<?php

declare(strict_types = 1);

namespace Foundation\Tests\Unit\Core\Cache;

use DateInterval;
use Foundation\Core\Cache\ArrayCache;
use PHPUnit\Framework\TestCase;
use Psr\SimpleCache\InvalidArgumentException;
use stdClass;

class ArrayCacheTest extends TestCase
{
    private ArrayCache $cache;

    protected function setUp(): void {
        $this->cache = new ArrayCache();
    }

    public function testCanSetAndGetValue(): void {
        $setResult = $this->cache->set('key1', 'value1');

        self::assertSame('value1', $this->cache->get('key1'));
        self::assertTrue($setResult);
    }

    public function testReturnsDefaultWhenKeyNotExists(): void {
        self::assertNull($this->cache->get('nonexistent'));
        self::assertSame('default', $this->cache->get('nonexistent', 'default'));
    }

    public function testReturnsExistsStateForCacheKeys(): void {
        $this->cache->set('key1', 'value1');

        self::assertTrue($this->cache->has('key1'));
        self::assertFalse($this->cache->has('nonexistent'));
    }

    public function testCanDeleteAKey(): void {
        $this->cache->set('key1', 'value1');
        self::assertTrue($this->cache->has('key1'));

        $deleteResult = $this->cache->delete('key1');
        self::assertFalse($this->cache->has('key1'));
        self::assertTrue($deleteResult);
    }

    public function testReturnsTrueForDeletionEvenForNonExistentKey(): void {
        $result = $this->cache->delete('nonexistent');

        self::assertTrue($result);
    }

    public function testCanClearAllKeys(): void {
        $this->cache->set('key1', 'value1');
        $this->cache->set('key2', 'value2');

        $this->cache->clear();

        self::assertFalse($this->cache->has('key1'));
        self::assertFalse($this->cache->has('key2'));
    }

    public function testConsidersTtlForCacheItemsWithIntegers(): void {
        $this->cache->set('key1', 'value1', 1);

        self::assertTrue($this->cache->has('key1'));
        self::assertSame('value1', $this->cache->get('key1'));

        // Sleep to let TTL expire
        sleep(2);

        self::assertFalse($this->cache->has('key1'));
        self::assertNull($this->cache->get('key1'));
    }

    public function testConsidersTtlForCacheItemsWithDateIntervals(): void {
        $interval = new DateInterval('PT1S'); // 1 second
        $this->cache->set('key1', 'value1', $interval);

        self::assertTrue($this->cache->has('key1'));
        self::assertSame('value1', $this->cache->get('key1'));

        // Sleep to let TTL expire
        sleep(2);

        self::assertFalse($this->cache->has('key1'));
        self::assertNull($this->cache->get('key1'));
    }

    public function testReturnsArrayIfMultipleItemsAreRequested(): void {
        $this->cache->set('key1', 'value1');
        $this->cache->set('key2', 'value2');

        $result = $this->cache->getMultiple(['key1', 'key2', 'key3'], 'default');

        self::assertSame(
            [
                'key1' => 'value1',
                'key2' => 'value2',
                'key3' => 'default',
            ],
            $result,
        );
    }

    public function testCanSetMultipleItems(): void {
        $values = [
            'key1' => 'value1',
            'key2' => 'value2',
            'key3' => 'value3',
        ];

        $result = $this->cache->setMultiple($values);

        self::assertTrue($result);
        self::assertSame('value1', $this->cache->get('key1'));
        self::assertSame('value2', $this->cache->get('key2'));
        self::assertSame('value3', $this->cache->get('key3'));
    }

    public function testCanSetMultipleItemsWithTtl(): void {
        $values = [
            'key1' => 'value1',
            'key2' => 'value2',
        ];

        $this->cache->setMultiple($values, 1);

        self::assertTrue($this->cache->has('key1'));
        self::assertTrue($this->cache->has('key2'));

        sleep(2);

        self::assertFalse($this->cache->has('key1'));
        self::assertFalse($this->cache->has('key2'));
    }

    public function testCanDeleteMultipleItemsByKey(): void {
        $this->cache->set('key1', 'value1');
        $this->cache->set('key2', 'value2');
        $this->cache->set('key3', 'value3');

        $result = $this->cache->deleteMultiple(['key1', 'key3']);

        self::assertTrue($result);
        self::assertFalse($this->cache->has('key1'));
        self::assertTrue($this->cache->has('key2'));
        self::assertFalse($this->cache->has('key3'));
    }

    public function testCanStoreComplexDataTypes(): void {
        $array = ['nested' => ['data' => 'value']];
        $object = new stdClass();
        $object->property = 'test';

        $this->cache->set('array', $array);
        $this->cache->set('object', $object);

        self::assertSame($array, $this->cache->get('array'));
        self::assertEquals($object, $this->cache->get('object'));
    }

    public function testThrowsExceptionOnInvalidKeys(): void {
        $this->expectException(InvalidArgumentException::class);

        $this->cache->set('invalid{key}', 'value');
    }

    public function testThrowsExceptionOnEmptyKeys(): void {
        $this->expectException(InvalidArgumentException::class);

        $this->cache->set('', 'value');
    }

    public function testThrowsExceptionOnKeysWithInvalidCharacters(): void {
        $invalidKeys = ['key{', 'key}', 'key(', 'key)', 'key/', 'key\\', 'key@', 'key:'];

        foreach ($invalidKeys as $key) {
            try {
                $this->cache->set($key, 'value');
                self::fail("Expected InvalidArgumentException for key: $key");
            } catch (InvalidArgumentException $e) {
                // Expected exception
                self::assertTrue(true);
            }
        }
    }

    public function testExpiredKeysAreRemovedOnAccess(): void {
        $this->cache->set('key1', 'value1', 1);

        // Verify it exists initially
        self::assertTrue($this->cache->has('key1'));

        // Wait for expiry
        sleep(2);

        // Access should trigger cleanup
        self::assertFalse($this->cache->has('key1'));
        self::assertNull($this->cache->get('key1'));
    }
}