<?php
/**
 * Runs when the merchant deletes the plugin from the Plugins screen.
 *
 * Removes what the plugin configured and leaves what the shop owns. Settings and
 * per-product toggles are ours and go; order data does not — the Fabrixa remote
 * id, fulfilment status and tracking details on an order are a business record of
 * something that actually shipped, and a plugin has no business destroying them.
 *
 * @package Fabrixa_Studio
 */

if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
	exit;
}

/**
 * Clear this plugin's data for the current site.
 */
function fabrixa_studio_uninstall_site() {
	$options = array(
		'fabrixa_application_key',
		// Used by the order push that shipped up to 0.3.1.
		'fabrixa_access_token',
		'fabrixa_studio_sends_cleared',
		'fabrixa_environment',
		'fabrixa_custom_studio_url',
		'fabrixa_custom_api_base',
		'fabrixa_webhook_secret',
		// Left behind by the self-updater that shipped up to 0.2.1.
		'fabrixa_studio_update_error',
	);

	foreach ( $options as $option ) {
		delete_option( $option );
	}

	// Per-product configuration, plus the per-product SKU field that shipped up
	// to 0.3.0. Both live in post meta, which is why order meta is untouched by
	// this even on the legacy order storage: order rows carry their own keys and
	// none of them are listed here.
	delete_post_meta_by_key( '_fabrixa_enabled' );
	delete_post_meta_by_key( '_fabrixa_sku' );

	// Per-user dismissal state from the update notice that shipped up to 0.2.1.
	delete_metadata( 'user', 0, 'fabrixa_studio_dismissed_update', '', true );

	// Sends still queued by versions up to 0.3.1.
	if ( function_exists( 'as_unschedule_all_actions' ) ) {
		as_unschedule_all_actions( 'fabrixa_studio_send_order' );
	}
	if ( function_exists( 'wp_unschedule_hook' ) ) {
		wp_unschedule_hook( 'fabrixa_studio_send_order' );
	}
}

/**
 * Clear this plugin's data everywhere on the installation it was configured.
 *
 * Wrapped in a function rather than run at file scope so the loop variables stay
 * out of the global namespace, which an uninstall file shares with WordPress.
 */
function fabrixa_studio_uninstall() {
	if ( ! is_multisite() ) {
		fabrixa_studio_uninstall_site();
		return;
	}

	// get_sites() returns at most 100 rows by default, so page rather than assume.
	$batch_size = 100;
	$offset     = 0;

	do {
		$site_ids = get_sites(
			array(
				'fields' => 'ids',
				'number' => $batch_size,
				'offset' => $offset,
			)
		);

		foreach ( $site_ids as $site_id ) {
			switch_to_blog( $site_id );
			fabrixa_studio_uninstall_site();
			restore_current_blog();
		}

		$offset += $batch_size;
	} while ( count( $site_ids ) === $batch_size );
}

fabrixa_studio_uninstall();