import { NextResponse } from 'next/server';
import type { NextRequest } from 'next/server';

export async function middleware(request: NextRequest) {
    const hostname = request.headers.get('host') || '';
    const url = request.nextUrl;

    const apiBase = process.env.API_INTERNAL_URL || 'http://backend:8080';

    // Extrair subdomínio
    const subdomain = hostname.split('.')[0];

    // Se for dash.localhost - rotas administrativas (SUPERADMIN)
    if (subdomain === 'dash') {
        // Permitir acesso a /superadmin, /cadastro, /login
        return NextResponse.next();
    }

    // Se for agência ({subdomain}.localhost) - validar se existe
    if (hostname.includes('.')) {
        try {
            const res = await fetch(`${apiBase}/api/tenant/check?subdomain=${subdomain}`);
            if (!res.ok) {
                const baseHost = hostname.split('.').slice(1).join('.') || hostname;
                const redirectUrl = new URL(url.toString());
                redirectUrl.hostname = baseHost;
                redirectUrl.pathname = '/';
                return NextResponse.redirect(redirectUrl);
            }
        } catch (err) {
            const baseHost = hostname.split('.').slice(1).join('.') || hostname;
            const redirectUrl = new URL(url.toString());
            redirectUrl.hostname = baseHost;
            redirectUrl.pathname = '/';
            return NextResponse.redirect(redirectUrl);
        }
    }

    // Permitir /dashboard, /login, /clientes, etc.
    return NextResponse.next();
}

export const config = {
    matcher: [
        /*
         * Match all request paths except for the ones starting with:
         * - api (API routes)
         * - _next/static (static files)
         * - _next/image (image optimization files)
         * - favicon.ico (favicon file)
         */
        '/((?!api|_next/static|_next/image|favicon.ico).*)',
    ],
};