#include "U8g2lib.h"

#define SCL_PIN A5
#define SDA_PIN A4
#define BUTTON_UP_PIN 12
#define BUTTON_DOWN_PIN 4
#define BUTTON_SELECT_PIN 8
#define BUTTON_ERASE_PIN 10 // Nouveau bouton pour effacer ou valider

U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, U8X8_PIN_NONE, SCL_PIN, SDA_PIN);

int button_up_clicked = 0;
int button_select_clicked = 0;
int button_down_clicked = 0;
int button_erase_clicked = 0; // Variable pour le bouton ERASE
unsigned long erase_button_press_time = 0; // Temps de début de l'appui sur ERASE

int selected = 0;
String letter_selected = "";
bool word_finalized = false; // Indique si le mot est finalisé
static const int TOTAL_MENU = 27;
const char *options[TOTAL_MENU] = {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "_"};

void setup() {
  pinMode(BUTTON_UP_PIN, INPUT_PULLUP);
  pinMode(BUTTON_DOWN_PIN, INPUT_PULLUP);
  pinMode(BUTTON_SELECT_PIN, INPUT_PULLUP);
  pinMode(BUTTON_ERASE_PIN, INPUT_PULLUP); // Initialisation du bouton ERASE
  u8g2.begin();
  Serial.begin(9600); // Initialisation pour afficher les résultats sur le moniteur série
}

void loop() {
  if (!word_finalized) {
    // Mode de saisie (clavier et mot en cours)
    u8g2.clearBuffer();
    u8g2.setFont(u8g2_font_6x13B_tf);

    // Affichage des options du menu
    for (int i = 0; i < TOTAL_MENU; i++) {
      if (i == selected) {
        // Affichage de l'option sélectionnée en surbrillance
        u8g2.setFontMode(0); 
        u8g2.setDrawColor(0);
        
        if ((digitalRead(BUTTON_SELECT_PIN) == LOW) && (button_select_clicked == 0)) {
          button_select_clicked = 1;
          letter_selected += options[i]; // Ajout de la lettre sélectionnée
          Serial.println(letter_selected);
        }
      } else {
        // Affichage des options non sélectionnées
        u8g2.setFontMode(1);
        u8g2.setDrawColor(1);
      }

      // Placement des caractères sur 3 lignes
      int sel_x = ((i % 9) * 12) + 4; // Calcul de la position horizontale
      int sel_y = 36 + ((i / 9) * 12); // Calcul de la ligne (36, 48, 60)
      u8g2.setCursor(sel_x, sel_y);
      u8g2.print(options[i]);
    }

    // Affichage de la chaîne sélectionnée
    u8g2.setFontMode(0);
    u8g2.setDrawColor(1);
    u8g2.setCursor(4, 18);
    u8g2.print(letter_selected);

    u8g2.sendBuffer();

    // Gestion des boutons
    if ((digitalRead(BUTTON_UP_PIN) == HIGH) && (button_up_clicked == 1)) button_up_clicked = 0;
    if ((digitalRead(BUTTON_DOWN_PIN) == HIGH) && (button_down_clicked == 1)) button_down_clicked = 0;
    if ((digitalRead(BUTTON_SELECT_PIN) == HIGH) && (button_select_clicked == 1)) button_select_clicked = 0;

    if ((digitalRead(BUTTON_DOWN_PIN) == LOW) && (button_down_clicked == 0)) {
      button_down_clicked = 1;
      selected = (selected + 1) % TOTAL_MENU; // Boucle à 0 si on dépasse le dernier élément
      delay(200);
    }

    if ((digitalRead(BUTTON_UP_PIN) == LOW) && (button_up_clicked == 0)) {
      button_up_clicked = 1;
      selected = (selected - 1 + TOTAL_MENU) % TOTAL_MENU; // Boucle au dernier élément si on descend en dessous de 0
      delay(200);
    }

    // Effacer la dernière lettre sélectionnée
    if ((digitalRead(BUTTON_ERASE_PIN) == LOW) && (button_erase_clicked == 0)) {
      button_erase_clicked = 1;
      erase_button_press_time = millis(); // Enregistre le temps d'appui
    } else if ((digitalRead(BUTTON_ERASE_PIN) == HIGH) && (button_erase_clicked == 1)) {
      button_erase_clicked = 0;
      if (millis() - erase_button_press_time < 2000) { // Efface la dernière lettre si appui court
        if (letter_selected.length() > 0) {
          letter_selected.remove(letter_selected.length() - 1);
          Serial.println(letter_selected);
        }
      } else { // Valide le mot si appui long
        word_finalized = true;
      }
    }
  } else {
    // Mode affichage du mot finalisé
    u8g2.clearBuffer();
    u8g2.setFont(u8g2_font_fur35_tf); // Police plus grande pour afficher le mot
    u8g2.setCursor(4, 48); // Centré pour l'écran 128x64
    u8g2.print(letter_selected);
    u8g2.sendBuffer();

    // Réinitialisation sur appui du bouton ERASE
    if ((digitalRead(BUTTON_ERASE_PIN) == LOW) && (button_erase_clicked == 0)) {
      button_erase_clicked = 1;
    } else if ((digitalRead(BUTTON_ERASE_PIN) == HIGH) && (button_erase_clicked == 1)) {
      button_erase_clicked = 0;
      word_finalized = false; // Réinitialise le mot
      letter_selected = ""; // Vide la chaîne
      selected = 0; // Réinitialise la sélection
    }
  }
}


/*
#include "U8g2lib.h"
#define SCL_PIN A5
#define SDA_PIN A4
#define BUTTON_UP_PIN 12
#define BUTTON_DOWN_PIN 4
#define BUTTON_SELECT_PIN 8

U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, U8X8_PIN_NONE, SCL_PIN, SDA_PIN);


int button_up_clicked = 0;
int button_select_clicked = 0;
int button_down_clicked = 0;

int selected = 0;
String letter_selected = "";
int letter_selected_length = 0;
static const int TOTAL_MENU = 27;
const char *options[TOTAL_MENU] = {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "_"};
void setup() {
  pinMode(BUTTON_UP_PIN, INPUT_PULLUP);
  pinMode(BUTTON_DOWN_PIN, INPUT_PULLUP);
  pinMode(BUTTON_SELECT_PIN, INPUT_PULLUP);
  u8g2.begin();
}

void loop() {
  u8g2.clearBuffer();
  u8g2.setFont(u8g2_font_6x13B_tf);
  for (int i = 0; i < TOTAL_MENU; i++) {
    if (i == selected) {
      u8g2.setFontMode(0);
      u8g2.setDrawColor(0);
      if ((digitalRead(BUTTON_SELECT_PIN) == LOW) && (button_select_clicked == 0)) {
        button_select_clicked = 1;
        letter_selected = letter_selected + options[i];
        letter_selected_length++;
        //  Serial.println(i);
        Serial.println(letter_selected);

      }
    } else if (i != selected) {
      u8g2.setFontMode(1);
      u8g2.setDrawColor(1);
    }
    if (i < 9) {
      int sel = (i * 12) + 4;
      u8g2.setCursor((sel), 36);
    }
    else if (i > 8 && i < 18) {
      int sel = ((i - 9) * 12) + 4;
      u8g2.setCursor((sel), 48);
    }
    else if (i > 17 && i < 27) {
      int sel = ((i - 18) * 12) + 4;
      u8g2.setCursor((sel), 60);
    }
    u8g2.print(options[i]);
    // Serial.println(sel);
    u8g2.setFontMode(0);
    u8g2.setDrawColor(0);
    u8g2.setCursor(4, 18);
    u8g2.print(letter_selected);



  }
  u8g2.sendBuffer();

  // start Unclick
  if ((digitalRead(BUTTON_UP_PIN) == HIGH) && (button_up_clicked == 1)) {
    button_up_clicked = 0;
  }
  if ((digitalRead(BUTTON_DOWN_PIN) == HIGH) && (button_down_clicked == 1)) {
    button_down_clicked = 0;
  }
  if ((digitalRead(BUTTON_SELECT_PIN) == HIGH) && (button_select_clicked == 1)) {
    button_select_clicked = 0;
  }
  // end Unclick

  if ((digitalRead(BUTTON_DOWN_PIN) == LOW) && (button_down_clicked == 0)) {
    button_down_clicked = 1;
    selected = selected + 1;
    // Serial.println(selected);
    delay(200);
  };
  if ((digitalRead(BUTTON_UP_PIN) == LOW) && (button_up_clicked == 0)) {
    button_up_clicked = 1;
    selected = selected - 1;
    // Serial.println(selected);
    delay(200);
  };
}
*/