import 'package:blog_app/layout/drawer.dart';
import 'package:blog_app/layout/menu.dart';
import 'package:blog_app/pages/about_page.dart';
import 'package:blog_app/pages/blog_page.dart';
import 'package:blog_app/pages/category_page.dart';
import 'package:blog_app/pages/settings_page.dart';
import 'package:flutter/material.dart';

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  int _currentPageIndex = 0;
  late PageController _pageController;

  @override
  void initState() {
    super.initState();
    _pageController = PageController(initialPage: _currentPageIndex);
  }

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

  Widget _buildPageView() {
    return PageView(
      controller: _pageController,
      onPageChanged: (index) {
        setState(() {
          _currentPageIndex = index;
        });
      },
      children: [BlogPage(), CategoryPage(), SettingsPage(), AboutPage()],
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(
          pages[_currentPageIndex].title,
          style: TextStyle(color: Colors.white),
        ),
        backgroundColor: Theme.of(context).colorScheme.primary,
        elevation: 0,
        leading: Builder(
          builder:
              (context) => IconButton(
                icon: Icon(Icons.menu, color: Colors.white),
                onPressed: () => Scaffold.of(context).openDrawer(),
              ),
        ),
        actions: [
          IconButton(
            icon: Icon(Icons.search, color: Colors.white),
            onPressed: () {},
          ),
        ],
      ),
      drawer: _buildDrawer(),
      body: Padding(padding: EdgeInsets.all(10), child: _buildPageView()),
    );
  }

  void onTapDrawerItem(int index) {
    setState(() {
      _currentPageIndex = index;
    });
    _pageController.animateToPage(
      index,
      duration: Duration(milliseconds: 300),
      curve: Curves.easeInOut,
    );
    Navigator.pop(context);
  }

  Widget _buildDrawerBody() {
    return ListView(
      padding: EdgeInsets.zero,
      children: [
        ...List.generate(
          pages.length,
          (index) => buildDrawerItem(
            context: context,
            page: pages[index],
            isSelected: index == _currentPageIndex,
            onTap: () => onTapDrawerItem(index),
          ),
        ),
      ],
    );
  }

  Widget _buildDrawer() {
    return Drawer(
      child: Container(
        color: Colors.white,
        child: Column(
          children: [
            // 抽屉头部
            buildDrawerHeader(context),
            // 菜单项列表
            Expanded(child: _buildDrawerBody()),
          ],
        ),
      ),
    );
  }
}