using System;

using System.Linq;

using Common.Logging;

using ScriptCs.Contracts;

using LogLevel = ScriptCs.Contracts.LogLevel;

namespace ScriptCs.Hosting

{

public class ScriptServicesBuilder : ServiceOverrides<IScriptServicesBuilder>, IScriptServicesBuilder

{

private IRuntimeServices _runtimeServices;

private readonly ITypeResolver _typeResolver;

private bool _repl;

private bool _cache;

private bool _debug;

private string _scriptName;

private LogLevel _logLevel;

private Type _scriptExecutorType;

private Type _scriptEngineType;

private ILog _logger;

public ScriptServicesBuilder(IConsole console, ILog logger, IRuntimeServices runtimeServices = null, ITypeResolver typeResolver = null, IInitializationServices initializationServices = null)

{

InitializationServices = initializationServices ?? new InitializationServices(logger);

_runtimeServices = runtimeServices;

_typeResolver = typeResolver;

_typeResolver = typeResolver ?? new TypeResolver();

ConsoleInstance = console;

_logger = logger;

}

public ScriptServices Build()

{

Type defaultExecutorType = typeof(ScriptExecutor);

_scriptExecutorType = Overrides.ContainsKey(typeof(IScriptExecutor)) ? (Type)Overrides[typeof(IScriptExecutor)] : defaultExecutorType;

_scriptEngineType = (Type)Overrides[typeof(IScriptEngine)];

var initDirectoryCatalog = _scriptName != null || _repl;

if (_runtimeServices == null)

{

_runtimeServices = new RuntimeServices(_logger, Overrides, ConsoleInstance,

_scriptEngineType, _scriptExecutorType,

initDirectoryCatalog,

InitializationServices, _scriptName);

}

return _runtimeServices.GetScriptServices();

}

private string GetEngineModule(string[] modules)

{

if (_typeResolver.ResolveType("Mono.Runtime") != null || modules.Contains("mono"))

{

return "mono";

}

return "roslyn";

}

public IScriptServicesBuilder LoadModules(string extension, params string[] moduleNames)

{

moduleNames = moduleNames.Union(new[] { GetEngineModule(moduleNames) }).ToArray();

var config = new ModuleConfiguration(_cache, _scriptName, _repl, _logLevel, _debug, Overrides);

var loader = InitializationServices.GetModuleLoader();

var fs = InitializationServices.GetFileSystem();

var folders = new[] { fs.ModulesFolder, fs.CurrentDirectory };

loader.Load(config, folders, InitializationServices.GetFileSystem().HostBin, extension, moduleNames);

return this;

}

public IScriptServicesBuilder Cache(bool cache = true)

{

_cache = cache;

return this;

}

public IScriptServicesBuilder ScriptName(string name)

{

_scriptName = name;

return this;

}

public IScriptServicesBuilder Repl(bool repl = true)

{

_repl = repl;

return this;

}

public IScriptServicesBuilder LogLevel(LogLevel level)

{

_logLevel = level;

return this;

}

public IScriptServicesBuilder Debug(bool debug = true)

{

_debug = debug;

return this;

}

public IInitializationServices InitializationServices { get; private set; }

public IConsole ConsoleInstance { get; private set; }

}

}