<?php

namespace App\Module\GameItems\Models;

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

/**
 * 物品分解规则
 *
 * field start 
 * @property  int  $id  规则ID，主键
 * @property  int  $item_id  物品ID，外键关联kku_item_items表
 * @property  int  $category_id  分类ID，外键关联kku_item_categories表
 * @property  int  $min_rarity  最小适用稀有度
 * @property  int  $max_rarity  最大适用稀有度
 * @property  int  $priority  规则优先级
 * @property  bool  $is_active  是否激活（0:否, 1:是）
 * @property  \Carbon\Carbon  $created_at  创建时间
 * @property  \Carbon\Carbon  $updated_at  更新时间
 * field end
 */
class ItemDismantleRule extends ModelCore
{
    /**
     * 与模型关联的表名
     *
     * @var string
     */
    protected $table = 'item_dismantle_rules';

    // attrlist start 
    protected $fillable = [
        'id',
        'item_id',
        'category_id',
        'min_rarity',
        'max_rarity',
        'priority',
        'is_active',
    ];
    // attrlist end


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

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

    /**
     * 获取关联的分类（如果有）
     *
     * @return BelongsTo
     */
    public function category(): BelongsTo
    {
        return $this->belongsTo(ItemCategory::class, 'category_id');
    }

    /**
     * 获取分解结果
     *
     * @return HasMany
     */
    public function results(): HasMany
    {
        return $this->hasMany(ItemDismantleResult::class, 'rule_id');
    }

    /**
     * 获取分解日志
     *
     * @return HasMany
     */
    public function dismantleLogs(): HasMany
    {
        return $this->hasMany(ItemDismantleLog::class, 'rule_id');
    }

    /**
     * 计算分解返还的金币
     *
     * @param int $itemPrice 物品价格
     * @return int
     */
    public function calculateCoinReturn(int $itemPrice): int
    {
        if ($this->coin_return_rate <= 0) {
            return 0;
        }

        return (int)($itemPrice * $this->coin_return_rate);
    }

    /**
     * 获取分解结果
     *
     * @return array
     */
    public function getDismantleResults(): array
    {
        $results = [];
        $dismantleResults = $this->results()->with('resultItem')->get();

        foreach ($dismantleResults as $result) {
            // 根据概率决定是否获得该物品
            if (mt_rand(1, 10000) <= $result->chance * 100) {
                // 计算数量
                $quantity = $result->min_quantity;
                if ($result->max_quantity > $result->min_quantity) {
                    $quantity = mt_rand($result->min_quantity, $result->max_quantity);
                }

                if ($quantity > 0) {
                    $results[] = [
                        'item_id' => $result->result_item_id,
                        'item_name' => $result->resultItem->name,
                        'quantity' => $quantity,
                    ];
                }
            }
        }

        return $results;
    }
}