<?php

namespace Kirki\Ajax;

use Kirki\HelperFunctions;

class Users {
	/**
	 * Get users data based on the query
	 *
	 * @return void wp_send_json($users);
	 */

	public static function get_users_of_collection() {
		$inherit     = HelperFunctions::sanitize_text( $_GET['inherit'] ?? null );
		$post_parent = HelperFunctions::sanitize_text( $_GET['post_parent'] ?? null );

		$sorting_param = HelperFunctions::sanitize_text( $_GET['sorting'] ?? null );
		$filter_param  = HelperFunctions::sanitize_text( $_GET['filters'] ?? null );

		$item_per_page = HelperFunctions::sanitize_text( $_GET['items'] ?? 3 );
		$current_page  = HelperFunctions::sanitize_text( $_GET['current_page'] ?? 1 );
		$offset        = HelperFunctions::sanitize_text( $_GET['offset'] ?? 0 );
		$query         = HelperFunctions::sanitize_text( isset( $_GET['q'] ) ? $_GET['q'] : '' );

		$sorting = null;
		$filters = null;

		if ( isset( $sorting_param ) ) {
			$sorting = json_decode( stripslashes( $sorting_param ), true );
		}

		if ( isset( $filter_param ) ) {
			$filters = json_decode( stripslashes( $filter_param ), true );
		}

		$users = self::get_users(
			array(
				'inherit'       => $inherit,
				'post_parent'   => $post_parent,
				'sorting'       => $sorting,
				'filters'       => $filters,
				'item_per_page' => $item_per_page,
				'current_page'  => $current_page,
				'offset'        => $offset,
				'q'             => $query,
			)
		);

		wp_send_json( $users );
	}

	public static function get_users( $params ) {
		$inherit     = (bool) ( $params['inherit'] ?? false );
		$post_parent = (int) ( $params['post_parent'] ?? 0 );

		$sorting       = isset( $params['sorting'] ) ? $params['sorting'] : null;
		$filters       = isset( $params['filters'] ) ? $params['filters'] : null;
		$item_per_page = isset( $params['item_per_page'] ) ? $params['item_per_page'] : 3;
		$current_page  = isset( $params['current_page'] ) ? $params['current_page'] : 1;
		$offset        = isset( $params['offset'] ) ? $params['offset'] : 0;
		$query         = isset( $params['q'] ) ? $params['q'] : '';

		// Calculate the offset
		$offset_cal = ( $current_page - 1 ) * $item_per_page + $offset;

		if ( ! $query ) {
			$query = HelperFunctions::sanitize_text( isset( $_REQUEST['q'] ) ? $_REQUEST['q'] : '' );
		}

		$args = array(
			'number'         => $item_per_page,
			'paged'          => $current_page,
			'offset'         => $offset_cal,
			'search'         => '*' . $query . '*',  // The dynamic search query
			'search_columns' => array( 'user_nicename', 'user_email', 'display_name' ),  // Fields to search in
		);

		if ( isset( $filters ) && is_array( $filters ) ) {
			foreach ( $filters as $filter_item ) {
				$field_name = isset( $filter_item['id'] ) ? $filter_item['id'] : '';

				if ( ! $field_name ) {
					continue;
				}

				switch ( $field_name ) {
					case 'date_query': {
						/**
						 * $filter_item['items'] max contain one array.
						 * in array may contain start-date, end-date
						 * Like: [{"start-date": "2020-01-01","end-date": "2020-01-02"}]
						 */

						if ( isset( $filter_item['items'], $filter_item['items'][0] ) ) {
							$items = $filter_item['items'];
							$item  = $items[0]; // Get first item in array.

							$date_query              = array();
							$date_query['inclusive'] = true;

							if ( ! empty( $item['start-date'] ) ) {
									$date_query['after'] = $item['start-date'];
							}

							if ( ! empty( $item['end-date'] ) ) {
								$date_query['before'] = $item['end-date'];
							}

							$args['date_query'] = $date_query;
						}

							break;
					}

					case 'role': {
						/**
						 * $filter_item['items'] must not contain more than 2 array of conditions.
						 * 1 array may contain 'in' conditions and another for 'not-in' conditions
						 * And values of 'in' and 'not-in' conditions should not collide
						 * Like: the condition should not be author 'in' [1, 2, 3] and 'not-in' [2, 4, 5]
						 */
						$items = $filter_item['items'];

						foreach ( $items as $item ) {
							if ( isset( $item['condition'], $item['values'] ) && is_array( $item['values'] ) ) {
								if ( $item['condition'] === 'in' ) {
									$args['role__in'] = $item['values'];
								}

								if ( $item['condition'] === 'not-in' ) {
									$args['role__not_in'] = $item['values'];
								}
							}
						}

						break;
					}
				}
			}
		}

		if ( $sorting ) {
			if ( isset( $sorting['order'] ) ) {
				$args['order'] = $sorting['order'];
			}
			if ( isset( $sorting['orderby'] ) ) {
				$args['orderby'] = $sorting['orderby'];
			}
		}

		$users = get_users( $args );

		// To get total users based on filters, exclude pagination from $args
		$args_for_count = array_merge(
			$args,
			array(
				'number'      => '',
				'paged'       => '',
				'count_total' => true,
			)
		);

		// Fetch total users count
		$total_users = count( get_users( $args_for_count ) );
		$total_users = $total_users - $offset;

		// Calculate pagination
		$total_pages   = ceil( $total_users / $item_per_page );
		$previous_page = ( $current_page > 1 ) ? $current_page - 1 : null;
		$next_page     = ( $current_page < $total_pages ) ? $current_page + 1 : null;

		// Prepare pagination array
		$pagination = array(
			'per_page'     => $item_per_page,
			'current_page' => $current_page,
			'total_pages'  => $total_pages,
			'previous'     => $previous_page,
			'next'         => $next_page,
			'total_count'  => $total_users,
		);

		// Return the users and pagination info
		return array(
			'data'       => self::get_formatted_users_data( $users ),
			'pagination' => $pagination,
		);
	}

	public static function get_formatted_users_data( $users ) {
		// Initialize an empty array to store formatted user data
		$formatted_users = array();

		// Loop through each user and format the data
		foreach ( $users as $user ) {
			  // Add user data to the array
			  $formatted_users[] = self::get_format_single_user_data( $user );
		}

		return $formatted_users;
	}

	/**
	 * The function `get_format_single_user_data` retrieves and formats specific user data including ID,
	 * display name, email, profile URL, and avatar URL.
	 */
	public static function get_format_single_user_data( $user ) {
		// Get the user's avatar (profile image) URL
		$avatar_url = get_avatar_url( $user->user_email );

		// Get the user's profile page URL
		$profile_url = get_author_posts_url( $user->ID );

		return array(
			'ID'              => $user->ID,
			'display_name'    => $user->display_name,
			'user_email'      => $user->user_email,
			'user_nicename'   => $user->user_nicename,
			'user_registered' => $user->user_registered,
			'user_status'     => $user->user_status,
			'user_url'        => $profile_url,
			'profile_image'   => $avatar_url,  // Only the main profile image
			'roles'           => $user->roles,
		);
	}

	public static function get_user_by_id( $user_id ) {
		$user = get_user_by( 'id', $user_id );

		$format_user = self::get_format_single_user_data( $user );
		return $format_user;
	}
}
