import type { Metadata } from "next";
import { notFound } from "next/navigation";

import {
  listBakedFunnelScreenParams,
  peekBakedFunnelDefinition,
  loadFunnelDefinition,
} from "@/lib/funnel/loadFunnelDefinition";
import { FunnelRuntime } from "@/components/funnel/FunnelRuntime";
import type { FunnelDefinition } from "@/lib/funnel/types";

// Функция для загрузки воронки из базы данных напрямую
async function loadFunnelFromDatabase(funnelId: string): Promise<FunnelDefinition | null> {
  try {
    // Импортируем модели напрямую вместо HTTP запроса
    const { default: connectMongoDB } = await import('@/lib/mongodb');
    const { default: FunnelModel } = await import('@/lib/models/Funnel');
    
    await connectMongoDB();
    
    const funnel = await FunnelModel.findOne({ 
      'funnelData.meta.id': funnelId,
      status: { $in: ['published', 'draft'] }
    }).lean();
    
    if (funnel) {
      return funnel.funnelData as FunnelDefinition;
    }
    
    return null;
  } catch (error) {
    console.error(`Failed to load funnel '${funnelId}' from database:`, error);
    return null;
  }
}

interface FunnelScreenPageProps {
  params: Promise<{
    funnelId: string;
    screenId: string;
  }>;
}

export const dynamic = "force-dynamic"; // Изменено для поддержки базы данных

export function generateStaticParams() {
  return listBakedFunnelScreenParams();
}

export async function generateMetadata({
  params,
}: FunnelScreenPageProps): Promise<Metadata> {
  const { funnelId } = await params;
  let funnel: ReturnType<typeof peekBakedFunnelDefinition>;
  try {
    funnel = peekBakedFunnelDefinition(funnelId);
  } catch (error) {
    console.error(`Failed to load funnel '${funnelId}' for metadata:`, error);
    notFound();
  }

  return {
    title: funnel.meta.title ?? "Funnel",
    description: funnel.meta.description ?? undefined,
  } satisfies Metadata;
}

export default async function FunnelScreenPage({
  params,
}: FunnelScreenPageProps) {
  const { funnelId, screenId } = await params;
  
  let funnel: FunnelDefinition | null = null;

  // Сначала пытаемся загрузить из базы данных
  funnel = await loadFunnelFromDatabase(funnelId);

  // Если не найдено в базе, пытаемся загрузить из JSON файлов
  if (!funnel) {
    try {
      funnel = await loadFunnelDefinition(funnelId);
    } catch (error) {
      console.error(`Failed to load funnel '${funnelId}' from files:`, error);
    }
  }

  // Если воронка не найдена ни в базе, ни в файлах
  if (!funnel) {
    notFound();
  }

  const screen = funnel.screens.find((item) => item.id === screenId);
  if (!screen) {
    notFound();
  }

  return <FunnelRuntime funnel={funnel} initialScreenId={screenId} />;
}