<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;
use Modules\EcommerceFinance\Services\BusinessMirrorDatasetRegistry;
use Modules\EcommerceFinance\Services\UpstreamSourceRegistry;
use Throwable;

class RegisterBusinessMirror extends Command
{
    protected $signature = 'business-mirror:register {source} {schema} {object}
        {--keys= : 逗号分隔的稳定唯一键}
        {--columns= : 逗号分隔的明确同步字段，必须包含稳定键及增量字段}
        {--watermark= : 可靠更新时间字段；留空为仅按主键追加}
        {--enable-sync : 启用并批准可断点首次同步及后续增量}
        {--disable-sync : 停用此数据集的自动同步，保留镜像数据}';

    protected $description = '登记声明式镜像数据集；生产启用前需获得同步范围授权';

    public function handle(BusinessMirrorDatasetRegistry $datasets, UpstreamSourceRegistry $sources): int
    {
        if (! Schema::hasTable('business_mirror_datasets')) {
            $this->error('尚未执行镜像数据集登记表迁移。');
            return self::FAILURE;
        }
        $source = (string) $this->argument('source');
        $schema = (string) $this->argument('schema');
        $object = (string) $this->argument('object');
        $key = $source . '.' . $schema . '.' . $object;
        try {
            $sources->definition($source);
            if (strlen($key) > 191 || isset(config('upstream_mirrors.datasets', [])[$key])) {
                throw new \RuntimeException('数据集键过长或由现有代码维护，不能覆盖。');
            }
            if ($this->option('disable-sync')) {
                if ($this->option('enable-sync')) throw new \RuntimeException('不能同时启用和停用。');
                if (DB::table('business_mirror_datasets')->where('dataset_key', $key)->update(['sync_enabled' => false, 'updated_at' => now()]) !== 1) {
                    throw new \RuntimeException('未找到该登记数据集。');
                }
                $this->info('已停止自动同步，现有镜像保留。');
                return self::SUCCESS;
            }
            $keys = $this->csv((string) $this->option('keys'));
            $columns = $this->csv((string) $this->option('columns'));
            $watermark = trim((string) $this->option('watermark'));
            if ($keys === [] || $columns === [] || array_diff([...$keys, ...($watermark === '' ? [] : [$watermark])], $columns)) {
                throw new \RuntimeException('请明确字段和稳定键；同步字段必须包含稳定键及增量字段。');
            }
            $catalog = DB::table('upstream_schema_columns')->where('source_key', $source)
                ->where('schema_name', $schema)->where('object_name', $object)->pluck('column_name')->all();
            if (array_diff($columns, $catalog)) {
                throw new \RuntimeException('字段不在数据字典中，请先同步该来源字典并核实字段。');
            }
            $definition = ['source_key' => $source, 'schema' => $schema, 'object' => $object,
                'target' => 'mirror_' . substr(hash('sha256', $key), 0, 24),
                'keys' => $keys, 'columns' => $columns, 'watermark' => $watermark];
            $datasets->validate($key, $definition);
            $enable = (bool) $this->option('enable-sync');
            DB::transaction(function () use ($key, $source, $definition, $enable): void {
                $existing = DB::table('business_mirror_datasets')->where('dataset_key', $key)->lockForUpdate()->first();
                if ($existing !== null && json_decode($existing->definition, true) != $definition) {
                    throw new \RuntimeException('已有数据集定义不同，不能覆盖稳定键、字段或同步游标。请先完成变更评估。');
                }
                if ($existing !== null) {
                    if ($enable) DB::table('business_mirror_datasets')->where('dataset_key', $key)->update([
                        'sync_enabled' => true, 'initial_sync_approved' => true, 'updated_at' => now(),
                    ]);
                    return;
                }
                DB::table('business_mirror_datasets')->insert([
                    'dataset_key' => $key, 'source_key' => $source, 'definition' => json_encode($definition, JSON_THROW_ON_ERROR),
                    'sync_enabled' => $enable, 'initial_sync_approved' => $enable, 'created_at' => now(), 'updated_at' => now(),
                ]);
            });
            $this->info($key . ($enable ? '：已启用，生产调度将自动执行首次同步并持续增量。' : '：已登记，自动同步未启用。'));
            return self::SUCCESS;
        } catch (\Illuminate\Database\QueryException) {
            $this->error('登记失败，请检查系统数据库状态；原数据集保留。');
        } catch (\RuntimeException|\InvalidArgumentException $e) {
            $this->error($e->getMessage());
        } catch (Throwable) {
            $this->error('登记失败，未启用新同步。请检查系统数据库状态。');
        }
        return self::FAILURE;
    }

    private function csv(string $value): array
    {
        return array_values(array_unique(array_filter(array_map('trim', explode(',', $value)))));
    }
}