import 'dart:io';
import 'dart:async';
import 'dart:convert';
import 'package:http/http.dart' as http;

import 'package:meta/meta.dart';

enum ImaginiState { unknown, authenticated, unauthenticated }

class ImaginiAPI{
  String _server, _accessToken, _refreshToken;
  final _controller = StreamController<ImaginiState>();

  ImaginiAPI({
    @required String server,
    String accessToken,
    String refreshToken
  }) {
    _server = server;
    _accessToken = accessToken;
    _refreshToken = refreshToken;
  }

  Stream<ImaginiState> get status async* {
    await Future<void>.delayed(const Duration(seconds: 1));
    yield ImaginiState.unauthenticated;
    yield* _controller.stream;
  }

  // Endpoint: /api/v1/Login
  Future<void> login([
    String username,
    String password,
  ]) async {
    assert(
      (username != null && password != null) ||
      (_accessToken != null && _refreshToken != null)
    );

    http.Response response = await http.post(
      Uri.encodeFull(_server + "/api/v1/Login"),
      body: jsonEncode(<String, String>{
          'user': username,
          'password': password,
      }),
    ).timeout(Duration(seconds: 10));

    if (response.statusCode != 200) {
      // Fuck
      return;
    }

   // Success
   String setCookieVal = response.headers["set-cookie"];
   List<Cookie> allCookies = setCookieVal.split(',')
     .map((cookie) => Cookie.fromSetCookieValue(cookie)).toList();

   Cookie accessToken = allCookies.firstWhere((cookie) => cookie.name == "AccessToken");
   Cookie refreshToken = allCookies.firstWhere((cookie) => cookie.name == "RefreshToken");

   _accessToken = accessToken.toString();
   _refreshToken = refreshToken.toString();

   _controller.add(ImaginiState.authenticated);

    print("Status: ${response.statusCode.toString()}");
    print("Body: ${response.body.toString()}");
    print("AccessToken: ${accessToken.toString()}");
    print("RefreshToken: ${refreshToken.toString()}");
  }

  void logout() {
    _controller.add(ImaginiState.unauthenticated);
  }

  Future<String> mediaItems([
    String startDate,
    String endDate,
    String albumID,
    List<String> tagID,
    String type,    // TODO: Make enum
    int page,
  ]) async {
    // Query:
    //    /api/v1/MediaItems
    // Derive Params:
    //    startDate:
    //       &createdAt=>2020-10-10T10:10:10
    //    endDate:
    //       &createdAt=<2020-10-10T10:10:10
    //    albumID:
    //       &albumID=9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d
    //    tagID:
    //       &tagID=9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d,9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d
    //    type:
    //       &type=Photos
    //       &type=Videos
    //    page:
    //       &page=4

    // Returns:
    //    {
    //    
    //    }

    return null;
  }
  
  Future<String> tags([
    int page
  ]) async {
    // Query:
    //    /api/v1/Tags
    // Derive Params:
    //    page:
    //       &page=4
    return null;
  }
  
  Future<String> albums([
    int page
  ]) async {
    // Query:
    //    /api/v1/Albums
    // Derive Params:
    //    page:
    //       &page=4
    return null;
  }
  
  Future<String> me() async {
    return null;
  }

  void dispose() => _controller.close();
}