import 'dart:io';

import 'package:dio/dio.dart';
import 'package:dio/adapter.dart';
import 'package:dio_cookie_manager/dio_cookie_manager.dart';
import 'package:cookie_jar/cookie_jar.dart';
import 'package:path_provider/path_provider.dart';
import 'package:package_info/package_info.dart';

import 'enums.dart';

class Client {
    String endPoint;
    String type = 'unknown';
    Map<String, String> headers;
    Map<String, String> config;
    bool selfSigned;
    bool initialized = false;
    Dio http;
    PersistCookieJar cookieJar;

    Client({this.endPoint = 'https://appwrite.io/v1', this.selfSigned = false, Dio http}) : this.http = http ?? Dio() {
        
        type = (Platform.isIOS) ? 'ios' : type;
        type = (Platform.isMacOS) ? 'macos' : type;
        type = (Platform.isAndroid) ? 'android' : type;
        type = (Platform.isLinux) ? 'linux' : type;
        type = (Platform.isWindows) ? 'windows' : type;
        type = (Platform.isFuchsia) ? 'fuchsia' : type;
        
        this.headers = {
            'content-type': 'application/json',
            'x-sdk-version': 'appwrite:dart:0.2.3',
        };

        this.config = {};

        assert(endPoint.startsWith(RegExp("http://|https://")), "endPoint $endPoint must start with 'http'");
    }
    
    Future<Directory> _getCookiePath() async {
        final directory = await getApplicationDocumentsDirectory();
        final path = directory.path;
        final Directory dir = new Directory('$path/cookies');
        await dir.create();
        return dir;
    }

     /// Your project ID
    Client setProject(value) {
        config['project'] = value;
        addHeader('X-Appwrite-Project', value);
        return this;
    }

    Client setLocale(value) {
        config['locale'] = value;
        addHeader('X-Appwrite-Locale', value);
        return this;
    }

    Client setSelfSigned({bool status = true}) {
        selfSigned = status;
        return this;
    }

    Client setEndpoint(String endPoint) {
        this.endPoint = endPoint;
        this.http.options.baseUrl = this.endPoint;
        return this;
    }

    Client addHeader(String key, String value) {
        headers[key] = value;
        
        return this;
    }

    Future init() async {
        if(!initialized) {
          final Directory cookieDir = await _getCookiePath();

          cookieJar = new PersistCookieJar(dir:cookieDir.path);

          this.http.options.baseUrl = this.endPoint;
          this.http.options.validateStatus = (status) => status < 400;
          this.http.interceptors.add(CookieManager(cookieJar));

          PackageInfo packageInfo = await PackageInfo.fromPlatform();

          addHeader('Origin', 'appwrite-' + type + '://' + packageInfo.packageName);
        }
    }

    Future<Response> call(HttpMethod method, {String path = '', Map<String, String> headers = const {}, Map<String, dynamic> params = const {}}) async {
        if(selfSigned) {
            // Allow self signed requests
            (http.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate = (HttpClient client) {
                client.badCertificateCallback = (X509Certificate cert, String host, int port) => true;
                return client;
            };
        }

        await this.init();

        // Origin is hardcoded for testing
        Options options = Options(
            headers: {...this.headers, ...headers},
            method: method.name(),
        );

        if(headers['content-type'] == 'multipart/form-data') {
            return http.request(path, data: FormData.fromMap(params), options: options);
        }

        if (method == HttpMethod.get) {
            return http.get(path, queryParameters: params, options: options);
        } else {
            return http.request(path, data: params, options: options);
        }
    }
}