/*
 * configPWR.h
 * File-class for PWR-Switch
 * for configuration of data
 * 
 * author Creator P.Rebesky
 * Copyright (©): 2020-2022 by Peter Rebesky
 * This code can use in private cases only. Every business or companies using of this codes or codes parts is required an approval of us (me)
 * Every private use can exchange some parts of code or modify some code-lines. This code can change for private use only.
 * This software is basicly owned by Peter Rebesky and any comercial using is forbidden without approval of us (me).
 * Version 0.09 
 * 06.10.2022 
 */
// class for manage config-data into and from file "config.ini"

#include <LittleFS.h> // LittleFS is declared

#define ReglerName  "rname"
#define ActionOn  "von"
#define ActionOff  "voff"
#define WaitOn  "wait"
#define ScanMeter  "scan"
#define MeterIP  "turl"
#define ActionRelais  "ract"
#define UpdateUrl "upser"

/***** class for save data intern into ESP8266 *****/
class configPWR {
  private:
  	String TARGET_METER;
    String UPDATE_SERVER;
    String NAME_PWR;
    int VALUE_ACTION_ON = 0;
    int VALUE_ACTION_OFF = 0;
    int WAIT_TIME_ACTION = 1;
    int SCAN_METER = 2;
    int ACTION_RELAIS = 0;  // negative or zero value turned automatic off, positive value turned on
  	bool MOUNTED = false;
  	void loadConfig(String s);
    int calculateFreeSpaceFS();
    String decodeOnValue(String s);
    unsigned char h2int(char c);
	
  public:
    int  FREESPACE=0;
    bool AUTOMATIC = true;
    bool begin();		// start to get data from file
    void end();
    int getValueON();
    void setValueON(int value);
    int getValueOFF();
    void setValueOFF(int value);
    int getWaitAction();
    void setWaitAction(int value);
    int getScanTime();
    void setScanTime(int value);
    String getPName();
    bool setPName(String nameDTZ);
  	String getTargetMeter();
    bool setTargetMeter(String url);
    String getUpdateServer();
    bool setUpdateServer(String url);
    bool readConfig();
    bool saveConfig();
    int getFreeSpace();
    bool savePostValues(String saveValues);
    String urldecode(String str);
    String urlencode(String str);
    String getOnePostValue(String post,String value);
    String getOneFileValue(String file,String ident);
    bool getActionOn();
};
/**** mount the file-object ****/
bool configPWR::begin(){
	if(LittleFS.begin()){
		this->MOUNTED = this->readConfig();
    this->calculateFreeSpaceFS();
	}
	return this->MOUNTED;
}
/**** read values from file ****/
bool configPWR::readConfig(){
String s;
bool r=false;
File Fconfig = LittleFS.open("/config.ini","r");
  Fconfig = LittleFS.open("/config.ini","r");
	if (Fconfig){
		s=Fconfig.readString();
		this->loadConfig(s);
		Fconfig.close();
		r = true;
	}
return r;
}
/****** for compatibility ******/
void configPWR::end(){
//	do nothing, it's for compatibility only
}
/******** handle value for switch on ********/
int configPWR::getValueON(){
return this->VALUE_ACTION_ON;
}
void configPWR::setValueON(int value){
  this->VALUE_ACTION_ON = value;
}
/******** handle value for switch off ******/
int configPWR::getValueOFF(){
return this->VALUE_ACTION_OFF;
}
void configPWR::setValueOFF(int value){
  this->VALUE_ACTION_OFF = value;
}
/******** handle value for wait time ******/
int configPWR::getWaitAction(){
return this->WAIT_TIME_ACTION;
}
void configPWR::setWaitAction(int value){
  this->WAIT_TIME_ACTION = value;
}
/******** handle value for scan meter time ******/
int configPWR::getScanTime(){
return this->SCAN_METER;
}
void configPWR::setScanTime(int value){
  this->SCAN_METER = value;
}
/******** handle PWR-name *******/
String configPWR::getPName(){
  return this->NAME_PWR;
}
bool configPWR::setPName(String namep){
  bool r=false;
  if(namep){
    this->NAME_PWR = namep;
    r = true;
  }
return r;
}
/******** automatic on / off **************/
bool configPWR::getActionOn(){
  if(this->ACTION_RELAIS>0)return true;
  else return false;
}
/******** handle target meter ******/
String configPWR::getTargetMeter(){
return this->TARGET_METER;	
}
bool configPWR::setTargetMeter(String url){
  bool r=false;
  if(url){
    this->TARGET_METER = url;
    r = true;
  }
return r;
}
/****** handle update server ******/
String configPWR::getUpdateServer(){
return this->UPDATE_SERVER;  
}
bool configPWR::setUpdateServer(String url){
  bool r=false;
  if(url){
    this->UPDATE_SERVER = url;
    r = true;
  }
return r;
}
/**** save actuelle config-data ****/
bool configPWR::saveConfig(){
  bool r = false;
  String s = "{\n";
  s += "action_on: \"";  s += this->VALUE_ACTION_ON;  s += "\",\n";
  s += "action_off: \"";  s += this->VALUE_ACTION_OFF;  s += "\",\n";
  s += "waittime: ";  s += this->WAIT_TIME_ACTION;  s += ",\n";
  s += "scantime: ";  s += this->SCAN_METER;  s += ",\n";
  s += "action_r: ";  s += this->ACTION_RELAIS;  s += ",\n";
  s += "url: \"";  s += this->TARGET_METER;  s += "\",\n";
  s += "namepwr: \"";  s += this->NAME_PWR;  s += "\",\n";
  s += "upserv: \""; s += this->UPDATE_SERVER; s += "\",\n";
  s += "}";
//  Serial.println(s);
  if(this->MOUNTED){
    File Fconfig = LittleFS.open("/config.ini","w");
    if (Fconfig){
      int w=Fconfig.print(s);
      Fconfig.close();
      if (w > 1) r = true;  // write file was successful
    }
  }
return r;
}
//******************* load one value from saved config *****************
String configPWR::getOneFileValue(String file,String ident){
String ret;
  int argBegin = file.indexOf(ident);
  if(argBegin>0){
    int argEnd = file.indexOf(",",argBegin+2);
    ret = this->decodeOnValue(file.substring(argBegin, argEnd));
  }
return ret;
}
/**** decode file-data and save into class ****/
void configPWR::loadConfig(String s){
    String _oneValue="";
    _oneValue=getOneFileValue(s,"action_on");
    this->VALUE_ACTION_ON=_oneValue.toInt();
    _oneValue=getOneFileValue(s,"action_off");
    this->VALUE_ACTION_OFF=_oneValue.toInt();
    _oneValue=getOneFileValue(s,"waittime");
    this->WAIT_TIME_ACTION=_oneValue.toInt();
    _oneValue=getOneFileValue(s,"scantime");
    this->SCAN_METER=_oneValue.toInt();
    _oneValue=getOneFileValue(s,"action_r");
    this->ACTION_RELAIS=_oneValue.toInt();
    this->TARGET_METER=getOneFileValue(s,"url");
    this->UPDATE_SERVER=getOneFileValue(s,"upserv");
    this->NAME_PWR=getOneFileValue(s,"namepwr");
}
/**** extract one value from string ****/
String configPWR::decodeOnValue(String s){
  int valueBegin = s.indexOf("\"");
  int valueLength = s.length();
  if(valueLength >0){
    if(valueBegin > 0){
      s = s.substring(valueBegin+1,valueLength-1);
    }
    else {
      valueBegin = s.indexOf(":");
      s = s.substring(valueBegin+1,valueLength);
    }
  }
  else s = "";
  return s;
}
/****** get free space from file-system ******/
int configPWR::calculateFreeSpaceFS(){
   if(MOUNTED){
    FSInfo fsinfo;
    LittleFS.info(fsinfo);
    FREESPACE = fsinfo.totalBytes - fsinfo.usedBytes;
  }
  else FREESPACE = 0;
  return FREESPACE;
}
int configPWR::getFreeSpace(){
  return this->FREESPACE;
}
//******************* decode post-values *******************************
String configPWR::getOnePostValue(String post,String value){
  String returnValue="";
  if(post.length()>0){
    int mmenBegin = post.indexOf(value);
    if(mmenBegin >= 0){
      int argEnd = post.indexOf("&",mmenBegin);
      if (argEnd == -1) argEnd = post.length();
      returnValue = post.substring(post.indexOf("=",mmenBegin)+1, argEnd);
    }
  }
  return this->urldecode(returnValue);  
}
/***** decode values from html-post-arguments *****/
bool configPWR::savePostValues(String saveValues){
bool r=false;
String setValue;
Serial.println(saveValues);
  this->NAME_PWR=getOnePostValue(saveValues,ReglerName);
  this->TARGET_METER=getOnePostValue(saveValues,MeterIP);
  this->UPDATE_SERVER=getOnePostValue(saveValues,UpdateUrl);
  setValue=getOnePostValue(saveValues,ActionOn);
  this->VALUE_ACTION_ON=setValue.toInt();
  setValue=getOnePostValue(saveValues,ActionOff);
  this->VALUE_ACTION_OFF=setValue.toInt();
  setValue=getOnePostValue(saveValues,WaitOn);
  this->WAIT_TIME_ACTION=setValue.toInt();
  setValue=getOnePostValue(saveValues,ScanMeter);
  this->SCAN_METER=setValue.toInt();
  setValue=getOnePostValue(saveValues,ActionRelais);
  this->ACTION_RELAIS=setValue.toInt();
  this->saveConfig();
return true;
}
/***** url decoding part *****/
unsigned char configPWR::h2int(char c)
{
    if (c >= '0' && c <='9') return((unsigned char)c - '0');
    if (c >= 'a' && c <='f') return((unsigned char)c - 'a' + 10);
    if (c >= 'A' && c <='F') return((unsigned char)c - 'A' + 10);
    return(0);
}
/***** url decoding function ******/ 
String configPWR::urldecode(String str)
{
    String encodedString="";
    char c;
    char code0;
    char code1;
    for (int i =0; i < str.length(); i++){
      c=str.charAt(i);
      if (c == '+') encodedString+=' ';  
      else if (c == '%') {
        i++;
        code0=str.charAt(i);
        i++;
        code1=str.charAt(i);
        c = (h2int(code0) << 4) | h2int(code1);
        encodedString+=c;
      }
      else encodedString+=c;  
      yield();
    }
   return encodedString;
}
/***** url encoding function ******/ 
String configPWR::urlencode(String str)
{
    String encodedString="";
    char c;
    char code0;
    char code1;
    char code2;
    for (int i =0; i < str.length(); i++){
      c=str.charAt(i);
      if (c == ' ') encodedString+= '+';
      else if (isalnum(c)) encodedString+=c;
      else{
        code1=(c & 0xf)+'0';
        if ((c & 0xf) >9) code1=(c & 0xf) - 10 + 'A';
        c=(c>>4)&0xf;
        code0=c+'0';
        if (c > 9) code0=c - 10 + 'A';
        code2='\0';
        encodedString+='%';
        encodedString+=code0;
        encodedString+=code1;
        //encodedString+=code2;
      }
      yield();
    }
    return encodedString;
}
//*** class end