/**
 * GET /api/chats/[chatId] - Busca detalhes de um chat específico
 */

import { type NextRequest, NextResponse } from "next/server";
import { requireAuth } from "@/lib/auth/middleware";
import { connectMongoDB } from "@/lib/mongodb/connection";
import { Chat } from "@/lib/mongodb/models/Chat";
import { secureLogger } from "@/lib/secure-logger";

export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ chatId: string }> },
) {
  try {
    const authResult = await requireAuth(request);
    if (authResult instanceof NextResponse) return authResult;
    const auth = authResult;

    const { chatId } = await params;

    await connectMongoDB();

    // Buscar chat
    const chat = await Chat.findOne({ chat_id: chatId });

    if (!chat) {
      return NextResponse.json(
        { success: false, error: "Chat não encontrado" },
        { status: 404 },
      );
    }

    // Verificar se o usuário pertence ao chat
    if (chat.buyer_id !== auth.userId && chat.seller_id !== auth.userId) {
      return NextResponse.json(
        {
          success: false,
          error: "Você não tem permissão para acessar este chat",
        },
        { status: 403 },
      );
    }

    return NextResponse.json(
      {
        success: true,
        chat: {
          chat_id: chat.chat_id,
          listing_id: chat.listing_id,
          buyer_id: chat.buyer_id,
          seller_id: chat.seller_id,
          created_at: chat.created_at.toISOString(),
          updated_at: chat.updated_at.toISOString(),
          last_message_at: chat.last_message_at?.toISOString() || null,
          last_message_preview: chat.last_message_preview,
          buyer_unread_count: chat.buyer_unread_count,
          seller_unread_count: chat.seller_unread_count,
          is_active: chat.is_active,
          listing_cache: chat.listing_cache,
          buyer_cache: chat.buyer_cache,
          seller_cache: chat.seller_cache,
        },
      },
      { status: 200 },
    );
  } catch (error) {
    secureLogger.error("❌ Erro ao buscar chat", {
      error: error instanceof Error ? error.message : "Erro desconhecido",
      stack: error instanceof Error ? error.stack : undefined,
    });

    return NextResponse.json(
      { success: false, error: "Erro ao buscar chat" },
      { status: 500 },
    );
  }
}