// Customer management functionality - Tailwind version
let currentPage = 0;
let currentSearch = '';
let isEditing = false;
let editingCustomerId = null;

// Enhanced table display function
function displayCustomers(customers) {
    const tbody = document.getElementById('customersTableBody');
    const emptyState = document.getElementById('emptyState');
    
    tbody.innerHTML = '';
    
    if (!customers || customers.length === 0) {
        emptyState.classList.remove('hidden');
        return;
    }
    
    emptyState.classList.add('hidden');
    
    customers.forEach(customer => {
        const row = document.createElement('tr');
        row.className = 'group border-b border-neutral-100 dark:border-neutral-700/50 hover:bg-gradient-to-r hover:from-blue-50/30 hover:to-indigo-50/30 dark:hover:from-blue-900/10 dark:hover:to-indigo-900/10 transition-all duration-200';
        
        // Store customer ID as data attribute to avoid escaping issues in onclick
        row.dataset.customerId = customer.id;
        
        // Build clean, simple row structure with clickable rows (no inline onclick to avoid backslash issues)
        row.innerHTML = `
            <td class="px-4 py-4 cursor-pointer customer-cell">
                <div class="text-sm font-mono font-semibold text-neutral-900 dark:text-neutral-100 bg-gradient-to-br from-neutral-50 to-neutral-100 dark:from-neutral-800 dark:to-neutral-700 px-3 py-2 rounded-lg shadow-sm border border-neutral-200/50 dark:border-neutral-600/50 group-hover:shadow-md transition-shadow">
                    ${escapeHtml(customer.id || '')}
                </div>
            </td>
            <td class="px-4 py-4 cursor-pointer customer-cell">
                <div class="text-sm font-semibold text-neutral-900 dark:text-neutral-100 group-hover:text-blue-700 dark:group-hover:text-blue-300 transition-colors">
                    ${escapeHtml(formatFullName(customer))}
                </div>
                ${customer.title ? `<div class="text-xs text-neutral-500 dark:text-neutral-400 mt-1 font-medium">${escapeHtml(customer.title)}</div>` : ''}
            </td>
            <td class="px-4 py-4 cursor-pointer customer-cell">
                ${customer.group ? `<span class="inline-flex items-center px-3 py-1.5 rounded-lg text-xs font-bold bg-gradient-to-r from-blue-50 to-blue-100 dark:from-blue-900/40 dark:to-blue-800/40 text-blue-800 dark:text-blue-200 border border-blue-200/70 dark:border-blue-700/70 shadow-sm">${escapeHtml(customer.group)}</span>` : '<span class="text-neutral-400 text-sm font-medium">-</span>'}
            </td>
            <td class="px-4 py-4 cursor-pointer customer-cell">
                <div class="text-sm font-medium text-neutral-900 dark:text-neutral-100">
                    ${escapeHtml(formatCityState(customer))}
                </div>
                ${customer.a1 ? `<div class="text-xs text-neutral-500 dark:text-neutral-400 mt-1 truncate max-w-xs font-medium">${escapeHtml(customer.a1)}</div>` : ''}
            </td>
            <td class="px-4 py-4 cursor-pointer customer-cell">
                <div class="text-sm font-mono font-medium text-neutral-900 dark:text-neutral-100">
                    ${formatPrimaryPhone(customer.phone_numbers || [])}
                </div>
            </td>
            <td class="px-4 py-4 cursor-pointer customer-cell">
                ${customer.email ? `<a href="mailto:${encodeURIComponent(customer.email)}" class="text-blue-600 dark:text-blue-400 hover:text-blue-800 dark:hover:text-blue-200 text-sm font-medium transition-colors underline decoration-blue-300/50 hover:decoration-blue-500" onclick="event.stopPropagation()">${escapeHtml(customer.email)}</a>` : '<span class="text-neutral-400 text-sm font-medium">-</span>'}
            </td>
            <td class="px-4 py-4 text-right">
                <div class="flex items-center justify-end space-x-2 opacity-70 group-hover:opacity-100 transition-opacity">
                    <button class="view-customer-btn inline-flex items-center px-3 py-2 bg-gradient-to-r from-slate-100 to-slate-200 dark:from-slate-700 dark:to-slate-600 text-slate-700 dark:text-slate-200 hover:from-slate-200 hover:to-slate-300 dark:hover:from-slate-600 dark:hover:to-slate-500 rounded-lg text-sm font-semibold transition-all duration-200 shadow-sm hover:shadow-md border border-slate-300/50 dark:border-slate-500/50">
                        <i class="fa-solid fa-eye mr-2"></i>
                        View
                    </button>
                    <button class="edit-customer-btn" style="display: inline-flex; align-items: center; background-color: #dc2626; color: white; padding: 8px 12px; border-radius: 6px; border: none; font-weight: 600; font-size: 14px;">
                        <i class="fa-solid fa-pencil" style="margin-right: 8px;"></i>
                        Edit
                    </button>
                </div>
            </td>
        `;
        
        // Add event listeners using the stored customer ID (no escaping issues)
        const customerCells = row.querySelectorAll('.customer-cell');
        customerCells.forEach(cell => {
            cell.addEventListener('click', () => viewCustomer(customer.id));
        });
        
        const viewBtn = row.querySelector('.view-customer-btn');
        const editBtn = row.querySelector('.edit-customer-btn');
        
        viewBtn.addEventListener('click', (e) => {
            e.stopPropagation();
            viewCustomer(customer.id);
        });
        
        editBtn.addEventListener('click', (e) => {
            e.stopPropagation();
            editCustomer(customer.id);
        });
        
        tbody.appendChild(row);
    });
}

// Helper functions
function getInitials(customer) {
    const first = (customer.first || '').trim();
    const last = (customer.last || '').trim();
    
    if (first && last) {
        return (first.charAt(0) + last.charAt(0)).toUpperCase();
    } else if (last) {
        return last.charAt(0).toUpperCase();
    } else if (first) {
        return first.charAt(0).toUpperCase();
    } else {
        return '?';
    }
}

function formatFullName(customer) {
    const parts = [];
    if (customer.prefix) parts.push(customer.prefix.trim());
    if (customer.first) parts.push(customer.first.trim());
    if (customer.middle) parts.push(customer.middle.trim());
    if (customer.last) parts.push(customer.last.trim());
    if (customer.suffix) parts.push(customer.suffix.trim());
    
    return parts.join(' ') || 'Unknown';
}

function formatCityState(customer) {
    const parts = [];
    if (customer.city) parts.push(customer.city.trim());
    if (customer.abrev) parts.push(customer.abrev.trim());
    
    return parts.join(', ') || '-';
}

function formatPrimaryPhone(phones) {
    if (!phones || phones.length === 0) {
        return '<span class="text-neutral-400">-</span>';
    }
    
    const primary = phones[0];
    const count = phones.length;
    
    if (count === 1) {
        return escapeHtml(primary.phone || '');
    } else {
        return escapeHtml(primary.phone || '') + ` <span class="text-xs text-neutral-500">(+${count - 1} more)</span>`;
    }
}

function escapeHtml(str) {
    if (!str && str !== 0) return '';
    return String(str)
        .replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/"/g, '&quot;')
        .replace(/'/g, '&#39;');
}

// Enhanced alert function
function showAlert(message, type = 'info') {
    if (window.alerts && typeof window.alerts.show === 'function') {
        window.alerts.show(message, type);
        return;
    }
    // Fallback
    alert(String(message));
}

// Modal management functions
function showAddCustomerModal() {
    isEditing = false;
    editingCustomerId = null;
    document.getElementById('customerModalLabel').textContent = 'Add New Customer';
    document.getElementById('deleteCustomerBtn').classList.add('hidden');
    clearCustomerForm();
    document.getElementById('customerModal').classList.remove('hidden');
}

function closeCustomerModal() {
    document.getElementById('customerModal').classList.add('hidden');
}

function showEditCustomerModal() {
    document.getElementById('customerModalLabel').textContent = 'Edit Customer';
    document.getElementById('deleteCustomerBtn').classList.remove('hidden');
    document.getElementById('customerModal').classList.remove('hidden');
}

// Customer detail functions
async function viewCustomer(customerId) {
    try {
        // URL encode the customer ID to handle special characters like backslashes and spaces
        const encodedCustomerId = encodeURIComponent(customerId);
        const response = await window.http.wrappedFetch(`/api/customers/${encodedCustomerId}`);
        if (!response.ok) throw new Error('Failed to load customer details');
        
        const customer = await response.json();
        showCustomerDetailsModal(customer);
        
    } catch (error) {
        console.error('Error loading customer:', error);
        showAlert(`Error loading customer: ${error.message}`, 'danger');
    }
}

function showCustomerDetailsModal(customer) {
    // Create modal content
    const modalContent = `
        <div class="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50 p-4" id="customerDetailsModal">
            <div class="bg-white dark:bg-neutral-800 rounded-xl shadow-xl max-w-5xl w-full max-h-[85vh] overflow-hidden">
                <div class="flex items-center justify-between px-6 py-4 border-b border-neutral-200 dark:border-neutral-700">
                    <h2 class="text-xl font-semibold text-neutral-900 dark:text-neutral-100">Customer Details</h2>
                    <button onclick="closeCustomerDetailsModal()" class="text-neutral-400 hover:text-neutral-600 dark:text-neutral-500 dark:hover:text-neutral-300 transition-colors">
                        <i class="fa-solid fa-xmark text-xl"></i>
                    </button>
                </div>
                <div class="px-8 py-6 max-h-[70vh] overflow-y-auto">
                    <!-- Customer Header -->
                    <div class="mb-8 pb-6 border-b border-neutral-200 dark:border-neutral-700">
                        <div class="flex items-center justify-between">
                            <div>
                                <h1 class="text-2xl font-bold text-neutral-900 dark:text-neutral-100 mb-2">${escapeHtml(formatFullName(customer))}</h1>
                                <div class="flex items-center space-x-4">
                                    <span class="inline-flex items-center px-3 py-1 rounded-lg text-sm font-mono bg-neutral-100 dark:bg-neutral-800 text-neutral-700 dark:text-neutral-300 border">${escapeHtml(customer.id || '')}</span>
                                    ${customer.group ? `<span class="inline-flex items-center px-3 py-1 rounded-lg text-sm font-medium bg-blue-100 dark:bg-blue-900/30 text-blue-800 dark:text-blue-200 border border-blue-200 dark:border-blue-700">${escapeHtml(customer.group)}</span>` : ''}
                                    ${customer.title ? `<span class="text-neutral-600 dark:text-neutral-400">${escapeHtml(customer.title)}</span>` : ''}
                                </div>
                            </div>
                        </div>
                    </div>
                    
                    <!-- Main Content Grid -->
                    <div class="grid grid-cols-1 lg:grid-cols-3 gap-8">
                        <!-- Contact Information (Left Column) -->
                        <div class="lg:col-span-1">
                            <div class="bg-neutral-50 dark:bg-neutral-800/50 rounded-lg p-6 border border-neutral-200 dark:border-neutral-700">
                                <h3 class="text-lg font-semibold text-neutral-900 dark:text-neutral-100 mb-4 flex items-center">
                                    <i class="fa-solid fa-address-card mr-2 text-blue-600 dark:text-blue-400"></i>
                                    Contact Details
                                </h3>
                                <div class="space-y-4">
                                    ${customer.email ? `
                                        <div class="flex items-center space-x-3">
                                            <i class="fa-solid fa-envelope text-neutral-500 w-4"></i>
                                            <a href="mailto:${encodeURIComponent(customer.email)}" class="text-blue-600 dark:text-blue-400 hover:text-blue-800 dark:hover:text-blue-300 underline break-all">${escapeHtml(customer.email)}</a>
                                        </div>
                                    ` : `
                                        <div class="flex items-center space-x-3">
                                            <i class="fa-solid fa-envelope text-neutral-400 w-4"></i>
                                            <span class="text-neutral-400">No email provided</span>
                                        </div>
                                    `}
                                    
                                    ${formatCustomerPhonesCard(customer.phone_numbers || [])}
                                </div>
                            </div>
                        </div>
                        
                        <!-- Address Information (Middle Column) -->
                        <div class="lg:col-span-1">
                            <div class="bg-neutral-50 dark:bg-neutral-800/50 rounded-lg p-6 border border-neutral-200 dark:border-neutral-700">
                                <h3 class="text-lg font-semibold text-neutral-900 dark:text-neutral-100 mb-4 flex items-center">
                                    <i class="fa-solid fa-map-marker-alt mr-2 text-green-600 dark:text-green-400"></i>
                                    Address
                                </h3>
                                ${formatCustomerAddressCard(customer)}
                            </div>
                        </div>
                        
                        <!-- Additional Information (Right Column) -->
                        <div class="lg:col-span-1">
                            <div class="bg-neutral-50 dark:bg-neutral-800/50 rounded-lg p-6 border border-neutral-200 dark:border-neutral-700">
                                <h3 class="text-lg font-semibold text-neutral-900 dark:text-neutral-100 mb-4 flex items-center">
                                    <i class="fa-solid fa-info-circle mr-2 text-purple-600 dark:text-purple-400"></i>
                                    Additional Info
                                </h3>
                                <div class="space-y-3">
                                    ${customer.dob ? `
                                        <div class="flex justify-between">
                                            <span class="text-neutral-600 dark:text-neutral-400">Date of Birth:</span>
                                            <span class="text-neutral-900 dark:text-neutral-100">${escapeHtml(customer.dob)}</span>
                                        </div>
                                    ` : ''}
                                    ${customer.legal_status ? `
                                        <div class="flex justify-between">
                                            <span class="text-neutral-600 dark:text-neutral-400">Legal Status:</span>
                                            <span class="text-neutral-900 dark:text-neutral-100">${escapeHtml(customer.legal_status)}</span>
                                        </div>
                                    ` : ''}
                                    ${customer.ss_number ? `
                                        <div class="flex justify-between">
                                            <span class="text-neutral-600 dark:text-neutral-400">SSN:</span>
                                            <span class="font-mono text-neutral-900 dark:text-neutral-100">${escapeHtml(customer.ss_number)}</span>
                                        </div>
                                    ` : ''}
                                    ${!customer.dob && !customer.legal_status && !customer.ss_number ? `
                                        <div class="text-center text-neutral-400 py-4">
                                            <i class="fa-solid fa-info-circle mb-2 text-lg"></i>
                                            <p>No additional information available</p>
                                        </div>
                                    ` : ''}
                                </div>
                            </div>
                        </div>
                    </div>
                    
                    <!-- Notes Section (Full Width) -->
                    ${customer.memo ? `
                        <div class="mt-8">
                            <div class="bg-neutral-50 dark:bg-neutral-800/50 rounded-lg p-6 border border-neutral-200 dark:border-neutral-700">
                                <h3 class="text-lg font-semibold text-neutral-900 dark:text-neutral-100 mb-4 flex items-center">
                                    <i class="fa-solid fa-sticky-note mr-2 text-orange-600 dark:text-orange-400"></i>
                                    Notes
                                </h3>
                                <div class="text-neutral-700 dark:text-neutral-300 leading-relaxed whitespace-pre-wrap bg-white dark:bg-neutral-800 p-4 rounded border border-neutral-200 dark:border-neutral-600">${escapeHtml(customer.memo)}</div>
                            </div>
                        </div>
                    ` : ''}
                </div>
                <div class="flex items-center justify-end gap-4 px-8 py-6 border-t border-neutral-200 dark:border-neutral-700 bg-neutral-50 dark:bg-neutral-800/50">
                    <button onclick="closeCustomerDetailsModal()" class="px-6 py-3 bg-neutral-200 dark:bg-neutral-700 text-neutral-700 dark:text-neutral-300 hover:bg-neutral-300 dark:hover:bg-neutral-600 rounded-lg transition-colors duration-200 font-medium">
                        Close
                    </button>
                    <button onclick="closeCustomerDetailsModal(); editCustomer('${escapeHtml(customer.id)}')" class="px-6 py-3 bg-blue-600 text-white hover:bg-blue-700 rounded-lg transition-colors duration-200 font-medium shadow-sm">
                        <i class="fa-solid fa-pencil mr-2"></i>Edit Customer
                    </button>
                </div>
            </div>
        </div>
    `;
    
    // Add modal to body
    document.body.insertAdjacentHTML('beforeend', modalContent);
}

function closeCustomerDetailsModal() {
    const modal = document.getElementById('customerDetailsModal');
    if (modal) {
        modal.remove();
    }
}

function formatCustomerAddress(customer) {
    const parts = [];
    if (customer.a1) parts.push(`<div>${escapeHtml(customer.a1)}</div>`);
    if (customer.a2) parts.push(`<div>${escapeHtml(customer.a2)}</div>`);
    if (customer.a3) parts.push(`<div>${escapeHtml(customer.a3)}</div>`);
    
    const cityState = formatCityState(customer);
    if (cityState !== '-') {
        parts.push(`<div>${escapeHtml(cityState)}</div>`);
    }
    
    if (customer.zip) {
        parts.push(`<div>${escapeHtml(customer.zip)}</div>`);
    }
    
    return parts.length > 0 ? `<div class="mb-2"><span class="font-medium">Address:</span><div class="ml-4">${parts.join('')}</div></div>` : '';
}

function formatCustomerPhones(phones) {
    if (!phones || phones.length === 0) {
        return '<div><span class="font-medium">Phone:</span> <span class="text-neutral-400">None</span></div>';
    }
    
    const phoneList = phones.map(phone => 
        `<div class="ml-4">${phone.location ? `<span class="text-xs text-neutral-500">${escapeHtml(phone.location)}:</span> ` : ''}${escapeHtml(phone.phone)}</div>`
    ).join('');
    
    return `<div class="mb-2"><span class="font-medium">Phone${phones.length > 1 ? 's' : ''}:</span>${phoneList}</div>`;
}

function formatCustomerAddressLarge(customer) {
    const addressParts = [];
    if (customer.a1) addressParts.push(escapeHtml(customer.a1));
    if (customer.a2) addressParts.push(escapeHtml(customer.a2));
    if (customer.a3) addressParts.push(escapeHtml(customer.a3));
    
    const cityState = formatCityState(customer);
    if (cityState !== '-') addressParts.push(escapeHtml(cityState));
    if (customer.zip) addressParts.push(escapeHtml(customer.zip));
    
    if (addressParts.length === 0) {
        return '<div class="flex items-start"><span class="font-semibold text-neutral-700 dark:text-neutral-300 w-20 flex-shrink-0">Address:</span> <span class="text-neutral-400">Not provided</span></div>';
    }
    
    return `<div class="flex items-start"><span class="font-semibold text-neutral-700 dark:text-neutral-300 w-20 flex-shrink-0">Address:</span> <div class="space-y-1">${addressParts.map(part => `<div>${part}</div>`).join('')}</div></div>`;
}

function formatCustomerPhonesLarge(phones) {
    if (!phones || phones.length === 0) {
        return '<div class="flex items-start"><span class="font-semibold text-neutral-700 dark:text-neutral-300 w-20 flex-shrink-0">Phone:</span> <span class="text-neutral-400">None</span></div>';
    }
    
    const phoneList = phones.map(phone => 
        `<div class="flex items-center space-x-2">
            <span class="font-mono bg-neutral-100 dark:bg-neutral-700 px-2 py-1 rounded text-sm">${escapeHtml(phone.phone)}</span>
            ${phone.location ? `<span class="text-xs px-2 py-1 bg-blue-100 dark:bg-blue-900/30 text-blue-700 dark:text-blue-300 rounded">${escapeHtml(phone.location)}</span>` : ''}
        </div>`
    ).join('');
    
    return `<div class="flex items-start"><span class="font-semibold text-neutral-700 dark:text-neutral-300 w-20 flex-shrink-0">Phone${phones.length > 1 ? 's' : ''}:</span> <div class="space-y-2">${phoneList}</div></div>`;
}

function formatCustomerPhonesCard(phones) {
    if (!phones || phones.length === 0) {
        return `
            <div class="flex items-center space-x-3">
                <i class="fa-solid fa-phone text-neutral-400 w-4"></i>
                <span class="text-neutral-400">No phone numbers</span>
            </div>
        `;
    }
    
    return phones.map(phone => `
        <div class="flex items-center space-x-3">
            <i class="fa-solid fa-phone text-neutral-500 w-4"></i>
            <div class="flex items-center space-x-2">
                <span class="font-mono text-neutral-900 dark:text-neutral-100">${escapeHtml(phone.phone)}</span>
                ${phone.location ? `<span class="text-xs px-2 py-1 bg-blue-100 dark:bg-blue-900/30 text-blue-700 dark:text-blue-300 rounded-full">${escapeHtml(phone.location)}</span>` : ''}
            </div>
        </div>
    `).join('');
}

function formatCustomerAddressCard(customer) {
    const addressParts = [];
    if (customer.a1) addressParts.push(escapeHtml(customer.a1));
    if (customer.a2) addressParts.push(escapeHtml(customer.a2));
    if (customer.a3) addressParts.push(escapeHtml(customer.a3));
    
    const cityState = formatCityState(customer);
    if (cityState !== '-') addressParts.push(escapeHtml(cityState));
    if (customer.zip) addressParts.push(escapeHtml(customer.zip));
    
    if (addressParts.length === 0) {
        return `
            <div class="text-center text-neutral-400 py-4">
                <i class="fa-solid fa-map-marker-alt mb-2 text-lg"></i>
                <p>No address provided</p>
            </div>
        `;
    }
    
    return `
        <div class="space-y-2">
            ${addressParts.map(part => `<div class="text-neutral-700 dark:text-neutral-300">${part}</div>`).join('')}
        </div>
    `;
}

async function editCustomer(customerId) {
    try {
        // URL encode the customer ID to handle special characters like backslashes and spaces
        const encodedCustomerId = encodeURIComponent(customerId);
        const response = await window.http.wrappedFetch(`/api/customers/${encodedCustomerId}`);
        if (!response.ok) throw new Error('Failed to load customer details');
        
        const customer = await response.json();
        populateEditForm(customer);
        showEditCustomerModal();
        
    } catch (error) {
        console.error('Error loading customer for edit:', error);
        showAlert(`Error loading customer: ${error.message}`, 'danger');
    }
}

function populateEditForm(customer) {
    isEditing = true;
    editingCustomerId = customer.id;
    
    // Populate form fields
    document.getElementById('customerId').value = customer.id || '';
    document.getElementById('last').value = customer.last || '';
    document.getElementById('first').value = customer.first || '';
    document.getElementById('middle').value = customer.middle || '';
    document.getElementById('prefix').value = customer.prefix || '';
    document.getElementById('suffix').value = customer.suffix || '';
    document.getElementById('title').value = customer.title || '';
    document.getElementById('group').value = customer.group || '';
    document.getElementById('a1').value = customer.a1 || '';
    document.getElementById('a2').value = customer.a2 || '';
    document.getElementById('a3').value = customer.a3 || '';
    document.getElementById('city').value = customer.city || '';
    document.getElementById('abrev').value = customer.abrev || '';
    document.getElementById('zip').value = customer.zip || '';
    document.getElementById('email').value = customer.email || '';
    document.getElementById('dob').value = customer.dob || '';
    document.getElementById('ss_number').value = customer.ss_number || '';
    document.getElementById('legal_status').value = customer.legal_status || '';
    document.getElementById('memo').value = customer.memo || '';
    
    // Populate phone numbers
    populatePhoneNumbers(customer.phone_numbers || []);
    
    // Make customer ID readonly for editing
    document.getElementById('customerId').readOnly = true;
}

async function saveCustomer() {
    try {
        // Gather form data
        const customerData = {
            last: document.getElementById('last').value,
            first: document.getElementById('first').value || null,
            middle: document.getElementById('middle').value || null,
            prefix: document.getElementById('prefix').value || null,
            suffix: document.getElementById('suffix').value || null,
            title: document.getElementById('title').value || null,
            group: document.getElementById('group').value || null,
            a1: document.getElementById('a1').value || null,
            a2: document.getElementById('a2').value || null,
            a3: document.getElementById('a3').value || null,
            city: document.getElementById('city').value || null,
            abrev: document.getElementById('abrev').value || null,
            zip: document.getElementById('zip').value || null,
            email: document.getElementById('email').value || null,
            dob: document.getElementById('dob').value || null,
            ss_number: document.getElementById('ss_number').value || null,
            legal_status: document.getElementById('legal_status').value || null,
            memo: document.getElementById('memo').value || null
        };

        // Validate required fields
        if (!customerData.last) {
            showAlert('Last name/Company is required', 'danger');
            return;
        }

        // Double confirm for edits
        if (isEditing) {
            const confirmMessage = `Are you sure you want to update customer "${customerData.last}"? This will permanently modify the customer record.`;
            const firstConfirm = confirm(confirmMessage);
            
            if (!firstConfirm) {
                return; // User cancelled
            }
            
            // Second confirmation
            const secondConfirm = confirm('Please confirm again: Do you really want to save these changes? This action cannot be undone.');
            
            if (!secondConfirm) {
                return; // User cancelled on second confirmation
            }
        }

        let response;
        if (isEditing) {
            // Update existing customer
            const encodedCustomerId = encodeURIComponent(editingCustomerId);
            response = await window.http.wrappedFetch(`/api/customers/${encodedCustomerId}`, {
                method: 'PUT',
                body: JSON.stringify(customerData)
            });
        } else {
            // Create new customer
            customerData.id = document.getElementById('customerId').value;
            if (!customerData.id) {
                showAlert('Customer ID is required', 'danger');
                return;
            }
            
            response = await window.http.wrappedFetch('/api/customers/', {
                method: 'POST',
                body: JSON.stringify(customerData)
            });
        }

        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Failed to save customer');
        }

        showAlert(isEditing ? 'Customer updated successfully!' : 'Customer created successfully!', 'success');
        closeCustomerModal();
        loadCustomers(); // Refresh the customer list
        
    } catch (error) {
        console.error('Error saving customer:', error);
        showAlert(`Error saving customer: ${error.message}`, 'danger');
    }
}

function deleteCustomer() {
    showAlert('Delete customer feature coming soon...', 'info');
}

function validateCustomerId() {
    // Placeholder
}

function populatePhoneNumbers(phones) {
    const phoneList = document.getElementById('phoneList');
    phoneList.innerHTML = '';
    
    phones.forEach((phone, index) => {
        const phoneDiv = document.createElement('div');
        phoneDiv.className = 'flex items-center space-x-2';
        phoneDiv.innerHTML = `
            <div class="flex-1">
                <input type="text" 
                       value="${escapeHtml(phone.location || '')}" 
                       placeholder="Location (e.g., Home, Office)" 
                       class="w-full px-3 py-2 bg-white dark:bg-neutral-800 border border-neutral-300 dark:border-neutral-600 rounded-lg text-neutral-900 dark:text-neutral-100 text-sm"
                       data-phone-index="${index}" 
                       data-phone-field="location">
            </div>
            <div class="flex-1">
                <input type="text" 
                       value="${escapeHtml(phone.phone || '')}" 
                       placeholder="Phone number" 
                       class="w-full px-3 py-2 bg-white dark:bg-neutral-800 border border-neutral-300 dark:border-neutral-600 rounded-lg text-neutral-900 dark:text-neutral-100 text-sm"
                       data-phone-index="${index}" 
                       data-phone-field="phone">
            </div>
            <button type="button" onclick="removePhoneNumber(${index})" class="px-2 py-2 bg-danger-600 text-white hover:bg-danger-700 rounded-lg text-sm transition-colors">
                <i class="fa-solid fa-trash"></i>
            </button>
        `;
        phoneList.appendChild(phoneDiv);
    });
}

function clearCustomerForm() {
    isEditing = false;
    editingCustomerId = null;
    
    // Clear all form fields
    document.getElementById('customerId').value = '';
    document.getElementById('customerId').readOnly = false;
    document.getElementById('last').value = '';
    document.getElementById('first').value = '';
    document.getElementById('middle').value = '';
    document.getElementById('prefix').value = '';
    document.getElementById('suffix').value = '';
    document.getElementById('title').value = '';
    document.getElementById('group').value = '';
    document.getElementById('a1').value = '';
    document.getElementById('a2').value = '';
    document.getElementById('a3').value = '';
    document.getElementById('city').value = '';
    document.getElementById('abrev').value = '';
    document.getElementById('zip').value = '';
    document.getElementById('email').value = '';
    document.getElementById('dob').value = '';
    document.getElementById('ss_number').value = '';
    document.getElementById('legal_status').value = '';
    document.getElementById('memo').value = '';
    
    // Clear phone numbers
    document.getElementById('phoneList').innerHTML = '';
}

function removePhoneNumber(index) {
    const phoneList = document.getElementById('phoneList');
    const phoneInputs = phoneList.children;
    if (phoneInputs[index]) {
        phoneInputs[index].remove();
        // Re-index remaining phone inputs
        Array.from(phoneInputs).forEach((phoneDiv, newIndex) => {
            const inputs = phoneDiv.querySelectorAll('input');
            inputs.forEach(input => {
                input.setAttribute('data-phone-index', newIndex);
            });
            const button = phoneDiv.querySelector('button');
            if (button) {
                button.setAttribute('onclick', `removePhoneNumber(${newIndex})`);
            }
        });
    }
}

function addPhoneNumber() {
    const phoneList = document.getElementById('phoneList');
    const currentCount = phoneList.children.length;
    
    const phoneDiv = document.createElement('div');
    phoneDiv.className = 'flex items-center space-x-2';
    phoneDiv.innerHTML = `
        <div class="flex-1">
            <input type="text" 
                   value="" 
                   placeholder="Location (e.g., Home, Office)" 
                   class="w-full px-3 py-2 bg-white dark:bg-neutral-800 border border-neutral-300 dark:border-neutral-600 rounded-lg text-neutral-900 dark:text-neutral-100 text-sm"
                   data-phone-index="${currentCount}" 
                   data-phone-field="location">
        </div>
        <div class="flex-1">
            <input type="text" 
                   value="" 
                   placeholder="Phone number" 
                   class="w-full px-3 py-2 bg-white dark:bg-neutral-800 border border-neutral-300 dark:border-neutral-600 rounded-lg text-neutral-900 dark:text-neutral-100 text-sm"
                   data-phone-index="${currentCount}" 
                   data-phone-field="phone">
        </div>
        <button type="button" onclick="removePhoneNumber(${currentCount})" class="px-2 py-2 bg-danger-600 text-white hover:bg-danger-700 rounded-lg text-sm transition-colors">
            <i class="fa-solid fa-trash"></i>
        </button>
    `;
    phoneList.appendChild(phoneDiv);
}

// Make functions globally available
window.showAddCustomerModal = showAddCustomerModal;
window.closeCustomerModal = closeCustomerModal;
window.showEditCustomerModal = showEditCustomerModal;
window.displayCustomers = displayCustomers;
window.showAlert = showAlert;
window.editCustomer = editCustomer;
window.viewCustomer = viewCustomer;
window.saveCustomer = saveCustomer;
window.deleteCustomer = deleteCustomer;
window.validateCustomerId = validateCustomerId;
window.closeCustomerDetailsModal = closeCustomerDetailsModal;
window.populateEditForm = populateEditForm;
window.populatePhoneNumbers = populatePhoneNumbers;
window.clearCustomerForm = clearCustomerForm;
window.addPhoneNumber = addPhoneNumber;
window.removePhoneNumber = removePhoneNumber;