#ifndef HELP_H
#define HELP_H

#include "string-list.h"
#include "strbuf.h"

struct cmdnames {
	int alloc;
	int cnt;
	struct cmdname {
		size_t len; /* also used for similarity index in help.c */
		char name[FLEX_ARRAY];
	} **names;
};

void cmdnames_release(struct cmdnames *cmds);

static inline void mput_char(char c, unsigned int num)
{
	while (num--)
		putchar(c);
}

void list_common_cmds_help(void);
void list_all_cmds_help(int show_external_commands, int show_aliases);
void list_guides_help(void);
void list_user_interfaces_help(void);
void list_developer_interfaces_help(void);

void list_all_main_cmds(struct string_list *list);
void list_all_other_cmds(struct string_list *list);
void list_cmds_by_category(struct string_list *list,
			   const char *category);
void list_cmds_by_config(struct string_list *list);
char *help_unknown_cmd(const char *cmd);
void load_command_list(const char *prefix,
		       struct cmdnames *main_cmds,
		       struct cmdnames *other_cmds);
void load_builtin_commands(const char *prefix, struct cmdnames *cmds);
void add_cmdname(struct cmdnames *cmds, const char *name, int len);
/* Here we require that excludes is a sorted list. */
void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes);
int is_in_cmdlist(struct cmdnames *cmds, const char *name);
void list_commands(struct cmdnames *main_cmds, struct cmdnames *other_cmds);
void get_version_info(struct strbuf *buf, int show_build_options);

/*
 * call this to die(), when it is suspected that the user mistyped a
 * ref to the command, to give suggested "correct" refs.
 */
NORETURN void help_unknown_ref(const char *ref, const char *cmd, const char *error);

static inline void list_config_item(struct string_list *list,
				    const char *prefix,
				    const char *str)
{
	string_list_append_nodup(list, xstrfmt("%s.%s", prefix, str));
}

#define define_list_config_array(array)					\
void list_config_##array(struct string_list *list, const char *prefix)	\
{									\
	for (size_t i = 0; i < ARRAY_SIZE(array); i++)			\
		if (array[i])						\
			list_config_item(list, prefix, array[i]);	\
}									\
struct string_list

#define define_list_config_array_extra(array, values)			\
void list_config_##array(struct string_list *list, const char *prefix)	\
{									\
	static const char *extra[] = values;				\
	for (size_t i = 0; i < ARRAY_SIZE(extra); i++)			\
		list_config_item(list, prefix, extra[i]);		\
	for (size_t i = 0; i < ARRAY_SIZE(array); i++)			\
		if (array[i])						\
			list_config_item(list, prefix, array[i]);	\
}									\
struct string_list

/* These are actually scattered over many C files */
void list_config_advices(struct string_list *list, const char *prefix);
void list_config_color_branch_slots(struct string_list *list, const char *prefix);
void list_config_color_decorate_slots(struct string_list *list, const char *prefix);
void list_config_color_diff_slots(struct string_list *list, const char *prefix);
void list_config_color_grep_slots(struct string_list *list, const char *prefix);
void list_config_color_interactive_slots(struct string_list *list, const char *prefix);
void list_config_color_status_slots(struct string_list *list, const char *prefix);
void list_config_color_sideband_slots(struct string_list *list, const char *prefix);
void list_config_fsck_msg_ids(struct string_list *list, const char *prefix);

#endif /* HELP_H */