ATTAG bye bye HC-12, welcome WiFi LR?

// This is version 0.1 of the server code
// it was made using platformio and squareline studio, it doesn't work in arduino IDE as it currently is
#include <esp32_smartdisplay.h>      // lib required to use the display 
#include <ui/ui.h>                   // the ui made with SquarelineStudio                       
#include <Audio.h>                   // to enable beeps 
#include <SoftwareSerial.h>          // to enable serial communication, due to mess at gitHUB this is currecntly directly in the /src and src/curclular_queue directories
#include <SD.h>
Audio *audio;

const long ledinterval = 1000;       // blink pause time for the LED 1000ms = 1s                           
ulong next_millis;                   // helping variable for the blink timer
unsigned long previousMillis = 0;    // helping variable for the blink timer
unsigned long currentMillis = millis();
int players[16];                     // array of the blasters/players
int playerid;                        // id of the blaster/player
int ledswitch = 0;                   // required for the LED blink timer
int numplayers;                      // used to hold the numbe rof players read from the dropdown selectbox
int status=0;                        // current state of the program
int colors[3];                       // array to hold colors for the player state buttons
int s1=0;                            // int to hold numbers of players in status 1
int s2=0;                            // int to hold numbers of players in status 2
int percent=0;                       // into to hold percentage of players who joined, used for the status bar  
byte gd=0;                           // gamedata byte
byte gd2=0;                          // gamedata byte2 with checksum 
#define SD_CS   5
int SDready=0;
File logFile;


// define some colors for the player status "buttons"
lv_color_t color  = lv_color_hex(0x505050);
lv_color_t red    = lv_color_hex(0xAA0000);
lv_color_t yellow = lv_color_hex(0xAAAA00);
lv_color_t green  = lv_color_hex(0x009000);

// set the GPIO pins for 433MHz communication
SoftwareSerial hc12(35,22);

// this function builds the game data byte 
// where each option corresponds to 2 bits
// [GAME MODE][SHOTS PER MAG][RESPAWNS][BATTLE TIME]
// 00 00 00 00
void makegdbyte(int sb,int sel) {  
    switch (sel) {
      case 0: bitClear(gd,7-sb*2); bitClear(gd,6-sb*2);break;
      case 1: bitClear(gd,7-sb*2); bitSet(gd,6-sb*2);  break;
      case 2: bitSet(gd,7-sb*2);   bitClear(gd,6-sb*2);break;
      case 3: bitSet(gd,7-sb*2);   bitSet(gd,6-sb*2);  break;      
    }   
}

void watchgame() {
  // is HC12 433Mhz serial communication available?
   if (hc12.available()) { 
   } 
}

// function read the SD path and look for existing files to create a new id for the new logfile
int getnewfileid(File dir, int numTabs)
{
  int oldid=0;
  while (true)
  {
    File filename =  dir.openNextFile();
    if (! filename) { break; }
    // check for files that contain "attag"
    char *ptr = strstr(filename.name(), "attag");
    if (ptr != nullptr) {
      ptr+=strlen("attag");
      Serial.println(atoi(ptr));
      if (oldid<atoi(ptr)) oldid=atoi(ptr);
    }
    filename.close();
  }
  return (oldid+1);  
}



void startgame() {
  Serial.print("starting game..STATUS:");
  Serial.println(status);
  // switch to ingame screen and go to watchgame
  _ui_screen_change(&ui_Ingame, LV_SCR_LOAD_ANIM_MOVE_LEFT, 500, 0, &ui_Ingame_screen_init);

  // write logfile only if SD card is available
  if (SDready==1) {  

  File path = SD.open("/");
   
  // logfile for the game stored on the SD card
  // logFile = SD.open("fileName", FILE_APPEND);
  char filename[] = "00000000.csv";
  sprintf(filename,"/attag%02d.csv", getnewfileid(path,0));

  // open the logfile for writing
  logFile = SD.open(filename, FILE_WRITE);
 
  // if the logfile is ready for writing
  if (logFile) {   
    // write a header with the game data to the csv
    char buf[16];    
    logFile.println("Game mode;Number of players;Shots per mag;Respawns;Battle time;Friendly fire");
    lv_dropdown_get_selected_str(ui_Dropdown2, buf, sizeof(buf)); logFile.print(buf);logFile.print(";"); 
    lv_dropdown_get_selected_str(ui_Dropdown1, buf, sizeof(buf)); logFile.print(buf);logFile.print(";"); 
    lv_dropdown_get_selected_str(ui_Dropdown3, buf, sizeof(buf)); logFile.print(buf);logFile.print(";"); 
    lv_dropdown_get_selected_str(ui_Dropdown4, buf, sizeof(buf)); logFile.print(buf);logFile.print(";"); 
    lv_dropdown_get_selected_str(ui_Dropdown5, buf, sizeof(buf)); logFile.print(buf);logFile.print(";"); 
    logFile.println(lv_obj_has_state(ui_FF, LV_STATE_CHECKED));
    // logFile.close();  
  }
  } // end if SDready

  status=3;
  watchgame();
}

void dohandshake() {
   
   // is HC12 433Mhz serial communication available?
   if (hc12.available()) {    
    Serial.println("at handshake, received HC12");
    // RGB colors for the LED
    colors[0]=25;colors[1]=0;colors[2]=0;

    // read the incoming message and out it into a byte 
    byte received = hc12.read();

    //  checks if the received byte got a 111 tail = very basic attag identification
    int check=bitRead(received,0)+bitRead(received,1)+bitRead(received,2);
    // get the playerid
    int playerid = (received >> 4);     
    // what is the player status?
    int playerstatus=bitRead(received,3);

    Serial.print("senderID:"); Serial.print(playerid);   Serial.print(" / "); Serial.println(playerid,BIN);
    Serial.print("received:"); Serial.print(received);   Serial.print(" / "); Serial.println(received,BIN);
    Serial.print("checked:");  Serial.println(check);

    // if check is 3, sum up the first 3 bits read from right
    // && status = 0 = blaster calling with "I am here"
    if (check==3 && playerstatus==0) { 

      lv_obj_has_state(ui_FF, LV_STATE_CHECKED);     

      // set the color of the display LED RGB
      colors[0]=25;colors[1]=25;colors[2]=25;
      color=yellow;

      // if the player already was at status 2 but started a new connection
      // in case someone switched off the blaster or it lost power somehow
      // decrease the number of players set to status 2 
      if (players[playerid]==2) {
        s2=s2-1;
      }

      // set the player status to 1,  unless it already was on 1
      // actually this is an unused variable
      if (players[playerid]!=1) {
       players[playerid]=1;
       s1=s1+1; 
      } 

      // once the first player asks for join broadcast message the game data
      // that way some of the players join straight with ready status
      // so less total messages are required      
      hc12.write(gd);
      hc12.write(gd2);  


    } else if (check==3 && playerstatus==1)  {
      // set the color of the display LED RGB
      colors[0]=0;colors[1]=25;colors[2]=0;
      color=green; 

      // if the player had previous status 1 then remove one from the counter
      if (players[playerid]==1) {
        s1=s1-1;
      }      

      // set the player status to 2, unless it already was on 2 
      if (players[playerid]!=2) {        
        players[playerid]=2;
        s2=s2+1; 
      }      
    } 


    char numplayerstxt[10];
    lv_dropdown_get_selected_str(ui_Dropdown1, numplayerstxt, sizeof(numplayerstxt));

    // calculate the status bar progress percentage and update it
    percent=(100/numplayers*s2);         
    lv_bar_set_value(ui_Bar1, percent, LV_ANIM_OFF);

    Serial.print(" Numplayers:");Serial.print(numplayers); 
    Serial.print(" S1:");Serial.print(s1); 
    Serial.print(" S2:");Serial.print(s2); 
    Serial.print(" Prozent:"); Serial.println(percent);

    // paint the player buttons yellow or green depending on status
    // the buttons don't yet have any other function besides showing the status
    // but maybe they can be used for a link to a data page or whatever in a future version
    switch(playerid) {
     case 1:  lv_obj_set_style_bg_color(ui_Button1,  color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 2:  lv_obj_set_style_bg_color(ui_Button2,  color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 3:  lv_obj_set_style_bg_color(ui_Button3,  color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 4:  lv_obj_set_style_bg_color(ui_Button4,  color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 5:  lv_obj_set_style_bg_color(ui_Button5,  color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 6:  lv_obj_set_style_bg_color(ui_Button6,  color, LV_PART_MAIN | LV_STATE_DEFAULT);break;        
     case 7:  lv_obj_set_style_bg_color(ui_Button7,  color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 8:  lv_obj_set_style_bg_color(ui_Button8,  color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 9:  lv_obj_set_style_bg_color(ui_Button9,  color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 10: lv_obj_set_style_bg_color(ui_Button10, color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 11: lv_obj_set_style_bg_color(ui_Button11, color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 12: lv_obj_set_style_bg_color(ui_Button12, color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 13: lv_obj_set_style_bg_color(ui_Button13, color, LV_PART_MAIN | LV_STATE_DEFAULT);break;            
     case 14: lv_obj_set_style_bg_color(ui_Button13, color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 15: lv_obj_set_style_bg_color(ui_Button15, color, LV_PART_MAIN | LV_STATE_DEFAULT);break;    
     case 16: lv_obj_set_style_bg_color(ui_Button16, color, LV_PART_MAIN | LV_STATE_DEFAULT);break;            
    }
   
    // done with collecting players? proceed to game launch
    if (s2==numplayers) {
      Serial.println("going to set status=2");
      colors[0]=0;colors[1]=75;colors[2]=0;
      status=2;
      startgame();
    }  
    
   }  

   
  
  // blink the LED
  if (currentMillis - previousMillis >= ledinterval) {
    previousMillis = currentMillis;  
    if (ledswitch == 0) {      
      smartdisplay_led_set_rgb(colors[0], colors[1], colors[2]);  
      colors[0]=25;colors[1]=0;colors[2]=0;
      ledswitch=1;
    } else {
      smartdisplay_led_set_rgb(0, 0, 0);  
      ledswitch=0;
    }    
  }  
}


// doing the handshake between blasters and server
void gotostatus1(lv_event_t *e) {
 
    char buf[32];
    // get the game mode from selectbox and print it on handhsake screen
    lv_dropdown_get_selected_str(ui_Dropdown2, buf, sizeof(buf));
    lv_textarea_set_text(ui_TextArea1, "Game mode: ");
    lv_textarea_add_text(ui_TextArea1, buf);
    
    // get the number of players from selectbox and print it on handhsake screen
    lv_dropdown_get_selected_str(ui_Dropdown1, buf, sizeof(buf));
    lv_textarea_add_text(ui_TextArea1, "\nNumber of players: ");
    lv_textarea_add_text(ui_TextArea1, buf);    
    // get the number of players and convert to int  
    numplayers=atoi(buf);

    // get the number of shots per mag from selectbox and print it on handhsake screen
    lv_dropdown_get_selected_str(ui_Dropdown3, buf, sizeof(buf));
    lv_textarea_add_text(ui_TextArea1, "\nShots per mag: ");
    lv_textarea_add_text(ui_TextArea1, buf);    

    // get the number of respawns from selectbox and print it on handhsake screen
    lv_dropdown_get_selected_str(ui_Dropdown4, buf, sizeof(buf));
    lv_textarea_add_text(ui_TextArea1, "\nRespawns: ");
    lv_textarea_add_text(ui_TextArea1, buf);        

    // get the battle time from selectbox and print it on handhsake screen
    lv_dropdown_get_selected_str(ui_Dropdown5, buf, sizeof(buf));
    lv_textarea_add_text(ui_TextArea1, "\nBattle time: ");
    lv_textarea_add_text(ui_TextArea1, buf); 
   
    int gd_gamemode=lv_dropdown_get_selected(ui_Dropdown1);  
    int gd_shots=lv_dropdown_get_selected(ui_Dropdown3);  
    int gd_respawns=lv_dropdown_get_selected(ui_Dropdown4);  
    int gd_time=lv_dropdown_get_selected(ui_Dropdown5);   

    gd=gd_gamemode << 6 | gd_shots << 4 | gd_respawns << 2 | gd_time;

    // generate a basic checksum for the gamedata
    int csum=gd_gamemode+gd_shots+gd_respawns+gd_time;

    gd2=lv_obj_has_state(ui_FF, LV_STATE_CHECKED) <<6 | csum;   

    Serial.print(lv_obj_has_state(ui_FF, LV_STATE_CHECKED));
    Serial.print(" all the game data, well almost all:");
    Serial.println(gd,BIN);
    Serial.print("checksumbyte:");
    Serial.println(gd2,BIN);


    status=1;
}


void setup()
{
    delay(250);
    Serial.begin(115200);
    hc12.begin(9600);
    // Serial.begin(9600);
    Serial.println("launching...");
    Serial.setDebugOutput(true);
    
   // check if a SD card is abailable 
   if (SD.begin(SD_CS))  {
    SDready=1;
   } 
    smartdisplay_init();
    auto disp = lv_disp_get_default();
    lv_disp_set_rotation(disp, LV_DISP_ROT_90);
    smartdisplay_lcd_set_brightness_cb(NULL,10000);
    ui_init();

    // hide the red SD card icon if SD card is available
    if (SDready==1) { 
      lv_obj_set_x(ui_Image5,320);
    } 
}

void loop()
{
  // Serial.println(SDready);
  // waiting for players calling doing the handshake
  switch (status) {
    case 1: dohandshake();  break;
    case 2: startgame();    break;
    case 3: watchgame();    break;
  }
  lv_timer_handler();

}