<?php

namespace app\common\Service\commission;

use app\common\model\commission\Agent as AgentModel;
use app\common\model\commission\Reward as RewardModel;
use app\common\model\commission\Log as LogModel;
use app\common\model\User as UserModel;
use app\common\Enum\AgentType;
use think\Db;

/**
 * 区域代理商分佣服务
 */
class RegionalCommission
{
    protected $commissionOrder;
    protected $orderUser;
    protected $goods;
    protected $config;

    public function __construct($commissionOrder, $goods, $config)
    {
        $this->commissionOrder = $commissionOrder;
        $this->goods = $goods;
        $this->config = $config;
        
        // 获取下单用户信息
        $this->orderUser = UserModel::where('id', $commissionOrder->buyer_id)->find();
    }

    /**
     * 执行区域代理商分佣
     */
    public function executeRegionalCommission()
    {
        if (!$this->orderUser) {
            return false;
        }

        // 获取下单用户的地区信息
        $userArea = $this->getUserArea();
        if (!$userArea) {
            return false;
        }

        // 查找管辖该区域的区域代理商
        $regionalAgents = $this->getRegionalAgents($userArea);
        
        foreach ($regionalAgents as $agent) {
            $this->processRegionalAgent($agent, $userArea);
        }

        return true;
    }

    /**
     * 获取用户地区信息
     */
    protected function getUserArea()
    {
        // 假设用户表有地区字段，或者从用户地址中获取
        // 这里需要根据实际业务逻辑调整
        return [
            'province_id' => $this->orderUser->province_id ?? 0,
            'city_id' => $this->orderUser->city_id ?? 0,
            'district_id' => $this->orderUser->district_id ?? 0
        ];
    }

    /**
     * 获取管辖该区域的区域代理商
     */
    protected function getRegionalAgents($userArea)
    {
        $agents = [];

        // 查找区域代理商：按管辖范围从小到大查找（区 -> 市 -> 省）
        
        // 1. 查找区域级代理商（district类型）
        if ($userArea['district_id'] > 0) {
            $districtAgents = AgentModel::where('agent_type', AgentType::DISTRICT)
                                       ->where('manage_district_id', $userArea['district_id'])
                                       ->where('status', AgentModel::AGENT_STATUS_NORMAL)
                                       ->with(['identity'])
                                       ->select();
            $agents = array_merge($agents, $districtAgents->toArray());
        }

        // 2. 查找市级代理商（city类型），如果还没有区级代理商
        if (empty($agents) && $userArea['city_id'] > 0) {
            $cityAgents = AgentModel::where('agent_type', AgentType::CITY)
                                   ->where('manage_city_id', $userArea['city_id'])
                                   ->where('status', AgentModel::AGENT_STATUS_NORMAL)
                                   ->with(['identity'])
                                   ->select();
            $agents = array_merge($agents, $cityAgents->toArray());
        }

        // 3. 查找省级代理商（province类型），如果还没有市级代理商
        if (empty($agents) && $userArea['province_id'] > 0) {
            $provinceAgents = AgentModel::where('agent_type', AgentType::PROVINCE)
                                       ->where('manage_province_id', $userArea['province_id'])
                                       ->where('status', AgentModel::AGENT_STATUS_NORMAL)
                                       ->with(['identity'])
                                       ->select();
            $agents = array_merge($agents, $provinceAgents->toArray());
        }

        return $agents;
    }

    /**
     * 处理单个区域代理商分佣
     */
    protected function processRegionalAgent($agent, $userArea)
    {
        // 防止重复分佣
        $existingReward = RewardModel::where([
            'commission_order_id' => $this->commissionOrder->id,
            'agent_id' => $agent['user_id'],
            'reward_type' => 'regional'
        ])->find();

        if ($existingReward) {
            return false;
        }

        // 获取区域分佣比例
        $commissionRate = $agent['identity']['regional_commission_rate'] ?? 0;
        if ($commissionRate <= 0) {
            return false;
        }

        // 计算佣金
        $commission = round($this->commissionOrder->amount * $commissionRate / 100, 2);
        if ($commission <= 0) {
            return false;
        }

        // 创建区域分佣记录
        $rewardData = [
            'order_id' => $this->commissionOrder->order_id,
            'order_item_id' => $this->commissionOrder->order_item_id,
            'buyer_id' => $this->commissionOrder->buyer_id,
            'commission_order_id' => $this->commissionOrder->id,
            'agent_id' => $agent['user_id'],
            'type' => 'commission',
            'reward_type' => 'regional', // 区域分佣标识
            'commission' => $commission,
            'original_commission' => $commission,
            'commission_level' => 0, // 区域分佣不按层级
            'agent_level' => $agent['level'],
            'commission_rules' => json_encode([
                'type' => 'regional',
                'rate' => $commissionRate,
                'area' => $userArea,
                'agent_area' => [
                    'province' => $agent['manage_province_id'],
                    'city' => $agent['manage_city_id'], 
                    'district' => $agent['manage_district_id']
                ]
            ]),
            'status' => 0 // 待入账
        ];

        $reward = RewardModel::create($rewardData);

        // 记录日志
        LogModel::add($agent['user_id'], 'reward', [
            'type' => 'regional_commission',
            'reward' => $reward,
            'area' => $userArea
        ], $this->orderUser);

        return $reward;
    }

    /**
     * 检查区域冲突 - 确保同一区域只有一个代理商获得分佣
     */
    protected function checkAreaConflict($agents, $userArea)
    {
        // 按管辖范围精确度排序：区 > 市 > 省
        usort($agents, function($a, $b) {
            $aScore = 0;
            $bScore = 0;
            
            if ($a['manage_district_id'] > 0) $aScore = 3;
            elseif ($a['manage_city_id'] > 0) $aScore = 2;  
            elseif ($a['manage_province_id'] > 0) $aScore = 1;
            
            if ($b['manage_district_id'] > 0) $bScore = 3;
            elseif ($b['manage_city_id'] > 0) $bScore = 2;
            elseif ($b['manage_province_id'] > 0) $bScore = 1;
            
            return $bScore - $aScore; // 降序，精确度高的优先
        });

        // 只返回最精确的代理商
        return array_slice($agents, 0, 1);
    }
}