#pragma once
/*
 * Copyright (C) 2015-2019 Grégoire Passault <gregoire.passault@u-bordeaux.fr>
 * Copyright (C) 2019-2025  Adrien Boussicault <adrien.boussicault@labri.fr>
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/>.
 */
#include <Arduino.h>
#include <Preferences.h>
#include "serial_print.hpp"

namespace terminal_n {

enum paramter_type {
  NONE_PARAMETER,
  FLOAT_PARAMETER,
  DOUBLE_PARAMETER,
  INT_PARAMETER,
  UINT_PARAMETER,
  LONGINT_PARAMETER,
  LONGUINT_PARAMETER,
  BOOL_PARAMETER
};
/**
 * To defined a new command, use the MACRO
 * TERMINAL_COMMAND(terminal, name, description)
 *
 * @param name : the name of the command, without space, without quotes
 * @param description : the description of the command, with quote
 *
 * use terminal_print() to print on output
 * use the variables arc and argv to get the string of given arguments
 *
 * If you declared the terminal in the following way, in another file : 
 * 
 * #include "terminal.hpp"
 * terminal_n::Terminal terminal("The terminal\n\r");
 *
 * you can add that command in other file :
 *
 * #include "terminal.hpp"
 * extern terminal_n::Terminal terminal;
 *
 * TERMINAL_COMMAND(terminal, hello, "Print a friendly warming welcoming message")
 * {
 *     if (argc > 0) {
 *         terminal.print("Hello ");
 *         terminal.println(argv[0]);
 *         terminal.print("Other params: ");
 *         for (uint32_t i=1;i<argc;i++) {
 *             terminal.print(argv[i]);
 *             terminal.print(" ");
 *         }
 *         terminal.println("");
 *     } else {
 *         terminal.println("Hello world");
 *     }
 * }
 *
 *
 * WARNING: In order for the commands to be automatically registered with the 
 * terminal at startup, the file containing the setup() and loop() functions 
 * must be placed last in the list of files during the linking stage.
 *
 * In PlatformIO, to do this, simply begin the name of the file containing the 
 * loop() and setup() functions with the letter z.
 * 
 * For example: zzz_main.cpp.
 *
 */



const constexpr int MAX_EEPROM_NAME_LENGTH = 15;

/**
 * Prototype of a terminal command
 */
typedef void terminal_command_fn(uint32_t argc, char *argv[]);

/**
 * A command definition for the terminal
 */
struct terminal_command
{
    char *name;
    char *description;
    terminal_command_fn *command;
    paramter_type parameter;
    char *parameter_type;
    bool auto_save_after_command;
    volatile void* value_ptr;
    char eeprom_name[MAX_EEPROM_NAME_LENGTH+1];
};

inline float atof(char *str){
  int32_t sign = (str[0]=='-') ? -1 : 1;
  float f = atoi(str);
  char *savePtr;
  strtok_r(str, ".", &savePtr);
  char *floatPart = strtok_r(NULL, ".", &savePtr);
  if (floatPart != NULL) {
    float divide = 1;
    for (char *tmp=floatPart; *tmp!='\0'; tmp++) {
      divide *= 10; 
    }   
    f += sign*atoi(floatPart)/divide;
  }
  return f;
}

#ifndef PREFERENCES_NAMESPACE
  #define PREFERENCES_NAMESPACE "terminal"
#endif
#ifndef PREFERENCES_NVS_PART
  #define PREFERENCES_NVS_PARTITION "nvs"
#endif
#ifndef TERMINAL_BUFFER_SIZE
  /**
   * Maximum length of a command line
   * and its argument
   */
  #define TERMINAL_BUFFER_SIZE 64
#endif
#ifndef TERMINAL_MAX_ARGUMENTS
  /**
   * Maximum number of command arguments
   */
  #define TERMINAL_MAX_ARGUMENTS 12
#endif
#ifndef TERMINAL_MAX_COMMANDS
  /**
   * Maximum number of commands
   * which ca be registered
   */
  #define TERMINAL_MAX_COMMANDS 100
#endif

struct Terminal {
  const char* documentation;
  Preferences preferences;
  static const constexpr char* preferences_namespace = PREFERENCES_NAMESPACE;
  static const constexpr char* preferences_nvs_partition = PREFERENCES_NVS_PARTITION;

  static constexpr const int terminal_buffer_size = TERMINAL_BUFFER_SIZE; 
  static constexpr const int terminal_max_arguments = TERMINAL_MAX_ARGUMENTS; 
  static constexpr const int terminal_max_commands = TERMINAL_MAX_COMMANDS;

  char terminal_buffer[terminal_buffer_size] = {0};

  HardwareSerial* io = 0;
  bool silent;
  bool disabled = false;
  bool terminal_last_ok = false;
  uint32_t terminal_last_pos = 0;
  uint32_t terminal_pos = 0;
  bool terminal_echo_mode = true;

  uint32_t terminal_command_count = 0;
  const struct terminal_command *terminal_commands[terminal_max_commands];

  static constexpr const char* PROMPT = "$ ";

  Terminal(const char* documentation=""):
    documentation(documentation)
  {}

  inline void write_char(char c){
    if(!silent){ io->write(c); }
  }
  inline void write(const char* buf, uint32_t len){
    if(!silent){ io->write((const uint8_t*)buf, len); }
  }
  template <typename T>
  inline void print(T v){
    if(!silent){ serial_print(io, v); }
  }
  template <typename T>
  inline void println(T v){
    if(!silent){ serial_println(io, v); }
  }
  template <typename T>
  inline void print_hex(T v){
    if(!silent){ serial_print_hex(io, v); }
  }
  template <typename T>
  inline void println_hex(T v){
    if(!silent){ serial_println_hex(io, v); }
  }
  inline bool terminal_has_io(){
    return io;
  }
  inline void print_hexa(uint8_t* buf, uint32_t n){
    uint8_t first=0, last=0;
    for( uint32_t i=0; i<n; i++ ){
      first = buf[i] >> 4;
      last = buf[i] & 0x0F;
      print( 'x' );
      print( static_cast<char>( (first < 10 ? '0' : 'A'-10) + first ) );
      print( static_cast<char>( (last < 10 ? '0' : 'A'-10) + last ) );
    }
  }
  inline void println_hexa(uint8_t* buf, uint32_t n){
    print_hexa(buf,1);
    println("");
  }

  /**
   * Resets the terminal
   */
  void reset();

  /**
   * Enable the terminal
   */ 
  void enable();

  /**
   * Disable the terminal
   */ 
  void disable();

  void print_prompt();

  void setup(HardwareSerial* serial);
  /**
   * Terminal update
   * Call this function in your main loop 
   * to fetch serial port and handle terminal
   */
  void update();

  const terminal_command * find_command(
    char *command_name, uint32_t command_name_length
  );

  bool terminal_execute(
    char *command_name, uint32_t command_name_length, uint32_t argc, char **argv
  );

  void terminal_process();

  bool have_to_be_saved_in_eeprom(const terminal_command *command);
  void check_eeprom_names();
  void save_value_to_eeprom(const terminal_command *command);
  bool save_config_to_eeprom(const char* eeprom_name);
  void save_config_to_eeprom();
  void load_config_from_eeprom(bool enable_print=true);
  bool load_config_from_eeprom(const char* eeprom_name, bool enable_print);
  void load_value_from_eeprom(
    const terminal_command *command, bool enable_print=false
  );
  void print_saved_parameter(const terminal_command *command);
  void print_value_from_eeprom(const struct terminal_command *command);
  void print_config_from_eeprom();
  bool print_config_from_eeprom(const char* eeprom_name);
  void reset_to_constructor_config();
  bool reset_to_constructor_config(const char* eeprom_name);


  /**
   * Registers a command
   */
  void register_command(struct terminal_command *command);


  /**
   * Mute the terminal
   */
  void terminal_silent(bool silent);
  void displayHelp(bool parameter);
  void terminal_params_show();

  void echo_command(uint32_t argc, char *argv[]);
  void params_command(uint32_t argc, char *argv[]);

};









/**
 * ----------------------------------------------------------------------------
 * ----------------------------------------------------------------------------
 * ----------------------------------------------------------------------------
 */




#define TERMINAL_COMMAND_INTERNAL(term, name, eeprom_name, description, parameter, parameterType, auto_save_after_command, value_ptr) terminal_n::terminal_command_fn terminal_command_ ## name; \
    \
    char terminal_command_name_ ## name [] = #name; \
    char terminal_command_description_ ## name [] = description; \
    \
    struct terminal_n::terminal_command terminal_command_definition_ ## name = { \
        terminal_command_name_ ## name , \
        terminal_command_description_ ## name , \
        terminal_command_ ## name, \
        parameter, \
        parameterType, \
        auto_save_after_command, \
        value_ptr, \
        eeprom_name \
    }; \
    \
    __attribute__((constructor)) \
    void terminal_command_init_ ## name () {  \
        term.register_command(&terminal_command_definition_ ## name ); \
    } \
    \
    void terminal_command_ ## name (uint32_t argc, char *argv[])

#define TERMINAL_COMMAND(term, name, description) \
    TERMINAL_COMMAND_INTERNAL(term, name, "", description, terminal_n::NONE_PARAMETER, NULL, false, NULL)



#define TERMINAL_PARAMETER(term, name, eeprom_name, description, startValue, type, enum_type, conversion, auto_save_after_command, filter_function, finish_function) \
    volatile static type name = startValue; \
    char terminal_parameter_type_ ## name [] = #type; \
    \
    TERMINAL_COMMAND_INTERNAL(term, name, eeprom_name, description, enum_type, terminal_parameter_type_ ## name, auto_save_after_command, &name) \
    { \
        type g; \
        if (argc) { \
            g = conversion(argv[0]); \
            if( filter_function(g, name) ){ \
              type old = name; \
              name = g; \
              finish_function(name, old); \
            } \
        } \
        term.print( #name ); \
        term.print("="); \
        term.println( name ); \
    }


template <typename T>
inline bool filter_nothing(T & new_value, T old_value){return true;}

template <typename T>
inline void do_nothing(T new_value, T old_value){}

#define TERMINAL_PARAMETER_FLOAT(term, name, eeprom_name, description, startValue, auto_save_after_command, filter_function, finish_function) \
    TERMINAL_PARAMETER(term, name, eeprom_name, description, startValue, float, terminal_n::FLOAT_PARAMETER, terminal_n::atof, auto_save_after_command, filter_function, finish_function)

#define TERMINAL_PARAMETER_DOUBLE(term, name, eeprom_name, description, startValue, auto_save_after_command, filter_function, finish_function) \
    TERMINAL_PARAMETER(term, name, eeprom_name, description, startValue, double, terminal_n::DOUBLE_PARAMETER, terminal_n::atof, auto_save_after_command, filter_function, finish_function)

#define TERMINAL_PARAMETER_INT(term, name, eeprom_name, description, startValue, auto_save_after_command, filter_function, finish_function) \
    TERMINAL_PARAMETER(term, name, eeprom_name, description, startValue, int32_t, terminal_n::INT_PARAMETER, atoi, auto_save_after_command, filter_function, finish_function)


#define TERMINAL_PARAMETER_UINT(term, name, eeprom_name, description, startValue, auto_save_after_command, filter_function, finish_function) \
    TERMINAL_PARAMETER(term, name, eeprom_name, description, startValue, uint32_t, terminal_n::UINT_PARAMETER, atoi, auto_save_after_command, filter_function, finish_function)

#define TERMINAL_PARAMETER_LONGINT(term, name, eeprom_name, description, startValue, auto_save_after_command, filter_function, finish_function) \
    TERMINAL_PARAMETER(term, name, eeprom_name, description, startValue, int64_t, terminal_n::LONGINT_PARAMETER, atoi, auto_save_after_command, filter_function, finish_function)

#define TERMINAL_PARAMETER_LONGUINT(term, name, eeprom_name, description, startValue, auto_save_after_command, filter_function, finish_function) \
    TERMINAL_PARAMETER(term, name, eeprom_name, description, startValue, uint64_t, terminal_n::LONGUINT_PARAMETER, atoi, auto_save_after_command, filter_function, finish_function)

#define TERMINAL_PARAMETER_BOOL(term, name, eeprom_name, description, startValue, auto_save_after_command, filter_function, finish_function) \
    TERMINAL_PARAMETER(term, name, eeprom_name, description, startValue, bool, terminal_n::BOOL_PARAMETER, (bool)atoi, auto_save_after_command, filter_function, finish_function)

#define TERMINAL_ADD_DEFAULT_COMMANDS(term) \
  TERMINAL_COMMAND(term, save_config, "Save the config to EEPROM (save_config [eeprom_name])") \
  { \
    if(argc !=0 and argc != 1){ term.println("Invalid parameters"); return; } \
    if(argc == 0){ \
      term.save_config_to_eeprom(); \
      term.println("All is saved."); \
    }else{ \
      if( \
        term.save_config_to_eeprom(argv[0]) \
      ){ \
        term.println("Saved.");\
      }else{ \
        term.println("Failed.");\
      }; \
    } \
  } \
  \
  TERMINAL_COMMAND(term, load_config, "Load config from EEPROM (load_config [eeprom_name])") \
  { \
    bool print = true; \
    if(argc !=0 and argc != 1){ term.println("Invalid parameters"); return; } \
    if(argc == 0){ \
      term.load_config_from_eeprom(print); \
    }else{ \
      if( \
        ! term.load_config_from_eeprom(argv[0], print) \
      ){ \
        term.println("Failed.");\
      }; \
    } \
  } \
  \
  TERMINAL_COMMAND(term, reset_config, "Reset to constructor configuration (reset_config [eeprom_name])") \
  { \
    if(argc !=0 and argc != 1){ term.println("Invalid parameters"); return; } \
    if(argc == 0){ \
      term.reset_to_constructor_config(); \
      term.println("All is reseted."); \
    }else{ \
      if( \
        term.reset_to_constructor_config(argv[0]) \
      ){ \
        term.println("Reseted.");\
      }else{ \
        term.println("Failed.");\
      }; \
    } \
  } \
  \
  TERMINAL_COMMAND(term, print_config, "Print EEPROM configuration (print_config [eeprom_name])") \
  { \
    if(argc !=0 and argc != 1){ term.println("Invalid parameters"); return; } \
    if(argc == 0){ \
      term.print_config_from_eeprom(); \
    }else{ \
      if( \
        ! term.print_config_from_eeprom(argv[0]) \
      ){ \
        term.println("Failed.");\
      }; \
    } \
  } \
  \
  TERMINAL_COMMAND(term, help, "Displays the help about commands") \
  { \
      term.displayHelp(false); \
  } \
  \
  TERMINAL_COMMAND(term, params, "Displays the available parameters. Usage: params [show]") \
  { \
    term.params_command(argc, argv); \
  } \
  \
  TERMINAL_COMMAND(term, echo, "Switch echo mode. Usage echo [on|off]") \
  { \
    term.echo_command(argc, argv); \
  }

}