#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 UIRectStruct {
  vec3 pos;
  float pad0;
  vec2 size;
  vec4 color;
} UIRect;

typedef struct StringStruct {
  vec3 pos;
  float pad0;
  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 DispatchCommandStruct {
  uint32_t x;
  uint32_t y;
  uint32_t z;
} DispatchCommand;

typedef struct CharacterStruct {
  vec3     pos;
  float    pad0;
  vec4     color;
  float    size;
  uint32_t code;
} Character;

typedef struct FontStruct {
  uint32_t num_symbols;
  uint32_t width;
  uint32_t height;
  VkDeviceAddress symbol_list;
} Font;

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

typedef struct FontStorageStruct {
  VmaAllocation symbol_memory;
  VmaAllocation image_memory;
  VkBuffer      symbols;
  VkImage       image;
  VkImageView   view;
  VkSampler     sampler;
  uint32_t      index;
} FontStorage;

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 UIlayerStorageStruct {
  VkBuffer        strings;
  VkBuffer        chars;
  VkBuffer        codes;
  VkBuffer        rects; 
  VkBuffer        layer;

  VmaAllocation strings_memory;
  VmaAllocation rects_memory;
  VmaAllocation chars_memory;
  VmaAllocation codes_memory;
  VmaAllocation layer_memory;

  VkDeviceAddress address;
} UILayerStorage;

typedef struct UILayerStruct {
  VkDeviceAddress rects;
  uint32_t        rect_count;

  VkDeviceAddress strings;
  uint32_t        font_index;

  DrawCommand     draw_chars;
  DrawCommand     draw_rects;
  DispatchCommand dispatch_strings;
} UILayer;

typedef struct UIContextStruct {
  mat4 screen;
  VkDeviceAddress font_infos;
} UIContext;

typedef struct UIContextStorageStruct {
  VkDeviceAddress address;

  VkBuffer context;

  VmaAllocation context_memory;

  VkBuffer font_infos;
  VmaAllocation font_infos_memory;
  VkDescriptorSet font_samplers;
  VkDescriptorSet font_textures;
  VkDescriptorSetLayout font_samplers_layout;
  VkDescriptorSetLayout font_textures_layout;
  VkDescriptorPool fonts_pool;
 
  GraphicsPipeline rect_pipeline;
  GraphicsPipeline char_pipeline;
  ComputePipeline string_pipeline;
} UIContextStorage;

VkResult create_ui_context(
    VkDevice device,
    VmaAllocator allocator,
    VkRenderPass render_pass,
    UIContextStorage* memory);

VkResult load_font(
    VkDevice device,
    VmaAllocator allocator,
    VkBuffer font_infos,
    VkDescriptorSet font_samplers,
    VkDescriptorSet font_textures,
    uint32_t last_index,
    VkCommandPool transfer_pool,
    Queue transfer_queue,
    FT_Library library,
    const char* ttf_file,
    uint32_t size,
    VkBool32 antialias,
    uint32_t** charmap,
    FontStorage* memory);

VkResult create_layer(
    uint32_t max_strings,
    uint32_t max_characters,
    uint32_t max_rects,
    VkDevice device,
    VmaAllocator allocator,
    VkCommandPool transfer_pool,
    Queue transfer_queue,
    UILayerStorage* memory,
    VkDeviceAddress* address);
#endif