<?php

namespace GravityKit\GravityExport;

use GFExcel\Container\ContainerInterface;
use GravityKit\GravityExport\Addon\GravityExportAddon;
use GravityKit\GravityExport\Filters\Addon\FiltersFeedAddon;
use GravityKit\GravityExport\Filters\ServiceProvider\FiltersProvider;
use GravityKit\GravityExport\PdfRenderer\ServiceProvider\PdfProvider;
use GFExcel\Plugin\BasePlugin;
use GravityKit\GravityExport\Save\Addon\SaveAddon;
use GravityKit\GravityExport\Save\ServiceProvider\ServiceProvider;
use GravityKit\GravityExport\ServiceProvider\GravityExportProvider;

/**
 * The main plugin file.
 *
 * @since 1.0
 */
class GravityExport extends BasePlugin {
	/**
	 * @since 1.0
	 * @var string Assets handle.
	 */
	public const ASSETS_HANDLE = 'gk-gravityexport';
	/**
	 * @inheritdoc
	 *
	 * @since 1.0
	 */
	protected $addons = [
		GravityExportAddon::class,
		FiltersFeedAddon::class,
		SaveAddon::class,
	];

    /**
     * The single instance of the class.
     *
     * @since 1.5.0
     *
     * @var self
     */
    private static $instance;

	/**
	 * @inheritdoc
	 *
	 * @since 1.0
	 */
	public function __construct( ContainerInterface $container, string $assets_dir = null ) {
		parent::__construct( $container, $assets_dir );

		add_filter( 'gform_noconflict_scripts', [ $this, 'register_no_conflicts' ] );
		add_filter( 'gform_noconflict_styles', [ $this, 'register_no_conflicts' ] );
		add_action( 'admin_enqueue_scripts', [ $this, 'register_ui_assets' ] );
	}

    /**
     * Returns the single instance of the class.
     *
     * @since 1.5.0
     *
     * @param ContainerInterface $container  The container.
     * @param null|string $assets_dir The assets directory.
     *
     * @return self
     */
    public static function get_instance( ContainerInterface $container, ?string $assets_dir = null ):self
    {
        if ( ! self::$instance instanceof self ) {
            self::$instance = new self( $container, $assets_dir );
        }

        return self::$instance;
    }

	/**
	 * Registers available service providers.
	 *
	 * @since 1.0
	 */
	public function registerServiceProviders(): self {
		$this->container->addServiceProvider( new GravityExportProvider() );
		$this->container->addServiceProvider( new FiltersProvider() );
		$this->container->addServiceProvider( new PdfProvider() );
		$this->container->addServiceProvider( new ServiceProvider() );

		return $this;
	}

	/**
	 * Enqueues UI scripts/styles.
	 *
	 * @since 1.0
	 * @since 1.1 Added $page parameter.
	 *
	 * @param string $page Requested page ID.
	 *
	 * @return void
	 */
	public function register_ui_assets( $page ): void {
		if ( ! self::is_gravityexport_page() ) {
			return;
		}

		wp_enqueue_script( self::ASSETS_HANDLE, plugin_dir_url( GK_GRAVITYEXPORT_PLUGIN_FILE ) . 'assets/js/gravityexport.js', [], GK_GRAVITYEXPORT_PLUGIN_VERSION );
		wp_enqueue_style( self::ASSETS_HANDLE, plugin_dir_url( GK_GRAVITYEXPORT_PLUGIN_FILE ) . 'assets/css/gravityexport.css', [], GK_GRAVITYEXPORT_PLUGIN_VERSION );
	}

	/**
	 * Adds UI assets to GF's no-conflict list.
	 *
	 * @since 1.0
	 *
	 * @param array $registered
	 *
	 * @return array $registered
	 *
	 */
	public function register_no_conflicts( array $registered ): array {
		$registered[] = self::ASSETS_HANDLE;

		return $registered;
	}

	/**
	 * Detects if the current page is a GravityExport page.
	 *
	 * @return bool
	 */
	public static function is_gravityexport_page(): bool {
		$form_or_feed_settings_page = in_array( rgget( 'page' ), [ 'gf_settings', 'gf_edit_forms' ] );
		$gravityexport_subview      = strpos( rgget( 'subview' ), 'gravityexport' ) !== false;

		return $form_or_feed_settings_page && $gravityexport_subview;
	}
}