<?php

namespace App\Module\GameItems\Models;

use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use UCore\ModelCore;

/**
 * 物品产出限制
 *
 * field start
 * @property   int  $id  记录ID，主键
 * @property   int  $item_id  物品ID，外键关联kku_item_items表
 * @property   int  $limit_type  限制类型（1:全局总量, 2:单个用户, 3:单日全局, 4:单日用户）
 * @property   int  $max_quantity  最大产出数量
 * @property   int  $current_quantity  当前已产出数量（全局限制时使用）
 * @property   int  $reset_type  重置类型（0:不重置, 1:每日, 2:每周, 3:每月）
 * @property   string  $last_reset_time  上次重置时间
 * @property   object|array  $related_items  关联物品ID列表，这些物品共享同一个限制额度
 * @property   \Carbon\Carbon  $created_at  创建时间
 * @property   \Carbon\Carbon  $updated_at  更新时间
 * field end
 */
class ItemOutputLimit extends ModelCore
{
    /**
     * 与模型关联的表名
     *
     * @var string
     */
    protected $table = 'item_output_limits';

    // attrlist start
    protected $fillable = [
        'id',
        'item_id',
        'limit_type',
        'max_quantity',
        'current_quantity',
        'reset_type',
        'last_reset_time',
        'related_items',
    ];
    // attrlist end


    /**
     * 应该被转换为日期的属性
     *
     * @var array
     */
    protected $dates = [
        'reset_time',
        'created_at',
        'updated_at',
    ];

    /**
     * 应该被转换为原生类型的属性
     *
     * @var array
     */
    protected $casts = [
        'max_quantity' => 'integer',
        'period_type' => 'integer',
        'period_value' => 'integer',
        'is_active' => 'boolean',
    ];

    /**
     * 限制类型常量
     */
    const LIMIT_TYPE_GLOBAL = 1;    // 全局限制
    const LIMIT_TYPE_USER = 2;      // 用户限制
    const LIMIT_TYPE_DAILY = 3;     // 每日限制
    const LIMIT_TYPE_WEEKLY = 4;    // 每周限制
    const LIMIT_TYPE_MONTHLY = 5;   // 每月限制

    /**
     * 获取关联的物品
     *
     * @return BelongsTo
     */
    public function item(): BelongsTo
    {
        return $this->belongsTo(Item::class, 'item_id');
    }

    /**
     * 获取用户产出限制计数
     *
     * @return HasMany
     */
    public function userCounters(): HasMany
    {
        return $this->hasMany(ItemUserOutputCounter::class, 'limit_id');
    }

    /**
     * 检查是否达到全局限制
     *
     * @return bool
     */
    public function isGlobalLimitReached(): bool
    {
        if ($this->limit_type != self::LIMIT_TYPE_GLOBAL) {
            return false;
        }

        $totalCount = ItemUserOutputCounter::where('limit_id', $this->id)
            ->sum('current_count');

        return $totalCount >= $this->max_quantity;
    }

    /**
     * 检查用户是否达到限制
     *
     * @param int $userId 用户ID
     * @return bool
     */
    public function isUserLimitReached(int $userId): bool
    {
        if ($this->limit_type == self::LIMIT_TYPE_GLOBAL) {
            return $this->isGlobalLimitReached();
        }

        $counter = ItemUserOutputCounter::where('limit_id', $this->id)
            ->where('user_id', $userId)
            ->first();

        if (!$counter) {
            return false;
        }

        return $counter->current_count >= $this->max_quantity;
    }

    /**
     * 增加计数
     *
     * @param int $userId 用户ID
     * @param int $count 增加的数量
     * @return bool
     */
    public function incrementCount(int $userId, int $count = 1): bool
    {
        $counter = ItemUserOutputCounter::firstOrCreate(
            [
                'limit_id' => $this->id,
                'user_id' => $userId,
            ],
            [
                'current_count' => 0,
                'last_reset_time' => now(),
            ]
        );

        // 检查是否需要重置计数
        if ($this->shouldResetCounter($counter)) {
            $counter->current_count = 0;
            $counter->last_reset_time = now();
        }

        $counter->current_count += $count;
        return $counter->save();
    }

    /**
     * 检查是否应该重置计数器
     *
     * @param ItemUserOutputCounter $counter 计数器
     * @return bool
     */
    protected function shouldResetCounter(ItemUserOutputCounter $counter): bool
    {
        if (empty($counter->last_reset_time)) {
            return true;
        }

        switch ($this->limit_type) {
            case self::LIMIT_TYPE_DAILY:
                return $counter->last_reset_time->diffInDays(now()) >= 1;
            case self::LIMIT_TYPE_WEEKLY:
                return $counter->last_reset_time->diffInWeeks(now()) >= 1;
            case self::LIMIT_TYPE_MONTHLY:
                return $counter->last_reset_time->diffInMonths(now()) >= 1;
            default:
                return false;
        }
    }
}