using System.Collections.Generic;

using System.IO;

using System.Linq;

using Common.Logging;

using ScriptCs.Contracts;

namespace ScriptCs

{

public class ScriptExecutor : IScriptExecutor

{

public static readonly string[] DefaultReferences = new[] { "System", "System.Core", "System.Data", "System.Data.DataSetExtensions", "System.Xml", "System.Xml.Linq" };

public static readonly string[] DefaultNamespaces = new[] { "System", "System.Collections.Generic", "System.Linq", "System.Text", "System.Threading.Tasks", "System.IO" };

public IFileSystem FileSystem { get; private set; }

public IFilePreProcessor FilePreProcessor { get; private set; }

public IScriptEngine ScriptEngine { get; private set; }

public ILog Logger { get; private set; }

public IEnumerable<string> References { get; protected set; }

public ScriptPackSession ScriptPackSession { get; protected set; }

public ScriptExecutor(IFileSystem fileSystem, IFilePreProcessor filePreProcessor, IScriptEngine scriptEngine, ILog logger)

{

FileSystem = fileSystem;

FilePreProcessor = filePreProcessor;

ScriptEngine = scriptEngine;

Logger = logger;

}

public virtual void Initialize(IEnumerable<string> paths, IEnumerable<IScriptPack> scriptPacks)

{

References = DefaultReferences.Union(paths);

var bin = Path.Combine(FileSystem.CurrentDirectory, "bin");

ScriptEngine.BaseDirectory = bin;

Logger.Debug("Initializing script packs");

var scriptPackSession = new ScriptPackSession(scriptPacks);

scriptPackSession.InitializePacks();

ScriptPackSession = scriptPackSession;

}

public virtual void Terminate()

{

Logger.Debug("Terminating packs");

ScriptPackSession.TerminatePacks();

}

public virtual ScriptResult Execute(string script)

{

return Execute(script, new string[0]);

}

public virtual ScriptResult Execute(string script, string[] scriptArgs)

{

var path = Path.IsPathRooted(script) ? script : Path.Combine(FileSystem.CurrentDirectory, script);

var result = FilePreProcessor.ProcessFile(path);

var references = References.Union(result.References);

Logger.Debug("Starting execution in engine");

return ScriptEngine.Execute(result.Code, scriptArgs, references, DefaultNamespaces, ScriptPackSession);

}

}

}