<?php
declare(strict_types=1);

use PHPUnit\Framework\TestCase;

/**
 * Tests for WPDO_HivePress_Comment_Router.
 *
 * @covers WPDO_HivePress_Comment_Router
 */
class HivePressCommentRouterTest extends TestCase {

	use WpdbMockTrait;

	protected function setUp(): void {
		$this->install_wpdb_mock();
		WPDO_HivePress_Comment_Router::reset_for_tests();
		// Default disabled.
		$GLOBALS['_wp_options'][ WPDO_HivePress_Comment_Router::OPTION_ENABLED ] = 0;
	}

	public function test_disabled_by_default(): void {
		$this->assertFalse( WPDO_HivePress_Comment_Router::is_enabled() );
	}

	public function test_enabled_when_option_set(): void {
		$GLOBALS['_wp_options'][ WPDO_HivePress_Comment_Router::OPTION_ENABLED ] = 1;
		$this->assertTrue( WPDO_HivePress_Comment_Router::is_enabled() );
	}

	public function test_register_is_idempotent(): void {
		$GLOBALS['_wp_options'][ WPDO_HivePress_Comment_Router::OPTION_ENABLED ] = 1;
		WPDO_HivePress_Comment_Router::register();
		WPDO_HivePress_Comment_Router::register(); // Second call must be no-op.
		$this->assertTrue( true ); // No throw = pass
	}

	public function test_rewrite_skips_unknown_comment_type(): void {
		$query = new stdClass();
		$query->query_vars = array( 'type' => 'comment' ); // not in shadow map

		$clauses = array( 'join' => '', 'where' => '1=1' );
		$out     = WPDO_HivePress_Comment_Router::rewrite( $clauses, $query );

		$this->assertSame( $clauses, $out );
	}

	public function test_rewrite_adds_left_join_for_hp_favorite(): void {
		$query             = new stdClass();
		$query->query_vars = array( 'type' => 'hp_favorite' );

		$clauses = array( 'join' => '', 'where' => '1=1' );
		$out     = WPDO_HivePress_Comment_Router::rewrite( $clauses, $query );

		$this->assertStringContainsString( 'LEFT JOIN', $out['join'] );
		$this->assertStringContainsString( 'wpdo_comment_hp_favorite', $out['join'] );
		$this->assertStringContainsString( 'AS wpdo_shadow', $out['join'] );
	}

	public function test_rewrite_promotes_recipient_for_hp_message(): void {
		$query             = new stdClass();
		$query->query_vars = array( 'type' => 'hp_message' );

		$clauses = array(
			'join'  => '',
			'where' => 'wp_comments.comment_karma = 42 AND comment_approved = 0',
		);
		$out     = WPDO_HivePress_Comment_Router::rewrite( $clauses, $query );

		// recipient lookup should be rewritten to use shadow column.
		$this->assertStringContainsString( 'wpdo_shadow.recipient_id = 42', $out['where'] );
		// Other predicates preserved.
		$this->assertStringContainsString( 'comment_approved = 0', $out['where'] );
	}

	public function test_rewrite_handles_array_type(): void {
		$query             = new stdClass();
		$query->query_vars = array( 'type' => array( 'hp_review', 'comment' ) );

		$clauses = array( 'join' => '', 'where' => '' );
		$out     = WPDO_HivePress_Comment_Router::rewrite( $clauses, $query );

		// First element of type array should match (hp_review).
		$this->assertStringContainsString( 'wpdo_comment_hp_review', $out['join'] );
	}

	public function test_rewrite_returns_unchanged_when_query_invalid(): void {
		$clauses = array( 'join' => '', 'where' => '1=1' );
		$out     = WPDO_HivePress_Comment_Router::rewrite( $clauses, 'not an object' );
		$this->assertSame( $clauses, $out );
	}
}