import 'package:flutter/material.dart';
import 'package:lucide_icons/lucide_icons.dart';

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

  @override
  State<PrivacyScreen> createState() => _PrivacyScreenState();
}

class _PrivacyScreenState extends State<PrivacyScreen> {
  bool _dataEncryption = true;
  bool _anonymousMode = false;
  bool _shareAnalytics = true;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: const Color(0xFF2E1065),
      body: SafeArea(
        child: Column(
          children: [
            _buildHeader(),
            Expanded(
              child: SingleChildScrollView(
                padding: const EdgeInsets.all(16),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    _buildSecurityStatus(),
                    const SizedBox(height: 24),
                    _buildSectionTitle('隐私设置'),
                    const SizedBox(height: 12),
                    _buildSwitchTile(icon: LucideIcons.lock, title: '端到端加密', subtitle: '所有数据均已加密保护', value: _dataEncryption, onChanged: (v) => setState(() => _dataEncryption = v)),
                    const SizedBox(height: 12),
                    _buildSwitchTile(icon: LucideIcons.eyeOff, title: '匿名模式', subtitle: '隐藏个人信息和活动记录', value: _anonymousMode, onChanged: (v) => setState(() => _anonymousMode = v)),
                    const SizedBox(height: 12),
                    _buildSwitchTile(icon: LucideIcons.barChart2, title: '分享使用数据', subtitle: '帮助我们改进产品体验', value: _shareAnalytics, onChanged: (v) => setState(() => _shareAnalytics = v)),
                  ],
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildHeader() {
    return Padding(
      padding: const EdgeInsets.fromLTRB(8, 8, 16, 16),
      child: Row(
        children: [
          IconButton(onPressed: () => Navigator.of(context).pop(), icon: Icon(LucideIcons.chevronLeft, color: Colors.white.withOpacity(0.7))),
          const Text('隐私安全', style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold, color: Colors.white)),
        ],
      ),
    );
  }

  Widget _buildSecurityStatus() {
    return Container(
      padding: const EdgeInsets.all(20),
      decoration: BoxDecoration(
        color: const Color(0xFF34D399).withOpacity(0.1),
        borderRadius: BorderRadius.circular(20),
        border: Border.all(color: const Color(0xFF34D399).withOpacity(0.3)),
      ),
      child: Row(
        children: [
          Container(
            padding: const EdgeInsets.all(12),
            decoration: BoxDecoration(color: const Color(0xFF34D399).withOpacity(0.2), shape: BoxShape.circle),
            child: const Icon(LucideIcons.shieldCheck, size: 24, color: Color(0xFF34D399)),
          ),
          const SizedBox(width: 16),
          const Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text('账户安全', style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold, color: Color(0xFF34D399))),
                SizedBox(height: 4),
                Text('您的账户处于安全状态', style: TextStyle(fontSize: 12, color: Colors.white70)),
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildSectionTitle(String title) {
    return Text(title, style: TextStyle(fontSize: 12, fontWeight: FontWeight.bold, letterSpacing: 2, color: Colors.white.withOpacity(0.4)));
  }

  Widget _buildSwitchTile({required IconData icon, required String title, required String subtitle, required bool value, required ValueChanged<bool> onChanged}) {
    return Container(
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(color: Colors.white.withOpacity(0.05), borderRadius: BorderRadius.circular(16), border: Border.all(color: Colors.white.withOpacity(0.1))),
      child: Row(
        children: [
          Container(padding: const EdgeInsets.all(10), decoration: BoxDecoration(color: Colors.white.withOpacity(0.05), borderRadius: BorderRadius.circular(12)), child: Icon(icon, size: 20, color: Colors.white.withOpacity(0.7))),
          const SizedBox(width: 14),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(title, style: const TextStyle(fontSize: 15, fontWeight: FontWeight.w500, color: Colors.white)),
                const SizedBox(height: 2),
                Text(subtitle, style: TextStyle(fontSize: 12, color: Colors.white.withOpacity(0.5))),
              ],
            ),
          ),
          Switch(value: value, onChanged: onChanged, activeColor: const Color(0xFFC084FC)),
        ],
      ),
    );
  }
}
