<?php

namespace App\Module\Mex\Models;

use App\Module\GameItems\Models\Item;
use App\Module\Mex\Enums\PriceAdjustmentType;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use UCore\ModelCore;

/**
 * 农贸市场价格调整记录模型
 *
 * field start 
 * @property  int  $id  调整记录ID，主键
 * @property  int  $price_config_id  价格配置ID，关联mex_price_configs表
 * @property  int  $item_id  商品ID，关联物品表
 * @property  int  $admin_user_id  操作管理员用户ID
 * @property  \App\Module\Mex\Enums\PriceAdjustmentType  $adjustment_type  调整类型：MIN_PRICE最低价，MAX_PRICE最高价，PROTECTION_THRESHOLD保护阈值，STATUS启用状态，BATCH批量调整
 * @property  float  $old_min_price  调整前最低价
 * @property  float  $new_min_price  调整后最低价
 * @property  float  $old_max_price  调整前最高价
 * @property  float  $new_max_price  调整后最高价
 * @property  int  $old_protection_threshold  调整前保护阈值
 * @property  int  $new_protection_threshold  调整后保护阈值
 * @property  bool  $old_is_enabled  调整前启用状态
 * @property  bool  $new_is_enabled  调整后启用状态
 * @property  string  $adjustment_reason  调整原因
 * @property  string  $market_impact_note  市场影响说明
 * @property  \Carbon\Carbon  $created_at  调整时间
 * field end
 */
class MexPriceAdjustment extends ModelCore
{
    protected $table = 'mex_price_adjustments';

    // 禁用updated_at字段的自动管理，因为表中只有created_at字段
    public const UPDATED_AT = null;

    protected $fillable = [
        'price_config_id',
        'item_id',
        'admin_user_id',
        'adjustment_type',
        'old_min_price',
        'new_min_price',
        'old_max_price',
        'new_max_price',
        'old_protection_threshold',
        'new_protection_threshold',
        'old_is_enabled',
        'new_is_enabled',
        'adjustment_reason',
        'market_impact_note',
    ];

    protected $casts = [
        'price_config_id' => 'integer',
        'item_id' => 'integer',
        'admin_user_id' => 'integer',
        'adjustment_type' => PriceAdjustmentType::class,
        'old_min_price' => 'decimal:5',
        'new_min_price' => 'decimal:5',
        'old_max_price' => 'decimal:5',
        'new_max_price' => 'decimal:5',
        'old_protection_threshold' => 'integer',
        'new_protection_threshold' => 'integer',
        'old_is_enabled' => 'boolean',
        'new_is_enabled' => 'boolean',
    ];

    /**
     * 获取关联的价格配置
     */
    public function priceConfig(): BelongsTo
    {
        return $this->belongsTo(MexPriceConfig::class, 'price_config_id');
    }

    /**
     * 获取关联的商品信息
     */
    public function item(): BelongsTo
    {
        return $this->belongsTo(Item::class, 'item_id');
    }

    /**
     * 获取价格变化摘要
     */
    public function getPriceChangeSummaryAttribute(): string
    {
        $changes = [];
        
        if ($this->old_min_price !== $this->new_min_price) {
            $changes[] = "最低价: {$this->old_min_price} → {$this->new_min_price}";
        }
        
        if ($this->old_max_price !== $this->new_max_price) {
            $changes[] = "最高价: {$this->old_max_price} → {$this->new_max_price}";
        }
        
        if ($this->old_protection_threshold !== $this->new_protection_threshold) {
            $changes[] = "保护阈值: {$this->old_protection_threshold} → {$this->new_protection_threshold}";
        }
        
        if ($this->old_is_enabled !== $this->new_is_enabled) {
            $oldStatus = $this->old_is_enabled ? '启用' : '禁用';
            $newStatus = $this->new_is_enabled ? '启用' : '禁用';
            $changes[] = "状态: {$oldStatus} → {$newStatus}";
        }
        
        return implode('; ', $changes);
    }
}