blog_app/lib/widget/blog.dart

import 'package:blog_app/models/blog.dart';
import 'package:blog_app/pages/blog_detail_page.dart';
import 'package:blog_app/pages/category_list_page.dart';
import 'package:blog_app/utils/date_utils.dart';
import 'package:blog_app/widget/common.dart';
import 'package:flutter/material.dart';

class BlogLabel {
  final String text;
  final IconData icon;
  final Color color;

  BlogLabel(this.text, this.icon, this.color);
}

class BlogCard extends StatelessWidget {
  final Blog blog;

  const BlogCard({super.key, required this.blog});

  Widget _buildBlogLabelItem(String text, IconData icon, Color color) {
    return Container(
      padding: EdgeInsets.symmetric(horizontal: 8, vertical: 4),
      decoration: BoxDecoration(
        color: color.withAlpha(30),
        borderRadius: BorderRadius.circular(8),
        border: Border.all(color: color.withAlpha(20), width: 1),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(icon, size: 12, color: color),
          SizedBox(width: 4),
          Text(
            text,
            style: TextStyle(
              fontSize: 10,
              color: color,
              fontWeight: FontWeight.w500,
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildBlogLabel() {
    return SizedBox(
      width: double.infinity,
      child: Wrap(
        spacing: 6,
        runSpacing: 6,
        alignment: WrapAlignment.center,
        children: [
          if (blog.isGreat)
            _buildBlogLabelItem('精品', Icons.workspace_premium, Colors.amber),
          if (blog.topValue > 1)
            _buildBlogLabelItem('置顶', Icons.push_pin, Colors.red),
          _buildBlogLabelItem(blog.category, Icons.folder, Colors.blue),
          _buildBlogLabelItem(
            formatDateString(blog.createTime),
            Icons.calendar_today,
            Colors.green,
          ),
          _buildBlogLabelItem(
            formatDateString(blog.updateTime),
            Icons.calendar_month,
            Colors.orange,
          ),
          _buildBlogLabelItem(
            '${blog.visitCount} 次',
            Icons.remove_red_eye,
            Colors.purple,
          ),
          _buildBlogLabelItem(
            '${blog.wordCount} 字',
            Icons.text_fields,
            Colors.indigo,
          ),
          _buildBlogLabelItem(
            '${blog.readDuration} 分钟',
            Icons.access_time,
            Colors.brown,
          ),
        ],
      ),
    );
  }

  Widget _buildBlogTitle(BuildContext context) {
    return Text(
      blog.title,
      style: TextStyle(
        fontSize: 20,
        fontWeight: FontWeight.bold,
        color: Theme.of(context).colorScheme.primary,
      ),
      textAlign: TextAlign.center,
      maxLines: 2,
      overflow: TextOverflow.ellipsis,
    );
  }

  Widget _buildBlogSummary() {
    return SizedBox(
      width: double.infinity,
      child: Text(
        blog.summary,
        style: TextStyle(color: Colors.grey.shade700, height: 1.6),
        overflow: TextOverflow.ellipsis,
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return buildCard(
      context: context,
      child: Padding(
        padding: EdgeInsets.all(12),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            _buildBlogTitle(context),
            SizedBox(height: 16),
            _buildBlogLabel(),
            SizedBox(height: 16),
            Container(
              height: 1,
              width: 80,
              color: Theme.of(context).colorScheme.primary,
            ),
            SizedBox(height: 16),
            _buildBlogSummary(),
          ],
        ),
      ),
    );
  }
}

Widget buildCategoryTitle(BuildContext context, int count) {
  return Row(
    mainAxisAlignment: MainAxisAlignment.center,
    children: [
      Container(
        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
        decoration: BoxDecoration(
          color: Theme.of(context).colorScheme.primary,
          borderRadius: BorderRadius.circular(8),
        ),
        child: Text(
          '共 $count 个分类',
          style: const TextStyle(
            fontWeight: FontWeight.w500,
            color: Colors.white,
          ),
        ),
      ),
    ],
  );
}

Widget buildCategoryCard(BuildContext context, BlogCategory category) {
  final colors = Theme.of(context).colorScheme;

  return buildCard(
    context: context,
    child: ListTile(
      leading: Container(
        width: 50,
        height: 50,
        decoration: BoxDecoration(
          color: colors.primary.withAlpha(50),
          shape: BoxShape.circle,
        ),
        child: Icon(Icons.folder, color: colors.primary, size: 28),
      ),
      title: Text(
        category.name,
        style: const TextStyle(fontSize: 18, fontWeight: FontWeight.w600),
      ),
      subtitle: Padding(
        padding: const EdgeInsets.only(top: 4.0),
        child: Text(
          '${category.count} 篇博客',
          style: TextStyle(fontSize: 14, color: Colors.grey.shade600),
        ),
      ),
      trailing: Container(
        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
        decoration: BoxDecoration(
          color: colors.primary.withAlpha(50),
          borderRadius: BorderRadius.circular(16),
        ),
        child: Text(
          category.count.toString(),
          style: TextStyle(color: colors.primary, fontWeight: FontWeight.bold),
        ),
      ),
      onTap: () => navigateToBlogList(context, category),
    ),
  );
}

Widget buildListTitle(int count) {
  return Row(
    mainAxisAlignment: MainAxisAlignment.spaceBetween,
    children: [
      const Text(
        '博客列表',
        style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600),
      ),
      Text(
        '共 $count 篇',
        style: TextStyle(color: Colors.grey.shade600, fontSize: 14),
      ),
    ],
  );
}

Widget buildBlogListItem(BuildContext context, Blog blog, int index) {
  final colors = Theme.of(context).colorScheme;

  return buildCard(
    context: context,
    child: Padding(
      padding: EdgeInsets.all(10),
      child: Row(
        children: [
          Text(
            '$index.',
            style: TextStyle(
              fontWeight: FontWeight.w500
            ),
          ),
          SizedBox(width: 10),
          Text(
            formatDateString(blog.createTime),
            style: TextStyle(fontSize: 14, color: Colors.grey.shade600),
          ),
          SizedBox(width: 10),
          Expanded(
            child: Text(
              blog.title,
              style: TextStyle(
                fontSize: 14,
                fontWeight: FontWeight.w500,
                color: colors.primary,
              ),
              maxLines: 1,
              overflow: TextOverflow.ellipsis,
            ),
          ),
        ],
      ),
    ),
  );
}

Widget buildStatsCard({
  required BuildContext context,
  required String title,
  required int count,
  required String unit,
}) {
  return buildCard(
    context: context,
    child: Column(
      mainAxisAlignment: MainAxisAlignment.center,
      crossAxisAlignment: CrossAxisAlignment.center,
      children: [
        Text(
          title,
          style: TextStyle(
            fontSize: 16,
            color: Colors.grey.shade600,
            fontWeight: FontWeight.w500,
          ),
        ),
        const SizedBox(height: 12),
        Row(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.end,
          children: [
            Text(
              count.toString(),
              style: const TextStyle(
                fontSize: 28,
                fontWeight: FontWeight.bold,
                color: Colors.black87,
                height: 1.0,
              ),
            ),
            const SizedBox(width: 4),
            Text(
              unit,
              style: TextStyle(
                fontSize: 14,
                color: Colors.grey.shade600,
                fontWeight: FontWeight.w500,
              ),
            ),
          ],
        ),
      ],
    ),
  );
}

void navigatorToBlogDetail(BuildContext context, int blogId) {
  Navigator.push(
    context,
    MaterialPageRoute(builder: (context) => BlogDetailPage(blogId: blogId)),
  );
}

void navigateToBlogList(BuildContext context, BlogCategory category) {
  Navigator.push(
    context,
    MaterialPageRoute(
      builder: (context) => CategoryListPage(category: category.name),
    ),
  );
}

Widget buildEmpty() {
  return Center(
    child: Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Text('暂无数据', style: TextStyle(fontSize: 16, color: Colors.grey)),
      ],
    ),
  );
}