//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
//
// copyright            : (C) 2008 by Eran Ifrah
// file name            : vcimporter.cpp
//
// -------------------------------------------------------------------------
// A
//              _____           _      _     _ _
//             /  __ \         | |    | |   (_) |
//             | /  \/ ___   __| | ___| |    _| |_ ___
//             | |    / _ \ / _  |/ _ \ |   | | __/ _ )
//             | \__/\ (_) | (_| |  __/ |___| | ||  __/
//              \____/\___/ \__,_|\___\_____/_|\__\___|
//
//                                                  F i l e
//
//    This program is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation; either version 2 of the License, or
//    (at your option) any later version.
//
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
#include "vcimporter.h"
#include "wx/filename.h"
#include "macros.h"
#include "wx/tokenzr.h"
#include "workspace.h"
#include "xmlutils.h"

#define NEXT_LINE(line)\
	line.Empty();\
	if(!ReadLine(line)){\
		return false;\
	}

VcImporter::VcImporter(const wxString &fileName, const wxString &defaultCompiler)
		: m_fileName(fileName)
		, m_is      (NULL)
		, m_tis     (NULL)
		, m_compiler(defaultCompiler)
		, m_compilerLowercase(defaultCompiler)
{
	m_compilerLowercase.MakeLower();

	wxFileName fn(m_fileName);
	m_isOk = fn.FileExists();
	if (m_isOk) {
		m_is = new wxFileInputStream(fn.GetFullPath());
		m_tis = new wxTextInputStream(*m_is);
	}
}

VcImporter::~VcImporter()
{
	if (m_is) {
		delete m_is;
	}
	if (m_tis) {
		delete m_tis;
	}
}

bool VcImporter::ReadLine(wxString &line)
{
	line = wxEmptyString;
	if (m_isOk) {
		while (!m_is->Eof()) {
			line = m_tis->ReadLine();
			TrimString(line);
			if (line.Length() == 1 || line.Length() == 2 || line.IsEmpty() || line.StartsWith(wxT("#"))) {
				//get next line
				continue;
			} else {
				return true;
			}
		}
	}
	return false;
}

bool VcImporter::Import(wxString &errMsg)
{
	wxString line;
	while (true) {
		if (!ReadLine(line))
			break;
		if (line.StartsWith(wxT("Project"))) {
			if (!OnProject(line, errMsg)) {
				return false;
			}
		}
	}

	//create LE files
	CreateWorkspace();
	CreateProjects();
	return true;
}

bool VcImporter::OnProject(const wxString &firstLine, wxString &errMsg)
{
	//first line contains the project name, project file path, and project id
	wxStringTokenizer tkz(firstLine, wxT("="));
	if (tkz.CountTokens() != 2) {
		errMsg = wxT("Invalid 'Project' section found. expected <expr> = <expr>");
		return false;
	}

	tkz.NextToken();
	wxString token = tkz.NextToken();
	TrimString(token);
	wxStringTokenizer tk2(token, wxT(","));
	if (tk2.CountTokens() != 3) {
		errMsg = wxT("Invalid 'Project' section found. expected <project name>, <project file path>, <project id>");
		return false;
	}

	VcProjectData pd;

	pd.name = tk2.NextToken();
	RemoveGershaim(pd.name);

	pd.filepath = tk2.NextToken();
	RemoveGershaim(pd.filepath);

	// Make sure that the project path has a forward slash style
	pd.filepath.Replace(wxT("\\"), wxT("/"));

	pd.id = tk2.NextToken();
	RemoveGershaim(pd.id);
    
    std::pair<wxString, VcProjectData> p;
    p.first = pd.id;
    p.second = pd;
	m_projects.insert( p );
	//Skip all lines until EndProject section is found
	wxString line;
	while (true) {
		NEXT_LINE(line);
		if (line == wxT("EndProject")) {
			return true;
		}
	}
	return false;
}

void VcImporter::RemoveGershaim(wxString &str)
{
	TrimString(str);
	str = str.AfterFirst(wxT('"'));
	str = str.BeforeLast(wxT('"'));
}

void VcImporter::CreateWorkspace()
{
	//create a workspace file from the data we collected
	wxFileName fn(m_fileName);
	wxString errMsg;
	WorkspaceST::Get()->CreateWorkspace(fn.GetName(), fn.GetPath(), errMsg);
}

//
//ConfigurationType = 1 // exe
//ConfigurationType = 2 // dll
//ConfigurationType = 4 // static lib
//
void VcImporter::CreateProjects()
{
	std::map<wxString, VcProjectData>::iterator iter = m_projects.begin();
	for (; iter != m_projects.end(); iter++) {
		//load xml file
		VcProjectData pd = iter->second;
		ConvertProject(pd);
	}
}

bool VcImporter::ConvertProject(VcProjectData &data)
{
	wxXmlDocument doc(data.filepath);
	if (!doc.IsOk()) {
		return false;
	}

	//to create a project skeleton, we need the project type
	//since VS allows each configuration to be of different
	//type, while LE allows single type for all configurations
	//we use the first configuration type that we find
	wxXmlNode *configs = XmlUtils::FindFirstByTagName(doc.GetRoot(), wxT("Configurations"));
	if (!configs) {
		return false;
	}

	//find the first configuration node
	wxXmlNode * config = XmlUtils::FindFirstByTagName(configs, wxT("Configuration"));
	if (!config)	return false;
	//read the configuration type, default is set to Executeable
	long type = XmlUtils::ReadLong(config, wxT("ConfigurationType"), 1);
	wxString projectType;
	wxString errMsg;
	switch (type) {
	case 2: //dll
		projectType = Project::DYNAMIC_LIBRARY;
		break;
	case 4:	//static library
		projectType = Project::STATIC_LIBRARY;
		break;
	case 1:	//exe
	default:
		projectType = Project::EXECUTABLE;
		break;
	}
	//now we can create the project
	wxFileName fn(data.filepath);
	fn.MakeAbsolute();
	if (!WorkspaceST::Get()->CreateProject(data.name, fn.GetPath(), projectType, true, errMsg)) {
		return false;
	}

	//get the new project instance
	ProjectPtr proj = WorkspaceST::Get()->FindProjectByName(data.name, errMsg);
	ProjectSettingsPtr le_settings(new ProjectSettings(NULL));
	//remove the default 'Debug' configuration
	le_settings->RemoveConfiguration(wxT("Debug"));
	le_settings->SetProjectType(projectType);

	while (config) {
		if (config->GetName() == wxT("Configuration")) {
			AddConfiguration(le_settings, config);
		}
		config = config->GetNext();
	}
	proj->SetSettings(le_settings);
	//add all virtual folders
	wxXmlNode *files = XmlUtils::FindFirstByTagName(doc.GetRoot(), wxT("Files"));
	if (files) {
		proj->BeginTranscation();
		CreateFiles(files, wxEmptyString, proj);
		proj->CommitTranscation();
	}
	return true;
}

void VcImporter::AddConfiguration(ProjectSettingsPtr settings, wxXmlNode *config)
{
	//configuration name
	wxString name = XmlUtils::ReadString(config, wxT("Name"));
	name = name.BeforeFirst(wxT('|'));
	name.Replace(wxT(" "), wxT("_"));

	BuildConfigPtr le_conf(new BuildConfig(NULL));
	le_conf->SetName(name);
	le_conf->SetIntermediateDirectory(XmlUtils::ReadString(config, wxT("IntermediateDirectory")));
	//get the compiler settings
	wxXmlNode *cmpNode = XmlUtils::FindNodeByName(config, wxT("Tool"), wxT("VCCLCompilerTool"));
	//get the include directories
	le_conf->SetIncludePath(SplitString(XmlUtils::ReadString(cmpNode, wxT("AdditionalIncludeDirectories"))));
	le_conf->SetPreprocessor(XmlUtils::ReadString(cmpNode, wxT("PreprocessorDefinitions")));

	// Select the best compiler for the import process (we select g++ by default)
	le_conf->SetCompilerType(m_compiler);

	// Get the configuration type
	long type = XmlUtils::ReadLong(config, wxT("ConfigurationType"), 1);
	wxString projectType;
	wxString errMsg;
	switch (type) {
	case 2: //dll
		projectType = Project::DYNAMIC_LIBRARY;
		break;
	case 4:	//static library
		projectType = Project::STATIC_LIBRARY;
		break;
	case 1:	//exe
	default:
		projectType = Project::EXECUTABLE;
		break;
	}

	le_conf->SetProjectType(projectType);

	//if project type is DLL or Executable, copy linker settings as well
	if (settings->GetProjectType(le_conf->GetName()) == Project::EXECUTABLE || settings->GetProjectType(le_conf->GetName()) == Project::DYNAMIC_LIBRARY) {
		wxXmlNode *linkNode = XmlUtils::FindNodeByName(config, wxT("Tool"), wxT("VCLinkerTool"));
		if (linkNode) {
			wxString outputFileName (XmlUtils::ReadString(linkNode, wxT("OutputFile")) );
#ifndef __WXMSW__
			outputFileName.Replace(wxT(".dll"), wxT(".so"));
			outputFileName.Replace(wxT(".exe"), wxT(""));
#endif

			le_conf->SetOutputFileName(outputFileName);

			// read in the additional libraries & libpath
			wxString libs = XmlUtils::ReadString(linkNode, wxT("AdditionalDependencies"));

			// libs is a space delimited string
			wxStringTokenizer tk(libs, wxT(" "));
			libs.Empty();
			while (tk.HasMoreTokens()) {
				libs << tk.NextToken() << wxT(";");
			}
			le_conf->SetLibraries(libs);
			le_conf->SetLibPath(XmlUtils::ReadString(linkNode, wxT("AdditionalLibraryDirectories")));
		}
	} else {
		// static library
		wxXmlNode *libNode = XmlUtils::FindNodeByName(config, wxT("Tool"), wxT("VCLibrarianTool"));
		if (libNode) {

			wxString outputFileName (XmlUtils::ReadString(libNode, wxT("OutputFile")) );
			outputFileName.Replace(wxT("\\"), wxT("/"));

			wxString outputFileNameOnly = outputFileName.AfterLast(wxT('/'));
			wxString outputFilePath     = outputFileName.BeforeLast(wxT('/'));

			if(m_compilerLowercase.Contains(wxT("gnu"))) {
				if(outputFileNameOnly.StartsWith(wxT("lib")) == false) {
					outputFileNameOnly.Prepend(wxT("lib"));
				}
				outputFileName.Clear();
				outputFileName << outputFilePath << wxT("/") << outputFileNameOnly;
				outputFileName.Replace(wxT(".lib"), wxT(".a"));
			}
			le_conf->SetOutputFileName(outputFileName);
		}
	}

	//add the configuration
	settings->SetBuildConfiguration(le_conf);
}

void VcImporter::CreateFiles(wxXmlNode *parent, wxString vdPath, ProjectPtr proj)
{
	if ( !parent ) {
		return;
	}

	wxXmlNode *child = parent->GetChildren();
	while (child) {
		if (child->GetName() == wxT("Filter")) {
			// add new virtual directory
			wxString name = XmlUtils::ReadString(child, wxT("Name"));
			wxString tmpPath = vdPath;
			if (tmpPath.IsEmpty() == false) {
				tmpPath << wxT(":");
			}
			tmpPath << name;
			proj->CreateVirtualDir(tmpPath);
			CreateFiles(child, tmpPath, proj);

		} else if (child->GetName() == wxT("File")) {
			//found a file
			wxString fileName = XmlUtils::ReadString(child, wxT("RelativePath"));
			wxString path = vdPath;
			if (path.IsEmpty()) {
				path = wxT("src");
			}

			fileName.Replace(wxT("\\"), wxT("/"));
			proj->AddFile(fileName, path);
		}
		child = child->GetNext();
	}
}

wxArrayString VcImporter::SplitString(const wxString &s)
{
	wxArrayString arr;
	wxString s1(s);
	s1.Replace(wxT(","), wxT(";"));
	wxStringTokenizer tk1(s1, wxT(";"));
	while (tk1.HasMoreTokens()) {
		arr.Add(tk1.NextToken());
	}
	return arr;
}