<?php

namespace App\Services\Draw;

use App\Models\Draw;
use App\Models\AdminUser;
use App\Lottery\DrawStatus;
use App\Models\DrawResultBatch;
use App\Models\SettlementBatch;
use Illuminate\Support\Facades\DB;
use App\Services\LotterySettings;
use App\Lottery\DrawResultBatchStatus;
use App\Lottery\SettlementBatchStatus;

/**
 * 人工审核通过后发布结果；或 RNG 自动生成路径内联调用同一事务字段更新。
 */
final class DrawPublishService
{
    public function __construct(
        private readonly LotteryHallRealtimeBroadcaster $hallRealtime,
        private readonly DrawHallSnapshotBuilder $snapshot,
    ) {}

    public function publishManualBatch(DrawResultBatch $batch, AdminUser $admin): Draw
    {
        $draw = DB::transaction(function () use ($batch, $admin): Draw {
            /** @var DrawResultBatch $lockedBatch */
            $lockedBatch = DrawResultBatch::query()->whereKey($batch->id)->lockForUpdate()->firstOrFail();
            if ($lockedBatch->status !== DrawResultBatchStatus::PendingReview->value) {
                throw new \RuntimeException('batch_not_pending_review');
            }

            /** @var Draw $draw */
            $draw = Draw::query()->whereKey($lockedBatch->draw_id)->lockForUpdate()->firstOrFail();

            $this->assertDrawReadyToPublish($draw, $lockedBatch);

            DrawResultBatch::query()
                ->where('draw_id', $draw->id)
                ->where('id', '!=', $lockedBatch->id)
                ->where('status', DrawResultBatchStatus::Published->value)
                ->update(['status' => DrawResultBatchStatus::Rejected->value]);

            $lockedBatch->forceFill([
                'status' => DrawResultBatchStatus::Published->value,
                'confirmed_by' => $admin->id,
                'confirmed_at' => now(),
            ])->save();

            return $this->applyPublishedToDraw($draw, $lockedBatch);
        });

        $data = $this->snapshot->build();
        $this->hallRealtime->notifyResultPublished($data);
        $this->hallRealtime->notifyStatusChange($data);

        return $draw;
    }

    /** RNG 自动生成且无需审核时在同一事务调用 */
    public function markPublishedInTransaction(Draw $draw, DrawResultBatch $batch): Draw
    {
        $batch->forceFill([
            'status' => DrawResultBatchStatus::Published->value,
            'confirmed_by' => null,
            'confirmed_at' => now(),
        ])->save();

        $draw = $this->applyPublishedToDraw($draw, $batch);

        DB::afterCommit(function (): void {
            $data = app(DrawHallSnapshotBuilder::class)->build();
            app(LotteryHallRealtimeBroadcaster::class)->notifyResultPublished($data);
        });

        return $draw;
    }

    private function applyPublishedToDraw(Draw $draw, DrawResultBatch $batch): Draw
    {
        $cooldownMinutes = LotterySettings::drawCooldownMinutes();
        if ($cooldownMinutes > 0) {
            $draw->forceFill([
                'status' => DrawStatus::Cooldown->value,
                'current_result_version' => (int) $batch->result_version,
                'result_source' => $batch->source_type,
                'cooling_end_time' => now()->addMinutes($cooldownMinutes),
            ])->save();
        } else {
            $draw->forceFill([
                'status' => DrawStatus::Settling->value,
                'current_result_version' => (int) $batch->result_version,
                'result_source' => $batch->source_type,
                'cooling_end_time' => null,
            ])->save();
        }

        return $draw->refresh();
    }

    private function assertDrawReadyToPublish(Draw $draw, DrawResultBatch $batch): void
    {
        if ($draw->status === DrawStatus::Cancelled->value || $draw->status === DrawStatus::Settled->value) {
            throw new \RuntimeException('draw_not_ready_to_publish');
        }

        if ((int) $batch->result_version < (int) $draw->current_result_version) {
            throw new \RuntimeException('batch_result_version_stale');
        }

        $allowed = [
            DrawStatus::Closed->value,
            DrawStatus::Review->value,
            DrawStatus::Cooldown->value,
        ];
        if (! in_array($draw->status, $allowed, true)) {
            throw new \RuntimeException('draw_not_ready_to_publish');
        }

        $this->assertNoActiveSettlementWorkflow($draw);
    }

    /** 存在未完结结算批次时不允许改发布结果，避免派彩与大厅展示号码不一致。 */
    private function assertNoActiveSettlementWorkflow(Draw $draw): void
    {
        $active = SettlementBatch::query()
            ->where('draw_id', $draw->id)
            ->whereIn('status', [
                SettlementBatchStatus::Running->value,
                SettlementBatchStatus::PendingReview->value,
                SettlementBatchStatus::Approved->value,
            ])
            ->exists();

        if ($active) {
            throw new \RuntimeException('draw_settlement_in_progress');
        }
    }
}
