<?php
include_once 'models/game.php';

class MoveFactory {
	static function fromMysqlRow($row) {
		$type = $row['type'];
		$move = NULL;
		
		if ($type == 'add_source') {
			$count = $row['param1'];
			$move = new AddFountainMove();
			
		} else if ($type == 'add_horse') {
			$player =   $row['object'];
			$count =    $row['param1'];
			$move = new AddHorseMove($player, $count);
			
		} else if ($type == 'remove_horse') {
			$player =   $row['subject'];
			$fountain = $row['object'];
			$pos =      $row['param1'];
			$length =   $row['param2'];
            $status =   $row['param3'];
			$move = new RemoveHorseMove($fountain, $player, $pos, $length, $status);
				
		} else if ($type == 'place_horse') {
			$player =   $row['subject'];
			$fountain = $row['object'];
			$pos =      $row['param1'];
			$length =   $row['param2'];
            $status =   $row['param3'];
			$move = new PlaceHorseMove($fountain, $player, $pos, $length, $status);
   
        } else if ($type == 'empty_move') {
            $fountain = $row['object'];
            $player = $row['subject'];
            
            $move = new EmptyMove($fountain, $player);

		} else if ($type == 'close_fountain'){
			$fountain = $row['object'];
			$player =   $row['subject'];
			$status =   $row['param3'];
			$move = new CloseFountainMove($fountain, $player, $status);	
		} else if ($type == 'new_fountain'){
            $status = $row['param3'];
            $move = new AddFountainMove($status);
		}
		return $move;
	}
}

/*
move : game_id , round , performed_at , type , object , subject , param1 , param2 , extra
*/
abstract class Move {
	// Don forget call parent::save($game)!
    public function save(Game $game) {
    	$q = sprintf("UPDATE game SET checksum = checksum + 1 WHERE id = %d;", $game->values['id']);
        $game->values['checksum'] += 1;
        query($q);
    }
    
    abstract public function append_to_model(Game $game);
}

class AddHorseMove extends Move {
	public $color;
	public $count;
	
	function __construct($color, $count) {
		$this->color = $color;
		$this->count = $count;
	}
	
	function save(Game $game) {
		parent::save($game);
		
		$query_string = sprintf("INSERT INTO move(game_id, type, object, param1) ".
			"VALUES (%d, 'add_horse', %d, %d);",
			$game->values['id'],
			$this->color,
			$this->count);
		query($query_string);
	}
	
	function append_to_model(Game $game){
    	$game->players[$this->color]->horses += $this->count;
    	return true;    		
    }
}

class PlaceHorseMove extends Move{
    public $fountain;
    public $start;
    public $color;
    public $length;
    public $horse_nr;
      
    function __construct($fountain, $color, $start, $length, $horse_nr){   
        $this->fountain = (int)$fountain;
        $this->color =    (int)$color;
        $this->start =    (int)$start;
        $this->length =   (int)$length;
        $this->horse_nr = (int)$horse_nr;
    }
   
    function save(Game $game){
    	parent::save($game);
    	
		$query_string = sprintf("INSERT INTO move(game_id, type, subject, object, round, param1, param2, param3) ".
			"VALUES (%d, 'place_horse', %d, %d, %d, %d, %d, %d);",
			$game->values['id'],
			$this->color,
			$this->fountain,
			$game->fountains[$this->fountain]->move_count[$this->color],
			$this->start,
			$this->length,
            $this->horse_nr);
		query($query_string);
    } 
    
    function append_to_model(Game $game){
    	// TODO: better error handling
    	if (!isset($game->players[$this->color])) {
    		Log::e("Player with this color isn't logged in.");
    		return false;
    	}
    	
    	if ($game->players[$this->color]->horses < 1) {
    		Log::e("Player with this color isn't logged in.");
    		return false;
    	}
    	
    	if (!$game->validPlaceHorse($this)) {
    		Log::e("No space for new horse.");
    		return false;
    	}
    	
    	global $POINTS_FOR_HORSE;
    	
        $horse_count = $game->fountains[$this->fountain]->move_count[$this->color];
        if($this->horse_nr != -1){  
            $game->players[$this->color]->score -= $POINTS_FOR_HORSE[$horse_count]; 
            $game->players[$this->color]->score += $POINTS_FOR_HORSE[$horse_count+1];
            $game->fountains[$this->fountain]->insertCells($this->color,$this->start,$this->length);
        } else {
            $game->players[$this->color]->score -= $POINTS_FOR_HORSE[$horse_count]; 
            $game->players[$this->color]->score += $POINTS_FOR_HORSE[$horse_count+1];
       	    $game->players[$this->color]->horses--;
            $game->fountains[$this->fountain]->insertCells($this->color,$this->start,$this->length);
        }
        

    	return true;    		
    }
}

class RemoveHorseMove extends Move{
    public $fountain;
    public $start;
    public $color;
    public $length;
    public $horse_nr; 
    function __construct($fountain, $color, $start, $length, $horse_nr){   
        $this->fountain = $fountain;
        $this->color = $color;
        $this->start = $start;
        $this->length = $length;
        $this->horse_nr = $horse_nr;
    }
    
    function save(Game $game){
        parent::save($game);  
		$query_string = sprintf("INSERT INTO move(game_id, type, subject, object, round, param1, param2, param3) ".
			"VALUES (%d, 'remove_horse', %d, %d, %d, %d, %d, %d);",
			$game->values['id'],
			$this->color,
			$this->fountain,
			$game->fountains[$this->fountain]->move_count[$this->color],
			$this->start,
			$this->length,
            $this->horse_nr);
		query($query_string);
        
        $q = sprintf("UPDATE game SET checksum = checksum + 1 WHERE id = %d;", $game->values['id']);
        $game->values['checksum'] += 1;
        query($q);
    } 
    
    function append_to_model(Game $game){
    	// player with this color couldn't participate in game
    	if (!isset($game->players[$this->color])) {
    		Log::e("Player with this color isn't logged in.");
    		return false;
    	}

    	global $POINTS_FOR_HORSE;
        $horse_count = $game->fountains[$this->fountain]->move_count[$this->color];
        if($this->horse_nr != -1){
            // needed if we remove in previously placed horse with different number than the last
           	$game->players[$this->color]->score -= $POINTS_FOR_HORSE[$horse_count];
            $game->players[$this->color]->score += $POINTS_FOR_HORSE[$horse_count-1];
       	    $game->fountains[$this->fountain]->removeCellsWithCount($this->color,$this->start,$this->length,$this->horse_nr);
        } else {
        	$game->players[$this->color]->score -= $POINTS_FOR_HORSE[$horse_count];
        	$game->players[$this->color]->score += $POINTS_FOR_HORSE[$horse_count-1];
        	$game->players[$this->color]->horses+= 1;
            $game->fountains[$this->fountain]->removeCells($this->color,$this->start,$this->length);
        }

        return true;
    }
}

/*
Empty move means that horse count is reduced, but no horses are not placed
Needed in competition
*/
class EmptyMove extends Move {
    public $fountain;
    public $color;
    function __construct($fountain,$color){
        $this->fountain = $fountain;
        $this->color = $color;
    }
    
    function save(Game $game){
        parent::save($game);
       	$query_string = sprintf("INSERT INTO move(game_id, type, object, subject) ".
			"VALUES (%d, 'empty_move', %d, %d);",
			$game->values['id'],
            $this->fountain,
			$this->color);
		query($query_string);
        
        $q = sprintf("UPDATE game SET checksum = checksum + 1 WHERE id = %d;", $game->values['id']);
        $game->values['checksum'] += 1;
        query($q);
    }
    
    function append_to_model(Game $game){
   	    if (!isset($game->players[$this->color])) {
    		Log::e("Player with this color isn't logged in.");
    		return false;
    	}
    	
    	if ($game->players[$this->color]->horses < 1) {
    		Log::e("Can't remove no more horses.");
    		return false;
    	}
        
    	global $POINTS_FOR_HORSE;
    	$horse_count = $game->fountains[$this->fountain]->move_count[$this->color];
        if($horse_count < 1){
            $game->players[$this->color]->horses--;
        } else {
            $game->players[$this->color]->score -= $POINTS_FOR_HORSE[$horse_count];
            $game->players[$this->color]->score += $POINTS_FOR_HORSE[$horse_count-1];
            $game->players[$this->color]->horses--;
        }


        
        
        return true;  
    }
}


class CloseFountainMove extends Move{
    public $fountain;
    public $color;
    public $status;
    
    function __construct($fountain,$color,$status){
        $this->fountain = (int)$fountain;
        $this->color =    (int)$color;
        $this->status =   (int)$status;
    }
    
    function save(Game $game){
    	parent::save($game);
		$query_string = sprintf(
			"INSERT INTO move(game_id, type, subject, object, param3) ".
			"VALUES (%d, 'close_fountain', %d, %d, %d);",
			$game->values['id'],
			$this->color,
			$this->fountain,
			$this->status);// param3 marks if fountain is full or not
		query($query_string);       
    }
    function append_to_model(Game $game){
        if($game->fountains[$this->fountain]->status != $this->status){
            $game->fountains[$this->fountain]->status = $this->status;
            return true;
        }
        return false;
        
    }
}

class AddFountainMove extends Move{
	private $status = 1;
	
    function __construct($status = 1){
    	$this->status = (int)$status;
    }
    
    function save(Game $game){
    	parent::save($game);
    	
    	$query_string = sprintf("INSERT INTO move(game_id, type, param3) ".
			"VALUES (%d, 'new_fountain', %d);",
			$game->values['id'],
			$this->status);
		query($query_string);
    }
    
    function append_to_model(Game $game){
        if($game->addFountain()){
            $game->fountains[] = new Fountain(1);
            return true;
        }
        return false;
    }
}
?>