/*****************************************************
   WOKWI GUARANTEED WORKING CONFIG
   ESP32 + ILI9341 CAP TOUCH
*****************************************************/

// ===== FORCE TFT CONFIG (DO NOT USE User_Setup.h) =====
#define USER_SETUP_LOADED

#define ILI9341_DRIVER

#define TFT_MOSI 23
#define TFT_MISO 19
#define TFT_SCLK 18
#define TFT_CS   15
#define TFT_DC   2
#define TFT_RST  4

// Stable for Wokwi
#define SPI_FREQUENCY 20000000
#define SPI_READ_FREQUENCY 20000000
#define SPI_TOUCH_FREQUENCY 2500000

#define LOAD_GLCD
#define LOAD_FONT2
#define LOAD_FONT4
#define LOAD_GFXFF
// =======================================================

#include <SPI.h>
#include <TFT_eSPI.h>
#include <Adafruit_FT6206.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <WiFi.h>

// -------- Pins --------
#define PIN_PH   32
#define PIN_TEMP 27
#define PIN_VOLT 34
#define PIN_CURR 35
#define PIN_LDR  33

TFT_eSPI tft = TFT_eSPI();
Adafruit_FT6206 ctp = Adafruit_FT6206();
OneWire oneWire(PIN_TEMP);
DallasTemperature sensors(&oneWire);

bool systemState = true;
bool redraw = true;

// ======================================================
void setup() {
  Serial.begin(115200);
  delay(1000);

  tft.init();
  tft.setRotation(1);
  tft.fillScreen(TFT_BLACK);

  if (!ctp.begin(40)) {
    Serial.println("Touch failed");
  }

  sensors.begin();
  WiFi.begin("Wokwi-GUEST", "");
}

// ======================================================
void loop() {

  handleTouch();

  if (systemState) {
    drawActive();
  } else {
    drawStandby();
  }

  delay(200);
}

// ======================================================
void handleTouch() {

  if (ctp.touched()) {
    TS_Point p = ctp.getPoint();

    int x = p.x;
    int y = p.y;

    if (x > 240 && y < 50) {
      systemState = !systemState;
      redraw = true;
      delay(300);
    }
  }
}

// ======================================================
void drawActive() {

  if (redraw) {
    tft.fillScreen(TFT_BLACK);
    redraw = false;
  }

  sensors.requestTemperatures();

  float tempF = (sensors.getTempCByIndex(0) * 9.0 / 5.0) + 32.0;
  float ph   = (analogRead(PIN_PH)   / 4095.0) * 14.0;
  float volt = (analogRead(PIN_VOLT) / 4095.0) * 15.0;
  float curr = (analogRead(PIN_CURR) / 4095.0) * 5.0;
  int light  = map(analogRead(PIN_LDR), 0, 4095, 0, 100);

  // ON Button
  tft.fillRect(250, 5, 65, 35, TFT_GREEN);
  tft.setTextColor(TFT_BLACK, TFT_GREEN);
  tft.drawCentreString("ON", 282, 12, 2);

  tft.setTextColor(TFT_GOLD, TFT_BLACK);
  tft.drawString("GENERATOR", 10, 10, 2);

  tft.setTextColor(TFT_WHITE, TFT_BLACK);
  tft.setCursor(10, 35);
  tft.printf("V: %.1f V  I: %.1f A   ", volt, curr);

  tft.drawFastHLine(0, 80, 320, TFT_DARKGREY);

  tft.setTextColor(TFT_CYAN, TFT_BLACK);
  tft.drawString("OCEAN SENSORS", 10, 90, 2);

  tft.setTextSize(3);
  tft.setTextColor(TFT_WHITE, TFT_BLACK);
  tft.setCursor(10, 115);
  tft.printf("pH: %.1f   ", ph);

  tft.setTextSize(2);
  tft.setCursor(160, 120);
  tft.printf("%.0f F   ", tempF);

  tft.setCursor(10, 170);
  tft.setTextColor(TFT_ORANGE, TFT_BLACK);
  tft.printf("SUNLIGHT: %d%%   ", light);

  tft.setTextSize(1);
  tft.setCursor(10, 220);
  tft.setTextColor(TFT_BLUE, TFT_BLACK);
  tft.print("IP: ");
  tft.print(WiFi.localIP());
}

// ======================================================
void drawStandby() {

  if (redraw) {
    tft.fillScreen(TFT_BLACK);
    redraw = false;
  }

  tft.setTextColor(TFT_WHITE, TFT_BLACK);
  tft.drawCentreString("STANDBY MODE", 160, 90, 4);
  tft.drawCentreString("Tap Top Right to Wake", 160, 140, 2);

  tft.fillRect(250, 5, 65, 35, TFT_RED);
  tft.setTextColor(TFT_WHITE, TFT_RED);
  tft.drawCentreString("OFF", 282, 12, 2);
}