#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <SPI.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include "driver/adc.h"


// --- Brochage (adapter si besoin) ---
#define TFT_CS   5
#define TFT_DC   2
#define TFT_RST  4   // Peut être -1 si RST cablé au 3V3
#define LINES 320
#define COLUMNS 240

bool **cells;
bool **nextCells;
uint32_t generation;


Adafruit_ILI9341 tft(TFT_CS, TFT_DC, TFT_RST);

void setup() {
  // Init écran
  tft.begin();                 // auto-detect ILI9341
  tft.setRotation(0);          // 0 = portrait
  tft.fillScreen(ILI9341_BLACK);

  // // Carré contour (100x100) en vert
  // uint16_t x = 20, y = 20, side = 100;
  // tft.drawRect(x, y, side, side, ILI9341_GREEN);

  // // Carré rempli (80x80) en bleu
  // tft.fillRect(140, 40, 80, 80, ILI9341_BLUE);

  Serial.begin(115200);

  initRandomSeed(42);

  createTab(&cells, LINES, COLUMNS);
  createTab(&nextCells, LINES, COLUMNS);

  fillTabRand(cells, LINES, COLUMNS);
  drawCurrent();
}

void loop() {
  // rien
}

void createTab(bool ***tab, int lines, int columns) {
  *tab = (bool **)malloc(sizeof(bool*) * lines);
  for (int i = 0; i < lines; i++) {
    (*tab)[i] = (bool *)malloc(sizeof(bool) * columns);
  }
}

void fillTabRand(bool **tab, int lines, int columns) {
  for (int i = 0; i < lines; i++) {
    for (int j = 0; j < columns; j++) {
      tab[i][j] = getRandBool();
    }
  }
}

bool getRandBool() {
  return rand() % 5 == 1;
}

void initRandomSeed(uint16_t preSeed) {
  adc1_config_width(ADC_WIDTH_BIT_12);
  adc1_config_channel_atten(ADC1_CHANNEL_7, ADC_ATTEN_DB_11); // GPIO 35

  uint32_t entropy = 0;
  for (int i = 0; i < 32; i++) {
    entropy <<= 1;
    entropy |= adc1_get_raw(ADC1_CHANNEL_7) & 1; // Prend le bit LSB
    safeDelay(5);
  }

  uint32_t t = (uint32_t)time(NULL);
  uint32_t seed = entropy ^ t ^ preSeed;
  srand(seed);

  Serial.printf("Seed initialisé : ADC=%u, time=%lu, final=%u\n", entropy, t, seed);
}

void drawCurrent() {
    for (int i = 0; i < LINES; i++) {
    for (int j = 0; j < COLUMNS; j++) {
      tft.writePixel(j, i, cells[i][j] ? ILI9341_GREEN : ILI9341_BLACK);
      Serial.printf("Cell [%d,%d] : %s\n", i, j, cells[i][j] ? "true" : "false");
    }
  }
}

void safeDelay(int ms)
{
  for (int i = 0; i < ms; i++) {
    delay(1);
  }
}