import { NextRequest, NextResponse } from 'next/server';
import { createClient } from '@/lib/supabase/server';

export async function POST(req: NextRequest) {
  try {
    const supabase = await createClient();
    const { data: { user } } = await supabase.auth.getUser();

    if (!user) {
      return NextResponse.json({ error: 'No autorizado. Inicia sesión.' }, { status: 401 });
    }

    const userRole = user.app_metadata?.role || user.user_metadata?.role || 'client';
    if (userRole !== 'admin' && userRole !== 'team') {
      return NextResponse.json({ error: 'Permisos insuficientes. Solo administradores pueden crear clientes.' }, { status: 403 });
    }

    const body = await req.json();
    const { companyName, slug, email, password, role } = body;

    if (!companyName || !slug || !email || !password) {
      return NextResponse.json({ error: 'Todos los campos son obligatorios.' }, { status: 400 });
    }

    const sanitizedSlug = slug.toLowerCase().trim().replace(/[^a-z0-9-]/g, '-');
    const targetRole = role === 'admin' || role === 'team' ? role : 'client';

    const { data, error } = await supabase.rpc('provision_client', {
      p_company_name: companyName.trim(),
      p_slug: sanitizedSlug,
      p_email: email.toLowerCase().trim(),
      p_password: password,
      p_role: targetRole,
    });

    if (error) {
      console.error('Error in provision_client RPC:', error);
      return NextResponse.json({ error: error.message || 'Error al provisionar cliente en base de datos.' }, { status: 500 });
    }

    // Seed integration slots (best-effort; ignore if table missing)
    try {
      const tenantId =
        data?.tenant_id || data?.id || data?.client?.tenant_id || null;
      const serviceKey = process.env.SUPABASE_SERVICE_ROLE_KEY?.trim();
      const url = process.env.NEXT_PUBLIC_SUPABASE_URL || 'https://supabase.4ventures.es';
      if (tenantId && serviceKey) {
        const providers = [
          ['meta_ads', 'Meta Ads'],
          ['google_ads', 'Google Ads (MCC)'],
          ['ga4', 'Google Analytics 4'],
          ['search_console', 'Search Console'],
          ['tag_manager', 'Tag Manager'],
          ['clientify', 'Clientify'],
          ['klaviyo', 'Klaviyo'],
          ['mailchimp', 'Mailchimp'],
          ['google_drive', 'Google Drive'],
          ['wordpress', 'WordPress'],
          ['prestashop', 'PrestaShop'],
          ['shopify', 'Shopify'],
          ['instagram', 'Instagram'],
          ['facebook', 'Facebook Page'],
          ['tiktok', 'TikTok'],
          ['linkedin', 'LinkedIn'],
        ];
        await fetch(`${url}/rest/v1/integrations`, {
          method: 'POST',
          headers: {
            apikey: serviceKey,
            Authorization: `Bearer ${serviceKey}`,
            'Content-Type': 'application/json',
            Prefer: 'resolution=ignore-duplicates',
          },
          body: JSON.stringify(
            providers.map(([provider, label]) => ({
              tenant_id: tenantId,
              provider,
              status: 'disconnected',
              label,
            }))
          ),
        });
      }
    } catch (e) {
      console.warn('seed integrations skipped', e);
    }

    return NextResponse.json({ success: true, client: data });
  } catch (err: any) {
    console.error('Server error creating client:', err);
    return NextResponse.json({ error: err?.message || 'Error interno del servidor.' }, { status: 500 });
  }
}