import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;

void main() {
  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      debugShowCheckedModeBanner: false,
      home: RawAutoCompleteExample(),
    );
  }
}

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

  @override
  State<RawAutoCompleteExample> createState() => _RawAutoCompleteExampleState();
}

class _RawAutoCompleteExampleState extends State<RawAutoCompleteExample> {
  final _controller = TextEditingController();
  final _focusNode = FocusNode();

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: SizedBox(
          width: 350,
          child: RawAutocomplete<String>(
            textEditingController: _controller,
            focusNode: _focusNode,
            fieldViewBuilder: _fieldViewBuilder,
            optionsViewBuilder: _optionsViewBuilder,
            optionsBuilder: _searchLocation,
          ),
        ),
      ),
    );
  }

  Widget _fieldViewBuilder(
      BuildContext context, controller, focusNode, onSubmit) {
    return AnimatedContainer(
      duration: const Duration(milliseconds: 150),
      height: 40,
      alignment: Alignment.center,
      padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 8),
      constraints: const BoxConstraints(minHeight: 40),
      decoration: BoxDecoration(
        color: Colors.transparent,
        borderRadius: BorderRadius.circular(8),
        border: Border.all(
          width: 1,
          color: Colors.grey,
        ),
      ),
      child: TextField(
        controller: controller,
        focusNode: focusNode,
        maxLines: 1,
        decoration: const InputDecoration(
          isCollapsed: true,
          floatingLabelBehavior: FloatingLabelBehavior.never,
          alignLabelWithHint: true,
          border: InputBorder.none,
        ),
      ),
    );
  }

  Widget _optionsViewBuilder(BuildContext context,
      void Function(String) onSelect, Iterable<String> options) {
    return Align(
      alignment: Alignment.topLeft,
      child: Material(
        child: Container(
          margin: const EdgeInsets.only(top: 7),
          height: (40.0 * (options.length > 4 ? 4 : options.length)) + 16,
          width: 350,
          padding: const EdgeInsets.all(8),
          clipBehavior: Clip.antiAlias,
          decoration: ShapeDecoration(
            color: Colors.white,
            shape: RoundedRectangleBorder(
              side: const BorderSide(
                width: 1,
                color: Colors.grey,
              ),
              borderRadius: BorderRadius.circular(12),
            ),
            shadows: const [
              BoxShadow(
                color: Color(0x19000000),
                blurRadius: 8,
                offset: Offset(0, 4),
                spreadRadius: 0,
              )
            ],
          ),
          child: ListView(
            children: options
                .map((option) => GestureDetector(
                      onTap: () => onSelect(option),
                      child: AnimatedContainer(
                        height: 40,
                        alignment: Alignment.centerLeft,
                        decoration: BoxDecoration(
                            color: Colors.white.withOpacity(0),
                            borderRadius: BorderRadius.circular(24)),
                        duration: const Duration(milliseconds: 150),
                        padding: const EdgeInsets.symmetric(horizontal: 16),
                        child: Text(
                          option.toString(),
                        ),
                      ),
                    ))
                .toList(),
          ),
        ),
      ),
    );
  }

  Future<List<String>> _searchLocation(TextEditingValue keyword) async {
    final response = await http.get(Uri.parse(
        'https://dev-gateway.digitalhire.com/v1/recruitment/static-listing/locations?search=${keyword.text}&page=1&pageSize=5000'));

    if (response.statusCode == 200) {
      List<dynamic> data = json.decode(response.body);
      return [
        keyword.text,
        ...data
            .map((e) => '${e["city"] as String?}, ${e["state"] as String?}')
            .toList()
      ];
    } else {
      throw Exception('Failed to load data');
    }
  }
}