<?php
// Own namespace
namespace Org\Mxchange\CoreFramework\User;

// Import framework stuff
use Org\Mxchange\CoreFramework\Database\Frontend\User\UserDatabaseWrapper;
use Org\Mxchange\CoreFramework\Database\Updateable;
use Org\Mxchange\CoreFramework\Factory\ObjectFactory;
use Org\Mxchange\CoreFramework\Object\BaseFrameworkSystem;
use Org\Mxchange\CoreFramework\Request\Requestable;
use Org\Mxchange\CoreFramework\Result\Search\SearchableResult;

/**
 * A general user class
 *
 * @author		Roland Haeder <webmaster@shipsimu.org>
 * @version		0.0.0
 * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 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/>.
 */
abstract class BaseUser extends BaseFrameworkSystem implements Updateable {
	// Exception constances
	const EXCEPTION_USERNAME_NOT_FOUND   = 0x150;
	const EXCEPTION_USER_EMAIL_NOT_FOUND = 0x151;
	const EXCEPTION_USER_PASS_MISMATCH   = 0x152;
	const EXCEPTION_USER_IS_GUEST        = 0x153;

	/**
	 * Username of current user
	 */
	private $userName = '';

	/**
	 * User id of current user
	 */
	private $userId = 0;

	/**
	 * Email of current user
	 */
	private $email = '';

	/**
	 * Protected constructor
	 *
	 * @param	$className	Name of the class
	 * @return	void
	 */
	protected function __construct ($className) {
		// Call parent constructor
		parent::__construct($className);
	}

	/**
	 * Setter for username
	 *
	 * @param	$userName	The username to set
	 * @return	void
	 */
	public final function setUserName ($userName) {
		$this->userName = (string) $userName;
	}

	/**
	 * Getter for username
	 *
	 * @return	$userName	The username to get
	 */
	public final function getUserName () {
		return $this->userName;
	}

	/**
	 * Setter for user id
	 *
	 * @param	$userId		The user id to set
	 * @return	void
	 * @todo	Find a way of casting here. "(int)" might destroy the user id > 32766
	 */
	public final function setUserId ($userId) {
		$this->userId = $userId;
	}

	/**
	 * Getter for user id
	 *
	 * @return	$userId	The user id to get
	 */
	public final function getUserId () {
		return $this->userId;
	}

	/**
	 * Setter for email
	 *
	 * @param	$email	The email to set
	 * @return	void
	 */
	protected final function setEmail ($email) {
		$this->email = (string) $email;
	}

	/**
	 * Getter for email
	 *
	 * @return	$email	The email to get
	 */
	public final function getEmail () {
		return $this->email;
	}

	/**
	 * Determines whether the username exists or not
	 *
	 * @return	$exists		Whether the username exists
	 */
	public function ifUsernameExists () {
		// By default the username does not exist
		$exists = false;

		// Is a previous result there?
		if (!$this->getResultInstance() instanceof SearchableResult) {
			// Get a UserDatabaseWrapper instance
			$wrapperInstance = ObjectFactory::createObjectByConfiguredName('user_db_wrapper_class');

			// Create a search criteria
			$criteriaInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');

			// Add the username as a criteria and set limit to one entry
			$criteriaInstance->addCriteria(UserDatabaseWrapper::DB_COLUMN_USERNAME, $this->getUserName());
			$criteriaInstance->setLimit(1);

			// Get a search result
			$resultInstance = $wrapperInstance->doSelectByCriteria($criteriaInstance);

			// Set the index "solver"
			$resultInstance->solveResultIndex(UserDatabaseWrapper::DB_COLUMN_USERID, $wrapperInstance, array($this, 'setUserId'));

			// And finally set it
			$this->setResultInstance($resultInstance);
		} // END - if

		// Rewind it
		$this->getResultInstance()->rewind();

		// Search for it
		if ($this->getResultInstance()->next()) {
			// Entry found
			$exists = true;
		} // END - if

		// Return the status
		return $exists;
	}

	/**
	 * Determines whether the email exists or not
	 *
	 * @return	$exists		Whether the email exists
	 */
	public function ifEmailAddressExists () {
		// By default the email does not exist
		$exists = false;

		// Is a previous result there?
		if (!$this->getResultInstance() instanceof SearchableResult) {
			// Get a UserDatabaseWrapper instance
			$wrapperInstance = ObjectFactory::createObjectByConfiguredName('user_db_wrapper_class');

			// Create a search criteria
			$criteriaInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');

			// Add the username as a criteria and set limit to one entry
			$criteriaInstance->addCriteria(UserDatabaseWrapper::DB_COLUMN_EMAIL, $this->getEmail());
			$criteriaInstance->setLimit(1);

			// Get a search result
			$resultInstance = $wrapperInstance->doSelectByCriteria($criteriaInstance);

			// Set the index "solver"
			$resultInstance->solveResultIndex(UserDatabaseWrapper::DB_COLUMN_USERID, $wrapperInstance, array($this, 'setUserId'));

			// And finally set it
			$this->setResultInstance($resultInstance);
		} // END - if

		// Rewind it
		$this->getResultInstance()->rewind();

		// Search for it
		if ($this->getResultInstance()->next()) {
			// Entry found
			$exists = true;

			// Is the username set?
			if ($this->getUserName() == '') {
				// Get current entry
				$currEntry = $this->getResultInstance()->current();

				// Set the username
				$this->setUserName($currEntry['username']);
			} // END - if
		} // END - if

		// Return the status
		return $exists;
	}

	/**
	 * Checks if supplied password hash in request matches with the stored in
	 * database.
	 *
	 * @param	$requestInstance	A Requestable class instance
	 * @return	$matches			Whether the supplied password hash matches
	 */
	public function ifPasswordHashMatches (Requestable $requestInstance) {
		// By default nothing matches... ;)
		$matches = false;

		// Is a previous result there?
		if ((!$this->getResultInstance() instanceof SearchableResult) || ($this->getResultInstance()->count() == 0)) {
			// Get a UserDatabaseWrapper instance
			$wrapperInstance = ObjectFactory::createObjectByConfiguredName('user_db_wrapper_class');

			// Create a search criteria
			$criteriaInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');

			// Add the username as a criteria and set limit to one entry
			$criteriaInstance->addCriteria(UserDatabaseWrapper::DB_COLUMN_USERNAME, $this->getUserName());
			$criteriaInstance->setLimit(1);

			// Get a search result
			$resultInstance = $wrapperInstance->doSelectByCriteria($criteriaInstance);

			// Set the index "solver"
			$resultInstance->solveResultIndex(UserDatabaseWrapper::DB_COLUMN_USERID, $wrapperInstance, array($this, 'setUserId'));

			// And finally set it
			$this->setResultInstance($resultInstance);
		} // END - if

		// Rewind it and advance to first entry
		$this->getResultInstance()->rewind();

		// This call set the result instance to a clean state
		$this->getResultInstance()->next();

		// Search for it
		if ($this->getResultInstance()->find('pass_hash')) {
			// So does the hashes match?
			//* DEBUG: */ echo $requestInstance->getRequestElement('pass_hash') . '<br />' . $this->getResultInstance()->getFoundValue() . '<br />';
			$matches = ($requestInstance->getRequestElement('pass_hash') === $this->getResultInstance()->getFoundValue());
		} // END - if

		// Return the status
		return $matches;
	}

	/**
	 * "Getter" for user's password hash
	 *
	 * @return	$passHash	User's password hash from database result
	 */
	public final function getPasswordHash () {
		// Default is missing password hash
		$passHash = NULL;

		// Get a database entry
		$entry = $this->getDatabaseEntry();

		// Is the password hash there?
		if (isset($entry['pass_hash'])) {
			// Get it
			$passHash = $entry['pass_hash'];
		} // END - if

		// And return the hash
		return $passHash;
	}

	/**
	 * Getter for primary key value
	 *
	 * @return	$primaryValue	Value of the primary key based on database type
	 */
	public final function getPrimaryKey () {
		// Get a user database wrapper
		$wrapperInstance = ObjectFactory::createObjectByConfiguredName('user_db_wrapper_class');

		// Get the primary key back from the wrapper
		$primaryKey = $wrapperInstance->getPrimaryKeyValue();

		// Get that field
		$primaryValue = $this->getField($primaryKey);

		// Return the value
		return $primaryValue;
	}

	/**
	 * Updates a given field with new value
	 *
	 * @param	$fieldName		Field to update
	 * @param	$fieldValue		New value to store
	 * @return	void
	 * @todo	Try to make this method more generic so we can move it in BaseFrameworkSystem
	 */
	public function updateDatabaseField ($fieldName, $fieldValue) {
		// Get a critieria instance
		$searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');

		// Add search criteria
		$searchInstance->addCriteria(UserDatabaseWrapper::DB_COLUMN_USERNAME, $this->getUserName());
		$searchInstance->setLimit(1);

		// Now get another criteria
		$updateInstance = ObjectFactory::createObjectByConfiguredName('update_criteria_class');

		// Add criteria entry which we shall update
		$updateInstance->addCriteria($fieldName, $fieldValue);

		// Add the search criteria for searching for the right entry
		$updateInstance->setSearchInstance($searchInstance);

		// Set wrapper class name
		$updateInstance->setWrapperConfigEntry('user_db_wrapper_class');

		// Remember the update in database result
		$this->getResultInstance()->add2UpdateQueue($updateInstance);
	}

	/**
	 * Checks whether the user status is 'confirmed'
	 *
	 * @return	$isConfirmed	Whether the user status is 'confirmed'
	 */
	public function isConfirmed () {
		// Determine it
		$isConfirmed = ($this->getField(UserDatabaseWrapper::DB_COLUMN_USER_STATUS) == $this->getConfigInstance()->getConfigEntry('user_status_confirmed'));

		// Return it
		return $isConfirmed;
	}

	/**
	 * Checks whether the user status is 'guest'
	 *
	 * @return	$isGuest	Whether the user status is 'guest'
	 */
	public function isGuest () {
		// Determine it
		$isGuest = ($this->getField(UserDatabaseWrapper::DB_COLUMN_USER_STATUS) == $this->getConfigInstance()->getConfigEntry('user_status_guest'));

		// Return it
		return $isGuest;
	}

}