<?php

declare(strict_types=1);

namespace app\common\service\pharmacy;

use DomainException;
use RuntimeException;
use Throwable;

final class EjMedicineCatalogSyncWorkflow
{
    private $acquireLock;
    private $releaseLock;
    private $loadCursor;
    private $fetchPage;
    private $mergePage;
    private $markSuccess;
    private $markFailure;

    public function __construct(
        callable $acquireLock,
        callable $releaseLock,
        callable $loadCursor,
        callable $fetchPage,
        callable $mergePage,
        callable $markSuccess,
        callable $markFailure
    ) {
        $this->acquireLock = $acquireLock;
        $this->releaseLock = $releaseLock;
        $this->loadCursor = $loadCursor;
        $this->fetchPage = $fetchPage;
        $this->mergePage = $mergePage;
        $this->markSuccess = $markSuccess;
        $this->markFailure = $markFailure;
    }

    /** @return array{pages:int,pulled:int,received:int,created:int,updated:int,unchanged:int,deactivated:int,cursor:int} */
    public function sync(int $limit = 200): array
    {
        if (!(bool) ($this->acquireLock)()) {
            throw new DomainException('洛阳药房目录正在同步，请稍后重试');
        }

        $cursor = 0;
        $stats = [
            'pages' => 0,
            'pulled' => 0,
            'received' => 0,
            'created' => 0,
            'updated' => 0,
            'unchanged' => 0,
            'deactivated' => 0,
            'cursor' => $cursor,
        ];

        try {
            $cursor = max(0, (int) ($this->loadCursor)());
            $stats['cursor'] = $cursor;
            for ($page = 0; $page < 1000; ++$page) {
                $parsed = EjMedicineCatalogSyncPolicy::parsePage(
                    ($this->fetchPage)($cursor, min(max($limit, 1), 500)),
                    $cursor
                );
                $merged = ($this->mergePage)($parsed['items'], $parsed['next_cursor']);
                ++$stats['pages'];
                $pulled = count($parsed['items']);
                $stats['pulled'] += $pulled;
                $stats['received'] += $pulled;
                foreach (['created', 'updated', 'unchanged', 'deactivated'] as $key) {
                    $stats[$key] += (int) ($merged[$key] ?? 0);
                }
                $cursor = $parsed['next_cursor'];
                $stats['cursor'] = $cursor;
                if (!$parsed['has_more']) {
                    ($this->markSuccess)($cursor, $stats);
                    return $stats;
                }
            }
            throw new RuntimeException('洛阳药房药材目录分页超过安全上限');
        } catch (Throwable $exception) {
            ($this->markFailure)($cursor, self::summarizeError($exception->getMessage()));
            throw $exception;
        } finally {
            ($this->releaseLock)();
        }
    }

    public static function summarizeError(string $message): string
    {
        $message = preg_replace('/(app[_-]?secret|signature|token|authorization)\s*[:=]\s*[^\s,;]+/i', '$1=[redacted]', $message) ?? $message;
        return mb_substr(trim($message), 0, 500);
    }
}