// Generate Makefile for cppcheck

#include <algorithm>
#include <fstream>
#include <iostream>
#include <string>
#include <vector>
#include "../src/filelister.h"

std::string objfile(std::string cppfile)
{
	cppfile.erase( cppfile.rfind(".") );
	return cppfile + ".o";
}

void getDeps(const std::string &filename, std::vector<std::string> &depfiles)
{
	std::ifstream f( filename.c_str() );
	if ( ! f.is_open() )
		return;

	std::string path( filename );
	if ( path.find("/") != std::string::npos )
		path.erase( 1 + path.rfind("/") );

	std::string line;
	while ( std::getline(f, line) )
	{
		std::string::size_type pos1 = line.find("#include \"");
		if ( pos1 == std::string::npos )
			continue;
		pos1 += 10;

		std::string::size_type pos2 = line.find("\"", pos1);
		std::string hfile( path + line.substr(pos1, pos2-pos1) );
		if ( hfile.find("/../") != std::string::npos )	// TODO: Ugly fix
			hfile.erase( 0, 4+hfile.find("/../") );
		if (std::find(depfiles.begin(), depfiles.end(), hfile) != depfiles.end())
			continue;
		depfiles.push_back( hfile );
		getDeps(hfile, depfiles);
	}
}

int main()
{
	// Get files..
	std::vector<std::string> srcfiles;
	FileLister::RecursiveAddFiles( srcfiles, "src/", true );
	std::vector<std::string> testfiles;
	FileLister::RecursiveAddFiles( testfiles, "test/", true );

	std::ofstream fout("Makefile");

	fout << "CXXFLAGS=-Wall -pedantic -g\n\n";

	fout << "\n###### Object Files\n\n";
	fout << "OBJECTS =     " << objfile(srcfiles[0]);
	for ( unsigned int i = 1; i < srcfiles.size(); ++i )
		fout << " \\" << std::endl << std::string(14,' ') << objfile(srcfiles[i]);
	fout << "\n\n";
	fout << "TESTOBJ =     " << objfile(testfiles[0]);
	for ( unsigned int i = 1; i < testfiles.size(); ++i )
		fout << " \\" << std::endl << std::string(14,' ') << objfile(testfiles[i]);
	for ( unsigned int i = 0; i < srcfiles.size(); ++i )
	{
		if ( srcfiles[i] != "src/main.cpp" )
			fout << " \\" << std::endl << std::string(14,' ') << objfile(srcfiles[i]);
	}
	fout << "\n\n";


	fout << "\n###### Targets\n\n";
	fout << "cppcheck:\t$(OBJECTS)\n";
	fout << "\tg++ $(CXXFLAGS) -o cppcheck $(OBJECTS)\n\n";
	fout << "testrunner:\t$(TESTOBJ)\n";
	fout << "\tg++ $(CXXFLAGS) -o testrunner $(TESTOBJ)\n\n";
	fout << "all:\tcppcheck\ttestrunner\n\n";
	fout << "test:\ttestrunner\n\n";
	fout << "clean:\n";
	fout << "\trm -f src/*.o test/*.o testrunner cppcheck\n\n";
	fout << "install:\tcppcheck\n";
	fout << "\tinstall -d ${BIN}\n";
	fout << "\tinstall cppcheck ${BIN}\n\n";

	fout << "\n###### Build\n\n";

	for ( unsigned int i = 0; i < srcfiles.size(); ++i )
	{
		fout << objfile(srcfiles[i]) << ": " << srcfiles[i];
		std::vector<std::string> depfiles;
		getDeps( srcfiles[i], depfiles );
		for ( unsigned int dep = 0; dep < depfiles.size(); ++dep )
			fout << " " << depfiles[dep];
		fout << "\n\tg++ $(CXXFLAGS) -c -o " << objfile(srcfiles[i]) << " " << srcfiles[i] << "\n\n";
	}

	for ( unsigned int i = 0; i < testfiles.size(); ++i )
	{
		fout << objfile(testfiles[i]) << ": " << testfiles[i];
		std::vector<std::string> depfiles;
		getDeps( testfiles[i], depfiles );
		for ( unsigned int dep = 0; dep < depfiles.size(); ++dep )
			fout << " " << depfiles[dep];
		fout << "\n\tg++ $(CXXFLAGS) -c -o " << objfile(testfiles[i]) << " " << testfiles[i] << "\n\n";
	}


	return 0;
}