/*
	SimpleNotes, A server backed note taking app
    Copyright (C) 2023 Mike Nolan

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
using Eto.Forms;
using Eto.Drawing;
using System.Net.Http;
using Newtonsoft.Json;
using System;
using System.Threading.Tasks;
using System.Collections.Generic;
using System.Net;
using System.Text;
namespace SimpleNotes
{
			public class _NotesResponse
{
    [JsonProperty("success")]
    public bool Success {get;set;}
    [JsonProperty("notes")]
    public List<Note> Notes {get;set;}=new List<Note>();
}
public class _NoteResponse
{
    [JsonProperty("success")]
    public bool Success {get;set;}

    [JsonProperty("note")]
    public Note Note {get;set;}=new Note();
}
public class Note
{    
    [JsonProperty("id")]
    public long Id {get;set;}

    [JsonProperty("title")]
    public string Title {get;set;}="";

    [JsonProperty("body")]
    public string Body {get;set;}="";
}
	public partial class MainForm : Form
	{

		public static HttpClient Client = new HttpClient();
		public MainForm()
		{
			Icon = Icon.FromResource("SimpleNotes.icon.ico",this.GetType().Assembly);
			Title = "SimpleNotes";
			MinimumSize = new Size(320,240);
			Size=new Size(640,480);
			StackLayout layout=new StackLayout();
			layout.Orientation = Orientation.Vertical;
			
			this.Content = layout;
			async Task UpdateAsync()
			{
				
				await Application.Instance.InvokeAsync(()=>{layout.Items.Clear();});
				var pref=PreferenceFile.GetPreferences();
				if(!pref.HasValue)	return;
				 var request = new HttpRequestMessage(HttpMethod.Get,$"{pref.ServerUrl.TrimEnd('/')}/api/note");
                request.Headers.Add("Authorization",$"Basic {Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes($"{pref.Username}:{pref.Password}"))}");
                var response=await Client.SendAsync(request);
				if(response.IsSuccessStatusCode)
                {
					var notes = JsonConvert.DeserializeObject<_NotesResponse>(await response.Content.ReadAsStringAsync());
					if(notes != null && notes.Success)
					{
						await Application.Instance.InvokeAsync(()=>{
							foreach(var note in notes.Notes)
							{
								DynamicLayout layout1=new DynamicLayout();
								layout1.BeginVertical();
								layout1.BeginHorizontal();
								LinkButton item = new LinkButton();
								bool down=false;
								
								item.MouseDown += (sender,e)=>{
									down=true;	
								};
								item.MouseUp += (sender,e)=>{
									down = false;
								};
								item.MouseMove += (sender,e)=>{
									if(down)
									{
										down=false;
									DataObject o=new DataObject();
									if(string.IsNullOrWhiteSpace(note.Body)) return;
									o.SetData(Encoding.UTF8.GetBytes(note.Body),"text/plain");
									DoDragDrop(o,DragEffects.Copy);
									}
								};

								item.Click += (sender,e)=>{
									
									using(var noteEditor=new NoteEditor(note.Title,note.Id))
										noteEditor.ShowModal(this);
										Task.Run(UpdateAsync).ConfigureAwait(false);
								};
								item.Text = note.Title;
								layout1.Add(item,true);
								layout1.Add(new Button((sender,e)=>{
									if(MessageBox.Show($"Delete Note {note.Title}?", MessageBoxButtons.YesNo,MessageBoxType.Question,MessageBoxDefaultButton.No) == DialogResult.Yes)
									{
										Task.Run(async()=>{
											var request2 = new HttpRequestMessage(HttpMethod.Delete,$"{pref.ServerUrl.TrimEnd('/')}/api/note?id={note.Id}");
                							request2.Headers.Add("Authorization",$"Basic {Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes($"{pref.Username}:{pref.Password}"))}");
                							var response2=await Client.SendAsync(request2);
											response2.Dispose();

				
											await UpdateAsync();
										}).ConfigureAwait(false);
									}
								}){Text="Delete"});
								layout1.EndHorizontal();
								layout1.EndVertical();
								var s=new StackLayoutItem();
								s.HorizontalAlignment = HorizontalAlignment.Stretch;
								s.Control = layout1;
								layout.Items.Add(s);
							}
						});
					}
				}
			}

			// create a few commands that can be used for the menu and toolbar
			var createNote = new Command((sender,e)=>{
				using(var noteDlg = new NoteEditor())
					noteDlg.ShowModal(this);
					Task.Run(UpdateAsync).ConfigureAwait(false);
			}) { MenuText = "Create Note", ToolBarText = "Create Note" };
			var refreshNotes = new Command((sender,e)=>{Task.Run(UpdateAsync).ConfigureAwait(false);}) {MenuText="Refresh", ToolBarText="Refresh", Shortcut = Keys.F5};

			var quitCommand = new Command { MenuText = "Quit", Shortcut = Application.Instance.CommonModifier | Keys.Q };
			quitCommand.Executed += (sender, e) => Application.Instance.Quit();

			var aboutCommand = new Command { MenuText = "About..." };
			
			
			aboutCommand.Executed += (sender, e) => new AboutDialog(this.GetType().Assembly){ Logo=Icon, ProgramDescription="A server backed note taking app\nServer Code: https://gitlab.tesses.net/tesses50/simplenotesserver", Website = new Uri("https://simplenotes.tesses.net/")}.ShowDialog(this);

			var preferences= new ButtonMenuItem { Text = "&Preferences..."};
			preferences.Click += (sender,e)=>{
				using(var pref = new PreferenceDialog())
				{
					if(pref.ShowModal(this))
					{
						Task.Run(UpdateAsync).ConfigureAwait(false);
					}
				}
			};
			// create menu
			Menu = new MenuBar
			{
				Items =
				{
					// File submenu
					new SubMenuItem { Text = "&File", Items = { createNote, refreshNotes } },
					// new SubMenuItem { Text = "&Edit", Items = { /* commands/items */ } },
					// new SubMenuItem { Text = "&View", Items = { /* commands/items */ } },
				},
				ApplicationItems =
				{
					// application (OS X) or file menu (others)
					preferences
				},
				QuitItem = quitCommand,
				AboutItem = aboutCommand
			};

			// create toolbar			
			ToolBar = new ToolBar { Items = { createNote, refreshNotes } };
			Task.Run(UpdateAsync).ConfigureAwait(false);
		}
	}
	internal class NoteEditor : Dialog
	{
		public NoteEditor(string noteName="",long id=0)
		{
			
			
			Resizable=true;
			Title = string.IsNullOrWhiteSpace(noteName) ? "Create Note" : noteName;
			Size = new Size(640,480);
			DynamicLayout layout=new DynamicLayout();
			layout.BeginVertical();
			layout.BeginHorizontal();
			TextBox noteTitle = new TextBox(){Text=noteName, PlaceholderText="Note Title"};
			noteTitle.TextChanged += (sender,e)=>{
				Title=string.IsNullOrWhiteSpace(noteTitle.Text) ? "Create Note" : noteTitle.Text;
			};
			TextArea noteBody = new TextArea(){Text=""};

		

			layout.Add(noteTitle,true);
			layout.EndBeginHorizontal();
			layout.Add(noteBody,true,true);
			layout.EndHorizontal();
			layout.EndVertical();
			Content = layout;
			this.Shown += (sender,e)=>{
				Task.Run(async()=>{
					var pref = PreferenceFile.GetPreferences();
					if(!pref.HasValue) return;
					 var request = new HttpRequestMessage(HttpMethod.Get,$"{pref.ServerUrl.TrimEnd('/')}/api/note?id={id}");
                	request.Headers.Add("Authorization",$"Basic {Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes($"{pref.Username}:{pref.Password}"))}");
                	var response=await MainForm.Client.SendAsync(request);
                	var note = response.StatusCode == HttpStatusCode.OK ? JsonConvert.DeserializeObject<_NoteResponse>(await response.Content.ReadAsStringAsync())?.Note : null;
					await Application.Instance.InvokeAsync(()=>{
						noteBody.Text = note.Body;
					});
				}).ConfigureAwait(false);

			};
			 
			ToolBar = new ToolBar(){Items = {
				new Command((sender,e)=>{
					Note note=new Note();
					note.Id = id;
					note.Title = noteTitle.Text;
					note.Body = noteBody.Text;
					var pref = PreferenceFile.GetPreferences();
					if(pref.HasValue)
					{
						Task.Run(async()=>{
							var request = new HttpRequestMessage(HttpMethod.Post,$"{pref.ServerUrl}/api/note");
            				request.Headers.Add("Authorization",$"Basic {Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes($"{pref.Username}:{pref.Password}"))}");
            				request.Content =new System.Net.Http.StringContent(JsonConvert.SerializeObject(note),Encoding.UTF8,"application/json");

            				var result=await MainForm.Client.SendAsync(request);
							if(result.StatusCode == HttpStatusCode.OK)
            				{
                				var res2=JsonConvert.DeserializeObject<_NoteResponse>(await result.Content.ReadAsStringAsync());
                				id=res2?.Note?.Id ?? 0;
								await Application.Instance.InvokeAsync(()=>{MessageBox.Show("Saved note");});
            				}
							
						}).ConfigureAwait(false);
					}	
				}){ToolBarText="Save"}
			}};
		}
	}
    internal class PreferenceDialog : Dialog<bool>
    {
		public PreferenceDialog()
		{
			this.Shown += (sender, e) =>
			{
				this.Size = new Size(320, Size.Height);
			};
			Title="Preferences";
			this.Result=false;
			var pref=PreferenceFile.GetPreferences();
			DynamicLayout layout=new DynamicLayout();
			TextBox url = new TextBox(){PlaceholderText = "Server Url", Text=pref.ServerUrl};
			TextBox username = new TextBox(){PlaceholderText = "Username", Text=pref.Username};
			PasswordBox password = new PasswordBox(){Text=pref.Password};
			Button save=new Button((sender,e)=>{
				pref.ServerUrl = url.Text;
				pref.Username = username.Text;
				pref.Password = password.Text;
				pref.Save();
				Close(true);
			}){Text = "Save"};
			layout.BeginVertical();
			layout.BeginHorizontal();
			layout.Add(new Label(){Text = "Server Url: "});
			layout.Add(url,true);
			layout.EndBeginHorizontal();
			layout.Add(new Label(){Text="Username: "});
			layout.Add(username,true);
			layout.EndBeginHorizontal();
			layout.Add(new Label(){Text="Password: "});
			layout.Add(password,true);
			layout.EndHorizontal();
			layout.EndBeginVertical();
			layout.BeginHorizontal();
			layout.Add(save);
			layout.EndBeginHorizontal();
			layout.EndHorizontal();
			layout.EndVertical();
			Content = layout;
		}
    }
}