import 'package:flutter/material.dart';
import 'package:superport/models/company_model.dart';
import 'package:superport/models/user_model.dart';
import 'package:superport/screens/common/theme_tailwind.dart';
import 'package:superport/screens/common/main_layout.dart';
import 'package:superport/screens/common/custom_widgets.dart';
import 'package:superport/services/mock_data_service.dart';
import 'package:superport/utils/constants.dart';
import 'package:superport/screens/user/controllers/user_list_controller.dart';
import 'package:superport/screens/user/widgets/user_table.dart';
import 'package:superport/utils/user_utils.dart';
import 'package:superport/screens/common/widgets/pagination.dart';

// 담당자 목록 화면 (UI만 담당)
class UserListScreen extends StatefulWidget {
  const UserListScreen({super.key});

  @override
  State<UserListScreen> createState() => _UserListScreenState();
}

class _UserListScreenState extends State<UserListScreen> {
  late final UserListController _controller;
  final MockDataService _dataService = MockDataService();
  // 페이지네이션 상태 추가
  int _currentPage = 1;
  final int _pageSize = 10;

  @override
  void initState() {
    super.initState();
    _controller = UserListController(dataService: _dataService);
    _controller.loadUsers();
    _controller.addListener(_refresh);
  }

  @override
  void dispose() {
    _controller.removeListener(_refresh);
    super.dispose();
  }

  // 상태 갱신용 setState 래퍼
  void _refresh() {
    setState(() {});
  }

  // 사용자 추가 화면 이동
  void _navigateToAddScreen() async {
    final result = await Navigator.pushNamed(context, '/user/add');
    if (result == true) {
      _controller.loadUsers();
    }
  }

  // 사용자 수정 화면 이동
  void _navigateToEditScreen(int id) async {
    final result = await Navigator.pushNamed(
      context,
      '/user/edit',
      arguments: id,
    );
    if (result == true) {
      _controller.loadUsers();
    }
  }

  // 사용자 삭제 다이얼로그
  void _showDeleteDialog(int id) {
    showDialog(
      context: context,
      builder:
          (context) => AlertDialog(
            title: const Text('삭제 확인'),
            content: const Text('이 사용자 정보를 삭제하시겠습니까?'),
            actions: [
              TextButton(
                onPressed: () => Navigator.pop(context),
                child: const Text('취소'),
              ),
              TextButton(
                onPressed: () {
                  _controller.deleteUser(id, () {
                    Navigator.pop(context);
                  });
                },
                child: const Text('삭제'),
              ),
            ],
          ),
    );
  }

  // 회사명 반환 함수 (내부에서만 사용)
  String _getCompanyName(int companyId) {
    final company = _dataService.getCompanyById(companyId);
    return company?.name ?? '-';
  }

  @override
  Widget build(BuildContext context) {
    // 대시보드 폭에 맞게 조정
    final screenWidth = MediaQuery.of(context).size.width;
    final maxContentWidth = screenWidth > 1200 ? 1200.0 : screenWidth - 32;

    // 페이지네이션 데이터 슬라이싱
    final int totalCount = _controller.users.length;
    final int startIndex = (_currentPage - 1) * _pageSize;
    final int endIndex =
        (startIndex + _pageSize) > totalCount
            ? totalCount
            : (startIndex + _pageSize);
    final pagedUsers = _controller.users.sublist(startIndex, endIndex);

    return MainLayout(
      title: '담당자 관리',
      currentRoute: Routes.user,
      actions: [
        IconButton(
          icon: const Icon(Icons.refresh),
          onPressed: _controller.loadUsers,
          color: Colors.grey,
        ),
      ],
      child: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            PageTitle(
              title: '담당자 목록',
              width: maxContentWidth - 32,
              rightWidget: ElevatedButton.icon(
                onPressed: _navigateToAddScreen,
                icon: const Icon(Icons.add),
                label: const Text('추가'),
                style: AppThemeTailwind.primaryButtonStyle,
              ),
            ),
            Expanded(
              child: DataTableCard(
                width: maxContentWidth - 32,
                child: UserTable(
                  users: pagedUsers,
                  width: maxContentWidth - 32,
                  getRoleName: getRoleName,
                  getBranchName: _controller.getBranchName,
                  getCompanyName: _getCompanyName,
                  onEdit: _navigateToEditScreen,
                  onDelete: _showDeleteDialog,
                ),
              ),
            ),
            // 페이지네이션 위젯 추가
            if (totalCount > _pageSize)
              Padding(
                padding: const EdgeInsets.symmetric(vertical: 12),
                child: Pagination(
                  totalCount: totalCount,
                  currentPage: _currentPage,
                  pageSize: _pageSize,
                  onPageChanged: (page) {
                    setState(() {
                      _currentPage = page;
                    });
                  },
                ),
              ),
          ],
        ),
      ),
    );
  }
}