<?php

namespace Tests\Unit;

use App\Services\Tool\Tools\LsTool;
use InvalidArgumentException;
use PHPUnit\Framework\TestCase;

class LsToolTest extends TestCase
{
    private string $tempDirectory;

    protected function setUp(): void
    {
        parent::setUp();

        $base = rtrim(sys_get_temp_dir(), DIRECTORY_SEPARATOR);
        $this->tempDirectory = $base.DIRECTORY_SEPARATOR.'ls-tool-'.bin2hex(random_bytes(8));

        if (! mkdir($this->tempDirectory, 0777, true) && ! is_dir($this->tempDirectory)) {
            $this->fail('无法创建临时目录：'.$this->tempDirectory);
        }

        file_put_contents($this->tempDirectory.DIRECTORY_SEPARATOR.'a.txt', 'a');
        file_put_contents($this->tempDirectory.DIRECTORY_SEPARATOR.'b.php', '<?php echo 1;');
        file_put_contents($this->tempDirectory.DIRECTORY_SEPARATOR.'.env', 'KEY=VALUE');

        mkdir($this->tempDirectory.DIRECTORY_SEPARATOR.'dir', 0777, true);
    }

    protected function tearDown(): void
    {
        $this->deleteDirectory($this->tempDirectory);

        parent::tearDown();
    }

    public function test_execute_lists_entries_in_directory(): void
    {
        $tool = new LsTool;
        $result = $tool->execute(['directory' => $this->tempDirectory]);

        $this->assertSame($this->tempDirectory, $result['directory']);
        $this->assertSame(['.env', 'a.txt', 'b.php', 'dir'], $result['entries']);
    }

    public function test_execute_can_exclude_hidden_entries(): void
    {
        $tool = new LsTool;
        $result = $tool->execute([
            'directory' => $this->tempDirectory,
            'include_hidden' => false,
        ]);

        $this->assertSame(['a.txt', 'b.php', 'dir'], $result['entries']);
    }

    public function test_execute_can_filter_files_only(): void
    {
        $tool = new LsTool;
        $result = $tool->execute([
            'directory' => $this->tempDirectory,
            'filter' => 'files',
        ]);

        $this->assertSame(['.env', 'a.txt', 'b.php'], $result['entries']);
    }

    public function test_execute_can_filter_directories_only(): void
    {
        $tool = new LsTool;
        $result = $tool->execute([
            'directory' => $this->tempDirectory,
            'filter' => 'directories',
        ]);

        $this->assertSame(['dir'], $result['entries']);
    }

    public function test_execute_can_match_glob_pattern(): void
    {
        $tool = new LsTool;
        $result = $tool->execute([
            'directory' => $this->tempDirectory,
            'match' => '*.php',
        ]);

        $this->assertSame(['b.php'], $result['entries']);
    }

    public function test_execute_can_return_details(): void
    {
        $tool = new LsTool;
        $result = $tool->execute([
            'directory' => $this->tempDirectory,
            'details' => true,
        ]);

        $this->assertCount(4, $result['entries']);

        $fileEntry = $this->findEntry($result['entries'], 'a.txt');
        $this->assertSame('file', $fileEntry['type']);
        $this->assertIsInt($fileEntry['size']);
        $this->assertIsInt($fileEntry['modified_at']);

        $dirEntry = $this->findEntry($result['entries'], 'dir');
        $this->assertSame('directory', $dirEntry['type']);
        $this->assertNull($dirEntry['size']);
    }

    public function test_execute_can_sort_by_mtime_desc(): void
    {
        $mtimeDirectory = $this->tempDirectory.DIRECTORY_SEPARATOR.'mtime';
        mkdir($mtimeDirectory, 0777, true);

        $older = $mtimeDirectory.DIRECTORY_SEPARATOR.'older.txt';
        $newer = $mtimeDirectory.DIRECTORY_SEPARATOR.'newer.txt';

        file_put_contents($older, 'old');
        file_put_contents($newer, 'new');

        $now = time();
        touch($older, $now - 10);
        touch($newer, $now - 5);

        $tool = new LsTool;
        $result = $tool->execute([
            'directory' => $mtimeDirectory,
            'include_hidden' => false,
            'sort' => 'mtime_desc',
            'filter' => 'files',
            'match' => '*.txt',
        ]);

        $this->assertSame(['newer.txt', 'older.txt'], $result['entries']);
    }

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

        $tool = new LsTool;
        $tool->execute(['directory' => $this->tempDirectory.DIRECTORY_SEPARATOR.'missing']);
    }

    /**
     * @param  array<int, array<string, mixed>>  $entries
     * @return array<string, mixed>
     */
    private function findEntry(array $entries, string $name): array
    {
        foreach ($entries as $entry) {
            if (($entry['name'] ?? null) === $name) {
                return $entry;
            }
        }

        $this->fail('未找到条目：'.$name);
    }

    private function deleteDirectory(string $directory): void
    {
        if (! is_dir($directory)) {
            return;
        }

        $items = scandir($directory);
        if ($items === false) {
            return;
        }

        foreach ($items as $item) {
            if ($item === '.' || $item === '..') {
                continue;
            }

            $path = $directory.DIRECTORY_SEPARATOR.$item;
            if (is_dir($path)) {
                $this->deleteDirectory($path);

                continue;
            }

            @unlink($path);
        }

        @rmdir($directory);
    }
}