//Programme OK

#include <Minitel1B_Hard.h>

#define MINITEL_PORT Serial2 //for ESP32
//#define MINITEL_PORT Serial1 //for Leonardo

#define DEBUG true
#define DEBUG_PORT Serial
 
#if DEBUG // Debug enabled
  #define debugBegin(x)     DEBUG_PORT.begin(x)
  #define debugPrint(x)     DEBUG_PORT.println(x)
  #define debugPrintHEX(x)  DEBUG_PORT.println(x,HEX)
  #define debugPrintBIN(x)  DEBUG_PORT.println(x,BIN)
#else // Debug disabled : Empty macro functions
  #define debugBegin(x)     
  #define debugPrint(x)     
  #define debugPrintHEX(x)  
  #define debugPrintBIN(x)  
#endif

// SOUND FX
#define SOUND 1 // score using bip
//#define SOUND2 1 // hit using modem connection

// SCREEN SIZE
#define WIDTH 40
#define HEIGHT 24

// GAME FIELD
#define X1 2 //player1 column
#define X2 40 //player2 column
#define XNET 21 //net column
#define SPACE 2 //score digit space
#define YSCORE 2 //score top row
#define WSCORE 2 //score width
#define HSCORE 4 //score height
#define XSCORE1 14 //player 1 score column - align right
#define XSCORE1_U XSCORE1-WSCORE+1 //unit digit
#define XSCORE1_T XSCORE1_U-WSCORE-SPACE //tenth digit
#define XSCORE2 26 //player 2 score column - align left
#define XSCORE2_T XSCORE2 // unit digit
#define XSCORE2_U XSCORE2+WSCORE+SPACE // tenth digit

// GAME PARAMETER
#define NBALL 15 //NB OF BALLS IN THE MATCH

// BALL DIRECTION
#define HAUT_DROITE 1
#define BAS_DROITE 2
#define BAS_GAUCHE 3
#define HAUT_GAUCHE 4

Minitel minitel(MINITEL_PORT);

int yP1 = 13; //player1 position
int yP2 = 13; //player2 position
int xBall = 0;
int yBall = 0;
int xBallOld = 0;
int yBallOld = 0;
int d = HAUT_DROITE; //ball direction
int p1 = 0; //player1 score
int p2 = 0; //player2 score
int startingCounter = 0;
int level = 2; //the smaller the quicker
int bypassCounter = 0; 
int hitCounter = 0; //nb hit
bool ping = true;

const byte digit[10][WSCORE*HSCORE] = { // digit de 0 à 9 sur 2 cellules par 4
  // les cellules sont décrites horizontalement de gauche a droite et de haut en bas
  {0b111110,0b111101,0b101010,0b010101,0b101010,0b010101,0b101111,0b011111}, //0
  {0b000000,0b010101,0b000000,0b010101,0b000000,0b010101,0b000000,0b010101}, //1
  {0b111100,0b111101,0b001111,0b011111,0b101010,0b000000,0b101111,0b001111}, //2
  {0b111100,0b111101,0b001111,0b011111,0b000000,0b010101,0b001111,0b011111}, //3
  {0b101010,0b010101,0b101111,0b011111,0b000000,0b010101,0b000000,0b010101}, //4
  {0b111110,0b111100,0b101111,0b001111,0b000000,0b010101,0b001111,0b011111}, //5
  {0b101010,0b000000,0b101111,0b001111,0b101010,0b010101,0b101111,0b011111}, //6
  {0b111100,0b111101,0b000000,0b010101,0b000000,0b010101,0b000000,0b010101}, //7
  {0b111110,0b111101,0b101111,0b011111,0b101010,0b010101,0b101111,0b011111}, //8
  {0b111110,0b111101,0b101111,0b011111,0b000000,0b010101,0b000000,0b010101} //9
};


// image of welcome page
// made from jpg using processing IDE
// +jpgtovdt2.pde (PAMAL) to get vdt from jpg
// +conversion_videotex_hex (Eserandour) to get hex from vdt
typedef unsigned char PROGMEM prog_uchar;

const int LONGUEUR_TRAME_IMAGE = 1650;
const prog_uchar IMAGE[] PROGMEM = 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//const int LONGUEUR_TRAME_IMAGE = 1666;
//const prog_uchar IMAGE[] PROGMEM = 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void setup() {

  debugBegin(115200);
  debugPrint("debug port ready");
  
  delay(500); // wait minitel to init
  
  //init minitel at 4800 bauds
  if (minitel.searchSpeed() != 4800) {     // search speed
    if (minitel.changeSpeed(4800) < 0) {   // set to 4800 if different
      minitel.searchSpeed();               // search speed again if change has failed
    }
  }

  minitel.modeVideotex();

  minitel.echo(false);

}

void loop() {
  welcome();
  startGame();
}

void welcome() {

  //draw welcome screen
  minitel.newScreen();
  minitel.attributs(CARACTERE_BLANC);
  minitel.attributs(FOND_NOIR); 
  for (int i=0; i<LONGUEUR_TRAME_IMAGE; i++) {
    minitel.writeByte(pgm_read_byte_near(IMAGE + i));
  }
  
  minitel.textMode();
  minitel.noCursor();
  minitel.attributs(CARACTERE_BLANC);
  minitel.attributs(DOUBLE_HAUTEUR);
  minitel.moveCursorXY(12,19);
  minitel.attributs(CLIGNOTEMENT);
  minitel.print("APPUYER SUR ENTREE");
  
  minitel.attributs(CARACTERE_BLEU);
  minitel.attributs(GRANDEUR_NORMALE);
  minitel.attributs(FIXE);
  minitel.moveCursorXY(1,23);
  //   40 char   ----------**********----------**********
  minitel.print("PLAYER 1                        PLAYER 2");
  minitel.print("UP:Q DOWN:W                  UP:J DOWN:N");

  //flush any input
  while(MINITEL_PORT.available()) {
    byte b = MINITEL_PORT.read();
    debugPrint(b);
  }
  //wait touch is pressed
  while(getKeyCodeOverride() != 141) {
    delay(10);
  }
  
  //clean up
  minitel.newScreen();
  minitel.attributs(FIXE);
  minitel.graphicMode();

}

void startGame() {
  
  //draw game field
  drawGameField();
  debugPrint("game field done");
  //init game parameters
  initGame();
  debugPrint("init game done");
  //start
  while (p1+p2 < NBALL) {
    playGame();
  }
  minitel.attributs(CLIGNOTEMENT);
  if (p1>p2) drawScore1(p1);
  else drawScore2(p2);
#ifdef SOUND
  minitel.bip();
  delay(1000);
  minitel.bip();
  delay(1000);
  minitel.bip();
  delay(1000);
#else delay(5000);
#endif
#ifdef SOUND2
  if (!ping) ping = pingpong(ping);
#endif

  p1 = 0;
  p2 = 0;
  yP1 = 13;
  yP2 = 13;
  xBall = 0;
  yBall = 0;
  ping = true;
  
}

void handlePlayer() {

  int dy1 = 0;
  int dy2 = 0;
  
  byte key = getKeyCodeOverride();

  if (key == 215 && yP1<22) dy1++;
  if (key == 209 && yP1>3) dy1--;
  if (key == 78 && yP2<22) dy2++;
  if (key == 202 && yP2>3) dy2--;
  
  minitel.graphic(0b111111, X1, yP1+3*dy1);
  minitel.moveCursorXY(X1, yP1-2*dy1);
  if (dy1!=0) minitel.graphic(0b000000);
  else minitel.graphic(0b111111); //preserve frame rate
  yP1+=dy1;

  minitel.graphic(0b111111, X2, yP2+3*dy2);
  minitel.moveCursorXY(40, yP2-2*dy2);
  if (dy2!=0) minitel.graphic(0b000000);
  else minitel.graphic(0b111111); //preserve frame rate
  yP2+=dy2;
  
}

void playGame() {

  handlePlayer();

  if (startingCounter > 0) {
    countdown();
  }
  else {
    //updateLevel
    if (hitCounter == 3) level=1;
    if (hitCounter == 6) level=0;
    if (bypassCounter < level) {
      //bypass frame to slow down
      bypassCounter++;
    }
    else {
      bypassCounter=0;     
      
      xBallOld = xBall;
      yBallOld = yBall;

      // move ball   
      if(d == HAUT_DROITE){
        xBall+=2;
        yBall--;
      }
      if(d == BAS_DROITE){
        xBall+=2;
        yBall++;
      }
      if(d == BAS_GAUCHE){
        xBall-=2;
        yBall++;
      }
      if(d == HAUT_GAUCHE){
        xBall-=2;
        yBall--;
      }

      //erase old ball
      eraseBall(xBallOld, yBallOld);
      //draw new ball
      minitel.graphic(0b111111, xBall, yBall);      

      // top limit
      if(yBall == 1) {
        if(d == HAUT_DROITE) d = BAS_DROITE;
        if(d == HAUT_GAUCHE) d = BAS_GAUCHE;
      }

      // bottom limit
      if(yBall  == HEIGHT) {
        if (d == BAS_GAUCHE) d = HAUT_GAUCHE;
        if (d == BAS_DROITE) d = HAUT_DROITE;
      }

      // player1 side
      if (xBall <= X1 + 2) {
        // player1 send back
        if(abs(yBall-yP1) < 3) {
          if(d == BAS_GAUCHE) d = BAS_DROITE;
          if(d == HAUT_GAUCHE) d = HAUT_DROITE;
          hitCounter++;
          #ifdef SOUND2
          ping = pingpong(ping);
          #endif
        }
        else{ // player2 win
#ifdef SOUND
          minitel.bip();
#endif
          p2++;
          drawScore2(p2);
          initGame();
        }
      }

      // player2 side
      if (xBall >= X2 - 2) {
        // player2 send back
        if(abs(yBall-yP2) < 3) {
          if(d == BAS_DROITE) d = BAS_GAUCHE;
          if(d == HAUT_DROITE) d = HAUT_GAUCHE;
          hitCounter++;
          #ifdef SOUND2
          ping = pingpong(ping);
          #endif
        }
        else{ // player1 win
#ifdef SOUND
          minitel.bip();
#endif
          p1++;
          drawScore1(p1);
          initGame();
        }
      }
    }
  }
}

bool pingpong(bool ping) {
  if (ping) {
    minitel.connexion(true);
    return false;
  }
  else {
    minitel.connexion(false);
    return true;
  }
}

void eraseBall(int x, int y) {
  // erase ball preserving game field and score

  minitel.moveCursorXY(x,y);

  bool erase = true;

  if (x == XNET) { // Ball in net
    if (y%2 == 1) erase = false;
  }

  
  
  if (y >= YSCORE && y < YSCORE + HSCORE) { // Ball in score
    if (x >= XSCORE1_T && x < XSCORE1_T + WSCORE) { //ball in score1 tenth
      if (p1 >= 10) {
        drawDigit(p1/10, XSCORE1_T, YSCORE);
        erase = false;
      }
    }
    if (x >= XSCORE1_U && x < XSCORE1_U + WSCORE) { //ball in score1 unit
      drawDigit(p1%10, XSCORE1_U, YSCORE);
      erase = false;
    }
    if (x >= XSCORE2_T && x < XSCORE2_T + WSCORE) { //ball in score2 tenth
      if (p2 >= 10) {
        drawDigit(p2/10, XSCORE2_T, YSCORE);
        erase = false;
      }
    }
    if (x >= XSCORE2_U && x < XSCORE2_U + WSCORE) { //ball in score2 unit
      drawDigit(p2%10, XSCORE2_U, YSCORE);
      erase = false;
    }
  }
  if (erase) minitel.graphic(0b000000);
}

/*void drawDigit(int num, int x, int y) {
  for (int i = 0; i < WSCORE; i++) {
    for (int j = 0; j < HSCORE; j++) {
      minitel.graphic(digit[num][i+WSCORE*j],x+i,y+j);
    }
  }
}*/

void initGame() {
  // init level
  hitCounter = 0;
  level = 2;
  bypassCounter = 2;
  // get random starting point
  xBallOld = xBall;
  yBallOld = yBall;
  d = random(1,4);
  xBall = random(1,5)*2+1;
  if (d>2) xBall = 40-xBall;
  yBall = random(3,22);
  // draw new ball
  minitel.graphic(0b111111, xBall, yBall);
  // starting countdown 
  startingCounter = 10; 
}

void countdown() {
  if (xBallOld != 0) {
    if (startingCounter == 8) {
      minitel.attributs(CARACTERE_BLEU);
      minitel.graphic(0b111111, xBallOld, yBallOld);
      minitel.attributs(CARACTERE_BLANC);
    }
    if (startingCounter == 6) {
      minitel.attributs(CARACTERE_VERT);
      minitel.graphic(0b111111, xBallOld, yBallOld);
      minitel.attributs(CARACTERE_BLANC);
    }
    if (startingCounter == 4) {
      minitel.attributs(CARACTERE_BLEU);
      minitel.graphic(0b111111, xBallOld, yBallOld);
      minitel.attributs(CARACTERE_BLANC);
    }
    if (startingCounter == 2) {
      minitel.attributs(CARACTERE_VERT);
      minitel.graphic(0b111111, xBallOld, yBallOld);
      minitel.attributs(CARACTERE_BLANC);
    }
    if (startingCounter == 1) {
      minitel.graphic(0b000000, xBallOld, yBallOld); //erase ball
      #ifdef SOUND2
        ping = pingpong(ping);
      #endif
    }
  }
  startingCounter--;
}


byte getKeyCodeOverride() {
  byte b = 255;
  if (MINITEL_PORT.available()) {
    b = MINITEL_PORT.read();
    MINITEL_PORT.flush();   
    debugPrint(b);
  }
  return b;
}

void drawGameField() {
  //draw net
  for (int i = 1; i < HEIGHT; i+=2) {
    minitel.graphic(0b111111, 21, i);
  }
  //draw players
  for (int i = -2; i < 3; i++) {
    minitel.graphic(0b111111,X1,yP1+i);
    minitel.graphic(0b111111,X2,yP2+i);
  }
  // draw score
  drawScore1(p1);
  drawScore2(p2);
  
}

void drawScore1(int score) {
  drawDigit(score%10, XSCORE1_U, YSCORE);
  if (score>=10) drawDigit(score/10, XSCORE1_T, YSCORE);
}

void drawScore2(int score) {
  drawDigit(score%10, XSCORE2_U, YSCORE);
  if (score>=10) drawDigit(score/10, XSCORE2_T, YSCORE);
}

void drawDigit(int num, int x, int y) {
  for (int i = 0; i < WSCORE; i++) {
    for (int j = 0; j < HSCORE; j++) {
      minitel.graphic(digit[num][i+WSCORE*j],x+i,y+j);
    }
  }
}