#ifndef FZL_EXTERN_H
#define FZL_EXTERN_H

#include <common/fzl_types.h>
#include <stdbool.h>
#include <stddef.h>

typedef enum
{
  FZL_EXTERN_KIND_HANDLE,
  FZL_EXTERN_KIND_STRUCT,
  FZL_EXTERN_KIND_REF,
  FZL_EXTERN_KIND_ALIAS,
} fzl_extern_kind_t;

// Type reference descriptor
typedef struct
{
  bool is_primitive;
  union
  {
    fzl_type_t primitive;
    size_t type_slot;
  };
} fzl_extern_type_ref_t;

// Structure field descriptor
typedef struct
{
  char *name;
  fzl_extern_type_ref_t type;
} fzl_extern_struct_field_t;

// Type descriptor
typedef struct
{
  size_t lib_slot;
  char *name;
  fzl_extern_kind_t kind;

  union
  {
    // Structure
    struct
    {
      fzl_extern_struct_field_t *fields;
      size_t fields_count;
    } structure;

    // Pointer (ref)
    fzl_extern_type_ref_t ref_target;

    // Alias
    fzl_extern_type_ref_t alias_target;
  };
} fzl_extern_type_t;

// Function argument descriptor
typedef struct
{
  char *name;
  fzl_extern_type_ref_t type;
  bool is_out;
} fzl_extern_arg_t;

// Function descriptor
typedef struct
{
  size_t lib_slot;
  char *symbol_name;
  char *used_name;

  bool has_return;
  fzl_extern_type_ref_t ret_type;

  fzl_extern_arg_t *args;
  size_t args_count;
} fzl_extern_fn_t;

// Library descriptor
typedef struct
{
  char *name;
} fzl_extern_lib_t;

#endif // FZL_EXTERN_H