<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class ActivityDay extends Model
{
    protected $fillable = [
        'activity_id',
        'activity_date',
        'day_quota',
        'booked_count',
        'opens_at',
        'closes_at',
    ];

    protected $casts = [
        'activity_date' => 'date',
        'opens_at' => 'datetime',
        'closes_at' => 'datetime',
        'day_quota' => 'integer',
        'booked_count' => 'integer',
    ];

    public function activity(): BelongsTo
    {
        return $this->belongsTo(Activity::class);
    }

    /**
     * 当前时刻是否处于预约开放窗口且仍有余量（与 H5 预约接口判定一致）。
     */
    public function isCurrentlyBookable(): bool
    {
        $available = max(0, (int) $this->day_quota - (int) $this->booked_count);
        $closesAt = $this->closes_at ?: $this->opens_at->copy()->endOfDay();
        $now = now();
        $isOpenWindow = $this->opens_at->lte($now) && $closesAt->gte($now);

        return $isOpenWindow && $available > 0;
    }
}