{% extends "layouts/base.html" %}
{% block title %}{{ _('Manage Availability') }} - UdeS team manager{% endblock %}
{% block page_title %}{{ _('Manage Availability') }}{% endblock %}
{% block breadcrumb %}<span class="breadcrumb">Home / Coach Availability</span>{% endblock %}

{% block content %}
<div class="card">
    <div class="card-header">
        <h3><i class="fas fa-clock"></i> {{ _('Set Your Weekly Availability') }}</h3>
        <p class="text-muted small">{{ _('Select time slots when you\'re available for One on One sessions') }}</p>
    </div>
    <div class="card-body">
        <div class="availability-grid" id="availability-grid">
            <p class="text-muted">{{ _('Loading availability grid...') }}</p>
        </div>
        
        <div class="form-actions mt-4">
            <button type="button" class="btn btn-primary" data-action="save-availability">
                <i class="fas fa-save"></i> {{ _('Save Availability') }}
            </button>
            <button type="button" class="btn btn-secondary" data-action="clear-availability">
                <i class="fas fa-trash"></i> {{ _('Clear All') }}
            </button>
        </div>
    </div>
</div>

{% endblock %}

{% block scripts %}
<style>
.availability-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 12px;
    margin-top: 10px;
}

.day-column {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 10px;
    min-height: 300px;
}

.day-header {
    text-align: center;
    font-weight: 600;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 10px;
    color: var(--primary);
}

.time-slot {
    padding: 6px 8px;
    margin: 4px 0;
    border-radius: 4px;
    font-size: 0.8rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.time-slot:hover {
    background: var(--primary-light);
    border-color: var(--primary);
}

.time-slot.selected {
    background: var(--primary);
    color: white;
    border-color: var(--primary-dark);
}

.time-slot.selected:hover {
    background: var(--danger);
}

@media (max-width: 768px) {
    .availability-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 480px) {
    .availability-grid {
        grid-template-columns: 1fr;
    }
}
</style>
<script nonce="{{ csp_nonce }}">
// Time slots from 8:00 AM to 10:00 PM (30-minute intervals)
const TIME_SLOTS = [];
for (let h = 8; h <= 22; h++) {
    for (let m = 0; m < 60; m += 30) {
        const timeStr = (h < 10 ? '0' : '') + h + ':' + (m < 10 ? '0' : '') + m;
        const displayHour = h > 12 ? h - 12 : h;
        const displayAmpm = h >= 12 ? 'PM' : 'AM';
        const displayTime = displayHour + ':' + (m < 10 ? '0' : '') + m + ' ' + displayAmpm;
        TIME_SLOTS.push({ time: timeStr, display: displayTime });
    }
}

// Day names
const DAYS = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'];

// Track selected slots: {day_of_week: [time_strings]}
let selectedSlots = {};

// Initialize
document.addEventListener('DOMContentLoaded', function() {
    loadExistingAvailability();
    renderGrid();
});

function loadExistingAvailability() {
    // Load from existing data
    {% for av in existing_availability %}
    if (!selectedSlots[{{ av.day_of_week }}]) {
        selectedSlots[{{ av.day_of_week }}] = [];
    }
    selectedSlots[{{ av.day_of_week }}].push('{{ av.start_time.strftime('%H:%M') }}');
    {% endfor %}
}

function renderGrid() {
    const grid = document.getElementById('availability-grid');
    let html = '';
    
    DAYS.forEach((day, dayIndex) => {
        html += '<div class="day-column">';
        html += '<div class="day-header">' + day.substring(0, 3) + '</div>';
        
        TIME_SLOTS.forEach(slot => {
            const isSelected = selectedSlots[dayIndex] && selectedSlots[dayIndex].includes(slot.time);
            const cssClass = isSelected ? 'time-slot selected' : 'time-slot';
            html += '<div class="' + cssClass + '" data-day="' + dayIndex + '" data-time="' + slot.time + '" data-action="toggle-slot">' + slot.display + '</div>';
        });
        
        html += '</div>';
    });
    
    grid.innerHTML = html;
}

function toggleSlot(element) {
    const dayOfWeek = Number(element.getAttribute('data-day'));
    const timeStr = element.getAttribute('data-time');
    if (!selectedSlots[dayOfWeek]) {
        selectedSlots[dayOfWeek] = [];
    }
    
    const index = selectedSlots[dayOfWeek].indexOf(timeStr);
    if (index === -1) {
        selectedSlots[dayOfWeek].push(timeStr);
        element.classList.add('selected');
    } else {
        selectedSlots[dayOfWeek].splice(index, 1);
        element.classList.remove('selected');
    }
}

function saveAvailability() {
    const slots = [];
    for (let day in selectedSlots) {
        selectedSlots[day].forEach(time => {
            slots.push({ day_of_week: parseInt(day), start_time: time });
        });
    }
    
    fetch('{{ url_for("users.manage_coach_availability") }}', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
            'X-CSRFToken': '{{ csrf_token() }}'
        },
        body: JSON.stringify({ slots: slots })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            flash('Availability saved!', 'success');
        } else {
            flash(data.error || 'Error saving availability.', 'danger');
        }
    })
    .catch(function(error) {
        console.error('Save error:', error);
        flash('Error saving availability.', 'danger');
    });
}

function clearAllAvailability() {
    if (!confirm('Are you sure you want to clear all your availability slots?')) {
        return;
    }
    
    fetch('{{ url_for("users.clear_coach_availability") }}', {
        method: 'POST',
        headers: { 'X-CSRFToken': '{{ csrf_token() }}' }
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            selectedSlots = {};
            renderGrid();
            flash('Availability cleared!', 'success');
        }
    });
}

function flash(message, type) {
    const flashContainer = document.querySelector('.flash-messages');
    const alert = document.createElement('div');
    alert.className = 'alert alert-' + type + ' alert-dismissible';
    const text = document.createElement('span');
    text.textContent = message;
    const close = document.createElement('button');
    close.type = 'button';
    close.className = 'alert-close';
    close.dataset.action = 'remove-element';
    close.textContent = '×';
    alert.append(text, close);
    flashContainer.appendChild(alert);
}

// Auto-save on change (debounced)
let saveTimeout;
document.addEventListener('click', function(e) {
    if (e.target.classList.contains('time-slot')) {
        clearTimeout(saveTimeout);
        saveTimeout = setTimeout(saveAvailability, 1000);
    }
});

// Behaviours are declared in the markup with data-action / data-change and
// dispatched by the delegated listener in main.js. This replaces inline
// onclick attributes, which no CSP nonce is able to authorise.
registerActions({
    'save-availability': saveAvailability,
    'clear-availability': clearAllAvailability,
    'toggle-slot': toggleSlot,
});
</script>
{% endblock %}