#ifndef CASSETTEIMAGE_HH

#define CASSETTEIMAGE_HH

#include "EmuTime.hh"

#include "sha1.hh"

#include <cstdint>

#include <span>

#include <string>

namespace openmsx {

class Filename;

class CassetteImage

{

public:

	enum class FileType : uint8_t { ASCII, BINARY, BASIC, UNKNOWN };

	virtual ~CassetteImage() = default;

	[[nodiscard]] virtual int16_t getSampleAt(EmuTime time) const = 0;

	[[nodiscard]] virtual EmuTime getEndTime() const = 0;

	[[nodiscard]] virtual unsigned getFrequency() const = 0;

	virtual void fillBuffer(unsigned pos, std::span<float*, 1> bufs, unsigned num) const = 0;

	[[nodiscard]] virtual float getAmplificationFactorImpl() const = 0;

	[[nodiscard]] FileType getFirstFileType() const { return firstFileType; }

	[[nodiscard]] std::string getFirstFileTypeAsString() const;

	/** Get sha1sum for this image.

	 * This is based on the content of the file, not the logical meaning of

	 * the file. IOW: it's possible for different files (with different

	 * sha1sum) to represent the same logical cassette data (e.g. wav with

	 * different bits per sample). This method will give a different

	 * sha1sum to such files.

	 */

	[[nodiscard]] const Sha1Sum& getSha1Sum() const;

protected:

	CassetteImage() = default;

	// Please make sure this method is called from the constructor of each

	// subclass! (And only from there.)

	void setFirstFileType(FileType type, const Filename& fileName);

	void setSha1Sum(const Sha1Sum& sha1sum);

private:

	FileType firstFileType = FileType::UNKNOWN;

	Sha1Sum sha1sum;

};

} // namespace openmsx

#endif