<?php

namespace app\common\model\commission;

use think\Model;

/**
 * 分销佣金规则模型
 */
class CommissionRules extends Model
{
    protected $name = 'shop_commission_rules';

    // 佣金类型常量
    const TYPE_RATE = 'rate';   // 比例佣金
    const TYPE_MONEY = 'money'; // 固定金额

    // 状态常量
    const STATUS_DISABLED = 0; // 禁用
    const STATUS_ENABLED = 1;  // 启用

    protected $type = [
        'value' => 'float',
        'created_at' => 'timestamp',
        'updated_at' => 'timestamp'
    ];

    /**
     * 关联商品
     */
    public function goods()
    {
        return $this->belongsTo('CommissionGoods', 'goods_id', 'goods_id');
    }

    /**
     * 计算佣金
     * @param string $amount 结算金额
     * @param int $quantity 商品数量
     * @return string
     */
    public function calculateCommission($amount, $quantity = 1)
    {
        if ($this->type === self::TYPE_RATE) {
            // 比例佣金：金额 * 比例 / 100
            return bcmul(
                bcmul($amount, $this->value, 4),
                '0.01',
                2
            );
        } else {
            // 固定金额：金额 * 数量
            return bcmul($this->value, $quantity, 2);
        }
    }

    /**
     * 获取特定规则
     * @param int $goodsId 商品ID
     * @param int $skuId SKU ID
     * @param int $agentLevel 分销商等级
     * @param int $level 分销层级
     * @return CommissionRules|null
     */
    public static function getRule($goodsId, $skuId, $agentLevel, $level)
    {
        return self::where([
            'goods_id' => $goodsId,
            'sku_id' => $skuId,
            'agent_level' => $agentLevel,
            'level' => $level,
            'status' => self::STATUS_ENABLED
        ])->find();
    }

    /**
     * 批量获取商品规则
     * @param int $goodsId 商品ID
     * @param int $skuId SKU ID，0表示批量规则
     * @return array
     */
    public static function getGoodsRules($goodsId, $skuId = 0)
    {
        $rules = self::where([
            'goods_id' => $goodsId,
            'sku_id' => $skuId,
            'status' => self::STATUS_ENABLED
        ])->order('agent_level asc, level asc')->select();

        $result = [];
        foreach ($rules as $rule) {
            $result[$rule['agent_level']][$rule['level']] = [
                'type' => $rule['type'],
                'value' => $rule['value'],
                'rate' => $rule['type'] === self::TYPE_RATE ? $rule['value'] : '',
                'money' => $rule['type'] === self::TYPE_MONEY ? $rule['value'] : ''
            ];
        }

        return $result;
    }

    /**
     * 批量设置规则
     * @param int $goodsId 商品ID
     * @param int $skuId SKU ID
     * @param array $rulesData 规则数据
     * @return bool
     */
    public static function setGoodsRules($goodsId, $skuId, $rulesData)
    {
        // 删除现有规则
        self::where([
            'goods_id' => $goodsId,
            'sku_id' => $skuId
        ])->delete();

        // 批量插入新规则
        $insertData = [];
        foreach ($rulesData as $agentLevel => $levelRules) {
            foreach ($levelRules as $level => $rule) {
                if (isset($rule['type'], $rule['value']) && bccomp($rule['value'], '0', 4) > 0) {
                    $insertData[] = [
                        'goods_id' => $goodsId,
                        'sku_id' => $skuId,
                        'agent_level' => $agentLevel,
                        'level' => $level,
                        'type' => $rule['type'],
                        'value' => $rule['value'],
                        'status' => self::STATUS_ENABLED
                    ];
                }
            }
        }

        if (!empty($insertData)) {
            return self::insertAll($insertData);
        }

        return true;
    }

    /**
     * 删除商品的所有规则
     * @param int $goodsId 商品ID
     * @return bool
     */
    public static function deleteGoodsRules($goodsId)
    {
        return self::where('goods_id', $goodsId)->delete();
    }

    /**
     * 复制规则到新商品
     * @param int $fromGoodsId 源商品ID
     * @param int $toGoodsId 目标商品ID
     * @return bool
     */
    public static function copyRules($fromGoodsId, $toGoodsId)
    {
        $sourceRules = self::where('goods_id', $fromGoodsId)->select();
        
        if ($sourceRules->isEmpty()) {
            return true;
        }

        $insertData = [];
        foreach ($sourceRules as $rule) {
            $insertData[] = [
                'goods_id' => $toGoodsId,
                'sku_id' => $rule['sku_id'],
                'agent_level' => $rule['agent_level'],
                'level' => $rule['level'],
                'type' => $rule['type'],
                'value' => $rule['value'],
                'status' => $rule['status']
            ];
        }

        return self::insertAll($insertData);
    }
}