<?php

declare(strict_types=1);

namespace Weerscherm\Tests;

use PHPUnit\Framework\TestCase;
use Weerscherm\Cache;

final class CacheTest extends TestCase
{
    private string $dir;

    protected function setUp(): void
    {
        $this->dir = sys_get_temp_dir() . '/weerscherm-cache-' . uniqid();
    }

    protected function tearDown(): void
    {
        array_map('unlink', glob($this->dir . '/*') ?: []);
        @rmdir($this->dir);
    }

    public function testWriteThenReadRoundTrip(): void
    {
        $cache = new Cache($this->dir);
        $cache->write('stations', ['a' => 1.5, 'b' => null], 1000);

        self::assertSame(['data' => ['a' => 1.5, 'b' => null], 'stored_at' => 1000], $cache->read('stations'));
    }

    public function testMissingKeyReadsNull(): void
    {
        self::assertNull((new Cache($this->dir))->read('nope'));
    }

    public function testCorruptFileReadsNull(): void
    {
        mkdir($this->dir, 0700, true);
        file_put_contents($this->dir . '/broken.json', '{not json');

        self::assertNull((new Cache($this->dir))->read('broken'));
    }

    public function testFreshness(): void
    {
        $cache = new Cache($this->dir);
        $cache->write('k', [], 1000);

        self::assertTrue($cache->isFresh('k', 300, 1299));
        self::assertFalse($cache->isFresh('k', 300, 1300));
        self::assertFalse($cache->isFresh('missing', 300, 1000));
    }

    public function testKeyIsSanitised(): void
    {
        $cache = new Cache($this->dir);
        $cache->write('../Evil Key', ['x' => 1], 1);

        self::assertFileExists($this->dir . '/evil_key.json');
        self::assertSame(['x' => 1], $cache->read('../Evil Key')['data']);
    }

    public function testWriteCreatesDirectory(): void
    {
        (new Cache($this->dir . '/nested'))->write('k', [], 1);
        self::assertDirectoryExists($this->dir . '/nested');
        unlink($this->dir . '/nested/k.json');
        rmdir($this->dir . '/nested');
    }
}