import '../core/utils/safe_convert.dart';
import 'attendance.dart';
import 'student.dart';
import 'timetable.dart';

class Announcement {
  final int id;
  final String name;
  final String date;
  final String summary;

  const Announcement({
    required this.id,
    required this.name,
    required this.date,
    required this.summary,
  });

  factory Announcement.fromJson(Map<String, dynamic> json) {
    return Announcement(
      id: SafeConvert.toSafeInt(json['id']),
      name: SafeConvert.toSafeString(json['name']),
      date: SafeConvert.toSafeString(json['date']),
      summary: SafeConvert.toSafeString(json['summary']),
    );
  }
}

class DashboardExam {
  final int id;
  final String name;
  final String state;
  final String? startDate;

  const DashboardExam({
    required this.id,
    required this.name,
    required this.state,
    this.startDate,
  });

  factory DashboardExam.fromJson(Map<String, dynamic> json) {
    return DashboardExam(
      id: SafeConvert.toSafeInt(json['id']),
      name: SafeConvert.toSafeString(json['name']),
      state: SafeConvert.toSafeString(json['state'], 'scheduled'),
      startDate: SafeConvert.toNullableString(json['start_date']),
    );
  }
}

class DashboardResult {
  final int id;
  final NamedRecord? exam;
  final double percentage;
  final String? grade;
  final String status;

  const DashboardResult({
    required this.id,
    this.exam,
    required this.percentage,
    this.grade,
    required this.status,
  });

  factory DashboardResult.fromJson(Map<String, dynamic> json) {
    return DashboardResult(
      id: SafeConvert.toSafeInt(json['id']),
      exam: NamedRecord.fromNullableJson(json['exam']),
      percentage: SafeConvert.toSafeDouble(json['percentage']),
      grade: SafeConvert.toNullableString(json['grade']),
      status: SafeConvert.toSafeString(json['status'], 'pass'),
    );
  }
}

class DashboardStudent {
  final int id;
  final String fullName;
  final NamedRecord? program;

  const DashboardStudent({
    required this.id,
    required this.fullName,
    this.program,
  });

  factory DashboardStudent.fromJson(Map<String, dynamic> json) {
    return DashboardStudent(
      id: SafeConvert.toSafeInt(json['id']),
      fullName: SafeConvert.toSafeString(json['full_name']),
      program: NamedRecord.fromNullableJson(json['program']),
    );
  }
}

class DashboardData {
  final DashboardStudent? student;
  final AttendanceSummary attendance;
  final List<TimetableSlot> todayTimetable;
  final List<DashboardExam> upcomingExams;
  final List<DashboardResult> recentResults;
  final List<Announcement> announcements;

  const DashboardData({
    this.student,
    required this.attendance,
    required this.todayTimetable,
    required this.upcomingExams,
    required this.recentResults,
    required this.announcements,
  });

  factory DashboardData.fromJson(Map<String, dynamic> json) {
    final studentMap = SafeConvert.toNullableMap(json['student']);
    final attendanceMap = SafeConvert.toNullableMap(json['attendance']) ?? {};

    return DashboardData(
      student: studentMap != null ? DashboardStudent.fromJson(studentMap) : null,
      attendance: AttendanceSummary.fromJson(attendanceMap),
      todayTimetable: SafeConvert.toSafeList(
        json['today_timetable'],
        (item) => TimetableSlot.fromJson(SafeConvert.toNullableMap(item) ?? {}),
      ),
      upcomingExams: SafeConvert.toSafeList(
        json['upcoming_exams'],
        (item) => DashboardExam.fromJson(SafeConvert.toNullableMap(item) ?? {}),
      ),
      recentResults: SafeConvert.toSafeList(
        json['recent_results'],
        (item) => DashboardResult.fromJson(SafeConvert.toNullableMap(item) ?? {}),
      ),
      announcements: SafeConvert.toSafeList(
        json['announcements'],
        (item) => Announcement.fromJson(SafeConvert.toNullableMap(item) ?? {}),
      ),
    );
  }
}