/**
 * Class LP_User_Item_Meta_DB
 *
 * @since 4.2.5
 * @version 1.0.0
 * @author tungnx
 */
class LP_User_Item_Meta_DB extends LP_Database {
	private static $_instance;

	protected function __construct() {
		parent::__construct();
	}

	public static function getInstance() {
		if ( is_null( self::$_instance ) ) {
			self::$_instance = new self();
		}

		return self::$_instance;
	}

	/**
	 * Get user item metas
	 *
	 * @return array|null|int|string
	 * @throws Exception
	 * @since 4.2.5
	 * @version 1.0.0
	 */
	public function get_user_item_metas( LP_User_Item_Meta_Filter $filter, int &$total_rows = 0 ) {
		$filter->fields = array_merge( $filter->all_fields, $filter->fields );

		if ( empty( $filter->collection ) ) {
			$filter->collection = $this->tb_lp_user_itemmeta;
		}

		if ( empty( $filter->collection_alias ) ) {
			$filter->collection_alias = 'uim';
		}

		if ( ! empty( $filter->meta_id ) ) {
			$filter->where[] = $this->wpdb->prepare( 'AND uim.meta_id = %d', $filter->meta_id );
		}

		if ( ! empty( $filter->learnpress_user_item_id ) ) {
			$filter->where[] = $this->wpdb->prepare( 'AND uim.learnpress_user_item_id = %d', $filter->learnpress_user_item_id );
		}

		if ( ! empty( $filter->meta_key ) ) {
			$filter->where[] = $this->wpdb->prepare( 'AND uim.meta_key = %s', $filter->meta_key );
		}

		if ( ! empty( $filter->meta_value ) ) {
			$filter->where[] = $this->wpdb->prepare( 'AND uim.meta_value = %s', $filter->meta_value );
		}

		if ( ! empty( $filter->extra_value ) ) {
			$filter->where[] = $this->wpdb->prepare( 'AND uim.extra_value = %s', $filter->extra_value );
		}

		$filter = apply_filters( 'lp/user_item_meta/query/filter', $filter );

		return $this->execute( $filter, $total_rows );
	}


	/**
	 * Insert data
	 *
	 * @param array $data [ learnpress_user_item_id, meta_key, meta_value, extra_value ]
	 *
	 * @return int
	 * @throws Exception
	 * @version 1.0.1
	 * @since 4.2.5
	 */
	public function insert_data( array $data ): int {
		$filter = new LP_User_Item_Meta_Filter();
		foreach ( $data as $col_name => $value ) {
			if ( ! in_array( $col_name, $filter->all_fields ) ) {
				unset( $data[ $col_name ] );
			}
		}

		unset( $data['meta_id'] );
		$result = $this->wpdb->insert( $this->tb_lp_user_itemmeta, $data );
		$this->check_execute_has_error();

		return $this->wpdb->insert_id;
	}

	/**
	 * Update data
	 *
	 * @param array $data [ meta_id, learnpress_user_item_id, meta_key, meta_value, extra_value ]
	 *
	 * @return bool
	 *
	 * @throws Exception
	 * @since 4.2.5
	 * @version 1.0.0
	 */
	public function update_data( array $data ): bool {
		if ( empty( $data['meta_id'] ) ) {
			throw new Exception( __( 'Invalid meta id!', 'learnpress' ) . ' | ' . __METHOD__ );
		}

		$filter             = new LP_User_Item_Meta_Filter();
		$filter->collection = $this->tb_lp_user_itemmeta;
		foreach ( $data as $col_name => $value ) {
			if ( ! in_array( $col_name, $filter->all_fields ) ) {
				continue;
			}

			$filter->set[] = $this->wpdb->prepare( $col_name . ' = %s', $value );
		}
		$filter->where[] = $this->wpdb->prepare( 'AND meta_id = %d', $data['meta_id'] );
		$this->update_execute( $filter );

		return true;
	}
}

LP_User_Item_Meta_DB::getInstance();



/**
 * Class LP_Global
 */
class LP_Global {
	/**
	 * @var array
	 */
	public static $users = array();

	/**
	 * @var array
	 */
	public static $courses = array();

	/**
	 * @var array
	 */
	public static $lessons = array();

	/**
	 * @var array
	 */
	public static $quizzes = array();

	/**
	 * @var array
	 */
	public static $questions = array();

	/**
	 * @var bool
	 */
	protected static $_user = false;

	/**
	 * @var bool
	 */
	protected static $_course = false;

	/**
	 * @var bool
	 */
	protected static $_course_item = false;

	/**
	 * @var LP_Profile
	 */
	protected static $_profile = false;

	/**
	 * @var array
	 */
	public static $custom_posts = array();

	/**
	 * @var array
	 *
	 * @since 3.3.0
	 */
	public static $object_support_features = array();

	/**
	 * @return LP_Quiz|LP_Lesson
	 */
	public static function course_item() {
		global $lp_course_item;

		return $lp_course_item;
	}

	public static function set_course_item( $course_item ) {
		global $lp_course_item;

		if ( self::$_course_item === false ) {
			self::$_course_item = $lp_course_item;
		}

		$lp_course_item = $course_item;
	}

	/**
	 * Check if current course item is viewing is a $type
	 *
	 * @param string $type
	 *
	 * @return bool
	 * @deprecated 4.1.7.3
	 */
	/*public static function is_course_item_type( $type ) {
		$item = self::course_item();

		if ( $item ) {
			return $type === get_post_type( $item->get_id() );
		}

		return false;
	}*/

	/**
	 * @param bool $get_only_id
	 * Todo: new call not use $get_only_id, only call LP_Global::courses()
	 * Recommend use learn_press_get_course()
	 *
	 * @editor tungnx
	 * @since 3.0.0
	 * @version 1.0.1
	 * @return LP_Course|bool|int
	 */
	public static function course( $get_only_id = false ) {
		$lp_course = learn_press_get_course();

		// Fix for old version use param $get_only_id
		if ( $get_only_id ) {
			if ( $lp_course ) {
				return $lp_course->get_id();
			} else {
				return 0;
			}
		} else {
			return $lp_course;
		}
	}

	/**
	 * @deprecated 4.1.7.3
	 */
	public static function set_course( $course ) {
		_deprecated_function( __FUNCTION__, '4.1.7.3' );
		global $lp_course;

		if ( self::$_course === false ) {
			self::$_course = $lp_course;
		}
		$lp_course = $course;
	}

	/**
	 * @return LP_User|LP_User_Guest|false
	 */
	public static function user() {
		/**
		 * @see learn_press_setup_user
		 */
		global $lp_user;

		return $lp_user;
	}

	/**
	 * Alias of course item for highlighting in dev
	 *
	 * @return LP_Quiz|bool
	 */
	public static function course_item_quiz() {
		$item = self::course_item();

		return $item instanceof LP_Quiz ? $item : false;
	}

	/**
	 * @return LP_Question
	 */
	public static function quiz_question() {
		global $lp_quiz_question;

		return $lp_quiz_question;
	}

	/**
	 * Reset global variables to default
	 * @deprecated 4.1.7.3
	 */
	public static function reset() {
		_deprecated_function( __FUNCTION__, '4.1.7.3' );
		global $lp_user, $lp_course, $lp_course_item, $lp_quiz_question;

		if ( self::$_user ) {
			$lp_user = self::$_user;
		}

		if ( self::$_course ) {
			$lp_course = self::$_course;
		}

		if ( self::$_course_item ) {
			$lp_course_item = self::$_course_item;
		}
	}

	/**
	 * @param bool $global
	 * @param bool $reset
	 *
	 * @return LP_Profile|WP_Error
	 */
	public static function profile( $global = false, $reset = false ) {
		global $profile;

		return LP_Profile::instance();
	}

	/**
	 * @deprecated 4.2.6.2
	 */
	public static function init() {
		_deprecated_function( __METHOD__, '4.2.6.2' );
		return;
		global $profile;
		self::$_profile = $profile = LP_Profile::instance( get_current_user_id() );
	}

	/**
	 * @param $key
	 *
	 * @return bool|mixed
	 */
	public static function get_custom_posts( $key ) {
		if ( array_key_exists( $key, self::$custom_posts ) ) {
			return self::$custom_posts[ $key ];
		}

		return false;
	}

	/**
	 * @param string $object_type
	 * @param string $feature
	 * @param string $type
	 *
	 * @return mixed
	 * @since 3.3.0
	 *
	 */
	public static function add_object_feature( $object_type, $feature, $type = 'yes' ) {
		$namespace   = explode( '.', $object_type );
		$object_type = $namespace[0];
		$namespace   = isset( $namespace[1] ) ? $namespace[1] : false;

		if ( ! isset( self::$object_support_features[ $object_type ] ) ) {
			self::$object_support_features[ $object_type ] = array();
		}

		if ( $namespace ) {
			if ( ! isset( self::$object_support_features[ $object_type ][ $namespace ] ) ) {
				self::$object_support_features[ $object_type ][ $namespace ] = array();
			}

			return self::$object_support_features[ $object_type ][ $namespace ][ $feature ] = $type === null ? 'yes' : $type;
		}

		return self::$object_support_features[ $object_type ][ $feature ] = $type === null ? 'yes' : $type;
	}

	/**
	 * Checks if an object is support a feature.
	 *
	 * @param string $object_type
	 * @param string $feature
	 * @param mixed $type
	 *
	 * @return bool
	 * @since 3.3.0
	 *
	 */
	public static function object_is_support_feature( $object_type, $feature, $type = null ) {
		$objects     = self::$object_support_features;
		$namespace   = explode( '.', $object_type );
		$object_type = $namespace[0];
		$namespace   = isset( $namespace[1] ) ? $namespace[1] : false;

		if ( empty( $objects[ $object_type ] ) ) {
			return false;
		}

		if ( $namespace && empty( $objects[ $object_type ][ $namespace ] ) ) {
			return false;
		}

		if ( $namespace ) {
			$is_support = array_key_exists( $feature, $objects[ $object_type ][ $namespace ] ) ? true : false;

			if ( $type && $is_support ) {
				return $objects[ $object_type ][ $namespace ][ $feature ] === $type;
			}

			return $is_support;
		}

		$is_support = array_key_exists( $feature, $objects[ $object_type ] ) ? true : false;

		if ( $type && $is_support ) {
			return $objects[ $object_type ][ $feature ] === $type;
		}

		return $is_support;
	}

	/**
	 * Get all features that an object support.
	 *
	 * @param string $object_type
	 *
	 * @return array|mixed
	 * @since 3.3.0
	 *
	 */
	public static function get_object_supports( $object_type ) {
		$namespace   = explode( '.', $object_type );
		$object_type = $namespace[0];
		$namespace   = isset( $namespace[1] ) ? $namespace[1] : false;

		if ( empty( self::$object_support_features[ $object_type ] ) ) {
			return array();
		}

		if ( $namespace ) {
			if ( empty( self::$object_support_features[ $object_type ][ $namespace ] ) ) {
				return array();
			}
		}

		return self::$object_support_features[ $object_type ];
	}
}