import { type NextRequest, NextResponse } from "next/server";
import { generateAccessToken, verifyRefreshToken } from "@/lib/auth/jwt";
import {
  checkRateLimit,
  createRateLimitResponse,
  getClientIP,
} from "@/lib/rate-limiter";
import { secureLogger } from "@/lib/secure-logger";

export async function POST(request: NextRequest) {
  try {
    // Rate limiting
    const ip = getClientIP(request);
    const rateLimit = checkRateLimit(ip, "/api/auth/refresh");

    if (!rateLimit.allowed) {
      return createRateLimitResponse(rateLimit.resetAt);
    }

    // Extrair refresh token do cookie
    const refreshToken = request.cookies.get("refreshToken")?.value;

    if (!refreshToken) {
      return NextResponse.json(
        {
          success: false,
          error: "Refresh token não fornecido",
        },
        { status: 401 },
      );
    }

    // Validar refresh token
    const payload = verifyRefreshToken(refreshToken);

    if (!payload) {
      // Token inválido - limpar cookie
      const response = NextResponse.json(
        {
          success: false,
          error: "Refresh token inválido ou expirado",
        },
        { status: 401 },
      );

      response.cookies.delete("refreshToken");
      return response;
    }

    // Gerar novo access token
    const accessToken = generateAccessToken(payload.userId, payload.username);

    secureLogger.info("✅ Token renovado com sucesso", {
      userId: payload.userId,
      timestamp: new Date().toISOString(),
    });

    return NextResponse.json(
      {
        success: true,
        accessToken,
      },
      { status: 200 },
    );
  } catch (error) {
    secureLogger.error("❌ Erro ao renovar token", {
      error: error instanceof Error ? error.message : "Erro desconhecido",
      stack: error instanceof Error ? error.stack : undefined,
      timestamp: new Date().toISOString(),
    });

    return NextResponse.json(
      {
        success: false,
        error: error instanceof Error ? error.message : "Erro interno",
      },
      { status: 500 },
    );
  }
}