import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:diagd/src/rust/api/diagnostics.dart';

class SecurityTab extends StatelessWidget {
  final SecurityAuditReport security;

  const SecurityTab({
    super.key,
    required this.security,
  });

  @override
  Widget build(BuildContext context) {
    final score = security.securityScore;
    final scoreColor = score >= 80
        ? const Color(0xFF3FB950)
        : (score >= 50 ? const Color(0xFFD29922) : const Color(0xFFF85149));

    final failedChecks = security.hardeningChecks.where((c) => !c.isSecure).length;
    final passedChecks = security.hardeningChecks.where((c) => c.isSecure).length;

    return SingleChildScrollView(
      padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 20),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // Security Score Hero Card
          Container(
            padding: const EdgeInsets.all(20),
            decoration: BoxDecoration(
              color: const Color(0xFF161B22),
              borderRadius: BorderRadius.circular(12),
              border: Border.all(color: scoreColor.withAlpha(70)),
            ),
            child: Row(
              children: [
                Stack(
                  alignment: Alignment.center,
                  children: [
                    SizedBox(
                      width: 80,
                      height: 80,
                      child: CircularProgressIndicator(
                        value: score / 100.0,
                        strokeWidth: 8,
                        backgroundColor: const Color(0xFF21262D),
                        valueColor: AlwaysStoppedAnimation<Color>(scoreColor),
                      ),
                    ),
                    Column(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        Text(
                          '$score',
                          style: TextStyle(
                            fontSize: 22,
                            fontWeight: FontWeight.bold,
                            color: scoreColor,
                          ),
                        ),
                        const Text(
                          '/100',
                          style: TextStyle(fontSize: 10, color: Color(0xFF8B949E)),
                        ),
                      ],
                    ),
                  ],
                ),
                const SizedBox(width: 24),
                Expanded(
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Row(
                        children: [
                          Text(
                            'Индекс защищенности системы (Security Score)',
                            style: const TextStyle(
                              fontSize: 16,
                              fontWeight: FontWeight.bold,
                              color: Color(0xFFE6EDF3),
                            ),
                          ),
                          const SizedBox(width: 8),
                          Container(
                            padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 2),
                            decoration: BoxDecoration(
                              color: scoreColor.withAlpha(30),
                              borderRadius: BorderRadius.circular(6),
                              border: Border.all(color: scoreColor.withAlpha(80)),
                            ),
                            child: Text(
                              score >= 80 ? 'ОТЛИЧНО' : (score >= 50 ? 'ТРЕБУЕТ ВНИМАНИЯ' : 'УЯЗВИМО'),
                              style: TextStyle(
                                fontSize: 11,
                                fontWeight: FontWeight.bold,
                                color: scoreColor,
                              ),
                            ),
                          ),
                        ],
                      ),
                      const SizedBox(height: 6),
                      Text(
                        'Аудит сетевого периметра, прав суперпользователя SUID/SGID, параметров защиты ядра (ASLR, ptrace, eBPF) и конфигурации SSH.',
                        style: const TextStyle(fontSize: 13, color: Color(0xFF8B949E)),
                      ),
                      const SizedBox(height: 12),
                      Row(
                        children: [
                          _buildMiniBadge('Открытых портов (0.0.0.0): ${security.exposedPorts.length}',
                              security.exposedPorts.isNotEmpty ? const Color(0xFFD29922) : const Color(0xFF3FB950)),
                          const SizedBox(width: 10),
                          _buildMiniBadge('SUID аномалий: ${security.suidAnomalies.length}',
                              security.suidAnomalies.isNotEmpty ? const Color(0xFFF85149) : const Color(0xFF3FB950)),
                          const SizedBox(width: 10),
                          _buildMiniBadge('Пройдено тестов: $passedChecks / ${security.hardeningChecks.length}',
                              failedChecks > 0 ? const Color(0xFFD29922) : const Color(0xFF3FB950)),
                        ],
                      ),
                    ],
                  ),
                ),
              ],
            ),
          ),
          const SizedBox(height: 24),

          // 1. Exposed Listening Ports
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              const Text(
                'СЕТЕВОЙ ПЕРИМЕТР (ПОРТЫ, СЛУШАЮЩИЕ 0.0.0.0 И ::)',
                style: TextStyle(
                  fontSize: 12,
                  fontWeight: FontWeight.w700,
                  letterSpacing: 1.2,
                  color: Color(0xFF8B949E),
                ),
              ),
              Text(
                'Всего: ${security.exposedPorts.length}',
                style: const TextStyle(fontSize: 12, color: Color(0xFF8B949E)),
              ),
            ],
          ),
          const SizedBox(height: 10),
          if (security.exposedPorts.isEmpty)
            _buildEmptyState('Открытых вовне портов не обнаружено. Локальный сетевой стек защищен.', Icons.verified_user_rounded)
          else
            ListView.separated(
              shrinkWrap: true,
              physics: const NeverScrollableScrollPhysics(),
              itemCount: security.exposedPorts.length,
              separatorBuilder: (context, index) => const SizedBox(height: 8),
              itemBuilder: (context, index) {
                final port = security.exposedPorts[index];
                return _buildPortCard(context, port);
              },
            ),
          const SizedBox(height: 28),

          // 2. SUID / SGID Anomalies
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              const Text(
                'ПОДОЗРИТЕЛЬНЫЕ SUID / SGID БИНАРНЫЕ ФАЙЛЫ',
                style: TextStyle(
                  fontSize: 12,
                  fontWeight: FontWeight.w700,
                  letterSpacing: 1.2,
                  color: Color(0xFF8B949E),
                ),
              ),
              Text(
                'Аномалий: ${security.suidAnomalies.length}',
                style: const TextStyle(fontSize: 12, color: Color(0xFF8B949E)),
              ),
            ],
          ),
          const SizedBox(height: 10),
          if (security.suidAnomalies.isEmpty)
            _buildEmptyState('Аномальных или небезопасных SUID/SGID файлов в общедоступных каталогах (/tmp, /dev/shm) не обнаружено.', Icons.check_circle_outline_rounded)
          else
            ListView.separated(
              shrinkWrap: true,
              physics: const NeverScrollableScrollPhysics(),
              itemCount: security.suidAnomalies.length,
              separatorBuilder: (context, index) => const SizedBox(height: 8),
              itemBuilder: (context, index) {
                final suid = security.suidAnomalies[index];
                return _buildSuidCard(suid);
              },
            ),
          const SizedBox(height: 28),

          // 3. Kernel & OS Hardening Checklist
          const Text(
            'ЧЕК-ЛИСТ ЗАЩИТЫ ЯДРА И ОПЕРАЦИОННОЙ СИСТЕМЫ (HARDENING)',
            style: TextStyle(
              fontSize: 12,
              fontWeight: FontWeight.w700,
              letterSpacing: 1.2,
              color: Color(0xFF8B949E),
            ),
          ),
          const SizedBox(height: 10),
          ListView.separated(
            shrinkWrap: true,
            physics: const NeverScrollableScrollPhysics(),
            itemCount: security.hardeningChecks.length,
            separatorBuilder: (context, index) => const SizedBox(height: 8),
            itemBuilder: (context, index) {
              final check = security.hardeningChecks[index];
              return _buildHardeningCard(context, check);
            },
          ),
        ],
      ),
    );
  }

  Widget _buildMiniBadge(String text, Color color) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
      decoration: BoxDecoration(
        color: color.withAlpha(20),
        borderRadius: BorderRadius.circular(6),
        border: Border.all(color: color.withAlpha(60)),
      ),
      child: Text(
        text,
        style: TextStyle(fontSize: 11, fontWeight: FontWeight.w600, color: color),
      ),
    );
  }

  Widget _buildEmptyState(String text, IconData icon) {
    return Container(
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: const Color(0xFF161B22),
        borderRadius: BorderRadius.circular(8),
        border: Border.all(color: const Color(0xFF238636).withAlpha(50)),
      ),
      child: Row(
        children: [
          Icon(icon, color: const Color(0xFF3FB950), size: 22),
          const SizedBox(width: 12),
          Expanded(
            child: Text(
              text,
              style: const TextStyle(fontSize: 13, color: Color(0xFF8B949E)),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildPortCard(BuildContext context, ListeningPortInfo port) {
    final (Color badgeColor, String badgeText) = switch (port.riskLevel) {
      Severity.critical => (const Color(0xFFF85149), 'CRITICAL'),
      Severity.warning => (const Color(0xFFD29922), 'WARNING'),
      Severity.info => (const Color(0xFF3FB950), 'INFO'),
    };

    return Container(
      padding: const EdgeInsets.all(14),
      decoration: BoxDecoration(
        color: const Color(0xFF161B22),
        borderRadius: BorderRadius.circular(8),
        border: Border.all(color: badgeColor.withAlpha(60)),
      ),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Container(
            padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
            decoration: BoxDecoration(
              color: badgeColor.withAlpha(25),
              borderRadius: BorderRadius.circular(6),
              border: Border.all(color: badgeColor.withAlpha(80)),
            ),
            child: Text(
              badgeText,
              style: TextStyle(fontSize: 11, fontWeight: FontWeight.bold, color: badgeColor),
            ),
          ),
          const SizedBox(width: 14),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Row(
                  children: [
                    Text(
                      '${port.protocol.toUpperCase()} ${port.port}',
                      style: const TextStyle(
                        fontSize: 15,
                        fontWeight: FontWeight.bold,
                        color: Color(0xFFE6EDF3),
                      ),
                    ),
                    const SizedBox(width: 10),
                    Container(
                      padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 1),
                      decoration: BoxDecoration(
                        color: const Color(0xFF21262D),
                        borderRadius: BorderRadius.circular(4),
                      ),
                      child: Text(
                        port.processName.isNotEmpty ? port.processName : 'unknown process',
                        style: const TextStyle(fontSize: 12, color: Color(0xFF58A6FF), fontFamily: 'monospace'),
                      ),
                    ),
                    if (port.pid != null) ...[
                      const SizedBox(width: 6),
                      Text('(PID: ${port.pid})', style: const TextStyle(fontSize: 11, color: Color(0xFF8B949E))),
                    ],
                  ],
                ),
                const SizedBox(height: 4),
                Text(
                  'Адрес прослушивания: ${port.localAddress}',
                  style: const TextStyle(fontSize: 12, color: Color(0xFF8B949E)),
                ),
                if (port.recommendation.isNotEmpty) ...[
                  const SizedBox(height: 6),
                  Row(
                    children: [
                      const Icon(Icons.arrow_right_rounded, size: 18, color: Color(0xFFD29922)),
                      Expanded(
                        child: Text(
                          port.recommendation,
                          style: TextStyle(fontSize: 12, color: badgeColor),
                        ),
                      ),
                    ],
                  ),
                ],
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildSuidCard(SuidAnomalyInfo suid) {
    return Container(
      padding: const EdgeInsets.all(14),
      decoration: BoxDecoration(
        color: const Color(0xFF161B22),
        borderRadius: BorderRadius.circular(8),
        border: Border.all(color: const Color(0xFFF85149).withAlpha(60)),
      ),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          const Icon(Icons.warning_amber_rounded, color: Color(0xFFF85149), size: 22),
          const SizedBox(width: 12),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  suid.path,
                  style: const TextStyle(
                    fontSize: 14,
                    fontWeight: FontWeight.bold,
                    color: Color(0xFFE6EDF3),
                    fontFamily: 'monospace',
                  ),
                ),
                const SizedBox(height: 4),
                Text(
                  'Владелец: ${suid.owner} | Права: ${suid.permissions}',
                  style: const TextStyle(fontSize: 12, color: Color(0xFF8B949E)),
                ),
                const SizedBox(height: 4),
                Text(
                  suid.riskReason,
                  style: const TextStyle(fontSize: 12, color: Color(0xFFF85149)),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildHardeningCard(BuildContext context, SecurityCheckItem check) {
    final isPass = check.isSecure;
    final color = isPass ? const Color(0xFF3FB950) : const Color(0xFFF85149);

    return Container(
      padding: const EdgeInsets.all(14),
      decoration: BoxDecoration(
        color: const Color(0xFF161B22),
        borderRadius: BorderRadius.circular(8),
        border: Border.all(color: color.withAlpha(50)),
      ),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Icon(
            isPass ? Icons.check_circle_rounded : Icons.cancel_rounded,
            color: color,
            size: 20,
          ),
          const SizedBox(width: 12),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    Text(
                      check.name,
                      style: const TextStyle(
                        fontSize: 14,
                        fontWeight: FontWeight.bold,
                        color: Color(0xFFE6EDF3),
                      ),
                    ),
                    Container(
                      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 2),
                      decoration: BoxDecoration(
                        color: color.withAlpha(20),
                        borderRadius: BorderRadius.circular(6),
                      ),
                      child: Text(
                        check.status,
                        style: TextStyle(
                          fontSize: 11,
                          fontWeight: FontWeight.bold,
                          color: color,
                        ),
                      ),
                    ),
                  ],
                ),
                const SizedBox(height: 4),
                Text(
                  check.description,
                  style: const TextStyle(fontSize: 12, color: Color(0xFF8B949E)),
                ),
                if (!isPass && check.remediation != null && check.remediation!.isNotEmpty) ...[
                  const SizedBox(height: 8),
                  Container(
                    padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
                    decoration: BoxDecoration(
                      color: const Color(0xFF0D1117),
                      borderRadius: BorderRadius.circular(6),
                      border: Border.all(color: const Color(0xFF30363D)),
                    ),
                    child: Row(
                      children: [
                        const Icon(Icons.build_rounded, size: 14, color: Color(0xFFD29922)),
                        const SizedBox(width: 8),
                        Expanded(
                          child: Text(
                            check.remediation!,
                            style: const TextStyle(fontSize: 12, color: Color(0xFFE6EDF3), fontFamily: 'monospace'),
                          ),
                        ),
                        IconButton(
                          icon: const Icon(Icons.copy_rounded, size: 16, color: Color(0xFF8B949E)),
                          tooltip: 'Скопировать команду',
                          onPressed: () {
                            Clipboard.setData(ClipboardData(text: check.remediation!));
                            ScaffoldMessenger.of(context).showSnackBar(
                              const SnackBar(
                                content: Text('Команда устранения скопирована в буфер'),
                                duration: Duration(seconds: 2),
                              ),
                            );
                          },
                        ),
                      ],
                    ),
                  ),
                ],
              ],
            ),
          ),
        ],
      ),
    );
  }
}