<?php

namespace Modules\EcommerceFinance\Services;

use Illuminate\Database\ConnectionInterface;
use Illuminate\Database\DatabaseManager;
use Illuminate\Support\Facades\Schema;
use InvalidArgumentException;

class BusinessDataPlacement
{
    private readonly ConnectionInterface $connection;

    public function __construct(DatabaseManager $database)
    {
        $this->connection = $database->connection(
            (string) config('upstream_mirrors.connection', 'business_mirror'),
        );
    }

    /** @return array<string,array<string,mixed>> */
    public function policies(): array
    {
        return (array) config('business_data.datasets', []);
    }

    /** @return array<string,mixed> */
    public function policy(string $datasetKey): array
    {
        $policy = (array) ($this->policies()[$datasetKey] ?? []);
        if ($policy === []) {
            // Missing and runtime-registered connector datasets fail closed to
            // MariaDB. `business-data:plan` still fails CI/operations for a
            // missing code-owned policy, while a typo can never silently route
            // production data into ClickHouse.
            return [
                'role' => 'external_dimension',
                'target_store' => 'mariadb',
                'consumer' => '外部登记数据集',
                'sync' => 'always',
            ];
        }

        return $policy + ['sync' => 'always'];
    }

    public function targetStore(string $datasetKey): string
    {
        return (string) ($this->policy($datasetKey)['target_store'] ?? 'mariadb');
    }

    public function shouldSchedule(string $datasetKey): bool
    {
        $sync = (string) ($this->policy($datasetKey)['sync'] ?? 'always');

        return match ($sync) {
            'always' => true,
            'disabled' => false,
            'after_columnar_activation' => $this->isActive($datasetKey, 'clickhouse'),
            default => throw new InvalidArgumentException('业务数据集同步策略无效：' . $datasetKey),
        };
    }

    public function isActive(string $datasetKey, ?string $store = null): bool
    {
        $row = $this->state($datasetKey);
        if ($row === null || ($row['phase'] ?? null) !== 'active') {
            return false;
        }

        return $store === null || ($row['target_store'] ?? null) === $store;
    }

    /** @return array<string,mixed>|null */
    public function state(string $datasetKey): ?array
    {
        if (! Schema::connection($this->connection->getName())->hasTable('business_data_placements')) {
            return null;
        }

        $row = $this->connection->table('business_data_placements')
            ->where('dataset_key', $datasetKey)
            ->first();

        return $row === null ? null : (array) $row;
    }

    /** @param array<string,mixed> $values */
    public function save(string $datasetKey, array $values): void
    {
        $now = now();
        $this->connection->table('business_data_placements')->insertOrIgnore([
            'dataset_key' => $datasetKey,
            'target_store' => $this->targetStore($datasetKey),
            'phase' => 'planned',
            'created_at' => $now,
            'updated_at' => $now,
        ]);
        $this->connection->table('business_data_placements')
            ->where('dataset_key', $datasetKey)
            ->update(['updated_at' => $now] + $values);
    }

    public function connection(): ConnectionInterface
    {
        return $this->connection;
    }
}