//======================================================
// REACTION GAME MAIN ROUTINE
//======================================================

  /* REACTION GAME SETTINGS PARAMETERS NOTE:
   * ------------------------------------------
   *  
   *  FORMAT :
   *  --------
   *    {"tr": 10, "mn": 1, "mx": 2}
   *  
   *  MEANNING :
   *  ----------
   *    tr : trials pre counter
   *    mn : minimum delay, between trials
   *    mx : maximum delay, between trials
   *  
   *  THINGS THAT ENDS THE GAME :
   *  ---------------------------
   *    1. BY COUNT DOWN "tr" REACH TO ZERO
   *    2. BY A COMMAND "FROM APP VIA BLUETOOTH"
   *  
   *  CALCULATING RESULTS :
   *  ---------------------
   *    Rapid Kick Speed = Number Of Kickes Made / Elasped Time In Sec
   */

//======================================================

  void game_reaction(String settings)
  {
    //------------------------------------------------------
    // START OF READING THE SETTINGS
    //------------------------------------------------------
    
    // CONVERTING GAME TEXT TO JSON
    DynamicJsonDocument play(JSON_CAPACITY);
    
    // Deserialize the JSON document
    DeserializationError error = deserializeJson(play, settings);

    // JSON ERROR
    if(error) {
      dualcomm(JSON_ERROR);
      return;
    }

    // PUBLIC VARIABLES
    uint8_t   minDelay    = play["mn"];
    uint8_t   maxDelay    = play["mx"];
    uint16_t  trials      = play["lm"];
    uint16_t  temp        = trials;
    
    // Clearing Buffer
    play.clear();

    //------------------------------------------------------
    // PREPARE FOR GAME START
    //------------------------------------------------------
    
    // Display Welcome Message
//    TERMINAL("");
//    TERMINAL("==================================================");
//    TERMINAL(" -->> Reaction Game Settings");
//    TERMINAL("--------------------------------------------------");
//    TERMINAL("trials    : " + String(trials) + " Strikes");
//    TERMINAL("try delay : " + String(minDelay) + " to " + String(maxDelay) + " Seconds");
//    TERMINAL("--------------------------------------------------");
//    TERMINAL("2 Seconds To Start Get Ready & Good Luck !!");
//    TERMINAL("==================================================");
//    TERMINAL("");

    // Ready Signal
    Reaction_Start();

    // Main Variables
    uint16_t      sdelay    = 0;
    uint16_t      power     = 0;
    uint16_t      response  = 0;
    unsigned long startTime = 0;
    unsigned long stopTime  = 0;

    // Processing Results
    for(int i=0; i<trials; i++)
    {
      // Reading Kick Data
      terminal(" ------ Trial Number (" + String(i + 1) + ") ------");
      terminal(" -> Get Ready !!");

      // Set Random Delay Time
      sdelay = random(minDelay, (maxDelay + 1));
      sdelay *= 1000;
      delay(sdelay);

      // Light Up Green
      rgbLED(0, 150, 0);

      // Start Timer
      startTime = millis();

      // Sensing Strike Power
      while(power < PWR) 
      {
        // Reading The Strike
        power = readImpact();

        // If Stop Command Came From Smart Phone
        if(isBluetooth)
        {
          String msg = BLUETOOTH.readString();
          msg.trim();
          if(msg == CM_STOP) {
            dualcomm(GAME_OVER);
            Reaction_End();
            // LightUp
            //LED_RED();
            //delay(2000);
            // Red FadeOut
            //LED_RED_FADEOUT();
            // RESET
            return;
          }
          else if(msg == CM_RESET) {
            trials = temp;
            break;
          }
        }
      }
  
      // Stop Timer
      stopTime = millis();
  
      // Stop Light
      rgbLED(150, 0, 0);
  
      // Calculating Response Time
      response = stopTime - startTime - 1;
  
      // Create Json Data
      String msg = reaction_data_json(i+1, power, response, sdelay);
      
      // Print To TERMINAL
      dualcomm(msg);
      
      // Clear All
      sdelay    = 0;
      power     = 0;
      response  = 0;
    }

    // Red Light Delay
    delay(500);

    // END GAME
//    TERMINAL("");
//    TERMINAL("---------------------------------------------------");
    dualcomm(GAME_OVER);
//    TERMINAL("===================================================");
//    TERMINAL("");

    // Celebration
    Reaction_Celebration();
    
    // Blink Red
    //Reaction_End();

    // Return To Game Selector
    return;
  }

//======================================================
// REACTION DATA JSON -> To Send Back To Server
//======================================================

  String reaction_data_json(unsigned int count, unsigned int power, unsigned int response, unsigned int startDelay)
  {  
    // Building The Buffer
    DynamicJsonDocument   data(JSON_CAPACITY);

    // Convert To Seconds Unit
    float re = response;
    re /= 1000;

    // Asignning Values
    data["ct"]  = count;            // Strike Number
    data["pw"]  = power;            // Strike Power In Analog Read
    data["sd"]  = startDelay/1000;  // LED Strip Start Delay in Seconds
    data["re"]  = String(re, 3).toFloat();    // Strike Reaction Time In Milli Sec
    
    String output;
    serializeJson(data, output);
    data.clear();
    return output;
  }

//======================================================
// REACTION GAME START LED SIGNAL
//======================================================

  void Reaction_Start()
  {
    LED_WHITE_CROSSFADE(3);
    LED_RED_FADEIN();
  }

//======================================================
// REACTION GAME END SINGNAL LED SIGNAL
//======================================================

  void Reaction_End()
  {
    LED_RED_BLINK(2);
    LED_RED_FADEOUT();
  }

//======================================================
// REACTION GAME START LED CELEBRATION
//======================================================

  void Reaction_Celebration()
  {
    // LightUp
    rainbowCycle(2);
    // Grean Light OUT
    LED_GREEN_FADEOUT();
  }

//======================================================
// REACTION GAME RESET LED SIGNAL
//======================================================

  void Reaction_Reset()
  {
    LED_BLUE();
    delay(250);
    LED_BLUE_FADEOUT();
  }