import { NextRequest, NextResponse } from 'next/server';
import { createClient } from '@/lib/supabase/server';
import {
  isAgencyRole,
  serviceHeaders,
  supabaseUrl,
  userRole,
} from '@/lib/agency';
import type { TenantSettings } from '@/lib/tenant-modules';

export const dynamic = 'force-dynamic';

async function requireAgency() {
  const supabase = await createClient();
  const {
    data: { user },
  } = await supabase.auth.getUser();
  if (!user) {
    return { error: NextResponse.json({ error: 'Unauthorized' }, { status: 401 }) };
  }
  if (!isAgencyRole(userRole(user))) {
    return { error: NextResponse.json({ error: 'Forbidden' }, { status: 403 }) };
  }
  const headers = serviceHeaders();
  if (!headers) {
    return {
      error: NextResponse.json({ error: 'no service role' }, { status: 503 }),
    };
  }
  return { headers };
}

/** GET ?tenantId= — full ficha payload */
export async function GET(req: NextRequest) {
  const gate = await requireAgency();
  if ('error' in gate && gate.error) return gate.error;
  const { headers } = gate as {
    headers: { apikey: string; Authorization: string };
  };

  const tenantId = req.nextUrl.searchParams.get('tenantId')?.trim() || '';
  if (!tenantId) {
    return NextResponse.json({ error: 'tenantId requerido' }, { status: 400 });
  }

  const base = supabaseUrl();
  const [tRes, iRes] = await Promise.all([
    fetch(
      `${base}/rest/v1/tenants?id=eq.${encodeURIComponent(tenantId)}&select=id,name,slug,logo_url,settings,agency_followed,agency_notes,created_at`,
      { headers, cache: 'no-store' }
    ),
    fetch(
      `${base}/rest/v1/integrations?tenant_id=eq.${encodeURIComponent(tenantId)}&select=provider,status,enabled,external_account_id,label,last_sync_at,error_message,meta`,
      { headers, cache: 'no-store' }
    ),
  ]);

  if (!tRes.ok) {
    const msg = await tRes.text();
    return NextResponse.json(
      {
        error: msg.includes('logo_url') || msg.includes('settings')
          ? 'Aplicar sql/tenant_ficha.sql'
          : msg.slice(0, 300),
      },
      { status: 500 }
    );
  }

  const tenants = await tRes.json();
  const tenant = tenants[0];
  if (!tenant) {
    return NextResponse.json({ error: 'Cliente no encontrado' }, { status: 404 });
  }

  let integrations: unknown[] = [];
  let integWarning: string | null = null;
  if (iRes.ok) {
    integrations = await iRes.json();
  } else {
    integWarning = (await iRes.text()).slice(0, 200);
  }

  return NextResponse.json({
    tenant: {
      id: tenant.id,
      name: tenant.name,
      slug: tenant.slug,
      logoUrl: tenant.logo_url || null,
      settings: (tenant.settings || {}) as TenantSettings,
      followed: tenant.agency_followed !== false,
      notes: tenant.agency_notes || '',
      createdAt: tenant.created_at,
    },
    integrations,
    warning: integWarning,
  });
}

/** PATCH — follow/notes + ficha fields (name, logoUrl, settings). */
export async function PATCH(req: NextRequest) {
  const gate = await requireAgency();
  if ('error' in gate && gate.error) return gate.error;
  const { headers } = gate as {
    headers: { apikey: string; Authorization: string };
  };

  const body = await req.json().catch(() => ({}));
  const tenantId =
    typeof body.tenantId === 'string' ? body.tenantId.trim() : '';
  if (!tenantId) {
    return NextResponse.json({ error: 'tenantId requerido' }, { status: 400 });
  }

  const patch: Record<string, unknown> = {};
  if (typeof body.followed === 'boolean') {
    patch.agency_followed = body.followed;
  }
  if (typeof body.notes === 'string') {
    patch.agency_notes = body.notes.trim() || null;
  }
  if (typeof body.name === 'string' && body.name.trim()) {
    patch.name = body.name.trim();
  }
  if (typeof body.logoUrl === 'string') {
    patch.logo_url = body.logoUrl.trim() || null;
  }
  if (body.logoUrl === null) {
    patch.logo_url = null;
  }
  if (body.settings && typeof body.settings === 'object') {
    patch.settings = body.settings as TenantSettings;
  }

  if (!Object.keys(patch).length) {
    return NextResponse.json(
      { error: 'Nada que actualizar' },
      { status: 400 }
    );
  }

  const r = await fetch(
    `${supabaseUrl()}/rest/v1/tenants?id=eq.${encodeURIComponent(tenantId)}`,
    {
      method: 'PATCH',
      headers: {
        ...headers,
        'Content-Type': 'application/json',
        Prefer: 'return=representation',
      },
      body: JSON.stringify(patch),
    }
  );
  if (!r.ok) {
    const msg = await r.text();
    return NextResponse.json(
      {
        error:
          msg.includes('logo_url') || msg.includes('settings')
            ? 'Aplicar sql/tenant_ficha.sql en Supabase'
            : msg.includes('agency_followed')
              ? 'Aplicar sql/agency_control.sql'
              : msg.slice(0, 300),
      },
      { status: 500 }
    );
  }
  const rows = await r.json();
  return NextResponse.json({ tenant: rows[0] || rows });
}