#include <stdlib.h>
#include <string.h>
#include "vector.h"
#include "chesshelpers.h"

int in_board(vector_t position) {
	return position.mx < 8 && position.mx >= 0 && position.my < 8 && position.my >= 0;
}
int is_empty(int board[8][8], vector_t position) {
	return board[position.mx][position.my] == 0;
}
int is_color(int board[8][8], vector_t position, int color) {
	if(color == 0) {
		return board[position.mx][position.my] >= 1 && board[position.mx][position.my] <= 6;
	}	
	else {
		return board[position.mx][position.my] >= 7;
	}
}
//converts board coordinates into algebraic notation
char* get_readable_coords(vector_t position) {
	char* output = malloc(3 * sizeof(char));
	output[0] = 'a' + position.mx;
	output[1] = '8' - position.my;
	output[2] = '\0';
	return output;
}
//gets the proper algebraic notation for the move
char* get_move_name(int board[8][8], vector_t origin, vector_t end) {
	int piece = board[origin.mx][origin.my];
	if(piece > 6) {
		piece -= 6;
	}
	if(piece != 1) {
		char cPiece = piece == pawn ? 'P' : piece == knight ? 'N' : piece == bishop ? 'B' : piece == rook ? 'R' : piece == queen ? 'Q' : 'K';
		int isCapture = board[end.mx][end.my] != 0;
		char* output = calloc(isCapture ? 5 : 4, sizeof(char));
		output[0] = cPiece;
		if(isCapture) {
			output[1] = 'x';
		}
		char* rEnd = get_readable_coords(end);
		strcat(output, rEnd);
		free(rEnd);
		output[isCapture ? 4 : 3] = '\0';
		return output;
	}
	else {
		int isCapture = board[end.mx][end.my] != 0;
		char* output = calloc(isCapture ? 5 : 3, sizeof(char));
		if(isCapture) {
			output[0] = 'a' + origin.mx;
			output[1] = 'x';
		}
		char* rEnd = get_readable_coords(end);
		strcat(output, rEnd);
		free(rEnd);
		output[isCapture ? 4 : 2] = '\0';
		return output;
	}
}
int** clone_board(int board[8][8]) {
	int** newBoard = malloc(8 * 8 * sizeof(int));
	for(int r = 0; r < 8; r++) {
		for(int c = 0; c < 8; c++) {
			newBoard[c][r] = board[c][r];
		}
	}
	return newBoard;
}