import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import '../models/directorate_models.dart';
import '../services/directorate_api_service.dart';

class DirectorateCommandScreen extends StatefulWidget {
  const DirectorateCommandScreen({super.key});

  @override
  State<DirectorateCommandScreen> createState() =>
      _DirectorateCommandScreenState();
}

class _DirectorateCommandScreenState extends State<DirectorateCommandScreen>
    with SingleTickerProviderStateMixin {
  late TabController _tabController;
  bool _isLoading = true;
  Map<String, dynamic>? _data;

  @override
  void initState() {
    super.initState();
    _tabController = TabController(length: 3, vsync: this);
    _loadDashboard();
  }

  Future<void> _loadDashboard() async {
    setState(() => _isLoading = true);
    final res = await DirectorateApiService.fetchDirectorateDashboard();
    if (mounted) {
      setState(() {
        _data = res;
        _isLoading = false;
      });
    }
  }

  @override
  void dispose() {
    _tabController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    if (_isLoading) {
      return const Scaffold(
        backgroundColor: Color(0xFF070B12),
        body: Center(
          child:
              CupertinoActivityIndicator(color: Color(0xFF8B5CF6), radius: 18),
        ),
      );
    }

    final dir = _data?['directorate'] ?? {};
    final schools = (_data?['schools'] as List? ?? [])
        .map((s) => SchoolItem.fromJson(s))
        .toList();
    final anomalies = (_data?['anomalies'] as List? ?? [])
        .map((a) => ExamAnomalyAlert.fromJson(a))
        .toList();
    final radar = _data?['radar'] ?? {};

    return Scaffold(
      backgroundColor: const Color(0xFF070B12),
      appBar: AppBar(
        backgroundColor: const Color(0xFF0E1626),
        elevation: 0,
        centerTitle: false,
        title: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              children: [
                Container(
                  width: 8,
                  height: 8,
                  decoration: const BoxDecoration(
                    color: Color(0xFF10B981),
                    shape: BoxShape.circle,
                  ),
                ),
                const SizedBox(width: 6),
                Text(
                  dir['name'] ?? 'مديرية الثقافة العسكرية',
                  style: const TextStyle(
                      fontSize: 16,
                      fontWeight: FontWeight.w800,
                      color: Colors.white),
                ),
              ],
            ),
            const SizedBox(height: 2),
            const Text(
              'لوحة القائد الأعلى للرقابة والسيادة الرقمية (43 مدرسة في المملكة)',
              style: TextStyle(fontSize: 12, color: Color(0xFF94A3B8)),
            ),
          ],
        ),
        bottom: TabBar(
          controller: _tabController,
          indicatorColor: const Color(0xFF8B5CF6),
          indicatorWeight: 3,
          labelColor: Colors.white,
          unselectedLabelColor: const Color(0xFF64748B),
          labelStyle:
              const TextStyle(fontWeight: FontWeight.w700, fontSize: 13.5),
          tabs: const [
            Tab(
              icon: Icon(CupertinoIcons.chart_bar_alt_fill, size: 18),
              text: 'الرؤية الكلية والمدارس',
            ),
            Tab(
              icon: Icon(CupertinoIcons.star_circle_fill, size: 18),
              text: 'رادار المعلمين والتسييل',
            ),
            Tab(
              icon: Icon(CupertinoIcons.shield_lefthalf_fill, size: 18),
              text: 'نزاهة الامتحانات الموحدة',
            ),
          ],
        ),
      ),
      body: TabBarView(
        controller: _tabController,
        children: [
          _buildMacroOverviewTab(dir, schools),
          _buildTeachersRadarTab(radar),
          _buildExamIntegrityTab(anomalies),
        ],
      ),
    );
  }

  // ---------------------------------------------------------------------------
  // TAB 1: Macro Directorate Metrics & 43 Schools Matrix
  // ---------------------------------------------------------------------------
  Widget _buildMacroOverviewTab(
      Map<String, dynamic> dir, List<SchoolItem> schools) {
    return SingleChildScrollView(
      padding: const EdgeInsets.all(18),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          // Commander KPI Ribbon
          Container(
            padding: const EdgeInsets.all(18),
            decoration: BoxDecoration(
              gradient: const LinearGradient(
                colors: [Color(0xFF1E1B4B), Color(0xFF0F172A)],
                begin: Alignment.topLeft,
                end: Alignment.bottomRight,
              ),
              borderRadius: BorderRadius.circular(16),
              border:
                  Border.all(color: const Color(0xFF6366F1).withOpacity(0.4)),
            ),
            child: Column(
              children: [
                Row(
                  children: [
                    Expanded(
                      child: _kpiCell(
                        'إجمالي المدارس',
                        '${dir['total_schools'] ?? 43} مدرسة',
                        CupertinoIcons.building_2_fill,
                        const Color(0xFF818CF8),
                      ),
                    ),
                    Expanded(
                      child: _kpiCell(
                        'الطلبة المسجلون',
                        '${dir['total_students'] ?? 19350}',
                        CupertinoIcons.person_3_fill,
                        const Color(0xFF38BDF8),
                      ),
                    ),
                  ],
                ),
                const SizedBox(height: 14),
                Row(
                  children: [
                    Expanded(
                      child: _kpiCell(
                        'معلمو الثقافة العسكرية',
                        '${dir['total_teachers'] ?? 812} معلم',
                        CupertinoIcons.person_badge_plus_fill,
                        const Color(0xFFFBBF24),
                      ),
                    ),
                    Expanded(
                      child: _kpiCell(
                        'نسبة كوتة الحصص',
                        '${dir['compliance_rate'] ?? 94.5}%',
                        CupertinoIcons.check_mark_circled_solid,
                        const Color(0xFF34D399),
                      ),
                    ),
                  ],
                ),
              ],
            ),
          ),
          const SizedBox(height: 20),

          // Schools Weight Tier Breakdown
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              const Text(
                'توزيع مدارس الثقافة العسكرية الـ 43 حسب تصنيف الوزن:',
                style: TextStyle(
                    fontSize: 14,
                    fontWeight: FontWeight.w700,
                    color: Colors.white),
              ),
              Text(
                'إجمالي العقد: 20,000 د.أ',
                style: TextStyle(
                    fontSize: 12,
                    fontWeight: FontWeight.w700,
                    color: const Color(0xFFA78BFA)),
              ),
            ],
          ),
          const SizedBox(height: 12),

          // School List Cards
          ...schools.map((s) => Container(
                margin: const EdgeInsets.only(bottom: 12),
                padding: const EdgeInsets.all(16),
                decoration: BoxDecoration(
                  color: const Color(0xFF0F172A),
                  borderRadius: BorderRadius.circular(14),
                  border: Border.all(color: const Color(0xFF1E293B)),
                ),
                child: Row(
                  children: [
                    Container(
                      width: 44,
                      height: 44,
                      decoration: BoxDecoration(
                        color: _statusColor(s.status).withOpacity(0.15),
                        borderRadius: BorderRadius.circular(10),
                      ),
                      child: Icon(CupertinoIcons.building_2_fill,
                          color: _statusColor(s.status), size: 22),
                    ),
                    const SizedBox(width: 14),
                    Expanded(
                      child: Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Text(
                            s.name,
                            style: const TextStyle(
                                fontSize: 14,
                                fontWeight: FontWeight.w700,
                                color: Colors.white),
                          ),
                          const SizedBox(height: 4),
                          Row(
                            children: [
                              Text(
                                s.governorate,
                                style: const TextStyle(
                                    fontSize: 12, color: Color(0xFF94A3B8)),
                              ),
                              const SizedBox(width: 8),
                              Container(
                                padding: const EdgeInsets.symmetric(
                                    horizontal: 6, vertical: 1),
                                decoration: BoxDecoration(
                                  color: const Color(0xFF1E293B),
                                  borderRadius: BorderRadius.circular(4),
                                ),
                                child: Text(
                                  s.weightTierArabic,
                                  style: const TextStyle(
                                      fontSize: 11, color: Color(0xFFA78BFA)),
                                ),
                              ),
                            ],
                          ),
                        ],
                      ),
                    ),
                    Column(
                      crossAxisAlignment: CrossAxisAlignment.end,
                      children: [
                        Text(
                          '${s.compliance}% التزام',
                          style: TextStyle(
                            fontSize: 12.5,
                            fontWeight: FontWeight.w700,
                            color: _statusColor(s.status),
                          ),
                        ),
                        const SizedBox(height: 4),
                        Text(
                          '${s.studentCount} طالب · ${s.annualFee.toInt()} د.أ/سنة',
                          style: const TextStyle(
                              fontSize: 11, color: Color(0xFF64748B)),
                        ),
                      ],
                    ),
                  ],
                ),
              )),
        ],
      ),
    );
  }

  // ---------------------------------------------------------------------------
  // TAB 2: Teachers Radar & Marketplace Monetization
  // ---------------------------------------------------------------------------
  Widget _buildTeachersRadarTab(Map<String, dynamic> radar) {
    final topTeachers = (radar['top_teachers'] as List? ?? []);
    final needingSupport = (radar['needing_support'] as List? ?? []);

    return SingleChildScrollView(
      padding: const EdgeInsets.all(18),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          // Monetization Model Header
          Container(
            padding: const EdgeInsets.all(16),
            decoration: BoxDecoration(
              gradient: const LinearGradient(
                colors: [Color(0xFF14532D), Color(0xFF0F172A)],
                begin: Alignment.topLeft,
                end: Alignment.bottomRight,
              ),
              borderRadius: BorderRadius.circular(16),
              border:
                  Border.all(color: const Color(0xFF22C55E).withOpacity(0.4)),
            ),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                const Row(
                  children: [
                    Icon(CupertinoIcons.money_dollar_circle_fill,
                        color: Color(0xFF4ADE80), size: 22),
                    SizedBox(width: 8),
                    Text(
                      'سوق تسييل المعلمين المتميزين (شراكة الأرباح)',
                      style: TextStyle(
                          fontSize: 14.5,
                          fontWeight: FontWeight.w700,
                          color: Colors.white),
                    ),
                  ],
                ),
                const SizedBox(height: 8),
                const Text(
                  'المعلمون الحاصلون على تقييم 95%+ يتم منحهم اعتماد "معلم صَقِل المعتمد" وتُباع شروحاتهم خارج الثقافة العسكرية مع توزيع العائد: 55% للمعلم، 15% للمديرية، 30% لصَقِل.',
                  style: TextStyle(
                      fontSize: 12.5, color: Color(0xFFCBD5E1), height: 1.5),
                ),
              ],
            ),
          ),
          const SizedBox(height: 20),

          // Top Teachers List
          const Text(
            '🌟 أفضل المعلمين المرشحين للتسييل والاعتماد الرسمي:',
            style: TextStyle(
                fontSize: 14, fontWeight: FontWeight.w700, color: Colors.white),
          ),
          const SizedBox(height: 12),
          ...topTeachers.map((t) => Container(
                margin: const EdgeInsets.only(bottom: 10),
                padding: const EdgeInsets.all(14),
                decoration: BoxDecoration(
                  color: const Color(0xFF0F172A),
                  borderRadius: BorderRadius.circular(14),
                  border: Border.all(
                      color: const Color(0xFF10B981).withOpacity(0.4)),
                ),
                child: Row(
                  children: [
                    const CircleAvatar(
                      radius: 20,
                      backgroundColor: Color(0xFF065F46),
                      child: Icon(CupertinoIcons.star_fill,
                          color: Color(0xFF34D399), size: 18),
                    ),
                    const SizedBox(width: 12),
                    Expanded(
                      child: Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Text(
                            t['name'] ?? '',
                            style: const TextStyle(
                                fontSize: 14,
                                fontWeight: FontWeight.w700,
                                color: Colors.white),
                          ),
                          const SizedBox(height: 2),
                          Text(
                            '${t['subject']} · ${t['school']}',
                            style: const TextStyle(
                                fontSize: 12, color: Color(0xFF94A3B8)),
                          ),
                        ],
                      ),
                    ),
                    Container(
                      padding: const EdgeInsets.symmetric(
                          horizontal: 8, vertical: 3),
                      decoration: BoxDecoration(
                        color: const Color(0xFF10B981).withOpacity(0.2),
                        borderRadius: BorderRadius.circular(6),
                      ),
                      child: Text(
                        '${t['score']}% تقييم AI',
                        style: const TextStyle(
                            fontSize: 12,
                            fontWeight: FontWeight.w800,
                            color: Color(0xFF34D399)),
                      ),
                    ),
                  ],
                ),
              )),
          const SizedBox(height: 18),

          // Early Intervention Radar
          const Text(
            '⚠️ رادار الإنذار والتوجيه المبكر (معالجة القصور قبل التوجيهي):',
            style: TextStyle(
                fontSize: 14, fontWeight: FontWeight.w700, color: Colors.white),
          ),
          const SizedBox(height: 12),
          ...needingSupport.map((ns) => Container(
                margin: const EdgeInsets.only(bottom: 10),
                padding: const EdgeInsets.all(14),
                decoration: BoxDecoration(
                  color: const Color(0xFF0F172A),
                  borderRadius: BorderRadius.circular(14),
                  border: Border.all(
                      color: const Color(0xFFEF4444).withOpacity(0.3)),
                ),
                child: Row(
                  children: [
                    const CircleAvatar(
                      radius: 20,
                      backgroundColor: Color(0xFF7F1D1D),
                      child: Icon(CupertinoIcons.exclamationmark_triangle_fill,
                          color: Color(0xFFF87171), size: 18),
                    ),
                    const SizedBox(width: 12),
                    Expanded(
                      child: Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Text(
                            ns['name'] ?? '',
                            style: const TextStyle(
                                fontSize: 14,
                                fontWeight: FontWeight.w700,
                                color: Colors.white),
                          ),
                          const SizedBox(height: 2),
                          Text(
                            '${ns['school']} · ${ns['issue']}',
                            style: const TextStyle(
                                fontSize: 12, color: Color(0xFFF87171)),
                          ),
                        ],
                      ),
                    ),
                    Text(
                      '${ns['score']}%',
                      style: const TextStyle(
                          fontSize: 13,
                          fontWeight: FontWeight.w700,
                          color: Color(0xFFF87171)),
                    ),
                  ],
                ),
              )),
        ],
      ),
    );
  }

  // ---------------------------------------------------------------------------
  // TAB 3: Kingdom Exam Integrity & Statistical Fraud Detection
  // ---------------------------------------------------------------------------
  Widget _buildExamIntegrityTab(List<ExamAnomalyAlert> anomalies) {
    return SingleChildScrollView(
      padding: const EdgeInsets.all(18),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          // Live Exam Integrity Header
          Container(
            padding: const EdgeInsets.all(18),
            decoration: BoxDecoration(
              gradient: const LinearGradient(
                colors: [Color(0xFF1E293B), Color(0xFF0F172A)],
                begin: Alignment.topLeft,
                end: Alignment.bottomRight,
              ),
              borderRadius: BorderRadius.circular(16),
              border:
                  Border.all(color: const Color(0xFF0284C7).withOpacity(0.5)),
            ),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                const Row(
                  children: [
                    Icon(CupertinoIcons.shield_fill,
                        color: Color(0xFF38BDF8), size: 20),
                    SizedBox(width: 8),
                    Text(
                      'غرفة عمليات نزاهة الامتحانات الموحدة',
                      style: TextStyle(
                          fontSize: 15,
                          fontWeight: FontWeight.w800,
                          color: Colors.white),
                    ),
                  ],
                ),
                const SizedBox(height: 8),
                const Text(
                  'مراقبة لحظية لنحو 19,000 طالب يخوضون الامتحان الموحد المتزامن عبر 43 مدرسة، برصد فوري للسرعة المستحيلة وتكتل الأخطاء.',
                  style: TextStyle(
                      fontSize: 12.5, color: Color(0xFF94A3B8), height: 1.5),
                ),
              ],
            ),
          ),
          const SizedBox(height: 20),

          const Text(
            'تنبيهات الشذوذ الإحصائي وشبهات التواطؤ:',
            style: TextStyle(
                fontSize: 14, fontWeight: FontWeight.w700, color: Colors.white),
          ),
          const SizedBox(height: 12),

          if (anomalies.isEmpty)
            Container(
              padding: const EdgeInsets.all(20),
              decoration: BoxDecoration(
                color: const Color(0xFF0F172A),
                borderRadius: BorderRadius.circular(14),
                border: Border.all(color: const Color(0xFF1E293B)),
              ),
              child: const Center(
                child: Text(
                  '✅ لا توجد أي تنبيهات شذوذ حالياً · كافة المدارس تعمل بانضباط تام',
                  style: TextStyle(color: Color(0xFF10B981), fontSize: 13.5),
                ),
              ),
            )
          else
            ...anomalies.map((anm) => Container(
                  margin: const EdgeInsets.only(bottom: 12),
                  padding: const EdgeInsets.all(16),
                  decoration: BoxDecoration(
                    color: const Color(0xFF1E1B2E),
                    borderRadius: BorderRadius.circular(14),
                    border: Border.all(
                        color: const Color(0xFFEF4444).withOpacity(0.5)),
                  ),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Row(
                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                        children: [
                          Row(
                            children: [
                              const Icon(
                                  CupertinoIcons
                                      .exclamationmark_triangle_fill,
                                  color: Color(0xFFEF4444),
                                  size: 18),
                              const SizedBox(width: 8),
                              Text(
                                anm.schoolName,
                                style: const TextStyle(
                                    fontSize: 14,
                                    fontWeight: FontWeight.w700,
                                    color: Colors.white),
                              ),
                            ],
                          ),
                          Text(
                            anm.timestamp,
                            style: const TextStyle(
                                fontSize: 11.5, color: Color(0xFF94A3B8)),
                          ),
                        ],
                      ),
                      const SizedBox(height: 8),
                      Text(
                        anm.description,
                        style: const TextStyle(
                            fontSize: 13,
                            color: Color(0xFFFCA5A5),
                            height: 1.4),
                      ),
                      const SizedBox(height: 12),
                      ElevatedButton.icon(
                        onPressed: () {
                          ScaffoldMessenger.of(context).showSnackBar(
                            const SnackBar(
                              content: Text(
                                  '🎥 جاري فتح العينة البانورامية المسجلة (16.5 MB) لتلك الدقيقة للتحقق البصري المباشر'),
                              backgroundColor: Color(0xFF0284C7),
                            ),
                          );
                        },
                        icon: const Icon(CupertinoIcons.play_circle_fill,
                            size: 16),
                        label: const Text(
                          'عرض العينة البانورامية المسجلة في هذه الدقيقة 👁️',
                          style: TextStyle(fontSize: 12.5),
                        ),
                        style: ElevatedButton.styleFrom(
                          backgroundColor: const Color(0xFF0284C7),
                          padding: const EdgeInsets.symmetric(
                              vertical: 10, horizontal: 14),
                          shape: RoundedRectangleBorder(
                              borderRadius: BorderRadius.circular(8)),
                        ),
                      ),
                    ],
                  ),
                )),
        ],
      ),
    );
  }

  Widget _kpiCell(
      String title, String value, IconData icon, Color accentColor) {
    return Row(
      children: [
        Container(
          padding: const EdgeInsets.all(8),
          decoration: BoxDecoration(
            color: accentColor.withOpacity(0.15),
            shape: BoxShape.circle,
          ),
          child: Icon(icon, color: accentColor, size: 20),
        ),
        const SizedBox(width: 10),
        Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(
              title,
              style: const TextStyle(fontSize: 11.5, color: Color(0xFF94A3B8)),
            ),
            const SizedBox(height: 2),
            Text(
              value,
              style: const TextStyle(
                  fontSize: 15,
                  fontWeight: FontWeight.w800,
                  color: Colors.white),
            ),
          ],
        )
      ],
    );
  }

  Color _statusColor(String status) {
    switch (status) {
      case 'excellent':
        return const Color(0xFF10B981);
      case 'warning_under_quota':
        return const Color(0xFFEF4444);
      case 'good':
      default:
        return const Color(0xFF38BDF8);
    }
  }
}