// Initialize Lucide icons
document.addEventListener('DOMContentLoaded', function() {
    lucide.createIcons();
    initializeDate();
    initializeMockPatients();
});

// Sidebar Management
let sidebarCollapsed = false;

function toggleSidebar() {
    const sidebar = document.getElementById('sidebar');
    const overlay = document.getElementById('sidebarOverlay');
    
    sidebar.classList.toggle('-translate-x-full');
    overlay.classList.toggle('active');
}

function toggleSidebarDesktop() {
    const sidebar = document.getElementById('sidebar');
    const mainContent = document.querySelector('.flex-1.flex.flex-col');
    
    sidebarCollapsed = !sidebarCollapsed;
    
    if (sidebarCollapsed) {
        sidebar.classList.remove('w-72');
        sidebar.classList.add('w-20', 'collapsed');
    } else {
        sidebar.classList.remove('w-20', 'collapsed');
        sidebar.classList.add('w-72');
    }
    
    // Re-render icons to ensure proper sizing
    setTimeout(() => lucide.createIcons(), 300);
}

function toggleSubmenu() {
    const submenu = document.getElementById('appointmentsSubmenu');
    const icon = document.getElementById('submenuIcon');
    
    submenu.classList.toggle('expanded');
    
    if (submenu.classList.contains('expanded')) {
        icon.style.transform = 'rotate(180deg)';
    } else {
        icon.style.transform = 'rotate(0deg)';
    }
}

// Patient Type Management
let currentPatientType = 'new';

function setPatientType(type) {
    currentPatientType = type;
    const btnNew = document.getElementById('btnNewPatient');
    const btnExisting = document.getElementById('btnExistingPatient');
    const newForm = document.getElementById('newPatientForm');
    const existingForm = document.getElementById('existingPatientForm');
    
    if (type === 'new') {
        btnNew.classList.add('active');
        btnExisting.classList.remove('active');
        newForm.classList.remove('hidden');
        existingForm.classList.add('hidden');
    } else {
        btnNew.classList.remove('active');
        btnExisting.classList.add('active');
        newForm.classList.add('hidden');
        existingForm.classList.remove('hidden');
    }
}

// Mock Patient Data
const mockPatients = [
    { id: 1, name: 'John Anderson', email: 'john.a@email.com', phone: '(555) 123-4567', age: 45, lastVisit: '2024-01-15' },
    { id: 2, name: 'Maria Garcia', email: 'maria.g@email.com', phone: '(555) 234-5678', age: 32, lastVisit: '2024-02-20' },
    { id: 3, name: 'Robert Chen', email: 'robert.c@email.com', phone: '(555) 345-6789', age: 28, lastVisit: '2024-03-01' },
    { id: 4, name: 'Sarah Johnson', email: 'sarah.j@email.com', phone: '(555) 456-7890', age: 56, lastVisit: '2024-01-28' },
    { id: 5, name: 'Michael Brown', email: 'mike.b@email.com', phone: '(555) 567-8901', age: 41, lastVisit: '2024-02-14' },
    { id: 6, name: 'Emily Davis', email: 'emily.d@email.com', phone: '(555) 678-9012', age: 29, lastVisit: '2024-03-10' }
];

function initializeMockPatients() {
    // Pre-populate with all patients
    displayPatientResults(mockPatients);
}

function searchPatients(query) {
    const filtered = mockPatients.filter(patient => 
        patient.name.toLowerCase().includes(query.toLowerCase()) ||
        patient.email.toLowerCase().includes(query.toLowerCase()) ||
        patient.phone.includes(query)
    );
    displayPatientResults(filtered);
}

function displayPatientResults(patients) {
    const container = document.getElementById('patientResults');
    
    if (patients.length === 0) {
        container.innerHTML = `
            <div class="text-center py-8 text-gray-400">
                <p class="text-sm">No patients found</p>
            </div>
        `;
        return;
    }
    
    container.innerHTML = patients.map(patient => `
        <div onclick="selectPatient(${patient.id})" class="flex items-center gap-3 p-3 rounded-xl border border-gray-200 hover:border-blue-500 hover:bg-blue-50 cursor-pointer transition-all group">
            <div class="w-10 h-10 bg-gradient-to-br from-blue-400 to-blue-600 rounded-full flex items-center justify-center text-white font-semibold text-sm">
                ${patient.name.split(' ').map(n => n[0]).join('')}
            </div>
            <div class="flex-1 min-w-0">
                <p class="font-medium text-gray-900 truncate group-hover:text-blue-700">${patient.name}</p>
                <p class="text-xs text-gray-500 truncate">${patient.email} • ${patient.phone}</p>
            </div>
            <div class="text-xs text-gray-400">
                Age: ${patient.age}
            </div>
        </div>
    `).join('');
}

function selectPatient(id) {
    const patient = mockPatients.find(p => p.id === id);
    showToast(`Selected patient: ${patient.name}`);
    // In a real app, this would fill the form or mark as selected
}

// Category Selection
function selectCategory(category) {
    // Remove active class from all
    document.querySelectorAll('.category-btn').forEach(btn => {
        btn.classList.remove('border-blue-500', 'bg-blue-50', 'border-red-500', 'bg-red-50');
        btn.classList.add('border-gray-200');
    });
    
    // Add active class to selected
    const selectedBtn = document.querySelector(`[data-category="${category}"]`);
    if (category === 'emergency') {
        selectedBtn.classList.remove('border-gray-200');
        selectedBtn.classList.add('border-red-500', 'bg-red-50');
    } else {
        selectedBtn.classList.remove('border-gray-200');
        selectedBtn.classList.add('border-blue-500', 'bg-blue-50');
    }
    
    document.getElementById('selectedCategory').value = category;
}

// Time Slot Management
const timeSlotsData = {
    'dr-mitchell': ['09:00 AM', '09:30 AM', '10:00 AM', '10:30 AM', '11:00 AM', '02:00 PM', '02:30 PM', '03:00 PM', '03:30 PM', '04:00 PM'],
    'dr-johnson': ['08:00 AM', '08:30 AM', '09:00 AM', '11:30 AM', '01:00 PM', '01:30 PM', '03:30 PM', '04:30 PM'],
    'dr-williams': ['09:00 AM', '10:30 AM', '12:00 PM', '02:30 PM', '03:30 PM', '04:30 PM'],
    'dr-brown': ['08:30 AM', '09:30 AM', '10:30 AM', '01:30 PM', '02:30 PM', '03:00 PM'],
    'dr-davis': ['09:00 AM', '11:00 AM', '01:00 PM', '02:00 PM', '04:00 PM', '04:30 PM']
};

// Randomly book some slots to simulate reality
const bookedSlots = {};

function initializeDate() {
    const today = new Date().toISOString().split('T')[0];
    document.getElementById('appointmentDate').value = today;
    document.getElementById('appointmentDate').min = today;
    document.getElementById('currentDate').textContent = new Date().toLocaleDateString('en-US', { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' });
}

function updateTimeSlots() {
    const physician = document.getElementById('physicianSelect').value;
    const date = document.getElementById('appointmentDate').value;
    const container = document.getElementById('timeSlotsContainer');
    const dateDisplay = document.getElementById('selectedDateDisplay');
    
    if (!physician || !date) {
        container.innerHTML = `
            <div class="text-center py-12 text-gray-400">
                <i data-lucide="calendar-days" class="w-12 h-12 mx-auto mb-3 opacity-50"></i>
                <p class="text-sm">Please select a physician and date to view available time slots</p>
            </div>
        `;
        lucide.createIcons();
        return;
    }
    
    dateDisplay.textContent = new Date(date).toLocaleDateString('en-US', { weekday: 'long', month: 'short', day: 'numeric' });
    
    const slots = timeSlotsData[physician] || [];
    const booked = bookedSlots[`${physician}-${date}`] || [];
    
    // Generate morning and afternoon sections
    const morningSlots = slots.filter(time => {
        const hour = parseInt(time.split(':')[0]);
        const isPM = time.includes('PM');
        return (!isPM && hour < 12) || (isPM && hour === 12);
    });
    
    const afternoonSlots = slots.filter(time => {
        const hour = parseInt(time.split(':')[0]);
        const isPM = time.includes('PM');
        return isPM && hour !== 12;
    });
    
    let html = '';
    
    if (morningSlots.length > 0) {
        html += `
            <div class="mb-4">
                <p class="text-xs font-semibold text-gray-500 uppercase tracking-wider mb-3">Morning</p>
                <div class="grid grid-cols-2 gap-2">
                    ${morningSlots.map(time => createTimeSlotButton(time, booked.includes(time))).join('')}
                </div>
            </div>
        `;
    }
    
    if (afternoonSlots.length > 0) {
        html += `
            <div>
                <p class="text-xs font-semibold text-gray-500 uppercase tracking-wider mb-3">Afternoon</p>
                <div class="grid grid-cols-2 gap-2">
                    ${afternoonSlots.map(time => createTimeSlotButton(time, booked.includes(time))).join('')}
                </div>
            </div>
        `;
    }
    
    container.innerHTML = html;
}

function createTimeSlotButton(time, isBooked) {
    if (isBooked) {
        return `<button disabled class="time-slot booked py-2 px-3 rounded-lg border border-gray-200 text-sm font-medium">${time}</button>`;
    }
    return `<button onclick="selectTime('${time}')" class="time-slot py-2 px-3 rounded-lg border border-gray-200 text-sm font-medium text-gray-700 hover:border-blue-500 hover:text-blue-600 bg-white" data-time="${time}">${time}</button>`;
}

function selectTime(time) {
    // Remove previous selection
    document.querySelectorAll('.time-slot').forEach(btn => {
        btn.classList.remove('selected');
    });
    
    // Add selection to clicked button
    const buttons = document.querySelectorAll(`[data-time="${time}"]`);
    buttons.forEach(btn => btn.classList.add('selected'));
    
    // Show selected time display
    document.getElementById('selectedTimeDisplay').classList.remove('hidden');
    document.getElementById('confirmedTime').textContent = time;
}

// Form Actions
function saveAppointment() {
    const physician = document.getElementById('physicianSelect').value;
    const date = document.getElementById('appointmentDate').value;
    const category = document.getElementById('selectedCategory').value;
    const selectedTime = document.querySelector('.time-slot.selected');
    
    if (!physician) {
        showToast('Please select a physician', 'error');
        return;
    }
    if (!date) {
        showToast('Please select a date', 'error');
        return;
    }
    if (!category) {
        showToast('Please select an appointment category', 'error');
        return;
    }
    if (!selectedTime) {
        showToast('Please select a time slot', 'error');
        return;
    }
    
    // Simulate saving
    const time = selectedTime.getAttribute('data-time');
    
    // Mark slot as booked
    const key = `${physician}-${date}`;
    if (!bookedSlots[key]) bookedSlots[key] = [];
    bookedSlots[key].push(time);
    
    showToast('Appointment scheduled successfully!');
    
    // Reset after delay
    setTimeout(() => {
        resetForm();
    }, 2000);
}

function resetForm() {
    // Reset patient type
    setPatientType('new');
    
    // Reset inputs
    document.querySelectorAll('input[type="text"], input[type="email"], input[type="tel"], textarea').forEach(input => {
        input.value = '';
    });
    document.getElementById('physicianSelect').value = '';
    document.getElementById('selectedCategory').value = '';
    
    // Reset categories
    document.querySelectorAll('.category-btn').forEach(btn => {
        btn.classList.remove('border-blue-500', 'bg-blue-50', 'border-red-500', 'bg-red-50');
        btn.classList.add('border-gray-200');
    });
    
    // Reset time slots
    document.getElementById('timeSlotsContainer').innerHTML = `
        <div class="text-center py-12 text-gray-400">
            <i data-lucide="calendar-days" class="w-12 h-12 mx-auto mb-3 opacity-50"></i>
            <p class="text-sm">Please select a physician and date to view available time slots</p>
        </div>
    `;
    document.getElementById('selectedTimeDisplay').classList.add('hidden');
    document.getElementById('selectedDateDisplay').textContent = 'Select a date to view times';
    
    // Reset date to today
    initializeDate();
    
    lucide.createIcons();
}

function showToast(message, type = 'success') {
    const toast = document.getElementById('toast');
    const toastMessage = document.getElementById('toastMessage');
    
    toastMessage.textContent = message;
    
    if (type === 'error') {
        toast.querySelector('i').classList.remove('text-green-400');
        toast.querySelector('i').classList.add('text-red-400');
        toast.querySelector('i').setAttribute('data-lucide', 'alert-circle');
    } else {
        toast.querySelector('i').classList.remove('text-red-400');
        toast.querySelector('i').classList.add('text-green-400');
        toast.querySelector('i').setAttribute('data-lucide', 'check-circle');
    }
    
    lucide.createIcons();
    
    toast.classList.remove('translate-y-20', 'opacity-0');
    
    setTimeout(() => {
        toast.classList.add('translate-y-20', 'opacity-0');
    }, 3000);
}

// Close sidebar when clicking outside on mobile
document.addEventListener('click', function(e) {
    const sidebar = document.getElementById('sidebar');
    const toggleBtn = document.querySelector('button[onclick="toggleSidebar()"]');
    
    if (window.innerWidth < 1024) {
        if (!sidebar.contains(e.target) && !toggleBtn.contains(e.target)) {
            sidebar.classList.add('-translate-x-full');
            document.getElementById('sidebarOverlay').classList.remove('active');
        }
    }
});