#ifndef HONEYSUCKLE_H
#define HONEYSUCKLE_H

#include <stdbool.h>

#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>

#include "va_nargs.h"

/* type constants */
typedef enum
  { HS_BOOL,
    HS_INT,
    HS_NUM,
    HS_STR,
    HS_TBL,
    HS_FUNC,
    HS_CFUNC,
    HS_USER,
    HS_LIGHT,
    HS_NIL,
    HS_ANY,
  } hs_type;

const char* hs_type_to_string(hs_type type);

/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * hs_parse_args and hs_parse_overloaded
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

struct hs_arg {
  hs_type type;
  union {
    bool *boolean;
    lua_Integer *integer;
    lua_Number *number;
    char **string;
    int *stack_index;
    lua_CFunction *function;
    void **userdata;
  } ptr;
};

#define hs_bool(x)  { .type=HS_BOOL,  .ptr.boolean = &(x) }
#define hs_int(x)   { .type=HS_INT,   .ptr.integer = &(x) }
#define hs_num(x)   { .type=HS_NUM,   .ptr.number = &(x) }
#define hs_str(x)   { .type=HS_STR,   .ptr.string = &(x) }
#define hs_tbl(x)   { .type=HS_TBL,   .ptr.stack_index = &(x) }
#define hs_func(x)  { .type=HS_FUNC,  .ptr.stack_index = &(x) }
#define hs_cfunc(x) { .type=HS_CFUNC, .ptr.function = &(x) }
#define hs_user(x)  { .type=HS_USER,  .ptr.userdata = &(x) }
#define hs_light(x) { .type=HS_LIGHT, .ptr.userdata = &(x) }
#define hs_nil(x)   { .type=HS_NIL,   .ptr.stack_index = &(x) }
#define hs_any(x)   { .type=HS_ANY,   .ptr.stack_index = &(x) }

void hs_parse_args_(lua_State *L, int n_args, struct hs_arg *arguments);

#define hs_parse_args(L, ...)				\
   hs_parse_args_(L,					\
		  VA_NARGS(__VA_ARGS__)/2,		\
		 (struct hs_arg[]) { __VA_ARGS__ })


#define hs_overload(...) VA_NARGS(__VA_ARGS__)/2, (struct hs_arg[]) { __VA_ARGS__ }

int hs_parse_overloaded_(lua_State *L, ...);

#define hs_parse_overloaded(L, ...)		\
   hs_parse_overloaded_(L, __VA_ARGS__, -1)

/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * hs_create_table
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

struct hs_tbl_entry {
   hs_type key_type;
   union {
      bool boolean;
      lua_Integer integer;
      lua_Number number;
      char *string;
      int stack_index;
      lua_CFunction function;
      void *userdata;
   } key;
   hs_type value_type;
   union {
      bool boolean;
      lua_Integer integer;
      lua_Number number;
      char *string;
      int stack_index;
      lua_CFunction function;
      void *userdata;
   } value;
};

#define hs_bool_bool(k, v)				\
   { .key_type=HS_BOOL, .key.boolean=k,			\
	 .value_type=HS_BOOL, .value.boolean=v }
#define hs_bool_int(k, v)			\
   { .key_type=HS_BOOL, .key.boolean=k,		\
	 .value_type=HS_INT, .value.integer=v }
#define hs_bool_num(k, v)			\
   { .key_type=HS_BOOL, .key.boolean=k,		\
	 .value_type=HS_NUM, .value.number=v }
#define hs_bool_str(k, v)			\
   { .key_type=HS_BOOL, .key.boolean=k,		\
	 .value_type=HS_STR, .value.string=v }
#define hs_bool_tbl(k, v)				\
   { .key_type=HS_BOOL, .key.boolean=k,			\
	 .value_type=HS_TBL, .value.stack_index=v }
#define hs_bool_func(k, v)				\
   { .key_type=HS_BOOL, .key.boolean=k,			\
	 .value_type=HS_FUNC, .value.stack_index=v }
#define hs_bool_cfunc(k, v)				\
   { .key_type=HS_BOOL, .key.boolean=k,			\
	 .value_type=HS_CFUNC, .value.function=v }
#define hs_bool_user(k, v)				\
   { .key_type=HS_BOOL, .key.boolean=k,			\
	 .value_type=HS_USER, .value.stack_index=v }
#define hs_bool_light(k, v)				\
   { .key_type=HS_BOOL, .key.boolean=k,			\
	 .value_type=HS_LIGHT, .value.userdata=v }

#define hs_int_bool(k, v)				\
   { .key_type=HS_INT, .key.integer=k,			\
	 .value_type=HS_BOOL, .value.boolean=v }
#define hs_int_int(k, v)			\
   { .key_type=HS_INT, .key.integer=k,		\
	 .value_type=HS_INT, .value.integer=v }
#define hs_int_num(k, v)			\
   { .key_type=HS_INT, .key.integer=k,		\
	 .value_type=HS_NUM, .value.number=v }
#define hs_int_str(k, v)			\
   { .key_type=HS_INT, .key.integer=k,		\
	 HS_STR, .value.string=v }
#define hs_int_tbl(k, v)			\
   { .key_type=HS_INT, .key.integer=k,		\
	 HS_TBL, .value.stack_index=v }
#define hs_int_func(k, v)			\
   { .key_type=HS_INT, .key.integer=k,		\
	 HS_FUNC, .value.stack_index=v }
#define hs_int_cfunc(k, v)			\
   { .key_type=HS_INT, .key.integer=k,		\
	 HS_CFUNC, .value.function=v }
#define hs_int_user(k, v)			\
   { .key_type=HS_INT, .key.integer=k,		\
	 HS_USER, .value.stack_index=v }
#define hs_int_light(k, v)			\
   { .key_type=HS_INT, .key.integer=k,		\
	 HS_LIGHT, .value.userdata=v }
   
#define hs_num_bool(k, v)			\
   { .key_type=HS_NUM, .key.number=k,		\
	 HS_BOOL, .value.boolean=v }
#define hs_num_int(k, v)			\
   { .key_type=HS_NUM, .key.number=k,		\
	 HS_INT, .value.integer=v }
#define hs_num_num(k, v)			\
   { .key_type=HS_NUM, .key.number=k,		\
	 HS_NUM, .value.number=v }
#define hs_num_str(k, v)			\
   { .key_type=HS_NUM, .key.number=k,		\
	 HS_STR, .value.string=v }
#define hs_num_tbl(k, v)			\
   { .key_type=HS_NUM, .key.number=k,		\
	 HS_TBL, .value.stack_index=v }
#define hs_num_func(k, v)			\
   { .key_type=HS_NUM, .key.number=k,		\
	 HS_FUNC, .value.stack_index=v }
#define hs_num_cfunc(k, v)			\
   { .key_type=HS_NUM, .key.number=k,		\
	 HS_CFUNC, .value.function=v }
#define hs_num_user(k, v)			\
   { .key_type=HS_NUM, .key.number=k,		\
	 HS_USER, .value.stack_index=v }
#define hs_num_light(k, v)			\
   { .key_type=HS_NUM, .key.number=k,		\
	 HS_LIGHT, .value.userdata=v }

#define hs_tbl_bool(k, v)			\
   { .key_type=HS_TBL, .key.stack_index=k,	\
	 HS_BOOL, .value.boolean=v }
#define hs_tbl_int(k, v)			\
   { .key_type=HS_TBL, .key.stack_index=k,	\
	 HS_INT, .value.integer=v }
#define hs_tbl_num(k, v)			\
   { .key_type=HS_TBL, .key.stack_index=k,	\
	 HS_NUM, .value.number=v }
#define hs_tbl_str(k, v)			\
   { .key_type=HS_TBL, .key.stack_index=k,	\
	 HS_STR, .value.string=v }
#define hs_tbl_tbl(k, v)			\
   { .key_type=HS_TBL, .key.stack_index=k,	\
	 HS_TBL, .value.stack_index=v }
#define hs_tbl_func(k, v)			\
   { .key_type=HS_TBL, .key.stack_index=k,	\
	 HS_FUNC, .value.stack_index=v }
#define hs_tbl_cfunc(k, v)			\
   { .key_type=HS_TBL, .key.stack_index=k,	\
	 HS_CFUNC, .value.function=v }
#define hs_tbl_user(k, v)			\
   { .key_type=HS_TBL, .key.stack_index=k,	\
	 HS_USER, .value.stack_index=v }
#define hs_tbl_light(k, v)			\
   { .key_type=HS_TBL, .key.stack_index=k,	\
	 HS_LIGHT, .value.userdata=v }

#define hs_func_bool(k, v)			\
   { .key_type=HS_FUNC, .key.stack_index=k,	\
	 HS_BOOL, .value.boolean=v }
#define hs_func_int(k, v)			\
   { .key_type=HS_FUNC, .key.stack_index=k,	\
	 HS_INT, .value.integer=v }
#define hs_func_num(k, v)			\
   { .key_type=HS_FUNC, .key.stack_index=k,	\
	 HS_NUM, .value.number=v }
#define hs_func_str(k, v)			\
   { .key_type=HS_FUNC, .key.stack_index=k,	\
	 HS_STR, .value.string=v }
#define hs_func_tbl(k, v)			\
   { .key_type=HS_FUNC, .key.stack_index=k,	\
	 HS_TBL, .value.stack_index=v }
#define hs_func_func(k, v)			\
   { .key_type=HS_FUNC, .key.stack_index=k,	\
	 HS_FUNC, .value.stack_index=v }
#define hs_func_cfunc(k, v)			\
   { .key_type=HS_FUNC, .key.stack_index=k,	\
	 HS_CFUNC, .value.function=v }
#define hs_func_user(k, v)			\
   { .key_type=HS_FUNC, .key.stack_index=k,	\
	 HS_USER, .value.stack_index=v }
#define hs_func_light(k, v)			\
   { .key_type=HS_FUNC, .key.stack_index=k,	\
	 HS_LIGHT, .value.userdata=v }

#define hs_cfunc_bool(k, v)			\
   { .key_type=HS_CFUNC, .key.function=k,	\
	 HS_BOOL, .value.boolean=v }
#define hs_cfunc_int(k, v)			\
   { .key_type=HS_CFUNC, .key.function=k,	\
	 HS_INT, .value.integer=v }
#define hs_cfunc_num(k, v)			\
   { .key_type=HS_CFUNC, .key.function=k,	\
	 HS_NUM, .value.number=v }
#define hs_cfunc_str(k, v)			\
   { .key_type=HS_CFUNC, .key.function=k,	\
	 HS_STR, .value.string=v }
#define hs_cfunc_tbl(k, v)			\
   { .key_type=HS_CFUNC, .key.function=k,	\
	 HS_TBL, .value.stack_index=v }
#define hs_cfunc_func(k, v)			\
   { .key_type=HS_CFUNC, .key.function=k,	\
	 HS_FUNC, .value.stack_index=v }
#define hs_cfunc_cfunc(k, v)			\
   { .key_type=HS_CFUNC, .key.function=k,	\
	 HS_CFUNC, .value.function=v }
#define hs_cfunc_user(k, v)			\
   { .key_type=HS_CFUNC, .key.function=k,	\
	 HS_USER, .value.stack_index=v }
#define hs_cfunc_light(k, v)			\
   { .key_type=HS_CFUNC, .key.function=k,	\
	 HS_LIGHT, .value.userdata=v }
   
#define hs_user_bool(k, v)			\
   { .key_type=HS_USER, .key.stack_index=k,	\
	 HS_BOOL, .value.boolean=v }
#define hs_user_int(k, v)			\
   { .key_type=HS_USER, .key.stack_index=k,	\
	 HS_INT, .value.integer=v }
#define hs_user_num(k, v)			\
   { .key_type=HS_USER, .key.stack_index=k,	\
	 HS_NUM, .value.number=v }
#define hs_user_str(k, v)			\
   { .key_type=HS_USER, .key.stack_index=k,	\
	 HS_STR, .value.string=v }
#define hs_user_tbl(k, v)			\
   { .key_type=HS_USER, .key.stack_index=k,	\
	 HS_TBL, .value.stack_index=v }
#define hs_user_func(k, v)			\
   { .key_type=HS_USER, .key.stack_index=k,	\
	 HS_FUNC, .value.stack_index=v }
#define hs_user_cfunc(k, v)			\
   { .key_type=HS_USER, .key.stack_index=k,	\
	 HS_CFUNC, .value.function=v }
#define hs_user_user(k, v)			\
   { .key_type=HS_USER, .key.stack_index=k,	\
	 HS_USER, .value.stack_index=v }
#define hs_user_light(k, v)			\
   { .key_type=HS_USER, .key.stack_index=k,	\
	 HS_LIGHT, .value.userdata=v }

#define hs_light_bool(k, v)			\
   { .key_type=HS_LIGHT, .key.userdata=k,	\
	 HS_BOOL, .value.boolean=v }
#define hs_light_int(k, v)			\
   { .key_type=HS_LIGHT, .key.userdata=k,	\
	 HS_INT, .value.integer=v }
#define hs_light_num(k, v)			\
   { .key_type=HS_LIGHT, .key.userdata=k,	\
	 HS_NUM, .value.number=v }
#define hs_light_str(k, v)			\
   { .key_type=HS_LIGHT, .key.userdata=k,	\
	 HS_STR, .value.string=v }
#define hs_light_tbl(k, v)			\
   { .key_type=HS_LIGHT, .key.userdata=k,	\
	 HS_TBL, .value.stack_index=v }
#define hs_light_func(k, v)			\
   { .key_type=HS_LIGHT, .key.userdata=k,	\
	 HS_FUNC, .value.stack_index=v }
#define hs_light_cfunc(k, v)			\
   { .key_type=HS_LIGHT, .key.userdata=k,	\
	 HS_CFUNC, .value.function=v }
#define hs_light_user(k, v)			\
   { .key_type=HS_LIGHT, .key.userdata=k,	\
	 HS_USER, .value.stack_index=v }
#define hs_light_light(k, v)			\
   { .key_type=HS_LIGHT, .key.userdata=k,	\
	 HS_LIGHT, .value.userdata=v }
   
int hs_create_table_(lua_State *L, int n_elements, struct hs_tbl_entry *elements);

#define hs_create_table(L, ...)					\
   hs_create_table_(L,						\
		    VA_NARGS(__VA_ARGS__)/4,			\
		    (struct hs_tbl_entry[]) { __VA_ARGS__ })


/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * hs_process_table
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

void hs_process_table(lua_State *L, int table_index, void *data, ...);
// default processors
void hs_pt_set_boolean(bool value, void *data);
void hs_pt_set_integer(lua_Integer value, void *data);
void hs_pt_set_number(lua_Number value, void *data);
void hs_pt_set_string(const char *value, void *data);


/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * hs_pushstring
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

void hs_vpushstring(lua_State *L, const char *format_string, va_list args);
void hs_pushstring(lua_State *L, const char *format_string, ...);


/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * error creation and handling
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

void hs_throw_error(lua_State *L, const char *format_string, ...);
int hs_traceback(lua_State *L);
int hs_call(lua_State *L, int nargs, int nret);


/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * registry operations
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#define hs_rstore(L) luaL_ref(L, LUA_REGISTRYINDEX);
#define hs_rload(L, ref) lua_rawgeti(L, LUA_REGISTRYINDEX, ref)
#define hs_rdel(L, ref) luaL_unref(L, LUA_REGISTRYINDEX, ref)

#endif