// Globale Variablen
let currentData = null;
let currentTargetId = null;
let currentLicenseType = null;
let formData = {};

// Utility-Funktionen
function showLoading() {
    document.getElementById('loadingOverlay').style.display = 'flex';
}

function hideLoading() {
    document.getElementById('loadingOverlay').style.display = 'none';
}

function showError(message) {
    // Hier könnte eine Toast-Notification implementiert werden
    console.error(message);
    alert(message); // Temporär
}

function showSuccess(message) {
    // Hier könnte eine Toast-Notification implementiert werden
    console.log(message);
}

// Validierungsfunktionen
function validateDate(dateString) {
    const regex = /^\d{2}\.\d{2}\.\d{4}$/;
    if (!regex.test(dateString)) return false;
    
    const [day, month, year] = dateString.split('.').map(Number);
    const date = new Date(year, month - 1, day);
    
    return date.getFullYear() === year && 
           date.getMonth() === month - 1 && 
           date.getDate() === day &&
           year >= 1900 && year <= 2100;
}

function validateUrl(url) {
    if (!url || url.trim() === '') return true; // Optional
    try {
        new URL(url);
        return url.startsWith('http://') || url.startsWith('https://');
    } catch {
        return false;
    }
}

function validateEmail(email) {
    const regex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    return regex.test(email);
}

// NUI Message Handler
window.addEventListener('message', function(event) {
    const data = event.data;
    
    switch(data.action) {
        case 'openMainMenu':
            openMainMenu(data.data);
            break;
        case 'openCustomLicenseForm':
            openCustomLicenseForm(data.data);
            break;
        case 'showLicense':
            showLicense(data.data);
            break;
        case 'showMyLicense':
            showMyLicense(data.data);
            break;
        case 'showPlayerLicenses':
            showPlayerLicenses(data.data);
            break;
    }
});

// Hauptmenü öffnen
function openMainMenu(data) {
    currentData = data;
    currentTargetId = data.targetId;
    
    // Target-Sektion anzeigen/verstecken
    const targetSection = document.getElementById('targetSection');
    const targetDistance = document.getElementById('targetDistance');
    
    if (data.hasTarget) {
        targetSection.style.display = 'block';
        targetDistance.textContent = data.targetDistance.toFixed(1);
        
        // Lizenz-Buttons generieren
        generateLicenseButtons(data.licenseTypes);
    } else {
        targetSection.style.display = 'none';
    }
    
    document.getElementById('mainMenu').style.display = 'flex';
}

// Lizenz-Buttons generieren
function generateLicenseButtons(licenseTypes) {
    const container = document.getElementById('licenseButtons');
    container.innerHTML = '';
    
    Object.keys(licenseTypes).forEach(licenseType => {
        const config = licenseTypes[licenseType];
        
        const button = document.createElement('button');
        button.className = 'menu-btn';
        button.style.background = `linear-gradient(135deg, ${config.color} 0%, ${adjustColor(config.color, -20)} 100%)`;
        button.onclick = () => openLicenseCreation(licenseType);
        
        button.innerHTML = `
            <i class="${config.icon}"></i>
            <span>${config.label}</span>
        `;
        
        container.appendChild(button);
    });
}

// Farbe anpassen (für Gradient)
function adjustColor(color, amount) {
    const usePound = color[0] === '#';
    const col = usePound ? color.slice(1) : color;
    const num = parseInt(col, 16);
    let r = (num >> 16) + amount;
    let g = (num >> 8 & 0x00FF) + amount;
    let b = (num & 0x0000FF) + amount;
    r = r > 255 ? 255 : r < 0 ? 0 : r;
    g = g > 255 ? 255 : g < 0 ? 0 : g;
    b = b > 255 ? 255 : b < 0 ? 0 : b;
    return (usePound ? '#' : '') + (r << 16 | g << 8 | b).toString(16).padStart(6, '0');
}

// Erweiterte Lizenz-Erstellung öffnen
function openCustomLicenseForm(data) {
    currentData = data;
    currentTargetId = data.targetId;
    currentLicenseType = data.licenseType;
    formData = {};
    
    const config = data.config;
    
    // Titel setzen
    document.getElementById('formTitle').textContent = `${config.label} erstellen`;
    
    // Inhaber-Name setzen (würde normalerweise vom Server kommen)
    document.getElementById('holderName').value = 'Spieler Name'; // Placeholder
    
    // Benutzerdefinierte Felder generieren
    generateCustomFields(config.custom_fields || []);
    
    // Klassen-Sektion (falls vorhanden)
    if (config.classes) {
        generateClassesSection(config.classes);
        document.getElementById('classesSection').style.display = 'block';
    } else {
        document.getElementById('classesSection').style.display = 'none';
    }
    
    // Vorschau initialisieren
    updatePreview();
    
    // Form-Event-Listener
    setupFormEventListeners();
    
    document.getElementById('customLicenseForm').style.display = 'flex';
}

// Benutzerdefinierte Felder generieren
function generateCustomFields(fields) {
    const container = document.getElementById('customFields');
    container.innerHTML = '';
    
    fields.forEach(field => {
        const fieldDiv = document.createElement('div');
        fieldDiv.className = 'form-group';
        
        const label = document.createElement('label');
        label.textContent = field.label + (field.required ? ' *' : '');
        label.setAttribute('for', field.name);
        
        let input;
        
        switch(field.type) {
            case 'text':
            case 'date':
            case 'number':
            case 'url':
            case 'email':
                input = document.createElement('input');
                input.type = field.type === 'date' ? 'text' : field.type;
                input.placeholder = field.placeholder || '';
                break;
                
            case 'textarea':
                input = document.createElement('textarea');
                input.placeholder = field.placeholder || '';
                input.rows = 3;
                break;
                
            case 'select':
                input = document.createElement('select');
                const defaultOption = document.createElement('option');
                defaultOption.value = '';
                defaultOption.textContent = 'Bitte wählen...';
                input.appendChild(defaultOption);
                
                field.options.forEach(option => {
                    const optionElement = document.createElement('option');
                    optionElement.value = option.value;
                    optionElement.textContent = option.label;
                    input.appendChild(optionElement);
                });
                break;
        }
        
        input.id = field.name;
        input.name = field.name;
        input.required = field.required || false;
        
        // Event-Listener für Live-Validierung
        input.addEventListener('input', () => {
            validateField(field, input);
            updatePreview();
        });
        
        input.addEventListener('blur', () => {
            validateField(field, input);
        });
        
        fieldDiv.appendChild(label);
        fieldDiv.appendChild(input);
        
        // Spezielle Behandlung für Bild-URL
        if (field.type === 'url' && field.name.includes('photo') || field.name.includes('logo')) {
            const imagePreview = document.createElement('div');
            imagePreview.className = 'image-preview';
            imagePreview.id = field.name + '_preview';
            
            const placeholder = document.createElement('div');
            placeholder.className = 'image-placeholder';
            placeholder.innerHTML = '<i class="fas fa-image"></i><br>Vorschau';
            imagePreview.appendChild(placeholder);
            
            fieldDiv.appendChild(imagePreview);
            
            // Bild-Validierung
            input.addEventListener('input', () => {
                validateImageUrl(input.value, field.name);
            });
        }
        
        container.appendChild(fieldDiv);
    });
}

// Klassen-Sektion generieren
function generateClassesSection(classes) {
    const container = document.getElementById('classesContainer');
    container.innerHTML = '';
    
    const checkboxGroup = document.createElement('div');
    checkboxGroup.className = 'checkbox-group';
    
    Object.keys(classes).forEach(classKey => {
        const checkboxItem = document.createElement('div');
        checkboxItem.className = 'checkbox-item';
        
        const checkbox = document.createElement('input');
        checkbox.type = 'checkbox';
        checkbox.id = 'class_' + classKey;
        checkbox.name = 'classes';
        checkbox.value = classKey;
        
        const label = document.createElement('label');
        label.setAttribute('for', 'class_' + classKey);
        label.textContent = `${classKey} - ${classes[classKey]}`;
        
        checkbox.addEventListener('change', updatePreview);
        
        checkboxItem.appendChild(checkbox);
        checkboxItem.appendChild(label);
        checkboxGroup.appendChild(checkboxItem);
    });
    
    container.appendChild(checkboxGroup);
}

// Feld-Validierung
function validateField(field, input) {
    const value = input.value.trim();
    const formGroup = input.closest('.form-group');
    
    // Vorherige Fehlermeldungen entfernen
    const existingError = formGroup.querySelector('.error-message');
    if (existingError) {
        existingError.remove();
    }
    formGroup.classList.remove('error');
    
    // Pflichtfeld-Prüfung
    if (field.required && !value) {
        showFieldError(formGroup, 'Dieses Feld ist erforderlich');
        return false;
    }
    
    if (!value) return true; // Optional und leer
    
    // Typ-spezifische Validierung
    let isValid = true;
    let errorMessage = '';
    
    switch(field.type) {
        case 'date':
            isValid = validateDate(value);
            errorMessage = 'Ungültiges Datum (Format: TT.MM.JJJJ)';
            break;
            
        case 'url':
            isValid = validateUrl(value);
            errorMessage = 'Ungültige URL (muss mit http:// oder https:// beginnen)';
            break;
            
        case 'email':
            isValid = validateEmail(value);
            errorMessage = 'Ungültige E-Mail-Adresse';
            break;
            
        case 'number':
            isValid = !isNaN(value) && value > 0;
            errorMessage = 'Muss eine positive Zahl sein';
            break;
    }
    
    if (!isValid) {
        showFieldError(formGroup, errorMessage);
        return false;
    }
    
    // Erfolg anzeigen
    showFieldSuccess(formGroup);
    return true;
}

// Feld-Fehler anzeigen
function showFieldError(formGroup, message) {
    formGroup.classList.add('error');
    
    const errorDiv = document.createElement('div');
    errorDiv.className = 'error-message';
    errorDiv.innerHTML = `<i class="fas fa-exclamation-triangle"></i> ${message}`;
    
    formGroup.appendChild(errorDiv);
}

// Feld-Erfolg anzeigen
function showFieldSuccess(formGroup) {
    const successDiv = document.createElement('div');
    successDiv.className = 'success-message';
    successDiv.innerHTML = `<i class="fas fa-check"></i> Gültig`;
    
    formGroup.appendChild(successDiv);
    
    // Nach 2 Sekunden entfernen
    setTimeout(() => {
        if (successDiv.parentNode) {
            successDiv.remove();
        }
    }, 2000);
}

// Bild-URL validieren
function validateImageUrl(url, fieldName) {
    const previewContainer = document.getElementById(fieldName + '_preview');
    if (!previewContainer) return;
    
    if (!url || url.trim() === '') {
        previewContainer.innerHTML = '<div class="image-placeholder"><i class="fas fa-image"></i><br>Vorschau</div>';
        return;
    }
    
    // Loading anzeigen
    previewContainer.innerHTML = '<div class="image-placeholder"><i class="fas fa-spinner fa-spin"></i><br>Lade...</div>';
    
    // Bild laden testen
    const img = new Image();
    img.onload = function() {
        previewContainer.innerHTML = `<img src="${url}" alt="Vorschau">`;
        updatePreview();
    };
    img.onerror = function() {
        previewContainer.innerHTML = '<div class="image-placeholder"><i class="fas fa-exclamation-triangle"></i><br>Fehler beim Laden</div>';
    };
    img.src = url;
}

// Vorschau aktualisieren
function updatePreview() {
    const config = currentData.config;
    
    // Name
    const holderName = document.getElementById('holderName').value || 'Unbekannt';
    document.getElementById('previewName').textContent = holderName;
    
    // Typ
    document.getElementById('previewType').textContent = config.label;
    
    // Foto
    const photoField = config.custom_fields.find(f => f.name.includes('photo') || f.name.includes('logo'));
    if (photoField) {
        const photoUrl = document.getElementById(photoField.name).value || currentData.ui.default_avatar;
        document.getElementById('previewPhoto').src = photoUrl;
    }
    
    // Details
    const detailsContainer = document.getElementById('previewDetails');
    detailsContainer.innerHTML = '';
    
    config.custom_fields.forEach(field => {
        if (field.name.includes('photo') || field.name.includes('logo')) return; // Skip Bilder
        
        const value = document.getElementById(field.name).value;
        if (value) {
            const fieldDiv = document.createElement('div');
            fieldDiv.className = 'preview-field';
            
            fieldDiv.innerHTML = `
                <span class="label">${field.label}:</span>
                <span class="value">${value}</span>
            `;
            
            detailsContainer.appendChild(fieldDiv);
        }
    });
    
    // Klassen
    if (config.classes) {
        const selectedClasses = Array.from(document.querySelectorAll('input[name="classes"]:checked'))
            .map(cb => cb.value);
        
        if (selectedClasses.length > 0) {
            const classesDiv = document.createElement('div');
            classesDiv.className = 'preview-field';
            
            classesDiv.innerHTML = `
                <span class="label">Klassen:</span>
                <span class="value">${selectedClasses.join(', ')}</span>
            `;
            
            detailsContainer.appendChild(classesDiv);
        }
    }
}

// Form Event-Listener einrichten
function setupFormEventListeners() {
    const form = document.getElementById('licenseForm');
    
    form.addEventListener('submit', function(e) {
        e.preventDefault();
        submitCustomLicense();
    });
}

// Benutzerdefinierte Lizenz einreichen
function submitCustomLicense() {
    const config = currentData.config;
    const customData = {};
    const classes = [];
    
    // Validierung aller Felder
    let isValid = true;
    
    config.custom_fields.forEach(field => {
        const input = document.getElementById(field.name);
        if (!validateField(field, input)) {
            isValid = false;
        }
        customData[field.name] = input.value.trim();
    });
    
    if (!isValid) {
        showError('Bitte korrigiere die markierten Fehler');
        return;
    }
    
    // Klassen sammeln
    if (config.classes) {
        const selectedClasses = Array.from(document.querySelectorAll('input[name="classes"]:checked'));
        selectedClasses.forEach(cb => {
            classes.push({
                key: cb.value,
                label: config.classes[cb.value]
            });
        });
    }
    
    showLoading();
    
    // An Client senden
    fetch(`https://${GetParentResourceName()}/submitCustomLicense`, {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            licenseType: currentLicenseType,
            targetId: currentTargetId,
            customData: customData,
            classes: classes
        })
    })
    .then(response => response.json())
    .then(data => {
        hideLoading();
        
        if (data.success) {
            showSuccess('Lizenz erfolgreich erstellt!');
            closeCustomForm();
        } else {
            showError(data.error || 'Fehler beim Erstellen der Lizenz');
        }
    })
    .catch(error => {
        hideLoading();
        showError('Netzwerkfehler: ' + error.message);
    });
}

// Lizenz anzeigen
function showLicense(data) {
    const license = data.license;
    const config = currentData?.licenseTypes?.[license.license_type] || {};
    
    document.getElementById('licenseTitle').textContent = config.label || license.license_type;
    
    const card = document.getElementById('licenseCard');
    card.innerHTML = generateLicenseCardHTML(license, config);
    
    document.getElementById('licenseDisplay').style.display = 'flex';
}

// Eigene Lizenz anzeigen
function showMyLicense(data) {
    showLicense(data); // Gleiche Funktion
}

// Spieler-Lizenzen anzeigen
function showPlayerLicenses(data) {
    document.getElementById('playerName').textContent = data.targetName;
    
    const grid = document.getElementById('licensesGrid');
    const noLicenses = document.getElementById('noLicenses');
    
    if (data.licenses.length === 0) {
        grid.style.display = 'none';
        noLicenses.style.display = 'block';
    } else {
        grid.style.display = 'grid';
        noLicenses.style.display = 'none';
        
        grid.innerHTML = '';
        
        data.licenses.forEach(license => {
            const config = data.licenseTypes[license.license_type] || {};
            const item = document.createElement('div');
            item.className = 'license-item';
            
            item.innerHTML = `
                <div class="license-item-header">
                    <div class="license-item-icon" style="background: ${config.color || '#2196f3'}">
                        <i class="${config.icon || 'fas fa-id-card'}"></i>
                    </div>
                    <div class="license-item-info">
                        <h4>${config.label || license.license_type}</h4>
                        <p>Ausgestellt: ${formatDate(license.issue_date)}</p>
                        ${license.expire_date ? `<p>Gültig bis: ${formatDate(license.expire_date)}</p>` : '<p>Unbegrenzt gültig</p>'}
                    </div>
                </div>
                <div class="license-item-actions">
                    <button class="btn btn-small btn-primary" onclick="viewLicenseDetails('${license.license_type}')">
                        <i class="fas fa-eye"></i> Anzeigen
                    </button>
                    <button class="btn btn-small btn-danger" onclick="revokeLicense('${license.license_type}')">
                        <i class="fas fa-trash"></i> Entziehen
                    </button>
                </div>
            `;
            
            grid.appendChild(item);
        });
    }
    
    document.getElementById('playerLicensesDisplay').style.display = 'flex';
}

// Lizenz-Karte HTML generieren
function generateLicenseCardHTML(license, config) {
    const customData = license.custom_data ? JSON.parse(license.custom_data) : {};
    const classes = license.classes ? JSON.parse(license.classes) : [];
    
    let html = `
        <div class="license-header">
            <h3>${config.label || license.license_type}</h3>
            <p>${config.description || 'Offizielle Lizenz'}</p>
        </div>
        
        <div class="license-content">
    `;
    
    // Foto
    const photoUrl = customData.photo_url || customData.logo_url || currentData?.ui?.default_avatar || 'https://via.placeholder.com/120x150';
    html += `
        <div class="license-photo">
            <img src="${photoUrl}" alt="Foto" onerror="this.src='https://via.placeholder.com/120x150/cccccc/666666?text=Kein+Foto'">
        </div>
    `;
    
    // Details
    html += `<div class="license-details">`;
    
    // Basis-Informationen
    html += `
        <div class="license-field">
            <span class="label">Name:</span>
            <span class="value">${license.holder_name || 'Unbekannt'}</span>
        </div>
        <div class="license-field">
            <span class="label">Lizenz-Nr.:</span>
            <span class="value">${license.id}</span>
        </div>
        <div class="license-field">
            <span class="label">Ausgestellt:</span>
            <span class="value">${formatDate(license.issue_date)}</span>
        </div>
    `;
    
    if (license.expire_date) {
        html += `
            <div class="license-field">
                <span class="label">Gültig bis:</span>
                <span class="value">${formatDate(license.expire_date)}</span>
            </div>
        `;
    }
    
    html += `
        <div class="license-field">
            <span class="label">Ausgestellt von:</span>
            <span class="value">${license.issued_by || 'System'}</span>
        </div>
    `;
    
    // Benutzerdefinierte Felder
    Object.keys(customData).forEach(key => {
        if (key.includes('photo') || key.includes('logo')) return; // Skip Bilder
        
        const value = customData[key];
        if (value) {
            const label = key.replace(/_/g, ' ').replace(/\b\w/g, l => l.toUpperCase());
            html += `
                <div class="license-field">
                    <span class="label">${label}:</span>
                    <span class="value">${value}</span>
                </div>
            `;
        }
    });
    
    html += `</div></div>`;
    
    // Klassen
    if (classes.length > 0) {
        html += `
            <div class="license-classes">
                <h4>Berechtigte Klassen</h4>
                <div class="classes-grid">
        `;
        
        classes.forEach(cls => {
            html += `<div class="class-badge">${cls.key}</div>`;
        });
        
        html += `</div></div>`;
    }
    
    return html;
}

// Datum formatieren
function formatDate(dateString) {
    if (!dateString) return 'Unbekannt';
    
    const date = new Date(dateString);
    return date.toLocaleDateString('de-DE', {
        day: '2-digit',
        month: '2-digit',
        year: 'numeric'
    });
}

// Event-Handler für Buttons
function closeMenu() {
    document.getElementById('mainMenu').style.display = 'none';
    fetch(`https://${GetParentResourceName()}/closeMenu`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({})
    });
}

function closeCustomForm() {
    document.getElementById('customLicenseForm').style.display = 'none';
}

function closeLicenseDisplay() {
    document.getElementById('licenseDisplay').style.display = 'none';
}

function closePlayerLicenses() {
    document.getElementById('playerLicensesDisplay').style.display = 'none';
}

function requestLicense() {
    fetch(`https://${GetParentResourceName()}/requestLicense`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ targetId: currentTargetId })
    });
}

function requestMyLicense(licenseType) {
    fetch(`https://${GetParentResourceName()}/requestMyLicense`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ licenseType: licenseType })
    });
}

function requestPlayerLicenses() {
    fetch(`https://${GetParentResourceName()}/requestPlayerLicenses`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ targetId: currentTargetId })
    });
}

function openLicenseCreation(licenseType) {
    fetch(`https://${GetParentResourceName()}/openLicenseCreation`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ 
            licenseType: licenseType,
            targetId: currentTargetId 
        })
    });
}

function viewLicenseDetails(licenseType) {
    // Lizenz-Details anzeigen (implementiere nach Bedarf)
    console.log('View license details:', licenseType);
}

function revokeLicense(licenseType) {
    if (confirm(`Möchtest du die ${licenseType} wirklich entziehen?`)) {
        fetch(`https://${GetParentResourceName()}/revokeLicense`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ 
                licenseType: licenseType,
                targetId: currentTargetId 
            })
        });
    }
}

// ESC-Taste zum Schließen
document.addEventListener('keydown', function(event) {
    if (event.key === 'Escape') {
        // Schließe das oberste geöffnete Menü
        if (document.getElementById('customLicenseForm').style.display === 'flex') {
            closeCustomForm();
        } else if (document.getElementById('licenseDisplay').style.display === 'flex') {
            closeLicenseDisplay();
        } else if (document.getElementById('playerLicensesDisplay').style.display === 'flex') {
            closePlayerLicenses();
        } else if (document.getElementById('mainMenu').style.display === 'flex') {
            closeMenu();
        }
    }
});

// Utility-Funktion für Resource-Name
function GetParentResourceName() {
    return 'nordi_license'; // Ersetze mit deinem Resource-Namen
}

console.log('License System UI geladen (Erweiterte Version)');