#ifndef IMGUI_BITMAP_VIEWER_HH

#define IMGUI_BITMAP_VIEWER_HH

#include "ImGuiPart.hh"

#include "GLUtil.hh"

#include "gl_vec.hh"

#include <cstdint>

#include <optional>

#include <span>

#include <string>

namespace openmsx {

class ImGuiBitmapViewer final : public ImGuiPart

{

public:

	enum ScrnMode : int { SCR5, SCR6, SCR7, SCR8, SCR11, SCR12, OTHER }; // must be in sync with VDPCmdEngine 'scrnMode'

public:

	ImGuiBitmapViewer(ImGuiManager& manager_, size_t index);

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

	void save(ImGuiTextBuffer& buf) override;

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

	void paint(MSXMotherBoard* motherBoard) override;

private:

	void renderBitmap(std::span<const uint8_t> vram, std::span<const uint32_t, 16> palette16,

	                  int mode, int lines, int page, uint32_t* output) const;

public:

	bool show = true;

private:

	std::string title;

	int bitmapScrnMode = 0;

	int bitmapPage = 0; // 0-3 or 0-1 depending on screen mode, -1 for all pages   TODO extended VRAM

	int bitmapLines = 1; // 0->192, 1->212, 2->256

	int bitmapColor0 = 16; // 0..15, 16->no replacement

	int bitmapZoom = 0; // 0->1x, 1->2x, ..., 7->8x

	gl::vec4 bitmapGridColor{0.0f, 0.0f, 0.0f, 0.5f}; // RGBA

	gl::vec4 rasterBeamColor{1.0f, 0.0f, 0.0f, 0.8f}; // RGBA

	bool overrideAll    = false;

	bool overrideMode   = false;

	bool overridePage   = false;

	bool overrideLines  = false;

	bool overrideColor0 = false;

	bool bitmapGrid = true;

	bool rasterBeam = false;

	std::optional<gl::Texture> bitmapTex; // TODO also deallocate when needed

	std::optional<gl::Texture> bitmapGridTex;

	int showCmdOverlay = 0; // 0->none, 1->in-progress, 2->also finished

	gl::vec4 colorSrcDone{0.0f, 1.0f, 0.0f, 0.66f};

	gl::vec4 colorSrcTodo{0.0f, 1.0f, 0.0f, 0.33f};

	gl::vec4 colorDstDone{1.0f, 0.0f, 0.0f, 0.66f};

	gl::vec4 colorDstTodo{1.0f, 0.0f, 0.0f, 0.33f};

	static constexpr auto persistentElements = std::tuple{

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

		PersistentElement   {"overrideAll",    &ImGuiBitmapViewer::overrideAll},

		PersistentElement   {"overrideMode",   &ImGuiBitmapViewer::overrideMode},

		PersistentElement   {"overridePage",   &ImGuiBitmapViewer::overridePage},

		PersistentElement   {"overrideLines",  &ImGuiBitmapViewer::overrideLines},

		PersistentElement   {"overrideColor0", &ImGuiBitmapViewer::overrideColor0},

		PersistentElementMax{"scrnMode",       &ImGuiBitmapViewer::bitmapScrnMode, OTHER}, // SCR5..SCR12

		PersistentElement   {"page",           &ImGuiBitmapViewer::bitmapPage},

		PersistentElementMax{"lines",          &ImGuiBitmapViewer::bitmapLines, 3},

		PersistentElementMax{"color0",         &ImGuiBitmapViewer::bitmapColor0, 16 + 1},

		PersistentElementMax{"zoom",           &ImGuiBitmapViewer::bitmapZoom, 8},

		PersistentElement   {"showGrid",       &ImGuiBitmapViewer::bitmapGrid},

		PersistentElement   {"gridColor",      &ImGuiBitmapViewer::bitmapGridColor},

		PersistentElement   {"showRasterBeam", &ImGuiBitmapViewer::rasterBeam},

		PersistentElement   {"rasterBeamColor",&ImGuiBitmapViewer::rasterBeamColor},

		PersistentElementMax{"showCmdOverlay", &ImGuiBitmapViewer::showCmdOverlay, 3},

		PersistentElement   {"colorSrcDone",   &ImGuiBitmapViewer::colorSrcDone},

		PersistentElement   {"colorSrcTodo",   &ImGuiBitmapViewer::colorSrcTodo},

		PersistentElement   {"colorDstDone",   &ImGuiBitmapViewer::colorDstDone},

		PersistentElement   {"colorDstTodo",   &ImGuiBitmapViewer::colorDstTodo}

	};

};

} // namespace openmsx

#endif