{% extends "base.html" %}
{% block title %}Timetable{% endblock %}
{% block nav_timetable %}active{% endblock %}

{% block content %}
<div class="page-header">
    <div>
        <h2><i class="fa-solid fa-calendar-days me-2"></i>Timetable</h2>
        <p class="text-muted mb-0">Manage weekly class schedules by program</p>
    </div>
    <a href="{% url 'portal:timetable_add' %}" class="btn btn-primary">
        <i class="fa-solid fa-plus me-1"></i> Add Entry
    </a>
</div>

<!-- Filters -->
<form method="get" class="portal-card mb-4">
    <div class="portal-card-body">
        <div class="row g-3 align-items-end">
            <div class="col-md-4">
                <label class="form-label small fw-semibold">Program</label>
                <select name="program" class="form-select form-select-sm">
                    <option value="">All Programs</option>
                    {% for prog in programs %}
                    <option value="{{ prog.pk }}"
                        {% if current_program == prog.pk|stringformat:"s" %}selected{% endif %}>
                        {{ prog.name }}
                    </option>
                    {% endfor %}
                </select>
            </div>
            <div class="col-md-2">
                <label class="form-label small fw-semibold">Year Group</label>
                <select name="year" class="form-select form-select-sm">
                    <option value="">All Years</option>
                    {% for val, label in year_choices %}
                    <option value="{{ val }}" {% if current_year == val|stringformat:"s" %}selected{% endif %}>
                        {{ label }}
                    </option>
                    {% endfor %}
                </select>
            </div>
            <div class="col-md-2">
                <label class="form-label small fw-semibold">Term</label>
                <select name="term" class="form-select form-select-sm">
                    <option value="">All Terms</option>
                    {% for val, label in term_choices %}
                    <option value="{{ val }}" {% if current_term == val %}selected{% endif %}>{{ label }}</option>
                    {% endfor %}
                </select>
            </div>
            <div class="col-md-2">
                <label class="form-label small fw-semibold">Academic Year</label>
                <input type="text" name="academic_year" class="form-control form-control-sm"
                       placeholder="e.g. 2025/2026" value="{{ current_academic_year }}">
            </div>
            <div class="col-md-2 d-flex gap-1">
                <button type="submit" class="btn btn-primary btn-sm flex-grow-1">
                    <i class="fa-solid fa-filter me-1"></i> Filter
                </button>
                {% if current_program or current_year or current_term or current_academic_year %}
                <a href="{% url 'portal:timetable_list' %}" class="btn btn-outline-secondary btn-sm" title="Clear">
                    <i class="fa-solid fa-xmark"></i>
                </a>
                {% endif %}
            </div>
        </div>
    </div>
</form>

{% if entries_by_year_day %}
<div class="accordion" id="ttYearAccordion">
    {% for year_group in entries_by_year_day %}
    {% with yi=forloop.counter %}
    <div class="accordion-item mb-3 border rounded overflow-hidden">
        <h2 class="accordion-header" id="ttYearHead{{ yi }}">
            <button class="accordion-button fw-bold{% if not forloop.first %} collapsed{% endif %}"
                    type="button" data-bs-toggle="collapse" data-bs-target="#ttYear{{ yi }}"
                    aria-expanded="{% if forloop.first %}true{% else %}false{% endif %}"
                    aria-controls="ttYear{{ yi }}" style="color: var(--color-primary);">
                <i class="fa-solid fa-layer-group me-2"></i>{{ year_group.year_name }}
            </button>
        </h2>
        <div id="ttYear{{ yi }}" class="accordion-collapse collapse{% if forloop.first %} show{% endif %}"
             aria-labelledby="ttYearHead{{ yi }}" data-bs-parent="#ttYearAccordion">
            <div class="accordion-body bg-light">
                <div class="accordion" id="ttDayAccordion{{ yi }}">
                    {% for day_group in year_group.days %}
                    <div class="accordion-item">
                        <h2 class="accordion-header" id="ttDayHead{{ yi }}_{{ forloop.counter }}">
                            <button class="accordion-button{% if not forloop.first %} collapsed{% endif %}"
                                    type="button" data-bs-toggle="collapse"
                                    data-bs-target="#ttDay{{ yi }}_{{ forloop.counter }}"
                                    aria-expanded="{% if forloop.first %}true{% else %}false{% endif %}"
                                    aria-controls="ttDay{{ yi }}_{{ forloop.counter }}">
                                <i class="fa-solid fa-calendar-day me-2 text-muted"></i>
                                <span class="fw-semibold">{{ day_group.day_name }}</span>
                                <span class="badge bg-secondary ms-2">{{ day_group.entries|length }} slot{{ day_group.entries|length|pluralize }}</span>
                            </button>
                        </h2>
                        <div id="ttDay{{ yi }}_{{ forloop.counter }}"
                             class="accordion-collapse collapse{% if forloop.first %} show{% endif %}"
                             data-bs-parent="#ttDayAccordion{{ yi }}">
                            <div class="accordion-body p-0">
                                <div class="table-responsive">
                                    <table class="table table-hover mb-0">
                                        <thead class="table-light">
                                            <tr>
                                                <th style="width:130px;">Time</th>
                                                <th>Subject / Course</th>
                                                <th>Program</th>
                                                <th>Term · Year</th>
                                                <th>Venue</th>
                                                <th style="width:90px;">Actions</th>
                                            </tr>
                                        </thead>
                                        <tbody>
                                            {% for entry in day_group.entries %}
                                            <tr>
                                                <td class="text-nowrap fw-semibold">
                                                    {{ entry.start_time|time:"H:i" }} – {{ entry.end_time|time:"H:i" }}
                                                </td>
                                                <td>
                                                    <span class="fw-semibold">{{ entry.display_name }}</span>
                                                    {% if entry.course and entry.subject %}
                                                    <span class="text-muted small d-block">{{ entry.course.name }}</span>
                                                    {% endif %}
                                                </td>
                                                <td class="small">{{ entry.program.name }}</td>
                                                <td class="small">{{ entry.get_term_display }} · {{ entry.academic_year }}</td>
                                                <td class="small text-muted">{{ entry.venue|default:"—" }}</td>
                                                <td>
                                                    <div class="d-flex gap-1">
                                                        <a href="{% url 'portal:timetable_edit' entry.pk %}"
                                                           class="btn btn-xs btn-outline-secondary" title="Edit">
                                                            <i class="fa-solid fa-pen"></i>
                                                        </a>
                                                        <a href="{% url 'portal:timetable_delete' entry.pk %}"
                                                           class="btn btn-xs btn-outline-danger" title="Delete">
                                                            <i class="fa-solid fa-trash"></i>
                                                        </a>
                                                    </div>
                                                </td>
                                            </tr>
                                            {% endfor %}
                                        </tbody>
                                    </table>
                                </div>
                            </div>
                        </div>
                    </div>
                    {% endfor %}
                </div>
            </div>
        </div>
    </div>
    {% endwith %}
    {% endfor %}
</div>
{% else %}
<div class="portal-card">
    <div class="portal-card-body text-center py-5 text-muted">
        <i class="fa-solid fa-calendar-days fa-2x mb-3 d-block"></i>
        <p class="mb-2">No timetable entries found.</p>
        {% if current_program or current_year or current_term or current_academic_year %}
        <p class="small mb-3">Try adjusting or clearing your filters.</p>
        <a href="{% url 'portal:timetable_list' %}" class="btn btn-sm btn-outline-secondary me-2">Clear Filters</a>
        {% endif %}
        <a href="{% url 'portal:timetable_add' %}" class="btn btn-sm btn-primary">
            <i class="fa-solid fa-plus me-1"></i> Add First Entry
        </a>
    </div>
</div>
{% endif %}
{% endblock %}