#ifndef IMGUI_SYMBOLS_HH

#define IMGUI_SYMBOLS_HH

#include "ImGuiPart.hh"

#include "SymbolManager.hh"

#include <cstdint>

#include <optional>

#include <vector>

namespace openmsx {

struct SymbolRef {

	unsigned fileIdx;

	unsigned symbolIdx;

	[[nodiscard]] std::string_view           file(const SymbolManager& m) const { return m.getFiles()[fileIdx].filename; }

	[[nodiscard]] const std::string&         name(const SymbolManager& m) const { return m.getFiles()[fileIdx].symbols[symbolIdx].name; }

	[[nodiscard]] uint16_t                  value(const SymbolManager& m) const { return m.getFiles()[fileIdx].symbols[symbolIdx].value; }

	[[nodiscard]] std::optional<uint8_t>     slot(const SymbolManager& m) const { return m.getFiles()[fileIdx].symbols[symbolIdx].slot; }

	[[nodiscard]] std::optional<uint16_t> segment(const SymbolManager& m) const { return m.getFiles()[fileIdx].symbols[symbolIdx].segment; }

};

class ImGuiSymbols final : public ImGuiPart, private SymbolObserver

{

public:

	struct FileInfo {

		std::string filename;

		std::string error;

		SymbolFile::Type type;

		std::optional<uint8_t> slot;

		std::optional<uint16_t> segment;

	};

	explicit ImGuiSymbols(ImGuiManager& manager);

	~ImGuiSymbols();

	[[nodiscard]] zstring_view iniName() const override { return "symbols"; }

	void save(ImGuiTextBuffer& buf) override;

	void loadStart() override;

	void loadLine(std::string_view name, zstring_view value) override;

	void loadEnd() override;

	void paint(MSXMotherBoard* motherBoard) override;

public:

	bool show = false;

private:

	void loadFile(const std::string& filename, SymbolManager::LoadEmpty loadEmpty, SymbolFile::Type type,

	              std::optional<uint8_t> slot, std::optional<uint16_t> segment);

	template<bool FILTER_FILE>

	void drawTable(MSXMotherBoard* motherBoard, const std::string& file = {});

	void checkSort();

	void drawContext(MSXMotherBoard* motherBoard, const SymbolRef& sym);

	// SymbolObserver

	void notifySymbolsChanged() override;

private:

	SymbolManager& symbolManager;

	std::vector<SymbolRef> symbols;

	std::vector<FileInfo> fileError;

	struct SortState {

		int columnIndex = -1;

		ImGuiSortDirection direction = ImGuiSortDirection_None;

	} sortState;

	static constexpr auto persistentElements = std::tuple{

		PersistentElement{"show", &ImGuiSymbols::show}

	};

};

} // namespace openmsx

#endif