using System.Collections.Generic;

using System.IO;

using System.Linq;

using Common.Logging;

using ScriptCs.Contracts;

namespace ScriptCs

{

public class ScriptExecutor : IScriptExecutor

{

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

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

private readonly IFileSystem _fileSystem;

private readonly IFilePreProcessor _filePreProcessor;

private readonly IScriptEngine _scriptEngine;

private readonly ILog _logger;

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

{

_fileSystem = fileSystem;

_filePreProcessor = filePreProcessor;

_scriptEngine = scriptEngine;

_logger = logger;

}

public void Execute(string script, IEnumerable<string> paths, IEnumerable<IScriptPack> scriptPacks)

{

var bin = Path.Combine(_fileSystem.GetWorkingDirectory(script), "bin");

var references = DefaultReferences.Union(paths);

_scriptEngine.BaseDirectory = bin;

_logger.Debug("Initializing script packs");

var scriptPackSession = new ScriptPackSession(scriptPacks);

scriptPackSession.InitializePacks();

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

_logger.DebugFormat("File to process: {0}", path);

var code = _filePreProcessor.ProcessFile(path);

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

_scriptEngine.Execute(code, references, DefaultNamespaces, scriptPackSession);

_logger.Debug("Terminating packs");

scriptPackSession.TerminatePacks();

}

}

}