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: 5 Service / 27 RPC (P3 target state per president-final-rulings §2.5).
// 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

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);
}

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);
}

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);
}

// ----------------------------------------------------------------------------
// 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;
}