<?php

namespace app\common\Service\commission;

use app\common\model\commission\Apply as ApplyModel;
use app\common\model\commission\Identity as IdentityModel;
use app\common\model\commission\Agent as AgentModel;
use app\common\model\Area;
use app\common\Service\ShopConfigService;
use app\common\Enum\AgentType;
use think\Db;
use think\Exception;

class AgentApply
{
    /**
     * 获取可用的代理商身份列表
     */
    public function getIdentityList()
    {
        return IdentityModel::getEnabledList();
    }

    /**
     * 提交代理商申请
     */
    public function submitApply($userId, $data)
    {
        // 验证用户是否已经有申请记录
        $existApply = ApplyModel::where('user_id', $userId)
                                ->where('status', 'in', ['pending', 'approved'])
                                ->find();
        
        if ($existApply) {
            if ($existApply->status == 'approved') {
                throw new Exception('您已经是代理商，无需重复申请');
            } else {
                throw new Exception('您已有待审核的申请，请等待审核结果');
            }
        }

        // 验证身份是否存在
        $identity = IdentityModel::where('id', $data['agent_identity_id'])
                                 ->where('status', IdentityModel::STATUS_ENABLED)
                                 ->find();
        if (!$identity) {
            throw new Exception('选择的代理商身份不存在或已禁用');
        }

        // 验证地区信息
        $this->validateArea($data);

        // 根据申请类型验证必要字段
        $this->validateApplyData($data);

        return Db::transaction(function () use ($userId, $data, $identity) {
            // 创建申请记录
            $apply = new ApplyModel();
            $apply->user_id = $userId;
            $apply->apply_type = $data['apply_type'];
            $apply->agent_identity_id = $data['agent_identity_id'];
            $apply->agent_type = $identity->agent_type; // 从身份配置获取代理商类型
            $apply->status = ApplyModel::STATUS_PENDING; // 设置初始状态为待审核
            
            // 地区信息 - 根据代理商类型设置需要的地区字段
            $requiredFields = AgentType::getRequiredAreaFields($identity->agent_type);
            
            if (in_array('province_id', $requiredFields)) {
                $apply->province_id = $data['province_id'] ?? null;
                $apply->province_name = $data['province_name'] ?? '';
            }
            
            if (in_array('city_id', $requiredFields)) {
                $apply->city_id = $data['city_id'] ?? null;
                $apply->city_name = $data['city_name'] ?? '';
            }
            
            if (in_array('district_id', $requiredFields)) {
                $apply->district_id = $data['district_id'] ?? null;
                $apply->district_name = $data['district_name'] ?? '';
            }

            // 根据申请类型填充对应字段
            if ($data['apply_type'] == ApplyModel::APPLY_TYPE_PERSONAL) {
                $apply->real_name = $data['real_name'];
                $apply->id_card = $data['id_card'];
                $apply->id_card_front = $data['id_card_front'];
                $apply->id_card_back = $data['id_card_back'];
                $apply->mobile = $data['mobile'];
            } else {
                $apply->company_name = $data['company_name'];
                $apply->legal_person = $data['legal_person'];
                $apply->legal_mobile = $data['legal_mobile'];
                $apply->legal_id_card = $data['legal_id_card'];
                $apply->legal_id_front = $data['legal_id_front'];
                $apply->legal_id_back = $data['legal_id_back'];
                $apply->business_license = $data['business_license'];
            }

            $apply->save();

            // 检查是否需要审核
            $needCheck = ShopConfigService::getConfigField('shop.commission.agent_apply_check');
            
            if (!$needCheck) {
                // 不需要审核，直接通过
                $this->approveApply($apply);
            }
            return $apply;
        });
    }

    /**
     * 验证地区信息
     */
    private function validateArea($data)
    {
        // 获取代理商身份信息
        $identity = IdentityModel::where('id', $data['agent_identity_id'])
                                 ->where('status', IdentityModel::STATUS_ENABLED)
                                 ->find();
        if (!$identity) {
            throw new Exception('代理商身份不存在');
        }

        // 根据代理商类型获取需要的地区字段
        $requiredFields = AgentType::getRequiredAreaFields($identity->agent_type);
        
        if (empty($requiredFields)) {
            // 普通代理商不需要地区信息
            return;
        }

        // 验证必需的地区字段
        foreach ($requiredFields as $field) {
            if (empty($data[$field])) {
                $fieldTexts = [
                    'province_id' => '省份',
                    'city_id' => '城市', 
                    'district_id' => '区域'
                ];
                throw new Exception($fieldTexts[$field] . '不能为空');
            }
        }

        // 验证地区ID的有效性和层级关系
        $this->validateAreaIds($data, $requiredFields);
    }

    /**
     * 验证地区ID的有效性和层级关系
     */
    private function validateAreaIds($data, $requiredFields)
    {
        // 验证省份
        if (in_array('province_id', $requiredFields) && !empty($data['province_id'])) {
            $province = Area::where('id', $data['province_id'])->where('level', 1)->find();
            if (!$province) {
                throw new Exception('选择的省份不存在');
            }
        }

        // 验证城市
        if (in_array('city_id', $requiredFields) && !empty($data['city_id'])) {
            $city = Area::where('id', $data['city_id'])->where('level', 2)->find();
            if (!$city) {
                throw new Exception('选择的城市不存在');
            }
            
            // 验证城市是否属于选择的省份
            if (!empty($data['province_id']) && $city->pid != $data['province_id']) {
                throw new Exception('选择的城市不属于该省份');
            }
        }

        // 验证区域
        if (in_array('district_id', $requiredFields) && !empty($data['district_id'])) {
            $district = Area::where('id', $data['district_id'])->where('level', 3)->find();
            if (!$district) {
                throw new Exception('选择的区域不存在');
            }
            
            // 验证区域是否属于选择的城市
            if (!empty($data['city_id']) && $district->pid != $data['city_id']) {
                throw new Exception('选择的区域不属于该城市');
            }
        }
    }

    /**
     * 验证申请数据
     */
    private function validateApplyData($data)
    {
        if ($data['apply_type'] == ApplyModel::APPLY_TYPE_PERSONAL) {
            $requiredFields = ['real_name', 'id_card', 'id_card_front', 'id_card_back', 'mobile'];
            foreach ($requiredFields as $field) {
                if (empty($data[$field])) {
                    throw new Exception('个人申请信息不完整');
                }
            }
            
            // 验证身份证格式
            if (!$this->validateIdCard($data['id_card'])) {
                throw new Exception('身份证号格式不正确');
            }
        } else {
            $requiredFields = ['company_name', 'legal_person', 'legal_mobile', 'legal_id_card', 'legal_id_front', 'legal_id_back', 'business_license'];
            foreach ($requiredFields as $field) {
                if (empty($data[$field])) {
                    throw new Exception('企业申请信息不完整');
                }
            }
            
            // 验证法人身份证格式
            if (!$this->validateIdCard($data['legal_id_card'])) {
                throw new Exception('法人身份证号格式不正确');
            }
        }
    }

    /**
     * 验证身份证号格式
     */
    private function validateIdCard($idCard)
    {
        return preg_match('/^[1-9]\d{5}(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$/', $idCard);
    }

    /**
     * 审核通过申请
     */
    public function approveApply(ApplyModel $apply, $adminId = null)
    {
        return Db::transaction(function () use ($apply, $adminId) {
            // 更新申请状态
            $apply->status = ApplyModel::STATUS_APPROVED;
            $apply->admin_id = $adminId;
            $apply->audit_time = time();
            $apply->save();

            // 创建代理商记录
            $this->createAgentFromApply($apply);

            return $apply;
        });
    }

    /**
     * 审核拒绝申请
     */
    public function rejectApply(ApplyModel $apply, $reason, $adminId = null)
    {
        $apply->status = ApplyModel::STATUS_REJECTED;
        $apply->reject_reason = $reason;
        $apply->admin_id = $adminId;
        $apply->audit_time = time();
        return $apply->save();
    }

    /**
     * 根据申请信息创建代理商
     */
    private function createAgentFromApply(ApplyModel $apply)
    {
        // 检查用户是否已经是分销商
        $existAgent = AgentModel::where('user_id', $apply->user_id)->find();
        if ($existAgent) {
            return $existAgent;
        }

        // 获取身份信息
        $identity = IdentityModel::where('id', $apply->agent_identity_id)->find();

        // 创建分销商记录
        $agent = new AgentModel();
        $agent->user_id = $apply->user_id;
        $agent->level = 1; // 默认等级
        $agent->agent_type = $apply->agent_type;
        $agent->status = AgentModel::AGENT_STATUS_NORMAL;
        $agent->become_time = time();

        // 如果是区域代理商（省级、市级、区域级），设置管辖区域
        if (AgentType::isRegionalAgent($apply->agent_type)) {
            // 根据代理商类型设置对应的管辖区域
            if ($apply->agent_type == AgentType::PROVINCE && !empty($apply->province_id)) {
                $agent->manage_province_id = $apply->province_id;
            } elseif ($apply->agent_type == AgentType::CITY) {
                if (!empty($apply->province_id)) {
                    $agent->manage_province_id = $apply->province_id;
                }
                if (!empty($apply->city_id)) {
                    $agent->manage_city_id = $apply->city_id;
                }
            } elseif ($apply->agent_type == AgentType::DISTRICT) {
                if (!empty($apply->province_id)) {
                    $agent->manage_province_id = $apply->province_id;
                }
                if (!empty($apply->city_id)) {
                    $agent->manage_city_id = $apply->city_id;
                }
                if (!empty($apply->district_id)) {
                    $agent->manage_district_id = $apply->district_id;
                }
            }
        }

        $agent->save();

        return $agent;
    }

    /**
     * 获取用户的申请记录
     */
    public function getUserApply($userId)
    {
        return ApplyModel::where('user_id', $userId)
                         ->with(['identity', 'province', 'city', 'district'])
                         ->order('id desc')
                         ->find();
    }
}