import 'package:flutter/material.dart';
import 'package:flutter_animate/flutter_animate.dart';
import '../theme.dart';

class SystemMessagesPage extends StatelessWidget {
  const SystemMessagesPage({super.key});

  @override
  Widget build(BuildContext context) {
    final messages = <_SystemMessage>[
      _SystemMessage(
        title: '版本更新',
        content: '智念商家端 v1.0.1 已发布，新增应用插件中心，优化首页和消息中心交互体验。',
        time: '今天 09:30',
        type: '版本更新',
        typeColor: const Color(0xFF3B82F6),
      ),
      _SystemMessage(
        title: '春节运营公告',
        content: '春节期间平台手续费立减 30%，详情可在「活动发布」中查看活动模板。',
        time: '昨天 18:20',
        type: '运营公告',
        typeColor: const Color(0xFF10B981),
      ),
      _SystemMessage(
        title: '安全提醒',
        content: '检测到近期有钓鱼链接冒用商家端信息，请勿在陌生短信中点击链接登录。',
        time: '3 天前',
        type: '安全提醒',
        typeColor: const Color(0xFFF59E0B),
      ),
    ];

    return Scaffold(
      backgroundColor: AppColors.background,
      appBar: AppBar(
        title: const Text('系统通知'),
        backgroundColor: AppColors.surface,
        elevation: 0,
        scrolledUnderElevation: 0,
        surfaceTintColor: Colors.transparent,
      ),
      body: messages.isEmpty
          ? _buildEmpty()
          : ListView.builder(
              padding: const EdgeInsets.fromLTRB(16, 16, 16, 24),
              itemCount: messages.length,
              itemBuilder: (context, index) {
                final m = messages[index];
                return _buildMessageCard(m, index);
              },
            ),
    );
  }

  Widget _buildMessageCard(_SystemMessage m, int index) {
    return Container(
      margin: const EdgeInsets.only(bottom: 12),
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: AppColors.surface,
        borderRadius: BorderRadius.circular(16),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withOpacity(0.03),
            blurRadius: 10,
            offset: const Offset(0, 2),
          ),
        ],
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Container(
                padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
                decoration: BoxDecoration(
                  color: m.typeColor.withOpacity(0.1),
                  borderRadius: BorderRadius.circular(6),
                ),
                child: Text(
                  m.type,
                  style: TextStyle(
                    fontSize: 11,
                    color: m.typeColor,
                    fontWeight: FontWeight.w600,
                  ),
                ),
              ),
              const Spacer(),
              Text(
                m.time,
                style: TextStyle(
                  fontSize: 12,
                  color: AppColors.textTertiary,
                ),
              ),
            ],
          ),
          const SizedBox(height: 12),
          Text(
            m.title,
            style: TextStyle(
              fontSize: 15,
              fontWeight: FontWeight.w600,
              color: AppColors.textPrimary,
            ),
          ),
          const SizedBox(height: 6),
          Text(
            m.content,
            style: TextStyle(
              fontSize: 13,
              color: AppColors.textSecondary,
              height: 1.55,
            ),
          ),
        ],
      ),
    ).animate().fadeIn(duration: 300.ms, delay: (index * 60).ms).slideY(begin: 0.1, end: 0, duration: 300.ms);
  }

  Widget _buildEmpty() {
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Icon(
            Icons.notifications_off_outlined,
            size: 64,
            color: AppColors.textTertiary.withOpacity(0.5),
          ),
          const SizedBox(height: 16),
          Text(
            '暂无系统通知',
            style: TextStyle(fontSize: 16, color: AppColors.textSecondary),
          ),
        ],
      ),
    );
  }
}

class _SystemMessage {
  final String title;
  final String content;
  final String time;
  final String type;
  final Color typeColor;

  const _SystemMessage({
    required this.title,
    required this.content,
    required this.time,
    required this.type,
    required this.typeColor,
  });
}