#include <M5CoreS3.h>
#include <M5GFX.h>
#include <M5UNIT_NCIR2.h>
#include <M5Unified.h>
#include <Preferences.h>
#include <Wire.h>

// Objects
M5GFX display;
M5UNIT_NCIR2 ncir2;
Preferences preferences;

int16_t temperature;
int16_t temperature_soc;

uint16_t low_alarm_freq, high_alarm_freq, low_alarm_interval,
high_alarm_interval, buzz_freq;
uint8_t low_alarm_duty, high_alarm_duty, duty;
int16_t low_alarm_temp, high_alarm_temp;

// Global Variables
float emissivity = 0.95;
float tempAlert = 30.0;
int currentPage = 0;
bool needRedraw = true; // Flag to control screen redraw

#define M5UNIT_NCIR2_DEFAULT_ADDR 0x5A

void setup() {
auto cfg = M5.config();
M5.begin(cfg);
Serial.begin(115200); // Start serial communication
ncir2.begin(&Wire,1, 2, M5UNIT_NCIR2_DEFAULT_ADDR);

// Load settings from preferences
preferences.begin("settings", true);
emissivity = preferences.getFloat("emissivity", 0.95);
tempAlert = preferences.getFloat("tempAlert", 30.0);
preferences.end();

M5.Display.fillScreen(TFT_BLACK);
}

void loop() {
M5.update();

// Update the display only if necessary
if (needRedraw) {
if (currentPage == 0) {
drawMainMenu();
} else if (currentPage == 1) {
drawSettingsPage();
}
needRedraw = false; // Reset redraw flag
}

// Handle touch input
if (currentPage == 0) {
handleMainMenuTouch();
} else if (currentPage == 1) {
handleSettingsTouch();
}
}

// Main Menu
void drawMainMenu() {
M5.Display.fillScreen(TFT_BLACK);
M5.Display.setTextSize(2);
M5.Display.setCursor(10, 10);
M5.Display.print("NCIR2 Temp Monitor");

float temperature = ncir2.getTempValue(); // Now this line will work
Serial.printf("Temperature Read: %.2f C\n", temperature); // Debug print
M5.Display.setCursor(10, 50);
M5.Display.printf("Temp: %.2f C", temperature);

// Draw Settings button
M5.Display.fillRect(10, 100, 200, 50, TFT_BLUE);
M5.Display.setCursor(30, 120);
M5.Display.setTextColor(TFT_WHITE);
M5.Display.print("Settings");
}

void handleMainMenuTouch() {
auto detail = M5.Touch.getDetail();
if (detail.wasPressed()) {
int x = detail.x;
int y = detail.y;

// Check if "Settings" button is pressed
if (x >= 10 && x <= 210 && y >= 100 && y <= 150) {
  currentPage = 1;  // Navigate to Settings Page
  needRedraw = true; // Set redraw flag
}

}
}

void drawSettingsPage() {
M5.Display.fillScreen(TFT_BLACK);
M5.Display.setTextSize(2);
M5.Display.setCursor(10, 10);
M5.Display.print("Settings");

M5.Display.setCursor(10, 50);
M5.Display.printf("Emissivity: %.2f", emissivity);
M5.Display.setCursor(10, 80);
M5.Display.printf("Alert Temp: %.2f C", tempAlert);

// Draw adjustment buttons
M5.Display.fillRect(10, 120, 80, 50, TFT_GREEN);
M5.Display.setCursor(20, 140);
M5.Display.setTextColor(TFT_WHITE);
M5.Display.print("Emissivity +");

M5.Display.fillRect(100, 120, 80, 50, TFT_RED);
M5.Display.setCursor(110, 140);
M5.Display.setTextColor(TFT_WHITE);
M5.Display.print("Emissivity -");

M5.Display.fillRect(10, 180, 80, 50, TFT_GREEN);
M5.Display.setCursor(20, 200);
M5.Display.setTextColor(TFT_WHITE);
M5.Display.print("Temp +");

M5.Display.fillRect(100, 180, 80, 50, TFT_RED);
M5.Display.setCursor(110, 200);
M5.Display.setTextColor(TFT_WHITE);
M5.Display.print("Temp -");

// Draw "Back" button
M5.Display.fillRect(10, 250, 200, 50, TFT_BLUE);
M5.Display.setCursor(30, 270);
M5.Display.setTextColor(TFT_WHITE);
M5.Display.print("Back");
}

void handleSettingsTouch() {
auto detail = M5.Touch.getDetail();
if (detail.wasPressed()) {
int x = detail.x;
int y = detail.y;

// Check if "Back" button is pressed
if (x >= 10 && x <= 210 && y >= 250 && y <= 300) {
  currentPage = 0;  // Navigate back to Main Menu
  needRedraw = true; // Set redraw flag
  return;
}

// Check if "+" buttons are pressed to adjust values
if (x >= 10 && x <= 90 && y >= 120 && y <= 170) {
  emissivity += 0.01;  
  saveSettings();
  needRedraw = true; // Set redraw flag
}

if (x >= 100 && x <= 180 && y >= 120 && y <= 170) {
  emissivity -= 0.01;  
  saveSettings();
  needRedraw = true; // Set redraw flag
}

if (x >= 10 && x <= 90 && y >= 180 && y <= 230) {
  tempAlert += 1.0;  
  saveSettings();
  needRedraw = true; // Set redraw flag
}

if (x >= 100 && x <= 180 && y >= 180 && y <= 230) {
  tempAlert -= 1.0;  
  saveSettings();
  needRedraw = true; // Set redraw flag
}

}
}

void saveSettings() {
preferences.begin("settings", false);
preferences.putFloat("emissivity", emissivity);
preferences.putFloat("tempAlert", tempAlert);
preferences.end();
}