import 'dart:convert';

/// Directorate Model (المظلة المركزية: مديرية الثقافة العسكرية)
class DirectorateOverview {
  final String code;
  final String name;
  final String commanderName;
  final int totalSchools;
  final int totalStudents;
  final int totalTeachers;
  final double annualContractValue;
  final int recordedLessonsMonth;
  final double complianceRate;
  final double aiAverageScore;
  final int activeUnifiedExams;

  DirectorateOverview({
    required this.code,
    required this.name,
    required this.commanderName,
    required this.totalSchools,
    required this.totalStudents,
    required this.totalTeachers,
    required this.annualContractValue,
    required this.recordedLessonsMonth,
    required this.complianceRate,
    required this.aiAverageScore,
    required this.activeUnifiedExams,
  });

  factory DirectorateOverview.fromJson(Map<String, dynamic> json) {
    return DirectorateOverview(
      code: json['code'] ?? 'MC-JOR',
      name: json['name'] ?? 'مديرية التربية والتعليم والثقافة العسكرية',
      commanderName: json['commander_name'] ?? 'مدير التعليم والثقافة العسكرية',
      totalSchools: json['total_schools'] ?? 43,
      totalStudents: json['total_students'] ?? 19350,
      totalTeachers: json['total_teachers'] ?? 812,
      annualContractValue: (json['annual_contract_value'] as num?)?.toDouble() ?? 20000.0,
      recordedLessonsMonth: json['recorded_lessons_month'] ?? 1420,
      complianceRate: (json['compliance_rate'] as num?)?.toDouble() ?? 94.5,
      aiAverageScore: (json['ai_average_score'] as num?)?.toDouble() ?? 91.8,
      activeUnifiedExams: json['active_unified_exams'] ?? 2,
    );
  }
}

/// School Item Model (المدرسة التابعة وتصنيف الوزن)
class SchoolItem {
  final int id;
  final String code;
  final String name;
  final String governorate;
  final String weightTier; // tier_a_small, tier_b_medium, tier_c_large
  final int studentCount;
  final int teacherCount;
  final double compliance;
  final String status; // excellent, good, warning_under_quota
  final double annualFee;

  SchoolItem({
    required this.id,
    required this.code,
    required this.name,
    required this.governorate,
    required this.weightTier,
    required this.studentCount,
    required this.teacherCount,
    required this.compliance,
    required this.status,
    required this.annualFee,
  });

  String get weightTierArabic {
    switch (weightTier) {
      case 'tier_a_small':
        return 'الفئة (أ) - صغيرة/نائية';
      case 'tier_c_large':
        return 'الفئة (ج) - كبرى/مركزية';
      case 'tier_b_medium':
      default:
        return 'الفئة (ب) - قياسية';
    }
  }

  factory SchoolItem.fromJson(Map<String, dynamic> json) {
    return SchoolItem(
      id: json['id'] ?? 0,
      code: json['code'] ?? '',
      name: json['name'] ?? '',
      governorate: json['governorate'] ?? 'العاصمة',
      weightTier: json['weight_tier'] ?? 'tier_b_medium',
      studentCount: json['student_count'] ?? 450,
      teacherCount: json['teacher_count'] ?? 24,
      compliance: (json['compliance'] as num?)?.toDouble() ?? 90.0,
      status: json['status'] ?? 'good',
      annualFee: (json['annual_fee'] as num?)?.toDouble() ?? 450.0,
    );
  }
}

/// Teacher Item Model (المعلم ومؤشر دورية الأسبوعين)
class TeacherItem {
  final int id;
  final String name;
  final String subject;
  final String grade;
  final String quotaStatus; // completed, pending, overdue
  final String lastLesson;
  final double aiScore;
  final String recordedAt;

  TeacherItem({
    required this.id,
    required this.name,
    required this.subject,
    required this.grade,
    required this.quotaStatus,
    required this.lastLesson,
    required this.aiScore,
    required this.recordedAt,
  });

  bool get isCompleted => quotaStatus == 'completed';

  factory TeacherItem.fromJson(Map<String, dynamic> json) {
    return TeacherItem(
      id: json['id'] ?? 0,
      name: json['name'] ?? '',
      subject: json['subject'] ?? '',
      grade: json['grade'] ?? '',
      quotaStatus: json['quota_status'] ?? 'pending',
      lastLesson: json['last_lesson'] ?? '',
      aiScore: (json['ai_score'] as num?)?.toDouble() ?? 90.0,
      recordedAt: json['recorded_at'] ?? 'مؤخراً',
    );
  }
}

/// Recorded Classroom Lesson Result (نتيجة فحص الحصة المرئية)
class RecordedLessonResult {
  final String lessonUuid;
  final String teacherName;
  final String subject;
  final String lessonTitle;
  final double fileSizeMb;
  final int durationMinutes;
  final double aiAlignmentScore;
  final String teacherTalkRatio;
  final String status;
  final String reportSummary;
  final List<Map<String, String>> socraticCheckpoints;

  RecordedLessonResult({
    required this.lessonUuid,
    required this.teacherName,
    required this.subject,
    required this.lessonTitle,
    required this.fileSizeMb,
    required this.durationMinutes,
    required this.aiAlignmentScore,
    required this.teacherTalkRatio,
    required this.status,
    required this.reportSummary,
    required this.socraticCheckpoints,
  });

  factory RecordedLessonResult.fromJson(Map<String, dynamic> json) {
    var rawCheckpoints = json['socratic_checkpoints'] as List<dynamic>? ?? [];
    List<Map<String, String>> checkpoints = rawCheckpoints.map((c) {
      if (c is Map) {
        return {
          'timestamp': c['timestamp']?.toString() ?? '',
          'question': c['question']?.toString() ?? '',
          'objective': c['objective']?.toString() ?? '',
        };
      }
      return <String, String>{};
    }).toList();

    return RecordedLessonResult(
      lessonUuid: json['lesson_uuid'] ?? '',
      teacherName: json['teacher_name'] ?? '',
      subject: json['subject'] ?? '',
      lessonTitle: json['lesson_title'] ?? '',
      fileSizeMb: (json['file_size_mb'] as num?)?.toDouble() ?? 350.0,
      durationMinutes: json['duration_minutes'] ?? 45,
      aiAlignmentScore: (json['ai_alignment_score'] as num?)?.toDouble() ?? 92.0,
      teacherTalkRatio: json['teacher_talk_ratio'] ?? '60%',
      status: json['status'] ?? 'approved_official',
      reportSummary: json['report_summary'] ?? 'تم الاعتماد بنجاح',
      socraticCheckpoints: checkpoints,
    );
  }
}

/// Unified Exam Model (الامتحان الموحد)
class UnifiedExamModel {
  final String id;
  final String title;
  final String subject;
  final String gradeLevel;
  final String scheduledTime;
  final int durationMinutes;
  final bool pushedToLab;
  final String status;
  final List<String> forms;
  final Map<String, dynamic> antiCheating;

  UnifiedExamModel({
    required this.id,
    required this.title,
    required this.subject,
    required this.gradeLevel,
    required this.scheduledTime,
    required this.durationMinutes,
    required this.pushedToLab,
    required this.status,
    required this.forms,
    required this.antiCheating,
  });

  factory UnifiedExamModel.fromJson(Map<String, dynamic> json) {
    return UnifiedExamModel(
      id: json['id'] ?? '',
      title: json['title'] ?? '',
      subject: json['subject'] ?? '',
      gradeLevel: json['grade_level'] ?? '',
      scheduledTime: json['scheduled_time'] ?? '',
      durationMinutes: json['duration_minutes'] ?? 60,
      pushedToLab: json['pushed_to_lab'] == true,
      status: json['status'] ?? 'scheduled',
      forms: (json['forms'] as List<dynamic>?)?.map((e) => e.toString()).toList() ?? ['نموذج أ', 'نموذج ب'],
      antiCheating: json['anti_cheating'] as Map<String, dynamic>? ?? {},
    );
  }
}

/// Exam Anomaly Alert Model (تنبيهات الشذوذ الإحصائي والغش)
class ExamAnomalyAlert {
  final String id;
  final String type; // speed_impossible, error_clustering, performance_leap
  final String schoolName;
  final String subject;
  final String description;
  final String severity;
  final String timestamp;

  ExamAnomalyAlert({
    required this.id,
    required this.type,
    required this.schoolName,
    required this.subject,
    required this.description,
    required this.severity,
    required this.timestamp,
  });

  factory ExamAnomalyAlert.fromJson(Map<String, dynamic> json) {
    return ExamAnomalyAlert(
      id: json['id'] ?? '',
      type: json['type'] ?? 'speed_impossible',
      schoolName: json['school_name'] ?? '',
      subject: json['subject'] ?? '',
      description: json['description'] ?? '',
      severity: json['severity'] ?? 'medium',
      timestamp: json['timestamp'] ?? '',
    );
  }
}