using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;

using Autodesk.Revit.UI;


using UIFramework;
using UIFrameworkServices;

namespace Sai.Toolkit.Revit.Helpers
{
    /// <summary>
    /// 通过命令id设置快捷键
    /// </summary>
	public class KeyboardShortcutService
	{
        /// <summary>
        /// 设置菜单快捷键
        /// </summary>
        /// <param name="id"></param>
        /// <param name="shortcutsRep"></param>
        /// <returns></returns>
		public bool SetRibbonItemShortcut(string id, string shortcutsRep)
		{
			Dictionary<string, UIFrameworkServices.ShortcutItem> dictionary = this.LoadShortcuts();
            if (this.Commands.TryGetValue(id, out UIFrameworkServices.ShortcutItem shortcutItem))
            {
                shortcutItem.ShortcutsRep = shortcutsRep;
                shortcutItem.Shortcuts.Clear();
                //多个快捷键中间以#分割
                foreach (string text in shortcutsRep.Split('#'))
                {
                    shortcutItem.Shortcuts.Add(text);
                }
                dictionary.Add(id, shortcutItem);
                List<UIFrameworkServices.ShortcutItem> list = dictionary.Select((KeyValuePair<string, UIFrameworkServices.ShortcutItem> e) => e.Value).ToList<UIFrameworkServices.ShortcutItem>();
                this.SaveShortcuts(list);
                this.ArmCommands();
                return true;
            }
            return false;
		}
        /// <summary>
        /// 通过外部命令类设置快捷键
        /// </summary>
        /// <param name="id"></param>
        /// <param name="shortcutsRep"></param>
        /// <returns></returns>
		public bool SetRibbonItemShortcut<T>() where T :IExternalCommand
        {
            var attribute=typeof(T).GetCustomAttribute<ShortcutRepAttribute>();
            if (attribute==null)
            {
                return false;
            }
            Dictionary<string, UIFrameworkServices.ShortcutItem> dictionary = this.LoadShortcuts();
            foreach (var item in Commands)
            {
                if (item.Key.EndsWith(nameof(T)))
                {
                    ShortcutItem shortcutItem = item.Value;
                    shortcutItem.ShortcutsRep = attribute.Shortcuts;
                    shortcutItem.Shortcuts.Clear();
                    //多个快捷键中间以#分割
                    foreach (string text in attribute.Shortcuts.Split('#'))
                    {
                        shortcutItem.Shortcuts.Add(text);
                    }
                    dictionary.Add(item.Key, shortcutItem);
                    List<UIFrameworkServices.ShortcutItem> list = dictionary.Select((KeyValuePair<string, UIFrameworkServices.ShortcutItem> e) => e.Value).ToList<UIFrameworkServices.ShortcutItem>();
                    this.SaveShortcuts(list);
                    this.ArmCommands();
                    return true;
                }
            }
            return false;
        }
        /// <summary>
        /// 移除菜单快捷键
        /// </summary>
        /// <param name="id">命令id</param>
        /// <returns></returns>
		public bool RemoveRibbonItemShortcut(string id)
		{
			Dictionary<string, UIFrameworkServices.ShortcutItem> dictionary = this.LoadShortcuts();
			UIFrameworkServices.ShortcutItem shortcutItem;
			if (dictionary.TryGetValue(id, out shortcutItem))
			{
				dictionary.Remove(id);
				List<UIFrameworkServices.ShortcutItem> list = dictionary.Select((KeyValuePair<string, UIFrameworkServices.ShortcutItem> e) => e.Value).ToList<UIFrameworkServices.ShortcutItem>();
				this.SaveShortcuts(list);
				this.ArmCommands();
				return true;
			}
			return false;
		}
        /// <summary>
        /// 是否具有菜单快捷键
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
		public bool HasRibbonItemShortcut(string id)
		{
			return this.LoadShortcuts().TryGetValue(id, out var _);
		}
        /// <summary>
        /// 获取快捷键的映射（最多五个按键）
        /// </summary>
        /// <param name="id">CommandId</param>
        /// <returns>快捷键</returns>
		public string GetRibbonItemShortcutsRep(string id)
		{
			if (this.LoadShortcuts().TryGetValue(id, out var shortcutItem))
			{
				return shortcutItem.ShortcutsRep;
			}
			return "";
		}
        /// <summary>
        /// 获取全部命令快捷键CommandId-ObservableCollect<string>()
        /// </summary>
        /// <returns></returns>
		public Dictionary<string, IEnumerable<string>> GetCommandShortcuts()
		{
			return (from e in this.Commands
				select e.Value into e
				group e by e.CommandId).ToDictionary((IGrouping<string, UIFrameworkServices.ShortcutItem> i) => i.Key, (IGrouping<string, UIFrameworkServices.ShortcutItem> j) => j.SelectMany((UIFrameworkServices.ShortcutItem i) => i.Shortcuts));
		}
        /// <summary>
        /// 获取自定义快捷键被关联到的命令CommandId
        /// </summary>
        /// <param name="shortcut">自定义的快捷键</param>
        /// <returns>CommandId</returns>
        public string GetCommandShortcut(string shortcut)
		{
			return this.Commands.FirstOrDefault((KeyValuePair<string, UIFrameworkServices.ShortcutItem> e) => e.Value.Shortcuts.Contains(shortcut)).Key;
		}
        /// <summary>
        /// 自定义的快捷键是否已经被关联到某个命令上
        /// </summary>
        /// <param name="shortcut">自定义的快捷键</param>
        /// <returns></returns>
		public bool HasCommandShortcut(string shortcut)
		{
			return this.GetCommandShortcuts().Any((KeyValuePair<string, IEnumerable<string>> e) => e.Value.Contains(shortcut));
		}
        /// <summary>
        /// 加载命令
        /// </summary>
		public void LoadCommands()
		{
			ShortcutsHelper.LoadCommands();
		}
        /// <summary>
        /// 应用快捷键更改
        /// </summary>
		public void ApplyShortcutChanges()
		{
            UIFrameworkServices.KeyboardShortcutService.applyShortcutChanges(this.LoadShortcuts());
        }
        /// <summary>
        /// 应用更改
        /// </summary>
		private void ArmCommands()
		{
			ShortcutsHelper.ArmCommands();
		}
        /// <summary>
        /// 获取已经加载的ShortcutItems
        /// </summary>
        /// <returns></returns>
		private Dictionary<string, UIFrameworkServices.ShortcutItem> LoadShortcuts()
		{
			return ShortcutsHelper.LoadShortcuts();
		}
        /// <summary>
        /// 保存ShortcutItems
        /// </summary>
        /// <param name="shortcutList"></param>
		private void SaveShortcuts(ICollection<UIFrameworkServices.ShortcutItem> shortcutList)
		{
			ShortcutsHelper.SaveShortcuts(shortcutList);
		}
        /// <summary>
        /// 所有快捷命令条目字典
        /// </summary>
		private Dictionary<string, UIFrameworkServices.ShortcutItem> Commands
		{
			get
			{
				return ShortcutsHelper.Commands;
			}
		}
        /// <summary>
        /// 获取所有ShortcutItems
        /// </summary>
        /// <returns>ShortcutItems</returns>
		public IEnumerable<UIFrameworkServices.ShortcutItem> GetShortcutItems()
		{
			return from e in this.LoadShortcuts()
				select new UIFrameworkServices.ShortcutItem(e.Value);
		}
	}
}