// ===========================================
// 多班级版班级管理系统 - Go 后端
//
// 开发者: Canglan
// 联系方式: admin@sea-studio.top
// 版权归属: Sea Network Technology Studio
// 许可证: Apache License 2.0
//
// 版权所有 © Sea Network Technology Studio
// ===========================================

package service

import (
	"hz-gitea.sea-studio.top/canglan/SharedClassManager/internal/repository"
)

// StudentService 学生端服务
type StudentService struct {
	studentRepo    *repository.StudentRepo
	conductRepo    *repository.ConductRepo
	attendanceRepo *repository.AttendanceRepo
	semesterRepo   *repository.SemesterRepo
}

// NewStudentService 创建学生端服务
func NewStudentService(
	studentRepo *repository.StudentRepo,
	conductRepo *repository.ConductRepo,
	attendanceRepo *repository.AttendanceRepo,
	semesterRepo *repository.SemesterRepo,
) *StudentService {
	return &StudentService{
		studentRepo:    studentRepo,
		conductRepo:    conductRepo,
		attendanceRepo: attendanceRepo,
		semesterRepo:   semesterRepo,
	}
}

// GetStudentInfo 获取学生个人信息
func (s *StudentService) GetStudentInfo(studentID int) (map[string]interface{}, error) {
	student, err := s.studentRepo.GetByID(studentID)
	if err != nil {
		return nil, err
	}
	return map[string]interface{}{
		"student": student,
	}, nil
}

// GetConductHistory 获取学生操行分历史
func (s *StudentService) GetConductHistory(studentID int, limit, offset int) (map[string]interface{}, error) {
	student, err := s.studentRepo.GetByID(studentID)
	if err != nil {
		return nil, err
	}

	records, err := s.conductRepo.GetStudentRecords(studentID, limit, offset, false, "", "", 0)
	if err != nil {
		return nil, err
	}

	// 扣分项的操作人统一显示为"班主任"
	for i := range records {
		if records[i].PointsChange < 0 {
			name := "班主任"
			records[i].RecorderReal = &name
		}
	}

	return map[string]interface{}{
		"student_id":   studentID,
		"student_name": student.Name,
		"total_points": student.TotalPoints,
		"records":      records,
	}, nil
}

// GetHomeworkStatus 获取学生作业情况
func (s *StudentService) GetHomeworkStatus(studentID int) (map[string]interface{}, error) {
	student, err := s.studentRepo.GetByID(studentID)
	if err != nil {
		return nil, err
	}

	records, err := s.conductRepo.GetStudentRecords(studentID, 1000, 0, false, "", "", 0)
	if err != nil {
		return nil, err
	}

	// 过滤出作业相关记录
	var homeworkRecords []interface{}
	for _, r := range records {
		if r.RelatedType == "homework" {
			homeworkRecords = append(homeworkRecords, r)
		}
	}

	return map[string]interface{}{
		"student_id":   studentID,
		"student_name": student.Name,
		"homework":     homeworkRecords,
	}, nil
}

// GetAttendanceRecords 获取学生考勤记录
func (s *StudentService) GetAttendanceRecords(studentID int, month string) (map[string]interface{}, error) {
	student, err := s.studentRepo.GetByID(studentID)
	if err != nil {
		return nil, err
	}

	records, err := s.attendanceRepo.GetStudentRecords(studentID, month)
	if err != nil {
		return nil, err
	}

	// 统计
	present, absent, late, leave := 0, 0, 0, 0
	for _, r := range records {
		switch r.Status {
		case "present":
			present++
		case "absent":
			absent++
		case "late":
			late++
		case "leave":
			leave++
		}
	}

	return map[string]interface{}{
		"student_id":   studentID,
		"student_name": student.Name,
		"statistics": map[string]interface{}{
			"present": present,
			"absent":  absent,
			"late":    late,
			"leave":   leave,
			"total":   len(records),
		},
		"records": records,
	}, nil
}

// GetRanking 获取排行榜
func (s *StudentService) GetRanking(classID int, limit int) (map[string]interface{}, error) {
	ranking, err := s.studentRepo.GetRanking(classID, limit)
	if err != nil {
		return nil, err
	}
	totalStudents, _ := s.studentRepo.GetTotalCount(classID)

	return map[string]interface{}{
		"ranking":        ranking,
		"total_students": totalStudents,
	}, nil
}

// GetSemesterRecords 获取学生学期归档记录
func (s *StudentService) GetSemesterRecords(studentID int) (map[string]interface{}, error) {
	archives, err := s.semesterRepo.GetArchivesByStudent(studentID)
	if err != nil {
		return nil, err
	}
	return map[string]interface{}{
		"records": archives,
	}, nil
}