<?php

if(!defined('ABSPATH'))
    exit;

add_action('init', 'acfe_options_register');
function acfe_options_register(){
    
    if(!is_admin())
        return;
    
    acf_add_options_page(array(
        'page_title'    => 'Options <span style="word-wrap: break-word;padding: 2px 6px;margin-left:1px;border-radius:2px;background:#555;color: #fff; font-size: 14px;vertical-align: text-bottom;">BETA</span>',
        'menu_title'    => 'Options',
        'menu_slug'     => 'acfe-options',
        'post_id'       => 'acfe-options',
        'parent_slug'   => 'options-general.php',
        'capability'    => 'manage_options',
        'redirect'      => false
    ));
    
}

add_action('admin_init', 'acfe_options_field_group');
function acfe_options_field_group(){
    
    global $pagenow;
    if(empty($pagenow) || $pagenow != 'options-general.php' || !isset($_GET['page']) || $_GET['page'] != 'acfe-options')
        return;
    
    global $wpdb;
    $options = $wpdb->get_results("SELECT * FROM $wpdb->options ORDER BY option_name");
    if(empty($options))
        return;
    
    $acfe_options = array();
    foreach((array) $options as $option){
        if($option->option_name == '')
            continue;
        
        $option_name = esc_attr($option->option_name);
        $acfe_options[] = $option_name;
        
    }
    
    update_option('acfe_options', $acfe_options);
    
    $options = $wpdb->get_results("SELECT * FROM $wpdb->options ORDER BY option_name");
    
    $fields = array();
    foreach((array) $options as $option){
        
        if($option->option_name == '')
            continue;
        
        $option_name = esc_attr($option->option_name);
        $option_value = $option->option_value;
        
        $fields[] = array(
            'field_acfe_option_name' => $option_name,
            'field_acfe_option_value' => $option_value,
        );
        
    }
    
    acf_add_local_field_group(array(
        'key' => 'acfe_group_options',
        'title' => 'Options',
        
        'location' => array(
            array(
                array(
                    'param' => 'options_page',
                    'operator' => '==',
                    'value' => 'acfe-options',
                ),
            ),
        ),
        
        'menu_order' => 0,
        'position' => 'normal',
        'style' => 'seamless',
        'label_placement' => 'top',
        'instruction_placement' => 'label',
        'hide_on_screen' => '',
        'active' => 1,
        'description' => '',
        
        'fields' => array(
            array(
                'label'             => '',
                'key'               => 'field_acfe_options_repeater',
                'name'              => 'acfe_options_repeater',
                'type'              => 'repeater',
                'instructions'      => '',
                'required'          => 0,
                'conditional_logic' => 0,
                'wrapper'           => array(
                    'width' => '',
                    'class' => '',
                    'id' => '',
                ),
                'collapsed'         => '',
                'min'               => 0,
                'max'               => 0,
                'layout'            => 'table',
                'button_label'      => __('Add option'),
                'value'             => $fields,
                'sub_fields'        => array(
                    array(
                        'label' => 'Option name',
                        'key' => 'field_acfe_option_name',
                        'name' => 'acfe_field_option_name',
                        'type' => 'text',
                        'instructions' => '',
                        'required' => 0,
                        'conditional_logic' => 0,
                        'wrapper' => array(
                            'width' => 33,
                            'class' => '',
                            'id' => '',
                        ),
                        'acfe_validate' => '',
                        'acfe_update' => '',
                        'acfe_permissions' => '',
                        'default_value' => '',
                        'placeholder' => '',
                        'prepend' => '',
                        'append' => '',
                        'maxlength' => '',
                    ),
                    array(
                        'label' => 'Option value',
                        'key' => 'field_acfe_option_value',
                        'name' => 'acfe_option_value',
                        'type' => 'text',
                        'instructions' => '',
                        'required' => 0,
                        'conditional_logic' => 0,
                        'wrapper' => array(
                            'width' => '',
                            'class' => '',
                            'id' => '',
                        ),
                        'acfe_validate' => '',
                        'acfe_update' => '',
                        'acfe_permissions' => '',
                        'default_value' => '',
                        'placeholder' => '',
                        'prepend' => '',
                        'append' => '',
                        'maxlength' => '',
                    ),
                ),
            ),
        ),
    ));
    
}

add_filter('acf/prepare_field/key=field_acfe_option_value', 'acfe_options_prepare_value');
function acfe_options_prepare_value($field){
	
	if(is_serialized($field['value'])){
        $field['type'] = 'textarea';
        $field['rows'] = 8;
        $field['disabled'] = true;
        $field['readonly'] = true;
        $field['value'] = print_r(maybe_unserialize($field['value']), true);
    }

    return $field;
    
}

add_action('acf/save_post', 'acfe_options_save', 0);
function acfe_options_save($post_id){

    if($_POST['_acf_post_id'] != 'acfe-options' || empty($_POST['acf']))
        return;
    
    $acfe_options = get_option('acfe_options', array());
    
    foreach($_POST['acf']['field_acfe_options_repeater'] as $option){
        
        $option_key = array_search($option['field_acfe_option_name'], $acfe_options);
        if($option_key !== false)
            unset($acfe_options[$option_key]);
        
        if(!isset($option['field_acfe_option_value']))
            continue;
        
        update_option($option['field_acfe_option_name'], stripslashes($option['field_acfe_option_value']));
        
    }
    
    if(!empty($acfe_options)){
        foreach($acfe_options as $option){
            delete_option($option);
        }
    }
    
    $_POST['acf'] = array();
    return;
    
}