/*
Copyright (c) 2017, John Lewin
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The views and conclusions contained in the software and documentation are those
of the authors and should not be interpreted as representing official policies,
either expressed or implied, of the FreeBSD Project.
*/

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MatterHackers.Agg.UI;
using MatterHackers.DataConverters3D;
using MatterHackers.Localizations;
using MatterHackers.MatterControl.DataStorage;
using MatterHackers.MatterControl.PrintQueue;
using MatterHackers.PolygonMesh;
using MatterHackers.PolygonMesh.Processors;

namespace MatterHackers.MatterControl.Library
{
	public class SqliteFileItem : FileSystemFileItem
	{
		public PrintItem PrintItem { get; }
		public SqliteFileItem(PrintItem printItem)
			: base(printItem.FileLocation)
		{
			this.PrintItem = printItem;
		}

		public override string Name { get => this.PrintItem.Name; set => this.PrintItem.Name = value; }
	}

	public class SqliteLibraryContainer : WritableContainer
	{
		protected List<PrintItemCollection> childCollections = new List<PrintItemCollection>();

		public SqliteLibraryContainer()
		{
			var rootCollection = Datastore.Instance.dbSQLite.Table<PrintItemCollection>().Where(v => v.Name == "_library").Take(1).FirstOrDefault();

			this.Initialize(rootCollection?.Id ?? 0);
		}

		public SqliteLibraryContainer(int collectionID)
		{
			this.Initialize(collectionID);
		}

		private void Initialize(int collectionID)
		{
			this.ChildContainers = new List<ILibraryContainerLink>();
			this.Items = new List<ILibraryItem>();
			this.Name = "Local Library".Localize();
			this.CollectionID = collectionID;
		}

		public int CollectionID { get; private set; }

		public override string KeywordFilter
		{
			get
			{
				return base.KeywordFilter;
			}
			set
			{
				if (base.KeywordFilter != value)
				{
					base.KeywordFilter = value;
					this.OnContentChanged();
				}
			}
		}

		public override void Load()
		{
			childCollections = GetChildCollections();

			this.ChildContainers = childCollections.Select(c => new SqliteLibraryContainerLink()
			{
				ContainerID = c.Id, Name = c.Name }).ToList<ILibraryContainerLink>(); //

			// PrintItems projected onto FileSystemFileItem
			Items = GetLibraryItems(KeywordFilter).Select<PrintItem, ILibraryItem>(printItem =>
			{
				if (File.Exists(printItem.FileLocation))
				{
					return new SqliteFileItem(printItem);
				}
				else
				{
					return new MessageItem($"{printItem.Name} (Missing)");
					//return new MissingFileItem() // Needs to return a content specific icon with a missing overlay - needs to lack all print operations
				}
			}).ToList();
		}

		public override async void Add(IEnumerable<ILibraryItem> items)
		{
			await Task.Run(async () =>
			{
				foreach (var item in items)
				{
					switch (item)
					{
						case CreateFolderItem newFolder:
							var newFolderCollection = new PrintItemCollection(newFolder.Name, "");
							newFolderCollection.ParentCollectionID = this.CollectionID;
							newFolderCollection.Commit();

							break;

						case ILibraryContainerLink containerInfo:
							var newCollection = new PrintItemCollection(containerInfo.Name, "");
							newCollection.ParentCollectionID = this.CollectionID;
							newCollection.Commit();

							break;

						case ILibraryContentStream streamItem:

							string filePath;

							if (streamItem is FileSystemFileItem)
							{
								// Get existing file path
								var fileItem = streamItem as FileSystemFileItem;
								filePath = fileItem.Path;
							}
							else
							{
								// Copy stream to library path
								filePath = ApplicationDataStorage.Instance.GetNewLibraryFilePath("." + streamItem.ContentType);

								using (var outputStream = File.OpenWrite(filePath))
								using (var streamInteface = await streamItem.GetContentStream(null))
								{
									streamInteface.Stream.CopyTo(outputStream);
								}
							}

							if (!string.IsNullOrEmpty(filePath) && File.Exists(filePath))
							{
								if (Path.GetExtension(filePath).ToUpper() == ".ZIP")
								{
									List<PrintItem> partFiles = ProjectFileHandler.ImportFromProjectArchive(filePath);
									if (partFiles != null)
									{
										foreach (PrintItem part in partFiles)
										{
											string childFilePath = part.FileLocation;
											using (var fileStream = File.OpenRead(part.FileLocation))
											{
												AddItem(fileStream, Path.GetExtension(childFilePath), PrintItemWrapperExtensionMethods.GetFriendlyName(Path.GetFileNameWithoutExtension(childFilePath)));
											}
										}
									}
								}
								else
								{
									using (var stream = File.OpenRead(filePath))
									{
										// If the passed in item name equals the fileName, perform friendly name conversion, otherwise use supplied value
										string itemName = streamItem.Name;
										if (itemName == Path.GetFileName(filePath))
										{
											itemName = PrintItemWrapperExtensionMethods.GetFriendlyName(Path.GetFileNameWithoutExtension(filePath));
										}

										AddItem(stream, Path.GetExtension(filePath), itemName);
									}
								}
							}
							break;
					}
				}

				this.OnContentChanged();
			});
		}

		public List<PrintItem> GetLibraryItems(string keyphrase = null)
		{
			// TODO: String concatenation to build sql statements is the root of all sql injection attacts. This needs to be changed to use parameter objects as would be expected
			string query;
			if (string.IsNullOrEmpty(keyphrase))
			{
				query = $"SELECT * FROM PrintItem WHERE PrintItemCollectionID = {CollectionID} ORDER BY Name ASC;";
			}
			else
			{
				query = $"SELECT * FROM PrintItem WHERE PrintItemCollectionID = {CollectionID} AND Name LIKE '%{keyphrase}%' ORDER BY Name ASC;";
			}

			return Datastore.Instance.dbSQLite.Query<PrintItem>(query).ToList();
		}

		public override void Remove(IEnumerable<ILibraryItem> items)
		{
			// TODO: Handle Containers
			foreach(var item in items)
			{
				if (item is SqliteFileItem sqlItem)
				{
					sqlItem.PrintItem.Delete();
				}

				this.Items.Remove(item);
			}

			this.OnContentChanged();
		}

		public override void Rename(ILibraryItem selectedItem, string revisedName)
		{
			if (selectedItem is SqliteFileItem sqliteItem)
			{
				sqliteItem.PrintItem.Name = revisedName;
				sqliteItem.PrintItem.Commit();
			}
			else if (selectedItem is SqliteLibraryContainerLink containerLink)
			{
				string sql = $"SELECT * FROM PrintItemCollection WHERE ID = {containerLink.ContainerID}";

				var container = Datastore.Instance.dbSQLite.Query<PrintItemCollection>(sql).FirstOrDefault();
				if (container != null)
				{
					container.Name = revisedName;
					container.Commit();
				}
			}

			this.OnContentChanged();
		}

		/// <summary>
		/// Creates a database PrintItem entity, if forceAMF is set, converts to AMF otherwise just copies 
		/// the source file to a new library path and updates the PrintItem to point at the new target
		/// </summary>
		private void AddItem(Stream stream, string extension, string displayName, bool forceAMF = true)
		{
			// Create a new entity for the database
			var printItem = new PrintItem()
			{
				Name = displayName,
				PrintItemCollectionID = this.CollectionID
			};

			// Special load processing for mesh data, simple copy below for non-mesh
			if (forceAMF
				&& (extension != "" && MeshFileIo.ValidFileExtensions().Contains(extension.ToUpper())))
			{
				try
				{
					// Load mesh
					IObject3D loadedItem = MeshFileIo.Load(stream, extension, CancellationToken.None);

					// Create a new PrintItemWrapper
					if (!printItem.FileLocation.Contains(ApplicationDataStorage.Instance.ApplicationLibraryDataPath))
					{
						string[] metaData = { "Created By", "MatterControl" };
						if (false) //AbsolutePositioned
						{
							metaData = new string[] { "Created By", "MatterControl", "BedPosition", "Absolute" };
						}

						// save a copy to the library and update this to point at it
						printItem.FileLocation = ApplicationDataStorage.Instance.GetNewLibraryFilePath(".amf");

						MeshFileIo.Save(
							new List<MeshGroup> { loadedItem.Flatten() }, 
							printItem.FileLocation,
							new MeshOutputSettings(MeshOutputSettings.OutputType.Binary, metaData));

						printItem.Commit();
					}
				}
				catch (UnauthorizedAccessException)
				{
					UiThread.RunOnIdle(() =>
					{
						//Do something special when unauthorized?
						StyledMessageBox.ShowMessageBox("Oops! Unable to save changes, unauthorized access", "Unable to save");
					});
				}
				catch
				{
					UiThread.RunOnIdle(() =>
					{
						StyledMessageBox.ShowMessageBox("Oops! Unable to save changes.", "Unable to save");
					});
				}
			}
			else // it is not a mesh so just add it
			{
				// Non-mesh content - copy stream to new Library path
				printItem.FileLocation = ApplicationDataStorage.Instance.GetNewLibraryFilePath(extension);
				using (var outStream = File.Create(printItem.FileLocation))
				{
					stream.CopyTo(outStream);
				}
			}

			printItem.Commit();
		}

		protected List<PrintItemCollection> GetChildCollections()
		{
			return Datastore.Instance.dbSQLite.Query<PrintItemCollection>(
				$"SELECT * FROM PrintItemCollection WHERE ParentCollectionID = {CollectionID} ORDER BY Name ASC;").ToList();
		}

		public override void Dispose()
		{
		}

		public class SqliteLibraryContainerLink : ILibraryContainerLink
		{
			public string ID { get; } = Guid.NewGuid().ToString();

			public int ContainerID { get; set; }

			public string Name { get; set; }

			public bool IsProtected { get; set; } = false;

			public bool IsReadOnly { get; set; } = false;

			public bool IsVisible { get; set; } = true;

			public Task<ILibraryContainer> GetContainer(Action<double, string> reportProgress)
			{
				return Task.FromResult<ILibraryContainer>(
					new SqliteLibraryContainer(this.ContainerID)
					{
						Name = this.Name,
					});
			}
		}
	}
}