<?php

namespace WPContentSync\Tests\Unit\Package;

use PHPUnit\Framework\TestCase;
use WPContentSync\Package\PackageChecksum;
use WPContentSync\Package\PackageValidator;

class PackageValidatorTest extends TestCase {
	public function test_it_accepts_valid_packages(): void {
		$result = ( new PackageValidator() )->validate( $this->validPackage() );

		self::assertTrue( $result->isValid() );
		self::assertSame( array(), $result->errors() );
	}

	public function test_it_rejects_missing_required_fields(): void {
		$package = $this->validPackage();
		unset( $package['records'] );

		$result = ( new PackageValidator() )->validate( $package );

		self::assertFalse( $result->isValid() );
		self::assertSame( array( 'records is required.' ), $result->errors() );
	}

	public function test_it_rejects_unsupported_schema_versions(): void {
		$package                   = $this->validPackage();
		$package['schema_version'] = '2.0';

		$result = ( new PackageValidator() )->validate( $package );

		self::assertFalse( $result->isValid() );
		self::assertSame( array( 'schema_version must be 1.0.' ), $result->errors() );
	}

	public function test_it_rejects_missing_record_buckets(): void {
		$package = $this->validPackage();
		unset( $package['records']['media'] );

		$result = ( new PackageValidator() )->validate( $package );

		self::assertFalse( $result->isValid() );
		self::assertSame( array( 'records.media is required and must be an array.' ), $result->errors() );
	}

	public function test_it_rejects_manifest_counts_that_do_not_match_records(): void {
		$package                      = $this->validPackage();
		$package['manifest']['posts'] = 2;

		$result = ( new PackageValidator() )->validate( $package );

		self::assertFalse( $result->isValid() );
		self::assertSame( array( 'manifest.posts must match records.posts count.' ), $result->errors() );
	}

	public function test_it_rejects_invalid_record_checksums(): void {
		$package                         = $this->validPackage();
		$package['checksums']['records'] = 'sha256:wrong';

		$result = ( new PackageValidator() )->validate( $package );

		self::assertFalse( $result->isValid() );
		self::assertSame( array( 'checksums.records does not match records payload.' ), $result->errors() );
	}

	/**
	 * @return array<string, mixed>
	 */
	private function validPackage(): array {
		return array(
			'schema_version' => '1.0',
			'generated_at'   => '2026-04-26T20:30:00+00:00',
			'source'         => array(
				'site_url' => 'https://example.test',
				'name'     => 'Example Production',
			),
			'destination'    => array(
				'site_url' => 'https://staging.example.test',
				'name'     => 'Example Staging',
			),
			'manifest'       => array(
				'posts'             => 1,
				'terms'             => 0,
				'media'             => 0,
				'custom_post_types' => 0,
			),
			'records'        => array(
				'posts'             => array(
					array(
						'id'   => 123,
						'type' => 'post',
					),
				),
				'terms'             => array(),
				'media'             => array(),
				'custom_post_types' => array(),
			),
			'checksums'      => array(
				'records' => PackageChecksum::records(
					array(
						'posts'             => array(
							array(
								'id'   => 123,
								'type' => 'post',
							),
						),
						'terms'             => array(),
						'media'             => array(),
						'custom_post_types' => array(),
					)
				),
			),
		);
	}
}