<?php

/**
 * Tags Widget.
 *
 * @link    https://aiopodcasting.com
 * @since   1.0.0
 *
 * @package AiO_Podcast_Studio
 */

// Exit if accessed directly
if ( ! defined( 'WPINC' ) ) {
	die;
}

/**
 * AIOPOD_Widget_Tags class.
 *
 * @since 1.0.0
 */
class AIOPOD_Widget_Tags extends WP_Widget {
	
	/**
     * Unique identifier for the widget.
     *
     * @since  1.0.0
	 * @access protected
     * @var    string
     */
    protected $widget_slug;
	
	/**
     * Widget fields.
     *
     * @since  1.0.0
	 * @access private
     * @var    array
     */
	private $fields;

	/**
     * Default settings.
     *
     * @since  1.0.0
	 * @access private
     * @var    array
     */
    private $defaults;
	
	/**
	 * Get things started.
	 *
	 * @since 1.0.0
	 */
	public function __construct() {		
		$this->widget_slug = 'aiopod-widget-tags';		
		$this->fields      = $this->get_fields();
		$this->defaults    = $this->get_defaults();
		
		parent::__construct(
			$this->widget_slug,
			__( 'AIOPOD - Tags', 'aio-podcast-studio' ),
			array(
				'classname'   => $this->widget_slug,
				'description' => __( 'Display a list of your episode tags.', 'aio-podcast-studio' )
			)
		);		
	}

	/**
	 * Outputs the content of the widget.
	 *
	 * @since 1.0.0
	 * @param array	$args	  The array of form elements.
	 * @param array $instance The current instance of the widget.
	 */
	public function widget( $args, $instance ) {
		// Merge incoming $instance array with $defaults
		if ( count( $instance ) ) {
			$attributes = array_merge( $this->defaults, $instance );
		} else {
			$attributes = $this->defaults;
		}

		$attributes = $this->resolve_attributes( $attributes );	

		$widget_args = $args;			

		// Enqueue dependencies
		wp_enqueue_style( AIOPOD_PLUGIN_SLUG . '-public' );
		wp_enqueue_script( AIOPOD_PLUGIN_SLUG . '-public' );
		
		// Process output
		echo wp_kses_post( $widget_args['before_widget'] );

		if ( ! empty( $instance['title'] ) ) {
			echo wp_kses_post( $widget_args['before_title'] . apply_filters( 'widget_title', $instance['title'] ) . $widget_args['after_title'] );
		}

		include apply_filters( 'aiopod_load_template', AIOPOD_PLUGIN_DIR . 'public/templates/tags/tags-' . sanitize_file_name( $attributes['layout'] ) . '.php', $attributes );

		echo wp_kses_post( $widget_args['after_widget'] );
	}
	
	/**
	 * Processes the widget's options to be saved.
	 *
	 * @since 1.0.0
	 * @param array	$new_instance The new instance of values to be generated via the update.
	 * @param array $old_instance The previous instance of values before the update.
	 */
	public function update( $new_instance, $old_instance ) {
		$instance = $old_instance;		

		$instance['title'] = isset( $new_instance['title'] ) ? strip_tags( $new_instance['title'] ) : '';
		
		foreach ( $this->fields['tags']['sections'] as $section ) {
			foreach ( $section['fields'] as $field ) {
				$field_name = $field['name'];

				if ( 'number' === $field['type'] ) {
					if ( ! empty( $new_instance[ $field_name ] ) ) {
						$instance[ $field_name ] = ( false === strpos( $new_instance[ $field_name ], '.' ) ) ? (int) $new_instance[ $field_name ] : (float) $new_instance[ $field_name ];
					} else {
						$instance[ $field_name ] = 0;
					}
				} elseif ( 'url' === $field['type'] ) {
					$instance[ $field_name ] = ! empty( $new_instance[ $field_name ] ) ? aiopod_sanitize_url( $new_instance[ $field_name ] ) : '';
				} elseif ( 'checkbox' === $field['type'] ) {
					$instance[ $field_name ] = isset( $new_instance[ $field_name ] ) ? (int) $new_instance[ $field_name ] : 0;
				} else {
					$instance[ $field_name ] = ! empty( $new_instance[ $field_name ] ) ? sanitize_text_field( $new_instance[ $field_name ] ) : '';
				}
			}
		}
		
		return $instance;
	}
	
	/**
	 * Generates the administration form for the widget.
	 *
	 * @since 1.0.0
	 * @param array $instance The array of keys and values for the widget.
	 */
	public function form( $instance ) {
		// Parse incoming $instance into an array and merge it with $defaults
		$instance = wp_parse_args(
			(array) $instance,
			$this->defaults
		);
			
		// Display the admin form
		include AIOPOD_PLUGIN_DIR . 'widgets/forms/tags.php';
	}

	/**
	 * Resolves attributes into a valid, final configuration.
	 * 
	 * This method guarantees that the returned attributes array is safe,
	 * consistent, and ready for query building and rendering.
	 *
	 * @since  1.0.0
	 * @param  array $attributes Raw attributes merged from defaults and user input.
	 * @return array             Fully resolved attributes array.
	 */
	private function resolve_attributes( $attributes ) {
		// Title
		$attributes['title'] = '';

		// Layout
		if ( ! in_array( $attributes['layout'], array( 'cloud', 'list', 'dropdown' ) ) ) {
			$attributes['layout'] = 'cloud';
		}
		
		// Return resolved array
		return $attributes;
	}

	/**
	 * Get the form fields.
	 *
	 * @since  1.0.0
	 * @access private
	 * @return array   An associative array of fields.
	 */
	private function get_fields() {
		if ( empty( $this->fields ) ) {
			$this->fields = aiopod_get_shortcode_fields();
		}

		return $this->fields;
	}

	/**
	 * Get the default attribute values.
	 *
	 * @since  1.0.0
	 * @access private
	 * @return array  An associative array of attributes.
	 */
	private function get_defaults() {
		if ( empty( $this->defaults ) ) {
			foreach ( $this->fields['tags']['sections'] as $section ) {
				foreach ( $section['fields'] as $field ) {
					$this->defaults[ $field['name'] ] = $field['value'];
				}
			}
			
			$this->defaults['source']        = 'tags';
			$this->defaults['title']         = __( 'Tags', 'aio-podcast-studio' );
			$this->defaults['include']       = '';	
			$this->defaults['exclude']       = '';
			$this->defaults['hide_if_empty'] = 0;	
		}

		return $this->defaults;
	}
	
}