/*
 * MIT License
 * 
 * Copyright (c) 2017 Michael VanOverbeek and ShiftOS devs
 * 
 * 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 System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using ShiftOS.Objects.ShiftFS;
using static ShiftOS.Engine.SkinEngine;

namespace ShiftOS.Engine
{
    public class LauncherAttribute : Attribute
    {
        /// <summary>
        /// Marks this form as a launcher item that, when clicked, will open the form.
        /// </summary>
        /// <param name="name">The text displayed on the launcher item</param>
        /// <param name="requiresUpgrade">Whether or not an upgrade must be installed to see the launcher</param>
        /// <param name="upgradeID">The ID of the upgrade - leave blank if requiresUpgrade is false.</param>
        /// <param name="category">The category that the item will appear in.</param>
        public LauncherAttribute(string name, bool requiresUpgrade, string upgradeID = "", string category = "Other")
        {
            Category = category;
            Name = name;
            RequiresUpgrade = requiresUpgrade;
            ID = upgradeID;
        }

        public string Name { get; set; }
        public bool RequiresUpgrade { get; set; }
        public string ID { get; set; }
        public string Category { get; private set; }
        public bool UpgradeInstalled
        {
            get
            {
                if (!RequiresUpgrade)
                    return true;

                return Shiftorium.UpgradeInstalled(ID);
            }
        }
    }


    public interface IDesktop
    {
        string DesktopName { get; }
        
        void SetupDesktop();
        void PopulateAppLauncher(LauncherItem[] items);
        void ShowWindow(IWindowBorder border);
        void KillWindow(IWindowBorder border);
        void PopulatePanelButtons();
        void MinimizeWindow(IWindowBorder brdr);
        void MaximizeWindow(IWindowBorder brdr);
        void RestoreWindow(IWindowBorder brdr);
        void InvokeOnWorkerThread(Action act);
        Size GetSize();
    }

    public static class Desktop
    {
        private static IDesktop _desktop = null;

        public static IDesktop[] GetAllDesktops()
        {
            List<IDesktop> desktops = new List<IDesktop>();
            foreach(var exe in System.IO.Directory.GetFiles(Environment.CurrentDirectory))
            {
                if(exe.EndsWith(".exe") || exe.EndsWith(".dll"))
                {
                    try
                    {
                        var asm = Assembly.LoadFile(exe);
                        foreach(var type in asm.GetTypes())
                        {
                            if (type.GetInterfaces().Contains(typeof(IDesktop)))
                            {
                                desktops.Add(Activator.CreateInstance(type) as IDesktop);
                            }
                        }
                    }
                    catch { }
                }
            }
            return desktops.ToArray();
        }

        public static Size Size { get
            {
                return _desktop.GetSize();
            }
        }

        public static void Init(IDesktop desk)
        {
            _desktop = desk;
        }

        public static void MinimizeWindow(IWindowBorder brdr)
        {
            _desktop.MinimizeWindow(brdr);
        }

        public static void MaximizeWindow(IWindowBorder brdr)
        {
            _desktop.MaximizeWindow(brdr);
        }

        public static void RestoreWindow(IWindowBorder brdr)
        {
            _desktop.RestoreWindow(brdr);
        }


        public static void InvokeOnWorkerThread(Action act)
        {
            _desktop.InvokeOnWorkerThread(act);
        }

        public static void ResetPanelButtons()
        {
            _desktop.PopulatePanelButtons();
        }

        public static void ShowWindow(IWindowBorder brdr)
        {
            _desktop.ShowWindow(brdr);
        }

        public static void PopulateAppLauncher()
        {
            _desktop.PopulateAppLauncher(AppLauncherDaemon.Available().ToArray());
        }
    }

}