#ifndef SASS_C_FUNCTIONS_H

#define SASS_C_FUNCTIONS_H

#include <stddef.h>

#include <stdbool.h>

#include <sass/base.h>

#ifdef __cplusplus

extern "C" {

#endif

// Forward declaration

struct Sass_Env;

struct Sass_Callee;

struct Sass_Import;

struct Sass_Options;

struct Sass_Compiler;

struct Sass_Importer;

struct Sass_Function;

// Typedef helpers for callee lists

typedef struct Sass_Env (*Sass_Env_Frame);

// Typedef helpers for callee lists

typedef struct Sass_Callee (*Sass_Callee_Entry);

// Typedef helpers for import lists

typedef struct Sass_Import (*Sass_Import_Entry);

typedef struct Sass_Import* (*Sass_Import_List);

// Typedef helpers for custom importer lists

typedef struct Sass_Importer (*Sass_Importer_Entry);

typedef struct Sass_Importer* (*Sass_Importer_List);

// Typedef defining importer signature and return type

typedef Sass_Import_List (*Sass_Importer_Fn)

  (const char* url, Sass_Importer_Entry cb, struct Sass_Compiler* compiler);

// Typedef helpers for custom functions lists

typedef struct Sass_Function (*Sass_Function_Entry);

typedef struct Sass_Function* (*Sass_Function_List);

// Typedef defining function signature and return type

typedef union Sass_Value* (*Sass_Function_Fn)

  (const union Sass_Value*, Sass_Function_Entry cb, struct Sass_Compiler* compiler);

// Type of function calls

enum Sass_Callee_Type {

  SASS_CALLEE_MIXIN,

  SASS_CALLEE_FUNCTION,

  SASS_CALLEE_C_FUNCTION,

};

// Creator for sass custom importer return argument list

ADDAPI Sass_Importer_List ADDCALL sass_make_importer_list (size_t length);

ADDAPI Sass_Importer_Entry ADDCALL sass_importer_get_list_entry (Sass_Importer_List list, size_t idx);

ADDAPI void ADDCALL sass_importer_set_list_entry (Sass_Importer_List list, size_t idx, Sass_Importer_Entry entry);

ADDAPI void ADDCALL sass_delete_importer_list (Sass_Importer_List list);

// Creators for custom importer callback (with some additional pointer)

// The pointer is mostly used to store the callback into the actual binding

ADDAPI Sass_Importer_Entry ADDCALL sass_make_importer (Sass_Importer_Fn importer, double priority, void* cookie);

// Getters for import function descriptors

ADDAPI Sass_Importer_Fn ADDCALL sass_importer_get_function (Sass_Importer_Entry cb);

ADDAPI double ADDCALL sass_importer_get_priority (Sass_Importer_Entry cb);

ADDAPI void* ADDCALL sass_importer_get_cookie (Sass_Importer_Entry cb);

// Deallocator for associated memory

ADDAPI void ADDCALL sass_delete_importer (Sass_Importer_Entry cb);

// Creator for sass custom importer return argument list

ADDAPI Sass_Import_List ADDCALL sass_make_import_list (size_t length);

// Creator for a single import entry returned by the custom importer inside the list

ADDAPI Sass_Import_Entry ADDCALL sass_make_import_entry (const char* path, char* source, char* srcmap);

ADDAPI Sass_Import_Entry ADDCALL sass_make_import (const char* imp_path, const char* abs_base, char* source, char* srcmap);

// set error message to abort import and to print out a message (path from existing object is used in output)

ADDAPI Sass_Import_Entry ADDCALL sass_import_set_error(Sass_Import_Entry import, const char* message, size_t line, size_t col);

// Setters to insert an entry into the import list (you may also use [] access directly)

// Since we are dealing with pointers they should have a guaranteed and fixed size

ADDAPI void ADDCALL sass_import_set_list_entry (Sass_Import_List list, size_t idx, Sass_Import_Entry entry);

ADDAPI Sass_Import_Entry ADDCALL sass_import_get_list_entry (Sass_Import_List list, size_t idx);

// Getters for callee entry

ADDAPI const char* ADDCALL sass_callee_get_name (Sass_Callee_Entry);

ADDAPI const char* ADDCALL sass_callee_get_path (Sass_Callee_Entry);

ADDAPI size_t ADDCALL sass_callee_get_line (Sass_Callee_Entry);

ADDAPI size_t ADDCALL sass_callee_get_column (Sass_Callee_Entry);

ADDAPI enum Sass_Callee_Type ADDCALL sass_callee_get_type (Sass_Callee_Entry);

ADDAPI Sass_Env_Frame ADDCALL sass_callee_get_env (Sass_Callee_Entry);

// Getters and Setters for environments (lexical, local and global)

ADDAPI union Sass_Value* ADDCALL sass_env_get_lexical (Sass_Env_Frame, const char*);

ADDAPI void ADDCALL sass_env_set_lexical (Sass_Env_Frame, const char*, union Sass_Value*);

ADDAPI union Sass_Value* ADDCALL sass_env_get_local (Sass_Env_Frame, const char*);

ADDAPI void ADDCALL sass_env_set_local (Sass_Env_Frame, const char*, union Sass_Value*);

ADDAPI union Sass_Value* ADDCALL sass_env_get_global (Sass_Env_Frame, const char*);

ADDAPI void ADDCALL sass_env_set_global (Sass_Env_Frame, const char*, union Sass_Value*);

// Getters for import entry

ADDAPI const char* ADDCALL sass_import_get_imp_path (Sass_Import_Entry);

ADDAPI const char* ADDCALL sass_import_get_abs_path (Sass_Import_Entry);

ADDAPI const char* ADDCALL sass_import_get_source (Sass_Import_Entry);

ADDAPI const char* ADDCALL sass_import_get_srcmap (Sass_Import_Entry);

// Explicit functions to take ownership of these items

// The property on our struct will be reset to NULL

ADDAPI char* ADDCALL sass_import_take_source (Sass_Import_Entry);

ADDAPI char* ADDCALL sass_import_take_srcmap (Sass_Import_Entry);

// Getters from import error entry

ADDAPI size_t ADDCALL sass_import_get_error_line (Sass_Import_Entry);

ADDAPI size_t ADDCALL sass_import_get_error_column (Sass_Import_Entry);

ADDAPI const char* ADDCALL sass_import_get_error_message (Sass_Import_Entry);

// Deallocator for associated memory (incl. entries)

ADDAPI void ADDCALL sass_delete_import_list (Sass_Import_List);

// Just in case we have some stray import structs

ADDAPI void ADDCALL sass_delete_import (Sass_Import_Entry);

// Creators for sass function list and function descriptors

ADDAPI Sass_Function_List ADDCALL sass_make_function_list (size_t length);

ADDAPI Sass_Function_Entry ADDCALL sass_make_function (const char* signature, Sass_Function_Fn cb, void* cookie);

ADDAPI void ADDCALL sass_delete_function (Sass_Function_Entry entry);

ADDAPI void ADDCALL sass_delete_function_list (Sass_Function_List list);

// Setters and getters for callbacks on function lists

ADDAPI Sass_Function_Entry ADDCALL sass_function_get_list_entry(Sass_Function_List list, size_t pos);

ADDAPI void ADDCALL sass_function_set_list_entry(Sass_Function_List list, size_t pos, Sass_Function_Entry cb);

// Getters for custom function descriptors

ADDAPI const char* ADDCALL sass_function_get_signature (Sass_Function_Entry cb);

ADDAPI Sass_Function_Fn ADDCALL sass_function_get_function (Sass_Function_Entry cb);

ADDAPI void* ADDCALL sass_function_get_cookie (Sass_Function_Entry cb);

#ifdef __cplusplus

} // __cplusplus defined.

#endif

#endif