<?php
declare(strict_types=1);
namespace App\Tests;

use App\Http\{Request, Router, Response};
use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\TestCase;

/**
 * The app may be mounted at the web root (https://host/login) or in a subdirectory
 * (https://host/move_detect/login) when the hosting account's www/ already serves another
 * site. Routes are declared as '/login', '/api/events', ... — so if the mount prefix is not
 * stripped from the request path, EVERY route 404s and the whole dashboard is dead.
 *
 * The prefix comes from SCRIPT_NAME, which the web server sets. It is never read from
 * client-controlled input (a query param or header would let a caller relocate the app).
 */
final class BasePathTest extends TestCase
{
    /** @return array<string, array{string, string, string}> */
    public static function mounts(): array
    {
        //                             SCRIPT_NAME               REQUEST_URI                        expected
        return [
            'web root'            => ['/index.php',             '/login',                          '/login'],
            'web root, query'     => ['/index.php',             '/api/events?since=5',             '/api/events'],
            'web root, bare'      => ['/index.php',             '/',                               '/'],
            'subdir'              => ['/move_detect/index.php', '/move_detect/login',              '/login'],
            'subdir, query'       => ['/move_detect/index.php', '/move_detect/api/events?since=5', '/api/events'],
            'subdir, bare'        => ['/move_detect/index.php', '/move_detect/',                   '/'],
            'subdir, no slash'    => ['/move_detect/index.php', '/move_detect',                    '/'],
            'subdir, param route' => ['/move_detect/index.php', '/move_detect/events/42',          '/events/42'],
            'nested subdir'       => ['/a/b/index.php',         '/a/b/api/csrf',                   '/api/csrf'],
        ];
    }

    #[DataProvider('mounts')]
    public function testBasePathIsStrippedFromTheRoutedPath(
        string $scriptName, string $requestUri, string $expected): void
    {
        $this->assertSame($expected, Request::pathFor($requestUri, Request::baseFrom($scriptName)));
    }

    public function testBaseFromScriptName(): void
    {
        $this->assertSame('', Request::baseFrom('/index.php'));
        $this->assertSame('/move_detect', Request::baseFrom('/move_detect/index.php'));
        $this->assertSame('/a/b', Request::baseFrom('/a/b/index.php'));
        // Missing/odd SCRIPT_NAME must degrade to "mounted at the root", never to a prefix
        // that would silently swallow the first path segment of every request.
        $this->assertSame('', Request::baseFrom(''));
        $this->assertSame('', Request::baseFrom('index.php'));
    }

    public function testAPathThatMerelyResemblesTheBaseIsNotTruncated(): void
    {
        // '/move_detected/x' starts with the literal string '/move_detect' but is NOT inside
        // the mount. A naive str_starts_with() would rewrite it to 'ed/x'.
        $base = Request::baseFrom('/move_detect/index.php');
        $this->assertSame('/move_detected/x', Request::pathFor('/move_detected/x', $base));
    }

    public function testRouterMatchesDeclaredRoutesWhenMountedInASubdirectory(): void
    {
        $r = new Router();
        $r->add('GET', '/api/events', fn() => Response::json(['ok' => true]));
        $r->add('GET', '/events/{id}', fn($q, $p) => Response::json(['id' => $p['id']]));

        $base = Request::baseFrom('/move_detect/index.php');

        $list = new Request('GET', Request::pathFor('/move_detect/api/events', $base), [], '');
        $this->assertSame(200, $r->dispatch($list)->status());

        $detail = new Request('GET', Request::pathFor('/move_detect/events/42', $base), [], '');
        $this->assertSame(['id' => '42'], json_decode($r->dispatch($detail)->body(), true));
    }

    public function testRouteParamsAreRawUrlDecoded(): void
    {
        // A camera_id with a space or Korean characters is %-encoded in the URL. Without
        // decoding the captured param, GET /api/zones/{camera} can never match what
        // POST /api/zones saved — zones save but never load back.
        $r = new Router();
        $r->add('GET', '/api/zones/{camera}', fn($q, $p) => Response::json(['camera' => $p['camera']]));
        $res = $r->dispatch(new Request('GET', '/api/zones/cam%20A', [], ''));
        $this->assertSame('cam A', json_decode($res->body(), true)['camera']);
        $res2 = $r->dispatch(new Request('GET', '/api/zones/%EA%B0%80', [], ''));  // "가"
        $this->assertSame('가', json_decode($res2->body(), true)['camera']);
    }

    public function testFromGlobalsHonoursScriptNameWithoutTrustingClientInput(): void
    {
        $_SERVER['REQUEST_METHOD'] = 'GET';
        $_SERVER['SCRIPT_NAME'] = '/move_detect/index.php';
        $_SERVER['REQUEST_URI'] = '/move_detect/zones';
        $this->assertSame('/zones', Request::fromGlobals()->path());
    }
}