<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit\Integrations\Divi\Release;

use Brain\Monkey\Functions;
use LIT\MCP\Integrations\Divi\Release\CheckReport;
use LIT\MCP\Integrations\Divi\Release\CheckReportStore;
use LIT\MCP\Integrations\Divi\Release\CompatibilityCheck;
use LIT\MCP\Integrations\Divi\Release\DiviCheckRoute;
use LIT\MCP\Tests\Unit\TestCase;
use Mockery;
use RuntimeException;

final class DiviCheckRouteTest extends TestCase
{
    protected function setUp(): void
    {
        parent::setUp();
        Functions\when('admin_url')->alias(static fn (string $path = ''): string => 'https://k.de/wp-admin/' . $path);
        Functions\when('add_query_arg')->alias(
            static fn (array $args, string $url): string => $url . '?' . http_build_query($args)
        );
        Functions\when('get_current_user_id')->justReturn(1);
    }

    protected function tearDown(): void
    {
        unset($GLOBALS['wpdb']);
        parent::tearDown();
    }

    /** Mock of the global $wpdb, its INSERT IGNORE returning $inserted rows affected. */
    private static function wpdb(int $inserted): \wpdb
    {
        $db = Mockery::mock(\wpdb::class)->makePartial();
        $db->expects('query')->once()->with(Mockery::on(static function (string $sql): bool {
            return str_starts_with(
                $sql,
                "INSERT IGNORE INTO wp_options (option_name, option_value, autoload) "
                    . "VALUES ('lit_mcp_divi_check_lock', '"
            ) && str_ends_with($sql, "', 'no')");
        }))->andReturn($inserted);
        $GLOBALS['wpdb'] = $db;

        return $db;
    }

    public function testRegistersAPostRouteForAdministratorsOnly(): void
    {
        Functions\expect('register_rest_route')->once()->with(
            'lit-mcp/v1',
            '/divi-check',
            Mockery::on(static function (array $args): bool {
                Functions\when('current_user_can')->alias(static fn (string $cap): bool => $cap === 'manage_options');
                $allowed = ($args['permission_callback'])();
                Functions\when('current_user_can')->justReturn(false);

                return $args['methods'] === 'POST' && $allowed === true && ($args['permission_callback'])() === false;
            })
        );

        (new DiviCheckRoute(static fn () => null))->registerRoute();
    }

    public function testRunsTheCheckStoresTheReportAndRedirectsToTheTab(): void
    {
        self::wpdb(1);
        $report = new CheckReport('r1', 'd', 1, '5.3.0', '0.6.0', 'k', []);
        $check = Mockery::mock(CompatibilityCheck::class);
        $check->expects('run')->with(1)->andReturn($report);
        $reports = Mockery::mock(CheckReportStore::class);
        $reports->expects('save')->with($report);
        Functions\expect('delete_option')->once()->with(DiviCheckRoute::LOCK);

        $response = (new DiviCheckRoute(static fn () => $check, $reports))->handle();

        self::assertSame(303, $response->get_status());
        self::assertStringContainsString('tab=divi', $response->get_headers()['Location']);
        self::assertStringContainsString('lit_mcp_notice=divi_checked', $response->get_headers()['Location']);
    }

    public function testASecondCheckWaitsForTheFirst(): void
    {
        $db = self::wpdb(0);
        $db->expects('get_var')->once()->andReturn((string) time());
        Functions\expect('delete_option')->never();
        $reports = Mockery::mock(CheckReportStore::class);
        $reports->expects('save')->never();

        $response = (new DiviCheckRoute(static fn () => self::fail('no second check'), $reports))->handle();

        self::assertStringContainsString('lit_mcp_notice=divi_check_running', $response->get_headers()['Location']);
    }

    public function testAStaleLockIsTakenOver(): void
    {
        $db = self::wpdb(0);
        $db->expects('get_var')->once()->andReturn('1');
        $db->expects('query')->once()->with(Mockery::on(static function (string $sql): bool {
            return str_starts_with($sql, "UPDATE wp_options SET option_value = '")
                && str_ends_with(
                    $sql,
                    "' WHERE option_name = 'lit_mcp_divi_check_lock' AND option_value = '1'"
                );
        }))->andReturn(1);
        Functions\expect('delete_option')->once()->with(DiviCheckRoute::LOCK);
        $check = Mockery::mock(CompatibilityCheck::class);
        $check->expects('run')->andReturn(new CheckReport('r1', 'd', 1, '5.3.0', '0.6.0', 'k', []));
        $reports = Mockery::mock(CheckReportStore::class);
        $reports->expects('save');

        $response = (new DiviCheckRoute(static fn () => $check, $reports))->handle();

        self::assertStringContainsString('lit_mcp_notice=divi_checked', $response->get_headers()['Location']);
    }

    public function testATakeoverLostToAnotherRequestWaitsForIt(): void
    {
        $db = self::wpdb(0);
        $db->expects('get_var')->once()->andReturn('1');
        $db->expects('query')->once()->with(Mockery::on(static fn (string $sql): bool => str_starts_with(
            $sql,
            "UPDATE wp_options SET option_value = '"
        )))->andReturn(0);
        Functions\expect('delete_option')->never();
        $reports = Mockery::mock(CheckReportStore::class);
        $reports->expects('save')->never();

        $response = (new DiviCheckRoute(static fn () => self::fail('no second check'), $reports))->handle();

        self::assertStringContainsString('lit_mcp_notice=divi_check_running', $response->get_headers()['Location']);
    }

    public function testTheLockIsReleasedAndTheCheckMarkedFailedWhenItThrows(): void
    {
        self::wpdb(1);
        Functions\expect('delete_option')->once()->with(DiviCheckRoute::LOCK);
        $check = Mockery::mock(CompatibilityCheck::class);
        $check->expects('run')->andThrow(new RuntimeException('divi kaputt'));
        $reports = Mockery::mock(CheckReportStore::class);
        $reports->expects('save')->never();
        // error_log() is a PHP internal and cannot be stubbed; redirect it to a temp file instead.
        $log = (string) tempnam(sys_get_temp_dir(), 'lit-mcp-log');
        $previous = ini_set('error_log', $log);

        try {
            $response = (new DiviCheckRoute(static fn () => $check, $reports))->handle();
        } finally {
            ini_set('error_log', (string) $previous);
        }

        self::assertStringContainsString('lit_mcp_notice=divi_check_failed', $response->get_headers()['Location']);
        self::assertStringContainsString(
            'divi check failed: RuntimeException: divi kaputt',
            (string) file_get_contents($log)
        );
        unlink($log);
    }
}