#ifndef IPSPATCH_HH

#define IPSPATCH_HH

#include "PatchInterface.hh"

#include "Filename.hh"

#include "MemBuffer.hh"

#include <memory>

#include <vector>

namespace openmsx {

class IPSPatch final : public PatchInterface

{

public:

	IPSPatch(Filename filename,

	         std::unique_ptr<const PatchInterface> parent);

	void copyBlock(size_t src, std::span<uint8_t> dst) const override;

	[[nodiscard]] size_t getSize() const override { return size; }

	[[nodiscard]] std::vector<Filename> getFilenames() const override;

private:

	struct Chunk {

		size_t startAddress;

		MemBuffer<uint8_t> content;

		[[nodiscard]] size_t size() const { return content.size(); }

		[[nodiscard]] size_t stopAddress() const { return startAddress + size(); }

		[[nodiscard]] auto begin() const { return content.begin(); }

		[[nodiscard]] auto end  () const { return content.end(); }

	};

	const Filename filename;

	const std::unique_ptr<const PatchInterface> parent;

	const std::vector<Chunk> chunks; // sorted on startAddress

	const size_t size;

private:

	// Helper functions called from constructor

	[[nodiscard]] std::vector<Chunk> parseChunks() const;

	[[nodiscard]] size_t calcSize() const;

};

} // namespace openmsx

#endif