/*
 * Copyright 2016 - 2022 Gary Talent (gary@drinkingtea.net). All rights reserved.
 */

#pragma once

#include <ox/model/def.hpp>

#include <nostalgia/common/bounds.hpp>
#include <nostalgia/core/gfx.hpp>
#include <nostalgia/glutils/glutils.hpp>
#include <nostalgia/studio/studio.hpp>

#include "tilesheetpixelgrid.hpp"
#include "tilesheetpixels.hpp"

namespace nostalgia::core {

// Command IDs to use with QUndoCommand::id()
enum class CommandId {
	UpdatePixel = 1,
	ModPixel = 2,
	UpdateDimension = 3,
	InsertTile = 4,
	ClipboardPaste = 5,
};

enum class TileSheetTool: int {
	Select,
	Draw,
	Fill,
};

[[nodiscard]]
constexpr auto toString(TileSheetTool t) noexcept {
	switch (t) {
		case TileSheetTool::Select:
			return "Select";
		case TileSheetTool::Draw:
			return "Draw";
		case TileSheetTool::Fill:
			return "Fill";
	}
	return "";
}

struct PixelChunk {
	static constexpr auto TypeName = "net.drinkingtea.nostalgia.core.studio.PixelChunk";
	static constexpr auto TypeVersion = 1;
	common::Point pt;
	int size = 0;
};

oxModelBegin(PixelChunk)
	oxModelField(pt)
	oxModelField(size)
oxModelEnd()

struct TileSheetClipboard {
	static constexpr auto TypeName = "net.drinkingtea.nostalgia.core.studio.TileSheetClipboard";
	static constexpr auto TypeVersion = 1;

	oxModelFriend(TileSheetClipboard);

	protected:
		ox::Vector<int> m_pixels;
		common::Point m_p1;
		common::Point m_p2;

	public:
		void addPixel(int color);

		[[nodiscard]]
		bool empty() const;

		void pastePixels(const common::Point &pt, ox::Vector<int> *tgt, int tgtColumns) const;

		void setPoints(const common::Point &p1, const common::Point &p2);

		[[nodiscard]]
		common::Point point1() const;

		[[nodiscard]]
		common::Point point2() const;

};

template<typename T>
ox::Error model(T *io, TileSheetClipboard *b) {
	io->template setTypeInfo<TileSheetClipboard>();
	oxReturnError(io->field("pixels", &b->m_pixels));
	oxReturnError(io->field("p1", &b->m_p1));
	oxReturnError(io->field("p2", &b->m_p2));
	return OxError(0);
}

class TileSheetEditor: public studio::Editor {

	private:
		ox::String m_itemPath;
		ox::String m_itemName;
		glutils::FrameBuffer m_framebuffer;
		TileSheetGrid m_pixelGrid;
		TileSheetPixels m_pixels;
		bool m_updated = false;
		NostalgiaGraphic m_img;
		AssetRef<NostalgiaPalette> m_pal;
		Context *m_ctx = nullptr;
		float m_pixelSizeMod = 1;

	public:
		TileSheetEditor(Context *ctx, const ox::String &path);

		~TileSheetEditor() override = default;

		ox::String itemName() const noexcept override;

		ox::String itemDisplayName() const noexcept override;

		void exportFile() override;

		void cut() override;

		void copy() override;

		void paste() override;

		void draw(core::Context*) noexcept override;

		void glDraw() noexcept;

	protected:
		void saveItem() override;

	private:
		void setPalette();

		void saveState();

		void restoreState();

		[[nodiscard]]
		ox::String paletteName(const ox::String &palettePath) const;

		[[nodiscard]]
		ox::String palettePath(const ox::String &palettePath) const;

	// slots
	public:
		ox::Error colorSelected() noexcept;

		ox::Error setColorTable() noexcept;

	// slots
	private:
		ox::Error updateAfterClicked() noexcept;

};

}