using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Build.Evaluation;
using Microsoft.Build.Execution;
using Microsoft.Build.Framework;
using Microsoft.Build.Utilities;
using System.Reflection;
using System.IO;

namespace MicroBuildServer.DotNetBuilder
{
    static class Compiler
    {
        private class CompilerLogger : Logger
        {
            public readonly Messages Messages = new Messages();

            private int indent = 0;

            public override void Initialize(IEventSource eventSource)
            {
                if (eventSource == null)
                {
                    throw new ArgumentNullException("eventSource");
                }
                eventSource.ProjectStarted += OnProjectStarted;
                eventSource.ProjectFinished += OnProjectFinished;
                eventSource.ErrorRaised += OnError;
                eventSource.WarningRaised += OnWarning;
                eventSource.MessageRaised += OnMessage;
            }

            private void OnProjectStarted(object sender, ProjectStartedEventArgs e)
            {
                Messages.Add(Message.CreateInfo(GetLine("Started {0}", e.ProjectFile)));
                indent++;
            }

            private void OnProjectFinished(object sender, ProjectFinishedEventArgs e)
            {
                indent--;
                Messages.Add(Message.CreateInfo(GetLine("Finished {0}", e.ProjectFile)));
            }

            private void OnError(object sender, BuildErrorEventArgs e)
            {
                Messages.Add(Message.CreateError(GetLine("{0} (#{1}, {2}:{3},{4})", e.Message, e.Code, e.File, e.LineNumber, e.ColumnNumber)));
            }

            private void OnWarning(object sender, BuildWarningEventArgs e)
            {
                Messages.Add(Message.CreateWarn(GetLine("{0} (#{1}, {2}:{3},{4})", e.Message, e.Code, e.File, e.LineNumber, e.ColumnNumber)));
            }

            private void OnMessage(object sender, BuildMessageEventArgs e)
            {
                //if (e.Importance != MessageImportance.High) return;
                Messages.Add(Message.CreateInfo(GetLine("{0}: {1}", e.Importance, e.Message)));
            }

            private string GetLine(string format, params object[] args)
            {
                var result = new string('\t', indent) + string.Format(format, args);
                return result;
            }
        }

        public static readonly string BuilderAssemblyDirectory = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);

        public static Response Compile(CompileRequest request)
        {
            var logger = new CompilerLogger();
            logger.Verbosity = LoggerVerbosity.Detailed;

            var pc = new ProjectCollection();
            var globalProperty = new Dictionary<string, string>();
            globalProperty.Add("Configuration", request.Configuration ?? "Release");
            //globalProperty.Add("Platform", "AnyCPU");
            globalProperty.Add("VisualStudioVersion", "14.0");
            if (!string.IsNullOrEmpty(request.OutputDirectory))
            {
                globalProperty.Add("OutputDirectory", request.OutputDirectory);
            }
            if (!string.IsNullOrEmpty(request.SigningKey))
            {
                globalProperty.Add("SignAssembly", "true");
                globalProperty.Add("AssemblyOriginatorKeyFile", request.SigningKey);
            }
            if (!request.SkipCodeAnalysis)
            {
                globalProperty.Add("RunCodeAnalysis", "true");
                globalProperty.Add("CodeAnalysisRuleSet", Path.Combine(BuilderAssemblyDirectory, "AllRules.ruleset"));
                globalProperty.Add("MBSBuilderPath", BuilderAssemblyDirectory);
                globalProperty.Add("CustomBeforeMicrosoftCSharpTargets", Path.Combine(BuilderAssemblyDirectory, "ImportStyleCop.targets"));
            }
            else
            {
                globalProperty.Add("RunCodeAnalysis", "false");
                globalProperty.Add("CodeAnalysisRuleSet", string.Empty);
            }

            var buildRequest = new BuildRequestData(request.SolutionPath, globalProperty, "14.0", new [] { request.Target }, null);

            var parameters = new BuildParameters(pc);
            parameters.Loggers = new ILogger[] { logger };
            parameters.DetailedSummary = true;

            var buildResult = BuildManager.DefaultBuildManager.Build(parameters, buildRequest);
            if (buildResult.OverallResult == BuildResultCode.Failure)
            {
                logger.Messages.Add(Message.CreateError("BuildResult is false"));
            }

            return new Response(logger.Messages);
        }
    }
}