<?php

namespace App\Osint\Runners;

use App\Models\Target;
use App\Osint\Runner;
use App\Osint\RunnerException;
use App\Osint\RunnerResult;
use Illuminate\Support\Facades\File;
use Illuminate\Support\Facades\Process;
use Illuminate\Support\Str;

class SherlockRunner implements Runner
{
    public function run(Target $target): RunnerResult
    {
        if ($target->type !== 'username') {
            throw new RunnerException('Sherlock only supports "username" targets.');
        }

        if (! preg_match('/^[a-zA-Z0-9._-]+$/', $target->value)) {
            throw new RunnerException('Username contains characters that are not safe to check.');
        }

        $binary = config('osint.python_venv').'/bin/sherlock';
        if (! is_executable($binary)) {
            throw new RunnerException("Sherlock binary not found or not executable at [{$binary}]. Run the setup in scripts/python/README.md.");
        }

        $runDir = storage_path('app/osint/runs/'.Str::uuid());
        File::ensureDirectoryExists($runDir);

        try {
            $result = Process::path($runDir)
                ->timeout((int) config('osint.run_timeout'))
                ->run([
                    $binary,
                    $target->value,
                    '--csv',
                    '--no-color',
                    '--no-txt',
                    '--timeout', '30',
                ]);

            if (! $result->successful()) {
                throw new RunnerException('Sherlock exited with an error: '.$result->errorOutput());
            }

            $csvPath = $runDir.'/'.$target->value.'.csv';
            if (! File::exists($csvPath)) {
                throw new RunnerException('Sherlock did not produce the expected CSV output.');
            }

            $rows = $this->parseCsv($csvPath);

            $summary = count($rows) > 0
                ? sprintf('Found on %d site%s: %s', count($rows), count($rows) === 1 ? '' : 's', collect($rows)->pluck('name')->implode(', '))
                : 'No matching profiles found.';

            return new RunnerResult(raw: ['matches' => $rows], summary: $summary);
        } finally {
            File::deleteDirectory($runDir);
        }
    }

    /**
     * @return array<int, array{name: string, url: string, http_status: int|null}>
     */
    private function parseCsv(string $path): array
    {
        $handle = fopen($path, 'r');
        $header = fgetcsv($handle);
        $rows = [];

        while (($row = fgetcsv($handle)) !== false) {
            $data = array_combine($header, $row);
            $rows[] = [
                'name' => $data['name'],
                'url' => $data['url_user'],
                'http_status' => $data['http_status'] !== '' ? (int) $data['http_status'] : null,
            ];
        }

        fclose($handle);

        return $rows;
    }
}