#pragma once
#include <string>
#include <winsock2.h>
#include <iphlpapi.h>
#include <ws2tcpip.h>
#include <WinInet.h>
#include "logger.h"
#include "jsoncpp/json.h"

#ifndef _WIN64
#ifdef _DEBUG
#pragma comment(lib, "jsoncpp/jsoncppd.lib")
#else
#pragma comment(lib, "jsoncpp/jsoncpp.lib")
#endif
#else
#ifdef _DEBUG
#pragma comment(lib, "jsoncpp/jsoncpp_x64d.lib")
#else
#pragma comment(lib, "jsoncpp/jsoncpp_x64.lib")
#endif
#endif

#pragma comment(lib, "wininet.lib")
#pragma comment(lib, "Iphlpapi.lib")

inline void splitIpPort(const std::string& input, std::string& ip, std::string& port) {
	size_t pos = input.find(':');
	if (pos != std::string::npos) {
		ip = input.substr(0, pos);
		port = input.substr(pos + 1);
	}
	else {
		ip = input;
		port = "";
	}
}

/**
 * IPConverter: IP 操作类，用于获取公网IP，获取IP对应的地理位置等.
 * 目前是通过调用公开的互联网API完成，假如该查询网站不可访问则需要重新适配.
 */
class IPConverter
{
public:
	std::string IPtoAddress(const std::string& ip) { return "implement me"; }

	/**
	 * 判断给定的 IP 地址是否是局域网（内网）IP
	 * @param ipAddress IP 地址字符串（如 "192.168.1.1"）
	 * @return 如果是局域网 IP，返回 true; 否则返回 false
	 */
	bool IsPrivateIP(const std::string& ipAddress) {
		// 将 IP 地址字符串转换为二进制格式
		in_addr addr;
		if (inet_pton(AF_INET, ipAddress.c_str(), &addr) != 1) {
			Mprintf("Invalid IP address: %s\n", ipAddress.c_str());
			return false;
		}

		// 将二进制 IP 地址转换为无符号整数
		unsigned long ip = ntohl(addr.s_addr);

		// 检查 IP 地址是否在局域网范围内
		if ((ip >= 0x0A000000 && ip <= 0x0AFFFFFF) || // 10.0.0.0/8
			(ip >= 0xAC100000 && ip <= 0xAC1FFFFF) || // 172.16.0.0/12
			(ip >= 0xC0A80000 && ip <= 0xC0A8FFFF) || // 192.168.0.0/16
			(ip >= 0x7F000000 && ip <= 0x7FFFFFFF)) { // 127.0.0.0/8
			return true;
		}

		return false;
	}

	// 获取本机地理位置
	std::string GetLocalLocation() {
		return GetGeoLocation(getPublicIP());
	}

	// 获取 IP 地址地理位置(基于[ipinfo.io])
	std::string GetGeoLocation(const std::string& IP) {
		if (IP.empty()) return "";

		std::string ip = IP;
		if (isLocalIP(ip)) {
			ip = getPublicIP();
			if (ip.empty())
				return "";
		}

		HINTERNET hInternet, hConnect;
		DWORD bytesRead;
		std::string readBuffer;

		// 初始化 WinINet
		hInternet = InternetOpen("IP Geolocation", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
		if (hInternet == NULL) {
			Mprintf("InternetOpen failed! %d\n", GetLastError());
			return "";
		}

		// 创建 HTTP 请求句柄
		std::string url = "http://ipinfo.io/" + ip + "/json";
		hConnect = InternetOpenUrlA(hInternet, url.c_str(), NULL, 0, INTERNET_FLAG_RELOAD, 0);
		if (hConnect == NULL) {
			Mprintf("InternetOpenUrlA failed! %d\n", GetLastError());
			InternetCloseHandle(hInternet);
			return "";
		}

		// 读取返回的内容
		char buffer[4096];
		while (InternetReadFile(hConnect, buffer, sizeof(buffer), &bytesRead) && bytesRead > 0) {
			readBuffer.append(buffer, bytesRead);
		}

		// 解析 JSON 响应
		Json::Value jsonData;
		Json::Reader jsonReader;
		std::string location;

		if (jsonReader.parse(readBuffer, jsonData)) {
			std::string country = jsonData["country"].asString();
			std::string city = jsonData["city"].asString();
			std::string loc = jsonData["loc"].asString();  // 经纬度信息
			if (city.empty() && country.empty()) {
			}
			else if (city.empty()) {
				location = country;
			}
			else if (country.empty()) {
				location = city;
			}
			else {
				location = city + ", " + country;
			}
			if (location.empty() && IsPrivateIP(ip)) {
				location = "Local Area Network";
			}
		}
		else {
			Mprintf("Failed to parse JSON response: %s.\n", readBuffer.c_str());
		}

		// 关闭句柄
		InternetCloseHandle(hConnect);
		InternetCloseHandle(hInternet);

		return location;
	}

	bool isLoopbackAddress(const std::string& ip) {
		return (ip == "127.0.0.1" || ip == "::1");
	}

	bool isLocalIP(const std::string& ip) {
		if (isLoopbackAddress(ip)) return true; // 先检查回环地址

		ULONG outBufLen = 15000;
		IP_ADAPTER_ADDRESSES* pAddresses = (IP_ADAPTER_ADDRESSES*)malloc(outBufLen);
		if (GetAdaptersAddresses(AF_UNSPEC, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen) == ERROR_BUFFER_OVERFLOW) {
			free(pAddresses);
			pAddresses = (IP_ADAPTER_ADDRESSES*)malloc(outBufLen);
		}

		if (GetAdaptersAddresses(AF_UNSPEC, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen) == NO_ERROR) {
			for (IP_ADAPTER_ADDRESSES* pCurrAddresses = pAddresses; pCurrAddresses; pCurrAddresses = pCurrAddresses->Next) {
				for (IP_ADAPTER_UNICAST_ADDRESS* pUnicast = pCurrAddresses->FirstUnicastAddress; pUnicast; pUnicast = pUnicast->Next) {
					char addressBuffer[INET6_ADDRSTRLEN] = { 0 };
					getnameinfo(pUnicast->Address.lpSockaddr, pUnicast->Address.iSockaddrLength, addressBuffer, sizeof(addressBuffer), nullptr, 0, NI_NUMERICHOST);

					if (ip == addressBuffer) {
						free(pAddresses);
						return true;
					}
				}
			}
		}

		free(pAddresses);
		return false;
	}

	// 获取公网IP, 获取失败返回空
	std::string getPublicIP() {
		HINTERNET hInternet, hConnect;
		DWORD bytesRead;
		char buffer[1024] = { 0 };

		hInternet = InternetOpen("Mozilla/5.0", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
		if (!hInternet) return "";

		hConnect = InternetOpenUrl(hInternet, "https://api.ipify.org", NULL, 0, INTERNET_FLAG_RELOAD | INTERNET_FLAG_SECURE, 0);
		if (!hConnect) {
			InternetCloseHandle(hInternet);
			return "";
		}

		InternetReadFile(hConnect, buffer, sizeof(buffer) - 1, &bytesRead);
		InternetCloseHandle(hConnect);
		InternetCloseHandle(hInternet);

		return std::string(buffer);
	}
};