144 lines
2.7 KiB
PHP
144 lines
2.7 KiB
PHP
<?php
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header('Access-Control-Allow-Origin: *');
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header('Access-Control-Allow-Methods: GET, POST');
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header('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept');
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/*
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* stupid IA for battle ship
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* choose by random a free column
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*/
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function score($board,$me,$opponent,$colToPlay,$depth){
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$newBoard = $board;
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//add cell
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for($y = 0; $board[$y][$colToPlay] <> "+"; $y++){
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}
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$newBoard[$y][$colToPlay] = $me;
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//do I win?
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$searchValue="";
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for($i = 0 ; $i < 4; $i++){
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$searchValue.=$me;
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}
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//horizontaly
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$line="";
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for ($i=0; $i < 7; $i++){
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$line.=$newBoard[$y][$i];
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}
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if(strpos($searchValue,$line)){
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return 42;
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}
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//verticaly
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$line="";
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for ($i=0; $i < 6; $i++){
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$line.=$newBoard[$i][$colToPlay];
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}
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if(strpos($searchValue,$line)){
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return 42;
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}
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//diagonal \
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$line="";
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$b = $y + $colToPlay;
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if($b < 6){
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$ix = 0;
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$iy = $b;
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}else{
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$ix = $b - 5;
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$iy = 5;
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}
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for($jx = $ix, $jy = $iy; ($jx < 7) && ($jy > -1); $jx++, $jy--){
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$line.=$newBoard[$jy][$jx];
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}
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if(strpos($searchValue,$line)){
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return 42;
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}
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//diagonal /
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$b = $y - $colToPlay;
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if($b > -1){
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$ix = 0;
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$iy = $b;
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}else{
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$iy=0;
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$ix = -$b;
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}
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$line="";
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for ($jx = $ix , $jy = $iy ; ($jx < 7) && ($jy < 6) ; $jx++ , $jy++){
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$line.=$newBoard[$jy][$jx];
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}
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if(strpos($searchValue,$line)){
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return 42;
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}
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//if grid is full
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$full = true;
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for($i = 0; $i < 7; $i++){
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if($newBoard == "+"){
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$full = false;
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break;
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}
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}
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if($full){
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return 0;
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}
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if($depth < 10){
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return 0 - better_col($newBoard,$opponent,$me,$depth + 1);
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}else{
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return 0;
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}
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}
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function better_col($board,$me,$opponent,$depth){
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$betterScore= -1000;
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$betterCol= -1;
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for( $i = 0; $i < 7; $i++){
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if($board[5][$i] == "+"){
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$sc = score($board,$me,$opponent,$i,$depth);
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if( $sc > $betterScore){
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$betterScore = $sc -$depth;
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$betterCol = $i;
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}
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echo $i." ".$sc."\n";
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}
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}
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return $betterCol;
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}
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//replace "" by " ", it will simplify my code.
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$in=str_replace('""','"+"',file_get_contents('php://input'));
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$params=json_decode($in, TRUE);
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switch($params['action']){
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case "init":
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echo '{"name":"Gnieark"}';
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break;
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case "play-turn":
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//find $opponent
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for($x = 0; $x < 7 ; $x++){
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for($y = 0; $y < 6 ; $y++){
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if(($params['board'][$y][$x] <> "+" ) && ($params['board'][$y][$x] <> $params['you'] )){
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$opponent= $params['board'][$y][$x];
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}
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}
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}
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if((!isset($opponent)) && ($params['you'] == "X")){
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$opponent="O";
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}elseif(!isset($opponent)){
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$opponent="X";
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}
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echo '{"play":"'.better_col($params['board'],$params['you'],$opponent,1).'"}';
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break;
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default:
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break;
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}
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