<?php
// Own namespace
namespace Org\Mxchange\CoreFramework\Criteria\Search;

// Import framework stuff
use Org\Mxchange\CoreFramework\Bootstrap\FrameworkBootstrap;
use Org\Mxchange\CoreFramework\Criteria\BaseCriteria;
use Org\Mxchange\CoreFramework\Criteria\Local\LocalSearchCriteria;

// Import SPL stuff
use \InvalidArgumentException;

/**
 * Search criteria for e.g. searching in databases. Do not use this class if
 * you are looking for a ship or company, or what ever. Instead use this class
 * for looking in storages like the database.
 *
 * @author		Roland Haeder <webmaster@shipsimu.org>
 * @version		0.0.0
 * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2020 Core Developer Team
 * @license		GNU GPL 3.0 or any newer version
 * @link		http://www.shipsimu.org
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
class SearchCriteria extends BaseCriteria implements LocalSearchCriteria {
	/**
	 * Criteria to handle
	 */
	private $criteria = [];

	/**
	 * Limitation for the search
	 */
	private $limit = 0;

	/**
	 * Skip these entries before using them
	 */
	private $skip = 0;

	/**
	 * Protected constructor
	 *
	 * @return	void
	 */
	private function __construct () {
		// Call parent constructor
		parent::__construct(__CLASS__);
	}

	/**
	 * Create an instance of this class
	 *
	 * @return	$criteriaInstance	An instance of this criteria
	 */
	public static final function createSearchCriteria () {
		// Get a new instance
		$criteriaInstance = new SearchCriteria();

		// Return this instance
		return $criteriaInstance;
	}

	/**
	 * Setter for limit
	 *
	 * @param	$limit	Search limit
	 * @return	void
	 * @todo	Find a nice casting here. (int) allows until and including 32766.
	 */
	public final function setLimit (int $limit) {
		$this->limit = $limit;
	}

	/**
	 * "Setter" for limit from a configuration entry
	 *
	 * @param	$configEntry	The configuration entry which hold a number as limit
	 * @return	void
	 */
	public final function setConfiguredLimit (string $configEntry) {
		// Get the limit from config entry and set it
		$limit = FrameworkBootstrap::getConfigurationInstance()->getConfigEntry($configEntry);
		$this->setLimit($limit);
	}

	/**
	 * Getter for limit
	 *
	 * @return	$limit	Search limit
	 */
	public final function getLimit () {
		return $this->limit;
	}

	/**
	 * Setter for skip
	 *
	 * @param	$skip	Search skip
	 * @return	void
	 * @todo	Find a nice casting here. (int) allows until and including 32766.
	 */
	public final function setSkip (int $skip) {
		$this->skip = $skip;
	}

	/**
	 * Getter for skip
	 *
	 * @return	$skip	Search skip
	 */
	public final function getSkip () {
		return $this->skip;
	}

	/**
	 * Checks whether the given key/value pair is matching with 'default' and one of 'choice' and
	 * never with in 'exclude'.
	 *
	 * @param	$key			Key element to check
	 * @param	$value			Value to check
	 * @param	$separator		Separator for "exploding" $value (default: ',')
	 * @return	$isMatching		Whether the key/value is matching or excluded
	 * @throws	InvalidArgumentException	If a parameter is invalid
	 */
	public function isCriteriaMatching (string $key, $value, string $separator = ',') {
		// $key/$value cannot be array/NULL/bool, value can be NULL but then NULL must be loocked for
		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('SEARCH-CRITERIA: key=%s,value[]=%s,separator=%s - CALLED!', $key, gettype($value), $separator));
		if (empty($key)) {
			// Throw IAE
			throw new InvalidArgumentException('Parameter "key" cannot be empty');
		} elseif (is_array($value) || is_bool($value) || is_bool($value) || is_object($value) || is_resource($value)) {
			// Throw it again
			throw new InvalidArgumentException(sprintf('value[]=%s is not supported/valid', gettype($value)));
		} elseif (empty($separator)) {
			// Throw IAE
			throw new InvalidArgumentException('Parameter "separator" cannot be empty');
		}

		// "Explode" value
		$valueArray = explode($separator, $value);

		// Get 'default' search value
		$searchDefault = $this->getCriteriaElemnent($key);

		// 'default' check
		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SEARCH-CRITERIA: getCriteriaElement(' . $key . ')[' . gettype($searchDefault) . ']=' . $searchDefault);
		$isMatching = (
			(
				(
					($searchDefault !== false) &&
					($searchDefault == $value)
				) || (
					is_null($searchDefault) &&
					is_null($value)
				)
			) || (
				$searchDefault === false
			)
		);

		// Get 'choice' search value (can be NULL or $separator-separated string)
		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SEARCH-CRITERIA: getCriteriaElement(' . $key . ')[' . gettype($searchDefault) . ']=' . $searchDefault . ',isMatching=' . intval($isMatching));
		$searchChoice = $this->getCriteriaChoiceElemnent($key);

		// May be false or array
		assert(($searchChoice === false) || (is_array($searchChoice)));

		// 'choice' check
		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SEARCH-CRITERIA: getCriteriaChoiceElement(' . $key . ')[' . gettype($searchChoice) . ']=' . print_r($searchChoice, true));
		if ((is_array($searchChoice)) && (count($valueArray) == 1)) {
			// $value is a single-search value, so use in_[]
			$isMatching = ((($isMatching === true) || (($searchDefault === false) && (!is_null($value)))) && (in_array($value, $searchChoice)));

			// Debug message
			//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SEARCH-CRITERIA: getCriteriaChoiceElement(' . $key . ')[]=' . gettype($searchChoice) . ',value[' . gettype($value) . ']=' . $value . ',isMatching=' . intval($isMatching) . ' - SINGLE-MATCH');
		} elseif ((is_array($searchChoice)) && (count($valueArray) > 1)) {
			// Debug message
			//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SEARCH-CRITERIA: getCriteriaChoiceElement(' . $key . ')[]=' . gettype($searchChoice) . ',value[]=' . count($valueArray) . ',isMatching=' . intval($isMatching));

			// $value is choice-search value, so check all entries
			$isMatching = (($isMatching === true) || (($searchDefault === false) && (!is_null($value))));
			$idx = 0;
			foreach ($valueArray as $idx => $match) {
				// Debug message
				//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SEARCH-CRITERIA: match=' . $match . ',count(searchChoice)=' . count($searchChoice));

				// Is it found? (one is okay)
				$isMatching = (($isMatching === true) && (in_array($match, $searchChoice)));

				// Debug message
				//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SEARCH-CRITERIA: match=' . $match . ',isMatching=' . intval($isMatching));
			} // END - foreach

			// Debug message
			//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SEARCH-CRITERIA: getCriteriaChoiceElement(' . $key . ')[]=' . gettype($searchChoice) . ',value[]=' . count($valueArray) . ',idx=' . $idx . ',isMatching=' . intval($isMatching) . ' - CHOICE-MATCH');
		} else {
			// Choice-match is false
			// Debug message
			//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SEARCH-CRITERIA: getCriteriaChoiceElement(' . $key . ')[]=' . gettype($searchChoice) . ',value[' . gettype($value) . ']=' . $value . ',isMatching=' . intval($isMatching) . ' - false-MATCH');
		}

		// Get 'exclude' search value
		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SEARCH-CRITERIA: getCriteriaChoiceElement(' . $key . ')[]=' . gettype($searchChoice) . ',isMatching=' . intval($isMatching));
		$searchExclude = $this->getCriteriaExcludeElemnent($key);

		// 'exclude' check
		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SEARCH-CRITERIA: getCriteriaExcludeElement(' . $key . ')[' . gettype($searchExclude) . ']=' . $searchExclude);
		$isMatching = (
			(
				(
					$isMatching === true
				) && (
					$searchExclude === false
				)
			) || (
				(
					(
						$isMatching === true
					) && (
						$searchExclude !== false
					) && (
						$searchExclude !== $value
					)
				)
			)
		);

		// Return result
		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SEARCH-CRITERIA: key=' . $key . ',value[' . gettype($value) . ']=' . $value . ',isMatching=' . intval($isMatching) . ' - EXIT!');
		return $isMatching;
	}

}