{% extends "base.html" %}

{% block title_extra %} — {{ _('invites_title') }}{% endblock %}

{% block content %}
<section>
    <div style="display:flex; align-items:flex-end; justify-content:space-between; gap:var(--space-md); flex-wrap:wrap; margin-bottom:var(--space-lg);">
        <div>
            <h1 class="section-title" style="margin-bottom:var(--space-xs);">
                <span class="icon">🔗</span>
                {{ _('invites_title') }}
            </h1>
            <p style="color:var(--text-muted); margin:0; max-width:42rem; line-height:1.45;">{{ _('invites_hint') }}</p>
        </div>
        <button class="btn btn-primary" onclick="openCreateInvite()">
            <span>＋</span> {{ _('invite_create') }}
        </button>
    </div>

    <div id="invitesEmpty" class="empty-state {% if invites %}hidden{% endif %}">
        <div class="empty-icon">🔗</div>
        <div class="empty-title">{{ _('invites_empty') }}</div>
        <div class="empty-desc">{{ _('invites_empty_desc') }}</div>
    </div>

    <div id="invitesGrid" style="display:{% if invites %}grid{% else %}none{% endif %}; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: var(--space-md);">
        {% for inv in invites %}
        <div class="card invite-card" id="invite-{{ inv.id }}" style="padding:var(--space-md); {% if not inv.enabled %}opacity:0.55;{% endif %}">
            <div style="display:flex; justify-content:space-between; gap:var(--space-sm); align-items:flex-start; margin-bottom:var(--space-sm);">
                <div>
                    <div style="font-weight:700; font-size:1.05rem;">{{ inv.name }}</div>
                    <div style="font-size:0.8rem; color:var(--text-muted); margin-top:2px;">
                        {{ inv.protocol }}
                    </div>
                </div>
                {% if inv.available %}
                <span class="badge badge-success">{{ _('invite_active') }}</span>
                {% elif inv.exhausted %}
                <span class="badge badge-warn">{{ _('invite_exhausted') }}</span>
                {% else %}
                <span class="badge badge-secondary">{{ _('disabled') }}</span>
                {% endif %}
            </div>

            <div style="display:grid; grid-template-columns:1fr 1fr; gap:var(--space-sm); margin-bottom:var(--space-md);">
                <div style="background:var(--bg-primary); border-radius:var(--radius-md); padding:var(--space-sm);">
                    <div style="font-size:0.7rem; color:var(--text-muted); text-transform:uppercase; letter-spacing:0.04em;">{{ _('invite_uses') }}</div>
                    <div style="font-weight:700; margin-top:2px;">
                        {% if inv.unlimited %}{{ inv.used_count }} / ∞{% else %}{{ inv.used_count }} / {{ inv.max_uses }}{% endif %}
                    </div>
                </div>
                <div style="background:var(--bg-primary); border-radius:var(--radius-md); padding:var(--space-sm);">
                    <div style="font-size:0.7rem; color:var(--text-muted); text-transform:uppercase; letter-spacing:0.04em;">{{ _('invite_duration_short') }}</div>
                    <div style="font-weight:700; margin-top:2px;">
                        {% if inv.duration_days %}{{ inv.duration_days }} {{ _('days_short') }}{% else %}∞{% endif %}
                    </div>
                </div>
            </div>

            <div style="display:flex; gap:var(--space-xs); flex-wrap:wrap;">
                <button class="btn btn-primary btn-sm" onclick="copyInviteUrl('{{ inv.token }}')">📋 {{ _('copy') }}</button>
                <button class="btn btn-secondary btn-sm" onclick="editInvite('{{ inv.id }}')">✏️</button>
                <button class="btn btn-secondary btn-sm" onclick="toggleInvite('{{ inv.id }}', {{ 'false' if inv.enabled else 'true' }})">
                    {% if inv.enabled %}⏸{% else %}▶️{% endif %}
                </button>
                <button class="btn btn-danger btn-sm" onclick="deleteInvite('{{ inv.id }}')">🗑</button>
            </div>
        </div>
        {% endfor %}
    </div>
</section>

<div class="modal-backdrop" id="inviteModal">
    <div class="modal" style="max-width: 560px;">
        <div class="modal-header">
            <h2 class="modal-title" id="inviteModalTitle">{{ _('invite_create') }}</h2>
            <button class="modal-close" onclick="closeModal('inviteModal')">×</button>
        </div>

        <input type="hidden" id="inviteEditId" value="">

        <div class="form-group">
            <label class="form-label">{{ _('invite_name_label') }}</label>
            <input class="form-input" type="text" id="inviteName" placeholder="Promo / Friends">
        </div>

        <div style="display:grid; grid-template-columns:1fr 1fr; gap:var(--space-md);">
            <div class="form-group">
                <label class="form-label">{{ _('invite_max_uses_label') }}</label>
                <input class="form-input" type="number" id="inviteMaxUses" min="0" value="1">
                <div class="form-hint">{{ _('invite_max_uses_hint') }}</div>
            </div>
            <div class="form-group">
                <label class="form-label">{{ _('invite_duration_label') }}</label>
                <input class="form-input" type="number" id="inviteDurationDays" min="0" value="0">
                <div class="form-hint">{{ _('invite_duration_hint') }}</div>
            </div>
        </div>

        <div class="form-group">
            <label class="form-label">{{ _('invite_user_label') }}</label>
            <select class="form-select" id="inviteUserId">
                <option value="">{{ _('guest_user_none') }}</option>
                {% for u in users %}
                <option value="{{ u.id }}">{{ u.username }} ({{ u.role }})</option>
                {% endfor %}
            </select>
            <div class="form-hint">{{ _('invite_user_hint') }}</div>
        </div>

        <div class="form-group">
            <label class="form-label">{{ _('protocol_label') }}</label>
            <select class="form-select" id="inviteProtocol">
                {% for s in servers %}
                {% set server_idx = loop.index0 %}
                {% for key, info in (s.protocols or {}).items() %}
                {% if info.installed and key.split('__')[0] in ['awg','awg2','awg_legacy','xray','wireguard','telemt'] %}
                <option value="{{ key }}|{{ server_idx }}">{{ s.name or s.host }} — {{ key }}</option>
                {% endif %}
                {% endfor %}
                {% endfor %}
            </select>
        </div>

        <div class="form-group">
            <label class="form-label">{{ _('invite_password_label') }}</label>
            <input class="form-input" type="password" id="invitePassword" placeholder="{{ _('share_password_hint') }}" autocomplete="new-password">
            <label style="display:none; align-items:center; gap:var(--space-sm); margin-top:var(--space-xs); cursor:pointer;" id="inviteClearPwdWrap">
                <input type="checkbox" id="inviteClearPassword"> {{ _('guest_clear_password') }}
            </label>
        </div>

        <div class="form-group">
            <label class="form-label">{{ _('invite_note_label') }}</label>
            <input class="form-input" type="text" id="inviteNote" placeholder="{{ _('invite_note_placeholder') }}">
        </div>

        <div class="form-group" id="inviteResetUsedWrap" style="display:none;">
            <label style="display:flex; align-items:center; gap:var(--space-sm); cursor:pointer;">
                <input type="checkbox" id="inviteResetUsed"> {{ _('invite_reset_used') }}
            </label>
        </div>

        <div class="modal-footer" style="display:flex; gap:var(--space-sm); justify-content:flex-end;">
            <button class="btn btn-secondary" onclick="closeModal('inviteModal')">{{ _('cancel') }}</button>
            <button class="btn btn-primary" onclick="saveInvite()" id="inviteSaveBtn">
                <span id="inviteSaveText">{{ _('save') }}</span>
                <div class="spinner hidden" id="inviteSaveSpinner" style="width:14px;height:14px;"></div>
            </button>
        </div>
    </div>
</div>

<script>
    const invitesData = {{ invites | tojson }};

    function inviteUrl(token) {
        return `${window.location.origin}/invite/${token}`;
    }

    function copyInviteUrl(token) {
        copyToClipboard(inviteUrl(token));
        showToast(_('copied'), 'success');
    }

    function parseProtocolValue() {
        const raw = document.getElementById('inviteProtocol').value;
        if (raw.includes('|')) {
            const [protocol, sid] = raw.split('|');
            return { protocol, server_id: parseInt(sid || '0') };
        }
        return { protocol: raw, server_id: 0 };
    }

    function setProtocolSelect(protocol, serverId) {
        const sel = document.getElementById('inviteProtocol');
        const want = `${protocol}|${serverId || 0}`;
        if ([...sel.options].some(o => o.value === want)) sel.value = want;
        else if (sel.options.length) sel.value = sel.options[0].value;
    }

    function openCreateInvite() {
        document.getElementById('inviteEditId').value = '';
        document.getElementById('inviteModalTitle').textContent = _('invite_create');
        document.getElementById('inviteName').value = '';
        document.getElementById('inviteMaxUses').value = '1';
        document.getElementById('inviteDurationDays').value = '0';
        document.getElementById('inviteUserId').value = '';
        document.getElementById('invitePassword').value = '';
        document.getElementById('inviteNote').value = '';
        document.getElementById('inviteClearPwdWrap').style.display = 'none';
        document.getElementById('inviteResetUsedWrap').style.display = 'none';
        setProtocolSelect('awg', 0);
        openModal('inviteModal');
    }

    function editInvite(id) {
        const inv = invitesData.find(x => x.id === id);
        if (!inv) return;
        document.getElementById('inviteEditId').value = id;
        document.getElementById('inviteModalTitle').textContent = _('invite_edit');
        document.getElementById('inviteName').value = inv.name || '';
        document.getElementById('inviteMaxUses').value = String(inv.max_uses ?? 1);
        document.getElementById('inviteDurationDays').value = String(inv.duration_days ?? 0);
        document.getElementById('inviteUserId').value = inv.user_id || '';
        document.getElementById('invitePassword').value = '';
        document.getElementById('inviteNote').value = inv.note || '';
        document.getElementById('inviteClearPwdWrap').style.display = inv.has_password ? 'flex' : 'none';
        document.getElementById('inviteClearPassword').checked = false;
        document.getElementById('inviteResetUsedWrap').style.display = 'block';
        document.getElementById('inviteResetUsed').checked = false;
        setProtocolSelect(inv.protocol || 'awg', inv.server_id || 0);
        openModal('inviteModal');
    }

    async function saveInvite() {
        const btn = document.getElementById('inviteSaveBtn');
        const spinner = document.getElementById('inviteSaveSpinner');
        btn.disabled = true;
        spinner.classList.remove('hidden');
        try {
            const editId = document.getElementById('inviteEditId').value;
            const proto = parseProtocolValue();

            const body = {
                name: document.getElementById('inviteName').value || 'Invite',
                max_uses: parseInt(document.getElementById('inviteMaxUses').value || '1'),
                duration_days: parseInt(document.getElementById('inviteDurationDays').value || '0'),
                user_id: document.getElementById('inviteUserId').value || '',
                protocol: proto.protocol,
                server_id: proto.server_id,
                note: document.getElementById('inviteNote').value || '',
            };
            const pwd = document.getElementById('invitePassword').value;
            if (pwd) body.password = pwd;
            if (!body.user_id) throw new Error(_('invite_user_required'));

            if (editId) {
                body.clear_password = document.getElementById('inviteClearPassword').checked;
                body.reset_used = document.getElementById('inviteResetUsed').checked;
                await apiCall(`/api/invites/${editId}`, 'PUT', body);
                showToast(_('invite_updated'), 'success');
            } else {
                const res = await apiCall('/api/invites', 'POST', body);
                showToast(_('invite_created'), 'success');
                if (res.url) copyToClipboard(window.location.origin + res.url);
            }
            closeModal('inviteModal');
            setTimeout(() => window.location.reload(), 600);
        } catch (err) {
            showToast(`${_('error')}: ${err.message}`, 'error');
        } finally {
            btn.disabled = false;
            spinner.classList.add('hidden');
        }
    }

    async function toggleInvite(id, enabled) {
        try {
            await apiCall(`/api/invites/${id}`, 'PUT', { enabled });
            showToast(_('invite_updated'), 'success');
            setTimeout(() => window.location.reload(), 400);
        } catch (err) {
            showToast(`${_('error')}: ${err.message}`, 'error');
        }
    }

    async function deleteInvite(id) {
        if (!confirm(_('invite_delete_confirm'))) return;
        try {
            await apiCall(`/api/invites/${id}`, 'DELETE');
            showToast(_('invite_deleted'), 'success');
            setTimeout(() => window.location.reload(), 400);
        } catch (err) {
            showToast(`${_('error')}: ${err.message}`, 'error');
        }
    }
</script>
{% endblock %}