<?php
declare(strict_types=1);

use PHPUnit\Framework\TestCase;

/**
 * Unit tests for WPDO_Member_Fields entity group registration.
 *
 * Verifies that register_entity_fields() correctly registers all four
 * user groups with the expected field counts, types, and attributes.
 */
class MemberFieldsRegistrationTest extends TestCase {

	protected function setUp(): void {
		// Load the class under test if not already loaded.
		if ( ! class_exists( 'WPDO_Member_Fields' ) ) {
			require_once WPDO_PLUGIN_DIR . 'includes/integrations/class-tmdo-member-fields.php';
		}
		if ( ! class_exists( 'WPDO_Adapter_User' ) ) {
			require_once WPDO_PLUGIN_DIR . 'includes/adapters/class-tmdo-adapter-user.php';
		}

		// Reset Entity Registry and register the user adapter.
		WPDO_Entity_Registry::init();
		WPDO_Entity_Registry::register_adapter( 'user', new WPDO_Adapter_User() );
	}

	// ── Group presence ───────────────────────────────────────────────────────

	public function test_register_entity_fields_returns_early_without_entity_registry(): void {
		// Class_exists('WPDO_Entity_Registry') will be true here, so we just
		// confirm calling the method twice (dedup guard) returns false the 2nd time.
		WPDO_Member_Fields::register_entity_fields();
		// Second call: groups already registered — register_group() returns false (dedup).
		// No assertion needed: simply must not throw.
		$this->assertTrue( true );
	}

	public function test_all_four_groups_are_registered(): void {
		WPDO_Member_Fields::register_entity_fields();

		foreach ( array( 'membership', 'activity', 'profile', 'sso' ) as $group ) {
			$fields = WPDO_Entity_Registry::get_group_fields( 'user', $group );
			$this->assertNotEmpty( $fields, "Group '{$group}' should have registered fields." );
		}
	}

	// ── membership group ─────────────────────────────────────────────────────

	public function test_membership_group_has_six_fields(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'membership' );
		$this->assertCount( 6, $fields );
	}

	public function test_membership_level_is_enum_with_five_options(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'membership' );
		$level  = $this->find_field( $fields, 'membership_level' );

		$this->assertNotNull( $level );
		$this->assertSame( 'enum', $level['type'] );
		$this->assertCount( 5, $level['options'] );
		$this->assertContains( 'gold', $level['options'] );
		$this->assertContains( 'platinum', $level['options'] );
	}

	public function test_membership_level_is_searchable(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'membership' );
		$level  = $this->find_field( $fields, 'membership_level' );

		$this->assertTrue( (bool) $level['searchable'] );
	}

	public function test_points_balance_is_integer_searchable(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'membership' );
		$field  = $this->find_field( $fields, 'points_balance' );

		$this->assertSame( 'integer', $field['type'] );
		$this->assertTrue( (bool) $field['searchable'] );
		$this->assertSame( 0, $field['default'] );
	}

	public function test_membership_expires_at_is_datetime_searchable(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'membership' );
		$field  = $this->find_field( $fields, 'membership_expires_at' );

		$this->assertSame( 'datetime', $field['type'] );
		$this->assertTrue( (bool) $field['searchable'] );
	}

	// ── activity group ───────────────────────────────────────────────────────

	public function test_activity_group_has_six_fields(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'activity' );
		$this->assertCount( 6, $fields );
	}

	public function test_login_count_has_integer_type_and_zero_default(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'activity' );
		$field  = $this->find_field( $fields, 'login_count' );

		$this->assertSame( 'integer', $field['type'] );
		$this->assertSame( 0, $field['default'] );
	}

	public function test_account_flags_is_integer(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'activity' );
		$field  = $this->find_field( $fields, 'account_flags' );

		$this->assertSame( 'integer', $field['type'] );
	}

	// ── profile group ────────────────────────────────────────────────────────

	public function test_profile_group_has_five_fields(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'profile' );
		$this->assertCount( 5, $fields );
	}

	public function test_specialties_is_json_type(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'profile' );
		$field  = $this->find_field( $fields, 'specialties' );

		$this->assertSame( 'json', $field['type'] );
	}

	public function test_display_name_custom_is_fulltext_searchable(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'profile' );
		$field  = $this->find_field( $fields, 'display_name_custom' );

		$this->assertTrue( (bool) $field['searchable'] );
		$this->assertTrue( (bool) $field['fulltext'] );
	}

	// ── sso group ────────────────────────────────────────────────────────────

	public function test_sso_group_has_eight_fields(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'sso' );
		// v3.4.4: known_login_ips registered (was leaking to wp_usermeta via set_entity).
		$this->assertCount( 8, $fields );
		$this->assertNotNull( $this->find_field( $fields, 'known_login_ips' ) );
	}

	public function test_hub_global_user_id_is_searchable(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'sso' );
		$field  = $this->find_field( $fields, 'hub_global_user_id' );

		$this->assertTrue( (bool) $field['searchable'] );
	}

	public function test_token_expires_at_is_datetime_searchable(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'sso' );
		$field  = $this->find_field( $fields, 'token_expires_at' );

		$this->assertSame( 'datetime', $field['type'] );
		$this->assertTrue( (bool) $field['searchable'] );
	}

	public function test_refresh_token_enc_is_textarea(): void {
		WPDO_Member_Fields::register_entity_fields();
		$fields = WPDO_Entity_Registry::get_group_fields( 'user', 'sso' );
		$field  = $this->find_field( $fields, 'refresh_token_enc' );

		$this->assertSame( 'textarea', $field['type'] );
	}

	// ── register() hooks add_action ──────────────────────────────────────────

	public function test_register_hooks_wpdo_register_entity_fields(): void {
		// add_action is a no-op stub in test bootstrap; just confirm no exception.
		$this->assertNull( WPDO_Member_Fields::register() );
	}

	// ── helper ───────────────────────────────────────────────────────────────

	/**
	 * Find a field definition by key within a fields array.
	 *
	 * @param array  $fields Array of field definitions.
	 * @param string $key    Meta key to find.
	 * @return array|null
	 */
	private function find_field( array $fields, string $key ): ?array {
		foreach ( $fields as $field ) {
			if ( $field['key'] === $key ) {
				return $field;
			}
		}
		return null;
	}
}