// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Xml;
using Tools.DotNETCommon;
using UnrealBuildTool;

namespace AutomationTool
{
    /// <summary>
    /// Parameters for a task that uploads symbols to a symbol server
    /// </summary>
    public class SymStoreTaskParameters
    {
        /// <summary>
        /// The platform toolchain required to handle symbol files.
        /// </summary>
        [TaskParameter]
        public UnrealTargetPlatform Platform;

        /// <summary>
        /// List of output files. PDBs will be extracted from this list.
        /// </summary>
        [TaskParameter]
        public string Files;

        /// <summary>
        /// Output directory for the compressed symbols.
        /// </summary>
        [TaskParameter]
        public string StoreDir;

        /// <summary>
        /// Name of the product for the symbol store records.
        /// </summary>
        [TaskParameter]
        public string Product;

		/// <summary>
		/// BuildVersion associated with these symbols. Used for cleanup in AgeStore by matching this version against a directory name in a build share
		/// </summary>
		[TaskParameter(Optional = true)]
		public string BuildVersion;
	}

    /// <summary>
    /// Task which strips symbols from a set of files
    /// </summary>
    [TaskElement("SymStore", typeof(SymStoreTaskParameters))]
    public class SymStoreTask : CustomTask
    {
        /// <summary>
        /// Parameters for this task
        /// </summary>
        SymStoreTaskParameters Parameters;

        /// <summary>
        /// Construct a spawn task
        /// </summary>
        /// <param name="InParameters">Parameters for the task</param>
        public SymStoreTask(SymStoreTaskParameters InParameters)
        {
            Parameters = InParameters;
        }

        /// <summary>
        /// Execute the task.
        /// </summary>
        /// <param name="Job">Information about the current job</param>
        /// <param name="BuildProducts">Set of build products produced by this node.</param>
        /// <param name="TagNameToFileSet">Mapping from tag names to the set of files they include</param>
        public override void Execute(JobContext Job, HashSet<FileReference> BuildProducts, Dictionary<string, HashSet<FileReference>> TagNameToFileSet)
        {
			// Find the matching files
			List<FileReference> Files = ResolveFilespec(CommandUtils.RootDirectory, Parameters.Files, TagNameToFileSet).ToList();
            
            // Get the symbol store directory
            DirectoryReference StoreDir = ResolveDirectory(Parameters.StoreDir);

			// Take the lock before accessing the symbol server, if required by the platform
			Platform TargetPlatform = Platform.GetPlatform(Parameters.Platform);
			CommandUtils.OptionallyTakeLock(TargetPlatform.SymbolServerRequiresLock, StoreDir, TimeSpan.FromMinutes(60), () =>
			{
				if (!TargetPlatform.PublishSymbols(StoreDir, Files, Parameters.Product, Parameters.BuildVersion))
				{
					throw new AutomationException("Failure publishing symbol files.");
				}
			});
        }

        /// <summary>
        /// Output this task out to an XML writer.
        /// </summary>
        public override void Write(XmlWriter Writer)
        {
            Write(Writer, Parameters);
        }

        /// <summary>
        /// Find all the tags which are used as inputs to this task
        /// </summary>
        /// <returns>The tag names which are read by this task</returns>
        public override IEnumerable<string> FindConsumedTagNames()
        {
            return FindTagNamesFromFilespec(Parameters.Files);
        }

        /// <summary>
        /// Find all the tags which are modified by this task
        /// </summary>
        /// <returns>The tag names which are modified by this task</returns>
        public override IEnumerable<string> FindProducedTagNames()
        {
            yield break;
        }
    }
}