<?php
/**
 * This file belongs to the YIT Framework.
 *
 * This source file is subject to the GNU GENERAL PUBLIC LICENSE (GPL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://www.gnu.org/licenses/gpl-3.0.txt
 */


if ( ! defined( 'ABSPATH' ) ) {
    exit;
} // Exit if accessed directly

if ( ! class_exists( 'YIT_Metabox' ) ) {
    /**
     * YIT Metabox
     *
     * the metabox can be created using this code
     * <code>
     * $args1 = array(
     *      'label'    => __( 'Metabox Label', 'yith-plugin-fw' ),
     *      'pages'    => 'page',   //or array( 'post-type1', 'post-type2')
     *      'context'  => 'normal', //('normal', 'advanced', or 'side')
     *      'priority' => 'default',
     *      'tabs'     => array(
     *                 'settings' => array( //tab
     *                          'label'  => __( 'Settings', 'yith-plugin-fw' ),
     *                          'fields' => array(
     *                          'meta_checkbox' => array(
     *                                 'label'    => __( 'Show title', 'yith-plugin-fw' ),
     *                                 'desc'     => __( 'Choose whether to show title of the page or not.', 'yith-plugin-fw' ),
     *                                 'type'     => 'checkbox',
     *                                 'private'  => false,
     *                                 'std'      => '1'),
     *                            ),
     *                      ),
     *  );
     *
     * $metabox1 = YIT_Metabox( 'yit-metabox-id' );
     * $metabox1->init( $args );
     * </code>
     *
     * @class YIT_Metaboxes
     * @package    Yithemes
     * @since      1.0.0
     * @author     Emanuela Castorina <emanuela.castorina@yithemes.com>
     *
     */

    class YIT_Metabox {

        /**
         * @var string the id of metabox
         *
         * @since 1.0
         */

        public $id;

        /**
         * @var array An array where are saved all metabox settings options
         *
         * @since 1.0
         */
        private $options = array();

        /**
         * @var array An array where are saved all tabs of metabox
         *
         * @since 1.0
         */
        private $tabs = array();

        /**
         * @var object The single instance of the class
         * @since 1.0
         */
        protected static $_instance = array();

        /**
         * Main Instance
         *
         * @static
         *
         * @param $id
         *
         * @return object Main instance
         *
         * @since  1.0
         * @author Antonino Scarfi' <antonino.scarfi@yithemes.com>
         */
        public static function instance( $id ) {
            if ( ! isset( self::$_instance[$id] ) ) {
                self::$_instance[$id] = new self( $id );
            }
            return self::$_instance[$id];
        }

        /**
         * Constructor
         *
         * @param string $id
         *
         * @return \YIT_Metabox
         * @since  1.0
         * @author Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        function __construct( $id = '' ) {
            $this->id = $id;

        }


        /**
         * Init
         *
         * set options and tabs, add actions to register metabox, scripts and save data
         *
         * @param array $options
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function init( $options = array() ) {

            $this->set_options( $options );
            $this->set_tabs();


            add_action( 'add_meta_boxes', array( $this, 'register_metabox' ) );
            add_action( 'save_post', array( $this, 'save_postdata' ) );
            add_action( 'admin_enqueue_scripts', array( $this, 'enqueue' ), 15 );

        }

        /**
         * Enqueue script and styles in admin side
         *
         * Add style and scripts to administrator
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function enqueue() {

            wp_enqueue_media();
            wp_enqueue_style( 'wp-color-picker' );
            wp_enqueue_style( 'yit-plugin-metaboxes', YIT_CORE_PLUGIN_URL . '/assets/css/metaboxes.css' );
            wp_enqueue_style( 'jquery-chosen', YIT_CORE_PLUGIN_URL . '/assets/css/chosen/chosen.css' );
            wp_enqueue_script( 'jquery-ui-datepicker' );
            wp_enqueue_script( 'yit-spinner', YIT_CORE_PLUGIN_URL . '/assets/js/panel.spinner.js', array( 'jquery' ), '0.0.1', true );
            wp_enqueue_script( 'jquery-chosen', YIT_CORE_PLUGIN_URL . '/assets/js/chosen/chosen.jquery.js', array( 'jquery' ), '1.1.0', true );
            wp_enqueue_script( 'ajax-chosen', yit_load_js_file( YIT_CORE_PLUGIN_URL . '/assets/js/chosen/ajax-chosen.jquery.js' ), array( 'jquery' ), '1.1.0', true );
            wp_enqueue_script( 'yit-metabox', YIT_CORE_PLUGIN_URL . '/assets/js/metabox.js', array( 'jquery', 'wp-color-picker' ), '1.0.0', true );
            wp_enqueue_style( 'jquery-ui-overcast', YIT_CORE_PLUGIN_URL . '/assets/css/overcast/jquery-ui-1.8.9.custom.css', false, '1.8.9', 'all' );


        }

        /**
         * Set Options
         *
         * Set the variable options
         *
         * @param array $options
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function set_options( $options = array() ) {
            $this->options = $options;

        }

        /**
         * Set Tabs
         *
         * Set the variable tabs
         *
         * @internal param array $tabs
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function set_tabs() {
            if ( ! isset( $this->options['tabs'] ) ) {
                return;
            }
            $this->tabs = $this->options['tabs'] ;
            if( isset($this->tabs['settings']['fields']) ){
                $this->tabs['settings']['fields'] = array_filter( $this->tabs['settings']['fields'] );
            }
        }


        /**
         * Add Tab
         *
         * Add a tab inside the metabox
         *
         * @internal param array $tabs
         *
         * @param array  $tab    the new tab to add to the metabox
         * @param string $where  tell where insert the tab if after or before a $refer
         * @param null   $refer  an existent tab inside metabox
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function add_tab( $tab, $where = 'after', $refer = null ) {
            if ( ! is_null( $refer ) ) {
                $ref_pos = array_search( $refer, array_keys( $this->tabs ) );
                if ( $ref_pos !== false ) {
                    if ( $where == 'after' ) {
                        $this->tabs = array_slice( $this->tabs, 0, $ref_pos + 1, true ) +
                            $tab +
                            array_slice( $this->tabs, $ref_pos + 1, count( $this->tabs ) - 1, true );
                    }
                    else {
                        $this->tabs = array_slice( $this->tabs, 0, $ref_pos, true ) +
                            $tab +
                            array_slice( $this->tabs, $ref_pos, count( $this->tabs ), true );
                    }
                }
            }
            else {
                $this->tabs = array_merge( $tab, $this->tabs );
            }

        }

        /**
         * Remove Tab
         *
         * Remove a tab from the tabs of metabox
         *
         * @internal param array $tabs
         *
         * @param $id_tab
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function remove_tab( $id_tab ) {
            if ( isset( $this->tabs[$id_tab] ) ) {
                unset ( $this->tabs[$id_tab] );
            }
        }


        /**
         * Add Field
         *
         * Add a field inside a tab of metabox
         *
         * @internal param array $tabs
         *
         * @param string $tab_id the id of the tabs where add the field
         * @param array  $args   the  field to add
         * @param string $where  tell where insert the field if after or before a $refer
         * @param null   $refer  an existent field inside tab
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function add_field( $tab_id, $args, $where = 'after', $refer = null ) {
            if ( isset( $this->tabs[$tab_id] ) ) {

                $cf = $this->tabs[$tab_id]['fields'];
                if ( ! is_null( $refer ) ) {
                    $ref_pos = array_search( $refer, array_keys( $cf ) );
                    if ( $ref_pos !== false ) {
                        if ( $where == 'after' ) {
                            $this->tabs[$tab_id]['fields'] = array_slice( $cf, 0, $ref_pos + 1, true ) +
                                $args +
                                array_slice( $cf, $ref_pos, count( $cf ) - 1, true );

                        } elseif ( $where == 'before' ) {
                            $this->tabs[$tab_id]['fields'] = array_slice( $cf, 0, $ref_pos, true ) +
                                $args +
                                array_slice( $cf, $ref_pos, count( $cf ), true );

                        }
                    }
                }
                else {
                    if ( $where == 'first' ) {
                        $this->tabs[$tab_id]['fields'] = $args + $cf;

                    } else {
                        $this->tabs[$tab_id]['fields'] = array_merge( $this->tabs[$tab_id]['fields'], $args );
                    }
                }

            }


        }

        /**
         * Remove Field
         *
         * Remove a field from the metabox, search inside the tabs and remove it if exists
         *
         * @param $id_field
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function remove_field( $id_field ) {
            foreach ( $this->tabs as $tab_name => $tab ) {
                if ( isset( $tab['fields'][$id_field] ) ) {
                    unset ( $this->tabs[$tab_name]['fields'][$id_field] );
                }
            }
        }

        /**
         * Reorder tabs
         *
         * Order the tabs and fields and set id and name to each field
         *
         * @internal param $id_field
         *
         * @return void
         * @since  1.0
         * @author Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function reorder_tabs() {
            foreach ( $this->tabs as $tab_name => $tab ) {
                foreach ( $tab['fields'] as $id_field => $field ) {
                    $this->tabs[$tab_name]['fields'][$id_field]['private'] = ( isset( $field['private'] ) ) ? $field['private'] : true;
                    $this->tabs[$tab_name]['fields'][$id_field]['id']      = $this->get_option_metabox_id( $id_field, $this->tabs[$tab_name]['fields'][$id_field]['private'] );
                    $this->tabs[$tab_name]['fields'][$id_field]['name']    = $this->get_option_metabox_name( $this->tabs[$tab_name]['fields'][$id_field]['id'] );
                }
            }

        }


        /**
         * Get Option Metabox ID
         *
         * return the id of the field
         *
         * @param string $id_field
         * @param bool $private if private add an _befor the id
         *
         * @return string
         * @since  1.0
         * @author Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function get_option_metabox_id( $id_field, $private = true ) {
            if ( $private ) {
                return '_' . $id_field;
            }
            else {
                return $id_field;
            }
        }

        /**
         * Get Option Metabox Name
         *
         * return the name of the field, this name will be used as attribute name of the input field
         *
         * @param string $id_field
         * @param bool $private if private add an _befor the id
         *
         * @return string
         * @since  1.0
         * @author Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function get_option_metabox_name( $id_field, $private = true ) {
            $db_name = apply_filters( 'yit_metaboxes_option_main_name', 'yit_metaboxes' );
            $return  = $db_name . '[';

            if ( ! strpos( $id_field, '[' ) ) {
                return $return . $id_field . ']';
            }
            $return .= substr( $id_field, 0, strpos( $id_field, '[' ) );
            $return .= ']';
            $return .= substr( $id_field, strpos( $id_field, '[' ) );

            return $return;
        }

        /**
         * Register the metabox
         *
         * call the wp function add_metabox to add the metabox
         *
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function register_metabox( $post_type ) {
            if( in_array( $post_type, (array) $this->options['pages'] ) ){
                add_meta_box( $this->id, $this->options['label'], array( $this, 'show' ), $post_type, $this->options['context'], $this->options['priority'] );
            }
        }

        /**
         * Show metabox
         *
         * show the html of metabox
         *
         *
         * @return void
         * @since    1.0
         * @author   Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function show() {
            $this->reorder_tabs();

            yit_plugin_get_template( YIT_CORE_PLUGIN_PATH, 'metaboxes/tab.php', array( 'tabs' => $this->tabs ) );
        }

        /**
         * Save Post Data
         *
         * Save the post data in the database when save the post
         *
         * @param $post_id
         *
         * @return int
         * @since  1.0
         * @author Emanuela Castorina <emanuela.castorina@yithemes.it>
         */
        public function save_postdata( $post_id ) {



            if ( ! isset( $_POST['yit_metaboxes_nonce'] ) || ! wp_verify_nonce( $_POST['yit_metaboxes_nonce'], 'metaboxes-fields-nonce' ) ) {
                return $post_id;
            }


            if ( ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) || ( defined( 'DOING_AJAX' ) && DOING_AJAX ) ) {
                return $post_id;
            }

            if ( isset( $_POST['post_type'] ) ) {
                $post_type = $_POST['post_type'];
            }
            else {
                return $post_id;
            }

            if ( 'page' == $post_type ) {
                if ( ! current_user_can( 'edit_page', $post_id ) ) {
                    return $post_id;
                }
            }
            else {
                if ( ! current_user_can( 'edit_post', $post_id ) ) {
                    return $post_id;
                }
            }

            $this->reorder_tabs();


            foreach ( $this->tabs as $tab ) {

                foreach ( $tab['fields'] as $field ) {

                    if ( in_array( $field['type'], array( 'title' ) ) ) {
                        continue;
                    }

                    if ( isset( $_POST['yit_metaboxes'][$field['id']] ) ) {

                        add_post_meta( $post_id, $field['id'], $_POST['yit_metaboxes'][$field['id']], true ) || update_post_meta( $post_id, $field['id'], $_POST['yit_metaboxes'][$field['id']] );
                    }
                    elseif ( in_array( $field['type'], array( 'onoff', 'checkbox' ) ) ) {
                        add_post_meta( $post_id, $field['id'], '0', true ) || update_post_meta( $post_id, $field['id'], '0' );
                    }
                    else {
                        delete_post_meta( $post_id, $field['id'] );
                    }
                }
            }

        }

        /**
         * Remove Fields
         *
         * Remove a fields list from the metabox, search inside the tabs and remove it if exists
         *
         * @param $id_fields
         *
         * @return   void
         * @since    2.0.0
         * @author   Andrea Grillo <andrea.grillo@yithemes.com>
         */
        public function remove_fields( $id_fields ) {
            foreach ( $id_fields as $k => $field ) {
                $this->remove_field( $field );
            }
        }
    }
}

if ( ! function_exists( 'YIT_Metabox' ) ) {

    /**
     * Main instance of plugin
     *
     * @param $id
     *
     * @return \YIT_Metabox
     * @since  1.0
     * @author Emanuela Castorina <emanuela.castorina@yithemes.it>
     */


    function YIT_Metabox( $id ) {
        return YIT_Metabox::instance( $id );
    }
}