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<?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\Token;

use SebastianBergmann\Comparator\ComparisonFailure;
use Prophecy\Comparator\Factory as ComparatorFactory;
use Prophecy\Util\StringUtil;

/**
 * Exact value token.
 *
 * @author Konstantin Kudryashov <ever.zet@gmail.com>
 */
class ExactValueToken implements TokenInterface
{
    private $value;
    private $string;
    private $util;
    private $comparatorFactory;

    /**
     * Initializes token.
     *
     * @param mixed             $value
     * @param StringUtil        $util
     * @param ComparatorFactory $comparatorFactory
     */
    public function __construct($value, StringUtil $util = null, ComparatorFactory $comparatorFactory = null)
    {
        $this->value = $value;
        $this->util  = $util ?: new StringUtil();

        $this->comparatorFactory = $comparatorFactory ?: ComparatorFactory::getInstance();
    }

    /**
     * Scores 10 if argument matches preset value.
     *
     * @param $argument
     *
     * @return bool|int
     */
    public function scoreArgument($argument)
    {
        if (is_object($argument) && is_object($this->value)) {
            $comparator = $this->comparatorFactory->getComparatorFor(
                $argument, $this->value
            );

            try {
                $comparator->assertEquals($argument, $this->value);
                return 10;
            } catch (ComparisonFailure $failure) {
            	return false;
			}
        }

        // If either one is an object it should be castable to a string
        if (is_object($argument) xor is_object($this->value)) {
            if (is_object($argument) && !method_exists($argument, '__toString')) {
                return false;
            }

            if (is_object($this->value) && !method_exists($this->value, '__toString')) {
                return false;
            }
        } elseif (is_numeric($argument) && is_numeric($this->value)) {
            // noop
        } elseif (gettype($argument) !== gettype($this->value)) {
            return false;
        }

        return $argument == $this->value ? 10 : false;
    }

    /**
     * Returns preset value against which token checks arguments.
     *
     * @return mixed
     */
    public function getValue()
    {
        return $this->value;
    }

    /**
     * Returns false.
     *
     * @return bool
     */
    public function isLast()
    {
        return false;
    }

    /**
     * Returns string representation for token.
     *
     * @return string
     */
    public function __toString()
    {
        if (null === $this->string) {
            $this->string = sprintf('exact(%s)', $this->util->stringify($this->value));
        }

        return $this->string;
    }
}