<?php if ( ! defined( 'ABSPATH' ) ) exit;

/**
 * Class NF_Abstracts_ModelFactory
 */
class NF_Abstracts_ModelFactory
{
    /**
     * Database Object
     *
     * @var
     */
    protected $_db;

    /**
     * The last set object.
     *   Used to create context between two objects in a chain.
     *
     * @var object
     */
    protected $_object;

    /**
     * Fields
     *
     * An array of field model objects.
     *
     * @var array
     */
    protected $_fields = array();

    /**
     * Actions
     *
     * An array of action model objects.
     *
     * @var array
     */
    protected $_actions = array();

    /**
     * Objects
     *
     * An array of generic model objects.
     *
     * @var array
     */
    protected $_objects = array();

    //-----------------------------------------------------
    // Public Methods
    //-----------------------------------------------------

    /**
     * NF_Abstracts_ModelFactory constructor.
     * @param $db
     * @param $id
     */
    public function __construct( $db, $id )
    {
        $this->_db = $db;

        $this->_object = new NF_Database_Models_Form( $this->_db, $id );

        return $this;
    }

    /**
     * Returns the parent object set by the constructor for chained methods.
     *
     * @return object
     */
    public function get()
    {
        return $this->_object;
    }

    /**
     * Get Forms
     *
     * Returns an array of Form Model Objects.
     *
     * @param array $where
     * @return array|bool
     */
    public function get_forms( array $where = array() )
    {
        if( 'form' != $this->_object->get_type() ) return FALSE;

        return $this->_object->find( NULL, $where );
    }

    /**
     * Export Form
     *
     * A wrapper for the Form Model export method.
     *
     * @param bool|FALSE $return
     * @return array
     */
    public function export_form( $return = FALSE )
    {
        $form_id = $this->_object->get_id();

        return NF_Database_Models_Form::export( $form_id, $return );
    }

    /**
     * Import Form
     *
     * A wrapper for the Form Model import method.
     *
     * @param $import
     */
    public function import_form( $import, $id = FALSE, $is_conversion = FALSE )
    {
        $import = maybe_unserialize( $import );
        return NF_Database_Models_Form::import( $import, $id, $is_conversion );
    }

    /*
     * FIELDS
     */

    /**
     * Sets the parent object for chained methods as a Field.
     *
     * @param string $id
     * @return $this
     */
    public function field( $id = '' )
    {
        $form_id = $this->_object->get_id();

        $this->_object = new NF_Database_Models_Field( $this->_db, $id, $form_id );

        return $this;
    }

    /**
     * Returns a field object.
     *
     * @param $id
     * @return NF_Database_Models_Field
     */
    public function get_field( $id )
    {
        $form_id = $this->_object->get_id();

        return $this->_fields[ $id ] = new NF_Database_Models_Field( $this->_db, $id, $form_id );
    }

    /**
     * Returns an array of field objects for the set form (object).
     *
     * @param array $where
     * @param bool|FALSE $fresh
     * @return array
     */
    public function get_fields( $where = array(), $fresh = FALSE)
    {
        if( $where || $fresh || ! $this->_fields ){

            $form_id = $this->_object->get_id();

            $model_shell = new NF_Database_Models_Field( $this->_db, 0 );

            $fields = $model_shell->find( $form_id, $where );

            foreach( $fields as $field ){
                $this->_fields[ $field->get_id() ] = $field;
            }
        }

        usort( $this->_fields, "NF_Abstracts_Field::sort_by_order" );

        return $this->_fields;
    }

    /**
     * Import Field
     *
     * A wrapper for the Form Model import method.
     *
     * @param $import
     */
    public function import_field( $settings, $field_id = '', $is_conversion = FALSE )
    {
        $settings = maybe_unserialize( $settings );
        NF_Database_Models_Field::import( $settings, $field_id, $is_conversion );
    }


    /*
     * ACTIONS
     */

    /**
     * Sets the parent object for chained methods as an Action.
     *
     * @param string $id
     * @return $this
     */
    public function action( $id ='' )
    {
        $form_id = $this->_object->get_id();

        $this->_object = new NF_Database_Models_Action( $this->_db, $id, $form_id );

        return $this;
    }

    /**
     * Returns an action object.
     *
     * @param $id
     * @return NF_Database_Models_Action
     */
    public function get_action( $id )
    {
        $form_id = $this->_object->get_id();

        return $this->_actions[ $id ] = new NF_Database_Models_Action( $this->_db, $id, $form_id );
    }

    /**
     * Returns an array of action objects for the set form (object).
     *
     * @param array $where
     * @param bool|FALSE $fresh
     * @return array
     */
    public function get_actions( $where = array(), $fresh = FALSE)
    {
        if( $where || $fresh || ! $this->_actions ){

            $form_id = $this->_object->get_id();

            $model_shell = new NF_Database_Models_Action( $this->_db, 0 );

            $actions = $model_shell->find( $form_id, $where );

            foreach( $actions as $action ){
                $this->_actions[ $action->get_id() ] = $action;
            }
        }

        usort( $this->_actions, 'NF_Abstracts_Action::sort_actions' );

        return $this->_actions;
    }

    /*
     * OBJECTS
     */

    /**
     * Sets the parent object for chained methods as an Object.
     *
     * @param string $id
     * @return $this
     */
    public function object( $id = '' )
    {
        $parent_id = $this->_object->get_id();
        $parent_type = $this->_object->get_type();

        $this->_object = new NF_Database_Models_Object( $this->_db, $id, $parent_id, $parent_type );

        return $this;
    }

    /**
     * Returns an object.
     *
     * @param $id
     * @return NF_Database_Models_Object
     */
    public function get_object( $id )
    {
        return $this->_objects[ $id ] = new NF_Database_Models_Object( $this->_db, $id );
    }

    /**
     * Returns an array of objects for the set object.
     *
     * @param array $where
     * @param bool|FALSE $fresh
     * @return array
     */
    public function get_objects( $where = array(), $fresh = FALSE)
    {
        if( $where || $fresh || ! $this->_objects ){

            $form_id = $this->_object->get_id();

            $model_shell = new NF_Database_Models_Object( $this->_db, 0 );

            $objects = $model_shell->find( $form_id, $where );

            foreach( $objects as $object ){
                $this->_objects[ $object->get_id() ] = $object;
            }
        }

        return $this->_objects;
    }

    /*
     * SUBMISSIONS
     */

    /**
     * Submission
     *
     * Returns a single submission by ID,
     *   or an empty submission.
     *
     * @param string $id
     * @return $this
     */
    public function sub( $id = '' )
    {
        $form_id = $this->_object->get_id();

        $this->_object = new NF_Database_Models_Submission( $id, $form_id );

        return $this;
    }

    /**
     * Get Submission
     *
     * Returns a single submission by ID.
     *
     * @param $id
     * @return NF_Database_Models_Submission
     */
    public function get_sub( $id )
    {
        $parent_id = $this->_object->get_id();

        return $this->_objects[ $id ] = new NF_Database_Models_Submission( $id, $parent_id );
    }

    /**
     * Get Submissions
     *
     * Returns an array of Submission Model Objects.
     *
     * @param array $where
     * @param bool|FALSE $fresh
     * @return array
     */
    public function get_subs( $where = array(), $fresh = FALSE )
    {
        if( $where || $fresh || ! $this->_objects ){

            $form_id = $this->_object->get_id();

            $model_shell = new NF_Database_Models_Submission( 0 );

            $objects = $model_shell->find( $form_id, $where );

            foreach( $objects as $object ){
                $this->_objects[ $object->get_id() ] = $object;
            }
        }

        return $this->_objects;
    }

    /**
     * Export Submissions
     *
     * A wrapper for the Submission Model export method.
     *
     * @param array $sub_ids
     * @param bool|FALSE $return
     * @return string
     */
    public function export_subs( array $sub_ids = array(), $return = FALSE )
    {
        $form_id = $this->_object->get_id();

        return NF_Database_Models_Submission::export( $form_id, $sub_ids, $return );
    }

    /*
     * GENERIC
     */

    /**
     * Get Model
     *
     * A generic method call for any object model type.
     *
     * @param $id
     * @param $type
     * @return bool|NF_Database_Models_Action|NF_Database_Models_Field|NF_Database_Models_Form|NF_Database_Models_Object
     */
    public function get_model( $id, $type )
    {
        global $wpdb;

        switch( $type ){
            case 'form':
                return new NF_Database_Models_Form( $wpdb, $id );
                break;
            case 'field':
                return new NF_Database_Models_Field( $wpdb, $id );
                break;
            case 'action':
                return new NF_Database_Models_Action( $wpdb, $id );
                break;
            case 'object':
                return new NF_Database_Models_Object( $wpdb, $id );
                break;
            default:
                return FALSE;
        }
    }

} // End Class NF_Abstracts_ModelFactory