#pragma once
#pragma once
#include <string>
#include <locale>  
#include <codecvt>
#include <iostream>
#include <sstream>
#include <iomanip>
#include <vector>
using namespace std;

class StringUtil {

public:
	static string wstringToString(wstring wt) {
		wstring_convert<codecvt_utf8<wchar_t>> conv;
		string result = conv.to_bytes(wt);
		return result;
	}

	static std::wstring Unescape(const std::string& input) {
		std::wstring wresult;
		for (size_t i = 0; i < input.length(); ) {
			if (input[i] == '\\' && input[i + 1] == 'u') {
				std::string code = input.substr(i + 2, 4);
				wchar_t unicode = stoi(code, nullptr, 16);
				wresult += unicode;
				i += 6;
			}
			else {
				wresult += input[i++];
			}
		}
		return wresult;
	}


	static string to_string(double val,int precision = 2) {
		std::stringstream stream;
		stream << std::fixed << std::setprecision(precision) << val;
		return stream.str();
	}

	static bool isNumber(const std::string& str) {
		if (str.empty()) {
			return false;
		}
		for (char c : str) {
			if (!isdigit(c)) {
				return false;
			}
		}
		return true;
	}

	// doubleתΪ×Ö·û´®
	static string toString(double value, int precision) {
		std::ostringstream oss;
		oss << std::fixed << std::setprecision(precision) << value;
		return oss.str();
	}

	static std::vector<std::string> split(std::string str, std::string pattern) {
		std::string::size_type pos;
		std::vector<std::string> result;
		str += pattern;//À©Õ¹×Ö·û´®ÒÔ·½±ã²Ù×÷
		int size = str.size();
		for (int i = 0; i < size; i++)
		{
			pos = str.find(pattern, i);
			if (pos < size)
			{
				std::string s = str.substr(i, pos - i);
				result.push_back(s);
				i = pos + pattern.size() - 1;
			}
		}
		return result;
	}


};