import { h, PageHeader, Badge, StatusDot, Empty, Card, esc, enc, att_esc, $val, apiFetch, toast, dismissToast, openModal, closeModal, formModal, definePage, hComp, connect, reactive, requestUpdate, Link, createRouter, ToastContainer, render, parseZones } from '/static/hoover/index.js';

async function changeZone(name, zone, state) {
    const r = await apiFetch('/api/firewall/zones/' + enc(zone) + '/interfaces', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ interfaces: [name] }),
    });
    if (r.ok) {
        toast(name + ' \u2192 ' + zone, 'success');
        await load(state);
    } else {
        toast(r.error || 'Failed', 'error');
    }
}

function cfgModal(name, state) {
    openModal((inner, idx) => {
        formModal(inner, 'Config: ' + name,
            [
                { label: 'Addresses (comma-separated)', id: 'cfg-addrs', placeholder: '192.168.1.1/24' },
                { label: 'Gateway', id: 'cfg-gw' },
                { label: 'DNS (comma-separated)', id: 'cfg-dns', placeholder: '1.1.1.1, 8.8.8.8' },
            ],
            [
                { label: 'Cancel', cls: 'btn-outline', action: 'c', handler: () => closeModal(idx) },
                {
                    label: 'Save', cls: 'btn-primary', action: 's', handler: async () => {
                        const body = {
                            addresses: ($val('cfg-addrs') || '').split(',').map(s => s.trim()).filter(Boolean),
                            gateway: ($val('cfg-gw') || '').trim() || undefined,
                            dns: ($val('cfg-dns') || '').split(',').map(s => s.trim()).filter(Boolean),
                        };
                        const r = await apiFetch('/api/network/interfaces/' + enc(name), {
                            method: 'POST',
                            headers: { 'Content-Type': 'application/json' },
                            body: JSON.stringify(body),
                        });
                        if (r.ok) {
                            toast('Config saved', 'success');
                            closeModal(idx);
                            await load(state);
                        } else {
                            toast(r.error || 'Failed', 'error');
                        }
                    },
                },
            ],
        );
    });
}

async function load(state) {
    try {
        const [fw, net] = await Promise.all([
            apiFetch('/api/firewall/zones'),
            apiFetch('/api/network/interfaces'),
        ]);
        // Extract zone names from available zones (for the dropdown)
        state.zones = fw.ok ? (fw.data?.available || []) : [];
        if (net.ok) {
            // Build reverse zone map: interface name → zone name, from active zones
            const ifaceZone = {};
            for (const [zoneName, ifaces] of Object.entries(fw.data?.active || {})) {
                for (const name of (ifaces || [])) ifaceZone[name] = zoneName;
            }
            // Transform { interfaces: { name: { config, runtime } }, timestamp }
            // → array of { name, mac, ips, state, zone }
            const ifacesObj = net.data?.interfaces || {};
            state.ifaces = Object.entries(ifacesObj).map(([name, entry]) => ({
                name,
                mac: entry?.runtime?.mac || null,
                ips: [...(entry?.config?.addresses || []), ...(entry?.runtime?.addresses || [])],
                state: (entry?.runtime?.state || '').startsWith('routable') || (entry?.runtime?.state || '').startsWith('carrier') ? 'up' : 'down',
                zone: ifaceZone[name] || null,
            }));
        } else {
            state.error = net.error;
        }
    } catch (e) {
        state.error = String(e);
    }
    state.loading = false;
}

export default definePage({
    init() {
        return { ifaces: [], zones: [], loading: true, error: null };
    },
    subscribe: ['firewall', 'networkd'],
    load,
    render(state) {
        if (state.loading) {
            return [
                PageHeader({ title: 'Interfaces' }),
                h('div', { class: 'card', key: 'loading' },
                    h('div', { class: 'card-body loading' }, 'Loading...'),
                ),
            ];
        }

        if (state.error) {
            return [
                PageHeader({ title: 'Interfaces' }),
                h('div', { class: 'card', key: 'error' },
                    h('div', { class: 'card-body error-msg' }, state.error),
                ),
            ];
        }

        const rows = state.ifaces.map(iface => {
            return h('tr', { key: iface.name },
                h('td', null, h('strong', null, iface.name)),
                h('td', { class: 'text-muted' }, String(iface.mac || 'N/A')),
                h('td', null, (iface.ips || []).join(', ') || 'N/A'),
                h('td', null,
                    StatusDot({ status: iface.state }),
                    ' ' + (iface.state === 'up' ? 'Up' : 'Down'),
                ),
                h('td', null,
                    h('select', {
                        'on:change': (e) => changeZone(iface.name, e.target.value, state),
                    }, state.zones.map(z =>
                        h('option', { value: z, selected: z === iface.zone }, z),
                    )),
                    h('button', {
                        class: 'btn btn-sm btn-outline',
                        style: 'margin-left:8px',
                        'on:click': () => cfgModal(iface.name, state),
                    }, 'Config'),
                ),
            );
        });

        return [
            PageHeader({ title: 'Interfaces', subtitle: 'Network interface management' }),
            h('div', { class: 'card' },
                h('table', { class: 'table' },
                    h('thead', null,
                        h('tr', null,
                            h('th', null, 'Name'),
                            h('th', null, 'MAC'),
                            h('th', null, 'IPs'),
                            h('th', null, 'State'),
                            h('th', null, 'Zone / Actions'),
                        ),
                    ),
                    h('tbody', null,
                        ...(rows.length ? rows : [
                            h('tr', null,
                                h('td', { colspan: 5, class: 'text-muted text-sm' }, 'No interfaces found'),
                            ),
                        ]),
                    ),
                ),
            ),
        ];
    },
});