#ifndef _ECORE_GETOPT_H
#define _ECORE_GETOPT_H

#include <stdio.h>
#include <Eina.h>

#ifdef EAPI
# undef EAPI
#endif

#ifdef _WIN32
# ifdef EFL_ECORE_BUILD
#  ifdef DLL_EXPORT
#   define EAPI __declspec(dllexport)
#  else
#   define EAPI
#  endif /* ! DLL_EXPORT */
# else
#  define EAPI __declspec(dllimport)
# endif /* ! EFL_ECORE_BUILD */
#else
# ifdef __GNUC__
#  if __GNUC__ >= 4
#   define EAPI __attribute__ ((visibility("default")))
#  else
#   define EAPI
#  endif
# else
#  define EAPI
# endif
#endif /* ! _WIN32 */

/**
 * @file Ecore_Getopt.h
 * @brief Contains powerful getopt replacement.
 *
 * This replacement handles both short (-X) or long options (--ABC)
 * options, with various actions supported, like storing one value and
 * already converting to required type, counting number of
 * occurrences, setting true or false values, show help, license,
 * copyright and even support user-defined callbacks.
 *
 * It is provided a set of C Pre Processor macros so definition is
 * straightforward.
 *
 * Values will be stored elsewhere indicated by an array of pointers
 * to values, it is given in separate to parser description so you can
 * use multiple values with the same parser.
 */


#ifdef __cplusplus
extern "C" {
#endif

  typedef enum {
    ECORE_GETOPT_ACTION_STORE,
    ECORE_GETOPT_ACTION_STORE_CONST,
    ECORE_GETOPT_ACTION_STORE_TRUE,
    ECORE_GETOPT_ACTION_STORE_FALSE,
    ECORE_GETOPT_ACTION_CHOICE,
    ECORE_GETOPT_ACTION_APPEND,
    ECORE_GETOPT_ACTION_COUNT,
    ECORE_GETOPT_ACTION_CALLBACK,
    ECORE_GETOPT_ACTION_HELP,
    ECORE_GETOPT_ACTION_VERSION,
    ECORE_GETOPT_ACTION_COPYRIGHT,
    ECORE_GETOPT_ACTION_LICENSE
  } Ecore_Getopt_Action;

  typedef enum {
    ECORE_GETOPT_TYPE_STR,
    ECORE_GETOPT_TYPE_BOOL,
    ECORE_GETOPT_TYPE_SHORT,
    ECORE_GETOPT_TYPE_INT,
    ECORE_GETOPT_TYPE_LONG,
    ECORE_GETOPT_TYPE_USHORT,
    ECORE_GETOPT_TYPE_UINT,
    ECORE_GETOPT_TYPE_ULONG,
    ECORE_GETOPT_TYPE_DOUBLE
  } Ecore_Getopt_Type;

  typedef enum {
    ECORE_GETOPT_DESC_ARG_REQUIREMENT_NO = 0,
    ECORE_GETOPT_DESC_ARG_REQUIREMENT_YES = 1,
    ECORE_GETOPT_DESC_ARG_REQUIREMENT_OPTIONAL = 3
  } Ecore_Getopt_Desc_Arg_Requirement;

  typedef union _Ecore_Getopt_Value             Ecore_Getopt_Value;

  typedef struct _Ecore_Getopt_Desc_Store       Ecore_Getopt_Desc_Store;
  typedef struct _Ecore_Getopt_Desc_Callback    Ecore_Getopt_Desc_Callback;
  typedef struct _Ecore_Getopt_Desc             Ecore_Getopt_Desc;
  typedef struct _Ecore_Getopt                  Ecore_Getopt;

  union _Ecore_Getopt_Value
  {
     char **strp;
     unsigned char *boolp;
     short *shortp;
     int *intp;
     long *longp;
     unsigned short *ushortp;
     unsigned int *uintp;
     unsigned long *ulongp;
     double *doublep;
     Eina_List **listp;
     void **ptrp;
  };

  struct _Ecore_Getopt_Desc_Store
  {
     Ecore_Getopt_Type type;           /**< type of data being handled */
     Ecore_Getopt_Desc_Arg_Requirement arg_req;
     union
     {
        const char *strv;
        Eina_Bool boolv;
        short shortv;
        int intv;
        long longv;
        unsigned short ushortv;
        unsigned int uintv;
        unsigned long ulongv;
        double doublev;
     } def;
  };

  struct _Ecore_Getopt_Desc_Callback
  {
     Eina_Bool (*func)(const Ecore_Getopt *parser, const Ecore_Getopt_Desc *desc, const char *str, void *data, Ecore_Getopt_Value *storage);
     const void *data;
     Ecore_Getopt_Desc_Arg_Requirement arg_req;
     const char *def;
  };

  struct _Ecore_Getopt_Desc
  {
     char shortname;       /**< used with a single dash */
     const char *longname; /**< used with double dashes */
     const char *help;     /**< used by --help/ecore_getopt_help() */
     const char *metavar;  /**< used by ecore_getopt_help() with nargs > 0 */

     Ecore_Getopt_Action action; /**< define how to handle it */
     union
     {
        const Ecore_Getopt_Desc_Store store;
        const void *store_const;
        const char *const *choices; /* NULL terminated. */
        const Ecore_Getopt_Type append_type;
        const Ecore_Getopt_Desc_Callback callback;
        const void *dummy;
     } action_param;
  };

  struct _Ecore_Getopt
  {
     const char *prog; /**< to be used when ecore_app_args_get() fails */
     const char *usage; /**< usage example, %prog is replaced */
     const char *version; /**< if exists, --version will work */
     const char *copyright; /**< if exists, --copyright will work */
     const char *license; /**< if exists, --license will work */
     const char *description; /**< long description, possible multiline */
     Eina_Bool strict : 1; /**< fail on errors */
     const Ecore_Getopt_Desc descs[]; /* NULL terminated. */
  };

#define ECORE_GETOPT_STORE_FULL(shortname, longname, help, metavar, type, arg_requirement, default_value) \
  {shortname, longname, help, metavar, ECORE_GETOPT_ACTION_STORE,        \
       {.store = {type, arg_requirement, default_value}}}

#define ECORE_GETOPT_STORE(shortname, longname, help, type)             \
  ECORE_GETOPT_STORE_FULL(shortname, longname, help, NULL, type,        \
                          ECORE_GETOPT_DESC_ARG_REQUIREMENT_YES, {})

#define ECORE_GETOPT_STORE_STR(shortname, longname, help)               \
  ECORE_GETOPT_STORE(shortname, longname, help, ECORE_GETOPT_TYPE_STR)
#define ECORE_GETOPT_STORE_BOOL(shortname, longname, help)              \
  ECORE_GETOPT_STORE(shortname, longname, help, ECORE_GETOPT_TYPE_BOOL)
#define ECORE_GETOPT_STORE_SHORT(shortname, longname, help)             \
  ECORE_GETOPT_STORE(shortname, longname, help, ECORE_GETOPT_TYPE_SHORT)
#define ECORE_GETOPT_STORE_INT(shortname, longname, help)               \
  ECORE_GETOPT_STORE(shortname, longname, help, ECORE_GETOPT_TYPE_INT)
#define ECORE_GETOPT_STORE_LONG(shortname, longname, help)              \
  ECORE_GETOPT_STORE(shortname, longname, help, ECORE_GETOPT_TYPE_LONG)
#define ECORE_GETOPT_STORE_USHORT(shortname, longname, help)            \
  ECORE_GETOPT_STORE(shortname, longname, help, ECORE_GETOPT_TYPE_USHORT)
#define ECORE_GETOPT_STORE_UINT(shortname, longname, help)              \
  ECORE_GETOPT_STORE(shortname, longname, help, ECORE_GETOPT_TYPE_UINT)
#define ECORE_GETOPT_STORE_ULONG(shortname, longname, help)             \
  ECORE_GETOPT_STORE(shortname, longname, help, ECORE_GETOPT_TYPE_ULONG)
#define ECORE_GETOPT_STORE_DOUBLE(shortname, longname, help)            \
  ECORE_GETOPT_STORE(shortname, longname, help, ECORE_GETOPT_TYPE_DOUBLE)


#define ECORE_GETOPT_STORE_METAVAR(shortname, longname, help, metavar, type) \
  ECORE_GETOPT_STORE_FULL(shortname, longname, help, metavar, type,        \
                          ECORE_GETOPT_DESC_ARG_REQUIREMENT_YES, {})

#define ECORE_GETOPT_STORE_METAVAR_STR(shortname, longname, help, metavar) \
  ECORE_GETOPT_STORE_METAVAR(shortname, longname, help, metavar, ECORE_GETOPT_TYPE_STR)
#define ECORE_GETOPT_STORE_METAVAR_BOOL(shortname, longname, help, metavar) \
  ECORE_GETOPT_STORE_METAVAR(shortname, longname, help, metavar, ECORE_GETOPT_TYPE_BOOL)
#define ECORE_GETOPT_STORE_METAVAR_SHORT(shortname, longname, help, metavar) \
  ECORE_GETOPT_STORE_METAVAR(shortname, longname, help, metavar, ECORE_GETOPT_TYPE_SHORT)
#define ECORE_GETOPT_STORE_METAVAR_INT(shortname, longname, help, metavar) \
  ECORE_GETOPT_STORE_METAVAR(shortname, longname, help, metavar, ECORE_GETOPT_TYPE_INT)
#define ECORE_GETOPT_STORE_METAVAR_LONG(shortname, longname, help, metavar) \
  ECORE_GETOPT_STORE_METAVAR(shortname, longname, help, metavar, ECORE_GETOPT_TYPE_LONG)
#define ECORE_GETOPT_STORE_METAVAR_USHORT(shortname, longname, help, metavar) \
  ECORE_GETOPT_STORE_METAVAR(shortname, longname, help, metavar, ECORE_GETOPT_TYPE_USHORT)
#define ECORE_GETOPT_STORE_METAVAR_UINT(shortname, longname, help, metavar) \
  ECORE_GETOPT_STORE_METAVAR(shortname, longname, help, metavar, ECORE_GETOPT_TYPE_UINT)
#define ECORE_GETOPT_STORE_METAVAR_ULONG(shortname, longname, help, metavar) \
  ECORE_GETOPT_STORE_METAVAR(shortname, longname, help, metavar, ECORE_GETOPT_TYPE_ULONG)
#define ECORE_GETOPT_STORE_METAVAR_DOUBLE(shortname, longname, help, metavar) \
  ECORE_GETOPT_STORE_METAVAR(shortname, longname, help, metavar, ECORE_GETOPT_TYPE_DOUBLE)


#define ECORE_GETOPT_STORE_DEF(shortname, longname, help, type, default_value) \
  ECORE_GETOPT_STORE_FULL(shortname, longname, help, NULL, type,               \
                          ECORE_GETOPT_DESC_ARG_REQUIREMENT_OPTIONAL,          \
                          default_value)

#define ECORE_GETOPT_STORE_DEF_STR(shortname, longname, help, default_value) \
  ECORE_GETOPT_STORE_DEF(shortname, longname, help,                          \
                         ECORE_GETOPT_TYPE_STR,                              \
                         {.strv = default_value})
#define ECORE_GETOPT_STORE_DEF_BOOL(shortname, longname, help, default_value) \
  ECORE_GETOPT_STORE_DEF(shortname, longname, help,                           \
                         ECORE_GETOPT_TYPE_BOOL,                              \
                         {.boolv = default_value})
#define ECORE_GETOPT_STORE_DEF_SHORT(shortname, longname, help, default_value) \
  ECORE_GETOPT_STORE_DEF(shortname, longname, help,                            \
                         ECORE_GETOPT_TYPE_SHORT,                              \
                         {.shortv = default_value})
#define ECORE_GETOPT_STORE_DEF_INT(shortname, longname, help, default_value) \
  ECORE_GETOPT_STORE_DEF(shortname, longname, help,                          \
                         ECORE_GETOPT_TYPE_INT,                              \
                         {.intv = default_value})
#define ECORE_GETOPT_STORE_DEF_LONG(shortname, longname, help, default_value) \
  ECORE_GETOPT_STORE_DEF(shortname, longname, help,                           \
                         ECORE_GETOPT_TYPE_LONG,                              \
                         {.longv = default_value})
#define ECORE_GETOPT_STORE_DEF_USHORT(shortname, longname, help, default_value) \
  ECORE_GETOPT_STORE_DEF(shortname, longname, help,                             \
                         ECORE_GETOPT_TYPE_USHORT,                              \
                         {.ushortv = default_value})
#define ECORE_GETOPT_STORE_DEF_UINT(shortname, longname, help, default_value) \
  ECORE_GETOPT_STORE_DEF(shortname, longname, help,                           \
                         ECORE_GETOPT_TYPE_UINT,                              \
                         {.uintv = default_value})
#define ECORE_GETOPT_STORE_DEF_ULONG(shortname, longname, help, default_value) \
  ECORE_GETOPT_STORE_DEF(shortname, longname, help,                            \
                         ECORE_GETOPT_TYPE_ULONG,                              \
                         {.ulongv = default_value})
#define ECORE_GETOPT_STORE_DEF_DOUBLE(shortname, longname, help, default_value) \
  ECORE_GETOPT_STORE_DEF(shortname, longname, help,                             \
                         ECORE_GETOPT_TYPE_DOUBLE,                              \
                         {.doublev = default_value})

#define ECORE_GETOPT_STORE_FULL_STR(shortname, longname, help, metavar, arg_requirement, default_value) \
  ECORE_GETOPT_STORE_FULL(shortname, longname, help, metavar,                                           \
                          ECORE_GETOPT_TYPE_STR,                                                        \
                          arg_requirement,                                                               \
                          {.strv = default_value})
#define ECORE_GETOPT_STORE_FULL_BOOL(shortname, longname, help, metavar, arg_requirement, default_value) \
  ECORE_GETOPT_STORE_FULL(shortname, longname, help, metavar,                                            \
                          ECORE_GETOPT_TYPE_BOOL,                                                        \
                          arg_requirement,                                                               \
                          {.boolv = default_value})
#define ECORE_GETOPT_STORE_FULL_SHORT(shortname, longname, help, metavar, arg_requirement, default_value) \
  ECORE_GETOPT_STORE_FULL(shortname, longname, help, metavar,                                             \
                          ECORE_GETOPT_TYPE_SHORT,                                                        \
                          arg_requirement,                                                                \
                          {.shortv = default_value})
#define ECORE_GETOPT_STORE_FULL_INT(shortname, longname, help, metavar, arg_requirement, default_value) \
  ECORE_GETOPT_STORE_FULL(shortname, longname, help, metavar,                                           \
                          ECORE_GETOPT_TYPE_INT,                                                        \
                          arg_requirement,                                                              \
                          {.intv = default_value})
#define ECORE_GETOPT_STORE_FULL_LONG(shortname, longname, help, metavar, arg_requirement, default_value) \
  ECORE_GETOPT_STORE_FULL(shortname, longname, help, metavar,                                            \
                          ECORE_GETOPT_TYPE_LONG,                                                        \
                          arg_requirement,                                                               \
                          {.longv = default_value})
#define ECORE_GETOPT_STORE_FULL_USHORT(shortname, longname, help, metavar, arg_requirement, default_value) \
  ECORE_GETOPT_STORE_FULL(shortname, longname, help, metavar,                                              \
                          ECORE_GETOPT_TYPE_USHORT,                                                        \
                          arg_requirement,                                                                 \
                          {.ushortv = default_value})
#define ECORE_GETOPT_STORE_FULL_UINT(shortname, longname, help, metavar, arg_requirement, default_value) \
  ECORE_GETOPT_STORE_FULL(shortname, longname, help, metavar,                                            \
                          ECORE_GETOPT_TYPE_UINT,                                                        \
                          arg_requirement,                                                               \
                          {.uintv = default_value})
#define ECORE_GETOPT_STORE_FULL_ULONG(shortname, longname, help, metavar, arg_requirement, default_value) \
  ECORE_GETOPT_STORE_FULL(shortname, longname, help, metavar,                                             \
                          ECORE_GETOPT_TYPE_ULONG,                                                        \
                          arg_requirement,                                                                \
                          {.ulongv = default_value})
#define ECORE_GETOPT_STORE_FULL_DOUBLE(shortname, longname, help, metavar, arg_requirement, default_value) \
  ECORE_GETOPT_STORE_FULL(shortname, longname, help, metavar,                                              \
                          ECORE_GETOPT_TYPE_DOUBLE,                                                        \
                          arg_requirement,                                                                 \
                          {.doublev = default_value})

#define ECORE_GETOPT_STORE_CONST(shortname, longname, help, value)   \
  {shortname, longname, help, NULL, ECORE_GETOPT_ACTION_STORE_CONST, \
       {.store_const = value}}
#define ECORE_GETOPT_STORE_TRUE(shortname, longname, help)          \
  {shortname, longname, help, NULL, ECORE_GETOPT_ACTION_STORE_TRUE, \
       {.dummy = NULL}}
#define ECORE_GETOPT_STORE_FALSE(shortname, longname, help)          \
  {shortname, longname, help, NULL, ECORE_GETOPT_ACTION_STORE_FALSE, \
       {.dummy = NULL}}

#define ECORE_GETOPT_CHOICE(shortname, longname, help, choices_array) \
  {shortname, longname, help, NULL, ECORE_GETOPT_ACTION_CHOICE,       \
       {.choices = choices_array}}
#define ECORE_GETOPT_CHOICE_METAVAR(shortname, longname, help, metavar, choices_array) \
  {shortname, longname, help, metavar, ECORE_GETOPT_ACTION_CHOICE,                     \
       {.choices = choices_array}}


#define ECORE_GETOPT_APPEND(shortname, longname, help, sub_type) \
  {shortname, longname, help, NULL, ECORE_GETOPT_ACTION_APPEND,  \
       {.append_type = sub_type}}
#define ECORE_GETOPT_APPEND_METAVAR(shortname, longname, help, metavar, type) \
  {shortname, longname, help, metavar, ECORE_GETOPT_ACTION_APPEND,            \
       {.append_type = type}}

#define ECORE_GETOPT_COUNT(shortname, longname, help)          \
  {shortname, longname, help, NULL, ECORE_GETOPT_ACTION_COUNT, \
       {.dummy = NULL}}

#define ECORE_GETOPT_CALLBACK_FULL(shortname, longname, help, metavar, callback_func, callback_data, argument_requirement, default_value) \
  {shortname, longname, help, metavar, ECORE_GETOPT_ACTION_CALLBACK,                                                                      \
       {.callback = {callback_func, callback_data,                                                                                        \
                     argument_requirement, default_value}}}
#define ECORE_GETOPT_CALLBACK_NOARGS(shortname, longname, help, callback_func, callback_data) \
  ECORE_GETOPT_CALLBACK_FULL(shortname, longname, help, NULL,                                 \
                             callback_func, callback_data,                                    \
                             ECORE_GETOPT_DESC_ARG_REQUIREMENT_NO,                            \
                             NULL)
#define ECORE_GETOPT_CALLBACK_ARGS(shortname, longname, help, metavar, callback_func, callback_data) \
  ECORE_GETOPT_CALLBACK_FULL(shortname, longname, help, metavar,                                     \
                             callback_func, callback_data,                                           \
                             ECORE_GETOPT_DESC_ARG_REQUIREMENT_YES,                                  \
                             NULL)

#define ECORE_GETOPT_HELP(shortname, longname)      \
  {shortname, longname, "show this message.", NULL, \
       ECORE_GETOPT_ACTION_HELP,                    \
       {.dummy = NULL}}

#define ECORE_GETOPT_VERSION(shortname, longname)      \
  {shortname, longname, "show program version.", NULL, \
       ECORE_GETOPT_ACTION_VERSION,                    \
       {.dummy = NULL}}

#define ECORE_GETOPT_COPYRIGHT(shortname, longname) \
  {shortname, longname, "show copyright.", NULL,    \
       ECORE_GETOPT_ACTION_COPYRIGHT,               \
       {.dummy = NULL}}

#define ECORE_GETOPT_LICENSE(shortname, longname) \
  {shortname, longname, "show license.", NULL,    \
       ECORE_GETOPT_ACTION_LICENSE,               \
       {.dummy = NULL}}

#define ECORE_GETOPT_SENTINEL {0, NULL, NULL, NULL, 0, {.dummy = NULL}}

#define ECORE_GETOPT_VALUE_STR(val)      {.strp = &(val)}
#define ECORE_GETOPT_VALUE_BOOL(val)     {.boolp = &(val)}
#define ECORE_GETOPT_VALUE_SHORT(val)    {.shortp = &(val)}
#define ECORE_GETOPT_VALUE_INT(val)      {.intp = &(val)}
#define ECORE_GETOPT_VALUE_LONG(val)     {.longp = &(val)}
#define ECORE_GETOPT_VALUE_USHORT(val)   {.ushortp = &(val)}
#define ECORE_GETOPT_VALUE_UINT(val)     {.uintp = &(val)}
#define ECORE_GETOPT_VALUE_ULONG(val)    {.ulongp = &(val)}
#define ECORE_GETOPT_VALUE_DOUBLE(val)   {.doublep = &(val)}
#define ECORE_GETOPT_VALUE_PTR(val)      {.ptrp = &(val)}
#define ECORE_GETOPT_VALUE_PTR_CAST(val) {.ptrp = (void **)&(val)}
#define ECORE_GETOPT_VALUE_LIST(val)     {.listp = &(val)}
#define ECORE_GETOPT_VALUE_NONE          {.ptrp = NULL}

  EAPI void ecore_getopt_help(FILE *fp, const Ecore_Getopt *info);

  EAPI Eina_Bool ecore_getopt_parser_has_duplicates(const Ecore_Getopt *parser);
  EAPI int ecore_getopt_parse(const Ecore_Getopt *parser, Ecore_Getopt_Value *values, int argc, char **argv);

  EAPI Eina_List *ecore_getopt_list_free(Eina_List *list);

  /* helper functions to be used with ECORE_GETOPT_CALLBACK_*() */
  EAPI Eina_Bool ecore_getopt_callback_geometry_parse(const Ecore_Getopt *parser, const Ecore_Getopt_Desc *desc, const char *str, void *data, Ecore_Getopt_Value *storage);
  EAPI Eina_Bool ecore_getopt_callback_size_parse(const Ecore_Getopt *parser, const Ecore_Getopt_Desc *desc, const char *str, void *data, Ecore_Getopt_Value *storage);


#ifdef __cplusplus
}
#endif
#endif /* _ECORE_GETOPT_H */
