#ifndef DLANG_HELPERS_HPP
#define DLANG_HELPERS_HPP

#define _WINSOCK_DEPRECATED_NO_WARNINGS
#ifdef _WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#pragma comment(lib, "ws2_32.lib")
#else
#include <sys/socket.h>
#include <netdb.h>
#include <unistd.h>
#include <cstring>
#define SOCKET int
#define INVALID_SOCKET -1
#define SOCKET_ERROR -1
#define closesocket close
#endif

#include <iostream>
#include <algorithm>
#include <sstream>
#include <cmath>

static bool isvalidnumber(char c)
{
	return ::isdigit(c) || c == '.' || c == ',';
}

static bool IsStringNumber(const std::string& input)
{
	return std::all_of(
		input.begin(),
		input.end(),
		::isvalidnumber
	);
}

static bool IsIdentifier(const std::string& input)
{
	if (!::isdigit(input.at(0)))
		return true;

	return false;
}

static std::string DoubleToString(double val) {
	double intPart;
	double fracPart = std::modf(val, &intPart);

	if (fracPart == 0.0) {
		return std::to_string(static_cast<long long>(val));
	}
	else {
		std::ostringstream oss;
		oss << val;
		return oss.str();
	}
}

static std::string NoSpacesString(const std::string& input)
{
    std::string output = "";
    for (const auto& c : input)
        if (::isdigit(c) || ::isalpha(c) || c == '.')
            output += c;

    return output;
}

static std::string getLatestVersion(const std::string& host, const std::string& path) {
#ifdef _WIN32
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) return "";
#endif

    SOCKET sock = socket(AF_INET, SOCK_STREAM, 0);
    if (sock == INVALID_SOCKET) {
#ifdef _WIN32
        WSACleanup();
#endif
        return "";
    }

    struct hostent* server = gethostbyname(host.c_str());
    if (!server) {
        closesocket(sock);
#ifdef _WIN32
        WSACleanup();
#endif
        return "";
    }

    struct sockaddr_in serv_addr;
    ::memset(&serv_addr, 0, sizeof(serv_addr));
    serv_addr.sin_family = AF_INET;
    ::memcpy(&serv_addr.sin_addr.s_addr, server->h_addr, server->h_length);
    serv_addr.sin_port = htons(80);

    if (connect(sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) == SOCKET_ERROR) {
        closesocket(sock);
#ifdef _WIN32
        WSACleanup();
#endif
        return "";
    }

    std::string request = "GET " + path + " HTTP/1.0\r\nHost: " + host + "\r\nConnection: close\r\n\r\n";
    send(sock, request.c_str(), (int)request.length(), 0);

    std::string response;
    char buffer[1024];
    int bytesReceived;
    while ((bytesReceived = recv(sock, buffer, sizeof(buffer) - 1, 0)) > 0) {
        buffer[bytesReceived] = '\0';
        response += buffer;
    }

    closesocket(sock);
#ifdef _WIN32
    WSACleanup();
#endif

    size_t pos = response.find("\r\n\r\n");
    if (pos != std::string::npos) {
        return NoSpacesString(response.substr(pos + 4));
    }
    return "";
}

#define dlang_pop(vm)			    vm->Pop()
#define dlang_top(vm)               (vm->stack.top())
#define dlang_tonumber(vm)          std::get<double>(vm->stack.pop().data)
#define dlang_toboolean(vm)         std::get<bool>(vm->stack.pop().data)
#define dlang_tostring(vm)          std::get<std::string>(vm->stack.pop().data)
#define dlang_totoken(vm)           (vm->stack.pop())
#define dlang_totable(vm)           std::get<std::shared_ptr<DlangTable>>(vm->stack.pop().data)
#define dlang_tolist(vm)            std::get<std::shared_ptr<DlangList>>(vm->stack.pop().data)
#define dlang_tocfunction(vm)       std::get<NativeFunctionPtr>(vm->stack.pop().data)

#define dlang_pushnumber(vm, number)    vm->PushNumber(number)
#define dlang_pushboolean(vm, boolean)  vm->PushBoolean(boolean)
#define dlang_pushstring(vm, stringv)   vm->PushString(stringv)
#define dlang_pushnil(vm)               vm->stack.push(StackValue())
#define dlang_push(vm, stackval)		vm->stack.push(stackval)

#define dlang_isnumber(vm)      (vm->stack.peek().type == StackValueType::Int)
#define dlang_isstring(vm)      (vm->stack.peek().type == StackValueType::String)
#define dlang_isboolean(vm)     (vm->stack.peek().type == StackValueType::Bool)
#define dlang_istable(vm)       (vm->stack.peek().type == StackValueType::Table)
#define dlang_islist(vm)        (vm->stack.peek().type == StackValueType::List)
#define dlang_isfunction(vm)    (vm->stack.peek().type == StackValueType::Function)
#define dlang_isnil(vm)         (vm->stack.peek().type == StackValueType::NIL)

#define dlang_pushcfunction(vm, func)   vm->PushCFunction(func)
#define dlang_setglobal(vm, name)       vm->globals.Set(name, vm->stack.pop())
#define dlang_getglobal(vm, name)       vm->stack.push(vm->globals.Get(name))
#define dlang_call(vm, args)            vm->CallFunc(args)

#define dlang_newtable(vm)              vm->stack.push(StackValue(StackValueType::Table, std::make_shared<DlangTable>()))
#define dlang_setfield(vm, keyName)     vm->SetField(keyName)
#define dlang_getfield(vm, keyName)     vm->GetField(keyName)
// dlang_getfieldp will pop the table from stack and not return it
#define dlang_getfieldp(vm, keyName)    vm->GetField(keyName, true)

#define dlang_newlist(vm)           vm->PushList(std::make_shared<DlangList>());
#define dlang_setindex(vm)          vm->SetListIndex()
#define dlang_getindex(vm)          vm->GetListIndex()
#define dlang_pushindex(vm)         vm->PushListIndex();

#endif