using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Build.Utilities;
using System.Diagnostics;
using MessageImportance = Microsoft.Build.Framework.MessageImportance;
using Microsoft.Build.Framework;

namespace Cosmos.Build.MSBuild
{
	public enum WriteType
	{
		Warning,
		Error,
		Message, // only issued on console
		Info
	}

    public class LogInfo
    {
        /// <summary>
        /// Specifies if warning, error, info or message.
        /// </summary>
        public WriteType logType;

        /// <summary>
        /// Description of the type (can be null).
        /// </summary>
        public string subcategory;
        
        /// <summary>
        /// Message, Warning or Error code (can be null)
        /// </summary>
        public string code;

        /// <summary>
        /// The help keyword for the host IDE (can be null).
        /// </summary>
        public string helpKeyword;

        /// <summary>
        /// The path to the file causing the message (can be null).
        /// </summary>
        public string file;

        /// <summary>
        /// The line in the file causing the message (set to zero if not available).
        /// </summary>
        public int lineNumber;

        /// <summary>
        /// The column in the file causing the message (set to zero if not available).
        /// </summary>
        public int columnNumber;

        /// <summary>
        /// The last line of a range of lines in the file causing the message (set to zero if not available).
        /// </summary>
        public int endLineNumber;

        /// <summary>
        /// The last column of a range of columns in the file causing the message (set to zero if not available).
        /// </summary>
        public int endColumnNumber;

        /// <summary>
        /// Importance of the message. (default is High)
        /// </summary>
        public MessageImportance importance;

        /// <summary>
        /// The message string.
        /// </summary>
        public string message;

        /// <summary>
        /// Optional arguments for formatting the message string.
        /// </summary>
        public object[] messageArgs;//TODO check if null is allowed, if yes document it here
    }


	public abstract class BaseToolTask : AppDomainIsolatedTask
	{
		protected bool ExecuteTool(string workingDir, string filename, string arguments, string name)
		{
			var xProcessStartInfo = new ProcessStartInfo();
			xProcessStartInfo.WorkingDirectory = workingDir;
			xProcessStartInfo.FileName = filename;
			xProcessStartInfo.Arguments = arguments;
			xProcessStartInfo.UseShellExecute = false;
			xProcessStartInfo.RedirectStandardOutput = true;
			xProcessStartInfo.RedirectStandardError = true;
			xProcessStartInfo.CreateNoWindow = true;
			using (var xProcess = new Process())
			{
				xProcess.ErrorDataReceived += delegate(object sender, DataReceivedEventArgs e)
				{
					if (e.Data != null)
						mErrors.Add(e.Data);
				};
				xProcess.OutputDataReceived += delegate(object sender, DataReceivedEventArgs e)
				{
					if (e.Data != null)
						mOutput.Add(e.Data);
				};
				xProcess.StartInfo = xProcessStartInfo;
				mErrors = new List<string>();
				mOutput = new List<string>();
				xProcess.Start();
				xProcess.BeginErrorReadLine();
				xProcess.BeginOutputReadLine();
				xProcess.WaitForExit(15 * 60 * 1000); // wait 15 minutes
				if (xProcess.ExitCode != 0) {
					if (!xProcess.HasExited) {
						xProcess.Kill();
						Log.LogError("{0} timed out.", name);
					}
					else {
						Log.LogError("Error occurred while invoking {0}.", name);
					}
				}
				LogInfo logContent;
				foreach (var xError in mErrors) {
					if(ExtendLineError(xProcess.ExitCode, xError, out logContent)) {
                        Logs(logContent);
					}
				}
				foreach (var xOutput in mOutput) {
					if (ExtendLineError(xProcess.ExitCode, xOutput, out logContent)) {
						Logs(logContent);
					}
				}
				return xProcess.ExitCode == 0;
			}
		}

		private List<string> mErrors;
		private List<string> mOutput;

		public virtual bool ExtendLineError(int exitCode, string errorMessage, out LogInfo log)
		{
            log = new LogInfo();
			log.logType = WriteType.Error;
			if (exitCode == 0)
				return false;
			return true;
		}

		public virtual bool ExtendLineOutput(int exitCode, ref string errorMessage, out LogInfo log)
		{
            log = new LogInfo();
            log.logType = WriteType.Info;
			return true;
		}

        public void Logs(LogInfo logInfo)// string message, string category, string filename, string lineNumber = 0, string columnNumber = 0)
		{
            switch (logInfo.logType)
			{
				case WriteType.Warning:
                    //Log.LogWarning(category, string.Empty, string.Empty, filename, lineNumber, columnNumber, lineNumber, columnNumber, message);
                    Log.LogWarning(logInfo.subcategory, logInfo.code, logInfo.helpKeyword, logInfo.file, logInfo.lineNumber, logInfo.columnNumber, logInfo.endLineNumber, logInfo.endColumnNumber, logInfo.message, logInfo.messageArgs);
					break;
				case WriteType.Message:
                    Log.LogMessage(logInfo.subcategory, logInfo.code, logInfo.helpKeyword, logInfo.file, logInfo.lineNumber, logInfo.columnNumber, logInfo.endLineNumber, logInfo.endColumnNumber, logInfo.message, logInfo.messageArgs);
					break;
				case WriteType.Info:
					// changed IDEBuildLogger.cs for this behavior of add to ErrorList Messages
                    Log.LogMessage(logInfo.subcategory, logInfo.code, logInfo.helpKeyword, logInfo.file, logInfo.lineNumber, logInfo.columnNumber, logInfo.endLineNumber, logInfo.endColumnNumber, logInfo.importance, logInfo.message, logInfo.messageArgs);
					break;
                case WriteType.Error:
				default:
					Log.LogError(logInfo.subcategory, logInfo.code, logInfo.helpKeyword, logInfo.file, logInfo.lineNumber, logInfo.columnNumber, logInfo.endLineNumber, logInfo.endColumnNumber, logInfo.message, logInfo.messageArgs);;
					break;
			}
		}
	}
}