<?php
/**
 * Zend Framework (http://framework.zend.com/)
 *
 * @link      http://github.com/zendframework/zf2 for the canonical source repository
 * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd New BSD License
 */

namespace Zend\Console\Prompt;

class Number extends Line
{
    /**
     * @var string
     */
    protected $promptText = 'Please enter a number: ';

    /**
     * @var bool
     */
    protected $allowFloat = false;

    /**
     * @var int
     */
    protected $min;

    /**
     * @var int
     */
    protected $max;

    /**
     * Ask the user for a number.
     *
     * @param string    $promptText     The prompt text to display in console
     * @param bool      $allowEmpty     Is empty response allowed?
     * @param bool      $allowFloat     Are floating (non-decimal) numbers allowed?
     * @param int   $min            Minimum value (inclusive)
     * @param int   $max            Maximum value (inclusive)
     */
    public function __construct(
        $promptText = 'Please enter a number: ',
        $allowEmpty = false,
        $allowFloat = false,
        $min = null,
        $max = null
    ) {
        if ($promptText !== null) {
            $this->setPromptText($promptText);
        }

        if ($allowEmpty !== null) {
            $this->setAllowEmpty($allowEmpty);
        }

        if ($min !== null) {
            $this->setMin($min);
        }

        if ($max !== null) {
            $this->setMax($max);
        }

        if ($allowFloat !== null) {
            $this->setAllowFloat($allowFloat);
        }
    }

    /**
     * Show the prompt to user and return the answer.
     *
     * @return mixed
     */
    public function show()
    {
        /**
         * Ask for a number and validate it.
         */
        do {
            $valid = true;
            $number = parent::show();
            if ($number === "" && !$this->allowEmpty) {
                $valid = false;
            } elseif ($number === "") {
                $number = null;
            } elseif (!is_numeric($number)) {
                $this->getConsole()->writeLine("$number is not a number\n");
                $valid = false;
            } elseif (!$this->allowFloat && (round($number) != $number)) {
                $this->getConsole()->writeLine("Please enter a non-floating number, i.e. " . round($number) . "\n");
                $valid = false;
            } elseif ($this->max !== null && $number > $this->max) {
                $this->getConsole()->writeLine("Please enter a number not greater than " . $this->max . "\n");
                $valid = false;
            } elseif ($this->min !== null && $number < $this->min) {
                $this->getConsole()->writeLine("Please enter a number not smaller than " . $this->min . "\n");
                $valid = false;
            }
        } while (!$valid);

        /**
         * Cast proper type
         */
        if ($number !== null) {
            $number = $this->allowFloat ? (double) $number : (int) $number;
        }

        return $this->lastResponse = $number;
    }

    /**
     * @param  bool $allowEmpty
     */
    public function setAllowEmpty($allowEmpty)
    {
        $this->allowEmpty = $allowEmpty;
    }

    /**
     * @return bool
     */
    public function getAllowEmpty()
    {
        return $this->allowEmpty;
    }

    /**
     * @param int $maxLength
     */
    public function setMaxLength($maxLength)
    {
        $this->maxLength = $maxLength;
    }

    /**
     * @return int
     */
    public function getMaxLength()
    {
        return $this->maxLength;
    }

    /**
     * @param string $promptText
     */
    public function setPromptText($promptText)
    {
        $this->promptText = $promptText;
    }

    /**
     * @return string
     */
    public function getPromptText()
    {
        return $this->promptText;
    }

    /**
     * @param int $max
     */
    public function setMax($max)
    {
        $this->max = $max;
    }

    /**
     * @return int
     */
    public function getMax()
    {
        return $this->max;
    }

    /**
     * @param int $min
     */
    public function setMin($min)
    {
        $this->min = $min;
    }

    /**
     * @return int
     */
    public function getMin()
    {
        return $this->min;
    }

    /**
     * @param  bool $allowFloat
     */
    public function setAllowFloat($allowFloat)
    {
        $this->allowFloat = $allowFloat;
    }

    /**
     * @return bool
     */
    public function getAllowFloat()
    {
        return $this->allowFloat;
    }
}
