import { NextRequest, NextResponse } from "next/server";

export async function GET(request: NextRequest) {
  try {
    // Check for Cloudflare's IP header first (production)
    const cfConnectingIp = request.headers.get("cf-connecting-ip");
    const forwardedFor = request.headers.get("x-forwarded-for");
    const realIP = request.headers.get("x-real-ip");
    
    // Use Cloudflare IP first, then fall back to other headers
    let ip = cfConnectingIp || forwardedFor?.split(",")[0]?.trim() || realIP || "127.0.0.1";
    
    // For local development, return XX as country code (Mautic accepts this)
    if (ip === "127.0.0.1" || ip === "::1" || ip.startsWith("192.168.") || ip.startsWith("10.")) {
      console.log("[GeoIP] Local/private IP detected:", ip);
      return NextResponse.json({
        country: "Unknown",
        countryCode: "XX",
        region: "",
        city: "",
        timezone: "",
      });
    }
    
    const response = await fetch(`http://ip-api.com/json/${ip}?fields=status,message,country,countryCode,region,regionName,city,timezone`, {
      headers: {
        "Accept": "application/json",
      },
    });

    if (!response.ok) {
      throw new Error("GeoIP lookup failed");
    }

    const data = await response.json();
    
    if (data.status !== "success") {
      console.error("[GeoIP] API error:", data.message, "for IP:", ip);
      return NextResponse.json({
        country: "Unknown",
        countryCode: "XX",
        region: "",
        city: "",
        timezone: "",
      });
    }

    console.log("[GeoIP] Success:", data.country, "(" + data.countryCode + ")");
    
    return NextResponse.json({
      country: data.country,
      countryCode: data.countryCode,
      region: data.regionName,
      city: data.city,
      timezone: data.timezone,
    });
  } catch (error) {
    console.error("[GeoIP] Error:", error);
    return NextResponse.json({
      country: "Unknown",
      countryCode: "XX",
      region: "",
      city: "",
      timezone: "",
    });
  }
}