#include <WiFi.h>
#include "ThingSpeak.h"

// WiFi + ThingSpeak
const char* ssid = "Wokwi-GUEST";
const char* password = "";
unsigned long myChannelNumber = 3050867;
const char* myWriteAPIKey = "EBUTJFMRKDP5DAQ8";
WiFiClient client;

// Global variables to hold last entered values
float temperature = 34, irradiance = 855, vdc = 403, idc = 5.4;
float vac = 228, iac = 7.9, soc = 82, efficiency = 0;

unsigned long lastUpdate = 0;
const unsigned long interval = 15000; // 15 sec

void setup() {
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);

  Serial.print("Connecting to WiFi");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500); Serial.print(".");
  }
  Serial.println("\nWiFi Connected!");
  Serial.println("Enter data in this format:");
  Serial.println("Temp Irr Vdc Idc Vac Iac Speed");
}

void loop() {
/*  if (Serial.available()) {
    String line = Serial.readStringUntil('\n');
    line.trim();

    float values[7];
    int index = 0;
    char *token;
    char buf[100];
    line.toCharArray(buf, sizeof(buf));
    token = strtok(buf, " ,\t");
    while (token != NULL && index < 7) {
      values[index++] = atof(token);
      token = strtok(NULL, " ,\t");
    }

    if (index == 7) {*/
     float values[7];
     
      temperature = values[0];
      irradiance  = values[1];
      vdc         = values[2];
      idc         = values[3];
      vac         = values[4];
      iac         = values[5];
      soc         = values[6];
      efficiency  = (vdc * idc > 0) ? (vac * iac) / (vdc * idc) * 100.0 : 0;

      Serial.println("✅ Values updated from Serial input.");
   /* } else {
      Serial.println("⚠️ Please enter 7 values correctly!");
    }
  }*/

  // Every 15 sec → print and send to ThingSpeak
  if (millis() - lastUpdate >= interval) {
    lastUpdate = millis();

    // Print values
    Serial.printf("T:%.2f IR:%.2f Vdc:%.2f Idc:%.2f Vac:%.2f Iac:%.2f Spd:%.2f Eff:%.2f%%\n",
                  temperature, irradiance, vdc, idc, vac, iac, soc, efficiency);

    // Send to ThingSpeak
    ThingSpeak.setField(1, temperature);
    ThingSpeak.setField(2, irradiance);
    ThingSpeak.setField(3, vdc);
    ThingSpeak.setField(4, idc);
    ThingSpeak.setField(5, vac);
    ThingSpeak.setField(6, iac);
    ThingSpeak.setField(7, efficiency);
    ThingSpeak.setField(8, soc);

    int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
    Serial.println((x == 200) ? "Update OK" : "Error " + String(x));
  }
}