<?php
declare(strict_types=1);

use PHPUnit\Framework\TestCase;

if ( ! function_exists( 'wp_strip_all_tags' ) ) {
	function wp_strip_all_tags( string $s ): string {
		return strip_tags( $s );
	}
}
if ( ! function_exists( 'delete_option' ) ) {
	function delete_option( string $key ): bool {
		unset( $GLOBALS['_wp_options'][ $key ] );
		return true;
	}
}
if ( ! function_exists( 'do_action' ) ) {
	function do_action( string $hook, ...$args ): void {
		// no-op for unit tests.
	}
}
if ( ! class_exists( 'WP_Error' ) ) {
	class WP_Error {
		public string $code;
		public string $message;
		public array $data;
		public function __construct( string $code = '', string $message = '', $data = array() ) {
			$this->code = $code;
			$this->message = $message;
			$this->data = (array) $data;
		}
		public function get_error_code(): string { return $this->code; }
		public function get_error_message(): string { return $this->message; }
		public function get_error_data() { return $this->data; }
	}
}

require_once dirname( __DIR__, 3 ) . '/includes/class-tmdo-logger.php';
require_once dirname( __DIR__, 3 ) . '/includes/diagnostic/class-tmdo-health-cron.php';

/**
 * Unit tests for WPDO_Health_Cron (v2.3.0 M6).
 *
 * Pure-logic tests — does not exercise actual cron firing or full Site Health
 * subprocess (those covered by integration suite). Asserts on output shape +
 * counter aggregation + alert flag setting.
 */
class HealthCronTest extends TestCase {

	protected function setUp(): void {
		$GLOBALS['_wp_options'] = array();
		$this->setup_wpdb_mock();
	}

	private function setup_wpdb_mock(): void {
		global $wpdb;
		$wpdb = new class {
			public string $prefix = 'wp_';
			public string $options = 'wp_options';
			// v2.5.0：Module_Detector reads $wpdb->posts during Health_Cron
			// integration; declared here to silence undefined-property warning.
			public string $posts = 'wp_posts';
			public string $postmeta = 'wp_postmeta';
			public function prepare( string $sql, ...$args ): string {
				$i = 0;
				return preg_replace_callback( '/%[sd]/', function() use ( &$i, $args ) {
					return (string) ( $args[ $i++ ] ?? '?' );
				}, $sql );
			}
			public function get_var( string $sql ) {
				$upper = strtoupper( $sql );
				// Table-existence probes → truthy so schema_drift / orphan_zone passes.
				if ( str_contains( $upper, 'SHOW TABLES' ) || str_contains( $upper, 'INFORMATION_SCHEMA' ) ) {
					return '1';
				}
				return '0';
			}
			public function get_results( string $sql, $output = ARRAY_A ): array {
				return array();
			}
			public function query( string $sql ): int { return 0; }
			public function insert( string $table, array $data ): int { return 1; }
		};
	}

	public function test_get_last_run_returns_null_when_never_run(): void {
		$this->assertNull( WPDO_Health_Cron::get_last_run() );
	}

	public function test_run_returns_summary_shape(): void {
		$result = WPDO_Health_Cron::run();
		$this->assertTrue( $result['ok'] );
		$this->assertArrayHasKey( 'summary', $result );
		$this->assertArrayHasKey( 'critical_count', $result );
		$this->assertArrayHasKey( 'recommended_count', $result );
		$this->assertArrayHasKey( 'ts', $result );
		$this->assertArrayHasKey( 'tests', $result['summary'] );
		$this->assertArrayHasKey( 'conflicts', $result['summary'] );
		$this->assertArrayHasKey( 'shadow_diffs', $result['summary'] );
		$this->assertArrayHasKey( 'autoload_bytes', $result['summary'] );
		$this->assertArrayHasKey( 'duration_ms', $result['summary'] );
	}

	public function test_run_persists_last_run_option(): void {
		WPDO_Health_Cron::run();
		$last = WPDO_Health_Cron::get_last_run();
		$this->assertIsArray( $last );
		$this->assertArrayHasKey( 'tests', $last );
		$this->assertArrayHasKey( 'critical_count', $last );
	}

	public function test_run_clears_alert_when_no_critical(): void {
		// Pre-set an alert.
		update_option( WPDO_Health_Cron::OPTION_ALERT, array( 'level' => 'critical' ), false );
		WPDO_Health_Cron::run();
		$this->assertFalse( get_option( WPDO_Health_Cron::OPTION_ALERT ), 'alert should be cleared on green run' );
	}

	public function test_consecutive_green_days_zero_when_no_run(): void {
		$this->assertSame( 0, WPDO_Health_Cron::consecutive_green_days() );
	}

	public function test_consecutive_green_days_one_after_green_run(): void {
		WPDO_Health_Cron::run();
		$this->assertSame( 1, WPDO_Health_Cron::consecutive_green_days() );
	}

	public function test_option_keys_are_documented(): void {
		$this->assertSame( 'wpdo_health_last_run', WPDO_Health_Cron::OPTION_LAST_RUN );
		$this->assertSame( 'wpdo_health_alert', WPDO_Health_Cron::OPTION_ALERT );
	}
}