//
// Created by neo on 5/26/2023.
//

#ifndef WINDOWSXPKG_HEADER_H
#define WINDOWSXPKG_HEADER_H

#ifdef DEBUG
#include <cassert>
#else
#define assert(x) /* nothing */
#endif

#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <ctime>

#include <random>
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <unordered_map>

#include <nlohmann/json.hpp>

#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/sha.h>
#include <openssl/rand.h>

// Algorithm macros
#define PK_LENGTH           25
#define NULL_TERMINATOR     1

#define FIELD_BITS          384
#define FIELD_BYTES         48
#define FIELD_BITS_2003     512
#define FIELD_BYTES_2003    64

#define NEXTSNBITS(field, n, offset)    (((QWORD)field >> offset) & ((1ULL << (n)) - 1))
#define FIRSTNBITS(field, n)           NEXTSNBITS(field, n, 0)

// Confirmation ID generator constants
#define SUCCESS 0
#define ERR_TOO_SHORT 1
#define ERR_TOO_LARGE 2
#define ERR_INVALID_CHARACTER 3
#define ERR_INVALID_CHECK_DIGIT 4
#define ERR_UNKNOWN_VERSION 5
#define ERR_UNLUCKY 6

// Type definitions
typedef bool     BOOL;
typedef uint8_t  BYTE;
typedef uint16_t WORD;
typedef uint32_t DWORD;
typedef uint64_t QWORD;

// Global variables
extern char pCharset[];

// util.cpp
void endian(BYTE *data, int length);
EC_GROUP *initializeEllipticCurve(
        std::string pSel,
        std::string aSel,
        std::string bSel,
        std::string generatorXSel,
        std::string generatorYSel,
        std::string publicKeyXSel,
        std::string publicKeyYSel,
        EC_POINT *&genPoint,
        EC_POINT *&pubPoint
);

// key.cpp
void unbase24(BYTE *byteSeq, const char *cdKey);
void base24(char *cdKey, BYTE *byteSeq);

// cli.cpp
void print_product_key(char *pk);
void print_product_id(DWORD *pid);

struct Options {
    std::string binkid;
    int channelID;
    bool verbose;
    bool help;
    bool list;
    bool error;
};

Options parseCommandLine(int argc, char* argv[]);
void showHelp(char *argv[]);

// xp.cpp
bool verifyXPKey(
        EC_GROUP *eCurve,
        EC_POINT *generator,
        EC_POINT *publicKey,
        char (&cdKey)[25]
);

void generateXPKey(
        EC_GROUP *eCurve,
        EC_POINT *generator,
        BIGNUM *order,
        BIGNUM *privateKey,
        DWORD pRaw,
        char (&cdKey)[25]
);

// server.cpp

#endif //WINDOWSXPKG_HEADER_H