syntax = "proto3";

package next_edu_cloud.core_edu.v1;

// CoreEdu service contracts - P3 core teaching domain.
// Covers exam management, homework assignment, grade recording,
// attendance tracking, and class queries.
//
// Total: 9 Service / 40 RPC (P3.13 expanded state per downstream 9-module analysis).
//   - ExamService: 10 RPC (8 original + SaveExamDraft + RecordExamViolation)
//   - HomeworkService: 5 RPC
//   - GradeService: 7 RPC (6 original + GetReportCard)
//   - ClassService: 4 RPC
//   - AttendanceService: 4 RPC
//   - ScheduleService: 1 RPC (GetScheduleByStudent)
//   - LeaveRequestService: 3 RPC
//   - DashboardService: 2 RPC
//   - AdminService: 4 RPC (aggregation stubs)
// Event contracts live in events.proto under next_edu_cloud.events.v1.
//
// Status naming (ISSUE-003-ai08 arbitration, scheme A):
//   ExamStatus: draft / published / in_progress / grading / graded / archived / cancelled
//   HomeworkStatus: assigned / submitted / graded
//   SubmissionStatus: not_submitted / submitted / graded
//   AttendanceStatus: present / absent / late / leave
//   LeaveRequestStatus: pending / approved / rejected / cancelled

service ExamService {
  rpc CreateExam(CreateExamRequest) returns (CreateExamResponse);
  rpc GetExam(GetExamRequest) returns (Exam);
  rpc ListExamsByClass(ListExamsByClassRequest) returns (ListExamsResponse);
  rpc UpdateExam(UpdateExamRequest) returns (UpdateExamResponse);
  rpc DeleteExam(DeleteExamRequest) returns (DeleteExamResponse);
  rpc PublishExam(PublishExamRequest) returns (PublishExamResponse);
  rpc SubmitExam(SubmitExamRequest) returns (SubmitExamResponse);
  rpc GradeExam(GradeExamRequest) returns (GradeExamResponse);
  rpc SaveExamDraft(SaveExamDraftRequest) returns (SaveExamDraftResponse);
  rpc RecordExamViolation(RecordExamViolationRequest) returns (RecordExamViolationResponse);
}

service HomeworkService {
  rpc AssignHomework(AssignHomeworkRequest) returns (AssignHomeworkResponse);
  rpc GetHomework(GetHomeworkRequest) returns (Homework);
  rpc ListHomeworkByClass(ListHomeworkByClassRequest) returns (ListHomeworkResponse);
  rpc SubmitHomework(SubmitHomeworkRequest) returns (SubmitHomeworkResponse);
  rpc GradeHomework(GradeHomeworkRequest) returns (GradeHomeworkResponse);
}

service GradeService {
  rpc RecordGrade(RecordGradeRequest) returns (RecordGradeResponse);
  rpc GetGrade(GetGradeRequest) returns (Grade);
  rpc ListGradesByStudent(ListGradesByStudentRequest) returns (ListGradesResponse);
  rpc ListGradesByExam(ListGradesByExamRequest) returns (ListGradesResponse);
  rpc ListGradesByHomework(ListGradesByHomeworkRequest) returns (ListGradesResponse);
  rpc UpdateGrade(UpdateGradeRequest) returns (UpdateGradeResponse);
  rpc GetReportCard(GetReportCardRequest) returns (ReportCard);
}

service ClassService {
  rpc GetClass(GetClassRequest) returns (ClassInfo);
  rpc GetClassesByTeacher(GetClassesByTeacherRequest) returns (GetClassesByTeacherResponse);
  rpc BatchGetClasses(BatchGetClassesRequest) returns (BatchGetClassesResponse);
  rpc ListStudentsByClass(ListStudentsByClassRequest) returns (ListStudentsByClassResponse);
}

service AttendanceService {
  rpc RecordAttendance(RecordAttendanceRequest) returns (RecordAttendanceResponse);
  rpc GetAttendance(GetAttendanceRequest) returns (Attendance);
  rpc ListAttendanceByStudent(ListAttendanceByStudentRequest) returns (ListAttendanceResponse);
  rpc ListAttendanceByClass(ListAttendanceByClassRequest) returns (ListAttendanceResponse);
}

service ScheduleService {
  rpc GetScheduleByStudent(GetScheduleByStudentRequest) returns (GetScheduleByStudentResponse);
}

service LeaveRequestService {
  rpc ListLeaveRequestsByStudent(ListLeaveRequestsByStudentRequest) returns (ListLeaveRequestsResponse);
  rpc CreateLeaveRequest(CreateLeaveRequestRequest) returns (CreateLeaveRequestResponse);
  rpc CancelLeaveRequest(CancelLeaveRequestRequest) returns (CancelLeaveRequestResponse);
}

service DashboardService {
  rpc GetDashboard(GetDashboardRequest) returns (DashboardData);
  rpc GetClassPerformance(GetClassPerformanceRequest) returns (ClassPerformance);
}

service AdminService {
  rpc ListSchools(ListSchoolsRequest) returns (ListSchoolsResponse);
  rpc ListGradeLevels(ListGradeLevelsRequest) returns (ListGradeLevelsResponse);
  rpc ListDepartments(ListDepartmentsRequest) returns (ListDepartmentsResponse);
  rpc ListAcademicYears(ListAcademicYearsRequest) returns (ListAcademicYearsResponse);
}

// ----------------------------------------------------------------------------
// Exam domain
// ----------------------------------------------------------------------------

message Exam {
  string id = 1;
  string class_id = 2;
  string subject_id = 3;
  string title = 4;
  string description = 5;
  string exam_date = 6; // ISO 8601
  int32 duration = 7; // seconds
  string total_score = 8; // decimal as string
  string status = 9;
  string status_changed_at = 10;
  string status_changed_by = 11;
  string school_id = 12;
  string created_by = 13;
  string archived_at = 14;
  string created_at = 15;
  string updated_at = 16;
}

message ExamQuestion {
  string id = 1;
  string exam_id = 2;
  string question_id = 3;
  int32 order = 4;
  string score = 5;
  string question_type = 6;
}

message ExamSubmission {
  string id = 1;
  string exam_id = 2;
  string student_id = 3;
  string status = 4;
  string submitted_at = 5;
  string graded_at = 6;
  string graded_by = 7;
  string total_score = 8;
}

message CreateExamRequest {
  string class_id = 1;
  string subject_id = 2;
  string title = 3;
  string description = 4;
  string exam_date = 5;
  int32 duration = 6;
  string total_score = 7;
  string school_id = 8;
  string created_by = 9;
}

message CreateExamResponse {
  string id = 1;
}

message GetExamRequest {
  string id = 1;
}

message ListExamsByClassRequest {
  string class_id = 1;
}

message ListExamsResponse {
  repeated Exam exams = 1;
}

message UpdateExamRequest {
  string id = 1;
  string title = 2;
  string description = 3;
  string exam_date = 4;
  int32 duration = 5;
  string total_score = 6;
  string status = 7;
}

message UpdateExamResponse {
  bool success = 1;
}

message DeleteExamRequest {
  string id = 1;
}

message DeleteExamResponse {
  bool success = 1;
}

message PublishExamRequest {
  string id = 1;
  string published_by = 2;
}

message PublishExamResponse {
  bool success = 1;
}

message SubmitExamRequest {
  string exam_id = 1;
  string student_id = 2;
  repeated AnswerInput answers = 3;
}

message AnswerInput {
  string question_id = 1;
  string answer = 2;
}

message SubmitExamResponse {
  string submission_id = 1;
}

message GradeExamRequest {
  string exam_id = 1;
  string submission_id = 2;
  repeated ScoreInput scores = 3;
  string graded_by = 4;
}

message ScoreInput {
  string question_id = 1;
  string score = 2;
  string teacher_comment = 3;
}

message GradeExamResponse {
  bool success = 1;
  string total_score = 2;
}

// ----------------------------------------------------------------------------
// Homework domain
// ----------------------------------------------------------------------------

message Homework {
  string id = 1;
  string class_id = 2;
  string subject_id = 3;
  string title = 4;
  string description = 5;
  string due_date = 6;
  int32 grace_period = 7;
  string status = 8;
  string school_id = 9;
  string created_by = 10;
  string created_at = 11;
  string updated_at = 12;
}

message HomeworkSubmission {
  string id = 1;
  string homework_id = 2;
  string student_id = 3;
  string status = 4;
  string submitted_at = 5;
  string graded_at = 6;
  string graded_by = 7;
  string total_score = 8;
  string feedback = 9;
}

message AssignHomeworkRequest {
  string class_id = 1;
  string subject_id = 2;
  string title = 3;
  string description = 4;
  string due_date = 5;
  int32 grace_period = 6;
  string school_id = 7;
  string created_by = 8;
}

message AssignHomeworkResponse {
  string id = 1;
}

message GetHomeworkRequest {
  string id = 1;
}

message ListHomeworkByClassRequest {
  string class_id = 1;
}

message ListHomeworkResponse {
  repeated Homework homework = 1;
}

message SubmitHomeworkRequest {
  string homework_id = 1;
  string student_id = 2;
  repeated AnswerInput answers = 3;
}

message SubmitHomeworkResponse {
  string submission_id = 1;
}

message GradeHomeworkRequest {
  string homework_id = 1;
  string submission_id = 2;
  repeated ScoreInput scores = 3;
  string feedback = 4;
  string graded_by = 5;
}

message GradeHomeworkResponse {
  bool success = 1;
  string total_score = 2;
}

// ----------------------------------------------------------------------------
// Grade domain
// ----------------------------------------------------------------------------

message Grade {
  string id = 1;
  string student_id = 2;
  string exam_id = 3;
  string homework_id = 4;
  string score = 5;
  string total_score = 6;
  string feedback = 7;
  string graded_by = 8;
  string school_id = 9;
  string idempotency_key = 10;
  string created_at = 11;
  string updated_at = 12;
}

message RecordGradeRequest {
  string student_id = 1;
  string exam_id = 2;
  string homework_id = 3;
  string score = 4;
  string total_score = 5;
  string feedback = 6;
  string graded_by = 7;
  string school_id = 8;
  string idempotency_key = 9;
}

message RecordGradeResponse {
  string id = 1;
}

message GetGradeRequest {
  string id = 1;
}

message ListGradesByStudentRequest {
  string student_id = 1;
}

message ListGradesByExamRequest {
  string exam_id = 1;
}

message ListGradesByHomeworkRequest {
  string homework_id = 1;
}

message ListGradesResponse {
  repeated Grade grades = 1;
}

message UpdateGradeRequest {
  string id = 1;
  string score = 2;
  string feedback = 3;
  string updated_by = 4;
}

message UpdateGradeResponse {
  bool success = 1;
}

// ----------------------------------------------------------------------------
// Class domain (merged from classes service per ISSUE-006 decision #1)
// ----------------------------------------------------------------------------

message ClassInfo {
  string id = 1;
  string name = 2;
  string grade_id = 3;
  string head_teacher_id = 4;
  string description = 5;
  string created_at = 6;
  string updated_at = 7;
}

message StudentInfo {
  string id = 1;
  string name = 2;
  string class_id = 3;
}

message GetClassRequest {
  string id = 1;
}

message GetClassesByTeacherRequest {
  string teacher_id = 1;
}

message GetClassesByTeacherResponse {
  repeated ClassInfo classes = 1;
}

message BatchGetClassesRequest {
  repeated string ids = 1;
}

message BatchGetClassesResponse {
  repeated ClassInfo classes = 1;
}

message ListStudentsByClassRequest {
  string class_id = 1;
}

message ListStudentsByClassResponse {
  repeated StudentInfo students = 1;
}

// ----------------------------------------------------------------------------
// Attendance domain
// ----------------------------------------------------------------------------

message Attendance {
  string id = 1;
  string schedule_id = 2;
  string student_id = 3;
  string status = 4;
  string remark = 5;
  string recorded_by = 6;
  string school_id = 7;
  string created_at = 8;
  string updated_at = 9;
}

message RecordAttendanceRequest {
  string schedule_id = 1;
  string student_id = 2;
  string status = 3;
  string remark = 4;
  string recorded_by = 5;
  string school_id = 6;
}

message RecordAttendanceResponse {
  string id = 1;
}

message GetAttendanceRequest {
  string id = 1;
}

message ListAttendanceByStudentRequest {
  string student_id = 1;
}

message ListAttendanceByClassRequest {
  string class_id = 1;
}

message ListAttendanceResponse {
  repeated Attendance attendance = 1;
}

// ----------------------------------------------------------------------------
// Exam domain extensions (P3.13)
// ----------------------------------------------------------------------------

message SaveExamDraftRequest {
  string exam_id = 1;
  string student_id = 2;
  repeated AnswerInput answers = 3;
}

message SaveExamDraftResponse {
  string draft_id = 1;
}

message RecordExamViolationRequest {
  string exam_id = 1;
  string student_id = 2;
  string violation_type = 3; // tab_switch / window_blur / copy_paste / fullscreen_exit / browser_devtools
  string detail = 4;
  int32 severity = 5; // 1=info, 2=warning, 3=critical
}

message RecordExamViolationResponse {
  string violation_id = 1;
}

// ----------------------------------------------------------------------------
// Grade domain extensions (P3.13)
// ----------------------------------------------------------------------------

message GetReportCardRequest {
  string student_id = 1;
  string term_id = 2; // optional: filter by academic term
}

message ReportCard {
  string student_id = 1;
  string term_id = 2;
  repeated ReportCardEntry entries = 3;
  string overall_grade = 4;
  string class_rank = 5;
  string created_at = 6;
}

message ReportCardEntry {
  string subject_id = 1;
  string subject_name = 2;
  string exam_score = 3;
  string exam_total = 4;
  string homework_score = 5;
  string homework_total = 6;
  string final_score = 7;
  string grade_level = 8; // A / B / C / D / F
  string teacher_comment = 9;
}

// ----------------------------------------------------------------------------
// Schedule domain extensions (P3.13)
// ----------------------------------------------------------------------------

message GetScheduleByStudentRequest {
  string student_id = 1;
  string week_start = 2; // ISO 8601 date, optional
}

message GetScheduleByStudentResponse {
  repeated ScheduleSlotInfo slots = 1;
}

message ScheduleSlotInfo {
  string id = 1;
  string course_id = 2;
  string course_name = 3;
  string teacher_id = 4;
  string class_id = 5;
  string room_id = 6;
  string start_time = 7; // ISO 8601
  string end_time = 8; // ISO 8601
  string subject_id = 9;
}

// ----------------------------------------------------------------------------
// LeaveRequest domain (P3.13)
// ----------------------------------------------------------------------------

message LeaveRequest {
  string id = 1;
  string student_id = 2;
  string class_id = 3;
  string leave_type = 4; // sick / personal / family / activity / other
  string start_date = 5; // ISO 8601
  string end_date = 6; // ISO 8601
  string reason = 7;
  string status = 8; // pending / approved / rejected / cancelled
  string submitted_by = 9;
  string reviewed_by = 10;
  string review_comment = 11;
  string school_id = 12;
  string created_at = 13;
  string updated_at = 14;
}

message ListLeaveRequestsByStudentRequest {
  string student_id = 1;
  string status = 2; // optional filter
}

message ListLeaveRequestsResponse {
  repeated LeaveRequest leave_requests = 1;
}

message CreateLeaveRequestRequest {
  string student_id = 1;
  string class_id = 2;
  string leave_type = 3;
  string start_date = 4;
  string end_date = 5;
  string reason = 6;
  string submitted_by = 7;
  string school_id = 8;
}

message CreateLeaveRequestResponse {
  string id = 1;
}

message CancelLeaveRequestRequest {
  string id = 1;
  string cancelled_by = 2;
}

message CancelLeaveRequestResponse {
  bool success = 1;
}

// ----------------------------------------------------------------------------
// Dashboard domain (P3.13)
// ----------------------------------------------------------------------------

message GetDashboardRequest {
  string teacher_id = 1;
}

message DashboardData {
  string teacher_id = 1;
  int32 total_classes = 2;
  int32 total_students = 3;
  int32 pending_homework = 4;
  int32 upcoming_exams = 5;
  int32 ungraded_submissions = 6;
  repeated DashboardClassCard classes = 7;
  repeated DashboardExamCard upcoming_exam_list = 8;
  string generated_at = 9;
}

message DashboardClassCard {
  string class_id = 1;
  string class_name = 2;
  int32 student_count = 3;
}

message DashboardExamCard {
  string exam_id = 1;
  string title = 2;
  string exam_date = 3;
  string class_id = 4;
  string class_name = 5;
}

message GetClassPerformanceRequest {
  string class_id = 1;
  string subject_id = 2; // optional
}

message ClassPerformance {
  string class_id = 1;
  string class_name = 2;
  int32 student_count = 3;
  string average_score = 4;
  string highest_score = 5;
  string lowest_score = 6;
  string median_score = 7;
  repeated ClassPerformanceSubject subjects = 8;
  string generated_at = 9;
}

message ClassPerformanceSubject {
  string subject_id = 1;
  string subject_name = 2;
  string average_score = 3;
  int32 student_count = 4;
}

// ----------------------------------------------------------------------------
// Admin aggregation domain (P3.13 stubs)
// ----------------------------------------------------------------------------

message ListSchoolsRequest {
  // no params - returns all schools (admin scope)
}

message ListSchoolsResponse {
  repeated SchoolInfo schools = 1;
}

message SchoolInfo {
  string id = 1;
  string name = 2;
  string address = 3;
  string principal_id = 4;
  string created_at = 5;
}

message ListGradeLevelsRequest {
  string school_id = 1;
}

message ListGradeLevelsResponse {
  repeated GradeLevelInfo grade_levels = 1;
}

message GradeLevelInfo {
  string id = 1;
  string name = 2; // 如 "7年级"
  string school_id = 3;
  int32 order = 4;
}

message ListDepartmentsRequest {
  string school_id = 1;
}

message ListDepartmentsResponse {
  repeated DepartmentInfo departments = 1;
}

message DepartmentInfo {
  string id = 1;
  string name = 2;
  string school_id = 3;
  string head_id = 4;
  string created_at = 5;
}

message ListAcademicYearsRequest {
  string school_id = 1; // optional
}

message ListAcademicYearsResponse {
  repeated AcademicYearInfo academic_years = 1;
}

message AcademicYearInfo {
  string id = 1;
  string name = 2; // 如 "2025-2026 第一学期"
  string school_id = 3;
  string start_date = 4;
  string end_date = 5;
  bool is_current = 6;
}