/// Version 1.0.0
/// Last modified 24.5.2014
///
/// Copyright (C) 2014 Atte Söderlund
///
/// Halyri-system is a prototype emergency call system. Its purpose is to
/// demonstrate the use of the advanced capabilities available in the current
/// generation smartphones in facilitating the emergency service dispatcher's
/// capability to determine the nature of the emergency and to dispatch help.
///
/// For more information, see the README file of this package.
///
/// The MIT License (MIT)
///
/// Permission is hereby granted, free of charge, to any person obtaining a copy
/// of this software and associated documentation files (the "Software"), to
/// deal in the Software without restriction, including without limitation the
/// rights to use, copy, modify, merge, publish, distribute, sublicense,
/// and/or sell copies of the Software, and to permit persons to whom the
/// Software is furnished to do so, subject to the following conditions:
///
/// The above copyright notice and this permission notice shall be included in
/// all copies or substantial portions of the Software.
///
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
/// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
/// IN THE SOFTWARE.
///

using Microsoft.Maps.MapControl.WPF;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Hake_WPF
{
    /// <author>Atte Söderlund</author>
    /// <summary>
    /// The class controls the maps. A User can add a specific pushpin to the maps or 
    /// add all pushpins to the map again. The user can add maps and also center the maps.
    /// It also handles closing the maps.
    /// </summary>
    class MapController
    {
        private MapWindow mapWindow;
        private ObservableCollection<Pushpin> pushpins = new ObservableCollection<Pushpin>();
        private ObservableCollection<Map> maps = new ObservableCollection<Map>();

        /// <summary>
        /// Invoked when MapWindow is closing. It is used to tell that map window is closed.
        /// </summary>
        public delegate void MapWindowClosing();
        /// <summary>
        /// This event is sent when MapWindow is closing.
        /// </summary>
        public event MapWindowClosing MapWindowClosingEvent;

        /// <summary>
        /// The function is constructor. It does nothing.
        /// </summary>
        public MapController()
        {
        }

        /// <summary>
        /// The function removes all pushpins from the given map and then adds pushins from 
        /// the given collection to the map.
        /// </summary>
        /// <param name="map">The given map.</param>
        /// <param name="collection">The collection that contains Assigments.</param>
        private void AddPushPinsToMap(Map map, ObservableCollection<Assignment> collection)
        {
            map.Children.Clear();
            for (int i = 0; i < collection.Count; i++)
                foreach (Pushpin pushpin in collection[i].Pushpins)
                    if (pushpin != null)
                        map.Children.Add(new Pushpin()
                        {
                            Location = pushpin.Location,
                            Background = pushpin.Background
                        });
        }

        /// <summary>
        /// The function adds the given map to the maps collection.
        /// </summary>
        /// <param name="map">The given map.</param>
        public void AddMap(Map map)
        {
            maps.Add(map);
        }

        /// <summary>
        /// The function makes a new map window and adds that map to the maps collections. 
        /// Then it adds pushpins to the maps and adds event handler for the map window closing.
        /// </summary>
        /// <param name="assignments">The list of assignments for puhspins to be added.</param>
        public void MapToOwnWindow(ObservableCollection<Assignment> assignments)
        {
            mapWindow = new MapWindow(maps[0].Center, (int)maps[0].ZoomLevel);
            mapWindow.Show();
            maps.Add(mapWindow.Map);
            AddPushPinsToMap(maps.Last(), assignments);
            mapWindow.Closing += mapWindow_Closing;
        }

        /// <summary>
        /// The function removes the given map and then removes the event handler for map window closing.
        /// </summary>
        void mapWindow_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            maps.Remove(mapWindow.Map);
            if (MapWindowClosingEvent != null)
                MapWindowClosingEvent();
        }

        /// <summary>
        /// The function closes the map window if it is open.
        /// </summary>
        public void Close()
        {
            if (mapWindow != null)
                mapWindow.Close();
        }

        /// <summary>
        /// The function adds puhspins to all maps.
        /// </summary>
        /// <param name="assignments">The list of assignmets that contains pushpins.</param>
        public void AddAllPushpins(ObservableCollection<Assignment> assignments)
        {
            foreach (Map map in maps)
                AddPushPinsToMap(map, assignments);
        }

        /// <summary>
        /// The function centers all maps to the assignments location.
        /// </summary>
        /// <param name="assignment">The assignment that contains location.</param>
        public void CenterMaps(Assignment assignment)
        {
            foreach (Map map in maps)
                if (assignment.Location != null)
                    map.Center = new Location() {
                        Latitude = assignment.Location.Latitude, 
                        Longitude = assignment.Location.Longitude 
                    };
        }
    }
}