// Copyright (c) 2023 schick Informatik
// Description: Bremen calling main window
// 

using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

using BreCalClient.misc.Api;
using BreCalClient.misc.Client;
using BreCalClient.misc.Model;

namespace BreCalClient
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private const int SHIPCALL_UPDATE_INTERVAL_SECONDS = 30;
        private DefaultApi _api;
        private ObservableCollection<ShipcallControlModel> _controlModels = new();
        private List<Ship> _ships = new();
        private ConcurrentDictionary<int, Ship> _shipLookupDict = new();
        private List<Berth> _berths = new();
        private ConcurrentDictionary<int, Berth> _berthLookupDict = new();
        private List<Participant> _participants = new();
        private Dictionary<int, Participant> _participantLookupDict = new();
        private CancellationTokenSource _tokenSource = new CancellationTokenSource();

        public MainWindow()
        {
            InitializeComponent();
            _api = new DefaultApi();
            _api.Configuration.ApiKeyPrefix["Authorization"] = "Bearer";
        }

        #region event handler

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            
        }

        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            _tokenSource.Cancel();
        }

        private async void buttonLogin_Click(object sender, RoutedEventArgs e)
        {
            if (string.IsNullOrEmpty(this.textPassword.Password) || string.IsNullOrEmpty(this.textUsername.Text))
            {
                this.labelLoginResult.Content = Application.Current.FindResource("textUserNamePasswordEmpty").ToString();
                return;
            }

            Credentials credentials = new(username: textUsername.Text.Trim(), 
                password: textPassword.Password.Trim());

            try
            {
                LoginResult loginResult = await _api.LoginPostAsync(credentials);
                if(loginResult != null)
                {
                    if(loginResult.Id > 0)
                    {
                        this.busyIndicator.IsBusy = false;
                        this._api.Configuration.ApiKey["Authorization"] = loginResult.Token;
                        this.LoadStaticLists();
                    }
                }
            }
            catch (ApiException ex)
            {
                this.labelLoginResult.Content = ex.Message;
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
            }
        }

        private void buttonExit_Click(object sender, RoutedEventArgs e)
        {
            this.Close();
        }

        #endregion

        #region private methods

        private async void LoadStaticLists()
        {
            this._berths = await _api.BerthsGetAsync();
            foreach(var berth in this._berths)
                _berthLookupDict[berth.Id] = berth;
            this.searchFilterControl.SetBerths(this._berths);
            this._ships = await _api.ShipsGetAsync();
            foreach(var ship in this._ships)
                _shipLookupDict[ship.Id] = ship;
            this._participants = await _api.ParticipantGetAsync();
            List<Participant> agencies = new List<Participant>();
            foreach (Participant participant in this._participants)
            {
                this._participantLookupDict[participant.Id] = participant;
                
            }
            _ = Task.Run(() => RefreshShipcalls());
        }
        

        public async Task RefreshShipcalls()
        {
            while (!_tokenSource.Token.IsCancellationRequested)
            {
                List<Shipcall> shipcalls = await _api.ShipcallsGetAsync();
                foreach (Shipcall shipcall in shipcalls)
                {
                    ShipcallControlModel? selectedSCMModel = null;

                    foreach(ShipcallControlModel scm in this._controlModels)
                    {
                        if(scm.Shipcall?.Id == shipcall.Id)
                        {
                            selectedSCMModel = scm;
                            break;
                        }
                    }

                    if(selectedSCMModel != null)
                    {
                        selectedSCMModel.Shipcall = shipcall;
                        
                    }
                    else                    
                    {
                        // no: create new entry
                        ShipcallControlModel scm = new ShipcallControlModel();
                        scm.Shipcall = shipcall;
                        if (this._shipLookupDict.ContainsKey(shipcall.ShipId))
                            scm.Ship = this._shipLookupDict[shipcall.ShipId];
                        _controlModels.Add(scm);
                        this.Dispatcher.Invoke(new Action(() =>
                        {
                            ShipcallControl sc = new ShipcallControl();
                            sc.Height = 80;
                            sc.ShipcallControlModel = scm;
                            sc.TimesRequested += Sc_TimesRequested;
                            sc.EditRequested += Sc_EditRequested;
                            this.stackPanel.Children.Add(sc);
                        }));
                    }                                        
                }

                // test for deletion, anything in the display that is not in the lookup result
                foreach(ShipcallControlModel scm in this._controlModels)
                {
                    
                }


                await Task.Delay(TimeSpan.FromSeconds(SHIPCALL_UPDATE_INTERVAL_SECONDS), _tokenSource.Token);
            }
        }

        private void Sc_EditRequested(ShipcallControl obj)
        {
            // TODO: get the shipcall from the control and show the edit control

        }

        private void Sc_TimesRequested(ShipcallControl obj)
        {
            // TODO: get the shipcall, load and show a list of the times

        }


        #endregion


    }
}