#include <OneWire.h>
#include <DallasTemperature.h>
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>

// ===== DS18B20 =====
#define ONE_WIRE_BUS 1
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

// ===== TFT =====
#define TFT_DC   35
#define TFT_CS   3
#define TFT_MOSI 37
#define TFT_CLK  36

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK);

// ===== Colors =====
#define BG        0x0841   // Dark gray (premium)
#define CARD      0x10A2   // Card background
#define ACCENT    ILI9341_CYAN
#define TEXT      ILI9341_WHITE
#define GOOD      ILI9341_GREEN
#define WARN      ILI9341_ORANGE
#define BAD       ILI9341_RED

void drawUI() {
  tft.fillScreen(BG);

  // ===== Header Bar =====
  tft.fillRect(0, 0, 320, 40, ACCENT);
  tft.setTextColor(ILI9341_BLACK);
  tft.setTextSize(2);
  tft.setCursor(10, 12);
  tft.print("TMIC Smart Monitor");

  // ===== Company =====
  tft.setTextColor(TEXT);
  tft.setTextSize(1);
  tft.setCursor(10, 50);
  tft.print("Trade Master International Co., Ltd.");
  tft.setCursor(10, 62);
  tft.print("Tel: 081 924 6556");
  tft.setCursor(10, 74);
  tft.print("[email protected]");

  // ===== Engineer =====
  tft.setCursor(10, 90);
  tft.print("A.Ryan Thatsuwan");

  // ===== Card (Temperature Box) =====
  tft.fillRoundRect(10, 110, 300, 110, 8, CARD);

  tft.setTextSize(2);
  tft.setTextColor(ACCENT);
  tft.setCursor(20, 120);
  tft.print("TEMPERATURE");

  // Divider
  tft.drawLine(20, 140, 290, 140, ILI9341_DARKGREY);
}

void updateTemp(float tempC) {

  // ===== Clear value area =====
  tft.fillRect(20, 150, 280, 50, CARD);

  // ===== Color Logic =====
  uint16_t color = GOOD;
  const char* status = "NORMAL";

  if (tempC > 60) {
    color = BAD;
    status = "HIGH";
  } else if (tempC > 30) {
    color = WARN;
    status = "WARNING";
  }

  // ===== Big Value =====
  tft.setTextColor(color);
  tft.setTextSize(5);
  tft.setCursor(30, 155);
  tft.print(tempC, 1);
  tft.print(" C");

  // ===== Status Badge =====
  tft.fillRoundRect(20, 210, 120, 25, 5, color);
  tft.setTextColor(ILI9341_BLACK);
  tft.setTextSize(2);
  tft.setCursor(25, 215);
  tft.print(status);

  // ===== Footer =====
  tft.setTextColor(TEXT);
  tft.setTextSize(1);
  tft.setCursor(180, 215);
  tft.print("IoT Ready");
}

void setup() {
  Serial.begin(115200);
  sensors.begin();

  tft.begin();

  // orientation (ของอาจารย์ fix แล้ว)
  tft.setRotation(1);
  uint8_t madctl = 0xC8;
  tft.sendCommand(ILI9341_MADCTL, &madctl, 1);

  drawUI();
}

void loop() {
  sensors.requestTemperatures();
  float tempC = sensors.getTempCByIndex(0);

  updateTemp(tempC);

  delay(1000);
}