import { NextResponse } from 'next/server';
import { createClient } from '@/lib/supabase/server';
import { resolveActiveTenant, restGet } from '@/lib/tenant-context';
import { isAgencyRole, serviceHeaders, supabaseUrl, userRole } from '@/lib/agency';
import octPlan from '@/data/rrss-octubre-2026.json';

export const dynamic = 'force-dynamic';

/**
 * POST — publish bundled RRSS month plan into documents for the active tenant.
 * Agency only. Idempotent upsert by title + type.
 */
export async function POST() {
  const supabase = await createClient();
  const {
    data: { user },
  } = await supabase.auth.getUser();
  if (!user) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
  }
  if (!isAgencyRole(userRole(user))) {
    return NextResponse.json({ error: 'Solo agencia' }, { status: 403 });
  }

  const ctx = await resolveActiveTenant(user);
  if (!ctx.tenantId || ctx.portfolioWide) {
    return NextResponse.json(
      { error: 'Selecciona un cliente en Contexto' },
      { status: 400 }
    );
  }

  const t = await restGet<{ slug?: string; name?: string }[]>(
    `/rest/v1/tenants?id=eq.${encodeURIComponent(ctx.tenantId)}&select=slug,name`
  );
  const slug = t.data?.[0]?.slug || '';
  if (slug !== 'agua-miia') {
    return NextResponse.json(
      {
        error:
          'Este botón solo carga el plan de octubre de Agua Miia en su propio portal. No publica en Instagram ni copia el calendario a otros clientes.',
      },
      { status: 400 }
    );
  }

  const headers = serviceHeaders();
  if (!headers) {
    return NextResponse.json({ error: 'no service role' }, { status: 500 });
  }

  const title = `RRSS ${octPlan.label}`;
  const tid = encodeURIComponent(ctx.tenantId);
  const existing = await restGet<Array<{ id: string }>>(
    `/rest/v1/documents?tenant_id=eq.${tid}&type=eq.calendar&title=eq.${encodeURIComponent(title)}&select=id&limit=1`
  );

  const payload = {
    tenant_id: ctx.tenantId,
    type: 'calendar',
    title,
    content: octPlan,
  };

  let res: Response;
  if (existing.data?.[0]?.id) {
    res = await fetch(
      `${supabaseUrl()}/rest/v1/documents?id=eq.${existing.data[0].id}`,
      {
        method: 'PATCH',
        headers: { ...headers, 'Content-Type': 'application/json', Prefer: 'return=representation' },
        body: JSON.stringify({ content: octPlan, title }),
      }
    );
  } else {
    res = await fetch(`${supabaseUrl()}/rest/v1/documents`, {
      method: 'POST',
      headers: { ...headers, 'Content-Type': 'application/json', Prefer: 'return=representation' },
      body: JSON.stringify(payload),
    });
  }

  if (!res.ok) {
    return NextResponse.json(
      { error: await res.text() },
      { status: 502 }
    );
  }

  const row = await res.json();
  return NextResponse.json({
    ok: true,
    tenant: ctx.label,
    month: octPlan.month,
    pieces: (octPlan.pieces || []).length,
    document: Array.isArray(row) ? row[0] : row,
  });
}