<?php

namespace app\common\model\lottery;

use think\Model;
use traits\model\SoftDelete;

/**
 * 抽奖活动模型
 */
class LotteryActivity extends Model
{
    use SoftDelete;

    // 表名
    protected $name = 'shop_lottery_activity';
    
    // 开启自动写入时间戳字段
    protected $autoWriteTimestamp = 'int';
    // 定义时间戳字段名
    protected $createTime = 'createtime';
    protected $updateTime = 'updatetime';
    protected $deleteTime = 'deletetime';

    // 追加属性
    protected $append = [
        'status_text',
        'lottery_type_text',
        'user_limit_type_text'
    ];

    // 状态常量
    const STATUS_DRAFT = 0;      // 草稿
    const STATUS_RUNNING = 1;    // 进行中
    const STATUS_ENDED = 2;      // 已结束
    const STATUS_PAUSED = 3;     // 已暂停

    // 开奖方式常量
    const LOTTERY_TYPE_INSTANT = 1;  // 即抽即中
    const LOTTERY_TYPE_TIME = 2;     // 按时间开奖
    const LOTTERY_TYPE_PEOPLE = 3;   // 按人数开奖

    // 用户群体类型常量
    const USER_LIMIT_ALL = 1;        // 全部会员
    const USER_LIMIT_LEVEL = 2;      // 会员等级
    const USER_LIMIT_TAG = 3;        // 会员标签

    /**
     * 关联奖品
     */
    public function prizes()
    {
        return $this->hasMany('LotteryPrize', 'activity_id');
    }

    /**
     * 关联参与条件
     */
    public function conditions()
    {
        return $this->hasMany('LotteryCondition', 'activity_id');
    }

    /**
     * 关联抽奖记录
     */
    public function drawRecords()
    {
        return $this->hasMany('LotteryDrawRecord', 'activity_id');
    }

    /**
     * 关联中奖记录
     */
    public function winRecords()
    {
        return $this->hasMany('LotteryWinRecord', 'activity_id');
    }

    /**
     * 关联用户机会
     */
    public function userChances()
    {
        return $this->hasMany('LotteryUserChance', 'activity_id');
    }

    /**
     * 获取状态文本
     */
    public function getStatusTextAttr($value, $data)
    {
        $status = [
            self::STATUS_DRAFT => '草稿',
            self::STATUS_RUNNING => '进行中',
            self::STATUS_ENDED => '已结束',
            self::STATUS_PAUSED => '已暂停'
        ];
        return isset($status[$data['status']]) ? $status[$data['status']] : '未知';
    }

    /**
     * 获取开奖方式文本
     */
    public function getLotteryTypeTextAttr($value, $data)
    {
        $types = [
            self::LOTTERY_TYPE_INSTANT => '即抽即中',
            self::LOTTERY_TYPE_TIME => '按时间开奖',
            self::LOTTERY_TYPE_PEOPLE => '按人数开奖'
        ];
        return isset($types[$data['lottery_type']]) ? $types[$data['lottery_type']] : '未知';
    }

    /**
     * 获取用户群体类型文本
     */
    public function getUserLimitTypeTextAttr($value, $data)
    {
        $types = [
            self::USER_LIMIT_ALL => '全部会员',
            self::USER_LIMIT_LEVEL => '会员等级',
            self::USER_LIMIT_TAG => '会员标签'
        ];
        return isset($types[$data['user_limit_type']]) ? $types[$data['user_limit_type']] : '未知';
    }

    /**
     * 获取用户限制值（自动解析JSON）
     */
    public function getUserLimitValueAttr($value, $data)
    {
        return $value ? json_decode($value, true) : [];
    }

    /**
     * 设置用户限制值（自动转换JSON）
     */
    public function setUserLimitValueAttr($value)
    {
        return is_array($value) ? json_encode($value) : $value;
    }

    /**
     * 检查活动是否正在进行
     */
    public function isRunning()
    {
        $now = time();
        return $this->status == self::STATUS_RUNNING 
               && $this->start_time <= $now 
               && $this->end_time >= $now;
    }

    /**
     * 检查活动是否已结束
     */
    public function isEnded()
    {
        $now = time();
        return $this->status == self::STATUS_ENDED 
               || $this->end_time < $now;
    }

    /**
     * 检查是否在抽奖时间内
     */
    public function isInDrawTime()
    {
        if (!$this->draw_time_enable) {
            return true;
        }
        
        $currentTime = date('H:i');
        return $currentTime >= $this->draw_time_start 
               && $currentTime <= $this->draw_time_end;
    }

    /**
     * 获取正在进行的活动
     */
    public static function getRunningActivities()
    {
        $now = time();
        return static::where('status', self::STATUS_RUNNING)
                     ->where('start_time', '<=', $now)
                     ->where('end_time', '>=', $now)
                     ->select();
    }
}