{% extends "base.html" %}

{% block title %}Device Registry{% endblock %}

{% block content %}
<div class="row mb-4 align-items-center">
    <div class="col">
        <h2><i class="bi bi-tablet me-2"></i>Device Registry</h2>
        <p class="text-muted mb-0">
            iOS devices that have opened the JanitorialQC app.
            Records update on every app launch — <strong>Last Seen</strong> reflects the most recent foreground.
        </p>
    </div>
    <div class="col-auto">
        <span class="badge bg-secondary fs-6">{{ devices|length }} device{{ 's' if devices|length != 1 }}</span>
    </div>
</div>

{% with messages = get_flashed_messages(with_categories=true) %}
    {% for category, message in messages %}
        <div class="alert alert-{{ category }} alert-dismissible fade show" role="alert">
            {{ message }}
            <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
        </div>
    {% endfor %}
{% endwith %}

<div class="row g-4">

    {# ── Device Table ──────────────────────────────────────────────────── #}
    <div class="col-xl-8">
        <div class="card shadow-sm">
            <div class="card-header d-flex align-items-center gap-2">
                <i class="bi bi-list-ul"></i>
                <strong>Registered Devices</strong>
                <span class="text-muted fw-normal ms-1 small">sorted by most recently active</span>
                <div class="ms-auto">
                    <input type="text" id="deviceSearch" class="form-control form-control-sm"
                           placeholder="Filter…" style="width:180px;">
                </div>
            </div>
            <div class="card-body p-0">
                {% if devices %}
                <div class="table-responsive">
                    <table class="table table-hover table-sm mb-0" id="deviceTable">
                        <thead class="table-light">
                            <tr>
                                <th>Device</th>
                                <th>User</th>
                                <th class="text-center">App Ver.</th>
                                <th class="text-center">iOS Ver.</th>
                                <th>Last Seen</th>
                                <th>Registered</th>
                            </tr>
                        </thead>
                        <tbody>
                            {% for d in devices %}
                            {% set app_ver = d.app_version or '—' %}
                            <tr>
                                <td>
                                    <i class="bi bi-tablet me-1 text-muted"></i>
                                    {{ d.device_name or '—' }}
                                </td>
                                <td>
                                    <span class="fw-semibold">{{ d.user.display_name if d.user else '—' }}</span>
                                    {% if d.user %}
                                    <br><span class="text-muted small">{{ d.user.username }}</span>
                                    {% endif %}
                                </td>
                                <td class="text-center">
                                    <span class="badge version-badge" data-version="{{ d.app_version }}">
                                        {{ app_ver }}
                                    </span>
                                </td>
                                <td class="text-center text-muted small">{{ d.ios_version or '—' }}</td>
                                <td class="text-nowrap small">
                                    {{ d.last_seen_at.strftime('%b %-d, %Y') }}<br>
                                    <span class="text-muted" style="font-size:.75rem;">
                                        {{ d.last_seen_at.strftime('%I:%M %p') }}
                                    </span>
                                </td>
                                <td class="text-nowrap small text-muted">
                                    {{ d.registered_at.strftime('%b %-d, %Y') }}
                                </td>
                            </tr>
                            {% endfor %}
                        </tbody>
                    </table>
                </div>
                {% else %}
                <div class="text-center text-muted py-5">
                    <i class="bi bi-tablet fs-1 d-block mb-2 opacity-25"></i>
                    No devices registered yet. Devices appear here once the iOS app opens while online.
                </div>
                {% endif %}
            </div>
        </div>
    </div>

    {# ── Send Update Notice ────────────────────────────────────────────── #}
    <div class="col-xl-4">
        <div class="card shadow-sm">
            <div class="card-header bg-warning text-dark">
                <i class="bi bi-bell-fill me-2"></i><strong>Send Update Notice</strong>
            </div>
            <div class="card-body">
                <p class="text-muted small mb-3">
                    Sends an in-app notification to every user whose device is running
                    an app version <em>older</em> than the version you enter.
                    Delivered within 60 seconds via the app's background poll.
                    One notification per user (even if they have multiple devices).
                </p>
                <form method="POST" action="{{ url_for('devices.notify_update') }}"
                      onsubmit="return confirm('Send update notice to all users on older versions?')">
                    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">

                    <div class="mb-3">
                        <label for="current_version" class="form-label fw-semibold">
                            Current / Target Version <span class="text-danger">*</span>
                        </label>
                        <input type="text" class="form-control" id="current_version"
                               name="current_version" placeholder="e.g. 1.3.0"
                               pattern="^\d+\.\d+(\.\d+)?$"
                               title="Format: 1.0 or 1.3.0"
                               required>
                        <div class="form-text">
                            Devices running a version below this will receive the notice.
                        </div>
                    </div>

                    <div class="mb-4">
                        <label for="message" class="form-label fw-semibold">
                            Custom Message <span class="text-muted fw-normal">(optional)</span>
                        </label>
                        <textarea class="form-control" id="message" name="message"
                                  rows="3" maxlength="500"
                                  placeholder="Leave blank to use the default message."></textarea>
                    </div>

                    <div class="d-grid">
                        <button type="submit" class="btn btn-warning">
                            <i class="bi bi-send-fill me-2"></i>Send Update Notice
                        </button>
                    </div>
                </form>

                {% if devices %}
                <hr class="mt-4">
                <p class="text-muted small mb-2 fw-semibold">Version breakdown</p>
                <div id="versionBreakdown"></div>
                {% endif %}
            </div>
        </div>
    </div>

</div><!-- /row -->

<script>
// ── Inline filter ──────────────────────────────────────────────────────────
(function () {
    var input = document.getElementById('deviceSearch');
    if (!input) return;
    input.addEventListener('input', function () {
        var q = this.value.toLowerCase();
        document.querySelectorAll('#deviceTable tbody tr').forEach(function (row) {
            row.style.display = row.textContent.toLowerCase().includes(q) ? '' : 'none';
        });
    });
})();

// ── Version badges + breakdown ────────────────────────────────────────────
(function () {
    var badges = document.querySelectorAll('.version-badge[data-version]');
    if (!badges.length) return;

    // Collect all version strings from the table
    var versions = Array.from(badges).map(function (b) { return b.dataset.version || ''; });

    // Find the most-common latest version to use as the "current" baseline
    var freq = {};
    versions.forEach(function (v) { if (v) freq[v] = (freq[v] || 0) + 1; });
    var sorted = Object.keys(freq).sort(function (a, b) {
        return compareSemver(b, a); // desc — highest first
    });
    var latest = sorted[0] || '';

    // Colour each badge relative to the latest version seen in the table
    badges.forEach(function (badge) {
        var v = badge.dataset.version || '';
        if (!v || v === '—') {
            badge.classList.add('bg-secondary');
        } else if (v === latest) {
            badge.classList.add('bg-success');
        } else if (compareSemver(v, latest) < 0) {
            badge.classList.add('bg-danger');
        } else {
            badge.classList.add('bg-secondary');
        }
    });

    // Version breakdown summary
    var breakdown = document.getElementById('versionBreakdown');
    if (breakdown && sorted.length) {
        var html = '<ul class="list-unstyled mb-0">';
        sorted.forEach(function (v) {
            var cls = (v === latest) ? 'text-success fw-semibold' : 'text-danger';
            html += '<li class="d-flex justify-content-between small mb-1">'
                  + '<span class="' + cls + '">' + v + '</span>'
                  + '<span class="badge bg-secondary rounded-pill">' + freq[v] + ' device' + (freq[v] === 1 ? '' : 's') + '</span>'
                  + '</li>';
        });
        html += '</ul>';
        breakdown.innerHTML = html;
    }

    function compareSemver(a, b) {
        var pa = a.split('.').map(Number);
        var pb = b.split('.').map(Number);
        for (var i = 0; i < Math.max(pa.length, pb.length); i++) {
            var diff = (pa[i] || 0) - (pb[i] || 0);
            if (diff !== 0) return diff;
        }
        return 0;
    }
})();
</script>
{% endblock %}