<?php
declare(strict_types=1);

use PHPUnit\Framework\TestCase;

/**
 * `wp tmdo member-backfill` takes its groups from the registry (2.2 PR-068).
 *
 * Before: a hard-coded VALID_GROUPS list (with the never-registered `sso`)
 * rejected groups registered by add-ons, and there was no way to backfill
 * every user group at once — R-2.1 had to fall back to `wp eval`.
 *
 * Fixture (user entity): groups cb_one (cb_a) and cb_two (cb_b).
 */
class CliMemberBackfillTest extends TestCase {

	private const ONE    = 'wp_itest_wpdo_user_cb_one';
	private const TWO    = 'wp_itest_wpdo_user_cb_two';
	private const STATUS = 'wp_itest_wpdo_migration_status';

	public static function setUpBeforeClass(): void {
		foreach ( array(
			'includes/adapters/interface-entity-adapter.php',
			'includes/adapters/class-tmdo-adapter-user.php',
			'cli/class-tmdo-cli-member.php',
		) as $file ) {
			require_once WPDO_PLUGIN_DIR . $file;
		}
	}

	protected function setUp(): void {
		global $wpdb;
		self::drop();
		$wpdb->query( "CREATE TABLE `{$wpdb->usermeta}` ( umeta_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, user_id BIGINT UNSIGNED NOT NULL DEFAULT 0, meta_key VARCHAR(255) DEFAULT NULL, meta_value LONGTEXT, PRIMARY KEY (umeta_id), KEY user_id (user_id) ) ENGINE=InnoDB" );
		$wpdb->query( 'CREATE TABLE `' . self::ONE . '` ( id BIGINT NOT NULL AUTO_INCREMENT, user_id BIGINT NOT NULL, cb_a VARCHAR(255) DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY uk_entity (user_id) ) ENGINE=InnoDB' );
		$wpdb->query( 'CREATE TABLE `' . self::TWO . '` ( id BIGINT NOT NULL AUTO_INCREMENT, user_id BIGINT NOT NULL, cb_b VARCHAR(255) DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY uk_entity (user_id) ) ENGINE=InnoDB' );
		$wpdb->query( 'CREATE TABLE `' . self::STATUS . "` ( id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, entity_type VARCHAR(50) NOT NULL, group_name VARCHAR(50) NOT NULL, last_id BIGINT UNSIGNED NOT NULL DEFAULT 0, total_migrated BIGINT UNSIGNED NOT NULL DEFAULT 0, status VARCHAR(20) NOT NULL DEFAULT 'pending', started_at DATETIME DEFAULT NULL, completed_at DATETIME DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY entity_group (entity_type, group_name) ) ENGINE=InnoDB" );
		$wpdb->insert( $wpdb->usermeta, array( 'user_id' => 1, 'meta_key' => 'cb_a', 'meta_value' => 'one' ) );
		$wpdb->insert( $wpdb->usermeta, array( 'user_id' => 1, 'meta_key' => 'cb_b', 'meta_value' => 'two' ) );

		$GLOBALS['_wp_cache'] = array();
		WPDO_Entity_Registry::init();
		WPDO_Entity_Registry::register_adapter( 'user', new WPDO_Adapter_User() );
		WPDO_Entity_Registry::register_group( 'user', 'cb_one', array( array( 'key' => 'cb_a', 'type' => 'text' ) ) );
		WPDO_Entity_Registry::register_group( 'user', 'cb_two', array( array( 'key' => 'cb_b', 'type' => 'text' ) ) );
		WPDO_Schema_Manager::flush_table_exists_cache();
	}

	protected function tearDown(): void {
		self::drop();
		WPDO_Entity_Registry::init();
	}

	private static function drop(): void {
		global $wpdb;
		foreach ( array( $wpdb->usermeta, self::ONE, self::TWO, self::STATUS ) as $table ) {
			$wpdb->query( "DROP TABLE IF EXISTS `{$table}`" );
		}
	}

	private function flat( string $table, string $col ): ?string {
		global $wpdb;
		return $wpdb->get_var( "SELECT `{$col}` FROM `{$table}` WHERE user_id = 1" );
	}

	public function test_all_backfills_every_registered_user_group(): void {
		( new TMDO_CLI_Member() )->member_backfill( array(), array( 'all' => true ) );

		$this->assertSame( 'one', $this->flat( self::ONE, 'cb_a' ) );
		$this->assertSame( 'two', $this->flat( self::TWO, 'cb_b' ) );
	}

	public function test_group_accepts_any_registered_user_group(): void {
		( new TMDO_CLI_Member() )->member_backfill( array(), array( 'group' => 'cb_two' ) );

		$this->assertSame( 'two', $this->flat( self::TWO, 'cb_b' ) );
		$this->assertNull( $this->flat( self::ONE, 'cb_a' ), 'only the requested group' );
	}

	public function test_backfillable_groups_leave_out_restored_orphans(): void {
		WPDO_Entity_Registry::restore_group( 'user', 'cb_orphan', array( array( 'key' => 'cb_orphan_key', 'type' => 'text' ) ) );

		$this->assertSame( array( 'cb_one', 'cb_two' ), TMDO_Entity_Migration_Engine::backfillable_groups( 'user' ) );
	}
}