<?php

if ( ! defined( 'ABSPATH' ) ) { die; } // Cannot access directly.

class EPCL_CreateWidget extends WP_Widget {

    // constans
    public $unique  = '';
    public $args    = array(
        'title'       => '',
        'classname'   => '',
        'description' => '',
        'width'       => '',
        'class'       => '',
        'fields'      => array(),
        'defaults'    => array(),
    );

    public function __construct( $key, $params ) {

        $widget_ops  = array();
        $control_ops = array();

        $this->unique = $key;
        $this->args   = apply_filters( "csf_{$this->unique}_args", wp_parse_args( $params, $this->args ), $this );

        // Set control options
        if ( ! empty( $this->args['width'] ) ) {
            $control_ops['width'] = esc_attr( $this->args['width'] );
        }

        // Set widget options
        if ( ! empty( $this->args['description'] ) ) {
            $widget_ops['description'] = esc_attr( $this->args['description'] );
        }

        if ( ! empty( $this->args['classname'] ) ) {
            $widget_ops['classname'] = esc_attr( $this->args['classname'] );
        }

        //Set filters
        $widget_ops  = apply_filters( "csf_{$this->unique}_widget_ops", $widget_ops, $this );
        $control_ops = apply_filters( "csf_{$this->unique}_control_ops", $control_ops, $this );

        parent::__construct( $this->unique, esc_attr( $this->args['title'] ), $widget_ops, $control_ops );

    }

    // Register widget with WordPress
    public static function instance( $key, $params = array() ) {
        return new self( $key, $params );
    }

    // Front-end display of widget.
    public function widget( $args, $instance ) {
        call_user_func( $this->unique, $args, $instance );
    }

    // get default value
    public function get_default( $field ) {

        $default = ( isset( $field['default'] ) ) ? $field['default'] : '';
        $default = ( isset( $this->args['defaults'][$field['id']] ) ) ? $this->args['defaults'][$field['id']] : $default;

        return $default;

    }

    // get widget value
    public function get_widget_value( $instance, $field ) {

        $default = ( isset( $field['id'] ) ) ? $this->get_default( $field ) : '';
        $value   = ( isset( $field['id'] ) && isset( $instance[$field['id']] ) ) ? $instance[$field['id']] : $default;

        return $value;

    }

    // Back-end widget form.
    public function form( $instance ) {

      if ( ! empty( $this->args['fields'] ) ) {

        $class = ( $this->args['class'] ) ? ' '. $this->args['class'] : '';

        echo '<div class="csf csf-widgets csf-fields'. esc_attr( $class ) .'">';

        foreach ( $this->args['fields'] as $field ) {

          $field_unique = '';

          if ( ! empty( $field['id'] ) ) {

            $field_unique = 'widget-' . $this->unique . '[' . $this->number . ']';

            if ( $field['id'] === 'title' ) {
              $field['attributes']['id'] = 'widget-'. $this->unique .'-'. $this->number .'-title';
            }

            $field['default'] = $this->get_default( $field );

          }

          CSF::field( $field, $this->get_widget_value( $instance, $field ), $field_unique );

        }

        echo '</div>';

      }

    }

    // Sanitize widget form values as they are saved.
    public function update( $new_instance, $old_instance ) {

        // auto sanitize
        foreach ( $this->args['fields'] as $field ) {
            if ( ! empty( $field['id'] ) && ( ! isset( $new_instance[$field['id']] ) || is_null( $new_instance[$field['id']] ) ) ) {
                $new_instance[$field['id']] = '';
            }
        }

        $new_instance = apply_filters( "csf_{$this->unique}_save", $new_instance, $this->args, $this );

        do_action( "csf_{$this->unique}_save_before", $new_instance, $this->args, $this );

        return $new_instance;

    }
}