{% extends "base.html" %}
{% block title %}Print QR Codes{% endblock %}

{% block content %}
<style>
    .qr-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .qr-item { position: relative; break-inside: avoid; page-break-inside: avoid;
               text-align: center; cursor: pointer; }
    .qr-item img { width: 220px; height: 220px; max-width: 100%; }
    .qr-item.qr-selected { outline: 3px solid #2563eb; outline-offset: -1px; }
    .qr-check { position: absolute; top: 10px; left: 10px; }
    .qr-check .form-check-input { width: 1.25rem; height: 1.25rem; }
    .qr-kind { font-size: .68rem; letter-spacing: .08em; }
    @media print {
        .no-print { display: none !important; }
        .navbar, nav, footer { display: none !important; }
        .qr-item { border: 1px dashed #bbb !important; cursor: default; }
        .qr-item.qr-selected { outline: none !important; }
        .qr-grid { gap: 8px; }
        /* When printing a selection, hide the unselected cards. */
        body.print-selected-only .qr-item:not(.qr-selected) { display: none !important; }
    }
</style>

<div class="d-flex justify-content-between align-items-center mb-3 no-print">
    <div>
        <h2 class="h4 mb-0"><i class="bi bi-qr-code"></i> QR Codes</h2>
        <div class="text-muted small">
            {% if selected_contract %}Contract: {{ selected_contract.name }} — {% endif %}
            {{ facilities|length }} facilit{{ 'y' if facilities|length == 1 else 'ies' }}
            {% if include_areas %}(with areas){% endif %}
        </div>
    </div>
    <a href="{{ url_for('facilities.list_facilities') }}" class="btn btn-outline-secondary btn-sm">
        <i class="bi bi-arrow-left"></i> Back
    </a>
</div>

{# ── Filter bar (GET reload) ─────────────────────────────────────────────── #}
<form method="get" id="filterForm" class="card card-body mb-3 no-print">
    <div class="row g-2 align-items-end">
        <div class="col-md-4">
            <label class="form-label small fw-semibold mb-1">Contract</label>
            <select name="contract_id" class="form-select form-select-sm"
                    onchange="document.getElementById('facilitySelect').value=''; this.form.submit();">
                <option value="">All Contracts</option>
                {% for c in contracts %}
                <option value="{{ c.id }}" {{ 'selected' if selected_contract_id == c.id }}>{{ c.name }}</option>
                {% endfor %}
            </select>
        </div>
        <div class="col-md-4">
            <label class="form-label small fw-semibold mb-1">Facility</label>
            <select name="facility_id" id="facilitySelect" class="form-select form-select-sm">
                <option value="">All Facilities</option>
                {% for f in facility_options %}
                <option value="{{ f.id }}" {{ 'selected' if selected_facility_id == f.id }}>{{ f.name }}</option>
                {% endfor %}
            </select>
        </div>
        <div class="col-md-2">
            <div class="form-check">
                <input class="form-check-input" type="checkbox" name="include_areas" value="1"
                       id="includeAreas" {{ 'checked' if include_areas }}>
                <label class="form-check-label small" for="includeAreas">Include area QR codes</label>
            </div>
        </div>
        <div class="col-md-2">
            <button type="submit" class="btn btn-primary btn-sm w-100">
                <i class="bi bi-funnel"></i> Apply
            </button>
        </div>
    </div>
</form>

{# ── Selection toolbar + export form ─────────────────────────────────────── #}
<form method="post" action="{{ url_for('facilities.qr_export_pdf') }}" id="qrForm">
    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">

    <div class="d-flex align-items-center gap-2 mb-3 no-print flex-wrap">
        <button type="button" class="btn btn-outline-secondary btn-sm" onclick="selectAllQr(true)">Select All</button>
        <button type="button" class="btn btn-outline-secondary btn-sm" onclick="selectAllQr(false)">Clear</button>
        <span class="text-muted small" id="selCount">0 selected</span>
        <div class="ms-auto d-flex gap-2">
            <button type="button" class="btn btn-primary btn-sm" onclick="printSelected()">
                <i class="bi bi-printer"></i> Print Selected
            </button>
            <button type="submit" class="btn btn-danger btn-sm">
                <i class="bi bi-file-earmark-pdf"></i> Export Selected to PDF
            </button>
        </div>
    </div>

    {% if facilities %}
    <div class="qr-grid">
        {% for f in facilities %}
        {# Facility QR card #}
        <label class="qr-item card shadow-sm p-3 mb-0">
            <div class="qr-check no-print">
                <input type="checkbox" class="form-check-input qr-cb" name="facility_ids" value="{{ f.id }}">
            </div>
            <div class="text-muted text-uppercase qr-kind">Facility</div>
            <div class="fw-bold">{{ f.name }}</div>
            {% if f.project %}
            <div class="text-muted small mb-1">{{ f.project.name }}</div>
            {% endif %}
            <div>
                <img src="{{ url_for('facilities.facility_qr_png', facility_id=f.id) }}"
                     alt="QR code for {{ f.name }}" loading="lazy">
            </div>
            <div class="small">Report a problem &amp; view recent quality</div>
        </label>

        {% if include_areas %}
            {% for a in areas_by_facility.get(f.id, []) %}
            {# Area QR card #}
            <label class="qr-item card shadow-sm p-3 mb-0">
                <div class="qr-check no-print">
                    <input type="checkbox" class="form-check-input qr-cb" name="area_ids" value="{{ a.id }}">
                </div>
                <div class="text-muted text-uppercase qr-kind">Area</div>
                <div class="fw-bold">{{ a.name }}</div>
                <div class="text-muted small mb-1">{{ f.name }}</div>
                <div>
                    <img src="{{ url_for('facilities.area_qr_png', area_id=a.id) }}"
                         alt="QR code for {{ a.name }}" loading="lazy">
                </div>
                <div class="small">Report a problem &amp; view recent quality</div>
            </label>
            {% endfor %}
        {% endif %}
        {% endfor %}
    </div>
    {% else %}
    <div class="alert alert-info">No facilities match the selected filters.</div>
    {% endif %}
</form>

<p class="text-muted small mt-3 no-print">
    Tip: tick the codes you want, then <strong>Print Selected</strong> or
    <strong>Export Selected to PDF</strong>. With nothing ticked, Print Selected prints them all.
</p>

<script>
(function () {
    'use strict';

    function checkboxes() { return document.querySelectorAll('.qr-cb'); }

    function updateCount() {
        var n = document.querySelectorAll('.qr-cb:checked').length;
        document.getElementById('selCount').textContent = n + ' selected';
    }

    function syncCard(cb) {
        var card = cb.closest('.qr-item');
        if (card) { card.classList.toggle('qr-selected', cb.checked); }
    }

    window.selectAllQr = function (state) {
        checkboxes().forEach(function (cb) { cb.checked = state; syncCard(cb); });
        updateCount();
    };

    window.printSelected = function () {
        var anySelected = document.querySelectorAll('.qr-cb:checked').length > 0;
        if (anySelected) { document.body.classList.add('print-selected-only'); }
        window.print();
        setTimeout(function () {
            document.body.classList.remove('print-selected-only');
        }, 500);
    };

    // Toggling a checkbox inside its <label> card also fires on the label click.
    checkboxes().forEach(function (cb) {
        cb.addEventListener('change', function () { syncCard(cb); updateCount(); });
    });

    updateCount();
}());
</script>
{% endblock %}