<?php

/**
 * 文件功能：赛马结算队列任务
 *
 * 跑马结束后触发，按彩池赔率结算所有下注记录，
 * 中奖者获得按注池比例计算的赔付，失败者金币已在下注时扣除。
 * 结算完成后广播结果并发公屏公告。
 *
 * @author  ChatRoom Laravel
 *
 * @version 1.0.0
 */

namespace App\Jobs;

use App\Enums\CurrencySource;
use App\Events\HorseRaceSettled;
use App\Events\MessageSent;
use App\Models\GameConfig;
use App\Models\HorseBet;
use App\Models\HorseRace;
use App\Services\ChatStateService;
use App\Services\UserCurrencyService;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Queue\Queueable;
use Illuminate\Support\Facades\DB;

class CloseHorseRaceJob implements ShouldQueue
{
    use Queueable;

    /**
     * 最大重试次数。
     */
    public int $tries = 3;

    /**
     * @param  HorseRace  $race  要结算的场次
     */
    public function __construct(
        public readonly HorseRace $race,
    ) {}

    /**
     * 执行结算逻辑。
     */
    public function handle(
        UserCurrencyService $currency,
        ChatStateService $chatState,
    ): void {
        $race = $this->race->fresh();

        // 防止重复结算
        if (! $race || $race->status !== 'running') {
            return;
        }

        // CAS 改状态为 settled
        $updated = HorseRace::query()
            ->where('id', $race->id)
            ->where('status', 'running')
            ->update(['status' => 'settled', 'settled_at' => now()]);

        if (! $updated) {
            return;
        }

        $race->refresh();

        $config = GameConfig::forGame('horse_racing')?->params ?? [];
        $houseTake = (int) ($config['house_take_percent'] ?? 5);
        $winnerId = (int) $race->winner_horse_id;

        // 按马匹统计各匹下注金额
        $horsePools = HorseBet::query()
            ->where('race_id', $race->id)
            ->groupBy('horse_id')
            ->selectRaw('horse_id, SUM(amount) as pool')
            ->pluck('pool', 'horse_id')
            ->toArray();

        $totalPool = array_sum($horsePools);
        $winnerPool = (int) ($horsePools[$winnerId] ?? 0);
        $netPool = (int) ($totalPool * (1 - $houseTake / 100));

        // 结算：遍历所有下注记录
        $bets = HorseBet::query()
            ->where('race_id', $race->id)
            ->where('status', 'pending')
            ->with('user')
            ->get();

        $totalPayout = 0;

        DB::transaction(function () use ($bets, $winnerId, $netPool, $winnerPool, $currency, &$totalPayout) {
            foreach ($bets as $bet) {
                if ((int) $bet->horse_id !== $winnerId) {
                    // 未中奖（本金已在下注时扣除）
                    $bet->update(['status' => 'lost', 'payout' => 0]);

                    continue;
                }

                // 中奖：按注额比例分配净注池
                if ($winnerPool > 0) {
                    $payout = (int) round($netPool * ($bet->amount / $winnerPool));
                } else {
                    $payout = 0;
                }

                $bet->update(['status' => 'won', 'payout' => $payout]);

                if ($payout > 0 && $bet->user) {
                    $currency->change(
                        $bet->user,
                        'gold',
                        $payout,
                        CurrencySource::HORSE_WIN,
                        "赛马 #{$this->race->id} 「{$bet->horse_id}号马」中奖",
                    );
                }

                $totalPayout += $payout;
            }
        });

        // 公屏公告
        $this->pushResultMessage($race, $chatState, $totalPayout);

        // 广播结算事件
        broadcast(new HorseRaceSettled($race));
    }

    /**
     * 向公屏发送赛果系统消息。
     */
    private function pushResultMessage(HorseRace $race, ChatStateService $chatState, int $totalPayout): void
    {
        // 找出胜利马匹名称
        $horses = $race->horses ?? [];
        $winnerName = '未知';
        foreach ($horses as $horse) {
            if (($horse['id'] ?? 0) === (int) $race->winner_horse_id) {
                $winnerName = ($horse['emoji'] ?? '').($horse['name'] ?? '');
                break;
            }
        }

        $payoutText = $totalPayout > 0
            ? '共派发 💰'.number_format($totalPayout).' 金币'
            : '本场无人获奖';

        $content = "🏆 【赛马】第 #{$race->id} 场结束！冠军：{$winnerName}！{$payoutText}。";

        $msg = [
            'id' => $chatState->nextMessageId(1),
            'room_id' => 1,
            'from_user' => '系统传音',
            'to_user' => '大家',
            'content' => $content,
            'is_secret' => false,
            'font_color' => '#f59e0b',
            'action' => '大声宣告',
            'sent_at' => now()->toDateTimeString(),
        ];
        $chatState->pushMessage(1, $msg);
        broadcast(new MessageSent(1, $msg));
        SaveMessageJob::dispatch($msg);
    }
}
