#ifndef MISC_H_INCLUDED
#define MISC_H_INCLUDED

#include <string>
#include <vector>
#include <sstream>
#include <algorithm>

#include <yaml-cpp/yaml.h>

#include "string_hash.h"

#ifdef _WIN32
#include <unistd.h>
#define PATH_SLASH "\\"
#else
#include <sys/types.h>
#include <sys/stat.h>
#define PATH_SLASH "//"
#endif // _WIN32

#define CONCAT(a,b) a ## b
#define DO_CONCAT(a,b) CONCAT(a,b)
template <typename T> class __defer_struct final {private: T fn; bool __cancelled = false; public: explicit __defer_struct(T func) : fn(std::move(func)) {} ~__defer_struct() {if(!__cancelled) fn();} void cancel() {__cancelled = true;} };
//#define defer(x) std::unique_ptr<void> DO_CONCAT(__defer_deleter_,__LINE__) (nullptr, [&](...){x});
#define defer(x) __defer_struct DO_CONCAT(__defer_deleter,__LINE__) ([&](...){x;});

#define GETBIT(x,n) (((int)x < 1) ? 0 : ((x >> (n - 1)) & 1))
#define SETBIT(x,n,v) x ^= (-v ^ x) & (1UL << (n - 1))

typedef std::string::size_type string_size;
typedef std::vector<std::string> string_array;
typedef std::map<std::string, std::string> string_map;
typedef const std::string &refCnstStr;

static const std::string base64_chars =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    "abcdefghijklmnopqrstuvwxyz"
    "0123456789+/";

std::string UrlEncode(const std::string& str);
std::string UrlDecode(const std::string& str);
std::string base64_decode(const std::string &encoded_string, bool accept_urlsafe = false);
std::string base64_encode(const std::string &string_to_encode);

std::vector<std::string> split(const std::string &s, const std::string &seperator);
std::string getUrlArg(const std::string &url, const std::string &request);
std::string replace_all_distinct(std::string str, const std::string &old_value, const std::string &new_value);
std::string urlsafe_base64(const std::string &encoded_string);
std::string urlsafe_base64_reverse(const std::string &encoded_string);
std::string urlsafe_base64_decode(const std::string &encoded_string);
std::string urlsafe_base64_encode(const std::string &string_to_encode);
std::string UTF8ToACP(const std::string &str_src);
std::string ACPToUTF8(const std::string &str_src);
std::string trim_of(const std::string& str, char target, bool before = true, bool after = true);
std::string trim(const std::string& str, bool before = true, bool after = true);
std::string trim_quote(const std::string &str, bool before = true, bool after = true);
void trim_self_of(std::string &str, char target, bool before = true, bool after = true);
std::string getSystemProxy();
std::string rand_str(const int len);
bool is_str_utf8(const std::string &data);
std::string getFormData(const std::string &raw_data);

void sleep(int interval);
bool regValid(const std::string &reg);
bool regFind(const std::string &src, const std::string &match);
std::string regReplace(const std::string &src, const std::string &match, const std::string &rep, bool global = true, bool multiline = true);
bool regMatch(const std::string &src, const std::string &match);
int regGetMatch(const std::string &src, const std::string &match, size_t group_count, ...);
std::string regTrim(const std::string &src);
std::string speedCalc(double speed);
std::string getMD5(const std::string &data);
bool isIPv4(const std::string &address);
bool isIPv6(const std::string &address);
void urlParse(std::string &url, std::string &host, std::string &path, int &port, bool &isTLS);
void removeUTF8BOM(std::string &data);
int shortAssemble(unsigned short num_a, unsigned short num_b);
void shortDisassemble(int source, unsigned short &num_a, unsigned short &num_b);
std::string UTF8ToCodePoint(const std::string &data);
std::string GetEnv(const std::string &name);
std::string toLower(const std::string &str);
std::string toUpper(const std::string &str);
void ProcessEscapeChar(std::string &str);
void ProcessEscapeCharReverse(std::string &str);

std::string fileGet(const std::string &path, bool scope_limit = false);
int fileWrite(const std::string &path, const std::string &content, bool overwrite);
bool fileExist(const std::string &path, bool scope_limit = false);
bool fileCopy(const std::string &source, const std::string &dest);
std::string fileToBase64(const std::string &filepath);
std::string fileGetMD5(const std::string &filepath);

static inline bool strFind(const std::string &str, const std::string &target)
{
    return str.find(target) != str.npos;
}

static inline bool startsWith(const std::string &hay, const std::string &needle)
{
    return hay.substr(0, needle.length()) == needle;
}

static inline bool endsWith(const std::string &hay, const std::string &needle)
{
    std::string::size_type hl = hay.length(), nl = needle.length();
    return hl >= nl && hay.substr(hl - nl, nl) == needle;
}

template <typename T> static inline void eraseElements(std::vector<T> &target)
{
    target.clear();
    target.shrink_to_fit();
}

template <typename T> static inline void eraseElements(T &target)
{
    T().swap(target);
}

template <typename T, typename U> static inline T to_number(const U &value, T def_value = T())
{
    T retval = 0.0;
    char c;
    std::stringstream ss;
    ss << value;
    if(!(ss >> retval))
        return def_value;
    else if(ss >> c)
        return def_value;
    else
        return retval;
}

int to_int(const std::string &str, int def_value = 0);

static inline bool count_least(const std::string &hay, const char needle, size_t cnt)
{
    string_size pos = hay.find(needle);
    while(pos != hay.npos)
    {
        cnt--;
        if(!cnt)
            return true;
        pos = hay.find(needle, pos + 1);
    }
    return false;
}

static inline char getLineBreak(const std::string &str)
{
    return count_least(str, '\n', 1) ? '\n' : '\r';
}

class tribool
{
private:

    char _M_VALUE = 0;

public:

    tribool() { clear(); }

    template <typename T> tribool(const T &value) { set(value); }

    tribool(const tribool &value) { *this = value; }

    ~tribool() = default;

    tribool& operator=(const tribool &src)
    {
        _M_VALUE = src._M_VALUE;
        return *this;
    }

    template <typename T> tribool& operator=(const T &value)
    {
        set(value);
        return *this;
    }

    operator bool() const { return _M_VALUE == 3; }

    bool is_undef() { return _M_VALUE <= 1; }

    template <typename T> tribool define(const T &value)
    {
        if(_M_VALUE <= 1)
            *this = value;
        return *this;
    }

    template <typename T> tribool read(const T &value)
    {
        define(value);
        return *this;
    }

    tribool reverse()
    {
        if(_M_VALUE > 1)
            _M_VALUE = _M_VALUE > 2 ? 2 : 3;
        return *this;
    }

    bool get(const bool &def_value = false)
    {
        if(_M_VALUE <= 1)
            return def_value;
        return _M_VALUE == 3;
    }

    std::string get_str()
    {
        switch(_M_VALUE)
        {
        case 2:
            return "false";
        case 3:
            return "true";
        }
        return "undef";
    }

    template <typename T> bool set(const T &value)
    {
        _M_VALUE = (bool)value + 2;
        return _M_VALUE > 2;
    }

    bool set(const std::string &str)
    {
        switch(hash_(str))
        {
        case "true"_hash:
        case "1"_hash:
            _M_VALUE = 3;
            break;
        case "false"_hash:
        case "0"_hash:
            _M_VALUE = 2;
            break;
        default:
            if(to_int(str, 0) > 1)
                _M_VALUE = 3;
            else
                _M_VALUE = 0;
            break;
        }
        return _M_VALUE;
    }

    void clear() { _M_VALUE = 0; }
};

#ifndef HAVE_TO_STRING
namespace std
{
template <typename T> std::string to_string(const T& n)
{
    std::ostringstream ss;
    ss << n;
    return ss.str();
}
}
#endif // HAVE_TO_STRING

static inline int md(const char *path)
{
#ifdef _WIN32
    return mkdir(path);
#else
    return mkdir(path, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
#endif // _WIN32
}

#ifdef _WIN32
void StringToWstring(std::wstring& szDst, const std::string &str);
#endif // _WIN32

#endif // MISC_H_INCLUDED