<?php

declare(strict_types=1);

namespace KTXT\ProviderImap\Tests\Unit;

use FilesystemIterator;
use InvalidArgumentException;
use KTXM\ProviderImap\Stores\MessageFileStore;
use PHPUnit\Framework\TestCase;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;

final class MessageFileStoreTest extends TestCase
{
    private string $root;
    private MessageFileStore $store;

    protected function setUp(): void
    {
        $this->root = sys_get_temp_dir() . '/ktrix-imap-cache-' . bin2hex(random_bytes(4));
        $this->store = new MessageFileStore($this->root);
    }

    protected function tearDown(): void
    {
        if (!is_dir($this->root)) {
            return;
        }
        $items = new RecursiveIteratorIterator(
            new RecursiveDirectoryIterator($this->root, FilesystemIterator::SKIP_DOTS),
            RecursiveIteratorIterator::CHILD_FIRST,
        );
        foreach ($items as $item) {
            $item->isDir() ? rmdir($item->getPathname()) : unlink($item->getPathname());
        }
        rmdir($this->root);
    }

    public function testWriteThenReadReturnsContent(): void
    {
        $content = ['schemaVersion' => 1, 'properties' => ['subject' => 'Grüße / ✓']];

        $this->store->write('tenant', 'svc', 'INBOX/Reports', 7, 42, $content);

        $this->assertSame($content, $this->store->read('tenant', 'svc', 'INBOX/Reports', 7, 42));
        $this->assertFileExists(sprintf(
            '%s/storage/tenant/provider_imap/svc/%s/7/42/message.json',
            $this->root,
            sha1('INBOX/Reports'),
        ));
    }

    public function testWriteReplacesAndLeavesNoTemporaryFiles(): void
    {
        $this->store->write('tenant', 'svc', 'INBOX', 7, 42, ['v' => 1]);
        $this->store->write('tenant', 'svc', 'INBOX', 7, 42, ['v' => 2]);

        $this->assertSame(['v' => 2], $this->store->read('tenant', 'svc', 'INBOX', 7, 42));
        $folder = sprintf('%s/storage/tenant/provider_imap/svc/%s/7/42', $this->root, sha1('INBOX'));
        $this->assertSame(['message.json'], array_values(array_diff(scandir($folder), ['.', '..'])));
    }

    public function testReadOfMissingOrCorruptContentReturnsNull(): void
    {
        $this->assertNull($this->store->read('tenant', 'svc', 'INBOX', 7, 42));

        $this->store->write('tenant', 'svc', 'INBOX', 7, 42, ['v' => 1]);
        file_put_contents(
            sprintf('%s/storage/tenant/provider_imap/svc/%s/7/42/message.json', $this->root, sha1('INBOX')),
            '{truncated',
        );

        $this->assertNull($this->store->read('tenant', 'svc', 'INBOX', 7, 42));
    }

    public function testDeleteScopes(): void
    {
        $this->store->write('tenant', 'svc', 'INBOX', 7, 1, ['v' => 1]);
        $this->store->write('tenant', 'svc', 'INBOX', 7, 2, ['v' => 2]);
        $this->store->write('tenant', 'svc', 'Sent', 3, 1, ['v' => 3]);
        $this->store->write('tenant', 'other', 'INBOX', 7, 1, ['v' => 4]);

        $this->store->delete('tenant', 'svc', 'INBOX', 7, 1);
        $this->assertNull($this->store->read('tenant', 'svc', 'INBOX', 7, 1));
        $this->assertNotNull($this->store->read('tenant', 'svc', 'INBOX', 7, 2));

        $this->store->deleteByMailbox('tenant', 'svc', 'INBOX');
        $this->assertNull($this->store->read('tenant', 'svc', 'INBOX', 7, 2));
        $this->assertNotNull($this->store->read('tenant', 'svc', 'Sent', 3, 1));

        $this->store->deleteByService('tenant', 'svc');
        $this->assertNull($this->store->read('tenant', 'svc', 'Sent', 3, 1));
        $this->assertDirectoryDoesNotExist($this->root . '/storage/tenant/provider_imap/svc');
        $this->assertNotNull($this->store->read('tenant', 'other', 'INBOX', 7, 1));
    }

    public function testIdentifiersThatCouldEscapeTheRootAreRejected(): void
    {
        $this->expectException(InvalidArgumentException::class);
        $this->store->write('tenant', '../escape', 'INBOX', 7, 1, []);
    }
}