import 'package:azlistview/azlistview.dart';
import 'package:flutter/material.dart';
import 'package:lpinyin/lpinyin.dart';
import 'package:sweet_chat_app/apis/user_api.dart';
import 'package:sweet_chat_app/models/contact_info.dart';
import 'package:sweet_chat_app/models/user.dart';
import 'package:sweet_chat_app/utils/sp_utils.dart';

import 'chat_page.dart';

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

  @override
  State<ContactsPage> createState() => _ContactsPageState();
}

class _ContactsPageState extends State<ContactsPage> {
  List<ContactInfo> contactList = [];

  @override
  void initState() {
    super.initState();

    _loadFriends();
  }

  Future<void> _loadFriends() async {
    final userId = SpUtil.getInt('userId') ?? 0;
    final friendList = await getUserFriendsApi(userId);

    setState(() {
      _handleList(friendList);
    });
  }

  void _handleList(List<User> friends) {
    contactList =
        friends.map((user) {
          final pinyin = PinyinHelper.getPinyinE(user.nickname);
          final tag = pinyin.substring(0, 1).toUpperCase();

          return ContactInfo(
            id: user.id,
            name: user.nickname,
            avatar: user.avatarUrl,
            tagIndex: RegExp(r'^[A-Z]$').hasMatch(tag) ? tag : '#',
            namePinyin: pinyin,
          );
        }).toList();

    SuspensionUtil.sortListBySuspensionTag(contactList);
    SuspensionUtil.setShowSuspensionStatus(contactList);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.transparent,
      appBar: _buildAppBar(),
      body: Column(
        children: [_buildSearchBar(), Expanded(child: _buildAzListView())],
      ),
    );
  }

  PreferredSizeWidget _buildAppBar() {
    return AppBar(
      automaticallyImplyLeading: false,
      backgroundColor: Color(0xFF120D25),
      elevation: 0,
      centerTitle: true,
      title: const Text(
        '通讯录',
        style: TextStyle(
          fontSize: 18,
          fontWeight: FontWeight.w600,
          color: Colors.white,
        ),
      ),
    );
  }

  Widget _buildAzListView() {
    return AzListView(
      data: contactList,
      itemCount: contactList.length,
      itemBuilder: (_, index) {
        final contact = contactList[index];
        return ListTile(
          leading: CircleAvatar(
            backgroundImage: NetworkImage(contact.avatar),
            onBackgroundImageError: (_, __) {},
          ),
          title: Text(
            contact.name,
            style: const TextStyle(fontSize: 16, color: Colors.white),
          ),
          onTap: () => onTapContact(contact),
        );
      },
      susItemBuilder: (_, index) {
        final tag = contactList[index].getSuspensionTag();
        return Container(
          height: 28,
          padding: const EdgeInsets.symmetric(horizontal: 16),
          alignment: Alignment.centerLeft,
          color: const Color(0xFF2B2744),
          child: Text(
            tag,
            style: const TextStyle(fontSize: 13, color: Colors.grey),
          ),
        );
      },
      indexBarData: [...kIndexBarData],
      indexBarOptions: IndexBarOptions(
        textStyle: const TextStyle(fontSize: 12, color: Color(0xFF8E8E93)),
        selectItemDecoration: const BoxDecoration(
          shape: BoxShape.circle,
          color: Colors.green,
        ),
      ),
    );
  }

  Widget _buildSearchBar() {
    return Container(
      height: 44,
      decoration: BoxDecoration(color: Color(0xFF2F2A47)),
      child: TextField(
        textAlignVertical: TextAlignVertical.center,
        style: const TextStyle(color: Colors.white),
        decoration: InputDecoration(
          isDense: true,
          hintText: '搜索联系人',
          hintStyle: const TextStyle(fontSize: 15, color: Colors.white),
          prefixIcon: const Icon(Icons.search, size: 20, color: Colors.white),
          border: InputBorder.none,
        ),
      ),
    );
  }

  void onTapContact(ContactInfo contact) {
    Navigator.push(
      context,
      MaterialPageRoute(builder: (_) => ChatPage(contactInfo: contact, conversationId: 0)),
    );
  }
}