<?php

/*
* This file is part of the Prophecy.
* (c) Konstantin Kudryashov <ever.zet@gmail.com>
* Marcello Duarte <marcello.duarte@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace Prophecy\Argument;

/**
* Arguments wildcarding.
*
* @author Konstantin Kudryashov <ever.zet@gmail.com>
*/
class ArgumentsWildcard
{
/**
* @var Token\TokenInterface[]
*/
private $tokens = array();
private $string;

/**
* Initializes wildcard.
*
* @param array $arguments Array of argument tokens or values
*/
public function __construct(array $arguments)
{
foreach ($arguments as $argument) {
if (!$argument instanceof Token\TokenInterface) {
$argument = new Token\ExactValueToken($argument);
}

$this->tokens[] = $argument;
}
}

/**
* Calculates wildcard match score for provided arguments.
*
* @param array $arguments
*
* @return false|int False OR integer score (higher - better)
*/
public function scoreArguments(array $arguments)
{
if (0 == count($arguments) && 0 == count($this->tokens)) {
return 1;
}

$arguments = array_values($arguments);
$totalScore = 0;
foreach ($this->tokens as $i => $token) {
$argument = isset($arguments[$i]) ? $arguments[$i] : null;
if (1 >= $score = $token->scoreArgument($argument)) {
return false;
}

$totalScore += $score;

if (true === $token->isLast()) {
return $totalScore;
}
}

if (count($arguments) > count($this->tokens)) {
return false;
}

return $totalScore;
}

/**
* Returns string representation for wildcard.
*
* @return string
*/
public function __toString()
{
if (null === $this->string) {
$this->string = implode(', ', array_map(function ($token) {
return (string) $token;
}, $this->tokens));
}

return $this->string;
}

/**
* @return array
*/
public function getTokens()
{
return $this->tokens;
}
}