#include <WiFi.h>
#include <HTTPClient.h>
#include <WiFiClientSecure.h>
#include <Arduino_JSON.h>

// Include the libraries
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// Define the OLED parameters
#define SCREEN_WIDTH 128
#define SCREEN_HEIGTH 64
#define OLED_RESET -1
#define SCREEN_ADDRESS 0x3C

// Declare the objects
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGTH, &Wire, OLED_RESET);

const char* ssid = "Wokwi-GUEST";
const char* password = "";

//Your IP address or domain name with URL path
const char* serverName = "https://speech-development-tools.glitch.me/gpio/route?INFO=salutation";

// Update interval time set to 5 seconds
const long interval = 1000;
unsigned long previousMillis = 0;

String outputsState;

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

  if (! display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)){
    Serial.println(F("SSD1306 aclocation failed"));
    for(;;);
  }

  // Clear the Display
  display.display();
  delay(500);
  display.clearDisplay();

  display.setTextSize(2);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);
  display.println("OK");
  display.display();
  
  WiFi.begin(ssid, password);
  Serial.println("Connecting");
  while(WiFi.status() != WL_CONNECTED) { 
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP());
}

void loop() {
  unsigned long currentMillis = millis();
  
  if(currentMillis - previousMillis >= interval) {
     // Check WiFi connection status
    if(WiFi.status()== WL_CONNECTED ){ 
      outputsState = httpGETRequest(serverName);
      Serial.println(outputsState);
      JSONVar myObject = JSON.parse(outputsState);
  
      // JSON.typeof(jsonVar) can be used to get the type of the var
      if (JSON.typeof(myObject) == "undefined") {
        Serial.println("Parsing input failed!");
        return;
      }
    
      Serial.print("JSON object = ");
      Serial.println(myObject);
    
      // myObject.keys() can be used to get an array of all the keys in the object
      JSONVar keys = myObject.keys();
    
      for (int i = 0; i < keys.length(); i++) {
        JSONVar value = myObject[keys[i]];
        Serial.print("GPIO: ");
        Serial.print(keys[i]);
        Serial.print(" - SET to: ");
        Serial.println(value);
        pinMode(atoi(keys[i]), OUTPUT);
        digitalWrite(atoi(keys[i]), atoi(value));

        display.clearDisplay();
        display.setCursor(3,30);
        display.print(atoi(keys[i]));
        display.setCursor(22, 35);
        display.print('-');
        display.setCursor(30,30);
        display.println(atoi(value));
        display.display();
        Serial.print(atoi(keys[i]), atoi(value));
/*
        pinMode(2, OUTPUT);
        digitalWrite(2, 1);
        */
      }
      // save the last HTTP GET Request
      previousMillis = currentMillis;
    }
    else {
      Serial.println("WiFi Disconnected");
    }
  }
}

/*
HTTP Response code: 200
{"2":0}
JSON object = {"2":0}
GPIO: "2" - SET to: 0
2
*/

String httpGETRequest(const char* serverName) {
  WiFiClientSecure *client = new WiFiClientSecure;
  
  // set secure client without certificate
  client->setInsecure();
  HTTPClient https;
    
  // Your IP address with path or Domain name with URL path 
  https.begin(*client, serverName);
  
  // Send HTTP POST request
  int httpResponseCode = https.GET();
  
  String payload = "{}"; 
  
  if (httpResponseCode>0) {
    Serial.print("HTTP Response code: ");
    Serial.println(httpResponseCode);
    payload = https.getString();
  }
  else {
    Serial.print("Error code: ");
    Serial.println(httpResponseCode);
  }
  // Free resources
  https.end();

  return payload;
}