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

class ResultLine {
  final NamedRecord? subject;
  final double maxMarks;
  final double passMarks;
  final double obtainedMarks;
  final double percentage;
  final String? grade;
  final String status;

  const ResultLine({
    this.subject,
    required this.maxMarks,
    required this.passMarks,
    required this.obtainedMarks,
    required this.percentage,
    this.grade,
    required this.status,
  });

  factory ResultLine.fromJson(Map<String, dynamic> json) {
    return ResultLine(
      subject: NamedRecord.fromNullableJson(json['subject']),
      maxMarks: SafeConvert.toSafeDouble(json['max_marks']),
      passMarks: SafeConvert.toSafeDouble(json['pass_marks']),
      obtainedMarks: SafeConvert.toSafeDouble(json['obtained_marks']),
      percentage: SafeConvert.toSafeDouble(json['percentage']),
      grade: SafeConvert.toNullableString(json['grade']),
      status: SafeConvert.toSafeString(json['status'], 'pass'),
    );
  }
}

class ExamResult {
  final int id;
  final NamedRecord? exam;
  final double totalMaxMarks;
  final double totalObtainedMarks;
  final double percentage;
  final String? grade;
  final String status;
  final String? publishedDate;
  final List<ResultLine> lines;

  const ExamResult({
    required this.id,
    this.exam,
    required this.totalMaxMarks,
    required this.totalObtainedMarks,
    required this.percentage,
    this.grade,
    required this.status,
    this.publishedDate,
    required this.lines,
  });

  factory ExamResult.fromJson(Map<String, dynamic> json) {
    return ExamResult(
      id: SafeConvert.toSafeInt(json['id']),
      exam: NamedRecord.fromNullableJson(json['exam']),
      totalMaxMarks: SafeConvert.toSafeDouble(json['total_max_marks']),
      totalObtainedMarks: SafeConvert.toSafeDouble(json['total_obtained_marks']),
      percentage: SafeConvert.toSafeDouble(json['percentage']),
      grade: SafeConvert.toNullableString(json['grade']),
      status: SafeConvert.toSafeString(json['status'], 'pass'),
      publishedDate: SafeConvert.toNullableString(json['published_date']),
      lines: SafeConvert.toSafeList(
        json['lines'],
        (item) => ResultLine.fromJson(SafeConvert.toNullableMap(item) ?? {}),
      ),
    );
  }
}