<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Support\Facades\Log;
use InvalidArgumentException;
use Modules\EcommerceFinance\Services\UpstreamOdbcConnection;
use Modules\EcommerceFinance\Services\UpstreamQueryCacheFactory;
use Modules\EcommerceFinance\Services\UpstreamSnapshotRefresherRegistry;
use Modules\EcommerceFinance\Services\UpstreamSourceRegistry;
use Throwable;

class UpstreamRefreshActiveSnapshots extends Command
{
    protected $signature = 'upstream:snapshots:refresh
        {source : config/upstreams.php 中登记的数据源标识}
        {--limit= : 本轮最多刷新的活跃查询数}';

    protected $description = '在各自时间、并发和查询预算内刷新指定上游的活跃快照';

    public function handle(
        UpstreamSourceRegistry $sources,
        UpstreamQueryCacheFactory $caches,
        UpstreamSnapshotRefresherRegistry $refreshers,
    ): int {
        $source = (string) $this->argument('source');

        try {
            $definition = $sources->definition($source);
        } catch (InvalidArgumentException $exception) {
            $this->components->error($exception->getMessage());

            return self::FAILURE;
        }

        if (! $sources->enabled($source)) {
            $this->components->info($definition['label'] . '同步未启用，本轮跳过。');

            return self::SUCCESS;
        }

        try {
            $cache = $caches->forSource($source);
            $refresher = $refreshers->forSource($source);
        } catch (InvalidArgumentException $exception) {
            $this->components->error($exception->getMessage());

            return self::FAILURE;
        }

        $configuredLimit = max((int) $cache->setting('snapshots.refresh_limit', 2), 1);
        $requestedLimit = (int) ($this->option('limit') ?: $configuredLimit);
        $entries = $cache->activeEntries(min(max($requestedLimit, 1), $configuredLimit));
        $timeBudget = max((int) $cache->setting('snapshots.refresh_time_budget_seconds', 45), 10);
        $startedAt = microtime(true);

        if ($entries === []) {
            $this->components->info('没有需要刷新的活跃查询。');

            return self::SUCCESS;
        }

        $fresh = 0;
        $stale = 0;
        $failed = 0;

        foreach ($entries as $entry) {
            if ((microtime(true) - $startedAt) >= $timeBudget) {
                $this->components->info('本轮刷新已达到时间预算，剩余查询留到下一轮。');
                break;
            }

            try {
                $status = $refresher->refresh($entry);
                $status === 'fresh' ? $fresh++ : $stale++;
            } catch (Throwable $exception) {
                // 单个查询失败只重置当前来源连接并跳过该查询，不能让它
                // 每分钟阻断同一来源的其他页面。
                UpstreamOdbcConnection::reset($source);
                $failed++;
                Log::error('上游活跃快照刷新失败，本轮已跳过该查询。', [
                    'source' => $definition['key'],
                    'source_label' => $definition['label'],
                    'scope' => $entry['scope'] ?? 'unknown',
                    'exception' => $exception::class,
                ]);
                $this->components->warn('一个上游查询刷新失败，已跳过并继续；错误类型：' . $exception::class);
            }

            $pauseMs = max((int) $cache->setting('snapshots.refresh_pause_ms', 300), 0);

            if ($pauseMs > 0) {
                usleep($pauseMs * 1000);
            }
        }

        $this->components->info("快照刷新完成：新鲜 {$fresh}，沿用旧快照 {$stale}，失败 {$failed}。");

        return $failed > 0 ? self::FAILURE : self::SUCCESS;
    }
}