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/*******************************************************************************
 * Name		: Repository.Label.cs
 *
 * Author	: wjb
 *
 * Description	: Label operations for the Repository.
 *
 ******************************************************************************/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace Perforce.P4
{
	public partial class Repository
	{
		/// <summary>
		/// Create a new label in the repository.
		/// </summary>
		/// <param name="label">Label specification for the new label</param>
		/// <param name="options">The '-i' flag is required when creating a new label </param>
		/// <returns>The Label object if new label was created, null if creation failed</returns>
		/// <remarks> The '-i' flag is added if not specified by the caller
		/// <br/>
		/// <br/><b>p4 help label</b>
		/// <br/> 
		/// <br/>    label -- Create or edit a label specification
		/// <br/> 
		/// <br/>    p4 label [-f -g -t template] name
		/// <br/>    p4 label -d [-f -g] name
		/// <br/>    p4 label -o [-t template] name
        /// <br/>    p4 label -i [-f -g]   
		/// <br/> 
		/// <br/> 	Create  or edit a label. The name parameter is required. The
		/// <br/> 	specification form is put into a temporary file and the editor
		/// <br/> 	(configured by the environment variable $P4EDITOR) is invoked.
		/// <br/> 
		/// <br/> 	The label specification form contains the following fields:
		/// <br/> 
		/// <br/> 	Label:       The label name (read only.)
		/// <br/> 
		/// <br/> 	Owner:       The user who created this label.  Can be changed.
		/// <br/> 
		/// <br/> 	Update:      The date that this specification was last modified.
		/// <br/> 
		/// <br/> 	Access:      The date of the last 'labelsync' or use of '@label'
		/// <br/> 		     referencing this label.
		/// <br/> 
		/// <br/> 	Description: A short description of the label (optional).
		/// <br/> 
		/// <br/> 	Options:     Flags to change the label behavior.
		/// <br/> 
		/// <br/> 	             locked	    Prevents users other than the label owner
		/// <br/> 				 unlocked   from changing the specification. Prevents
		/// <br/> 				            the label from being deleted. Prohibits
		/// <br/> 				            'p4 labelsync'. For a loaded label, prevents 
        /// <br/>                           'p4 unload'.
        /// <br/> 
        /// <br/>                autoreload   For a static label, indicates where label
        /// <br/>                noautoreload revisions are stored. Specify 'noautoreload'
        /// <br/>                             to indicate that the revisions should be
        /// <br/>                             stored in the db.label table. Specify
        /// <br/>                             'autoreload' to indicate that the revisions
        /// <br/>                             should be stored in the unload depot.
        /// <br/> 	Revision:    An optional revision specification for an automatic
        /// <br/>                label.  Enclose in double quotes if it contains the
        /// <br/>                # (form comment) character.  An automatic label can
        /// <br/>                be treated as a pure alias of a single revision
        /// <br/>                specification (excluding @label) provided that the
        /// <br/>                View mapping is empty.
        /// <br/>
        /// <br/>   View:        A mapping that selects files from the depot. The
        /// <br/>                default view selects all depot files. Only the left
        /// <br/>                side of the mapping is used for labels.  Leave this
        /// <br/>                field blank when creating an automatic label as
        /// <br/>                a pure alias.
        /// <br/>
        /// <br/>  ServerID:    If set, restricts usage to the named server.
        /// <br/>               If unset, usage is allowed on any server.
        /// <br/>  
        /// <br/>  A label is a named collection of revisions.  A label is either
        /// <br/>  automatic or static.  An automatic label refers to the revisions
        /// <br/>  given in the View: and Revision: fields.  A static label refers to
        /// <br/>  the revisions that are associated with the label using the 'p4 tag'
        /// <br/>  or 'p4 labelsync' commands.  A static label cannot have a Revison:
        /// <br/>  field. See 'p4 help revisions' for information on using labels as
        /// <br/>  revision specifiers.
        /// <br/>  
        /// <br/>  Only the label owner can run 'p4 labelsync', and only if the label
        /// <br/>  is unlocked. A label without an owner can be labelsync'd by any user.
        /// <br/>  
        /// <br/>  Flag -d deletes the specified label. You cannot delete a locked label.
        /// <br/>  The -f flag forces the delete.
        /// <br/>  
        /// <br/>  The -o flag writes the label specification to standard output.  The
        /// <br/>  user's editor is not invoked.
        /// <br/>  
        /// <br/>  The -i flag reads a label specification from standard input.  The
        /// <br/>  user's editor is not invoked.
        /// <br/>  
        /// <br/>  The -t flag copies the view and options from the template label to
        /// <br/>  the new label.
        /// <br/>  
        /// <br/>  The -f flag forces the deletion of a label. By default, locked labels
        /// <br/>  can only be deleted by their owner.  The -f flag also permits the
        /// <br/>  Last Modified date to be set.  The -f flag requires 'admin' access,
        /// <br/>  which is granted by 'p4 protect'.
        /// <br/>  
        /// <br/>  The -g flag should be used on an Edge Server to update a global
        /// <br/>  label. Without -g, the label definition is visible only to users
        /// <br/>  of this Edge Server. Configuring rpl.labels.global=1 reverses this
        /// <br/>  default and causes this flag to have the opposite meaning.
        /// <br/>
        /// <br/>
		/// </remarks>
        /// <example>
        ///     To create a new label:
        ///     
        /// <code>
        /// 
        ///         Label l = new Label();
        ///         l.Id = "newLabel";
        ///         l.Owner = "admin";
        ///         l.Description = "created by admin";
        ///         l.Options = "unlocked";
        ///         l.ViewMap = new ViewMap();
        ///         string v0 = "//depot/main/...";
        ///         string v1 = "//depot/rel1/...";
        ///         string v2 = "//depot/rel2/...";
        ///         string v3 = "//depot/dev/...";
        ///         l.ViewMap.Add(v0);
        ///         l.ViewMap.Add(v1);
        ///         l.ViewMap.Add(v2);
        ///         l.ViewMap.Add(v3);
        ///         Label newLabel = rep.CreateLabel(l, null);
        ///         
        /// </code>
        /// 
        ///     To create a label using another label as a template:
        /// <code>
        ///         
        ///         Label newLabel2 = rep.CreateLabel(newLabel, 
        ///             new LabelCmdOptions(LabelCmdFlags.None, newLabel.Id));
        /// </code>     
        /// </example>
		public Label CreateLabel(Label label, Options options)
		{
			if (label == null)
			{
				throw new ArgumentNullException("label");

			}
			P4Command cmd = new P4Command(this, "label", true);

			cmd.DataSet = label.ToString();

			if (options == null)
			{
				options = new Options((LabelCmdFlags.Input), null);
			}
			if (options.ContainsKey("-i") == false)
			{
				options["-i"] = null;
			}

			P4CommandResult results = cmd.Run(options);
			if (results.Success)
			{
				return label;
			}
			else
			{
				P4Exception.Throw(results.ErrorList);
			}
			return null;
		}
		/// <summary>
		/// Create a new label in the repository.
		/// </summary>
		/// <param name="label">Label specification for the new label</param>
		/// <returns>The Label object if new label was created, null if creation failed</returns>
        /// <example>
        ///     To create a new label:
        ///     
        ///     <code>
        /// 
        ///         Label l = new Label();
        ///         l.Id = "newLabel";
        ///         l.Owner = "admin";
        ///         l.Description = "created by admin";
        ///         l.Options = "unlocked";
        ///         l.ViewMap = new ViewMap();
        ///         string v0 = "//depot/main/...";
        ///         string v1 = "//depot/rel1/...";
        ///         string v2 = "//depot/rel2/...";
        ///         string v3 = "//depot/dev/...";
        ///         l.ViewMap.Add(v0);
        ///         l.ViewMap.Add(v1);
        ///         l.ViewMap.Add(v2);
        ///         l.ViewMap.Add(v3);
        ///         Label newLabel = rep.CreateLabel(l, null);
        ///         
        ///     </code>
        ///</example>
		public Label CreateLabel(Label label)
		{
			return CreateLabel(label, null);
		}
		/// <summary>
		/// Update the record for a label in the repository
		/// </summary>
		/// <param name="label">Label specification for the label being updated</param>
		/// <returns>The Label object if new depot was saved, null if creation failed</returns>
        /// <example>
        /// 
        ///     To lock a label:
        ///     
        /// <code>
        ///         Label l = rep.GetLabel("admin_label");
        ///         l.Locked = true;
        ///         rep.UpdateLabel(l);
        ///         
        /// </code>
        /// </example>
		public Label UpdateLabel(Label label)
		{
			return CreateLabel(label, null);
		}
		/// <summary>
		/// Get the record for an existing label from the repository.
		/// </summary>
		/// <param name="label">Label name</param>
        /// <param name="options">Flags used when fetching an existing label</param>
		/// <returns>The Label object if label was found, null if creation failed</returns>
        /// <example>
        /// 
        ///     To get the admin_label with the gobal option:
        /// 
        /// <code>
        /// 
        ///         LabelCmdOptions opts = new LabelCmdOptions(LabelCmdFlags.Global,null);
        ///         Label label = rep.GetLabel("admin_label", null, opts);
        ///         
        /// </code>
        /// </example>
		public Label GetLabel(string label, string template, Options options)
		{
			if (label == null)
			{
				throw new ArgumentNullException("label");

			}
			P4Command cmd = new P4Command(this, "label", true, label);

			if (options == null)
			{
				options = new Options((LabelCmdFlags.Output), template);
			}

			if (options.ContainsKey("-o") == false)
			{
				options["-o"] = null;
			}

			P4CommandResult results = cmd.Run(options);
			if (results.Success)
			{
				if ((results.TaggedOutput == null) || (results.TaggedOutput.Count <= 0))
				{
					return null;
				}
				Label value = new Label();

 				value.FromLabelCmdTaggedOutput(results.TaggedOutput[0]);

				return value;
			}
			else
			{
				P4Exception.Throw(results.ErrorList);
			}
			return null;
		}

        /// <summary>
        /// Get the record for an existing label from the repository.
        /// </summary>
        /// <param name="label">Label name</param>
        /// <returns>The Label object if label was found, null if creation failed</returns>
        /// <example>
        /// 
        ///     To get the admin_label:
        /// 
        /// <code>
        /// 
        ///         string targetLabel = "admin_label";
        ///         Label l = rep.GetLabel(targetLabel);
        ///         
        /// </code>
        /// </example>
		public Label GetLabel(string label)
		{
			return GetLabel(label, null, null);
		}

		/// <summary>
		/// Get a list of labels from the repository
		/// </summary>
		/// <returns>A list containing the matching labels</returns>
	    /// <remarks>
		/// <br/><b>p4 help labels</b>
		/// <br/> 
		/// <br/>     p4 labels [-t] [-u user] [[-e|-E] nameFilter -m max] [file[revrange]]
		/// <br/>     p4 labels [-t] [-u user] [[-e|-E] nameFilter -m max] [-a|-s serverID]
		/// <br/>     p4 labels -U
		/// <br/> 	
		/// <br/> 	Lists labels defined in the server.
		/// <br/> 	
		/// <br/> 	If files are specified, 'p4 labels' lists the labels that contain
		/// <br/> 	those files.  If you include a file specification, automatic labels
		/// <br/> 	and labels with the 'autoreload' option set are omitted from the list.
		/// <br/> 	If the file specification includes a revision range, 'p4 labels'
		/// <br/> 	lists labels that contain the specified revisions.
		/// <br/> 	
		/// <br/> 	See 'p4 help revisions' for details about specifying revisions.
		/// <br/> 	
		/// <br/> 	The -t flag displays the time as well as the date.
		/// <br/> 	
		/// <br/> 	The -u user flag lists labels owned by the specified user.
		/// <br/> 	
		/// <br/> 	The -e nameFilter flag lists labels with names that match the
		/// <br/> 	the nameFilter pattern, for example:  -e 'svr-dev-rel*'. -E makes
		/// <br/> 	the matching case-insensitive.
		/// <br/> 	
		/// <br/> 	The -m max flag limits output to the first 'max' number of labels.
		/// <br/> 	
		/// <br/> 	The -U flag lists unloaded labels (see 'p4 help unload').
		/// <br/> 	
		/// <br/> 	The -a and -s flags are useful in a distributed server installation
		/// <br/> 	(see 'p4 help distributed') in order to see the names of local labels
		/// <br/> 	stored on other Edge Servers. These flags are not allowed if the
		/// <br/> 	command includes a file specification.
		/// <br/> 	
		/// <br/> 	The -a flag specifies that all labels should be displayed, not just
		/// <br/> 	those that are bound to this server.
		/// <br/> 	
		/// <br/> 	The -s serverID flag specifies that only those labels bound to the
		/// <br/> 	specified serverID should be displayed.
		/// <br/> 	
		/// <br/> 	On an Edge Server, if neither -s nor -a is specified, only those
		/// <br/> 	local labels bound to this Edge Server are displayed. Labels created
        /// <br/> 	on the Commit Server are global, and are also included in the output.
		/// <br/> 
		/// </remarks>
        /// <example>
        ///     
        ///     To get 50 labels on a distributed server installation:
        ///     
        ///     <code>
        /// 
        ///         LabelsCmdOptions opts = new LabelsCmdOptions(LabelsCmdFlags.All,
        ///             null, null, 50, null, null);
        ///         IList&#60;Label&#62; labels = rep.GetLabels(opts);
        ///     
        ///     </code>
        /// 
        ///     To get labels which contain files with the path //depot/Modifiers/...:
        ///     
        ///     <code>
        ///         FileSpec path = new FileSpec(new DepotPath("//depot/Modifiers/..."), null);
        ///         Options ops = new Options();
        ///         IList&#60;Label&#62; l = rep.GetLabels(ops, path); 
        ///         
        ///     </code>
        /// </example>
		public IList<Label> GetLabels(Options options, params FileSpec[] files)
		{
			P4Command cmd = null;
			if ((files != null) && (files.Length > 0))
			{
				cmd = new P4Command(this, "labels", true, FileSpec.ToStrings(files));
			}
			else
			{
				cmd = new P4Command(this, "labels", true);
			}

			P4CommandResult results = cmd.Run(options);
			if (results.Success)
			{
				if ((results.TaggedOutput == null) || (results.TaggedOutput.Count <= 0))
				{
					return null;
				}

                bool dst_mismatch = false;
                string offset = string.Empty;

                if (Server != null && Server.Metadata != null)
                {
                    offset = Server.Metadata.DateTimeOffset;
                    dst_mismatch = FormBase.DSTMismatch(Server.Metadata);
                    
                }

				List<Label> value = new List<Label>();
				foreach (TaggedObject obj in results.TaggedOutput)
				{
					Label label = new Label();
					label.FromLabelsCmdTaggedOutput(obj, offset, dst_mismatch);
					value.Add(label);
				}
				return value;
			}
			else
			{
				P4Exception.Throw(results.ErrorList);
			}
			return null;
		}

		/// <summary>
		/// Delete a label from the repository
		/// </summary>
		/// <param name="label">The label to be deleted</param>
		/// <param name="options">The 'f' and '-d' flags are valid when deleting an
		/// existing label</param>
        /// <example>
        /// 
        ///  To delete the label admin_label:   
        /// 
        /// <code>
        ///     
        ///     Label deleteTarget = new Label();
        ///     deleteTarget.Id = "admin_label";
        ///     rep.DeleteLabel(deleteTarget, null);
        ///     
        /// </code>
        /// 
        /// </example>
		public void DeleteLabel(Label label, Options options)
		{
			if (label == null)
			{
				throw new ArgumentNullException("label");

			}
			P4Command cmd = new P4Command(this, "label", true, label.Id);

			if (options == null)
			{
				options = new Options(LabelCmdFlags.Delete, null);
			}

			if (options.ContainsKey("-d") == false)
			{
				options["-d"] = null;
			}

			P4CommandResult results = cmd.Run(options);
			if (results.Success == false)
			{
				P4Exception.Throw(results.ErrorList);
			}
		}
	}
}