#pragma once

#include <vector>
#include <memory>
#include <mutex>
#include <string>

class DepNode {
public:
	void addChild(std::shared_ptr<DepNode> node);
	bool hasChanged(const std::string &outDir);
	void build(const std::string &outDir);
	virtual std::vector<std::string> publicLDFlags(const std::string &outDir);
	virtual std::vector<std::string> publicLDLibs(const std::string &outDir);
	virtual std::vector<std::string> publicObjects(const std::string &outDir);

protected:
	enum class TriState {
		UNKNOWN, FALSE, TRUE,
	};

	virtual bool checkHasChanged(const std::string &outDir) = 0;
	virtual void doBuild(const std::string &outDir) = 0;
	virtual std::vector<std::string> getPublicLDFlags(const std::string &outDir) { return {}; }
	virtual std::vector<std::string> getPublicLDLibs(const std::string &outDir) { return {}; }
	virtual std::vector<std::string> getPublicObjects(const std::string &outDir) { return {}; }

	bool haveDepsChanged(const std::string &outDir);

	std::mutex mut_;
	TriState has_changed_ = TriState::UNKNOWN;
	bool was_rebuilt_ = false;
	bool was_prepared_ = false;
	std::vector<std::shared_ptr<DepNode>> deps_;
};