/*
  Inverter Stats Demo
  -------------------

  This demo shows how to display some example inverter stats on the TFT screen:
    - Battery State of Charge (SoC)
    - Power (W)
    - Action (e.g., "Charging", "Discharging")
    - Grid Power (W)

  It uses the TFT_eSPI library for the display and Adafruit_FT6206 for the
  capacitive touchscreen (though the touchscreen isn't actively used here for input).

  Connections & Libraries:
  - TFT_eSPI should be configured in your "User_Setup.h" (or the default TFT_eSPI config).
  - FT6206 uses hardware I2C.
  
  Note:
  - Replace the random-value placeholders with real data from your inverter system.
*/

#include <TFT_eSPI.h>       // TFT display library
#include <SPI.h>            // For the TFT display
#include <Wire.h>           // For FT6206 (capacitive touch)
#include <Adafruit_FT6206.h>

// Create the touchscreen object (hardware I2C SCL/SDA)
Adafruit_FT6206 ctp = Adafruit_FT6206();

// Create the display object (TFT_eSPI)
TFT_eSPI tft = TFT_eSPI(); // Default pins based on your setup in User_Setup.h

// Just for demonstration: dummy variables to store inverter stats
int batterySoC       = 0;      // Battery State of Charge (0-100%)
float inverterPower  = 0.0f;   // Current inverter power in Watts
String action        = "Idle"; // Could be "Charging", "Discharging", etc.
int gridPower        = 0;      // Grid Power in Watts

unsigned long lastUpdate = 0;  // Timer to update stats periodically
const unsigned long updateInterval = 2000; // 2-second update interval

// A small helper to randomly pick between two strings
String pickAction() {
  if (random(0, 2) == 0) {
    return "Charging";
  } else {
    return "Discharging";
  }
}

void setup() {
  Serial.begin(115200);
  Serial.println("Inverter Stats Demo");

  // Initialize the TFT display
  tft.init();
  tft.setRotation(1); // Adjust as needed for your screen orientation
  tft.fillScreen(TFT_BLACK);

  // Initialize the capacitive touchscreen (optional if you want to use touch)
  if (!ctp.begin(40)) {  
    Serial.println("Couldn't start FT6206 touchscreen controller.");
    // Not critical if we don't care about touch in this demo
  } else {
    Serial.println("Capacitive touchscreen started.");
  }

  // Draw a title bar or some header
  tft.setTextColor(TFT_WHITE, TFT_BLACK);
  tft.setTextSize(2);
  tft.setCursor(10, 10);
  tft.println("Inverter Stats");

  // Draw some static labels (just once)
  tft.setTextSize(2);
  tft.setCursor(10, 50);
  tft.print("Battery SoC: ");

  tft.setCursor(10, 80);
  tft.print("Inverter Pwr:");

  tft.setCursor(10, 110);
  tft.print("Action:      ");

  tft.setCursor(10, 140);
  tft.print("Grid Power:  ");

  // Seed random numbers (for demo)
  randomSeed(analogRead(0));
}

void loop() {
  // If you were using the touchscreen, you could check if (ctp.touched()) and handle input

  unsigned long currentMillis = millis();
  
  // Update the stats every 'updateInterval' milliseconds
  if (currentMillis - lastUpdate >= updateInterval) {
    lastUpdate = currentMillis;

    // Replace these with real data from your inverter
    batterySoC = random(0, 101);                // 0-100%
    inverterPower = random(0, 5001);            // 0-5000 W
    action = pickAction();                      // "Charging" or "Discharging"
    gridPower = random(0, 3001);                // 0-3000 W

    // Now update the display
    displayStats();
  }

  // Other code can go here
}

// Function to update stats on screen
void displayStats() {
  // We'll just overwrite old values by printing with background color = black
  
  // Battery SoC
  tft.setTextColor(TFT_WHITE, TFT_BLACK);
  tft.setTextSize(2);
  tft.setCursor(150, 50);
  tft.print("      ");       // Clear old data by printing some spaces
  tft.setCursor(150, 50);
  tft.printf("%3d%%", batterySoC);

  // Inverter Power
  tft.setCursor(150, 80);
  tft.print("      ");
  tft.setCursor(150, 80);
  tft.printf("%.0f W", inverterPower);

  // Action
  tft.setCursor(150, 110);
  tft.print("           ");
  tft.setCursor(150, 110);
  tft.print(action);

  // Grid Power
  tft.setCursor(150, 140);
  tft.print("       ");
  tft.setCursor(150, 140);
  tft.printf("%d W", gridPower);
}