IMAGE MANAGER - Main JavaScript
// Two-Level Navigation: Patients → Images → Transform
// ================================================================

const API_URL = '/api';

// ================================================================
// ERROR LOGGER — Logs to console AND shows on screen
// ================================================================
const _log = {
    info:  (tag, ...args) => console.log(`%c[${tag}]`, 'color:#667eea;font-weight:bold', ...args),
    warn:  (tag, ...args) => console.warn(`%c[${tag}]`, 'color:#ffa500;font-weight:bold', ...args),
    error: (tag, ...args) => console.error(`%c[${tag}]`, 'color:#ff4444;font-weight:bold', ...args),
    group: (tag)          => console.group(`%c[${tag}]`, 'color:#667eea;font-weight:bold'),
    end:   ()             => console.groupEnd()
};

function showErrorBanner(msg, detail = '') {
    let banner = document.getElementById('_errBanner');
    if (!banner) {
        banner = document.createElement('div');
        banner.id = '_errBanner';
        banner.style.cssText = [
            'position:fixed','bottom:70px','left:50%','transform:translateX(-50%)',
            'background:#c0392b','color:#fff','padding:12px 20px','border-radius:8px',
            'z-index:9999','font-size:13px','max-width:90vw','text-align:center',
            'box-shadow:0 4px 20px rgba(0,0,0,0.3)','cursor:pointer'
        ].join(';');
        banner.onclick = () => banner.remove();
        document.body.appendChild(banner);
    }
    banner.innerHTML = `<b>⚠️ ${msg}</b>${detail ? `<br><small>${detail}</small>` : ''}`;
    setTimeout(() => banner && banner.remove(), 8000);
}

function getAuthToken() {
    return localStorage.getItem('auth_token');
}

let authVerificationInProgress = false;
let currentUser = null;

async function verifyAuth() {
    if (authVerificationInProgress) return false;
    const token = getAuthToken();
    if (!token) { window.location.href = '/login'; return false; }
    authVerificationInProgress = true;
    try {
        const response = await fetch(`${API_URL}/auth/verify`, {
            headers: { 'Authorization': `Bearer ${token}` }
        });
        if (!response.ok) { localStorage.removeItem('auth_token'); window.location.href = '/login'; return false; }
        const data = await response.json();
        authVerificationInProgress = false;
        if (data.valid) {
            currentUser = data.user;
            if (currentUser && currentUser.is_admin) {
                const navAdmin = document.getElementById('navAdminClinics');
                if (navAdmin) navAdmin.style.display = 'flex';
            }
            return true;
        }
        localStorage.removeItem('auth_token'); window.location.href = '/login'; return false;
    } catch {
        localStorage.removeItem('auth_token');
        authVerificationInProgress = false;
        window.location.href = '/login'; return false;
    }
}

async function fetchWithAuth(url, options = {}) {
    const token = getAuthToken();
    _log.info('FETCH', `${options.method || 'GET'} ${url}`);
    const t0 = Date.now();
    try {
        const res = await fetch(url, {
            ...options,
            headers: { ...options.headers, 'Authorization': `Bearer ${token}` }
        });
        const ms = Date.now() - t0;
        if (!res.ok) {
            _log.warn('FETCH', `${options.method || 'GET'} ${url} → ${res.status} (${ms}ms)`);
        } else {
            _log.info('FETCH', `${options.method || 'GET'} ${url} → ${res.status} OK (${ms}ms)`);
        }
        return res;
    } catch (err) {
        const ms = Date.now() - t0;
        _log.error('FETCH', `${options.method || 'GET'} ${url} → FALHOU após ${ms}ms`, err.message);
        throw err;
    }
}

// ================================================================
// STATE
// ================================================================

let socket = null;
let view = 'patients'; // 'patients' | 'patient-images'
let patients = [];
let patientImages = [];
let selectedPatient = null;   // { patient_name, first_name, last_name, ... }
let selectedImageId = null;
let clientsList = [];
let selectedClient = '';
let showDisabled = false;
let currentTransformations = [];

// ================================================================
// DOM REFS
// ================================================================

const searchInput        = document.getElementById('searchInput');
const clientFilter       = document.getElementById('clientFilter');
const toggleDisabledBtn  = document.getElementById('toggleDisabledBtn');
const toggleText         = document.getElementById('toggleText');
const imagesGrid         = document.getElementById('imagesGrid');
const loadingState       = document.getElementById('loadingState');
const emptyState         = document.getElementById('emptyState');
const transformModal     = document.getElementById('transformModal');
const backBtn            = document.getElementById('backBtn');
const patientHeader      = document.getElementById('patientHeader');
const patientTitle       = document.getElementById('patientTitle');
const patientMeta        = document.getElementById('patientMeta');

// ================================================================
// INIT
// ================================================================

document.addEventListener('DOMContentLoaded', async () => {
    _log.info('INIT', 'DOMContentLoaded — iniciando aplicação');
    try {
        const ok = await verifyAuth();
        if (!ok) { _log.warn('AUTH', 'Verificação de auth falhou, redirecionando...'); return; }
        _log.info('AUTH', 'Autenticação OK');

        const token = getAuthToken();
        if (token) {
            _log.info('SOCKET', 'Conectando Socket.IO...');
            socket = io({ auth: { token } });
            const debouncedReload = debounce(() => {
                if (view === 'patients') loadPatients();
                else loadPatientImages(selectedPatient.patient_name);
            }, 1200);
            socket.on('new-image', () => {
                _log.info('SOCKET', 'Nova imagem recebida via socket');
                showToast('Nova imagem recebida!', 'info');
                debouncedReload();
            });
            socket.on('clients-list-updated', () => loadClientsList());
            socket.on('connect', () => _log.info('SOCKET', '✅ Socket.IO conectado, ID:', socket.id));
            socket.on('disconnect', (r) => _log.warn('SOCKET', '❌ Socket.IO desconectado. Motivo:', r));
            socket.on('connect_error', (e) => _log.error('SOCKET', 'Erro de conexão:', e.message));
        }

        await loadClientsList();
        loadPatients();
        setupEventListeners();
        setInterval(loadClientsList, 5000);
    } catch (error) {
        _log.error('INIT', 'Erro fatal na inicialização:', error.message, error);
        showErrorBanner('Erro na inicialização', error.message);
        localStorage.removeItem('auth_token');
        window.location.replace('/login');
    }
});

// ================================================================
// EVENT LISTENERS
// ================================================================

function setupEventListeners() {
    searchInput.addEventListener('input', debounce(() => {
        if (view === 'patients') loadPatients();
        else loadPatientImages(selectedPatient.patient_name);
    }, 400));

    clientFilter.addEventListener('change', e => {
        selectedClient = e.target.value;
        if (view === 'patients') loadPatients();
    });

    toggleDisabledBtn.addEventListener('click', () => {
        showDisabled = !showDisabled;
        toggleText.textContent = showDisabled ? 'Ver Ativas' : 'Ver Ocultas';
        if (view === 'patients') loadPatients();
        else loadPatientImages(selectedPatient.patient_name);
    });

    backBtn.addEventListener('click', () => showPatientsView());

    // Transform modal close on backdrop
    transformModal.addEventListener('click', e => {
        if (e.target === transformModal) transformModal.classList.remove('active');
    });
    document.getElementById('closeTransformModal').addEventListener('click', () => {
        transformModal.classList.remove('active');
    });
}

// ================================================================
// CLIENTS LIST
// ================================================================

async function loadClientsList() {
    try {
        const r = await fetch('/api/socket/status');
        const data = await r.json();
        clientsList = (data.identified || []).map(c => ({
            ...c, name: c.name || 'Unknown', displayName: c.name || 'Unknown',
            dbName: c.name || 'Unknown', status: 'identified'
        }));

        const imagesRes = await fetchWithAuth('/api/images/patients?disabled=false&search=');
        if (imagesRes.ok) {
            const pts = await imagesRes.json();
            const uniqueClients = [...new Set(pts.map(p => p.client_name).filter(Boolean))];
            uniqueClients.forEach(cn => {
                if (!clientsList.find(c => c.dbName === cn || c.name === cn)) {
                    clientsList.push({ name: cn, displayName: cn, dbName: cn, type: 'historic', socketId: null, status: 'historic' });
                }
            });
        }
        updateClientsDropdown();
    } catch (e) { console.error('Erro ao carregar clientes:', e); }
}

function updateClientsDropdown() {
    const current = clientFilter.value;
    clientFilter.innerHTML = '<option value="">📋 Todos os Clientes</option>';
    const sorted = [...clientsList].sort((a, b) => {
        const o = { identified: 1, connected: 2, historic: 3 };
        return (o[a.status] || 99) - (o[b.status] || 99);
    });
    sorted.forEach(c => {
        const opt = document.createElement('option');
        opt.value = c.name;
        let lbl = c.name;
        if (c.status === 'identified') lbl += ' ✅';
        else if (c.status === 'historic') lbl += ' 📚';
        opt.textContent = lbl;
        clientFilter.appendChild(opt);
    });
    clientFilter.value = current || selectedClient;
}

// ================================================================
// VIEW: PATIENTS LIST
// ================================================================

function showPatientsView() {
    view = 'patients';
    selectedPatient = null;
    backBtn.style.display = 'none';
    patientHeader.style.display = 'none';
    loadPatients();
}

async function loadPatients(silent = false) {
    _log.group('LOAD_PATIENTS');
    _log.info('LOAD_PATIENTS', `Iniciando carga. silent=${silent}, showDisabled=${showDisabled}, client="${selectedClient}"`);

    if (!silent) {
        loadingState.style.display = 'block';
        imagesGrid.style.display = 'none';
        emptyState.style.display = 'none';
    }

    try {
        const search = searchInput.value.trim();
        const clientParam = selectedClient ? `&client=${encodeURIComponent(selectedClient)}` : '';
        const url = `/api/images/patients?disabled=${showDisabled}&search=${encodeURIComponent(search)}${clientParam}`;

        const res = await fetchWithAuth(url);

        if (!res.ok) {
            let errBody = '';
            try { errBody = await res.text(); } catch (_) {}
            _log.error('LOAD_PATIENTS', `HTTP ${res.status} — body:`, errBody);
            if (res.status === 401 || res.status === 403) {
                _log.warn('AUTH', 'Token inválido/expirado, redirecionando para login');
                localStorage.removeItem('auth_token');
                window.location.href = '/login';
                return;
            }
            throw new Error(`HTTP ${res.status}: ${errBody || 'Erro ao carregar pacientes'}`);
        }

        patients = await res.json();
        _log.info('LOAD_PATIENTS', `✅ ${patients.length} paciente(s) recebido(s)`);
        if (patients.length > 0) {
            _log.info('LOAD_PATIENTS', 'Primeiro paciente:', {
                name: patients[0].patient_name,
                thumb: patients[0].thumb_filename,
                count: patients[0].image_count
            });
        }

        loadingState.style.display = 'none';

        if (patients.length === 0) {
            _log.warn('LOAD_PATIENTS', 'Nenhum paciente encontrado — exibindo empty state');
            emptyState.style.display = 'block';
            imagesGrid.style.display = 'none';
        } else {
            emptyState.style.display = 'none';
            imagesGrid.style.display = 'grid';
            _log.info('LOAD_PATIENTS', `imagesGrid display=${imagesGrid.style.display}`);
            renderPatientCards();
        }
    } catch (e) {
        _log.error('LOAD_PATIENTS', '❌ Exceção:', e.message, e);
        loadingState.style.display = 'none';
        emptyState.style.display = 'block';
        showErrorBanner('Erro ao carregar pacientes', e.message);
        showToast('Erro ao carregar pacientes', 'error');
    } finally {
        _log.end();
    }
}

function renderPatientCards() {
    _log.group('RENDER_CARDS');
    _log.info('RENDER_CARDS', `Renderizando ${patients.length} card(s)...`);

    // Inspecionar o grid antes de renderizar
    const gridStyle = window.getComputedStyle(imagesGrid);
    _log.info('RENDER_CARDS', 'imagesGrid computed style:', {
        display: gridStyle.display,
        gridTemplateColumns: gridStyle.gridTemplateColumns,
        width: gridStyle.width,
        height: gridStyle.height,
        overflow: gridStyle.overflow
    });

    imagesGrid.innerHTML = patients.map((p, index) => {
        const fullName = p.patient_name || 'Sem nome';
        const thumb    = p.thumb_filename ? `/uploads/${p.thumb_filename}` : '';
        const count    = p.image_count || 0;
        const date     = formatDate(p.last_date);
        const doctor   = p.doctor  || '—';
        const remark   = p.remark  || '—';

        if (index === 0) {
            _log.info('RENDER_CARDS', 'Card #0 dados:', { fullName, thumb, count, date, doctor });
        }

        return `
        <div class="image-card patient-card" onclick="openPatientByIndex(${index})">
            <div class="image-preview" style="${thumb ? `background-image: url('${thumb}'); background-size: cover; background-position: center;` : 'background: linear-gradient(135deg,#667eea22,#764ba222);'}">
                <div class="patient-count-badge">${count} imagem${count !== 1 ? 'ns' : ''}</div>
            </div>
            <div class="image-info">
                <div class="image-patient-name" title="${escapeHtml(fullName)}">${escapeHtml(fullName)}</div>
                <div class="image-meta"><span>📅 ${date}</span></div>
                <div class="image-doctor-remark">
                    <div title="${escapeHtml(doctor)}">🩺 <b>Dentista:</b> ${escapeHtml(doctor)}</div>
                    <div title="${escapeHtml(remark)}">📝 <b>Obs:</b> ${escapeHtml(remark)}</div>
                </div>
            </div>
        </div>`;
    }).join('');

    // Inspecionar o primeiro card renderizado
    requestAnimationFrame(() => {
        const firstCard = imagesGrid.querySelector('.image-card');
        if (firstCard) {
            const cs = window.getComputedStyle(firstCard);
            const preview = firstCard.querySelector('.image-preview');
            const pcs = preview ? window.getComputedStyle(preview) : null;
            _log.info('RENDER_CARDS', 'Primeiro card computado:', {
                cardW: cs.width, cardH: cs.height,
                previewH: pcs ? pcs.height : 'n/a',
                previewBg: pcs ? pcs.backgroundImage.substring(0, 60) : 'n/a'
            });
        } else {
            _log.error('RENDER_CARDS', '❌ Nenhum card encontrado no DOM após render!');
        }
        _log.info('RENDER_CARDS', `Total de cards no DOM: ${imagesGrid.querySelectorAll('.image-card').length}`);
        _log.end();
    });
}

// ================================================================
// VIEW: PATIENT IMAGES
// ================================================================

function openPatient(patient) {
    selectedPatient = patient;
    view = 'patient-images';
    backBtn.style.display = 'inline-flex';
    patientHeader.style.display = 'block';

    const fullName = patient.patient_name || 'Sem nome';
    patientTitle.textContent = fullName;
    patientMeta.textContent  = `${patient.image_count || 0} imagem(ns) · ${patient.doctor || '—'}`;

    loadPatientImages(patient.patient_name);
}

async function loadPatientImages(patientName) {
    _log.group('LOAD_IMAGES');
    _log.info('LOAD_IMAGES', `Carregando imagens de: "${patientName}"`);

    loadingState.style.display = 'block';
    imagesGrid.style.display = 'none';
    emptyState.style.display = 'none';

    try {
        const url = `/api/images/by-patient?name=${encodeURIComponent(patientName)}&disabled=${showDisabled}`;
        const res = await fetchWithAuth(url);

        if (!res.ok) {
            let errBody = '';
            try { errBody = await res.text(); } catch (_) {}
            _log.error('LOAD_IMAGES', `HTTP ${res.status}:`, errBody);
            throw new Error(`HTTP ${res.status}: ${errBody}`);
        }

        patientImages = await res.json();
        _log.info('LOAD_IMAGES', `✅ ${patientImages.length} imagem(ns) recebida(s)`);
        loadingState.style.display = 'none';

        if (patientImages.length === 0) {
            _log.warn('LOAD_IMAGES', 'Nenhuma imagem encontrada');
            emptyState.style.display = 'block';
            imagesGrid.style.display = 'none';
        } else {
            emptyState.style.display = 'none';
            imagesGrid.style.display = 'grid';
            renderPatientImages();
        }
    } catch (e) {
        _log.error('LOAD_IMAGES', '❌ Exceção:', e.message, e);
        loadingState.style.display = 'none';
        emptyState.style.display = 'block';
        showErrorBanner('Erro ao carregar imagens', e.message);
        showToast('Erro ao carregar imagens', 'error');
    } finally {
        _log.end();
    }
}

function renderPatientImages() {
    imagesGrid.innerHTML = patientImages.map(image => `
        <div class="image-card ${!image.enabled ? 'disabled' : ''}" data-id="${image.id}" onclick="handleImageClick(${image.id})">
            <div class="image-preview" style="background-image: url('/uploads/${image.filename}'); background-size: cover; background-position: center;"></div>
            <div class="image-info">
                <div class="image-meta"><span>📅 ${formatDate(image.created_at)}</span></div>
                <div class="image-guid">${escapeHtml(image.image_guid || image.filename)}</div>
                <div class="image-actions">
                    <button class="btn btn-primary btn-small" style="flex:1" onclick="handleImageClick(${image.id}); event.stopPropagation();">
                        🔄 Orientar
                    </button>
                    <button class="btn btn-small" style="flex:1; background:${image.enabled ? 'rgba(255,107,107,0.12)' : 'rgba(81,207,102,0.12)'}; color:${image.enabled ? '#c0392b' : '#27ae60'}; border:1px solid ${image.enabled ? 'rgba(255,107,107,0.3)' : 'rgba(81,207,102,0.3)'};" onclick="toggleImageEnabled(${image.id}); event.stopPropagation();">
                        ${image.enabled ? '🚫' : '✅'}
                    </button>
                </div>
            </div>
            ${!image.enabled ? '<div class="image-badge">Desabilitada</div>' : ''}
        </div>
    `).join('');
}

// ================================================================
// IMAGE CLICK → TRANSFORM MODAL
// ================================================================

async function handleImageClick(imageId) {
    selectedImageId = imageId;
    await showTransformModal(imageId);
}

async function showTransformModal(imageId) {
    transformModal.classList.add('active');
    
    // Default view is 'transform'
    toggleModalView('transform');

    // Find image to show details
    const image = patientImages.find(img => img.id === imageId);
    
    // Check if the image has been modified (has original_image_id)
    const btnResetImage = document.getElementById('btnResetImage');
    if (image && image.original_image_id) {
        btnResetImage.style.display = 'flex';
        btnResetImage.setAttribute('data-modified', 'true');
    } else {
        btnResetImage.style.display = 'none';
        btnResetImage.setAttribute('data-modified', 'false');
    }

    if (image) {
        document.getElementById('transformModalTitle').innerText = `${escapeHtml(image.patient_name || 'Desconhecido')} - ${formatDate(image.created_at)}`;
        
        document.getElementById('transformExtraInfo').innerHTML = `
            <div style="margin-bottom: 5px;"><strong>👨‍⚕️ Dentista:</strong> ${escapeHtml(image.doctor || 'Não informado')}</div>
            <div><strong>📝 Obs:</strong> ${escapeHtml(image.remark || 'Nenhuma observação')}</div>
        `;
        document.getElementById('transformExtraInfo').style.display = 'none'; // Keep hidden by default
        
        loadGtosForPatient(image.patient_name);
    } else {
        document.getElementById('transformModalTitle').innerText = `Opções da Imagem`;
        document.getElementById('transformExtraInfo').innerHTML = '';
        document.getElementById('transformExtraInfo').style.display = 'none';
    }

    document.getElementById('transformOptions').innerHTML = `
        <div style="grid-column:1/-1; text-align:center; padding:40px 0; color:#888;">
            <div class="spinner" style="margin:0 auto 16px;"></div>
            <p>Gerando variações...</p>
        </div>`;

    try {
        const res = await fetchWithAuth(`/api/images/${imageId}/transformations`);
        if (!res.ok) {
            if (res.status === 401 || res.status === 403) { localStorage.removeItem('auth_token'); window.location.href = '/login'; return; }
            throw new Error('Erro ao gerar transformações');
        }

        const transformations = await res.json();
        currentTransformations = transformations;

        const container = document.getElementById('transformOptions');
        container.innerHTML = transformations.map((t, i) => `
            <div class="transform-option" data-index="${i}" onclick="selectTransform(${i})">
                <img src="${t.base64}" alt="${escapeHtml(t.name)}" loading="lazy">
                <div class="transform-name">${escapeHtml(t.name)}</div>
            </div>
        `).join('');

        // ---------------------------------------------------------------
        // Detectar orientação da imagem original → aplicar layout correto
        // ---------------------------------------------------------------
        if (transformations.length > 0 && transformations[0].base64) {
            const probe = new Image();
            probe.onload = () => {
                const orientation = probe.naturalWidth >= probe.naturalHeight ? 'landscape' : 'portrait';
                container.classList.remove('grid-landscape', 'grid-portrait');
                container.classList.add(`grid-${orientation}`);
                _log.info('TRANSFORM', `Orientação detectada: ${orientation} (${probe.naturalWidth}×${probe.naturalHeight})`);
            };
            probe.onerror = () => {
                _log.warn('TRANSFORM', 'Não foi possível detectar orientação — usando fallback');
            };
            probe.src = transformations[0].base64;
        }

    } catch (e) {
        _log.error('TRANSFORM', '❌ Exceção:', e.message, e);
        showToast('Erro ao gerar variações', 'error');
        transformModal.classList.remove('active');
    }
}


function selectTransform(index) {
    const el = document.querySelector(`.transform-option[data-index="${index}"]`);
    if (el.classList.contains('selected')) {
        // If clicking the already selected one, clear selection
        clearTransformSelection();
        return;
    }

    const container = document.getElementById('transformOptions');
    container.classList.add('selection-mode');

    document.querySelectorAll('.transform-option').forEach(option => {
        option.classList.remove('selected');
        const optIndex = parseInt(option.getAttribute('data-index'));
        if (optIndex === 0 || optIndex === index) {
            option.style.display = 'block';
        } else {
            option.style.display = 'none';
        }
    });

    el.classList.add('selected');
    
    // Show action area
    document.getElementById('transformActionArea').style.display = 'block';
    
    // Pre-fill remark if we have an image
    const image = patientImages.find(img => img.id === selectedImageId);
    if (image && !document.getElementById('newImageRemark').value) {
        document.getElementById('newImageRemark').value = image.remark || '';
    }
}

function clearTransformSelection() {
    const container = document.getElementById('transformOptions');
    container.classList.remove('selection-mode');
    
    document.querySelectorAll('.transform-option').forEach(option => {
        option.classList.remove('selected');
        option.style.display = 'block';
    });
    
    document.getElementById('transformActionArea').style.display = 'none';
    document.getElementById('newImageRemark').value = '';
}

async function saveSelectedTransform() {
    const selectedEl = document.querySelector('.transform-option.selected');
    if (!selectedEl) {
        showToast('Selecione uma orientação primeiro.', 'error');
        return;
    }

    const index = parseInt(selectedEl.getAttribute('data-index'));
    const transform = currentTransformations[index];
    const remark = document.getElementById('newImageRemark').value.trim();

    const btn = document.getElementById('btnSaveTransform');
    const originalText = btn.innerText;
    btn.innerText = 'Salvando...';
    btn.disabled = true;

    try {
        const payload = {
            rotation: transform.rotation,
            flipH: transform.flipH,
            flipV: transform.flipV,
            remark: remark
        };

        const res = await fetchWithAuth(`/api/images/${selectedImageId}/transform`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ rotation: transform.rotation, flipH: transform.flipH, flipV: transform.flipV })
        });
        if (!res.ok) throw new Error('Erro ao salvar');

        transformModal.classList.remove('active');
        showToast('Orientação salva!', 'success');
        if (selectedPatient) loadPatientImages(selectedPatient.patient_name);
    } catch (e) {
        console.error(e);
        showToast('Erro ao salvar orientação', 'error');
    }
}

async function toggleImageEnabled(imageId) {
    try {
        const res = await fetchWithAuth(`/api/images/${imageId}/toggle-enabled`, { method: 'PUT' });
        if (!res.ok) throw new Error();
        const result = await res.json();
        showToast(result.enabled ? 'Imagem habilitada!' : 'Imagem desabilitada!', 'success');
        if (selectedPatient) loadPatientImages(selectedPatient.patient_name);
    } catch {
        showToast('Erro ao alterar status', 'error');
    }
}

// ================================================================
// UTILITY FUNCTIONS
// ================================================================

function escapeHtml(text) {
    if (!text) return '';
    const d = document.createElement('div');
    d.textContent = text;
    return d.innerHTML;
}

function formatDate(dateString) {
    if (!dateString) return '—';
    const date = new Date(dateString);
    return date.toLocaleString('pt-BR', { day: '2-digit', month: '2-digit', year: 'numeric', hour: '2-digit', minute: '2-digit' });
}

function debounce(func, wait) {
    let timeout;
    return function (...args) {
        clearTimeout(timeout);
        timeout = setTimeout(() => func(...args), wait);
    };
}

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

function openPatientByIndex(index) {
    if (patients[index]) {
        openPatient(patients[index]);
    }
}

window.openPatient        = openPatient;
window.openPatientByIndex = openPatientByIndex;
window.handleImageClick   = handleImageClick;
window.selectTransform    = selectTransform;
window.toggleImageEnabled = toggleImageEnabled;

// ================================================================
// PATIENT CREATION (DENTAL SENSOR)
// ================================================================

function openCreatePatientModal() {
    document.getElementById('create-patient-modal').classList.add('active');
}

function closeCreatePatientModal() {
    document.getElementById('create-patient-modal').classList.remove('active');
    document.getElementById('create-patient-form').reset();
}

async function submitCreatePatient(event) {
    event.preventDefault();
    
    const submitBtn = event.target.querySelector('button[type="submit"]');
    const originalText = submitBtn.textContent;
    submitBtn.textContent = 'Salvando...';
    submitBtn.disabled = true;

    const payload = {
        firstName: document.getElementById('patient-first-name').value.trim(),
        lastName: document.getElementById('patient-last-name').value.trim(),
        doctor: document.getElementById('patient-doctor').value.trim(),
        birthday: document.getElementById('patient-birthday').value || null,
        gender: document.getElementById('patient-gender').value,
        phone: document.getElementById('patient-phone').value.trim(),
        remark: document.getElementById('patient-remark').value.trim()
    };

    try {
        const response = await fetchWithAuth(`${API_URL}/patients`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload)
        });

        if (response.ok) {
            showToast('Paciente criado com sucesso no Dental Sensor!', 'success');
            closeCreatePatientModal();
        } else {
            const err = await response.json();
            alert('Erro ao criar paciente: ' + (err.error || 'Desconhecido'));
        }
    } catch (err) {
        console.error(err);
        alert('Erro ao conectar com o servidor para criar paciente.');
    } finally {
        submitBtn.textContent = originalText;
        submitBtn.disabled = false;
    }
}

// ================================================================
// GTO LOGIC
// ================================================================

function toggleModalView(view) {
    const transformViewWrapper = document.getElementById('transformViewWrapper');
    const gtoView = document.getElementById('gtoView');
    const btnShowTransform = document.getElementById('btnShowTransform');
    const btnShowGto = document.getElementById('btnShowGto');
    const btnResetImage = document.getElementById('btnResetImage');

    if (view === 'transform') {
        transformViewWrapper.style.display = 'flex';
        gtoView.style.display = 'none';
        btnShowTransform.className = 'btn btn-primary';
        btnShowGto.className = 'btn btn-secondary';
        
        // Restore reset button visibility if image is modified
        if (btnResetImage.getAttribute('data-modified') === 'true') {
            btnResetImage.style.display = 'flex';
        }
    } else {
        transformViewWrapper.style.display = 'none';
        gtoView.style.display = 'block';
        btnShowTransform.className = 'btn btn-secondary';
        btnShowGto.className = 'btn btn-primary';
        
        // Hide reset button in GTO view
        btnResetImage.style.display = 'none';
    }
}

function toggleModalInfo() {
    const infoDiv = document.getElementById('transformExtraInfo');
    const btnShowInfo = document.getElementById('btnShowInfo');
    if (infoDiv.style.display === 'none') {
        infoDiv.style.display = 'block';
        btnShowInfo.className = 'btn btn-primary';
    } else {
        infoDiv.style.display = 'none';
        btnShowInfo.className = 'btn btn-secondary';
    }
}

async function loadGtosForPatient(patientName) {
    const container = document.getElementById('gtoListContainer');
    container.innerHTML = '<div style="padding:20px; text-align:center; color:#888;">Carregando GTOs...</div>';
    
    try {
        const res = await fetchWithAuth(`/api/gtos?patient=${encodeURIComponent(patientName)}`);
        if (!res.ok) throw new Error('Erro ao carregar GTOs');
        const gtos = await res.json();
        
        if (gtos.length === 0) {
            container.innerHTML = '<div style="padding:20px; text-align:center; color:#888;">Nenhuma GTO cadastrada para este paciente.</div>';
            return;
        }

        let html = '<ul style="list-style:none; padding:0; margin:0;">';
        gtos.forEach((gto, idx) => {
            const bg = idx % 2 === 0 ? '#fff' : '#f9f9f9';
            html += `
                <li style="display:flex; justify-content:space-between; align-items:center; padding:15px; background:${bg}; border-bottom:1px solid #eee;">
                    <div>
                        <div style="font-weight:600; font-size:1.05rem;">${escapeHtml(gto.gto_number)}</div>
                        <div style="color:#666; font-size:0.9rem;">${escapeHtml(gto.description || 'Sem descrição')}</div>
                        <div style="color:#999; font-size:0.8rem; margin-top:4px;">📅 ${formatDate(gto.created_at)}</div>
                    </div>
                    <div>
                        <button class="btn btn-primary btn-small" onclick="linkImageToGto(${gto.id}, this)">✅ Vincular</button>
                    </div>
                </li>
            `;
        });
        html += '</ul>';
        container.innerHTML = html;
        
    } catch (e) {
        console.error(e);
        container.innerHTML = '<div style="padding:20px; text-align:center; color:red;">Erro ao carregar GTOs</div>';
    }
}

async function inlineCreateGto() {
    const numberInput = document.getElementById('inlineGtoNumber');
    const descInput = document.getElementById('inlineGtoDesc');
    
    const number = numberInput.value.trim();
    if (!number) {
        showToast('O Número da GTO é obrigatório.', 'error');
        return;
    }

    const image = patientImages.find(img => img.id === selectedImageId);
    if (!image || !image.patient_name) {
        showToast('Erro: Paciente não identificado.', 'error');
        return;
    }

    const payload = {
        gto_number: number,
        description: descInput.value.trim(),
        patient_name: image.patient_name
    };

    try {
        const res = await fetchWithAuth('/api/gtos', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload)
        });
        
        if (!res.ok) throw new Error('Erro ao criar GTO');
        
        showToast('GTO criada com sucesso!', 'success');
        
        // Limpar inputs
        numberInput.value = '';
        descInput.value = '';
        
        // Recarregar lista
        await loadGtosForPatient(image.patient_name);
        
    } catch (e) {
        console.error(e);
        showToast('Erro ao criar GTO.', 'error');
    }
}

async function linkImageToGto(gtoId, btnElement) {
    if (!gtoId) return;
    
    const originalText = btnElement.innerText;
    btnElement.innerText = 'Vinculando...';
    btnElement.disabled = true;
    
    try {
        const res = await fetchWithAuth(`/api/gtos/${gtoId}/images`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ image_id: selectedImageId })
        });
        
        if (!res.ok) {
            const err = await res.json();
            throw new Error(err.error || 'Erro ao vincular');
        }
        
        showToast('Imagem vinculada à GTO!', 'success');
        btnElement.innerText = 'Vinculada!';
        btnElement.classList.replace('btn-primary', 'btn-success');
    } catch (e) {
        console.error(e);
        showToast(e.message, 'error');
        btnElement.innerText = originalText;
        btnElement.disabled = false;
    }
}

async function resetImageToOriginal() {
    if (!confirm('Tem certeza que deseja restaurar esta imagem para o estado original em que foi capturada pelo sensor? Rotações, espelhamentos e observações serão descartados.')) {
        return;
    }

    const btn = document.getElementById('btnResetImage');
    const originalContent = btn.innerHTML;
    btn.innerHTML = '<div class="spinner" style="width: 16px; height: 16px; border-width: 2px; border-top-color: white;"></div>';
    btn.disabled = true;

    try {
        const payload = {
            rotation: 0,
            flipH: false,
            flipV: false,
            remark: ''
        };

        const res = await fetchWithAuth(`/api/images/${selectedImageId}/transform`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload)
        });

        if (!res.ok) throw new Error('Erro ao resetar imagem');

        showToast('Imagem restaurada para o original!', 'success');
        
        transformModal.classList.remove('active');
        clearTransformSelection();

        const patientName = patientImages.find(img => img.id === selectedImageId)?.patient_name;
        await loadPatients();
        if (patientName) {
            await loadPatientImages(patientName);
        }

    } catch (e) {
        console.error(e);
        showToast('Erro ao restaurar a imagem.', 'error');
    } finally {
        btn.innerHTML = originalContent;
        btn.disabled = false;
    }
}

// Global scope exposures
window.handleImageClick = handleImageClick;
window.toggleImageEnabled = toggleImageEnabled;
window.selectTransform = selectTransform;
window.openCreatePatientModal = openCreatePatientModal;
window.closeCreatePatientModal = closeCreatePatientModal;
window.submitCreatePatient = submitCreatePatient;
window.toggleModalView = toggleModalView;
window.toggleModalInfo = toggleModalInfo;
window.inlineCreateGto = inlineCreateGto;
window.saveSelectedTransform = saveSelectedTransform;
window.clearTransformSelection = clearTransformSelection;
window.resetImageToOriginal = resetImageToOriginal;

// ================================================================
// CONFIGURAÇÕES (Trocar Usuário/Senha)
// ================================================================

function openSettingsModal() {
    const modal = document.getElementById('settingsModal');
    if (modal) modal.style.display = 'block';
    
    // Limpar form
    document.getElementById('currentPassword').value = '';
    document.getElementById('newUsername').value = '';
    document.getElementById('newPassword').value = '';
}

function closeSettingsModal() {
    const modal = document.getElementById('settingsModal');
    if (modal) modal.style.display = 'none';
}

async function updateCredentials(event) {
    event.preventDefault();
    
    const currentPassword = document.getElementById('currentPassword').value;
    const newUsername = document.getElementById('newUsername').value.trim();
    const newPassword = document.getElementById('newPassword').value;
    
    if (!currentPassword) {
        showToast('A senha atual é obrigatória.', 'error');
        return;
    }
    
    if (!newUsername && !newPassword) {
        showToast('Preencha um novo usuário ou nova senha.', 'error');
        return;
    }
    
    const btn = document.getElementById('btnSaveSettings');
    const originalText = btn.innerHTML;
    btn.innerHTML = '<span class="spinner" style="width:14px;height:14px;display:inline-block;"></span> Salvando...';
    btn.disabled = true;
    
    try {
        const token = getAuthToken();
        const res = await fetch(`${API_URL}/auth/update-credentials`, {
            method: 'PUT',
            headers: { 
                'Content-Type': 'application/json',
                'Authorization': `Bearer ${token}`
            },
            body: JSON.stringify({ currentPassword, newUsername, newPassword })
        });
        
        const data = await res.json();
        
        if (!res.ok) {
            throw new Error(data.error || 'Erro ao atualizar credenciais.');
        }
        
        // Sucesso
        showToast('Credenciais atualizadas com sucesso!', 'success');
        
        // Atualizar token no localStorage se tiver um novo
        if (data.token) {
            localStorage.setItem('auth_token', data.token);
        }
        
        closeSettingsModal();
        
    } catch (e) {
        console.error(e);
        showToast(e.message, 'error');
    } finally {
        btn.innerHTML = originalText;
        btn.disabled = false;
    }
}

// Global scope
window.openSettingsModal = openSettingsModal;
window.closeSettingsModal = closeSettingsModal;
window.updateCredentials = updateCredentials;

// ================================================================
// GERENCIAMENTO DE CLÍNICAS (ADMIN)
// ================================================================

function showAdminClinics() {
    view = 'admin-clinics';
    document.querySelector('.content-scroll').scrollTop = 0;
    
    // Esconder outras visões
    imagesGrid.style.display = 'none';
    emptyState.style.display = 'none';
    patientHeader.style.display = 'none';
    backBtn.style.display = 'none';
    
    // Mostrar painel admin
    document.getElementById('adminClinicsState').style.display = 'block';
    
    // Atualizar menu
    document.querySelectorAll('.nav-item').forEach(el => el.classList.remove('active'));
    document.getElementById('navAdminClinics').classList.add('active');
    
    loadAdminClinics();
}

// Override para voltar aos pacientes e esconder o admin state
const originalShowPatientsView = showPatientsView;
showPatientsView = function() {
    document.getElementById('adminClinicsState').style.display = 'none';
    document.querySelectorAll('.nav-item').forEach(el => el.classList.remove('active'));
    document.querySelector('a[href="/"]').classList.add('active');
    originalShowPatientsView();
};
window.showPatientsView = showPatientsView;

async function loadAdminClinics() {
    const tbody = document.getElementById('clinicsTableBody');
    tbody.innerHTML = '<tr><td colspan="6" style="text-align: center; padding: 20px;">Carregando...</td></tr>';
    
    try {
        const res = await fetchWithAuth(`${API_URL}/auth/users`);
        if (!res.ok) throw new Error('Erro ao carregar clínicas');
        const data = await res.json();
        
        if (data.users.length === 0) {
            tbody.innerHTML = '<tr><td colspan="6" style="text-align: center; padding: 20px;">Nenhuma clínica cadastrada.</td></tr>';
            return;
        }
        
        tbody.innerHTML = data.users.map(u => `
            <tr style="border-bottom: 1px solid #eee;">
                <td style="padding: 12px 15px;">#${u.id}</td>
                <td style="padding: 12px 15px;"><strong>${escapeHtml(u.username)}</strong>${u.is_admin ? ' <span style="background: #e3f2fd; color: #1976d2; padding: 2px 6px; border-radius: 4px; font-size: 11px;">Admin</span>' : ''}</td>
                <td style="padding: 12px 15px;">${escapeHtml(u.clinic_name || '—')}</td>
                <td style="padding: 12px 15px;">${escapeHtml(u.email)}</td>
                <td style="padding: 12px 15px;">${escapeHtml(u.pc_name || '—')}</td>
                <td style="padding: 12px 15px; text-align: center;">
                    <button class="btn btn-primary btn-small" onclick="generateClinicToken(${u.id})" title="Gerar Token">🔑 Token</button>
                    ${u.id !== currentUser.id ? `<button class="btn btn-danger btn-small" onclick="deleteClinic(${u.id}, '${escapeHtml(u.username)}')" title="Excluir">🗑️</button>` : ''}
                </td>
            </tr>
        `).join('');
    } catch (e) {
        tbody.innerHTML = '<tr><td colspan="6" style="text-align: center; padding: 20px; color: red;">Erro ao carregar dados.</td></tr>';
    }
}

function openCreateClinicModal() {
    document.getElementById('createClinicModal').style.display = 'block';
}

function closeCreateClinicModal() {
    document.getElementById('createClinicModal').style.display = 'none';
    document.getElementById('createClinicForm').reset();
}

async function submitCreateClinic(event) {
    event.preventDefault();
    
    const btn = event.target.querySelector('button[type="submit"]');
    const originalText = btn.innerHTML;
    btn.innerHTML = 'Salvando...';
    btn.disabled = true;
    
    const payload = {
        username: document.getElementById('clinicUsername').value.trim(),
        email: document.getElementById('clinicEmail').value.trim(),
        password: document.getElementById('clinicPassword').value,
        clinic_name: document.getElementById('clinicName').value.trim(),
        pc_name: document.getElementById('clinicPcName').value.trim()
    };
    
    try {
        const res = await fetchWithAuth(`${API_URL}/auth/create-user`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload)
        });
        
        const data = await res.json();
        if (!res.ok) throw new Error(data.error || 'Erro ao criar');
        
        showToast('Clínica cadastrada com sucesso!', 'success');
        closeCreateClinicModal();
        loadAdminClinics();
    } catch (e) {
        alert(e.message);
    } finally {
        btn.innerHTML = originalText;
        btn.disabled = false;
    }
}

async function deleteClinic(id, username) {
    if (!confirm(`Tem certeza que deseja excluir permanentemente o acesso da clínica "${username}"?`)) return;
    
    try {
        const res = await fetchWithAuth(`${API_URL}/auth/users/${id}`, { method: 'DELETE' });
        if (!res.ok) throw new Error('Erro ao excluir');
        showToast('Clínica excluída', 'success');
        loadAdminClinics();
    } catch (e) {
        showToast(e.message, 'error');
    }
}

async function generateClinicToken(id) {
    try {
        const res = await fetchWithAuth(`${API_URL}/auth/users/${id}/token`, { method: 'POST' });
        if (!res.ok) throw new Error('Erro ao gerar token');
        const data = await res.json();
        
        document.getElementById('clinicTokenInput').value = data.token;
        document.getElementById('tokenCopySuccess').style.display = 'none';
        document.getElementById('showTokenModal').style.display = 'block';
    } catch (e) {
        showToast(e.message, 'error');
    }
}

function closeShowTokenModal() {
    document.getElementById('showTokenModal').style.display = 'none';
}

function copyTokenToClipboard() {
    const input = document.getElementById('clinicTokenInput');
    input.select();
    input.setSelectionRange(0, 99999);
    navigator.clipboard.writeText(input.value).then(() => {
        document.getElementById('tokenCopySuccess').style.display = 'block';
    });
}

// Admin Exports
window.showAdminClinics = showAdminClinics;
window.openCreateClinicModal = openCreateClinicModal;
window.closeCreateClinicModal = closeCreateClinicModal;
window.submitCreateClinic = submitCreateClinic;
window.deleteClinic = deleteClinic;
window.generateClinicToken = generateClinicToken;
window.closeShowTokenModal = closeShowTokenModal;
window.copyTokenToClipboard = copyTokenToClipboard;

// A aplicação é inicializada no evento DOMContentLoaded acima