<?php

/**
 * 文件功能：赛马进行中实时进度广播事件
 *
 * 跑马过程中每隔1秒广播各马匹当前进度（0~100%），
 * 前端据此实时更新赛道动画。
 *
 * @author  ChatRoom Laravel
 *
 * @version 1.0.0
 */

namespace App\Events;

use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Broadcasting\PresenceChannel;
use Illuminate\Contracts\Broadcasting\ShouldBroadcastNow;
use Illuminate\Foundation\Events\Dispatchable;
use Illuminate\Queue\SerializesModels;

class HorseRaceProgress implements ShouldBroadcastNow
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    /**
     * @param  int  $raceId  场次 ID
     * @param  array<int, int>  $positions  各马匹进度 [horse_id => progress(0~100)]
     * @param  bool  $finished  是否已到终点
     * @param  int|null  $leaderId  当前领跑马匹 ID
     */
    public function __construct(
        public readonly int $raceId,
        public readonly array $positions,
        public readonly bool $finished = false,
        public readonly ?int $leaderId = null,
    ) {}

    /**
     * 广播至房间公共频道。
     *
     * @return array<\Illuminate\Broadcasting\Channel>
     */
    public function broadcastOn(): array
    {
        return [new PresenceChannel('room.1')];
    }

    /**
     * 广播事件名（前端监听 .horse.progress）。
     */
    public function broadcastAs(): string
    {
        return 'horse.progress';
    }

    /**
     * 广播数据。
     *
     * @return array<string, mixed>
     */
    public function broadcastWith(): array
    {
        return [
            'race_id' => $this->raceId,
            'positions' => $this->positions,
            'finished' => $this->finished,
            'leader_id' => $this->leaderId,
        ];
    }
}