using UnityEditor;
using UnityEngine;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Perforce.P4;

namespace P4Connect
{
	public partial class Engine
	{
		/// <summary>
		/// This class is private because you shouldn't use it directly, talk to the Engine instead!
		/// </summary>
		class Operations
		{
			public static IList<FileSpec> RevertAndDelete(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
				var allFiles = NonNullFilesAndMeta(list);
				con.P4Client.RevertFiles(allFiles, null);
				var result = con.P4Client.DeleteFiles(allFiles, null);
				Utils.LogFiles(result, "Deleting {0}");
				return result;
			}

			public static IList<FileSpec> Delete(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
				var allFiles = NonNullFilesAndMeta(list);
				var result = con.P4Client.DeleteFiles(allFiles, null);
				Utils.LogFiles(result, "Deleting {0}");
				return result;
			}

			public static IList<FileSpec> Revert(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
#if DEBUG
                log.Debug("Revert:");
                log.Debug("    file: "); log.Debug(list);
                log.Debug("  ignore: "); log.Debug(ignoreList);
#endif
				AssetDatabase.StartAssetEditing();
				var allFiles = NonNullFilesAndMeta(list);

				var allFilesMetaRaw = GetFileMetaData(con, allFiles, null);
				List<FileMetaData> allFilesMeta = new List<FileMetaData>();
				Utils.GetMatchingMetaData(allFiles, allFilesMetaRaw, allFilesMeta);

				// Fix reverting a move/delete file, and while we're at it
				for (int i = 0; i < allFiles.Count; ++i)
				{
					if (allFilesMeta[i] != null && allFilesMeta[i].Action == FileAction.MoveDelete)
					{
						// See if the matching Move/Add is in the list
						var moveAddMetaList = GetFileMetaData(con, null, FileSpec.DepotSpec(allFilesMeta[i].MovedFile.Path));
						if (moveAddMetaList != null && moveAddMetaList.Count > 0)
						{
							if (!allFiles.Any(f => f.LocalPath == moveAddMetaList[0].LocalPath))
							{
								allFiles[i] = FileSpec.LocalSpec(moveAddMetaList[0].LocalPath.Path);
							}
						}
					}
				}

				// get directories from the list that need to be deleted
				List<string> dirsToDelete = new List<string>();
				foreach (var fileAndMeta in list)
				{
					if (fileAndMeta.Meta != null)
					{
						string assetMetaPath = Utils.LocalPathToAssetPath(fileAndMeta.Meta.LocalPath.Path);
						string assetPath = Utils.AssetFromMeta(assetMetaPath);
						if (Utils.IsDirectory(assetPath))
						{
							FileState metaState = GetFileState(fileAndMeta.Meta, con);
							if (metaState == FileState.MarkedForAdd || metaState == FileState.MarkedForAddMove)
							{
								// We should delete the folder once done
								dirsToDelete.Add(Utils.AssetPathToFullPath(assetPath));
							}
						}
					}
				}

				var result = con.P4Client.RevertFiles(allFiles, new RevertCmdOptions(RevertFilesCmdFlags.None, -1));
				Utils.LogFiles(result, "Reverting {0}");

				// Delete folders
				foreach (string folder in dirsToDelete)
				{
					try
					{
						System.IO.Directory.Delete(folder, true);
					}
					catch (System.IO.DirectoryNotFoundException)
					{
						// Ignore missing folders, they may have already been deleted
					}
				}

				AssetDatabase.StopAssetEditing();
				//AssetDatabase.Refresh();
#if DEBUG
                log.Debug("...Revert results: "); log.Debug(result);
#endif
				return result;
			}

			public static List<FileSpec> RevertIfUnchanged(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
				List<FileSpec> assetsToRevert = new List<FileSpec>();
				List<FileSpec> metasToRevertIfUnchanged = new List<FileSpec>();
				foreach (var fileAndMeta in list)
				{
					if (fileAndMeta.File != null)
						assetsToRevert.Add(fileAndMeta.File);
					else
						metasToRevertIfUnchanged.Add(fileAndMeta.Meta);
				}

				// Revert orphan metas first
				List<FileSpec> revertedFiles = new List<FileSpec>();
				if (metasToRevertIfUnchanged.Count > 0)
				{
					var res = con.P4Client.RevertFiles(metasToRevertIfUnchanged, new Options(RevertFilesCmdFlags.UnchangedOnly, -1));
					if (res != null)
						revertedFiles.AddRange(res);
				}

				// Then assets
				if (assetsToRevert.Count > 0)
				{
					var res = con.P4Client.RevertFiles(assetsToRevert, new Options(RevertFilesCmdFlags.UnchangedOnly, -1));
					if (res != null)
						revertedFiles.AddRange(res);
				}

				// Now revert metas associated with assets
				if (revertedFiles != null && revertedFiles.Count > 0)
				{
					List<FileSpec> metasToRevert = new List<FileSpec>();
					for (int i = 0; i < revertedFiles.Count; ++i)
					{
						string metaPath = Utils.MetaFromAsset(revertedFiles[i].LocalPath.Path);
                        var llist = list.ToList();
						int metaIndex = llist.FindIndex(fm =>
						{
							bool metaMatches = false;
							if (fm.Meta != null)
							{
								metaMatches = String.Compare(metaPath, fm.Meta.LocalPath.Path, StringComparison.InvariantCultureIgnoreCase) == 0;
							}
							return metaMatches;
						});
						if (metaIndex != -1)
						{
							metasToRevert.Add(list[metaIndex].Meta);
						}
					}

					// Revert metas associated with assets
					if (metasToRevert.Count > 0)
					{
						var revertMetaResult = con.P4Client.RevertFiles(metasToRevert, new RevertCmdOptions(RevertFilesCmdFlags.None, -1));
						if (revertMetaResult != null)
							revertedFiles.AddRange(revertMetaResult);
					}
				}

				if (revertedFiles.Count > 0)
				{
					Utils.LogFiles(revertedFiles, "Reverting (unchanged) {0}");
				}
				return revertedFiles;
			}

			public static IList<FileSpec> RevertAndCheckout(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
				var allFiles = NonNullFilesAndMeta(list);
				con.P4Client.RevertFiles(allFiles, null);
				var result = con.P4Client.EditFiles(allFiles, null);
				Utils.LogFiles(result, "Restoring {0}");
				Utils.CheckForMissingFilesAndWarn(allFiles, result, "The following files could not be checked out:");
				return result;
			}

			public static IList<FileSpec> RevertAndCheckoutNoOverwrite(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
				var allFiles = NonNullFilesAndMeta(list);
				con.P4Client.RevertFiles(allFiles, new Options(RevertFilesCmdFlags.ServerOnly, -1));
				var result = con.P4Client.EditFiles(allFiles, null);
				Utils.LogFiles(result, "Checking out {0} and keeping current modifications");
				Utils.CheckForMissingFilesAndWarn(allFiles, result, "The following files could not be checked out:");
				return result;
			}

			public static IList<FileSpec> Add(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
				var allFiles = NonNullFilesAndMeta(list);

				// Check for wildcards
				var wild = VerifyWildcards(list);

				var result = new List<FileSpec>();
				if (wild != WildcardCheck.Cancel)
				{
					// Use text or binary based on the editor settings
					List<FileSpec> textFiles = new List<FileSpec>();
					List<FileSpec> binaryFiles = new List<FileSpec>();
					List<FileSpec> unknownFiles = new List<FileSpec>();
					Utils.FilterTextAndBinary(allFiles, textFiles, binaryFiles, unknownFiles);

					AddFilesCmdFlags flags = AddFilesCmdFlags.None;
					if (wild == WildcardCheck.Force)
					{
						flags = AddFilesCmdFlags.KeepWildcards;
					}

					AddFilesCmdOptions optionsText = new AddFilesCmdOptions(flags, -1, new FileType(BaseFileType.Text, FileTypeModifier.None));
					AddFilesCmdOptions optionsBinary = new AddFilesCmdOptions(flags, -1, new FileType(BaseFileType.Binary, FileTypeModifier.None));
					AddFilesCmdOptions optionsUnknown = new AddFilesCmdOptions(flags, -1, null);
					if (textFiles.Count > 0)
					{
						var added = con.P4Client.AddFiles(textFiles, optionsText);
						if (added != null)
							result.AddRange(added);
					}
					if (binaryFiles.Count > 0)
					{
						var added = con.P4Client.AddFiles(binaryFiles, optionsBinary);
						if (added != null)
							result.AddRange(added);
					}
					if (unknownFiles.Count > 0)
					{
						var added = con.P4Client.AddFiles(unknownFiles, optionsUnknown);
						if (added != null)
							result.AddRange(added);
					}
					Utils.LogFiles(result, "Adding {0}");
				}
				return result;
			}

			public static List<FileSpec> RevertAndAddNoOverwrite(PerforceConnection con, List<FileAndMeta> list, List<FileAndMeta> moveToList)
			{
				var wild = VerifyWildcards(moveToList);

				List<FileSpec> result = new List<FileSpec>();
				if (wild != WildcardCheck.Cancel)
				{
					AddFilesCmdFlags flags = wild == WildcardCheck.Force ? AddFilesCmdFlags.KeepWildcards : AddFilesCmdFlags.None;

					for (int i = 0; i < list.Count; ++i)
					{
						if (list[i].File != null)
						{
							con.P4Client.RevertFiles(new Options(RevertFilesCmdFlags.ServerOnly, -1), list[i].File);
							AddFilesCmdOptions options = null;
							switch (Utils.FilterTextAndBinary(moveToList[i].File))
							{
								case Utils.FilterTextAndBinaryResult.Binary:
									options = new AddFilesCmdOptions(flags, -1, new FileType(BaseFileType.Binary, FileTypeModifier.None));
									break;
								case Utils.FilterTextAndBinaryResult.Text:
									options = new AddFilesCmdOptions(flags, -1, new FileType(BaseFileType.Text, FileTypeModifier.None));
									break;
								case Utils.FilterTextAndBinaryResult.Unknown:
									options = new AddFilesCmdOptions(flags, -1, null);
									break;
							}

							var added = con.P4Client.AddFiles(options, moveToList[i].File);
							if (added != null)
								result.AddRange(added);
						}
						if (list[i].Meta != null)
						{
							con.P4Client.RevertFiles(new Options(RevertFilesCmdFlags.ServerOnly, -1), list[i].Meta);
							AddFilesCmdOptions options = null;
							switch (Utils.FilterTextAndBinary(moveToList[i].Meta))
							{
								case Utils.FilterTextAndBinaryResult.Binary:
									options = new AddFilesCmdOptions(flags, -1, new FileType(BaseFileType.Binary, FileTypeModifier.None));
									break;
								case Utils.FilterTextAndBinaryResult.Text:
									options = new AddFilesCmdOptions(flags, -1, new FileType(BaseFileType.Text, FileTypeModifier.None));
									break;
								case Utils.FilterTextAndBinaryResult.Unknown:
									options = new AddFilesCmdOptions(flags, -1, null);
									break;
							}
							var added = con.P4Client.AddFiles(options, moveToList[i].Meta);
							if (added != null)
								result.AddRange(added);
						}
					}
					Utils.LogFiles(result, moveToList, "Moving new file {0} to {1}");
				}
				return result;
			}

			public static IList<FileSpec> Checkout(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
				var allFiles = NonNullFilesAndMeta(list);
				IList<FileSpec> result = new List<FileSpec>();
				if (allFiles.Count > 0)
				{
					result = con.P4Client.EditFiles(allFiles, null);
					Utils.LogFiles(result, "Checking out {0}");
					Utils.CheckForMissingFilesAndWarn(allFiles, result, "The following files could not be checked out:");
				}
				return result;
			}

			public static List<FileSpec> Move(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> moveToList)
			{
				var wild = VerifyWildcards(moveToList);
				List<FileSpec> result = new List<FileSpec>();
				if (wild != WildcardCheck.Cancel)
				{
					MoveFileCmdFlags flags = wild == WildcardCheck.Force ? MoveFileCmdFlags.ServerOnly | MoveFileCmdFlags.Force : MoveFileCmdFlags.ServerOnly;
					Options options = new Options(flags, -1, null);

					for (int i = 0; i < list.Count; ++i)
					{
						if (list[i].File != null)
						{
							con.P4Client.EditFiles(new Options(EditFilesCmdFlags.ServerOnly, -1, null), list[i].File);
							var moved = con.P4Client.MoveFiles(list[i].File, moveToList[i].File, options);
							if (moved != null)
								result.AddRange(moved);
						}
						if (list[i].Meta != null)
						{
							con.P4Client.EditFiles(new Options(EditFilesCmdFlags.ServerOnly, -1, null), list[i].Meta);
							var moved = con.P4Client.MoveFiles(list[i].Meta, moveToList[i].Meta, options);
							if (moved != null)
								result.AddRange(moved);
						}
					}
					Utils.LogFiles(result, moveToList, "Moving/Renaming {0} to {1}");
				}
				return result;
			}

			public static List<FileSpec> RevertAndMove(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> moveToList)
			{
				var wild = VerifyWildcards(moveToList);
				List<FileSpec> result = new List<FileSpec>();
				if (wild != WildcardCheck.Cancel)
				{
					MoveFileCmdFlags flags = wild == WildcardCheck.Force ? MoveFileCmdFlags.ServerOnly | MoveFileCmdFlags.Force : MoveFileCmdFlags.ServerOnly;
					Options options = new Options(flags, -1, null);

					var allFiles = NonNullFilesAndMeta(list);
					con.P4Client.RevertFiles(allFiles, null);

					for (int i = 0; i < list.Count; ++i)
					{
						if (list[i].File != null)
						{
							con.P4Client.EditFiles(new Options(EditFilesCmdFlags.ServerOnly, -1, null), list[i].File);
							var moved = con.P4Client.MoveFiles(list[i].File, moveToList[i].File, options);
							if (moved != null)
								result.AddRange(moved);
						}
						if (list[i].Meta != null)
						{
							con.P4Client.EditFiles(new Options(EditFilesCmdFlags.ServerOnly, -1, null), list[i].Meta);
							var moved = con.P4Client.MoveFiles(list[i].Meta, moveToList[i].Meta, options);
							if (moved != null)
								result.AddRange(moved);
						}
					}
					Utils.LogFiles(result, moveToList, "Moving/Renaming {0} to {1}");
				}
				return result;
			}

			public static List<FileSpec> RevertAndMoveNoOverwrite(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> moveToList)
			{
				var wild = VerifyWildcards(moveToList);
				List<FileSpec> result = new List<FileSpec>();
				if (wild != WildcardCheck.Cancel)
				{
					MoveFileCmdFlags flags = wild == WildcardCheck.Force ? MoveFileCmdFlags.ServerOnly | MoveFileCmdFlags.Force : MoveFileCmdFlags.ServerOnly;
					Options options = new Options(flags, -1, null);

					var allFiles = NonNullFilesAndMeta(list);
					con.P4Client.RevertFiles(allFiles, new Options(RevertFilesCmdFlags.ServerOnly, -1));
					for (int i = 0; i < list.Count; ++i)
					{
						if (list[i].File != null)
						{
							con.P4Client.EditFiles(new Options(EditFilesCmdFlags.ServerOnly, -1, null), list[i].File);
							var moved = con.P4Client.MoveFiles(list[i].File, moveToList[i].File, options);
							if (moved != null)
								result.AddRange(moved);
						}
						if (list[i].Meta != null)
						{
							con.P4Client.EditFiles(new Options(EditFilesCmdFlags.ServerOnly, -1, null), list[i].Meta);
							var moved = con.P4Client.MoveFiles(list[i].Meta, moveToList[i].Meta, options);
							if (moved != null)
								result.AddRange(moved);
						}
					}
					Utils.LogFiles(result, moveToList, "Moving/Renaming {0} to {1}");
				}
				return result;
			}

			public static List<FileSpec> MoveToNewLocation(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> moveToList)
			{
				var wild = VerifyWildcards(moveToList);
				List<FileSpec> result = new List<FileSpec>();
				if (wild != WildcardCheck.Cancel)
				{
					MoveFileCmdFlags flags = wild == WildcardCheck.Force ? MoveFileCmdFlags.ServerOnly | MoveFileCmdFlags.Force : MoveFileCmdFlags.ServerOnly;
					Options options = new Options(flags, -1, null);

					for (int i = 0; i < list.Count; ++i)
					{
						if (list[i].File != null)
						{
							var moved = con.P4Client.MoveFiles(list[i].File, moveToList[i].File, options);
							if (moved != null)
								result.AddRange(moved);
						}
						if (list[i].Meta != null)
						{
							var moved = con.P4Client.MoveFiles(list[i].Meta, moveToList[i].Meta, options);
							if (moved != null)
								result.AddRange(moved);
						}
					}
					Utils.LogFiles(result, moveToList, "Moving/Renaming {0} to {1}");
				}
				return result;
			}

			public static IList<FileSpec> GetLatest(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
				var allFiles = NonNullFilesAndMeta(list);
				var result = PerformGetLastestAndPostChecks(con, allFiles, null);
				return result;
			}

			public static IList<FileSpec> ForceGetLatest(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
				var allFiles = NonNullFilesAndMeta(list);
				var result = PerformGetLastestAndPostChecks(con, allFiles, new Options(SyncFilesCmdFlags.Force, -1));
				return result;
			}

			public static IList<FileSpec> RevertAndGetLatest(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
				var allFiles = NonNullFilesAndMeta(list);
				con.P4Client.RevertFiles(allFiles, null);
				var result = PerformGetLastestAndPostChecks(con, allFiles, new Options(SyncFilesCmdFlags.Force, -1));
				return result;
			}

			public static IList<FileSpec> Lock(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
				var allFiles = NonNullFilesAndMeta(list);
				var result = con.P4Client.LockFiles(allFiles, null);
				Utils.LogFiles(result, "Locking {0}");
				return result;
			}

			public static IList<FileSpec> Unlock(PerforceConnection con, IList<FileAndMeta> list, IList<FileAndMeta> ignoreList)
			{
				var allFiles = NonNullFilesAndMeta(list);
				var result = con.P4Client.UnlockFiles(allFiles, null);
				Utils.LogFiles(result, "Unlocking {0}");
				return result;
			}
		}
	}
}