<?php
// +----------------------------------------------------------------------
// | Niucloud-admin 企业快速开发的多应用管理平台
// +----------------------------------------------------------------------
// | 官方网址：https://www.niucloud.com
// +----------------------------------------------------------------------
// | niucloud团队 版权所有 开源版本可自由商用
// +----------------------------------------------------------------------
// | Author: Niucloud Team
// +----------------------------------------------------------------------

namespace app\service\api\parent;

use app\model\customer_resources\CustomerResources;
use core\base\BaseService;
use core\exception\CommonException;
use core\util\TokenAuth;
use think\facade\Db;

/**
 * 家长端服务类
 */
class ParentService extends BaseService
{
    /**
     * 获取当前登录用户信息
     * @return array
     * @throws \Exception
     */
    private function getCurrentUser()
    {
        $token = request()->header('token');
        if (!$token) {
            throw new CommonException('未登录');
        }

        try {
            $tokenData = TokenAuth::parseToken($token, 'api');
            if (empty($tokenData)) {
                throw new CommonException('Token无效');
            }
        } catch (\Exception $e) {
            throw new CommonException('Token解析失败: ' . $e->getMessage());
        }

        // 获取客户资源信息
        $customerResources = new CustomerResources();
        $userInfo = $customerResources->where('id', $tokenData['user_id'])->find();
        
        if (!$userInfo) {
            throw new CommonException('用户信息不存在');
        }

        return $userInfo;
    }

    /**
     * 获取家长下的孩子列表
     * @return array
     * @throws \Exception
     */
    public function getChildrenList()
    {
        $currentUser = $this->getCurrentUser();
        
        // 查询该家长下的所有孩子
        $children = Db::table('school_student')
                     ->alias('s')
                     ->leftJoin('school_campus ca', 's.campus_id = ca.id')
                     ->leftJoin('school_class cl', 's.class_id = cl.id')
                     ->where('s.user_id', $currentUser['id'])
                     ->where('s.deleted_at', 0)
                     ->field('s.*, ca.campus_name, cl.class_name')
                     ->select()
                     ->toArray();

        // 计算每个孩子的课程统计信息
        foreach ($children as &$child) {
            // 计算年龄
            if ($child['birthday']) {
                $birthDate = new \DateTime($child['birthday']);
                $today = new \DateTime();
                $age = $today->diff($birthDate)->y;
                $child['age'] = $age;
            }

            // 获取课程统计信息
            $courseStats = $this->getChildCourseStats($child['id']);
            $child = array_merge($child, $courseStats);
        }

        return [
            'data' => $children,
            'parent_info' => [
                'id' => $currentUser['id'],
                'name' => $currentUser['name'],
                'phone_number' => $currentUser['phone_number']
            ]
        ];
    }

    /**
     * 获取孩子的课程统计信息
     * @param int $childId
     * @return array
     */
    private function getChildCourseStats($childId)
    {
        // 获取该学员的所有课程
        $courses = Db::table('school_student_courses')
                    ->where('student_id', $childId)
                    ->select()
                    ->toArray();
        
        $totalCourses = 0;
        $remainingCourses = 0;
        $completedCourses = 0;

        foreach ($courses as $course) {
            $totalCourses += $course['course_hours'] ?? 0;
            $remainingCourses += $course['remaining_hours'] ?? 0;
        }

        $completedCourses = $totalCourses - $remainingCourses;

        // 计算出勤率
        $attendanceRate = 0;
        if ($completedCourses > 0) {
            $presentCount = Db::table('school_student_course_usage')
                             ->where('student_id', $childId)
                             ->where('status', 'present')
                             ->count();
            $attendanceRate = round(($presentCount / $completedCourses) * 100, 1);
        }

        return [
            'total_courses' => $totalCourses,
            'remaining_courses' => $remainingCourses,
            'completed_courses' => $completedCourses,
            'attendance_rate' => $attendanceRate
        ];
    }

    /**
     * 获取指定孩子的详细信息
     * @param int $childId
     * @return array
     * @throws \Exception
     */
    public function getChildInfo($childId)
    {
        $currentUser = $this->getCurrentUser();
        
        $student = new Student();
        $childInfo = $student->alias('s')
                            ->leftJoin('school_campus ca', 's.campus_id = ca.id')
                            ->leftJoin('school_classes cl', 's.class_id = cl.id')
                            ->where('s.id', $childId)
                            ->where('s.user_id', $currentUser['id'])
                            ->where('s.deleted_at', 0)
                            ->field('s.*, ca.name as campus_name, cl.name as class_name')
                            ->find();

        if (!$childInfo) {
            throw new CommonException('孩子信息不存在');
        }

        // 计算年龄
        if ($childInfo['birthday']) {
            $birthDate = new \DateTime($childInfo['birthday']);
            $today = new \DateTime();
            $age = $today->diff($birthDate)->y;
            $childInfo['age'] = $age;
        }

        // 获取课程统计信息
        $courseStats = $this->getChildCourseStats($childId);
        $childInfo = array_merge($childInfo->toArray(), $courseStats);

        return $childInfo;
    }

    /**
     * 新增孩子信息
     * @param array $data
     * @return array
     * @throws \Exception
     */
    public function addChild($data)
    {
        $currentUser = $this->getCurrentUser();
        
        // 计算年龄
        if ($data['birthday']) {
            $birthDate = new \DateTime($data['birthday']);
            $today = new \DateTime();
            $age = $today->diff($birthDate)->y;
            $data['age'] = $age;
        }

        $childData = [
            'name' => $data['name'],
            'gender' => $data['gender'],
            'age' => $data['age'],
            'birthday' => $data['birthday'],
            'user_id' => $currentUser['id'],
            'campus_id' => 0, // 默认未分配校区
            'class_id' => 0,  // 默认未分配班级
            'note' => $data['remark'] ?? '',
            'status' => 1,    // 默认正常状态
            'created_at' => date('Y-m-d H:i:s'),
            'updated_at' => date('Y-m-d H:i:s')
        ];

        $result = Db::table('school_student')->insertGetId($childData);
        
        if (!$result) {
            throw new CommonException('新增孩子信息失败');
        }

        return [
            'id' => $result,
            'name' => $data['name'],
            'message' => '新增孩子信息成功'
        ];
    }

    /**
     * 更新孩子信息
     * @param array $data
     * @return array
     * @throws \Exception
     */
    public function updateChildInfo($data)
    {
        $currentUser = $this->getCurrentUser();
        
        $student = new Student();
        $childInfo = $student->where('id', $data['child_id'])
                            ->where('user_id', $currentUser['id'])
                            ->where('deleted_at', 0)
                            ->find();

        if (!$childInfo) {
            throw new CommonException('孩子信息不存在');
        }

        // 计算年龄
        if ($data['birthday']) {
            $birthDate = new \DateTime($data['birthday']);
            $today = new \DateTime();
            $age = $today->diff($birthDate)->y;
            $data['age'] = $age;
        }

        $updateData = [
            'name' => $data['name'],
            'gender' => $data['gender'],
            'age' => $data['age'],
            'birthday' => $data['birthday'],
            'note' => $data['remark'] ?? '',
            'updated_at' => date('Y-m-d H:i:s')
        ];

        $result = $childInfo->save($updateData);
        
        if (!$result) {
            throw new CommonException('更新孩子信息失败');
        }

        return [
            'message' => '更新孩子信息成功'
        ];
    }

    /**
     * 获取指定孩子的课程信息
     * @param int $childId
     * @return array
     * @throws \Exception
     */
    public function getChildCourses($childId)
    {
        $currentUser = $this->getCurrentUser();
        
        // 验证孩子是否属于当前用户
        $student = new Student();
        $childInfo = $student->where('id', $childId)
                            ->where('user_id', $currentUser['id'])
                            ->where('deleted_at', 0)
                            ->find();

        if (!$childInfo) {
            throw new CommonException('孩子信息不存在');
        }

        // 获取课程信息
        $studentCourses = new StudentCourses();
        $courses = $studentCourses->alias('sc')
                                 ->leftJoin('school_course c', 'sc.course_id = c.id')
                                 ->where('sc.student_id', $childId)
                                 ->field('sc.*, c.name as course_name, c.description')
                                 ->select()
                                 ->toArray();

        return [
            'data' => $courses,
            'child_info' => [
                'id' => $childInfo['id'],
                'name' => $childInfo['name']
            ]
        ];
    }

    /**
     * 获取指定孩子的订单信息
     * @param int $childId
     * @return array
     * @throws \Exception
     */
    public function getChildOrders($childId)
    {
        $currentUser = $this->getCurrentUser();
        
        // 验证孩子是否属于当前用户
        $student = new Student();
        $childInfo = $student->where('id', $childId)
                            ->where('user_id', $currentUser['id'])
                            ->where('deleted_at', 0)
                            ->find();

        if (!$childInfo) {
            throw new CommonException('孩子信息不存在');
        }

        // 获取订单信息
        $orderTable = new OrderTable();
        $orders = $orderTable->where('customer_resources_id', $currentUser['id'])
                            ->where('student_id', $childId)
                            ->order('created_at DESC')
                            ->select()
                            ->toArray();

        return [
            'data' => $orders,
            'child_info' => [
                'id' => $childInfo['id'],
                'name' => $childInfo['name']
            ]
        ];
    }

    /**
     * 获取指定孩子的服务记录
     * @param int $childId
     * @return array
     * @throws \Exception
     */
    public function getChildServices($childId)
    {
        $currentUser = $this->getCurrentUser();
        
        // 验证孩子是否属于当前用户
        $student = new Student();
        $childInfo = $student->where('id', $childId)
                            ->where('user_id', $currentUser['id'])
                            ->where('deleted_at', 0)
                            ->find();

        if (!$childInfo) {
            throw new CommonException('孩子信息不存在');
        }

        // TODO: 这里需要根据实际的服务记录表结构来实现
        // 暂时返回空数据
        return [
            'data' => [],
            'child_info' => [
                'id' => $childInfo['id'],
                'name' => $childInfo['name']
            ]
        ];
    }

    /**
     * 获取指定孩子的消息记录
     * @param int $childId
     * @return array
     * @throws \Exception
     */
    public function getChildMessages($childId)
    {
        $currentUser = $this->getCurrentUser();
        
        // 验证孩子是否属于当前用户
        $student = new Student();
        $childInfo = $student->where('id', $childId)
                            ->where('user_id', $currentUser['id'])
                            ->where('deleted_at', 0)
                            ->find();

        if (!$childInfo) {
            throw new CommonException('孩子信息不存在');
        }

        // 获取消息记录
        $chatMessages = new ChatMessages();
        $messages = $chatMessages->where('to_customer_id', $currentUser['id'])
                                ->order('created_at DESC')
                                ->limit(50)
                                ->select()
                                ->toArray();

        return [
            'data' => $messages,
            'child_info' => [
                'id' => $childInfo['id'],
                'name' => $childInfo['name']
            ]
        ];
    }

    /**
     * 获取指定孩子的合同信息
     * @param int $childId
     * @return array
     * @throws \Exception
     */
    public function getChildContracts($childId)
    {
        $currentUser = $this->getCurrentUser();
        
        // 验证孩子是否属于当前用户
        $student = new Student();
        $childInfo = $student->where('id', $childId)
                            ->where('user_id', $currentUser['id'])
                            ->where('deleted_at', 0)
                            ->find();

        if (!$childInfo) {
            throw new CommonException('孩子信息不存在');
        }

        // TODO: 这里需要根据实际的合同表结构来实现
        // 暂时返回空数据
        return [
            'data' => [],
            'child_info' => [
                'id' => $childInfo['id'],
                'name' => $childInfo['name']
            ]
        ];
    }
}