#ifndef PIPELINE_H
#define PIPELINE_H

#include "vulkan/vulkan_core.h"
#include "cglm/types.h"
#include "vk_mem_alloc.h"
#include "command.h"

#include "ft2build.h"
#include FT_FREETYPE_H

typedef struct ComputePipelineStruct {
  VkPipelineLayout layout;
  VkPipeline pipeline;
} ComputePipeline;

typedef struct GraphicsPipelineStruct {
  VkPipelineLayout       layout;
  VkPipeline             pipeline;
} GraphicsPipeline;

typedef struct ColoredRectStruct {
  vec4 pos;
  vec2 size;
  vec4 color;
} ColoredRect;

typedef struct UIUniformStruct {
  mat4 screen;
} UIUniform;

typedef struct StringStruct {
  vec4 pos;
  vec4 color;
  float size;
  uint32_t offset;
  uint32_t length;
} String;

typedef struct DrawCommandStruct {
  uint32_t vertex_count;
  uint32_t instance_count;
  uint32_t first_vertex;
  uint32_t first_instance;
} DrawCommand;

typedef struct StringPointersStruct {
  VkDeviceAddress strings;
  VkDeviceAddress codes;
  VkDeviceAddress characters;
  VkDeviceAddress draw;
} StringPointers;

typedef struct CharacterStruct {
  vec4     pos;
  vec4     color;
  float    size;
  uint32_t code;
} Character;

typedef struct FontUniformStruct {
  uint32_t num_symbols;
  uint32_t width;
  uint32_t height;
  VkDeviceAddress symbol_list;
} FontUniform;

typedef struct SymbolInfoStruct {
  int32_t top;
  uint32_t left;
  uint32_t width;
  uint32_t height;
  uint32_t advance;
} SymbolInfo;

typedef struct FontDescriptorStruct {
  VmaAllocation symbol_memory;
  VmaAllocation uniform_memory;
  VmaAllocation image_memory;
  VkBuffer symbols;
  VkBuffer uniform;
  VkImage image;
  VkImageView view;
  VkSampler sampler;
  VkDescriptorSet set;
} FontDescriptor;

typedef struct TextPointersMemoryStruct {
  VmaAllocation pointers_memory;
  VmaAllocation draw_memory;
  VmaAllocation strings_memory;
  VmaAllocation codes_memory;
  VmaAllocation characters_memory;

  VkBuffer pointers_buffer;
  VkBuffer draw_buffer;
  VkBuffer strings_buffer;
  VkBuffer codes_buffer;
  VkBuffer characters_buffer;
} TextPointersMemory;

typedef struct UILayerStruct {
  VkDeviceAddress colored_rects;
  uint32_t        colored_rect_count;

  VkBuffer        string_draw;
  VkBuffer        chars;
  VkDeviceAddress string_pointers;
  uint32_t        string_count;
  uint32_t        chars_count;
  FontDescriptor  font;
} UILayer;

typedef struct UIContextStruct {
  VkBuffer ui_descriptor_buffer;
  VmaAllocation ui_descriptor_memory;
  VkDescriptorSetLayout ui_descriptor_layout;
  VkDescriptorPool ui_descriptor_pool;
  VkDescriptorSet ui_descriptor_set;

  VkDescriptorPool font_pool;
  VkDescriptorSetLayout font_layout;
 
  GraphicsPipeline ui_pipeline_rect;
  GraphicsPipeline ui_pipeline_text;
  ComputePipeline ui_compute_text;
} UIContext;


typedef struct UIFontStruct {
} UIFont;

typedef struct UITextStruct {
} UIText;

typedef struct UICharacterStruct {
} UICharacter;

typedef struct UIElementStruct {
  uint32_t type;
  uint32_t offset;
} UIElement;

typedef struct UIContainerStruct {
  VkDeviceAddress elements;
} UIContainer;

typedef struct UIStruct {
} UI;

VkResult init_pipelines(
    VkDevice device,
    VmaAllocator allocator,
    VkExtent2D swapchain_extent,
    vec2 window_scale,
    VkRenderPass render_pass,
    UIContext* context);

VkResult load_font(
    VkDevice device,
    VmaAllocator allocator,
    VkDescriptorSetLayout layout,
    VkDescriptorPool pool,
    VkCommandPool transfer_pool,
    Queue transfer_queue,
    FT_Library library,
    const char* ttf_file,
    uint32_t size,
    VkBool32 antialias,
    uint32_t** charmap,
    FontDescriptor* descriptor);

VkResult create_text_pointers(
    uint32_t max_strings,
    uint32_t max_characters,
    VkDevice device,
    VmaAllocator allocator,
    VkCommandPool transfer_pool,
    Queue transfer_queue,
    TextPointersMemory* memory,
    VkDeviceAddress* address);

#endif