{% extends "base.html" %}

{% block title %}Add Reservation - Edu-Space Admin{% endblock %}

{% block content %}
<div class="container-fluid pt-5 mt-4">
<div class="row">
    <div class="col-12">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h1 class="h3">
                <i class="bi bi-calendar-plus text-success"></i> New Reservation
            </h1>
            <a href="{{ url_for('schedule.list_reservations') }}" class="btn btn-outline-secondary">
                <i class="bi bi-arrow-left"></i> Back to Reservations
            </a>
        </div>
    </div>
</div>

<div class="row">
    <div class="col-lg-8 mx-auto">
        <div class="card border-0 shadow-sm">
            <div class="card-header bg-white border-0">
                <h5 class="mb-0">
                    <i class="bi bi-calendar3 text-success"></i> Reservation Details
                </h5>
            </div>
            <div class="card-body">
                <form method="POST" id="reservation-form" novalidate>
                    {{ form.hidden_tag() }}
                    
                    <div class="row">
                        <div class="col-md-6 mb-3">
                            {{ form.classroom_id.label(class="form-label") }}
                            {{ form.classroom_id(class="form-select", id="classroom-select") }}
                            {% if form.classroom_id.errors %}
                                <div class="text-danger small mt-1">
                                    {{ form.classroom_id.errors[0] }}
                                </div>
                            {% endif %}
                            <small class="text-muted">Select a classroom for your reservation</small>
                        </div>
                        
                        <div class="col-md-6 mb-3">
                            {{ form.commission_id.label(class="form-label") }}
                            {{ form.commission_id(class="form-select", id="commission-select") }}
                            {% if form.commission_id.errors %}
                                <div class="text-danger small mt-1">
                                    {{ form.commission_id.errors[0] }}
                                </div>
                            {% endif %}
                            <small class="text-muted">Select the subject/commission</small>
                        </div>
                    </div>
                    
                    <div class="row">
                        <div class="col-md-6 mb-3">
                            {{ form.start_time.label(class="form-label") }}
                            {{ form.start_time(class="form-control", id="start-time") }}
                            {% if form.start_time.errors %}
                                <div class="text-danger small mt-1">
                                    {{ form.start_time.errors[0] }}
                                </div>
                            {% endif %}
                            <small class="text-muted">When will the class start?</small>
                        </div>
                        
                        <div class="col-md-6 mb-3">
                            {{ form.end_time.label(class="form-label") }}
                            {{ form.end_time(class="form-control", id="end-time") }}
                            {% if form.end_time.errors %}
                                <div class="text-danger small mt-1">
                                    {{ form.end_time.errors[0] }}
                                </div>
                            {% endif %}
                            <small class="text-muted">When will the class end?</small>
                        </div>
                    </div>
                    
                    <div class="row">
                        <div class="col-md-8 mb-3">
                            {{ form.purpose.label(class="form-label") }}
                            {{ form.purpose(class="form-control", placeholder="Regular class, exam, study session, etc.") }}
                            {% if form.purpose.errors %}
                                <div class="text-danger small mt-1">
                                    {{ form.purpose.errors[0] }}
                                </div>
                            {% endif %}
                        </div>
                        
                        <div class="col-md-4 mb-3">
                            {{ form.expected_attendees.label(class="form-label") }}
                            {{ form.expected_attendees(class="form-control", placeholder="30") }}
                            {% if form.expected_attendees.errors %}
                                <div class="text-danger small mt-1">
                                    {{ form.expected_attendees.errors[0] }}
                                </div>
                            {% endif %}
                            <small class="text-muted">Number of expected attendees</small>
                        </div>
                    </div>
                    
                    <div class="mb-4">
                        {{ form.notes.label(class="form-label") }}
                        {{ form.notes(class="form-control", rows="3", placeholder="Any additional notes or special requirements...") }}
                        {% if form.notes.errors %}
                            <div class="text-danger small mt-1">
                                {{ form.notes.errors[0] }}
                            </div>
                        {% endif %}
                    </div>
                    
                    <!-- Summary Section -->
                    <div class="alert alert-info" id="reservation-summary">
                        <h6 class="alert-heading">
                            <i class="bi bi-info-circle"></i> Reservation Summary
                        </h6>
                        <div id="summary-content">
                            <p class="mb-2">
                                <strong>Selected Classroom:</strong> 
                                <span id="summary-classroom">Not selected</span>
                            </p>
                            <p class="mb-2">
                                <strong>Duration:</strong> 
                                <span id="summary-duration">Not calculated</span>
                            </p>
                            <p class="mb-0">
                                <strong>Commission:</strong> 
                                <span id="summary-commission">Not selected</span>
                            </p>
                        </div>
                    </div>
                    
                    <div class="d-flex justify-content-between">
                        <a href="{{ url_for('schedule.list_reservations') }}" class="btn btn-outline-secondary">
                            <i class="bi bi-x-circle"></i> Cancel
                        </a>
                        {{ form.submit(class="btn btn-success") }}
                    </div>
                </form>
            </div>
        </div>
    </div>
</div>

<!-- Instructions Card -->
<div class="row mt-4">
    <div class="col-lg-8 mx-auto">
        <div class="card border-0 shadow-sm">
            <div class="card-header bg-white border-0">
                <h5 class="mb-0">
                    <i class="bi bi-question-circle text-info"></i> Reservation Guidelines
                </h5>
            </div>
            <div class="card-body">
                <div class="row">
                    <div class="col-md-6">
                        <h6 class="text-primary">📅 Booking Rules</h6>
                        <ul class="small">
                            <li>Reservations can be made up to 3 months in advance</li>
                            <li>Cannot book in the past</li>
                            <li>Maximum duration: 8 hours per reservation</li>
                            <li>Cancellations must be 24 hours before start time</li>
                        </ul>
                    </div>
                    <div class="col-md-6">
                        <h6 class="text-warning">🚨 Important Notes</h6>
                        <ul class="small">
                            <li>Check classroom capacity before booking</li>
                            <li>Pending reservations require approval</li>
                            <li>Time slots must not overlap</li>
                            <li>System automatically detects conflicts</li>
                        </ul>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
</div>
{% endblock %}

{% block extra_js %}
<script>
$(document).ready(function() {
    // Classroom data for capacity checking
    const classroomData = {};
    {% for classroom in classroom_list %}
    classroomData[{{ classroom.id }}] = {
        capacity: {{ classroom.capacity }},
        code: "{{ classroom.code }}"
    };
    {% endfor %}
    
    function updateSummary() {
        const classroomId = $('#classroom-select').val();
        const commissionId = $('#commission-select').val();
        const startTime = $('#start-time').val();
        const endTime = $('#end-time').val();
        
        // Update classroom summary
        if (classroomId && classroomData[classroomId]) {
            $('#summary-classroom').text(`${classroomData[classroomId].code} (Capacity: ${classroomData[classroomId].capacity})`);
        } else {
            $('#summary-classroom').text('Not selected');
        }
        
        // Update commission summary
        if (commissionId) {
            const commissionText = $('#commission-select option:selected').text();
            $('#summary-commission').text(commissionText);
        } else {
            $('#summary-commission').text('Not selected');
        }
        
        // Calculate duration
        if (startTime && endTime) {
            const start = new Date(startTime);
            const end = new Date(endTime);
            
            if (end > start) {
                const diffMs = end - start;
                const diffHours = Math.floor(diffMs / (1000 * 60 * 60));
                const diffMins = Math.floor((diffMs % (1000 * 60 * 60)) / (1000 * 60));
                
                let durationText = '';
                if (diffHours > 0) {
                    durationText += `${diffHours} hour${diffHours > 1 ? 's' : ''}`;
                }
                if (diffMins > 0) {
                    if (durationText) durationText += ' ';
                    durationText += `${diffMins} minute${diffMins > 1 ? 's' : ''}`;
                }
                
                $('#summary-duration').text(durationText);
            } else {
                $('#summary-duration').text('Invalid time range');
            }
        } else {
            $('#summary-duration').text('Not calculated');
        }
    }
    
    // Check capacity vs expected attendees
    function checkCapacity() {
        const classroomId = $('#classroom-select').val();
        const attendees = parseInt($('#expected_attendees').val()) || 0;
        
        if (classroomId && classroomData[classroomId] && attendees > 0) {
            const capacity = classroomData[classroomId].capacity;
            
            if (attendees > capacity) {
                $('#expected_attendees').addClass('is-invalid');
                $('#expected_attendees').after(`
                    <div class="invalid-feedback">
                        Expected attendees (${attendees}) exceeds classroom capacity (${capacity})
                    </div>
                `);
            } else {
                $('#expected_attendees').removeClass('is-invalid');
                $('#expected_attendees').siblings('.invalid-feedback').remove();
            }
        }
    }
    
    // Update on change
    $('#classroom-select, #commission-select, #start-time, #end-time, #expected_attendees').on('change', updateSummary);
    $('#expected_attendees').on('input', checkCapacity);
    
    // Initialize summary
    updateSummary();
    
    // Form validation
    $('#reservation-form').on('submit', function(e) {
        let isValid = true;
        
        // Check required fields
        if (!$('#classroom-select').val()) {
            $('#classroom-select').addClass('is-invalid');
            isValid = false;
        } else {
            $('#classroom-select').removeClass('is-invalid');
        }
        
        if (!$('#commission-select').val()) {
            $('#commission-select').addClass('is-invalid');
            isValid = false;
        } else {
            $('#commission-select').removeClass('is-invalid');
        }
        
        if (!$('#start-time').val()) {
            $('#start-time').addClass('is-invalid');
            isValid = false;
        } else {
            $('#start-time').removeClass('is-invalid');
        }
        
        if (!$('#end-time').val()) {
            $('#end-time').addClass('is-invalid');
            isValid = false;
        } else {
            $('#end-time').removeClass('is-invalid');
        }
        
        // Validate time range
        const startTime = new Date($('#start-time').val());
        const endTime = new Date($('#end-time').val());
        
        if (endTime <= startTime) {
            $('#end-time').addClass('is-invalid');
            isValid = false;
        }
        
        // Check capacity
        checkCapacity();
        if ($('#expected_attendees').hasClass('is-invalid')) {
            isValid = false;
        }
        
        return isValid;
    });
    
    // Set minimum datetime to current
    const now = new Date();
    now.setMinutes(now.getMinutes() - now.getTimezoneOffset());
    $('#start-time, #end-time').attr('min', now.toISOString().slice(0, 16));
});
</script>
{% endblock %}