#pragma once

#include <filesystem>
#include <unordered_map>
#include <unordered_set>
#include <vector>

#include <boost/property_tree/ptree.hpp>

#include "ProcessRunner.h"

class Builder
{
public:
 Builder(const boost::property_tree::ptree& ptree);

 void build();
 void clean() const;

private:
 std::vector<std::filesystem::path> dependencies_of(const std::filesystem::path& p) const;
 bool is_outdated(const std::filesystem::path& p) const;

 void build_file(const std::filesystem::path& p);
 void build_filelist();

 void cleanup();

 std::vector<std::filesystem::path> _all_targets;
 std::vector<std::filesystem::path> _all_objects;
 std::unordered_map<std::filesystem::path, std::vector<std::filesystem::path>> _dependencies;

 ProcessRunner _runner;

 std::unordered_set<std::filesystem::path> _buildlist; // build done
 std::unordered_set<std::filesystem::path> _activelist; // currently building
 std::unordered_set<std::filesystem::path> _donelist; // build done
};