<?php
/**
 * The Sharing buttons section of Settings > Sharing.
 *
 * @package automattic/jetpack-sharing-likes
 */

declare( strict_types = 1 );

namespace Automattic\Jetpack\Sharing_Likes\Settings;

/**
 * Renders the Sharing buttons section.
 */
final class Sharing_Section {

	/**
	 * Nonce action for this section's action buttons.
	 */
	public const NONCE_ACTION = 'jetpack-sharing-options';

	/**
	 * Render the section.
	 */
	public static function render(): void {
		$state = self::state();

		echo '<div class="jetpack-sharing-settings__section">';
		printf( '<h2>%s</h2>', esc_html_x( 'Sharing buttons', 'Settings header', 'jetpack-sharing-likes' ) );

		switch ( $state ) {
			case Section_State::BLOCK_CALL_TO_ACTION:
				self::render_block_call_to_action();
				break;
			case Section_State::OFF:
				self::render_off();
				break;
			case Section_State::CONFIGURE_WITH_BLOCK_NUDGE:
				self::render_block_nudge();
				self::render_services_config();
				break;
			default:
				self::render_services_config();
		}

		echo '</div>';
	}

	/**
	 * Which variant the section renders.
	 *
	 * @return string One of the `Section_State` constants.
	 */
	public static function state(): string {
		return Section_State::for_section(
			self::can_offer_block(),
			Environment::sharing_module_running(),
			Environment::legacy_sharing_switched_off()
		);
	}

	/**
	 * Whether the Sharing Buttons block is a route we can send this site down.
	 */
	private static function can_offer_block(): bool {
		return Environment::is_block_theme()
			&& Environment::sharing_block_registered()
			&& '' !== Environment::single_template_editor_url();
	}

	/**
	 * The legacy buttons are off and the site could use the block instead.
	 */
	private static function render_block_call_to_action(): void {
		printf(
			'<p>%s</p>',
			esc_html__( 'Add the Sharing Buttons block to your theme’s template.', 'jetpack-sharing-likes' )
		);
		self::render_site_editor_link();
	}

	/**
	 * The module is off on a theme with no block route.
	 *
	 * Nothing else on this site produces sharing buttons, so this is the one
	 * place the feature can be switched back on.
	 */
	private static function render_off(): void {
		printf(
			'<p>%s</p>',
			esc_html__( 'Sharing buttons are turned off for this site.', 'jetpack-sharing-likes' )
		);

		self::render_activate_form();
	}

	/**
	 * The way back. See `Post_Handler::activate_module()`.
	 */
	private static function render_activate_form(): void {
		if ( ! Environment::legacy_sharing_supported() ) {
			printf(
				'<p>%s</p>',
				esc_html__( 'Connect your site to WordPress.com, or enable offline mode, to turn them back on.', 'jetpack-sharing-likes' )
			);
			return;
		}

		Post_Handler::render_action_form(
			'activate-sharing',
			self::NONCE_ACTION,
			__( 'Turn on sharing buttons', 'jetpack-sharing-likes' )
		);
	}

	/**
	 * The buttons are live, but the site would be better served by the block.
	 */
	private static function render_block_nudge(): void {
		echo '<div class="notice notice-info inline">';
		printf( '<p>%s</p>', esc_html__( 'Legacy sharing buttons cannot be customized on block themes. Use the Sharing Buttons block in your theme’s template instead.', 'jetpack-sharing-likes' ) );
		Post_Handler::render_action_form(
			'switch-to-block-sharing',
			self::NONCE_ACTION,
			__( 'Switch to the Sharing Buttons block', 'jetpack-sharing-likes' ),
			false
		);
		echo '</div>';
	}

	/**
	 * Link to the active theme's single post template, with the editor open.
	 */
	private static function render_site_editor_link(): void {
		printf(
			'<p><a class="button" href="%1$s">%2$s</a></p>',
			esc_url( Environment::single_template_editor_url() ),
			esc_html__( 'Open Site Editor', 'jetpack-sharing-likes' )
		);
	}

	/**
	 * The services list and its settings.
	 */
	private static function render_services_config(): void {
		// Placement is moot with no services: the buttons appear nowhere.
		if ( ! Environment::legacy_sharing_switched_off() ) {
			Placement_Section::render_summary( Placement_Section::FEATURE_SHARING );
		}

		( new Services_Config() )->render();
	}
}