<?php
// phpcs:disable PEAR.Commenting.FileComment,PEAR.Commenting.ClassComment

/**
 * Shared integration test support.
 */
// phpcs:disable PEAR.NamingConventions.ValidFunctionName.PrivateNoUnderscore
// phpcs:disable PEAR.NamingConventions.ValidVariableName.PrivateNoUnderscore

declare(strict_types=1);

namespace Tests\Support;

use IronKanban\Support\HttpHalt;
use IronKanban\Support\FrontMatter;
use PHPUnit\Framework\TestCase;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;

/**
 * Provides an isolated markdown project workspace for integration tests.
 */
abstract class IntegrationTestCase extends TestCase
{
    /**
     * Temporary application root for the current test.
     *
     * @var string
     */
    protected string $tempRoot;

    /**
     * Temporary project storage root for the current test.
     *
     * @var string
     */
    protected string $projectRoot;

    /**
     * Saved application config to restore after the test.
     *
     * @var array<string, mixed>
     */
    private array $_originalAppConfig;

    /**
     * Repository root used to resolve actual application scripts.
     *
     * @var string
     */
    private string $_repoRoot;

    /**
     * Prepare an isolated workspace for each test.
     *
     * @return void
     */
    protected function setUp(): void
    {
        parent::setUp();

        global $appConfig;

        $this->_originalAppConfig = is_array($appConfig) ? $appConfig : [];
        $this->_repoRoot = (string) ($this->_originalAppConfig['base_path'] ?? dirname(__DIR__, 2));
        $this->tempRoot = sys_get_temp_dir() . DIRECTORY_SEPARATOR . 'ikb-tests-' . bin2hex(random_bytes(6));
        $this->projectRoot = $this->tempRoot . DIRECTORY_SEPARATOR . 'storage' . DIRECTORY_SEPARATOR . 'projects';

        mkdir($this->projectRoot, 0777, true);

        $appConfig['base_path'] = $this->tempRoot;
        $appConfig['project_root'] = $this->projectRoot;
    }

    /**
     * Restore the original workspace after the test.
     *
     * @return void
     */
    protected function tearDown(): void
    {
        global $appConfig;

        $appConfig = $this->_originalAppConfig;
        $this->_removeDirectory($this->tempRoot);

        parent::tearDown();
    }

    /**
     * Create a markdown-backed project for tests.
     *
     * @param string $projectId Project identifier.
     * @param string $title     Project title.
     * @param string $body      Project body content.
     *
     * @return string
     */
    protected function createProject(string $projectId = 'demo-project', string $title = 'Demo Project', string $body = 'Project body'): string
    {
        $projectPath = $this->projectRoot . DIRECTORY_SEPARATOR . $projectId;
        mkdir($projectPath, 0777, true);

        file_put_contents(
            $projectPath . DIRECTORY_SEPARATOR . 'index.md',
            FrontMatter::dump(
                [
                    'type' => 'project',
                    'id' => $projectId,
                    'title' => $title,
                ],
                $body
            )
        );

        return $projectId;
    }

    /**
     * Invoke an API endpoint script with request globals.
     *
     * @param string                $script Relative script path from repo root.
     * @param string                $method Request method.
     * @param array<string, mixed>  $get    Query parameters.
     * @param array<string, mixed>  $post   Form payload.
     * @param array<string, string> $server Additional server variables.
     *
     * @return array{status:int, payload:array<string, mixed>, raw:string}
     */
    protected function callApi(
        string $script,
        string $method = 'GET',
        array $get = [],
        array $post = [],
        array $server = []
    ): array {
        $_GET = $get;
        $_POST = $post;
        $_SERVER = array_merge(
            [
                'REQUEST_METHOD' => strtoupper($method),
            ],
            $server
        );

        http_response_code(200);

        if (function_exists('header_remove')) {
            header_remove();
        }

        ob_start();

        try {
            include $this->_repoRoot . DIRECTORY_SEPARATOR . str_replace('/', DIRECTORY_SEPARATOR, $script);
        } catch (HttpHalt $halt) {
        }

        $raw = (string) ob_get_clean();
        $decoded = json_decode($raw, true);

        self::assertIsArray($decoded, 'Expected a JSON object response from ' . $script . '.');

        return [
            'status' => http_response_code(),
            'payload' => $decoded,
            'raw' => $raw,
        ];
    }

    /**
     * Recursively remove a directory tree.
     *
     * @param string $path Directory path.
     *
     * @return void
     */
    private function _removeDirectory(string $path): void
    {
        if ($path === '' || !is_dir($path)) {
            return;
        }

        $iterator = new RecursiveIteratorIterator(
            new RecursiveDirectoryIterator($path, RecursiveDirectoryIterator::SKIP_DOTS),
            RecursiveIteratorIterator::CHILD_FIRST
        );

        foreach ($iterator as $item) {
            if ($item->isDir()) {
                rmdir($item->getPathname());
                continue;
            }

            unlink($item->getPathname());
        }

        rmdir($path);
    }
}