/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#ifndef __SHELL_H__
#define __SHELL_H__

#ifdef __cplusplus
extern "C" {
#endif

#include "os/mynewt.h"

struct os_eventq;

/** @brief Callback called when command is entered.
 *
 *  @param argc Number of parameters passed.
 *  @param argv Array of option strings. First option is always command name.
 *
 * @return 0 in case of success or negative value in case of error.
 */
typedef int (*shell_cmd_func_t)(int argc, char *argv[]);

struct shell_param {
    const char *param_name;
    const char *help;
};

struct shell_cmd_help {
    const char *summary;
    const char *usage;
    const struct shell_param *params;
};

struct shell_cmd {
    const char *sc_cmd;
    shell_cmd_func_t sc_cmd_func;
    const struct shell_cmd_help *help;
};

struct shell_module {
    const char *name;
    const struct shell_cmd *commands;
};

/** @brief Register a shell_module object
 *
 *  @param shell_name Module name to be entered in shell console.
 *
 *  @param shell_commands Array of commands to register.
 *  The array should be terminated with an empty element.
 */
int shell_register(const char *shell_name,
                   const struct shell_cmd *shell_commands);

/** @brief Optionally register an app default cmd handler.
 *
 *  @param handler To be called if no cmd found in cmds registered with
 *  shell_init.
 */
void shell_register_app_cmd_handler(shell_cmd_func_t handler);

/** @brief Callback to get the current prompt.
 *
 *  @returns Current prompt string.
 */
typedef const char *(*shell_prompt_function_t)(void);

/** @brief Optionally register a custom prompt callback.
 *
 *  @param handler To be called to get the current prompt.
 */
void shell_register_prompt_handler(shell_prompt_function_t handler);

/** @brief Optionally register a default module, to avoid typing it in
 *  shell console.
 *
 *  @param name Module name.
 */
void shell_register_default_module(const char *name);

/** @brief Optionally set event queue to process shell command events
 *
 *  @param evq Event queue to be used in shell
 */
void shell_evq_set(struct os_eventq *evq);

#if MYNEWT_VAL(SHELL_NEWTMGR)
struct os_mbuf;
typedef int (*shell_nlip_input_func_t)(struct os_mbuf *, void *arg);
int shell_nlip_input_register(shell_nlip_input_func_t nf, void *arg);
int shell_nlip_output(struct os_mbuf *m);
#endif

#if MYNEWT_VAL(SHELL_COMPAT)
int shell_cmd_register(const struct shell_cmd *sc);
#endif

#ifdef __cplusplus
}
#endif

#endif /* __SHELL_H__ */