<?php

namespace AC;

use AC\Admin\RequestHandlerInterface;
use WP_Screen;

class Screen implements Registrable {

	/**
	 * @var WP_Screen
	 */
	protected $screen;

	public function register() {
		add_action( 'current_screen', [ $this, 'init' ] );
	}

	/**
	 * @param WP_Screen $screen
	 */
	public function init( WP_Screen $screen ) {
		$this->set_screen( $screen );

		do_action( 'ac/screen', $this, $this->screen->id );
	}

	/**
	 * @param $id
	 *
	 * @return bool
	 */
	public function is_screen( $id ) {
		return $this->has_screen() && $this->get_screen()->id === $id;
	}

	/**
	 * @param WP_Screen $screen
	 *
	 * @return $this
	 */
	public function set_screen( WP_Screen $screen ) {
		$this->screen = $screen;

		return $this;
	}

	/**
	 * @return WP_Screen
	 */
	public function get_screen() {
		return $this->screen;
	}

	/**
	 * @return bool
	 */
	public function has_screen() {
		return $this->screen instanceof WP_Screen;
	}

	/**
	 * @return string
	 */
	public function get_id() {
		return $this->screen->id;
	}

	/**
	 * @return string
	 */
	public function get_base() {
		return $this->screen->base;
	}

	/**
	 * @return string
	 */
	public function get_post_type() {
		return $this->screen->post_type;
	}

	/**
	 * @return string|null
	 */
	public function get_list_screen() {
		foreach ( ListScreenTypes::instance()->get_list_screens() as $list_screen ) {
			if ( $list_screen->is_current_screen( $this->screen ) ) {
				return $list_screen->get_key();
			}
		}

		return null;
	}

	/**
	 * @return bool
	 */
	private function is_admin_network() {
		return $this->screen->in_admin( 'network' );
	}

	/**
	 * @return bool
	 */
	public function is_list_screen() {
		return null !== $this->get_list_screen();
	}

	/**
	 * Check if current screen is plugins screen
	 * @return bool
	 */
	public function is_plugin_screen() {
		$id = 'plugins';

		if ( $this->is_admin_network() ) {
			$id .= '-network';
		}

		return $this->is_screen( $id );
	}

	/**
	 * @param string|null $slug
	 *
	 * @return bool
	 */
	public function is_admin_screen( $slug = null ) {
		if ( null !== $slug ) {
			return $this->is_main_admin_screen() && $slug === filter_input( INPUT_GET, RequestHandlerInterface::PARAM_TAB );
		}

		return $this->is_main_admin_screen();
	}

	/**
	 * @return bool
	 */
	private function is_main_admin_screen() {
		$id = 'settings_page_' . Admin\Admin::NAME;

		if ( $this->is_admin_network() ) {
			$id .= '-network';
		}

		return $this->is_screen( $id );
	}

}