<?php

namespace App\Services\Settlement;

use App\Models\Draw;
use App\Lottery\DrawStatus;
use App\Models\DrawResultBatch;
use Illuminate\Support\Facades\DB;
use App\Lottery\DrawResultBatchStatus;

/**
 * 将期号推进到可结算状态。
 *
 * 冷静期内的人工操作只跳过当前期剩余的核错窗口，不修改全局冷静期配置。
 */
final class DrawSettlementStartService
{
    /**
     * @return array{draw: Draw, cooldown_skipped: bool}
     */
    public function start(Draw $draw): array
    {
        return DB::transaction(function () use ($draw): array {
            /** @var Draw $locked */
            $locked = Draw::query()->whereKey($draw->id)->lockForUpdate()->firstOrFail();

            if (! in_array($locked->status, [
                DrawStatus::Cooldown->value,
                DrawStatus::Settling->value,
            ], true)) {
                throw new \RuntimeException('draw_not_ready_for_settlement');
            }

            $hasPublishedResult = DrawResultBatch::query()
                ->where('draw_id', $locked->id)
                ->where('status', DrawResultBatchStatus::Published->value)
                ->exists();

            if (! $hasPublishedResult) {
                throw new \RuntimeException('draw_result_not_published');
            }

            $cooldownSkipped = $locked->status === DrawStatus::Cooldown->value;
            if ($cooldownSkipped) {
                $locked->forceFill([
                    'status' => DrawStatus::Settling->value,
                    'cooling_end_time' => now(),
                ])->save();
            }

            return [
                'draw' => $locked->fresh(),
                'cooldown_skipped' => $cooldownSkipped,
            ];
        });
    }
}