<?php

namespace app\service\api\student;

use app\model\school\SchoolPersonCourseSchedule;
use app\model\school\SchoolStudentCourseUsage;
use app\model\school\SchoolStudentCourses;
use app\model\school\SchoolStudent;
use core\base\BaseApiService;
use think\facade\Db;

/**
 * 学员出勤服务类
 */
class AttendanceService extends BaseApiService
{
    public function __construct()
    {
        parent::__construct();
    }

    /**
     * 学员签到
     * @param array $data
     * @return array
     */
    public function checkinStudent($data)
    {
        $schedule_id = $data['schedule_id'];
        $student_id = $data['student_id'];

        $student = (new SchoolStudent())
            ->where('id', $student_id)
            ->find();
        $resources_id = $student->user_id;
        $person_id = $this->member_id;

        if (empty($schedule_id)) {
            throw new \Exception('参数错误：缺少课程安排ID');
        }

        // 开启事务
        Db::startTrans();
        try {
            // 1. 查询课程安排记录 - 支持学员和客户资源两种类型
            $where = [
                ['schedule_id', '=', $schedule_id],
                ['student_id', '=', $student_id],
                ['resources_id', '=', $resources_id],
                ['deleted_at', '=', 0]
            ];
            
            $schedule = (new SchoolPersonCourseSchedule())
                ->where($where)
                ->find();

            if (!$schedule) {
                throw new \Exception('课程安排记录不存在');
            }

            if ($schedule['status'] == 1) {
                throw new \Exception('该学员已经签到过了');
            }

            // 2. 更新课程安排状态为已上课
            $schedule->save([
                'status' => 1,
                'updated_at' => time()
            ]);

            $student_course_id = $schedule['student_course_id'];
            $person_type = $schedule['person_type'];

            if (!empty($student_course_id)) {
                // 正式学员处理逻辑
                $this->handleFormalStudentCheckin($student_course_id, $student_id, $schedule);
            } elseif ($person_type == 'student' && !empty($student_id)) {
                // 体验课学员处理逻辑
                $this->handleTrialStudentCheckin($student_id, $schedule);
            } elseif ($person_type == 'customer_resource') {
                // 客户资源处理逻辑 - 只更新状态，不扣除课时
                $this->handleCustomerResourceCheckin($schedule);
            } else {
                throw new \Exception('无法确定人员类型，签到失败');
            }

            Db::commit();
            
            return [
                'schedule_id' => $schedule_id,
                'student_id' => $student_id,
                'status' => 1,
                'message' => '签到成功'
            ];

        } catch (\Exception $e) {
            Db::rollback();
            throw new \Exception('签到失败：' . $e->getMessage());
        }
    }

    /**
     * 处理正式学员签到
     * @param int $student_course_id
     * @param int $student_id
     * @param object $schedule
     */
    private function handleFormalStudentCheckin($student_course_id, $student_id, $schedule)
    {
        // 查询学员课程信息
        $studentCourse = (new SchoolStudentCourses())
            ->where('id', $student_course_id)
            ->find();

        if (!$studentCourse) {
            throw new \Exception('学员课程记录不存在');
        }

        $single_session_count = $studentCourse['single_session_count'] ?: 1;
        $total_hours = $studentCourse['total_hours'];
        $gift_hours = $studentCourse['gift_hours'];
        $use_total_hours = $studentCourse['use_total_hours'];
        $use_gift_hours = $studentCourse['use_gift_hours'];

        // 计算课时扣减逻辑
        $remaining_total_hours = $total_hours - $use_total_hours;
        $remaining_gift_hours = $gift_hours - $use_gift_hours;

        $new_use_total_hours = $use_total_hours;
        $new_use_gift_hours = $use_gift_hours;

        if ($remaining_total_hours > 0) {
            // 优先扣减正式课时
            $deduct_from_total = min($remaining_total_hours, $single_session_count);
            $new_use_total_hours += $deduct_from_total;
            
            $remaining_to_deduct = $single_session_count - $deduct_from_total;
            
            if ($remaining_to_deduct > 0 && $remaining_gift_hours > 0) {
                // 剩余部分从赠送课时扣减
                $deduct_from_gift = min($remaining_gift_hours, $remaining_to_deduct);
                $new_use_gift_hours += $deduct_from_gift;
            }
        } else if ($remaining_gift_hours > 0) {
            // 没有正式课时，直接扣减赠送课时
            $deduct_from_gift = min($remaining_gift_hours, $single_session_count);
            $new_use_gift_hours += $deduct_from_gift;
        }

        // 更新学员课程表
        $studentCourse->save([
            'use_total_hours' => $new_use_total_hours,
            'use_gift_hours' => $new_use_gift_hours,
            'updated_at' => time()
        ]);

        // 插入消课记录
        $this->insertUsageRecord($student_course_id, $student_id, $single_session_count, $schedule);
    }

    /**
     * 处理体验课学员签到
     * @param int $student_id
     * @param object $schedule
     */
    private function handleTrialStudentCheckin($student_id, $schedule)
    {
        // 查询学员信息
        $student = (new SchoolStudent())
            ->where('id', $student_id)
            ->find();

        if (!$student) {
            throw new \Exception('学员信息不存在');
        }

        $updateData = [];
        $current_time = time();

        // 更新到校时间逻辑
        if (empty($student['first_come']) || $student['first_come'] == '0000-00-00 00:00:00') {
            $updateData['first_come'] = date('Y-m-d H:i:s', $current_time);
        } else if (empty($student['second_come']) || $student['second_come'] == '0000-00-00 00:00:00') {
            $updateData['second_come'] = date('Y-m-d H:i:s', $current_time);
        }

        // 扣减体验课次数
        $trial_class_count = $student['trial_class_count'] ?: 0;
        if ($trial_class_count > 0) {
            $updateData['trial_class_count'] = $trial_class_count - 1;
        }

        if (!empty($updateData)) {
            $updateData['updated_at'] = date('Y-m-d H:i:s');
            $student->save($updateData);
        }

        // 插入消课记录（体验课也需要记录）
        $this->insertUsageRecord(0, $student_id, 1, $schedule);
    }

    /**
     * 插入消课记录
     * @param int $student_course_id
     * @param int $student_id
     * @param float $used_hours
     * @param object $schedule
     */
    private function insertUsageRecord($student_course_id, $student_id, $used_hours, $schedule)
    {
        // 获取资源ID
        $resource_id = $schedule['resources_id'];

        (new SchoolStudentCourseUsage())->save([
            'student_course_id' => $student_course_id,
            'used_hours' => $used_hours,
            'usage_date' => date('Y-m-d'),
            'student_id' => $student_id,
            'resource_id' => $resource_id,
            'created_at' => time(),
            'updated_at' => time()
        ]);
    }

    /**
     * 学员请假
     * @param array $data
     * @return array
     */
    public function leaveStudent($data)
    {
        $schedule_id = $data['schedule_id'];
        $student_id = $data['student_id'];
        $resources_id = $data['resources_id'] ?? 0;
        $person_id = $data['person_id'];
        $remark = $data['remark'] ?? '';

        if (empty($schedule_id)) {
            throw new \Exception('参数错误：缺少课程安排ID');
        }

        // 查询课程安排记录 - 支持学员和客户资源两种类型
        $where = [
            ['schedule_id', '=', $schedule_id],
            ['person_id', '=', $person_id],
            ['deleted_at', '=', 0]
        ];
        
        // 根据传入的参数决定查询条件
        if (!empty($student_id) && $student_id > 0) {
            // 正式学员
            $where[] = ['student_id', '=', $student_id];
            $where[] = ['person_type', '=', 'student'];
        } elseif (!empty($resources_id) && $resources_id > 0) {
            // 客户资源
            $where[] = ['resources_id', '=', $resources_id];
            $where[] = ['person_type', '=', 'customer_resource'];
        } else {
            throw new \Exception('参数错误：必须提供学员ID或资源ID');
        }
        
        $schedule = (new SchoolPersonCourseSchedule())
            ->where($where)
            ->find();

        if (!$schedule) {
            throw new \Exception('课程安排记录不存在');
        }

        if ($schedule['status'] == 2) {
            throw new \Exception('该学员已经请假了');
        }

        // 更新状态为请假
        $schedule->save([
            'status' => 2,
            'remark' => $remark,
            'updated_at' => time()
        ]);

        return [
            'schedule_id' => $schedule_id,
            'student_id' => $student_id,
            'status' => 2,
            'message' => '请假成功'
        ];
    }

    /**
     * 学员取消
     * @param array $data
     * @return array
     */
    public function cancelStudent($data)
    {
        $schedule_id = $data['schedule_id'];
        $student_id = $data['student_id'];
        $resources_id = $data['resources_id'] ?? 0;
        $person_id = $data['person_id'];
        $cancel_scope = $data['cancel_scope'] ?? 'single'; // single: 单节课, all: 全部课程
        $cancel_reason = $data['cancel_reason'] ?? '';

        if (empty($schedule_id)) {
            throw new \Exception('参数错误：缺少课程安排ID');
        }

        // 开启事务
        Db::startTrans();
        try {
            // 查询课程安排记录 - 支持学员和客户资源两种类型
            $where = [
                ['schedule_id', '=', $schedule_id],
                ['person_id', '=', $person_id],
                ['deleted_at', '=', 0]
            ];
            
            // 根据传入的参数决定查询条件
            if (!empty($student_id) && $student_id > 0) {
                // 正式学员
                $where[] = ['student_id', '=', $student_id];
                $where[] = ['person_type', '=', 'student'];
            } elseif (!empty($resources_id) && $resources_id > 0) {
                // 客户资源
                $where[] = ['resources_id', '=', $resources_id];
                $where[] = ['person_type', '=', 'customer_resource'];
            } else {
                throw new \Exception('参数错误：必须提供学员ID或资源ID');
            }
            
            $schedule = (new SchoolPersonCourseSchedule())
                ->where($where)
                ->find();

            if (!$schedule) {
                throw new \Exception('课程安排记录不存在');
            }

            $schedule_type = $schedule['schedule_type'];
            $course_date = $schedule['course_date'];
            $current_time = time();

            if ($cancel_scope === 'all' && $schedule_type == 1) {
                // 批量取消固定课程
                $cancelCount = (new SchoolPersonCourseSchedule())
                    ->where([
                        ['student_id', '=', $student_id],
                        ['schedule_id', '=', $schedule_id],
                        ['course_date', '>=', $course_date],
                        ['deleted_at', '=', 0]
                    ])
                    ->update([
                        'deleted_at' => $current_time,
                        'cancel_reason' => $cancel_reason,
                        'updated_at' => $current_time
                    ]);

                $message = "成功取消{$cancelCount}节固定课程";
            } else {
                // 单节课取消
                $schedule->save([
                    'deleted_at' => $current_time,
                    'cancel_reason' => $cancel_reason,
                    'updated_at' => $current_time
                ]);

                $message = '成功取消单节课程';
            }

            Db::commit();

            return [
                'schedule_id' => $schedule_id,
                'student_id' => $student_id,
                'cancel_scope' => $cancel_scope,
                'message' => $message
            ];

        } catch (\Exception $e) {
            Db::rollback();
            throw new \Exception('取消失败：' . $e->getMessage());
        }
    }

    /**
     * 处理客户资源签到
     * @param object $schedule
     */
    private function handleCustomerResourceCheckin($schedule)
    {
        // 客户资源签到，需要检查是否为体验课学员并更新相关字段
        $student_id = $schedule['student_id'];
        $current_time = time();
        
        if (!empty($student_id)) {
            // 查询学员信息
            $student = (new SchoolStudent())
                ->where('id', $student_id)
                ->find();

            if ($student) {
                $updateData = [];

                // 更新到校时间逻辑
                if (empty($student['first_come']) || $student['first_come'] == '0000-00-00 00:00:00') {
                    $updateData['first_come'] = date('Y-m-d H:i:s', $current_time);
                } else if (empty($student['second_come']) || $student['second_come'] == '0000-00-00 00:00:00') {
                    $updateData['second_come'] = date('Y-m-d H:i:s', $current_time);
                }

                // 扣减体验课次数
                $trial_class_count = $student['trial_class_count'] ?: 0;
                if ($trial_class_count > 0) {
                    $updateData['trial_class_count'] = $trial_class_count - 1;
                }

                if (!empty($updateData)) {
                    $updateData['updated_at'] = date('Y-m-d H:i:s');
                    $student->save($updateData);
                }

                // 插入消课记录（体验课也需要记录）
                $this->insertUsageRecord(0, $student_id, 1, $schedule);
            }
        }
        
        return true;
    }
}