import { html, PageHeader, Badge, Empty, ConfirmDelete, renderGuard, enc, esc, $val, definePage, getModel, MultiSelectModal, QuickModal, PendingDot, fwDirty, fwInfo, fwTitle } from '/static/hoover/index.js';

// Services shown by default in the service picker. Everything else is only
// visible with the "Show all options" toggle (or while it is already
// selected on the zone).
const COMMON_SERVICES = [
    'amqp', 'cron', 'docker', 'ftp', 'ftps', 'http', 'https', 'irc', 'ldap',
    'mysql', 'nfs', 'ntp', 'postgresql', 'radius', 'rsync', 'sip', 'smtp',
    'smtps', 'snmp', 'ssh', 'telnet', 'vnc', 'xmpp',
];

const addZone = QuickModal({
    title: 'Add Zone',
    fields: [
        { label: 'Zone name', id: 'zone-name', placeholder: 'e.g. internal' },
        { label: 'Target', id: 'zone-target', placeholder: 'default (usually leave as default)' },
    ],
    submit: {
        url: '/api/firewall/zones',
        body: () => ({ name: ($val('zone-name') || '').trim(), target: ($val('zone-target') || '').trim() || 'default' }),
        validate: (b) => !b.name ? 'Zone name required' : null,
        successMsg: 'Zone created',
    },
});

export default definePage({
    init() {
        return {
            firewall: getModel('firewall'),
        };
    },
    render(state) {
        const guard = renderGuard(state.firewall, 'Zones', 'Firewall zones', state.firewall.data?.zones);
        if (guard) return guard;

        const fw = fwDirty(state.firewall.data?.pending);

        // Live zone data (parsed `--list-all-zones`): carries interfaces,
        // services, target, and masquerade for every defined zone.
        const liveZones = state.firewall.data?.zones || {};
        const zoneDetails = {};
        for (const name of Object.keys(liveZones)) {
            zoneDetails[name] = liveZones[name] || { interfaces: [] };
        }

        const zoneCards = Object.entries(zoneDetails).map(([name, zdata]) => {
            const z = typeof zdata === 'object' ? zdata : {};
            const ifacesArr = Array.isArray(z.interfaces) ? z.interfaces : [];
            const svcsArr = Array.isArray(z.services) ? z.services : [];
            const info = fwInfo(fw, name);
            const ifTitle = fwTitle(fw, name, 'interfaces');
            const svcTitle = fwTitle(fw, name, 'services');
            const tgtTitle = fwTitle(fw, name, 'target');
            return html`<div class="card ${info.class}" title=${info.title || undefined} key=${name} style="position:relative">
                <div style="display:flex;justify-content:space-between;align-items:flex-start">
                    <div>
                        <h3 style="font-size:16px;color:var(--accent)">${info.dirty ? PendingDot({}) : ''}${name}</h3>
                        <div class="text-muted text-sm" title=${tgtTitle || undefined} style="margin-bottom:10px">
                            ${z.target ? 'Target: ' + esc(z.target) : ''}
                        </div>
                    </div>
                </div>
                <div class="text-sm mb-4" title=${ifTitle || undefined}>
                    <div class="text-muted" style="margin-bottom:4px">Interfaces</div>
                    ${ifacesArr.length
                        ? ifacesArr.map(i => html`<${Badge} text=${esc(i)} />`)
                        : html`<span class="text-muted">None</span>`}
                </div>
                <div class="text-sm mb-4" title=${svcTitle || undefined}>
                    <div class="text-muted" style="margin-bottom:4px">Services</div>
                    ${svcsArr.length
                        ? svcsArr.map(s => html`<${Badge} text=${esc(s)} variant="success" />`)
                        : html`<span class="text-muted">None</span>`}
                </div>
                <div style="display:flex;gap:6px">
                    <button class="btn btn-sm btn-outline"
                        onClick=${() => MultiSelectModal({
                            title: 'Interfaces: ' + name,
                            url: '/api/firewall/zones/' + enc(name) + '/interfaces',
                            options: (state.firewall.data?.interfaces || []).map(i => i.name),
                            selected: ifacesArr,
                            fieldKey: 'interfaces',
                            successMsg: 'Interfaces updated',
                            confirm: (b) => {
                                const next = (b && b.interfaces) || [];
                                const coveredElsewhere = new Set();
                                for (const [zn, zd] of Object.entries(liveZones)) {
                                    if (zn === name) continue;
                                    const other = zd && Array.isArray(zd.interfaces)
                                        ? zd.interfaces : [];
                                    for (const i of other) coveredElsewhere.add(i);
                                }
                                const dropped = ifacesArr.filter(
                                    i => !next.includes(i) && !coveredElsewhere.has(i));
                                if (dropped.length) {
                                    return 'Removing ' + dropped.join(', ') + ' from this ' +
                                        'zone leaves it in no firewall zone. Clients on ' +
                                        'that segment will lose all connectivity, ' +
                                        'including DHCP, until the interface is added ' +
                                        'to another zone.\n\nRemove it anyway?';
                                }
                                return null;
                            },
                        })()}>Interfaces</button>
                    <button class="btn btn-sm btn-outline"
                        onClick=${() => MultiSelectModal({
                            title: 'Services: ' + name,
                            url: '/api/firewall/zones/' + enc(name) + '/services',
                            options: state.firewall.data?.available_services || [],
                            descriptions: state.firewall.data?.service_descriptions || {},
                            common: COMMON_SERVICES,
                            selected: svcsArr,
                            fieldKey: 'services',
                            successMsg: 'Services updated',
                            confirm: (b) => {
                                const svcs = (b && b.services) || [];
                                const isDefault = name === state.firewall.data?.default_zone;
                                if (isDefault && !svcs.includes('https') && !svcs.includes('ssh')) {
                                    return 'This removes both HTTPS and SSH from the default zone ' +
                                        "'" + name + "'. Management access and remote recovery " +
                                        'through this zone will be blocked until you reach the ' +
                                        'appliance via console or another route.\n\nRemove them anyway?';
                                }
                                return null;
                            },
                        })()}>Services</button>
                    <${ConfirmDelete}
                        url=${'/api/firewall/zones/' + enc(name)}
                        deleteKey=${name}
                        message=${'Delete zone ' + name + '?'}
                        success=${'Zone ' + name + ' deleted'}
                        label="Delete" />
                </div>
            </div>`;
        });

        const uncovered = Array.isArray(state.firewall.data?.uncovered_interfaces)
            ? state.firewall.data.uncovered_interfaces
            : [];
        const uncoveredBanner = uncovered.length ? html`<div class="card"
            style="border-left:3px solid var(--danger)">
            <div class="card-body">
                <div class="text-danger" style="font-weight:600;margin-bottom:8px">
                    Uncovered interfaces
                </div>
                <div class="text-muted text-sm" style="margin-bottom:10px">
                    These interfaces are not assigned to any firewall zone, so clients
                    on these segments lose all connectivity, including DHCP. Add each
                    interface to a zone to restore access.
                </div>
                <div>${uncovered.map(i => html`<${Badge} text=${esc(i)} variant="danger" />`)}</div>
            </div>
        </div>` : null;

        return [
            PageHeader({
                title: 'Zones',
                subtitle: 'Firewall zones',
                actions: html`<button class="btn btn-primary"
                    onClick=${() => addZone()}>Add Zone</button>`,
            }),
            uncoveredBanner,
            zoneCards.length
                ? html`<div class="card-grid">${zoneCards}</div>`
                : Empty({ text: 'No zones configured. Add a zone to get started.' }),
        ];
    },
});