#ifndef SUDOKU_H
#define SUDOKU_H

//This is a wrapper of a DLL so I can use it in VB

#include <windows.h>
#include <atlsafe.h>
#include <cstdlib>
#include <time.h>

//the dll
HINSTANCE hDll;

//the structs needed
struct penCellType 
{
	int penMarks[9];
	int length;
};

struct hintInfoType 
{
	int hintCol;
	int hintRow;
	char hintText1[128];
	char hintText2[128];
};

//all the DLL functions
typedef int (*FPTR_Solve)(int, int, int, int, int*);
typedef int (*FPTR_Generate)(int*, int, int, int, int, int);
typedef int (*FPTR_GetNodesSearched)();
typedef int (*FPTR_GetFirstSolution)(int, int);
typedef int (*FPTR_GetFirstSolDepth)();
typedef int (*FPTR_GetFirstSolNodes)();
typedef int (*FPTR_GetCountGenerate)();
typedef int (*FPTR_GetProcessingTime)();
typedef int (*FPTR_HintX)(penCellType*, hintInfoType, int*, int, int);
typedef int (*FPTR_SetLevels)(int*);

//declare the functions
FPTR_Solve Solve;
FPTR_Generate Generate;
FPTR_GetNodesSearched GetNodesSearched;
FPTR_GetFirstSolution GetFirstSolution;
FPTR_GetFirstSolDepth GetFirstSolDepth;
FPTR_GetFirstSolNodes GetFirstSolNodes;
FPTR_GetCountGenerate GetCountGenerate;
FPTR_GetProcessingTime GetProcessingTime;
FPTR_HintX HintX;
FPTR_SetLevels SetLevels;

/*=========================================================================================================
  =========================================================================================================*/

//declare this dll's functions
void __declspec(dllexport) init();
void __declspec(dllexport) destroy();

//###the variables we need###
int mOrig[9][9];
int mPuzzle[9][9];
int mWholeBoard[9][9];

//###declare the functions###

int __declspec(dllexport) InitSudokuDLL();
int __declspec(dllexport) DestroySudokuDLL();

//generates a sudoku puzzle
int __declspec(dllexport) GeneratePuzzle(int diff, int diffMin, int diffMax, int diag, int symetric);

//this is for solving user-defined puzzles.  the user must set all the values be SetSquare
//then this solves mPuzzle and stores the result in mWholeBoard, where the user can retrive it via GetRealVal
int __declspec(dllexport) SolvePuzzle(int guessOnly, int noGuess, int diag, int diff);

//sets one square of the board to a certain number
int __declspec(dllexport) SetSquare(int row, int col, int val){ mPuzzle[row][col] = val;  return val; }

//returns the value of a certain square
int __declspec(dllexport) GetSquare(int row, int col){ return mPuzzle[row][col]; }

//reveals the value of a particular square
int __declspec(dllexport) HintShowSquare(int row, int col) { return mWholeBoard[row][col]; }

//reveals the value of a random square
int __declspec(dllexport) HintShowRand(int* row, int* col, int* val);

//fine-tunes the difficulty levels
int __declspec(dllexport) SetDiffLevels(SAFEARRAY specs);

//returns the time it took to solve the last-solved puzzle
int __declspec(dllexport) GetSolveTime() { return GetProcessingTime(); }

//gets the real value of a square
int __declspec(dllexport) GetRealVal(int row, int col) { return mWholeBoard[row][col]; }

#endif