<?php

namespace App\Module\Ulogic\Models;

use App\Module\AppMessage\Enums\APP_MESSAGE_STATUS;
use App\Module\AppMessage\Enums\APP_MESSAGE_TYPE;
use App\Module\AppMessage\Enums\APP_SENDER_TYPE;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasMany;

/**
 * 应用消息模型
 * field start 
 * field end
 *
 * @property-read \Illuminate\Database\Eloquent\Collection|AppMessageRecipient[] $recipients 消息接收者列表
 */
class AppMessage extends Model
{
    /**
     * 数据表名称
     *
     * @var string
     */
    protected $table = 'app_messages';

    // attrlist start 
    protected $fillable = [
    ];
    // attrlist end

    /**
     * 可批量赋值的属性
     *
     * @var array
     */
    protected $fillable = [
        'type',      // 消息类型
        'title',     // 消息标题
        'content',   // 消息内容
        'data',      // 消息附加数据
        'sender_id', // 发送者ID
        'sender_type', // 发送者类型
        'status'     // 消息状态
    ];

    /**
     * 属性类型转换
     *
     * @var array
     */
    protected $casts = [
        'data' => 'array',
        'status' => APP_MESSAGE_STATUS::class,
        'type' => APP_MESSAGE_TYPE::class,
        'sender_type' => APP_SENDER_TYPE::class
    ];

    /**
     * 获取消息接收者列表
     *
     * 一条消息可以有多个接收者，这里定义了一对多关系
     *
     * @return HasMany
     */
    public function recipients(): HasMany
    {
        return $this->hasMany(AppMessageRecipient::class, 'message_id');
    }

    /**
     * 获取指定用户的未读消息数量
     *
     * @param int $userId 用户ID
     * @return int 未读消息数量
     */
    public static function getUnreadCount(int $userId): int
    {
        return static::whereHas('recipients', function ($query) use ($userId) {
            $query->where('user_id', $userId)
                ->where('is_read', false);
        })->count();
    }

    /**
     * 将消息标记为已读
     *
     * @param int $messageId 消息ID
     * @param int $userId 用户ID
     * @return bool 是否标记成功
     */
    public static function markAsRead(int $messageId, int $userId): bool
    {
        return static::whereHas('recipients', function ($query) use ($messageId, $userId) {
            $query->where('message_id', $messageId)
                ->where('user_id', $userId);
        })->update([
            'is_read' => true,
            'read_at' => now()
        ]);
    }
}