import { h, render, Link, hComp, ToastContainer, connect, apiFetch, modelRegister, modelFetch, reactive, initAuth, getAuthToken, checkSession } from '/static/hoover/index.js';

import DashboardPage from '/static/pages/dashboard.js';
import InterfacesPage from '/static/pages/interfaces.js';
import ZonesPage from '/static/pages/zones.js';
import RulesPage from '/static/pages/rules.js';
import NatPage from '/static/pages/nat.js';
import DhcpPage from '/static/pages/dhcp.js';
import ProxyPage from '/static/pages/proxy.js';
import BackendsPage from '/static/pages/backends.js';
import CertsPage from '/static/pages/certs.js';
import WireguardPage from '/static/pages/wireguard.js';
import LogsPage from '/static/pages/logs.js';
import NotFoundPage from '/static/pages/notfound.js';
import LoginPage from '/static/pages/login.js';
import PasskeysPage from '/static/pages/passkeys.js';
import UsersPage from '/static/pages/users.js';

/* ── Navigation items ──────────────────────────────────────── */
const _NavBase = [
    { path: '/dashboard',  label: 'Dashboard'  },
    { path: '/interfaces', label: 'Interfaces' },
    { path: '/zones',      label: 'Zones'      },
    { path: '/rules',      label: 'Rules'      },
    { path: '/nat',        label: 'NAT'        },
    { path: '/dhcp',       label: 'DHCP'       },
    { path: '/proxy',      label: 'Proxy'      },
    { path: '/backends',   label: 'Backends'   },
    { path: '/certs',      label: 'Certs'      },
    { path: '/wireguard',  label: 'WireGuard'  },
    { path: '/logs',       label: 'Logs'       },
];

function getNav() {
    const nav = [..._NavBase];
    const perms = JSON.parse(sessionStorage.getItem('vw:permissions') || 'null');
    if (perms && perms.auth === 'rw') {
        nav.push({ path: '/users', label: 'Users' });
    }
    return nav;
}

modelRegister('firewall', {
    subsystem: 'firewall',
    fetch: async () => {
        const [cfg, zones, services, interfaces, state] = await Promise.allSettled([
            apiFetch('/api/firewall/config'),
            apiFetch('/api/firewall/zones'),
            apiFetch('/api/firewall/services'),
            apiFetch('/api/firewall/interfaces'),
            apiFetch('/api/firewall/state'),
        ]);
        const result = {};
        if (cfg.status === 'fulfilled' && cfg.value.ok) result.config = cfg.value.data || {};
        else if (cfg.status === 'rejected' || !cfg.value.ok) throw new Error(cfg.status === 'rejected' ? (cfg.reason?.message || 'Failed') : (cfg.value.error || 'Failed'));
        if (zones.status === 'fulfilled' && zones.value.ok) result.zones = zones.value.data || {};
        else if (zones.status === 'rejected' || !zones.value.ok) throw new Error(zones.status === 'rejected' ? (zones.reason?.message || 'Failed') : (zones.value.error || 'Failed'));
        if (services.status === 'fulfilled' && services.value.ok) result.services = services.value.data || [];
        else if (services.status === 'rejected' || !services.value.ok) throw new Error(services.status === 'rejected' ? (services.reason?.message || 'Failed') : (services.value.error || 'Failed'));
        if (interfaces.status === 'fulfilled' && interfaces.value.ok) result.interfaces = interfaces.value.data || [];
        else if (interfaces.status === 'rejected' || !interfaces.value.ok) throw new Error(interfaces.status === 'rejected' ? (interfaces.reason?.message || 'Failed') : (interfaces.value.error || 'Failed'));
        if (state.status === 'fulfilled' && state.value.ok) result.state = state.value.data || {};
        return result;
    },
});

modelRegister('network', {
    subsystem: 'networkd',
    fetch: async () => {
        const r = await apiFetch('/api/network/interfaces');
        if (!r.ok) throw new Error(r.error);
        return r.data || { interfaces: {} };
    },
});

modelRegister('dnsmasq', {
    subsystem: 'dnsmasq',
    fetch: async () => {
        const [cfg, status, leases] = await Promise.allSettled([
            apiFetch('/api/dhcp/config'),
            apiFetch('/api/dhcp/status'),
            apiFetch('/api/dhcp/leases'),
        ]);
        const result = {};
        if (cfg.status === 'fulfilled' && cfg.value.ok) result.config = cfg.value.data || {};
        else if (cfg.status === 'rejected' || !cfg.value.ok) throw new Error(cfg.status === 'rejected' ? (cfg.reason?.message || 'Failed') : (cfg.value.error || 'Failed'));
        if (status.status === 'fulfilled' && status.value.ok) result.status = status.value.data || {};
        else if (status.status === 'rejected' || !status.value.ok) throw new Error(status.status === 'rejected' ? (status.reason?.message || 'Failed') : (status.value.error || 'Failed'));
        if (leases.status === 'fulfilled' && leases.value.ok) result.leases = leases.value.data || [];
        else if (leases.status === 'rejected' || !leases.value.ok) throw new Error(leases.status === 'rejected' ? (leases.reason?.message || 'Failed') : (leases.value.error || 'Failed'));
        return result;
    },
});

modelRegister('nginx', {
    subsystem: 'nginx',
    fetch: async () => {
        const r = await apiFetch('/api/proxy/domains');
        if (!r.ok) throw new Error(r.error);
        return { domains: r.data || [] };
    },
});

modelRegister('backends', {
    subsystem: 'nginx',
    fetch: async () => {
        const r = await apiFetch('/api/proxy/backends');
        if (!r.ok) throw new Error(r.error);
        return r.data || {};
    },
});

modelRegister('acme', {
    subsystem: 'acme',
    fetch: async () => {
        const [listR, acctR] = await Promise.allSettled([
            apiFetch('/api/certs/list'),
            apiFetch('/api/certs/account'),
        ]);
        const result = {};
        if (listR.status === 'fulfilled' && listR.value.ok) {
            result.certs = listR.value.data || [];
        } else if (listR.status === 'rejected' || !listR.value.ok) {
            throw new Error(listR.status === 'rejected' ? (listR.reason?.message || 'Failed') : (listR.value.error || 'Failed'));
        }
        if (acctR.status === 'fulfilled' && acctR.value.ok) {
            result.account = acctR.value.data || { registered: false, email: '', ca: '' };
        }
        return result;
    },
});

modelRegister('wireguard', {
    subsystem: 'wireguard',
    fetch: async () => {
        const [stR, pR, cfgR] = await Promise.allSettled([
            apiFetch('/api/wireguard/status'),
            apiFetch('/api/wireguard/peers'),
            apiFetch('/api/wireguard/config'),
        ]);
        const result = {};
        if (stR.status === 'fulfilled' && stR.value.ok) result.status = stR.value.data || {};
        else if (stR.status === 'rejected' || !stR.value.ok) throw new Error(stR.status === 'rejected' ? (stR.reason?.message || 'Failed') : (stR.value.error || 'Failed'));
        if (pR.status === 'fulfilled' && pR.value.ok) result.peers = pR.value.data || [];
        else if (pR.status === 'rejected' || !pR.value.ok) throw new Error(pR.status === 'rejected' ? (pR.reason?.message || 'Failed') : (pR.value.error || 'Failed'));
        if (cfgR.status === 'fulfilled' && cfgR.value.ok) result.config = cfgR.value.data || {};
        return result;
    },
});

const LOG_TABS = {
    journal: '/api/logs/journal',
    'nginx-access': '/api/logs/nginx/access',
    'nginx-error': '/api/logs/nginx/error',
    dnsmasq: '/api/logs/dnsmasq',
    app: '/api/logs/app',
};

modelRegister('logs', {
    subsystem: '*',
    fetch: async (signal, tab) => {
        const tabKey = tab || 'journal';
        const url = LOG_TABS[tabKey];
        if (!url) throw new Error('Unknown log tab: ' + tabKey);
        const r = await apiFetch(url, { signal });
        if (!r.ok) throw new Error(r.error);
        return { data: (r.data || '').split('\n').filter(l => l.length > 0), tab: tabKey };
    },
});

modelRegister('status', {
    subsystem: '*',
    fetch: async () => {
        const [pendingR, metricsR] = await Promise.allSettled([
            apiFetch('/api/status/pending'),
            apiFetch('/api/status/system-metrics'),
        ]);
        const result = {};
        if (pendingR.status === 'fulfilled' && pendingR.value.ok) {
            result.pending = pendingR.value.data || {};
        }
        if (metricsR.status === 'fulfilled' && metricsR.value.ok) {
            result.metrics = metricsR.value.data || {};
        }
        return result;
    },
});

/* ── Initial fetch (after auth check) ───────────────────────── */
function fetchInitialData() {
    for (const name of ['firewall', 'network', 'dnsmasq', 'nginx', 'backends', 'wireguard', 'acme', 'status']) {
        modelFetch(name);
    }
    modelFetch('logs', 'journal');
}

/* ── Page map ──────────────────────────────────────────────── */
const Pages = {
    login:       LoginPage,
    dashboard:   DashboardPage,
    interfaces:  InterfacesPage,
    zones:       ZonesPage,
    rules:       RulesPage,
    nat:         NatPage,
    dhcp:        DhcpPage,
    proxy:       ProxyPage,
    backends:    BackendsPage,
    certs:       CertsPage,
    wireguard:   WireguardPage,
    logs:        LogsPage,
    passkeys:    PasskeysPage,
    users:       UsersPage,
};

/* ── Router ────────────────────────────────────────────────── */
const router = {
    state: reactive({ path: location.hash.slice(1) || '/dashboard' }),
    isAuthenticated: false,
    component() {
        const name = this.state.path.replace(/^\//, '');
        const page = Pages[name] || NotFoundPage;
        return hComp(page, this.state.path);
    },
};

window.location.hash || (window.location.hash = router.state.path);
window.addEventListener('hashchange', () => {
    router.state.path = location.hash.slice(1) || '/dashboard';
});

/* ── Sidebar render root ───────────────────────────────────── */
function Sidebar() {
    const current = router.state.path;
    const nav = getNav();
    return h('div', { class: 'sidebar' },
        h('div', { class: 'logo' }, 'Vacuum Wall'),
        h('nav', null,
            nav.map(item =>
                Link({
                    path: item.path,
                    class: current === item.path ? 'active' : '',
                    children: [item.label],
                }),
            ),
        ),
    );
}

/* ── Main content render root ──────────────────────────────── */
function MainContent() {
    return [
        router.component(),
        ToastContainer(),
    ];
}

/* ── Init ──────────────────────────────────────────────────── */
export async function initApp() {
    const sidebarEl = document.getElementById('sidebar');
    const mainEl = document.getElementById('main');
    if (sidebarEl && mainEl) {
        render(sidebarEl, Sidebar);
        render(mainEl, MainContent);
    }

    // Listen for login events to update router state after auth
    window.addEventListener('auth:login', () => {
        router.isAuthenticated = true;
        if (!router.state.path.startsWith('/login')) {
            fetchInitialData();
        }
    });

    // Check auth state before connecting WS
    const ok = await initAuth();
    if (ok) {
        router.isAuthenticated = true;
        fetchInitialData();
        setTimeout(connect, 0);
    } else {
        // No valid session — redirect to login
        if (router.state.path !== '/login') {
            window.location.hash = '/login';
        }
    }
}

if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', initApp);
} else {
    initApp();
}