#ifndef PKE_FONT_TYPE_HPP
#define PKE_FONT_TYPE_HPP

#include "asset-manager.hpp"
#include "components.hpp"
#include "pk.h"

#include "vendor-glm-include.hpp"

TypeSafeInt_H(FontTypeIndex, uint16_t, 0xFFFF);
TypeSafeInt_H(FontRenderIndex, uint16_t, 0xFFFF);

enum FONT_GLYPH_CHAR_FLAGS : uint8_t {
	FONT_GLYPH_CHAR_FLAGS_NONE          = (0 << 0),
	FONT_GLYPH_CHAR_FLAGS_CONTROL       = (1 << 0),
	FONT_GLYPH_CHAR_FLAGS_WHITESPACE    = (1 << 1),
	FONT_GLYPH_CHAR_FLAGS_ALIGN_ADVANCE = (1 << 2),
	FONT_GLYPH_CHAR_FLAGS_NEW_LINE      = (1 << 3),
};

enum FONT_RENDER_SURFACE_AREA_TYPE_FLAGS : uint8_t {
	FONT_RENDER_SURFACE_AREA_TYPE_FLAGS_NONE = 0,
	FONT_RENDER_SURFACE_AREA_TYPE_FLAGS_GROW_VERTICAL   = (1 << 0),
	FONT_RENDER_SURFACE_AREA_TYPE_FLAGS_GROW_HORIZONTAL = (1 << 1),

	FONT_RENDER_SURFACE_AREA_TYPE_FLAGS_STATIC = 0,
	FONT_RENDER_SURFACE_AREA_TYPE_FLAGS_FLUID = (1 << 0) | (1 << 1),
};

struct FontRenderHandle {
	FontTypeIndex index_ft;
	FontRenderIndex index_fr;
};

struct FontGlyphChar {
	double advance;
	glm::vec2 sprite_region_min;
	glm::vec2 sprite_region_max;
	glm::dvec4 plane_bounds;
	uint32_t unicode;
	FONT_GLYPH_CHAR_FLAGS flags;
};
struct FontRenderSettings {
	float char_scale;
	float line_height_scale;
	float char_spacing_scale;
	glm::ivec2 surface_area_size; // TODO
	glm::ivec2 surface_area_pos;
	FONT_RENDER_SURFACE_AREA_TYPE_FLAGS surface_area_type_flags; // TODO
};
struct FontRender {
	FontRenderHandle handle;
	uint32_t *glyph_indices;
	uint32_t n_glyphs;
	uint32_t buffer_start_index;
	FontRenderSettings settings;
};
struct FontTypeMSDFSettings {
	float minimum_scale;
	float px_range;
};
struct FontTypeSpacing {
	double geometry_scale;
	double em_size;
	double ascender_y;
	double descender_y;
	double line_height;
	double underline_y;
	double underline_thickness;
};
struct FontType : public Entity_Base {
	uint64_t last_graphics_resize_index;
	pk_cstr title;
	AssetHandle fontTextureAssetHandle;
	AssetHandle glyphDetailsAssetHandle;
	FontGlyphChar *glyphs;
	FontRender *renders = nullptr;
	glm::vec2 atlas_size;
	uint32_t n_glyphs;
	FontRenderIndex n_render = FontRenderIndex{0};
	FontRenderIndex h_render = FontRenderIndex{0};
	FontTypeIndex index_ft = FontTypeIndex{0};
	struct FontTypeMSDFSettings msdf_settings;
	struct FontTypeSpacing spacing;
	struct FontTypeGraphics {
		VkDeviceMemory deviceMemoryVert = VK_NULL_HANDLE;
		VkDeviceMemory deviceMemoryTexture = VK_NULL_HANDLE;
		VkDeviceMemory deviceMemoryInst = VK_NULL_HANDLE;
		VkImage textureImage = VK_NULL_HANDLE;
		VkImageView textureImageView = VK_NULL_HANDLE;
		VkDescriptorPool vkDescriptorPool = VK_NULL_HANDLE;
		VkDescriptorSet *vkDescriptorSets = nullptr;
	} gr;
	struct FontTypeBindings {
		BufferBindingDetails vertexBD;
		BufferBindingDetails uvBD;
		BufferBindingDetails atlasSizeBD;
		BufferBindingDetails indexBD;
		BufferBindingDetails instanceBD;
		uint32_t indexCount = 0;
		uint32_t instanceCounter = 0;
		uint32_t instanceLength = 0;
	} bindings;
};

void FontType_Init();
void FontType_Teardown();
void FontType_Tick(double delta);
void FontType_Serialize(std::ofstream &stream, FontType *ft);
void FontType_Deserialize(std::ifstream &stream);
FontType* FontType_GetFonts(FontTypeIndex &count);
FontTypeIndex FontType_RegisterFont(pk_cstr title, AssetHandle fontTextureHandle, AssetHandle glyphsHandle, FontTypeMSDFSettings *msdf_settings, FontTypeSpacing *spacing);
void FontType_Unload(FontTypeIndex idx);
FontRenderHandle FontType_AddStringRender(FontTypeIndex idx_ft, pk_str str, FontRenderSettings *settings);
void FontType_RemoveStringRender(FontRenderHandle fr);

#endif /* PKE_FONT_TYPE_HPP */