<?php

/*

 * This file is part of the Symfony package.

 *

 * (c) Fabien Potencier <fabien@symfony.com>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Sensio\Bundle\DistributionBundle\Configurator;

use Sensio\Bundle\DistributionBundle\Configurator\Step\StepInterface;

/**

 * Configurator.

 *

 * @author Marc Weistroff <marc.weistroff@gmail.com>

 */

class Configurator

{

    protected $filename;

    protected $steps;

    protected $parameters;

    public function __construct($kernelDir)

    {

        $this->kernelDir = $kernelDir;

        $this->filename = $kernelDir.'/config/parameters.ini';

        $this->steps = array();

        $this->parameters = $this->read();

    }

    public function isFileWritable()

    {

        return is_writable($this->filename);

    }

    public function clean()

    {

        if (file_exists($this->getCacheFilename())) {

            @unlink($this->getCacheFilename());

        }

    }

    /**

     * @param StepInterface $step

     */

    public function addStep(StepInterface $step)

    {

        $this->steps[] = $step;

    }

    /**

     * @param integer $index

     *

     * @return StepInterface

     */

    public function getStep($index)

    {

        if (isset($this->steps[$index])) {

            return $this->steps[$index];

        }

    }

    /**

     * @return array

     */

    public function getSteps()

    {

        return $this->steps;

    }

    /**

     * @return array

     */

    public function getParameters()

    {

        return $this->parameters;

    }

    /**

     * @return integer

     */

    public function getStepCount()

    {

        return count($this->steps);

    }

    /**

     * @param array $parameters

     */

    public function mergeParameters($parameters)

    {

        $this->parameters = array_merge($this->parameters, $parameters);

    }

    /**

     * @return array

     */

    public function getRequirements()

    {

        $majors = array();

        foreach ($this->steps as $step) {

            foreach ($step->checkRequirements() as $major) {

                $majors[] = $major;

            }

        }

        return $majors;

    }

    /**

     * @return array

     */

    public function getOptionalSettings()

    {

        $minors = array();

        foreach ($this->steps as $step) {

            foreach ($step->checkOptionalSettings() as $minor) {

                $minors[] = $minor;

            }

        }

        return $minors;

    }

    /**

     * Renders parameters as a string.

     *

     * @return string

     */

    public function render()

    {

        $lines[] = "[parameters]\n";

        foreach ($this->parameters as $key => $value) {

            if (is_integer($value) || is_float($value)) {

            } elseif (is_bool($value)) {

                $value = $value ? 'true' : 'false';

            } elseif (false === strpos($value, '"')) {

                $value = '"'.$value.'"';

            } else {

                throw new \RuntimeException('A value in an ini file can not contain double quotes (").');

            }

            $lines[] = sprintf("    %s=%s\n", $key, $value);

        }

        return implode('', $lines);

    }

    /**

     * Writes parameters to parameters.ini or temporary in the cache directory.

     *

     * @return boolean

     */

    public function write()

    {

        $filename = $this->isFileWritable() ? $this->filename : $this->getCacheFilename();

        return file_put_contents($filename, $this->render());

    }

    /**

     * Reads parameters from file.

     *

     * @return array

     */

    protected function read()

    {

        $filename = $this->filename;

        if (!$this->isFileWritable() && file_exists($this->getCacheFilename())) {

            $filename = $this->getCacheFilename();

        }

        $ret = parse_ini_file($filename, true);

        if (false === $ret || array() === $ret) {

            throw new \InvalidArgumentException(sprintf('The %s file is not valid.', $filename));

        }

        if (isset($ret['parameters']) && is_array($ret['parameters'])) {

            return $ret['parameters'];

        } else {

            return array();

        }

    }

    /**

     * getCacheFilename

     *

     * @return string

     */

    protected function getCacheFilename()

    {

        return $this->kernelDir.'/cache/parameters.ini';

    }

}