<?php

namespace Modules\Core\Command;

use Illuminate\Console\Command;
use Illuminate\Support\Facades\Storage;
use Modules\Core\ResultType\Error;
use Modules\Core\ResultType\Result;
use Modules\Core\ResultType\Success;
use ZipArchive;

class ExportCommand extends Command
{
    protected $signature = "boboko:export";

    protected $description = "Export data and files";

    public function handle(): void
    {
        $db = config("database.connections.pgsql");

        $disk = Storage::disk("local");
        $exportDir = $disk->path("exports");
        if (!is_dir($exportDir)) {
            mkdir($exportDir, 0755, true);
        }

        $stamp = now()->format("Y_m_d_His");
        $sqlFile = $exportDir . "/dump_{$stamp}.sql";
        $zipFile = $exportDir . "/export_{$stamp}.zip";
        $publicDisk = Storage::disk("public");
        $filesDir = $publicDisk->path("");

        $result = $this->dumpDatabase($db, $sqlFile)->flatMap(
            fn($sql) => $this->buildZip($sql, $filesDir, $zipFile),
        );

        if (file_exists($sqlFile)) {
            unlink($sqlFile);
        }

        if ($result->error()->isDefined()) {
            $this->error($result->error()->get());
            return;
        }

        $this->info("Exported to {$zipFile}");
    }

    /** @return Result<string, string> */
    private function dumpDatabase(array $db, string $sqlFile): Result
    {
        $command = sprintf(
            "PGPASSWORD=%s pg_dump -h %s -p %s -U %s -d %s --no-owner --no-acl > %s",
            $db["password"],
            $db["host"],
            $db["port"],
            $db["username"],
            $db["database"],
            $sqlFile,
        );

        exec($command, result_code: $code);

        if ($code !== 0) {
            return Error::create("pg_dump failed.");
        }

        $this->info("Database dumped.");

        return Success::create($sqlFile);
    }

    /** @return Result<string, string> */
    private function buildZip(
        string $sqlFile,
        string $filesDir,
        string $zipFile,
    ): Result {
        $zip = new ZipArchive();
        if (
            $zip->open($zipFile, ZipArchive::CREATE | ZipArchive::OVERWRITE) !==
            true
        ) {
            return Error::create("Could not create zip archive.");
        }

        $zip->addFile($sqlFile, basename($sqlFile));

        if (is_dir($filesDir)) {
            $iterator = new \RecursiveIteratorIterator(
                new \RecursiveDirectoryIterator(
                    $filesDir,
                    \FilesystemIterator::SKIP_DOTS,
                ),
            );
            foreach ($iterator as $file) {
                $relativePath =
                    "files/" .
                    ltrim(
                        str_replace($filesDir, "", $file->getRealPath()),
                        DIRECTORY_SEPARATOR,
                    );
                $zip->addFile($file->getRealPath(), $relativePath);
            }
        }

        $zip->close();

        return Success::create($zipFile);
    }
}