using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Threading.Tasks;
using comal.timesheets.Tasks;
using Comal.Classes;
using InABox.Clients;
using InABox.Configuration;
using InABox.Core;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using XF.Material.Forms.UI;
using XF.Material.Forms.UI.Dialogs;
using System.Threading;

namespace comal.timesheets
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class TasksList 
    {
        Color color = Color.FromHex("#15C7C1");
        int currentCategory = 0;
        bool searching = false;
        bool firstLoad = true;
        bool tapping = false;
        bool doubleTap = false;
        public TasksList()
        {
            InitializeComponent();
            LoadPreferences();
            searchEnt.IsEnabled = false;
            App.Data.Kanbans.Refresh(
                false,
                () => Device.BeginInvokeOnMainThread(DisplayList)
            );
        }

        private void LoadPreferences()
        {
            try
            {
                if (!App.Current.Properties.ContainsKey("ObserverPreference"))
                {
                    App.Current.Properties.Add("ObserverPreference", "True");
                    observerSwitch.IsToggled = true;
                }
                else
                {
                    observerSwitch.IsToggled = Convert.ToBoolean(App.Current.Properties["ObserverPreference"]);
                }
                if (!App.Current.Properties.ContainsKey("PromptedOnUsage"))
                {
                    App.Current.Properties.Add("PromptedOnUsage", "True");
                    DisplayAlert("One-time Prompt:", "Single Tap to Open Task," + System.Environment.NewLine + "Double Tap to Complete Task", "OK");
                }
            }
            catch { }
        }
        
        
        private void DisplayList()
        {
            App.Data.Kanbans.Search((shell) =>
            {
                bool bResult = true;
                bResult = bResult && (App.Current.Properties["ObserverPreference"].Equals("True") || !shell.IsObserver);
                bResult = bResult &&
                  currentCategory switch
                  {
                      0 => shell.Category == "To Do",
                      1 => shell.Category == "Current",
                      2 => shell.Category == "Waiting",
                      _ => false
                  };
                
                bResult = bResult && (
                    String.IsNullOrWhiteSpace(searchEnt.Text) 
                    || String.Equals(shell.Number.ToString(), searchEnt.Text)
                    || shell.ManagerName.ToUpper().Contains(searchEnt.Text.ToUpper())
                    || shell.Title.ToUpper().Contains(searchEnt.Text.ToUpper())
                    || shell.Summary.ToUpper().Contains(searchEnt.Text.ToUpper())
                    || shell.DueDate.ToString().Contains(searchEnt.Text)
                );
                
                return bResult;
            });
            searchEnt.IsEnabled = true;
            observerSwitch.IsEnabled = true;
            buttonToDo.Text = "To Do (" + App.Data.Kanbans.Items.Count(x => x.Category == "To Do") + ")";
            buttonCurrent.Text = "Current (" + App.Data.Kanbans.Items.Count(x => x.Category == "Current") + ")";
            buttonWaiting.Text = "Waiting (" + App.Data.Kanbans.Items.Count(x => x.Category == "Waiting") + ")";

        }
        
        private string ChooseCategory(string _category)
        {
            switch (_category)
            {
                case "Open":
                    _category = "To Do";
                    break;
                case "In Progress":
                    _category = "Current";
                    break;
                default:
                    break;
            }
            return _category;
        }

        private void AddTask_Clicked(object sender, EventArgs e)
        {
            try
            {
                AddEditTask addEditTask = new AddEditTask();
                Navigation.PushAsync(addEditTask);
            }
            catch { }
        }

        async void KanbanList_Tapped(object sender, EventArgs e)
        {
            try
            {
                if (tapping)
                {
                    doubleTap = true;
                    var selectedTask = taskListView.SelectedItem as KanbanShell;
                    if (selectedTask.Locked)
                    {
                        doubleTap = false;
                        DisplayAlert("Alert", "Unable to complete locked task", "Cancel");
                        return;
                    }
                    string chosenOption = await DisplayActionSheet("Complete Task?", "Cancel", null, "Yes", "No");
                    switch (chosenOption)
                    {
                        case "Cancel":
                            break;
                        case "No":
                            break;
                        case "Yes":
                            CompleteTask(selectedTask);
                            break;
                        default:
                            break;
                    }
                    doubleTap = false;
                }
                else
                {
                    tapping = true;
                    Timer t = new Timer(TimerCallBack, null, 750, Timeout.Infinite);
                }
            }
            catch { }
        }

        private async void CompleteTask(KanbanShell shell)
        {
            // try
            // {
            //     kanbanSubscriberShells.Remove(shell);
            //     RefreshButtons(kanbanSubscriberShells);
            //     DisplayList(kanbanSubscriberShells);
            //     await Task.Run(() =>
            //     {
            //         CoreTable table = new Client<Kanban>().Query
            //         (
            //             new Filter<Kanban>(x => x.ID).IsEqualTo(shell.ID),
            //             new Columns<Kanban>(x => x.ID, x => x.Category)
            //             );
            //         Kanban kanban = table.Rows.First().ToObject<Kanban>();
            //         kanban.Category = "Complete";
            //         new Client<Kanban>().Save(kanban, "Completed from mobile device");
            //     });
            // }
            // catch { }
        }

        private async void TimerCallBack(object o) //for single tap
        {
            try
            {
                tapping = false;
                if (!doubleTap)
                {
                    var selectedTask = taskListView.SelectedItem as KanbanShell;
                    string loadingMessage = "Loading Task " + selectedTask.Number;
                    if (selectedTask.Attachments != 0)
                    {
                        loadingMessage = loadingMessage + " with " + selectedTask.Attachments + " attached document(s). Please wait for photos to appear.";
                    }
                    Device.BeginInvokeOnMainThread(async () =>
                    {
                        using (await MaterialDialog.Instance.LoadingDialogAsync(message: loadingMessage))
                        {
                            Guid ID = selectedTask.ID;
                            var form = new AddEditTask(ID);
                            await Navigation.PushAsync(form);
                        }
                    });
                }
            }
            catch { }
        }


        private async void SearchEnt_Changed(object sender, EventArgs e)
        {
            DisplayList();
        }





        private void ButtonToDo_Clicked(object sender, EventArgs e)
        {
            currentCategory = 0;
            DisplayList();
            ChangeButtonColour();
        }

        private void ButtonCurrent_Clicked(object sender, EventArgs e)
        {
            currentCategory = 1;
            DisplayList();
            ChangeButtonColour();
        }

        private void ButtonWaiting_Clicked(object sender, EventArgs e)
        {
            currentCategory = 2;
            DisplayList();
            ChangeButtonColour();
        }

        private void ChangeButtonColour()
        {
            buttonToDo.BackgroundColor = currentCategory == 0 ? color : Color.Default;
            buttonCurrent.BackgroundColor = currentCategory == 1 ? color : Color.Default;
            buttonWaiting.BackgroundColor = currentCategory == 2 ? color : Color.Default;
        }

        private void ObserverSwitch_Toggled(object sender, EventArgs e)
        {
            if (firstLoad)
                return;
            if (observerSwitch.IsToggled)
            {
                if (App.Current.Properties.ContainsKey("ObserverPreference"))
                {
                    App.Current.Properties["ObserverPreference"] = "True";
                }
                else
                {
                    App.Current.Properties.Add("ObserverPreference", "True");
                }
            }
            else
            {
                if (App.Current.Properties.ContainsKey("ObserverPreference"))
                {
                    App.Current.Properties["ObserverPreference"] = "False";
                }
                else
                {
                    App.Current.Properties.Add("ObserverPreference", "False");
                }
            }
            DisplayList();
        }
    }
}