public function __toString()
{
if ($this->hasSunkenShip()) {
return '🔥 ';
}
if ($this->hit()) {
return '💣 ';
}
if ($this->miss()) {
return '💦 ';
}
if ($this->occupied() && $this->ship->startPoint()->equals($this->coords())) {
if ($this->ship->startPoint()->x() == $this->ship->endPoint()->x()) {
return '^ ';
}
return '< ';
}
if ($this->occupied() && $this->ship->endPoint()->equals($this->coords())) {
if ($this->ship->startPoint()->x() == $this->ship->endPoint()->x()) {
return 'v ';
}
return '> ';
}
if ($this->occupied()) {
if ($this->ship->startPoint()->x() == $this->ship->endPoint()->x()) {
return 'ǁ ';
}
return '= ';
}
return ' ';
}
/**
* @param int $width
* @param int $height
* @param array $shipSizes
* @return Fields
*/
public static function generate($width, $height, array $shipSizes)
{
Assertion::integer($width);
Assertion::integer($height);
Assertion::allInteger($shipSizes);
$elements = [];
for ($y = 0; $y < $height; $y++) {
for ($x = 0; $x < $width; $x++) {
$elements[] = Field::generate($x, $y);
}
}
$fields = Fields::create($elements);
foreach ($shipSizes as $shipSize) {
$attempts = 0;
while (true) {
if ($attempts == static::MAX_ATTEMPTS) {
throw new CannotPlaceShipOnGridException();
}
$direction = mt_rand(0, 1) == 0 ? 'right' : 'below';
$spot = Coords::create(mt_rand(0, $width - 1), mt_rand(0, $height - 1));
$endPoint = static::validEndpoint($fields, $spot, $shipSize, $direction);
if ($endPoint === null) {
$attempts++;
continue;
}
// If we end up here the ship can fit at the determined spot
$fields->place(Ship::create($spot, $endPoint));
break;
}
}
return $fields;
}
/**
* @param Ship $ship
*/
public function place(Ship $ship)
{
foreach ($this->elements as $field) {
if ($ship->on($field->coords())) {
$field->place($ship);
}
}
$this->ships[] = $ship;
}
