#ifndef RZ_CMD_H
#define RZ_CMD_H

#include <rz_types.h>
#include <rz_util.h>
#include <rz_bind.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef struct rz_core_t RzCore;

//RZ_LIB_VERSION_HEADER (rz_cmd);

#define MACRO_LIMIT 1024
#define MACRO_LABELS 20
#define RZ_CMD_MAXLEN 4096

/**
 * Value returned by a command handler.
 */
typedef enum rz_cmd_status_t {
	RZ_CMD_STATUS_OK = 0, ///< command handler exited in the right way
	RZ_CMD_STATUS_WRONG_ARGS, ///< command handler could not handle the arguments passed to it
	RZ_CMD_STATUS_ERROR, ///< command handler had issues while running (e.g. allocation error, etc.)
	RZ_CMD_STATUS_INVALID, ///< command could not be executed (e.g. shell level error, not existing command, bad expression, etc.)
	RZ_CMD_STATUS_EXIT, ///< command handler asks to exit the prompt loop
} RzCmdStatus;

/**
 * Type of argument a command handler can have. This is used for visualization
 * in help messages and for autocompletion as well.
 */
typedef enum rz_cmd_arg_type_t {
	RZ_CMD_ARG_TYPE_NUM, ///< Argument that can be interpreted by RzNum (numbers, flags, operations, etc.)
	RZ_CMD_ARG_TYPE_STRING, ///< Argument that can be an arbitrary string
	RZ_CMD_ARG_TYPE_ENV, ///< Argument can be the name of an existing rizin variable
	RZ_CMD_ARG_TYPE_ZIGN, ///< Argument can be the name of an existing zignature
	RZ_CMD_ARG_TYPE_CHOICES, ///< Argument can be one of the provided choices
	RZ_CMD_ARG_TYPE_ARRAY_STRING, ///< Argument is an array of arbitrary strings (if present, must be last in the list)
	RZ_CMD_ARG_TYPE_FCN, ///< Argument can be the name of an existing function
	RZ_CMD_ARG_TYPE_FILE, ///< Argument is a filename
	RZ_CMD_ARG_TYPE_OPTION, ///< Argument is an option, prefixed with `-`. It is present or not. No argument.
} RzCmdArgType;

typedef int (*RzCmdCb) (void *user, const char *input);
typedef RzCmdStatus (*RzCmdArgvCb) (RzCore *core, int argc, const char **argv);
typedef RzCmdStatus (*RzCmdArgvModesCb) (RzCore *core, int argc, const char **argv, RzOutputMode mode);
typedef int (*RzCmdNullCb) (void *user);

/**
 * argc/argv data created from parsing the input command string.
 */
typedef struct rz_cmd_parsed_args_t {
	int argc;
	char **argv;
	bool has_space_after_cmd;
} RzCmdParsedArgs;

typedef struct rz_cmd_macro_label_t {
	char name[80];
	char *ptr;
} RzCmdMacroLabel;

typedef struct rz_cmd_macro_item_t {
	char *name;
	char *args;
	char *code;
	int codelen;
	int nargs;
} RzCmdMacroItem;

typedef struct rz_cmd_macro_t {
	int counter;
	ut64 *brk_value;
	ut64 _brk_value;
	int brk;
// 	int (*cmd)(void *user, const char *cmd);
	RzCoreCmd cmd;
	PrintfCallback cb_printf;
	void *user;
	RNum *num;
	int labels_n;
	RzCmdMacroLabel labels[MACRO_LABELS];
	RzList *macros;
} RzCmdMacro;

typedef struct rz_cmd_item_t {
	char cmd[64];
	RzCmdCb callback;
} RzCmdItem;

typedef struct rz_cmd_alias_t {
	int count;
	char **keys;
	char **values;
	int *remote;
} RzCmdAlias;

/**
 * \brief A detailed entry that can be used to show additional info about a command entry.
 *
 * It can contain whatever relevant information (e.g. examples, specific uses of
 * a command, variables, etc.).
 *
 * Displayed as:
 * | <text><arg_str> # <comment>
 */
typedef struct rz_cmd_desc_detail_entry_t {
	/**
	 * Main text of the detailed entry
	 */
	const char *text;
	/**
	 * Short explanation of the entry, shown with the comment color
	 */
	const char *comment;
	/**
	 * Text to show in a different color, after `text`, usually used to show
	 * arguments for examples.
	 *
	 * Optional.
	 */
	const char *arg_str;
} RzCmdDescDetailEntry;

/**
 * A detail section used to better describe a command.
 */
typedef struct rz_cmd_desc_detail_t {
	/**
	 * Name of the section, displayed at the beginning of the section.
	 */
	const char *name;
	/**
	 * NULL-terminated array of entries, displayed one per line.
	 */
	const RzCmdDescDetailEntry *entries;
} RzCmdDescDetail;

/**
 * A description of an argument of a RzCmdDesc.
 */
typedef struct rz_cmd_desc_arg_t {
	/**
	 * The name of the argument, shown also in its help.
	 */
	const char *name;
	/**
	 * True if the argument is optional. If argument X is optional, then all
	 * arguments after X can only be specified if X was provided as well and
	 * they don't need to be set as optional.
	 *
	 * Example:
	 * CMDNAME <mandatory-arg0> [<optional-arg1> <optional-arg2> [<optional-arg3> [optional-arg4]]]
	 * <mandatory-arg0> has optional=false
	 * <optional-arg1> has optional=true
	 * <optional-arg2> has optional=false (it can be specified only if arg1
	 *                 was specified as well, so it doesn't need to be optional)
	 * <optional-arg3> has optional=true
	 * <optional-arg4> has optional=true
	 * Given the above:
	 * - `CMDNAME a0` is a valid command
	 * - `CMDNAME a0 a1 a2` is a valid command
	 * - `CMDNAME a0 a1` is not a valid command, because if a1 is specified, also a2 has to be
	 * - `CMDNAME a0 a1 a2 a3` is a valid command
	 * - `CMDNAME a0 a1 a2 a3 a4` is a valid command
	 */
	bool optional;
	/**
	 * Type of the argument.
	 */
	RzCmdArgType type;
	/**
	 * Default value for the argument, if it is not specified. This field
	 * shall be used only when /p optional is true.
	 */
	const char *default_value;
	/**
	 * Additional data which is type specific.
	 */
	union {
		/**
		 * List of possible values in case /p type is RZ_CMD_ARG_TYPE_CHOICES.
		 */
		const char **choices;
	};
} RzCmdDescArg;

/**
 * Define how the command looks like in the help.
 */
typedef struct rz_cmd_desc_help_t {
	/**
	 * Short-sentence explaining what the command does.
	 * This is shown, for example, when the list of sub-commands is printed
	 * and each sub-command has a very short description on the right,
	 * explaining what it does.
	 */
	const char *summary;
	/**
	 * Long description of what the command does. It can be as long as you
	 * want and it should explain well how the command behaves. This is
	 * shown, for example, when `??` is appended on a command. In that case,
	 * the short summary is extended with this longer description.
	 *
	 * Optional.
	 */
	const char *description;
	/**
	 * String used to identify the arguments. This usually comes together
	 * with the summary.
	 * TODO: explain how to differentiate between required and optional arguments
	 */
	const char *args_str;
	/**
	 * String that overrides the name+args_str usually used to describe the
	 * command.
	 *
	 * Optional.
	 */
	const char *usage;
	/**
	 * String to use as sub-commands suggestions instead of the
	 * auto-generated one (e.g. [abcd] or [?] that you can see near command
	 * names when doing `w?`). If not provided, the options will be
	 * auto-generated.
	 *
	 * Optional.
	 */
	const char *options;
	/**
	 * NULL-terminated array of details sections used to better explain how
	 * to use the command. This is shown together with the long description.
	 *
	 * Optional.
	 */
	const RzCmdDescDetail *details;
	/**
	 * Description of the arguments accepted by this command.
	 */
	const RzCmdDescArg *args;
} RzCmdDescHelp;

typedef enum rz_cmd_desc_type_t {
	/**
	 * For old handlers that parse their own input and accept a single string.
	 * Mainly used for legacy reasons with old command handlers.
	 */
	RZ_CMD_DESC_TYPE_OLDINPUT = 0,
	/**
	 * For handlers that accept argc/argv. It cannot have children. Use
	 * RZ_CMD_DESC_TYPE_GROUP if you need a command that can be both
	 * executed and has sub-commands.
	 */
	RZ_CMD_DESC_TYPE_ARGV,
	/**
	 * For cmd descriptors that are parent of other sub-commands, even if
	 * they may also have a sub-command with the same name. For example,
	 * `wc` is both the parent of `wci`, `wc*`, etc. but there is also `wc`
	 * as a sub-command.
	 */
	RZ_CMD_DESC_TYPE_GROUP,
	/**
	 * For cmd descriptors that are just used to group together related
	 * sub-commands. Do not use this if the command can be used by itself or
	 * if it's necessary to show its help, because this descriptor is not
	 * stored in the hashtable and cannot be retrieved except by listing the
	 * children of its parent. Most of the time you want RZ_CMD_DESC_TYPE_GROUP.
	 */
	RZ_CMD_DESC_TYPE_INNER,
	/**
	 * For entries that shall be shown in the help tree but that are not
	 * commands on their own. `|?`, `@?`, `>?` are example of this. It is
	 * useful to provide help entries for them in the tree, but there are no
	 * command handlers for these. The RzCmdDescDetail in the help can be
	 * used to show fake children of this descriptor.
	 */
	RZ_CMD_DESC_TYPE_FAKE,
	/**
	 * For handlers that accept argc/argv and that provides multiple output
	 * modes (e.g. rizin commands, quiet output, json, long). It cannot have
	 * children. Use RZ_CMD_DESC_TYPE_GROUP if you need a command that can
	 * be both executed and has sub-commands.
	 */
	RZ_CMD_DESC_TYPE_ARGV_MODES,
} RzCmdDescType;

typedef struct rz_cmd_desc_t {
	RzCmdDescType type;
	char *name;
	struct rz_cmd_desc_t *parent;
	int n_children;
	RzPVector children;
	const RzCmdDescHelp *help;

	union {
		struct {
			RzCmdCb cb;
		} oldinput_data;
		struct {
			RzCmdArgvCb cb;
		} argv_data;
		struct {
			struct rz_cmd_desc_t *exec_cd;
		} group_data;
		struct {
			RzCmdArgvModesCb cb;
			int modes;
		} argv_modes_data;
	} d;
} RzCmdDesc;

typedef struct rz_cmd_t {
	void *data;
	RzCmdNullCb nullcallback;
	RzCmdItem *cmds[UT8_MAX];
	RzCmdMacro macro;
	RzList *lcmds;
	RzList *plist;
	RzCmdAlias aliases;
	void *language; // used to store TSLanguage *
	HtUP *ts_symbols_ht;
	RzCmdDesc *root_cmd_desc;
	HtPP *ht_cmds;
	/**
	 * True if a rz_cons_instance exists. When used from RzCore this is
	 * commonly true. However, it can be used in tests to avoid access to
	 * non-initialized RzCons.
	 */
	bool has_cons;
} RzCmd;

// TODO: remove this once transitioned to RzCmdDesc
typedef struct rz_cmd_descriptor_t {
	const char *cmd;
	const char **help_msg;
	const char **help_detail;
	const char **help_detail2;
	struct rz_cmd_descriptor_t *sub[127];
} RzCmdDescriptor;

// TODO: move into rz_core.h
typedef struct rz_core_plugin_t {
	const char *name;
	const char *desc;
	const char *license;
	const char *author;
	const char *version;
	RzCmdCb call; // returns true if command was handled, false otherwise.
	RzCmdCb init;
	RzCmdCb fini;
} RzCorePlugin;

#define DEFINE_CMD_ARGV_DESC_DETAIL(core, name, c_name, parent, handler, help) \
	do { \
		RzCmdDesc *c_name##_cd = rz_cmd_desc_argv_new (core->rcmd, parent, #name, handler, help); \
		rz_warn_if_fail (c_name##_cd); \
	} while (0)
#define DEFINE_CMD_ARGV_DESC_SPECIAL(core, name, c_name, parent) \
	DEFINE_CMD_ARGV_DESC_DETAIL (core, name, c_name, parent, c_name##_handler, &c_name##_help)
#define DEFINE_CMD_ARGV_DESC_INNER(core, name, c_name, parent) \
	RzCmdDesc *c_name##_cd = rz_cmd_desc_inner_new (core->rcmd, parent, #name, &c_name##_help); \
	rz_warn_if_fail (c_name##_cd)
#define DEFINE_CMD_ARGV_GROUP_DETAIL(core, name, c_name, parent, exec_handler, help, group_help) \
	RzCmdDesc *c_name##_cd = rz_cmd_desc_group_new (core->rcmd, parent, #name, exec_handler, help, group_help); \
	rz_warn_if_fail (c_name##_cd)
#define DEFINE_CMD_ARGV_GROUP_EXEC(core, name, parent) \
	DEFINE_CMD_ARGV_GROUP_DETAIL (core, name, name, parent, name##_handler, &name##_help, &name##_group_help)
#define DEFINE_CMD_ARGV_GROUP_EXEC_SPECIAL(core, name, c_name, parent) \
	DEFINE_CMD_ARGV_GROUP_DETAIL (core, name, c_name, parent, c_name##_handler, &c_name##_help, &c_name##_group_help)
#define DEFINE_CMD_ARGV_GROUP_SPECIAL(core, name, c_name, parent) \
	DEFINE_CMD_ARGV_GROUP_DETAIL (core, name, c_name, parent, NULL, NULL, &c_name##_group_help)
#define DEFINE_CMD_ARGV_GROUP(core, name, parent) \
	DEFINE_CMD_ARGV_GROUP_DETAIL (core, name, name, parent, NULL, NULL, &name##_group_help)
#define DEFINE_CMD_ARGV_GROUP_MODES_EXEC_SPECIAL(core, name, c_name, parent, modes) \
	RzCmdDesc *c_name##_cd = rz_cmd_desc_group_modes_new (core->rcmd, parent, #name, modes, c_name##_handler, &c_name##_help, &c_name##_group_help); \
	rz_warn_if_fail (c_name##_cd)
#define DEFINE_CMD_ARGV_GROUP_MODES_EXEC(core, name, parent, modes) \
	DEFINE_CMD_ARGV_GROUP_MODES_EXEC_SPECIAL (core, name, name, parent, modes)
#define DEFINE_CMD_ARGV_MODES_SPECIAL(core, name, c_name, parent, modes) \
	RzCmdDesc *c_name##_cd = rz_cmd_desc_argv_modes_new (core->rcmd, parent, #name, modes, c_name##_handler, &c_name##_help); \
	rz_warn_if_fail (c_name##_cd)
#define DEFINE_CMD_ARGV_MODES(core, name, parent, modes) \
	DEFINE_CMD_ARGV_MODES_SPECIAL (core, name, name, parent, modes)
#define DEFINE_CMD_ARGV_DESC(core, name, parent) \
	DEFINE_CMD_ARGV_DESC_SPECIAL (core, name, name, parent)
#define DEFINE_CMD_OLDINPUT_DESC_SPECIAL(core, name, c_name, parent) \
	RzCmdDesc *c_name##_cd = rz_cmd_desc_oldinput_new (core->rcmd, parent, #name, c_name##_handler_old, &c_name##_help); \
	rz_warn_if_fail (name##_cd)
#define DEFINE_CMD_OLDINPUT_DESC(core, name, parent) \
	DEFINE_CMD_OLDINPUT_DESC_SPECIAL (core, name, name, parent)

#ifdef RZ_API
RZ_API int rz_core_plugin_init(RzCmd *cmd);
RZ_API int rz_core_plugin_add(RzCmd *cmd, RzCorePlugin *plugin);
RZ_API int rz_core_plugin_check(RzCmd *cmd, const char *a0);
RZ_API int rz_core_plugin_fini(RzCmd *cmd);

RZ_API RzCmd *rz_cmd_new(bool has_cons);
RZ_API RzCmd *rz_cmd_free(RzCmd *cmd);
RZ_API int rz_cmd_set_data(RzCmd *cmd, void *data);
RZ_API int rz_cmd_add(RzCmd *cmd, const char *command, RzCmdCb callback);
RZ_API int rz_core_del(RzCmd *cmd, const char *command);
RZ_API int rz_cmd_call(RzCmd *cmd, const char *command);
RZ_API RzCmdStatus rz_cmd_call_parsed_args(RzCmd *cmd, RzCmdParsedArgs *args);
RZ_API RzCmdDesc *rz_cmd_get_root(RzCmd *cmd);
RZ_API RzCmdDesc *rz_cmd_get_desc(RzCmd *cmd, const char *cmd_identifier);
RZ_API char *rz_cmd_get_help(RzCmd *cmd, RzCmdParsedArgs *args, bool use_color);

static inline RzCmdStatus rz_cmd_int2status(int v) {
	if (v == -2) {
		return RZ_CMD_STATUS_EXIT;
	} else if (v < 0) {
		return RZ_CMD_STATUS_ERROR;
	} else {
		return RZ_CMD_STATUS_OK;
	}
}

static inline int rz_cmd_status2int(RzCmdStatus s) {
	switch (s) {
	case RZ_CMD_STATUS_OK:
		return 0;
	case RZ_CMD_STATUS_ERROR:
	case RZ_CMD_STATUS_WRONG_ARGS:
	case RZ_CMD_STATUS_INVALID:
		return -1;
	case RZ_CMD_STATUS_EXIT:
	default:
		return -2;
	}
}

/* RzCmdDescriptor */
RZ_API RzCmdDesc *rz_cmd_desc_argv_new(RzCmd *cmd, RzCmdDesc *parent, const char *name, RzCmdArgvCb cb, const RzCmdDescHelp *help);
RZ_API RzCmdDesc *rz_cmd_desc_argv_modes_new(RzCmd *cmd, RzCmdDesc *parent, const char *name, int modes, RzCmdArgvModesCb cb, const RzCmdDescHelp *help);
RZ_API RzCmdDesc *rz_cmd_desc_inner_new(RzCmd *cmd, RzCmdDesc *parent, const char *name, const RzCmdDescHelp *help);
RZ_API RzCmdDesc *rz_cmd_desc_group_new(RzCmd *cmd, RzCmdDesc *parent, const char *name, RzCmdArgvCb cb, const RzCmdDescHelp *help, const RzCmdDescHelp *group_help);
RZ_API RzCmdDesc *rz_cmd_desc_group_modes_new(RzCmd *cmd, RzCmdDesc *parent, const char *name, int modes, RzCmdArgvModesCb cb, const RzCmdDescHelp *help, const RzCmdDescHelp *group_help);
RZ_API RzCmdDesc *rz_cmd_desc_oldinput_new(RzCmd *cmd, RzCmdDesc *parent, const char *name, RzCmdCb cb, const RzCmdDescHelp *help);
RZ_API RzCmdDesc *rz_cmd_desc_fake_new(RzCmd *cmd, RzCmdDesc *parent, const char *name, const RzCmdDescHelp *help);
RZ_API RzCmdDesc *rz_cmd_desc_parent(RzCmdDesc *cd);
RZ_API bool rz_cmd_desc_has_handler(RzCmdDesc *cd);
RZ_API bool rz_cmd_desc_remove(RzCmd *cmd, RzCmdDesc *cd);

#define rz_cmd_desc_children_foreach(root, it_cd) rz_pvector_foreach (&root->children, it_cd)

/* RzCmdParsedArgs */
RZ_API RzCmdParsedArgs *rz_cmd_parsed_args_new(const char *cmd, int n_args, char **args);
RZ_API RzCmdParsedArgs *rz_cmd_parsed_args_newcmd(const char *cmd);
RZ_API RzCmdParsedArgs *rz_cmd_parsed_args_newargs(int n_args, char **args);
RZ_API void rz_cmd_parsed_args_free(RzCmdParsedArgs *args);
RZ_API bool rz_cmd_parsed_args_setargs(RzCmdParsedArgs *arg, int n_args, char **args);
RZ_API bool rz_cmd_parsed_args_setcmd(RzCmdParsedArgs *arg, const char *cmd);
RZ_API char *rz_cmd_parsed_args_argstr(RzCmdParsedArgs *arg);
RZ_API char *rz_cmd_parsed_args_execstr(RzCmdParsedArgs *arg);
RZ_API const char *rz_cmd_parsed_args_cmd(RzCmdParsedArgs *arg);

#define rz_cmd_parsed_args_foreach_arg(args, i, arg) for ((i) = 1; (i) < (args->argc) && ((arg) = (args)->argv[i]); (i)++)

/* rz_cmd_macro */
RZ_API RzCmdMacroItem *rz_cmd_macro_item_new(void);
RZ_API void rz_cmd_macro_item_free(RzCmdMacroItem *item);
RZ_API void rz_cmd_macro_init(RzCmdMacro *mac);
RZ_API int rz_cmd_macro_add(RzCmdMacro *mac, const char *name);
RZ_API int rz_cmd_macro_rm(RzCmdMacro *mac, const char *_name);
RZ_API void rz_cmd_macro_list(RzCmdMacro *mac);
RZ_API void rz_cmd_macro_meta(RzCmdMacro *mac);
RZ_API int rz_cmd_macro_call(RzCmdMacro *mac, const char *name);
RZ_API int rz_cmd_macro_break(RzCmdMacro *mac, const char *value);

RZ_API bool rz_cmd_alias_del(RzCmd *cmd, const char *k);
RZ_API char **rz_cmd_alias_keys(RzCmd *cmd, int *sz);
RZ_API int rz_cmd_alias_set(RzCmd *cmd, const char *k, const char *v, int remote);
RZ_API char *rz_cmd_alias_get(RzCmd *cmd, const char *k, int remote);
RZ_API void rz_cmd_alias_free(RzCmd *cmd);
RZ_API void rz_cmd_macro_fini(RzCmdMacro *mac);

#ifdef __cplusplus
}
#endif

#endif
#endif