{% extends "base.html" %}

{% block title_extra %} — {{ _('my_connections_title') }}{% endblock %}
{% block page_class %}page page--my-connections{% endblock %}

{% block content %}
<section>
    <div class="page-header">
        <h1 class="section-title page-header__title">
            <span class="icon"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"/><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"/></svg></span>
            {{ _('my_connections_title') }}
        </h1>

        <div id="selfServiceControls" class="page-header__actions hidden">
            <span id="connectionsCounter" class="badge badge-info" style="font-size:0.85rem;"></span>
            <button class="btn btn-primary" onclick="openCreateConnectionModal()">
                <span>＋</span> {{ _('create_connection') }}
            </button>
        </div>
    </div>

    <div id="selfServiceDisabledMsg" class="hidden" style="margin-bottom:var(--space-lg);">
        <div class="card" style="padding:var(--space-lg); text-align:center; color:var(--text-muted);">
            {{ _('self_service_disabled') }}
        </div>
    </div>

    <div id="connectionsContainer" class="hidden">
        <div id="connectionsGrid" class="cards-grid-2">
            <!-- Connections will be loaded here via JS -->
        </div>
    </div>

    <div id="connectionsLoading" style="text-align: center; padding: 4rem;">
        <div class="spinner" style="width: 40px; height: 40px; margin: 0 auto;"></div>
        <p style="margin-top: 1rem; color: var(--text-muted);">{{ _('loading_connections') }}</p>
    </div>

    <div id="connectionsEmpty" class="empty-state hidden">
        <div class="empty-icon">🔗</div>
        <div class="empty-title">{{ _('nothing_found') }}</div>
        <div class="empty-desc">{{ _('search_empty_desc') }}</div>
    </div>

    <div id="noConnectionsState" class="empty-state hidden">
        <div class="empty-icon">🔗</div>
        <div class="empty-title">{{ _('no_connections') }}</div>
        <div class="empty-desc">{{ _('no_connections_user_desc') }}</div>
    </div>
</section>

<!-- ===== Create Connection Modal ===== -->
<div class="modal-backdrop" id="createConnectionModal">
    <div class="modal" style="max-width: 460px;">
        <div class="modal-header">
            <h2 class="modal-title">{{ _('create_connection') }}</h2>
            <button class="modal-close" onclick="closeModal('createConnectionModal')">×</button>
        </div>

        <form id="createConnectionForm" onsubmit="return submitCreateConnection(event)">
            <div class="form-group">
                <label class="form-label">{{ _('server_label') }}</label>
                <select class="form-select" id="createConnServer" onchange="updateCreateConnProtocols()">
                    <option value="" disabled selected>{{ _('loading') }}</option>
                </select>
            </div>

            <div class="form-group">
                <label class="form-label">{{ _('protocol_label') }}</label>
                <select class="form-select" id="createConnProtocol">
                    <option value="" disabled selected>{{ _('loading') }}</option>
                </select>
            </div>

            <div class="form-group">
                <label class="form-label">{{ _('device_name') }}</label>
                <input class="form-input" type="text" id="createConnName"
                    placeholder="{{ _('connection_name_placeholder') }}" maxlength="100" required>
            </div>

            <div id="createConnectionError" style="color: var(--danger, #ef4444); font-size: 0.85rem; margin-bottom: var(--space-sm);"></div>

            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" onclick="closeModal('createConnectionModal')">{{ _('cancel') }}</button>
                <button type="submit" class="btn btn-primary" id="createConnBtn">
                    <span id="createConnBtnText">{{ _('create') }}</span>
                    <div class="spinner hidden" id="createConnSpinner"></div>
                </button>
            </div>
        </form>
    </div>
</div>

<!-- ===== Config Modal ===== -->
<div class="modal-backdrop" id="configModal">
    <div class="modal" style="max-width: 600px;">
        <div class="modal-header">
            <h2 class="modal-title" id="configModalTitle">{{ _('config') }}</h2>
            <button class="modal-close" onclick="closeModal('configModal')">×</button>
        </div>

        <div class="config-tabs">
            <button class="config-tab active" onclick="switchConfigTab('conf')">{{ _('config_tab') }}</button>
            <button class="config-tab" onclick="switchConfigTab('vpn')">{{ _('vpn_key_tab') }}</button>
            <button class="config-tab" onclick="switchConfigTab('qr')">{{ _('qr_code_tab') }}</button>
        </div>

        <div class="config-panel active" id="panel-conf">
            <div class="config-display">
                <div class="config-text" id="configText"></div>
                <div class="config-actions">
                    <button class="btn btn-secondary btn-sm" onclick="copyToClipboard(currentConfig)" style="flex:1">
                        {{ _('copy_config') }}
                    </button>
                    <button class="btn btn-primary btn-sm"
                        onclick="downloadFile(currentConfig, currentConfigName + '.conf')" style="flex:1">
                        {{ _('download_conf') }}
                    </button>
                </div>
            </div>
        </div>

        <div class="config-panel" id="panel-vpn">
            <div class="vpn-link-box" id="vpnLinkText"></div>
            <div class="config-actions" style="margin-top: var(--space-sm);">
                <button class="btn btn-secondary btn-sm" onclick="copyToClipboard(currentVpnLink)" style="flex:1">
                    {{ _('copy_key') }}
                </button>
            </div>
            <div class="form-hint" style="margin-top: var(--space-sm);">
                {{ _('vpn_link_hint') }}
            </div>
        </div>

        <div class="config-panel" id="panel-qr">
            <div class="qr-container">
                <div class="qr-format hidden" id="qrFormat">
                    <button type="button" class="qr-format-btn active" data-fmt="amnezia"
                        onclick="setQrFormat('amnezia')">{{ _('qr_format_amnezia') }}</button>
                    <button type="button" class="qr-format-btn" data-fmt="wireguard"
                        onclick="setQrFormat('wireguard')">{{ _('qr_format_wireguard') }}</button>
                </div>
                <div id="qrCode"></div>
                <div class="qr-hint">{{ _('qr_hint') }}</div>
                <div class="qr-hint" id="qrFormatHint"></div>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block scripts %}
<script>
    let currentConfig = '';
    let currentVpnLink = '';
    let currentConfigName = 'connection';
    let ssOptions = null;
    let allConnections = [];

    function escapeHtml(value) {
        return String(value ?? '').replace(/[&<>"']/g, ch => ({
            '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;'
        }[ch]));
    }

    function escapeJs(value) {
        return String(value ?? '').replace(/[\\'"\n\r<>]/g, ch => ({
            '\\': '\\\\', "'": "\\'", '"': '\\"', '\n': '\\n', '\r': '\\r', '<': '\\x3c', '>': '\\x3e'
        }[ch]));
    }

    function getProtocolLabel(proto, protocolName) {
        if (protocolName) {
            return protocolName;
        }
        return String(proto || '').split('__', 1)[0].toUpperCase() || '—';
    }

    async function loadConnections() {
        const loading = document.getElementById('connectionsLoading');
        const container = document.getElementById('connectionsContainer');
        const empty = document.getElementById('connectionsEmpty');
        const noConn = document.getElementById('noConnectionsState');

        loading.classList.remove('hidden');
        container.classList.add('hidden');
        empty.classList.add('hidden');
        noConn.classList.add('hidden');

        try {
            const data = await apiCall('/api/my/connections');
            allConnections = data.connections || [];
            loading.classList.add('hidden');
            renderConnections();
        } catch (err) {
            loading.classList.add('hidden');
            showToast(`${_('error')}: ` + err.message, 'error');
        }
    }

    function renderConnections() {
        const container = document.getElementById('connectionsContainer');
        const grid = document.getElementById('connectionsGrid');
        const empty = document.getElementById('connectionsEmpty');
        const noConn = document.getElementById('noConnectionsState');

        if (allConnections.length === 0) {
            container.classList.add('hidden');
            noConn.classList.remove('hidden');
            empty.classList.add('hidden');
            return;
        }

        container.classList.remove('hidden');
        noConn.classList.add('hidden');
        empty.classList.add('hidden');

        grid.innerHTML = allConnections.map(c => `
            <div class="client-item entity-card connection-card">
                <div class="client-avatar">🔗</div>
                <div class="entity-card-body">
                    <div class="client-name" style="margin-bottom: 4px;">${escapeHtml(c.name || _('my_connections_title'))}</div>
                    <div class="client-meta" style="display: flex; align-items: center; gap: var(--space-sm); flex-wrap: wrap;">
                        <span>🖥 ${escapeHtml(c.server_name || '—')}</span>
                        <span style="color: var(--text-muted);">${escapeHtml(getProtocolLabel(c.protocol, c.protocol_name))}</span>
                    </div>
                </div>
                <div class="client-actions entity-card-actions">
                <button class="btn btn-secondary btn-sm btn-icon"
                    onclick="showMyConfig('${escapeJs(c.id)}', '${escapeJs(c.name || 'Connection')}', '${escapeJs(c.protocol)}')"
                    title="${_('show_config')}">
                    📄
                </button>
                ${c.created_by === 'self_service'
                    ? `<button class="btn btn-danger btn-sm btn-icon"
                        onclick="deleteConnection('${escapeJs(c.id)}', '${escapeJs(c.name || 'Connection')}')"
                        title="${_('delete_connection')}">${ICON_TRASH}</button>`
                    : ''}
                </div>
            </div>
        `).join('');
    }

    async function loadSelfServiceOptions() {
        try {
            const data = await apiCall('/api/my/connections/options');
            ssOptions = data;
            const controls = document.getElementById('selfServiceControls');
            const disabledMsg = document.getElementById('selfServiceDisabledMsg');

            if (data.enabled && data.servers && data.servers.length > 0) {
                controls.classList.remove('hidden');
                controls.style.display = 'flex';
                disabledMsg.classList.add('hidden');
                document.getElementById('connectionsCounter').textContent =
                    _('connections_counter').replace('{0}', data.remaining_connections).replace('{1}', data.max_connections_per_user);
            } else {
                controls.classList.add('hidden');
                controls.style.display = 'none';
                if (!data.enabled) {
                    disabledMsg.classList.remove('hidden');
                }
            }
        } catch (err) {
            const controls = document.getElementById('selfServiceControls');
            controls.classList.add('hidden');
            controls.style.display = 'none';
        }
    }

    function populateCreateConnServers() {
        const serverSelect = document.getElementById('createConnServer');
        serverSelect.innerHTML = '';
        if (!ssOptions || !ssOptions.servers || ssOptions.servers.length === 0) {
            serverSelect.innerHTML = `<option disabled>${_('no_servers_available')}</option>`;
            return;
        }
        for (const server of ssOptions.servers) {
            const opt = document.createElement('option');
            opt.value = server.id;
            opt.textContent = server.name;
            opt.dataset.protocols = JSON.stringify(server.protocols);
            serverSelect.appendChild(opt);
        }
        updateCreateConnProtocols();
    }

    function updateCreateConnProtocols() {
        const serverSelect = document.getElementById('createConnServer');
        const protoSelect = document.getElementById('createConnProtocol');
        protoSelect.innerHTML = '';

        const selectedOpt = serverSelect.options[serverSelect.selectedIndex];
        if (!selectedOpt || !selectedOpt.dataset.protocols) {
            protoSelect.innerHTML = `<option disabled>${_('loading')}</option>`;
            return;
        }

        const protocols = JSON.parse(selectedOpt.dataset.protocols);
        for (const proto of protocols) {
            const opt = document.createElement('option');
            opt.value = proto.protocol;
            opt.textContent = proto.name;
            protoSelect.appendChild(opt);
        }
    }

    function openCreateConnectionModal() {
        document.getElementById('createConnName').value = '';
        document.getElementById('createConnectionError').textContent = '';
        populateCreateConnServers();
        openModal('createConnectionModal');
        setTimeout(() => document.getElementById('createConnName').focus(), 50);
    }

    async function submitCreateConnection(e) {
        e.preventDefault();
        const errEl = document.getElementById('createConnectionError');
        errEl.textContent = '';

        const serverId = parseInt(document.getElementById('createConnServer').value);
        const protocol = document.getElementById('createConnProtocol').value;
        const name = document.getElementById('createConnName').value.trim();

        if (!name) {
            errEl.textContent = _('name_required') || 'Name is required';
            return false;
        }

        const btn = document.getElementById('createConnBtn');
        const btnText = document.getElementById('createConnBtnText');
        const spinner = document.getElementById('createConnSpinner');

        btn.disabled = true;
        btnText.textContent = _('creating');
        spinner.classList.remove('hidden');

        try {
            const result = await apiCall('/api/my/connections/add', 'POST', {
                server_id: serverId,
                protocol: protocol,
                name: name,
            });

            closeModal('createConnectionModal');

            if (result.config) {
                currentConfig = result.config;
                currentVpnLink = result.vpn_link || '';
                currentConfigName = name.replace(/\s+/g, '_');
                document.getElementById('configModalTitle').textContent = `${_('connection_created')}`;
                document.getElementById('configText').textContent = result.config;
                document.getElementById('vpnLinkText').textContent = currentVpnLink;

                switchConfigTab('conf');
                openModal('configModal');
                generateQR(result.config);
            }

            showToast(_('connection_created').replace('{}', name), 'success');

            await Promise.all([loadSelfServiceOptions(), loadConnections()]);
        } catch (err) {
            errEl.textContent = err.message;
        } finally {
            btn.disabled = false;
            btnText.textContent = _('create');
            spinner.classList.add('hidden');
        }
        return false;
    }

    async function deleteConnection(connectionId, name) {
        if (!confirm(_('delete_connection_confirm'))) return;

        try {
            await apiCall(`/api/my/connections/${connectionId}/delete`, 'POST');
            showToast(_('connection_deleted'), 'success');
            await Promise.all([loadSelfServiceOptions(), loadConnections()]);
        } catch (err) {
            showToast(`${_('error')}: ` + err.message, 'error');
        }
    }

    async function showMyConfig(connectionId, name, proto) {
        try {
            showToast(_('loading_connections'), 'info');
            const result = await apiCall(`/api/my/connections/${connectionId}/config`, 'POST');

            if (result.config) {
                currentConfig = result.config;
                currentVpnLink = result.vpn_link || '';
                currentConfigName = name.replace(/\s+/g, '_');
                document.getElementById('configModalTitle').textContent = `${_('config')} — ${name}`;
                document.getElementById('configText').textContent = result.config;
                document.getElementById('vpnLinkText').textContent = currentVpnLink;

                const vpnTab = document.querySelectorAll('.config-tab')[1];
                const vpnPanel = document.getElementById('panel-vpn');
                if (proto === 'telemt') {
                    vpnTab.style.display = 'none';
                } else {
                    vpnTab.style.display = '';
                }

                switchConfigTab('conf');
                openModal('configModal');
                generateQR(result.config, result.vpn_qr_chunks);
            }
        } catch (err) {
            showToast(`${_('error')}: ` + err.message, 'error');
        }
    }

    function switchConfigTab(tab) {
        document.querySelectorAll('.config-tab').forEach(t => t.classList.remove('active'));
        document.querySelectorAll('.config-panel').forEach(p => p.classList.remove('active'));
        const tabs = document.querySelectorAll('.config-tab');
        const panels = { conf: 'panel-conf', vpn: 'panel-vpn', qr: 'panel-qr' };
        const tabIdx = { conf: 0, vpn: 1, qr: 2 };
        tabs[tabIdx[tab]].classList.add('active');
        document.getElementById(panels[tab]).classList.add('active');
        // the frame series only animates while its panel is on screen
        if (tab === 'qr') { renderQR(); } else { stopQrAnimation(); }
    }

    // The QR shows one of two payloads: Amnezia's own config format, split into
    // the frame series ImportController::parseQrCodeChunk reassembles, or the
    // raw config, which is all AmneziaWG and wg-quick understand. The series
    // exists because a whole config in one code lands at QR version 21-26,
    // while the Android scanner reads 640x480 camera frames and cannot decode
    // anything that dense. Every frame below stays under 55x55 modules.
    const QR_FRAME_MS = 800;

    let currentQrConfig = '';
    let currentQrChunks = [];
    let currentQrFormat = 'amnezia';
    let qrFrame = 0;
    let qrTimer = null;

    function setQrFormat(format) {
        currentQrFormat = format;
        qrFrame = 0;
        renderQR();
    }

    function generateQR(text, chunks) {
        currentQrConfig = text || '';
        currentQrChunks = chunks || [];
        qrFrame = 0;
        renderQR();
    }

    function stopQrAnimation() {
        if (qrTimer) { clearInterval(qrTimer); qrTimer = null; }
    }

    function drawQr(text, size) {
        const container = document.getElementById('qrCode');
        if (!container) return;
        container.innerHTML = '';
        try {
            new QRCode(container, {
                text: text, width: size, height: size,
                colorDark: '#000000', colorLight: '#ffffff',
                correctLevel: QRCode.CorrectLevel.L
            });
        } catch (e) {
            container.innerHTML = `<div style="color:var(--text-muted);font-size:0.85rem;">${_('qr_error')}</div>`;
        }
    }

    function renderQR() {
        stopQrAnimation();
        const named = currentQrFormat === 'amnezia' && currentQrChunks.length > 0;
        const switcher = document.getElementById('qrFormat');
        if (switcher) {
            switcher.classList.toggle('hidden', currentQrChunks.length === 0);
            switcher.querySelectorAll('.qr-format-btn').forEach(b =>
                b.classList.toggle('active', b.dataset.fmt === (named ? 'amnezia' : 'wireguard')));
        }
        const hint = document.getElementById('qrFormatHint');
        if (!named) {
            if (hint) hint.textContent = _('qr_format_wireguard_hint');
            drawQr(currentQrConfig, qrSize(document.getElementById('qrCode') || document.body, 280));
            return;
        }
        const paint = () => {
            drawQr(currentQrChunks[qrFrame], qrSize(document.getElementById('qrCode') || document.body, 300));
            if (hint) {
                hint.textContent = currentQrChunks.length > 1
                    ? `${_('qr_format_amnezia_hint')} ${qrFrame + 1}/${currentQrChunks.length}`
                    : _('qr_format_amnezia_hint');
            }
        };
        paint();
        if (currentQrChunks.length > 1) {
            qrTimer = setInterval(() => {
                // the modal was closed or another tab opened -- offsetParent is
                // null once the panel is off screen, so stop burning a timer
                const container = document.getElementById('qrCode');
                if (!container || !container.offsetParent) { stopQrAnimation(); return; }
                qrFrame = (qrFrame + 1) % currentQrChunks.length;
                paint();
            }, QR_FRAME_MS);
        }
    }

    document.addEventListener('DOMContentLoaded', () => {
        loadSelfServiceOptions();
        loadConnections();
    });
</script>
{% endblock %}