<?php
/**
 * Admin Class
 * Handles the admin side functionality of plugin
 *
 * @package WebCodexWorld Events Manager
 * @since 1.0.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

class EM_WCW_Admin {

	function __construct() {

		// Action to register admin menu
		add_action( 'admin_menu', array( $this, 'em_wcw_register_menu' ) );

		// Post Type Suggestion Ajax
		add_action( 'wp_ajax_em_wcw_post_suggestions', array( $this, 'em_wcw_post_suggestions' ) );

		// Ajax action to get categories based on search
		add_action( 'wp_ajax_em_wcw_category_sugg', array( $this, 'em_wcw_category_sugg' ) );

		// Ajax for date preview
		add_action( 'wp_ajax_em_wcw_date_preview', array( $this, 'em_wcw_date_preview' ) );

		// Events post type columns
		add_filter( 'manage_' . EM_WCW_EVENT_POST_TYPE . '_posts_columns', array( $this, 'em_wcw_add_event_columns' ) );
		add_action( 'manage_' . EM_WCW_EVENT_POST_TYPE . '_posts_custom_column', array( $this, 'em_wcw_render_event_columns' ), 10, 2 );
		add_filter( 'hidden_columns', array( $this, 'em_wcw_default_hidden_columns' ), 10, 3 );
	}

	/**
	 * Function to register admin menus
	 *
	 * @since 1.0
	 */
	function em_wcw_register_menu() {
		
		// All Layouts Page
		add_submenu_page( 'edit.php?post_type=' . EM_WCW_EVENT_POST_TYPE, __('Layout Builder - Events Manager', 'webcodexworld-events-manager'), __('Layout Builder', 'webcodexworld-events-manager'), 'manage_options', 'em-wcw-layouts', array($this, 'em_wcw_render_all_layouts') );

		// Settings Page
		add_submenu_page( 'edit.php?post_type=' . EM_WCW_EVENT_POST_TYPE, __( 'Settings - Events Manager', 'webcodexworld-events-manager' ), __( 'Settings', 'webcodexworld-events-manager' ), 'manage_options', 'em-wcw-settings', array( $this, 'em_wcw_render_settings' ) );

		// Shortcode Preview
		add_submenu_page( 'options.php', __('Shortcode Preview - Events Manager', 'webcodexworld-events-manager'), __('Shortcode Preview', 'webcodexworld-events-manager'), 'manage_options', 'em-wcw-layout-preview', array($this, 'em_wcw_render_shortcode_preview') );
	}

	/**
	 * Layouts Page
	 * 
	 * @since 1.0
	 */
	function em_wcw_render_all_layouts() {
		
		if( isset( $_GET['action'] ) && ('add' == $_GET['action'] || 'edit' == $_GET['action']) ) {
			include_once( EM_WCW_DIR . '/includes/layout-builder/add-layout.php' );
		} else {
			include_once( EM_WCW_DIR . '/includes/layout-builder/class-em-wcw-layout-list.php' );
		}
	}

	/**
	 * Plugin Setting Page
	 *
	 * @since 1.0
	 */
	function em_wcw_render_settings() {
		include_once( EM_WCW_DIR . '/includes/admin/settings/em-wcw-settings.php' );
	}

	/**
	 * Handle plugin shoercode preview
	 * 
	 * @since 1.0
	 */
	function em_wcw_render_shortcode_preview() {
	}

	/**
	 * Ajax Post Suggestions.
	 *
	 * @since 1.0.0
	 */
	function em_wcw_post_suggestions() {

		// Taking some variables from ajax request
		$return		= array();
		$prefix		= EM_WCW_META_PREFIX;
		$nonce		= isset( $_GET['nonce'] )		? em_wcw_clean( $_GET['nonce'] )		: '';
		$search		= isset( $_GET['search'] )		? em_wcw_clean( $_GET['search'] )		: '';
		$post_type	= isset( $_GET['post_type'] )	? em_wcw_clean( $_GET['post_type'] )	: '';

		// Checking nonce and required variables
		if( $post_type && $search && wp_verify_nonce( $nonce, 'em-wcw-post-title-sugg' ) ) {

			$args = array(
						's'							=> $search,
						'post_type'					=> $post_type,
						'post_status'				=> 'publish',
						'order'						=> 'ASC',
						'orderby'					=> 'title',
						'posts_per_page'			=> 20,
						'no_found_rows'				=> true,
						'cache_results'				=> false,
						'update_post_meta_cache'	=> false,
						'update_post_term_cache'	=> false,
						'lazy_load_term_meta'		=> false,
					);

			// If number is passed
			if( is_numeric( $search ) ) {
				$args['s'] = false;
				$args['p'] = $search;
			}

			$search_query = get_posts( $args );

			if( $search_query ) :

				foreach ( $search_query as $search_data ) {

					$post_title	= ! empty( $search_data->post_title ) ? $search_data->post_title : esc_html__('Post', 'webcodexworld-events-manager');
					$post_title	= $post_title . " - (#{$search_data->ID})";

					$return[]	= array( $search_data->ID, $post_title );
				}

			endif;

		} else {
			wp_send_json_error( array( 'message' => __( 'Sorry, Something happened wrong.', 'webcodexworld-events-manager' ) ) );
		}

		wp_send_json( $return );
	}

	/**
	 * Ajax Category Suggestion.
	 * 
	 * @since 1.0.0
	 */
	function em_wcw_category_sugg() {

		// Taking some defaults
		$result		= array();
		$taxonomy	= isset( $_GET['taxonomy'] )	? em_wcw_clean( $_GET['taxonomy'] )	: EM_WCW_EVENT_CAT;
		$search		= isset( $_GET['search'] )		? em_wcw_clean( $_GET['search'] )		: '';
		$nonce		= isset( $_GET['nonce'] )		? em_wcw_clean( $_GET['nonce'] )		: '';

		if( ! empty( $taxonomy ) && $search && wp_verify_nonce( $nonce, 'em_wcw_category_sugg_nonce' ) ) {

			$terms_args = array(
									'taxonomy'		=> $taxonomy,
									'orderby'		=> 'name',
									'order'			=> 'ASC',
									'number'		=> 25,
									'fields'		=> 'id=>name',
									'hide_empty'	=> false,
								);

			if( ctype_digit( $search ) ) {
				$terms_args['include'] = $search;
			} else {
				$terms_args['search'] = $search;
			}

			$terms = get_terms( $terms_args );

			if( ! empty( $terms ) && ! is_wp_error( $terms ) ) {
				foreach ( $terms as $term_id => $term ) {
					
					$term_title	= ( $term != '' ) ? $term : __('Category', 'webcodexworld-events-manager');
					$term_title	= $term_title . " - (#{$term_id})";

					$result[]	= array( $term_id, $term_title );
				}
			}

			$result = apply_filters( 'em_wcw_category_sugg', $result );
		}

		wp_send_json( $result );
	}

	/**
	 * Ajax callback for date format preview.
	 *
	 * @since 1.0.0
	 */
	function em_wcw_date_preview() {

		check_ajax_referer( 'em_wcw_date_prev_nonce', 'nonce' );

		$date_format	= isset( $_POST['date_format'] ) ? em_wcw_clean( $_POST['date_format'] ) : '';
		$preview		= date_i18n( sanitize_option( 'date_format', wp_unslash( $date_format ) ) );

		wp_send_json_success( array( 'preview' => $preview ) );
	}

	/**
	 * Add custom columns to the events list table.
	 *
	 * @since 1.0.0
	 */
	 function em_wcw_add_event_columns( $columns ) {

		$new_columns = array(
			'em_wcb_start_date'	=> __( 'Start Date', 'webcodexworld-events-manager' ),
			'em_wcb_end_date'	=> __( 'End Date', 'webcodexworld-events-manager' ),
		);

		$columns = em_wcw_add_array( $columns, $new_columns, 1, true );

		return $columns;
	}

	/**
	 * Render custom columns content for the events list table.
	 *
	 * @since 1.0.0
	 */
	 function em_wcw_render_event_columns( $column, $post_id ) {

		// Getting all the general meta for the event as most of the custom columns are based on that.
		$prefix			= EM_WCW_META_PREFIX;
		$start_date		= get_post_meta( $post_id, $prefix.'start_date', true );
		$end_date		= get_post_meta( $post_id, $prefix.'end_date', true );

		switch ( $column ) {
			case 'em_wcb_start_date':
				$start_date = isset( $start_date ) ? $start_date : '';
				echo esc_html( $start_date );
				break;

			case 'em_wcb_end_date':
				$end_date = isset( $end_date ) ? $end_date : '';
				echo esc_html( $end_date );
				break;
		}
	}

	/**
	 * Hide some columns default. We are not removing them forcefully.
	 * User can still enable from `Screen Options` and see the data.
	 *
	 * @since 1.0.0
	 */
	function em_wcw_default_hidden_columns( $hidden, $screen, $use_defaults ) {

		// Event Post Type
		if ( $screen->id === 'edit-'.EM_WCW_EVENT_POST_TYPE ) {

			$hidden[] = 'author';
			$hidden[] = 'comments';
		}

		return $hidden;
	}
}