ilyalehchylin/educats-xamarin

using EduCATS.Controls.Pickers;
using EduCATS.Controls.RoundedListView;
using EduCATS.Fonts;
using EduCATS.Helpers.Forms;
using EduCATS.Helpers.Forms.Styles;
using EduCATS.Networking;
using EduCATS.Networking.Models.SaveMarks;
using EduCATS.Networking.Models.SaveMarks.LabSchedule;
using EduCATS.Networking.Models.SaveMarks.Practicals;
using EduCATS.Pages.SaveLabsAndPracticeMarks.Views;
using EduCATS.Pages.Statistics.Marks.Views.ViewCells;
using EduCATS.Pages.Statistics.Students.Models;
using EduCATS.Pages.Statistics.Students.Views.ViewCells;
using EduCATS.Themes;
using Newtonsoft.Json;
using Nyxbull.Plugins.CrossLocalization;
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
using Xamarin.Forms;

namespace EduCATS.Pages.SaveLabsAndPracticeMarks.ViewModels
{
    public class SavePracticeAndLabsPageView : ContentPage
    {
        static Thickness _padding = new Thickness(10, 1);
        static Thickness _headerPadding = new Thickness(0, 10, 0, 10);

        private string _groupName;

        public PlatformServices services = new PlatformServices();
        public string _title { get; set; }
        public LabsVisitingList practicMarksList;
        public LabsVisitingList labMarksList;

        public SavePracticeAndLabsPageView(string title, int subjectId, int groupId, string groupName)
        {
            _title = title;
            _groupName = groupName;
            var httpContent = new StringContent("", Encoding.UTF8, "application/json");
            ServicePointManager.ServerCertificateValidationCallback += (sender, certificate, chain, sslPolicyErrors) => { return true; };
            BackgroundColor = Color.FromHex(Theme.Current.AppBackgroundColor);
            Padding = _padding;
            NavigationPage.SetHasNavigationBar(this, false);
            if (_title == CrossLocalization.Translate("practice_mark"))
            {
                string link = Links.GetParticialsMarks;
                var groupItems = new GroupAndSubjModel();
                groupItems.GroupId = groupId;
                groupItems.SubjectId = subjectId;
                var body = JsonConvert.SerializeObject(groupItems);
                httpContent = new StringContent(body, Encoding.UTF8, "application/json");
                var obj = requestDataAsync(link, httpContent);
                practicMarksList = JsonConvert.DeserializeObject<LabsVisitingList>(obj.Result.ToString());
                BindingContext = new SavePracticeAndLabsPageViewModel(new PlatformServices(), subjectId, practicMarksList, groupId, title);
                createViews();
            }
            else if (_title == CrossLocalization.Translate("stats_page_labs_rating"))
            {
                string link = Links.GetLabsCalendarData + "subjectId=" + subjectId + "&groupId=" + groupId;
                var obj = requestDataAsync(link, httpContent);
                labMarksList = JsonConvert.DeserializeObject<LabsVisitingList>(obj.Result.ToString());
                BindingContext = new SavePracticeAndLabsPageViewModel(new PlatformServices(), subjectId, labMarksList, groupId, title);
                createLabsMarks();
            }

        }

        void createLabsMarks()
        {
            var group = new Label
            {
                TextColor = Color.FromHex(Theme.Current.StatisticsDetailsTitleColor),
                Style = AppStyles.GetLabelStyle(),
                Font = Font.SystemFontOfSize(NamedSize.Large),
                Text = CrossLocalization.Translate("choose_group") + " " + _groupName,
                HorizontalOptions = LayoutOptions.Center,
            };

            var stackLayout = new StackLayout();
            var resultsListViewSubGroup = new RoundedListView(typeof(StudentsPageViewCell));
            var subGroup = subGroupPicker();
            resultsListViewSubGroup = new RoundedListView(typeof(StudentsPageViewCell))
            {
                IsPullToRefreshEnabled = false,
            };
            resultsListViewSubGroup.ItemTapped += (sender, e) => ((RoundedListView)sender).SelectedItem = null;
            resultsListViewSubGroup.ItemsSource = labMarksList.Students;
            resultsListViewSubGroup.SetBinding(RoundedListView.SelectedItemProperty, "SelectedItem");
            resultsListViewSubGroup.SetBinding(ItemsView<Cell>.ItemsSourceProperty, "LabsVisitingMarksSubGroup");
            stackLayout = new StackLayout
            {
                VerticalOptions = LayoutOptions.Center,
                Padding = _headerPadding,
                Children =
                {
                        group,
                        subGroup,
                        resultsListViewSubGroup,
                }
            };

            Content = stackLayout;
        }

        void createViews()
        {
            var roundedListView = createRoundedListView();
            Content = roundedListView;
        }

        private async Task<object> requestDataAsync(string link, HttpContent _postContent)
        {
            var client = new HttpClient();
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(services.Preferences.AccessToken);
            if (_title == CrossLocalization.Translate("practice_mark"))
            {
                var responce = client.PostAsync(Servers.EduCatsByAddress + link, _postContent).Result;
                var result = await responce.Content.ReadAsStringAsync();
                return result;
            }
            else
            {
                var responce = client.GetAsync(Servers.EduCatsByAddress + link).Result;
                var result = await responce.Content.ReadAsStringAsync();
                return result;
            }
        }

        Picker subGroupPicker()
        {
            var subGroupPicker = new Picker
            {
                BackgroundColor = Color.White,
                HeightRequest = 70,
            };
            subGroupPicker.SetBinding(Picker.ItemsSourceProperty, "SubGroup");
            subGroupPicker.SetBinding(Picker.SelectedItemProperty, new Binding("SelectedSubGroup"));
            return subGroupPicker;
        }

        RoundedListView createRoundedListView()
        {
            var roundedListView = new RoundedListView(typeof(StudentsPageViewCell))
            {
                IsPullToRefreshEnabled = false
            };
            roundedListView.ItemTapped += (sender, e) => ((RoundedListView)sender).SelectedItem = null;
            roundedListView.SetBinding(RoundedListView.SelectedItemProperty, "SelectedItem");
            roundedListView.SetBinding(ItemsView<Cell>.ItemsSourceProperty, "Students");
            return roundedListView;
        }
    }
}