#pragma once

#include <GL/gl.h>
#include <cglm/cglm.h>

#include "list.h"

#define GL_OK	  0
#define GL_ERROR  1
#define GL_RESULT int

#define MAX_VBOS 4

typedef struct {
	u32 vao;
	u32 ebo;
	u32 vbos[MAX_VBOS];
	i32 vbos_count;
	i32 vertex_count;
} Mesh;

void mesh_init(Mesh *mesh, u32 vertex_count);
void mesh_store_float(Mesh *mesh, float *data, u32 count, u32 dimensions);
void mesh_store_i32(Mesh *mesh, i32 *data, u32 count, u32 dimensions);
void mesh_store_u8(Mesh *mesh, u8 *data, u32 count, u32 dimensions);
void mesh_store_u32(Mesh *mesh, u32 *data, u32 count, u32 dimensions);
void mesh_store_indicies(Mesh *mesh, u16 *data, u32 count);
void mesh_finish(void);
void mesh_bind(Mesh *mesh);
void mesh_unbind(Mesh *mesh);
void mesh_draw(Mesh *mesh);
void mesh_draw_instanced(Mesh *mesh, u32 count);
void mesh_free(Mesh *mesh);

typedef struct {
	u32 id;
	u32 len;
} Uniform;

void uniform_init(Uniform *uniform, u32 len);
void uniform_store(Uniform *uniform, u32 offset, u32 len, void *data);
void uniform_bind(Uniform *uniform, u32 binding);
void uniform_unbind(u32 binding);
void uniform_free(Uniform *uniform);

typedef struct {
	u32 program_id;
	u32 vertex_id;
	u32 fragment_id;
	/* vertex attributes */
	List attribute_names;
	List attribute_locations;
	/* uniforms */
	List uniform_names;
	List uniform_locations;
	/* uniform blocks */
	List uniform_block_names;
	List uniform_block_indicies;
} Shader;

GL_RESULT shader_init(Shader *shader, const char *vertexFile, const char *fragmentFile);
void shader_bind(Shader *shader);
void shader_unbind(void);
void shader_free(Shader *shader);

i32 shader_attribute_location(Shader *shader, const char *name);
i32 shader_uniform_location(Shader *shader, const char *name);
i32 shader_uniform_block_index(Shader *shader, const char *name);

void shader_load_float(Shader *shader, const char *name, float value);
void shader_load_int(Shader *shader, const char *name, int value);
void shader_load_vec3(Shader *shader, const char *name, vec3 value);
void shader_load_ivec3(Shader *shader, const char *name, ivec3 value);
void shader_load_mat4(Shader *shader, const char *name, mat4 value);
void shader_load_ubo(Shader *shader, const char *name, u32 binding);