import 'dart:async';
import 'dart:convert';

import 'package:http/http.dart';
import 'package:uuid/uuid.dart';

class GooglePlacesService {
  final sessionToken = Uuid().v4();
  final apiKey = "AIzaSyBCjMCEAyyNVpsnVYvZj6VL1mmB98Vd6AE";
  final client = Client();

  void finish() {
    client.close();
  }

  Future<List<Suggestion>?> fetchSuggestions(String input, String lang) async {
    var headers = {
      'Content-Type': 'application/json',
      'X-Goog-Api-Key': apiKey,
      "Access-Control-Allow-Origin": "*",
      'X-Goog-FieldMask':
          'places.displayName,places.id,places.formattedAddress,places.photos'
    };
    var request = Request('POST',
        Uri.parse('https://places.googleapis.com/v1/places:searchText'));
    request.body = json.encode({"textQuery": input});
    request.headers.addAll(headers);

    StreamedResponse response = await request.send();

    if (response.statusCode == 200) {
      final result = json.decode(await response.stream.bytesToString());

      if (result.isNotEmpty) {
        return result['places']
            .map<Suggestion>((p) => Suggestion(
                placeId: p['id'],
                description: p['displayName']['text'],
                address: p['formattedAddress'],
                imageReferences: p['photos']))
            .toList();
      } else {
        return null;
      }
    } else {
      throw Exception(response.reasonPhrase);
    }
  }

  Future fetchPhoto(String name) async {
    var headers = {
      "Access-Control-Allow-Origin": "*",
    };

    var request = Request('GET',
      Uri.parse('https://places.googleapis.com/v1/$name/media?key=$apiKey&maxWidthPx=800&skipHttpRedirect=true')
    );
    request.headers.addAll(headers);

    StreamedResponse response = await request.send();

    if (response.statusCode == 200) {
      final result = json.decode(await response.stream.bytesToString());

      if (result.isNotEmpty) {
        return result;
      } else {
        return null;
      }
    } else {
      throw Exception(response.reasonPhrase);
    }
  }
}

class Suggestion {
  final String placeId;
  final String description;
  final String address;
  final List<dynamic>? imageReferences;

  Suggestion(
      {required this.placeId,
      required this.description,
      required this.address,
      this.imageReferences});

  @override
  String toString() {
    return 'Suggestion(description: $description, placeId: $placeId)';
  }

  Map toJson() => {
        'placeId': placeId,
        'name': description,
        'address': address,
        'imageReferences': imageReferences
      };
}