{% extends "base.html" %}

{% block title %}Customers (Rolodex) - Delphi Database{% endblock %}

{% block content %}
<div class="container-fluid">
    <div class="row">
        <div class="col-12">
            <div class="d-flex justify-content-between align-items-center mb-3">
                <h2><i class="bi bi-person-rolodex"></i> Customers (Rolodex)</h2>
                <div>
                    <button class="btn btn-success" id="addCustomerBtn">
                        <i class="bi bi-plus-circle"></i> New Customer (Ctrl+N)
                    </button>
                    <button class="btn btn-info" id="statsBtn">
                        <i class="bi bi-graph-up"></i> Statistics
                    </button>
                </div>
            </div>

            <!-- Search and Filter Panel -->
            <div class="card customer-search-panel mb-3">
                <div class="card-body">
                    <div class="row g-3">
                        <div class="col-md-4">
                            <label for="searchInput" class="form-label">Search Customers</label>
                            <div class="input-group">
                                <input type="text" class="form-control" id="searchInput" placeholder="Name, ID, City, Email...">
                                <button class="btn btn-outline-secondary" type="button" id="searchBtn">
                                    <i class="bi bi-search"></i>
                                </button>
                            </div>
                        </div>
                        <div class="col-md-3">
                            <label for="groupFilter" class="form-label">Group Filter</label>
                            <select class="form-select" id="groupFilter">
                                <option value="">All Groups</option>
                            </select>
                        </div>
                        <div class="col-md-2">
                            <label for="stateFilter" class="form-label">State Filter</label>
                            <select class="form-select" id="stateFilter">
                                <option value="">All States</option>
                            </select>
                        </div>
                        <div class="col-md-3">
                            <label for="phoneSearch" class="form-label">Phone Search</label>
                            <div class="input-group">
                                <input type="text" class="form-control" id="phoneSearch" placeholder="Phone number...">
                                <button class="btn btn-outline-secondary" type="button" id="phoneSearchBtn">
                                    <i class="bi bi-telephone"></i>
                                </button>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <!-- Customer List -->
            <div class="card customer-table-container">
                <div class="card-body">
                    <div class="table-responsive">
                        <table class="table table-hover" id="customersTable">
                            <thead>
                                <tr>
                                    <th>ID</th>
                                    <th>Name</th>
                                    <th>Group</th>
                                    <th>City, State</th>
                                    <th>Phone</th>
                                    <th>Email</th>
                                    <th>Actions</th>
                                </tr>
                            </thead>
                            <tbody id="customersTableBody">
                                <!-- Customer rows will be populated here -->
                            </tbody>
                        </table>
                    </div>
                    
                    <!-- Pagination -->
                    <nav aria-label="Customer pagination">
                        <ul class="pagination justify-content-center" id="pagination">
                        </ul>
                    </nav>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- Customer Modal -->
<div class="modal fade customer-modal" id="customerModal" tabindex="-1" aria-labelledby="customerModalLabel" aria-hidden="true">
    <div class="modal-dialog modal-xl">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="customerModalLabel">Customer Details</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <div class="modal-body">
                <form id="customerForm">
                    <div class="row g-3">
                        <!-- Customer ID and Basic Info -->
                        <div class="col-md-6">
                            <div class="card customer-form-section">
                                <div class="card-header">
                                    <h6 class="mb-0">Basic Information</h6>
                                </div>
                                <div class="card-body">
                                    <div class="mb-3">
                                        <label for="customerId" class="form-label">Customer ID *</label>
                                        <input type="text" class="form-control" id="customerId" name="id" required>
                                    </div>
                                    <div class="row">
                                        <div class="col-md-6">
                                            <label for="prefix" class="form-label">Prefix</label>
                                            <input type="text" class="form-control" id="prefix" name="prefix" placeholder="Mr., Ms., Dr.">
                                        </div>
                                        <div class="col-md-6">
                                            <label for="suffix" class="form-label">Suffix</label>
                                            <input type="text" class="form-control" id="suffix" name="suffix" placeholder="Jr., Sr., M.D.">
                                        </div>
                                    </div>
                                    <div class="mb-3">
                                        <label for="first" class="form-label">First Name</label>
                                        <input type="text" class="form-control" id="first" name="first">
                                    </div>
                                    <div class="mb-3">
                                        <label for="middle" class="form-label">Middle Name</label>
                                        <input type="text" class="form-control" id="middle" name="middle">
                                    </div>
                                    <div class="mb-3">
                                        <label for="last" class="form-label">Last Name / Company *</label>
                                        <input type="text" class="form-control" id="last" name="last" required>
                                    </div>
                                    <div class="row">
                                        <div class="col-md-6">
                                            <label for="title" class="form-label">Title</label>
                                            <input type="text" class="form-control" id="title" name="title" placeholder="President, Attorney">
                                        </div>
                                        <div class="col-md-6">
                                            <label for="group" class="form-label">Group</label>
                                            <input type="text" class="form-control" id="group" name="group" placeholder="Client, Personal">
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>

                        <!-- Address Information -->
                        <div class="col-md-6">
                            <div class="card customer-form-section">
                                <div class="card-header">
                                    <h6 class="mb-0">Address Information</h6>
                                </div>
                                <div class="card-body">
                                    <div class="mb-3">
                                        <label for="a1" class="form-label">Address Line 1</label>
                                        <input type="text" class="form-control" id="a1" name="a1">
                                    </div>
                                    <div class="mb-3">
                                        <label for="a2" class="form-label">Address Line 2</label>
                                        <input type="text" class="form-control" id="a2" name="a2">
                                    </div>
                                    <div class="mb-3">
                                        <label for="a3" class="form-label">Address Line 3</label>
                                        <input type="text" class="form-control" id="a3" name="a3">
                                    </div>
                                    <div class="row">
                                        <div class="col-md-6">
                                            <label for="city" class="form-label">City</label>
                                            <input type="text" class="form-control" id="city" name="city">
                                        </div>
                                        <div class="col-md-3">
                                            <label for="abrev" class="form-label">State</label>
                                            <input type="text" class="form-control" id="abrev" name="abrev" placeholder="TX" maxlength="2">
                                        </div>
                                        <div class="col-md-3">
                                            <label for="zip" class="form-label">ZIP Code</label>
                                            <input type="text" class="form-control" id="zip" name="zip">
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>

                        <!-- Contact & Legal Info -->
                        <div class="col-12">
                            <div class="card customer-form-section">
                                <div class="card-header">
                                    <h6 class="mb-0">Contact & Legal Information</h6>
                                </div>
                                <div class="card-body">
                                    <div class="row">
                                        <div class="col-md-4">
                                            <label for="email" class="form-label">Email</label>
                                            <input type="email" class="form-control" id="email" name="email">
                                        </div>
                                        <div class="col-md-3">
                                            <label for="dob" class="form-label">Date of Birth</label>
                                            <input type="date" class="form-control" id="dob" name="dob">
                                        </div>
                                        <div class="col-md-3">
                                            <label for="ss_number" class="form-label">Social Security #</label>
                                            <input type="text" class="form-control" id="ss_number" name="ss_number" placeholder="###-##-####">
                                        </div>
                                        <div class="col-md-2">
                                            <label for="legal_status" class="form-label">Legal Status</label>
                                            <input type="text" class="form-control" id="legal_status" name="legal_status" placeholder="Petitioner">
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>

                        <!-- Phone Numbers -->
                        <div class="col-12">
                            <div class="card customer-form-section">
                                <div class="card-header d-flex justify-content-between align-items-center">
                                    <h6 class="mb-0">Phone Numbers</h6>
                                    <button type="button" class="btn btn-sm btn-success" id="addPhoneBtn">
                                        <i class="bi bi-plus"></i> Add Phone
                                    </button>
                                </div>
                                <div class="card-body">
                                    <div id="phoneNumbers">
                                        <!-- Phone numbers will be populated here -->
                                    </div>
                                </div>
                            </div>
                        </div>

                        <!-- Memo -->
                        <div class="col-12">
                            <div class="card customer-form-section">
                                <div class="card-header">
                                    <h6 class="mb-0">Memo / Notes (Alt+M)</h6>
                                </div>
                                <div class="card-body">
                                    <textarea class="form-control" id="memo" name="memo" rows="4" placeholder="Enter notes and comments here..."></textarea>
                                </div>
                            </div>
                        </div>
                    </div>
                </form>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel (Esc)</button>
                <button type="button" class="btn btn-danger delete-customer-btn" id="deleteCustomerBtn">
                    <i class="bi bi-trash"></i> Delete (Del)
                </button>
                <button type="button" class="btn btn-primary" id="saveCustomerBtn">
                    <i class="bi bi-check-circle"></i> Save (Ctrl+S)
                </button>
            </div>
        </div>
    </div>
</div>

<!-- Statistics Modal -->
<div class="modal fade" id="statsModal" tabindex="-1" aria-labelledby="statsModalLabel" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="statsModalLabel">Customer Database Statistics</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <div class="modal-body" id="statsContent">
                <!-- Statistics will be loaded here -->
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
            </div>
        </div>
    </div>
</div>

<script>
// Customer management functionality
let currentPage = 0;
let currentSearch = '';
let isEditing = false;
let editingCustomerId = null;

// Helper function for authenticated API calls
function getAuthHeaders() {
    const token = localStorage.getItem('auth_token');
    return {
        'Authorization': `Bearer ${token}`,
        'Content-Type': 'application/json'
    };
}

// Initialize on page load
document.addEventListener('DOMContentLoaded', function() {
    // Check authentication first
    const token = localStorage.getItem('auth_token');
    if (!token) {
        window.location.href = '/login';
        return;
    }
    
    loadCustomers();
    loadGroups();
    loadStates();
    setupEventListeners();
});

function setupEventListeners() {
    // Search functionality
    document.getElementById('searchBtn').addEventListener('click', performSearch);
    document.getElementById('searchInput').addEventListener('keypress', function(e) {
        if (e.key === 'Enter') performSearch();
    });
    
    // Phone search
    document.getElementById('phoneSearchBtn').addEventListener('click', performPhoneSearch);
    document.getElementById('phoneSearch').addEventListener('keypress', function(e) {
        if (e.key === 'Enter') performPhoneSearch();
    });
    
    // Modal buttons
    document.getElementById('addCustomerBtn').addEventListener('click', showAddCustomerModal);
    document.getElementById('saveCustomerBtn').addEventListener('click', saveCustomer);
    document.getElementById('deleteCustomerBtn').addEventListener('click', deleteCustomer);
    document.getElementById('addPhoneBtn').addEventListener('click', addPhoneField);
    document.getElementById('statsBtn').addEventListener('click', showStats);
    
    // Form validation
    document.getElementById('customerId').addEventListener('blur', validateCustomerId);
}

async function loadCustomers(page = 0, search = '') {
    try {
        const params = new URLSearchParams({
            skip: page * 50,
            limit: 50
        });
        
        if (search) params.append('search', search);
        
        const response = await fetch(`/api/customers/?${params}`, {
            headers: getAuthHeaders()
        });
        
        if (!response.ok) throw new Error('Failed to load customers');
        
        const customers = await response.json();
        displayCustomers(customers);
        
    } catch (error) {
        console.error('Error loading customers:', error);
        showAlert('Error loading customers: ' + error.message, 'danger');
    }
}

function displayCustomers(customers) {
    const tbody = document.getElementById('customersTableBody');
    tbody.innerHTML = '';
    
    customers.forEach(customer => {
        const row = document.createElement('tr');
        row.innerHTML = `
            <td>${customer.id}</td>
            <td>${formatName(customer)}</td>
            <td>${customer.group || ''}</td>
            <td>${formatLocation(customer)}</td>
            <td>${formatPhones(customer.phone_numbers)}</td>
            <td>${customer.email || ''}</td>
            <td>
                <button class="btn btn-sm btn-primary" onclick="editCustomer('${customer.id}')">
                    <i class="bi bi-pencil"></i> Edit
                </button>
                <button class="btn btn-sm btn-info" onclick="viewCustomer('${customer.id}')">
                    <i class="bi bi-eye"></i> View
                </button>
            </td>
        `;
        tbody.appendChild(row);
    });
}

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

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

function formatPhones(phones) {
    if (!phones || phones.length === 0) return '';
    return phones.map(p => `${p.location || 'Phone'}: ${p.phone}`).join('<br>');
}

async function loadGroups() {
    try {
        const response = await fetch('/api/customers/groups', {
            headers: getAuthHeaders()
        });
        
        if (response.ok) {
            const groups = await response.json();
            const select = document.getElementById('groupFilter');
            groups.forEach(g => {
                const option = document.createElement('option');
                option.value = g.group;
                option.textContent = g.group;
                select.appendChild(option);
            });
        }
    } catch (error) {
        console.error('Error loading groups:', error);
    }
}

async function loadStates() {
    try {
        const response = await fetch('/api/customers/states', {
            headers: getAuthHeaders()
        });
        
        if (response.ok) {
            const states = await response.json();
            const select = document.getElementById('stateFilter');
            states.forEach(s => {
                const option = document.createElement('option');
                option.value = s.state;
                option.textContent = s.state;
                select.appendChild(option);
            });
        }
    } catch (error) {
        console.error('Error loading states:', error);
    }
}

function performSearch() {
    currentSearch = document.getElementById('searchInput').value;
    currentPage = 0;
    loadCustomers(currentPage, currentSearch);
}

async function performPhoneSearch() {
    const phone = document.getElementById('phoneSearch').value;
    if (!phone) return;
    
    try {
        const response = await fetch(`/api/customers/search/phone?phone=${encodeURIComponent(phone)}`, {
            headers: getAuthHeaders()
        });
        
        if (!response.ok) throw new Error('Phone search failed');
        
        const results = await response.json();
        displayPhoneSearchResults(results);
        
    } catch (error) {
        console.error('Phone search error:', error);
        showAlert('Phone search failed: ' + error.message, 'danger');
    }
}

function displayPhoneSearchResults(results) {
    const tbody = document.getElementById('customersTableBody');
    tbody.innerHTML = '';
    
    results.forEach(result => {
        const row = document.createElement('tr');
        row.innerHTML = `
            <td>${result.customer.id}</td>
            <td>${result.customer.name}</td>
            <td>-</td>
            <td>${result.customer.city}, ${result.customer.state}</td>
            <td><strong>${result.location}: ${result.phone}</strong></td>
            <td>-</td>
            <td>
                <button class="btn btn-sm btn-primary" onclick="editCustomer('${result.customer.id}')">
                    <i class="bi bi-pencil"></i> Edit
                </button>
            </td>
        `;
        tbody.appendChild(row);
    });
}

function showAddCustomerModal() {
    isEditing = false;
    editingCustomerId = null;
    document.getElementById('customerModalLabel').textContent = 'Add New Customer';
    document.getElementById('deleteCustomerBtn').classList.remove('show');
    clearCustomerForm();
    new bootstrap.Modal(document.getElementById('customerModal')).show();
}

async function editCustomer(customerId) {
    try {
        const response = await fetch(`/api/customers/${customerId}`, {
            headers: getAuthHeaders()
        });
        
        if (!response.ok) throw new Error('Failed to load customer');
        
        const customer = await response.json();
        populateCustomerForm(customer);
        
        isEditing = true;
        editingCustomerId = customerId;
        document.getElementById('customerModalLabel').textContent = 'Edit Customer';
        document.getElementById('deleteCustomerBtn').classList.add('show');
        document.getElementById('customerId').disabled = true;
        
        new bootstrap.Modal(document.getElementById('customerModal')).show();
        
    } catch (error) {
        console.error('Error loading customer:', error);
        showAlert('Error loading customer: ' + error.message, 'danger');
    }
}

function viewCustomer(customerId) {
    // Similar to editCustomer but make form read-only
    editCustomer(customerId);
    // TODO: Make form read-only for view mode
}

function populateCustomerForm(customer) {
    const form = document.getElementById('customerForm');
    const formData = new FormData(form);
    
    // Populate basic fields
    Object.keys(customer).forEach(key => {
        const input = form.querySelector(`[name="${key}"]`);
        if (input && customer[key] !== null) {
            if (input.type === 'date' && customer[key]) {
                input.value = customer[key];
            } else {
                input.value = customer[key] || '';
            }
        }
    });
    
    // Populate phone numbers
    populatePhoneNumbers(customer.phone_numbers || []);
}

function populatePhoneNumbers(phones) {
    const container = document.getElementById('phoneNumbers');
    container.innerHTML = '';
    
    phones.forEach((phone, index) => {
        addPhoneField(phone);
    });
    
    if (phones.length === 0) {
        addPhoneField();
    }
}

function addPhoneField(phone = null) {
    const container = document.getElementById('phoneNumbers');
    const phoneDiv = document.createElement('div');
    phoneDiv.className = 'row mb-2 phone-entry';
    
    phoneDiv.innerHTML = `
        <div class="col-md-4">
            <input type="text" class="form-control phone-location" placeholder="Location (Home, Office, Mobile)" value="${phone?.location || ''}">
        </div>
        <div class="col-md-6">
            <input type="text" class="form-control phone-number" placeholder="Phone Number" value="${phone?.phone || ''}">
        </div>
        <div class="col-md-2">
            <button type="button" class="btn btn-outline-danger btn-sm remove-phone">
                <i class="bi bi-dash"></i>
            </button>
        </div>
    `;
    
    // Add remove functionality
    phoneDiv.querySelector('.remove-phone').addEventListener('click', function() {
        phoneDiv.remove();
    });
    
    container.appendChild(phoneDiv);
}

async function saveCustomer() {
    const form = document.getElementById('customerForm');
    const formData = new FormData(form);
    
    const customerData = {};
    
    // Collect basic form data
    for (let [key, value] of formData.entries()) {
        if (value.trim() !== '') {
            customerData[key] = value.trim();
        }
    }
    
    // Validate required fields
    if (!customerData.id || !customerData.last) {
        showAlert('Customer ID and Last Name are required', 'danger');
        return;
    }
    
    try {
        const url = isEditing ? `/api/customers/${editingCustomerId}` : '/api/customers/';
        const method = isEditing ? 'PUT' : 'POST';
        
        const response = await fetch(url, {
            method: method,
            headers: getAuthHeaders(),
            body: JSON.stringify(customerData)
        });
        
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Failed to save customer');
        }
        
        const customer = await response.json();
        
        // Save phone numbers
        await savePhoneNumbers(customer.id);
        
        bootstrap.Modal.getInstance(document.getElementById('customerModal')).hide();
        showAlert(isEditing ? 'Customer updated successfully' : 'Customer created successfully', 'success');
        loadCustomers(currentPage, currentSearch);
        
    } catch (error) {
        console.error('Error saving customer:', error);
        showAlert('Error saving customer: ' + error.message, 'danger');
    }
}

async function savePhoneNumbers(customerId) {
    const phoneEntries = document.querySelectorAll('.phone-entry');
    
    // First, get existing phones to update/delete
    try {
        const response = await fetch(`/api/customers/${customerId}/phones`, {
            headers: getAuthHeaders()
        });
        
        if (response.ok) {
            const existingPhones = await response.json();
            // For simplicity, delete all existing phones and re-add
            // In production, you'd want to be more sophisticated about updates
            for (const phone of existingPhones) {
                await fetch(`/api/customers/${customerId}/phones/${phone.id}`, {
                    method: 'DELETE',
                    headers: getAuthHeaders()
                });
            }
        }
    } catch (error) {
        console.error('Error managing existing phones:', error);
    }
    
    // Add new phones
    for (const entry of phoneEntries) {
        const location = entry.querySelector('.phone-location').value.trim();
        const phone = entry.querySelector('.phone-number').value.trim();
        
        if (phone) {
            try {
                await fetch(`/api/customers/${customerId}/phones`, {
                    method: 'POST',
                    headers: getAuthHeaders(),
                    body: JSON.stringify({
                        location: location || null,
                        phone: phone
                    })
                });
            } catch (error) {
                console.error('Error saving phone:', error);
            }
        }
    }
}

async function deleteCustomer() {
    if (!confirm('Are you sure you want to delete this customer? This action cannot be undone.')) {
        return;
    }
    
    try {
        const response = await fetch(`/api/customers/${editingCustomerId}`, {
            method: 'DELETE',
            headers: getAuthHeaders()
        });
        
        if (!response.ok) throw new Error('Failed to delete customer');
        
        bootstrap.Modal.getInstance(document.getElementById('customerModal')).hide();
        showAlert('Customer deleted successfully', 'success');
        loadCustomers(currentPage, currentSearch);
        
    } catch (error) {
        console.error('Error deleting customer:', error);
        showAlert('Error deleting customer: ' + error.message, 'danger');
    }
}

async function validateCustomerId() {
    const id = document.getElementById('customerId').value;
    if (!id || isEditing) return;
    
    try {
        const response = await fetch(`/api/customers/${id}`, {
            headers: getAuthHeaders()
        });
        
        if (response.ok) {
            showAlert('Customer ID already exists', 'warning');
            document.getElementById('customerId').focus();
        }
    } catch (error) {
        // ID doesn't exist, which is good for new customers
    }
}

async function showStats() {
    try {
        const response = await fetch('/api/customers/stats', {
            headers: getAuthHeaders()
        });
        
        if (!response.ok) throw new Error('Failed to load statistics');
        
        const stats = await response.json();
        displayStats(stats);
        
    } catch (error) {
        console.error('Error loading stats:', error);
        showAlert('Error loading statistics: ' + error.message, 'danger');
    }
}

function displayStats(stats) {
    const content = document.getElementById('statsContent');
    content.innerHTML = `
        <div class="row">
            <div class="col-md-6">
                <h6>Database Overview</h6>
                <ul class="list-unstyled">
                    <li><strong>Total Customers:</strong> ${stats.total_customers}</li>
                    <li><strong>Phone Numbers:</strong> ${stats.total_phone_numbers}</li>
                    <li><strong>With Email:</strong> ${stats.customers_with_email}</li>
                </ul>
            </div>
            <div class="col-md-6">
                <h6>Group Breakdown</h6>
                <ul class="list-unstyled">
                    ${stats.group_breakdown.map(g => `<li><strong>${g.group}:</strong> ${g.count}</li>`).join('')}
                </ul>
            </div>
        </div>
    `;
    
    new bootstrap.Modal(document.getElementById('statsModal')).show();
}

function clearCustomerForm() {
    document.getElementById('customerForm').reset();
    document.getElementById('customerId').disabled = false;
    document.getElementById('phoneNumbers').innerHTML = '';
    addPhoneField();
}

function showAlert(message, type = 'info') {
    // Create and show Bootstrap alert
    const alertDiv = document.createElement('div');
    alertDiv.className = `alert alert-${type} alert-dismissible fade show`;
    alertDiv.innerHTML = `
        ${message}
        <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
    `;
    
    document.body.insertBefore(alertDiv, document.body.firstChild);
    
    // Auto-dismiss after 5 seconds
    setTimeout(() => {
        if (alertDiv.parentNode) {
            alertDiv.remove();
        }
    }, 5000);
}
</script>
{% endblock %}