#include <WiFi.h>
#include <WebServer.h>
#include <AutoConnect.h>
#include <WiFiClientSecure.h>
#include <ArduinoJson.h>
#include <HardwareSerial.h>
#include <NeoPixelBus.h>

// PETSCAN 
//
// VER 1.5
//
// Designed to send pet chip data to an HTTPS (secure site)
// Change all locations in sketch that have your website URL
// Enter your site's Certificate as needed.

WebServer Server;
AutoConnect Portal(Server);

const char* myserver = "www.yoursite.com";  // Remote Server URL
const char* wifi = "no";
#define NEOPIX 19 // Neopixel Pin
#define VIBRATE 21 // Haptic Motor Pin
#define ONBOARD_LED 2
byte Myarray[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
String datarx; //Received data as string

NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(2, NEOPIX);
HardwareSerial MySerial(1);

// Certificate from HTTPS website where chip data will be sent.
const char* test_root_ca= \
"-----BEGIN CERTIFICATE-----\n" \
"MIIDSjCCAjKgAwIBAgIQRK+wgNajJ7qJMDmGLvhAazANBgkqhkiG9w0BAQUFADA/\n" \
"DkRTVCBSb290IENBIFgzMB4XDTAwMDkzMDIxMTIxOVoXDTIxMDkzMDE0MDExNVow\n" \
"PzEkMCIGA1UEChMbRGlnaXRhbCBTaWduYXR1cmUgVHJ1c3QgQ28uMRcwFQYDVQQD\n" \
"AN+v6ZdQCINXtMxiZfaQguzH0yxrMMpb7NnDfcdAwRgUi+DoM3ZJKuM/IUmTrE4O\n" \
"rz5Iy2Xu/NMhD2XSKtkyj4zl93ewEnu1lcCJo6m67XMuegwGMoOifooUMM0RoOEq\n" \
"OLl5CjH9UL2AZd+3UWODyOKIYepLYYHsUmu5ouJLGiifSKOeDNoJjj4XLh7dIN9b\n" \
"xiqKqy69cK3FCxolkHRyxXtqqzTWMIn/5WgTe1QLyNau7Fqckh49ZLOMxt+/yUFw\n" \
"aeQQmxkqtilX4+U9m5/wAl0CAwEAAaNCMEAwDwYDVR0TAQH/BAUwAwEB/zAOBgNV\n" \
"HQ8BAf8EBAMCAQYwHQYDVR0OBBYEFMSnsaR7LHH62+FLkHX/xBVghYkQMA0GCSqG\n" \
"SIb3DQEBBQUAA4IBAQCjGiybFwBcqR7uKGY3Or+Dxz9LwwmglSBd49lZRNI+DT69\n" \
"AvHRAosZy5Q6XkjEGB5YGV8eAlrwDPGxrancWYaLbumR9YbK+rlmM6pZW87ipxZz\n" \
"R8srzJmwN0jP41ZL9c8PDHIyh8bwRLtTcm1D9SZImlJnt1ir/md2cXjbDaJWFBM5\n" \
"Ob8VZRzI9neWagqNdwvYkQsEjgfbKbYK7p2CNTUQ\n" \
"-----END CERTIFICATE-----\n";

// You can use x.509 client certificates if you want
//const char* test_client_key = "";   //to verify the client
//const char* test_client_cert = "";  //to verify the client

WiFiClientSecure client;

void rootPage() {
// If at any time, a browser on the same LAN accesses the IP for the ESP32,
// it will run this function and display HTML served from this ESP32.
  char content[] = "Hello, This is a webpage served from the ESP32";
  Server.send(200, "text/plain", content);
}
void setup() {
// This resets all the neopixels to an off state
  strip.Begin();
  strip.Show();   
  delay(1000);

  Serial.begin(115200);
  Serial.println();
  Server.on("/", rootPage);
      strip.SetPixelColor(0, RgbColor(15, 0, 0));
      strip.Show();
      delay(200); 
  if (Portal.begin()) {
   Serial.println("HTTP server:" + WiFi.localIP().toString());
   wifi = "yes";
  }
  MySerial.begin(9600, SERIAL_8N1, 16, 17); // Setup Serial for the Chip Reader Board
  pinMode(ONBOARD_LED, OUTPUT); // Set the output for on the onboard LED (if used).
  pinMode(VIBRATE, OUTPUT); // Set the output for the Haptic Vibration Motor.
}

void loop() {
  Portal.handleClient();

if(wifi == "yes"){
    strip.SetPixelColor(0, RgbColor(0, 0, 15));
    strip.Show();
    delay(200); 
}
else{
    strip.SetPixelColor(0, RgbColor(15, 0, 0));
    strip.Show();
    delay(200); 
}

  int flag = 0;
  int count = 0;
  String hexx = "";
 // This "while" section will execute if a Pet Chip is scanned and responds with serial data.
  while (MySerial.available() > 0) {
    strip.SetPixelColor(1, RgbColor(60, 60, 60));
    strip.Show();
    delay(50); 
    byte byteFromSerial = MySerial.read();
    if (byteFromSerial < 0x10) {
      hexx = hexx + "0";
    }
    hexx = hexx + String(byteFromSerial, HEX);
    hexx = hexx + ".";
    Myarray[count] = byteFromSerial;
    count++;
    flag = 1;
      if(count < 6){
      digitalWrite(VIBRATE, HIGH);
      }
      else{
      digitalWrite(VIBRATE, LOW); 
      }
  }

  if (flag == 1) {
  // Scan was successful, so process the information and send it to the remote API for database processing.
    strip.SetPixelColor(1, RgbColor(60, 30, 0));
    strip.Show();
    delay(100); 
    digitalWrite(VIBRATE, LOW);
    unsigned long manuf = (Myarray[4] << 8) | Myarray[5];
    unsigned long id = (Myarray[6] << 32) | (Myarray[7] << 24) | (Myarray[8] << 16) | (Myarray[9] << 8) | Myarray[10];
    String brand = String(manuf);
    String idx = String(id);

    String build = "https://www.yoursite.com/petchip/?api_key=tU84-s8ns-l9Rh-70js-HH75-Rt27&hex=" + hexx + "&brand=" + brand + "&id=" + idx;
    // JSON build (if you wish to use that instead of a URL GET)
    // String build = "{\"api_key\": \"tU84-s8ns-l9Rh-70js-HH75-Rt27\", \"hex\": \"" + hexx + "\", \"brand\": \"" + brand + "\", \"id\": \"" + idx + "\"}";

    Serial.println(build);
    Serial.println("   ");
  client.setCACert(test_root_ca);
  //client.setCertificate(test_client_key); // for client verification
  //client.setPrivateKey(test_client_cert);  // for client verification

  // Checking connection to server...
  if (!client.connect(myserver, 443)){
    Serial.println("Connection failed!");
    strip.SetPixelColor(1, RgbColor(20, 0, 0)); // RED
    strip.Show();
    delay(100); 
    digitalWrite(VIBRATE, LOW);
  }
  else {
    // Make a HTTPS request (In this case, using GET instead of JSON) ...
    client.println("GET " + build + " HTTP/1.1");
    client.println("Host: www.yoursite.com");
    client.println("Connection: close");
    client.println();

     while (client.connected()) {
      String line = client.readStringUntil('\n');
      if (line == "\r") {
        Serial.println("data received");
        break;
      }
    }

  while (client.available()) {
    datarx += client.readStringUntil('\n');
  }
    // Process Status returned from website
      // IV = Invalid Key
      // VS = Verified (previous id) and Saved.
      // NS = New id and Saved.
        if(datarx == "IV"){
          strip.SetPixelColor(1, RgbColor(20, 0, 0));  // RED
          strip.Show();
          delay(100); 
        }
        if(datarx == "VS"){
          strip.SetPixelColor(1, RgbColor(0, 20, 0));  // GREEN
          strip.Show();
          delay(100); 
        }
        if(datarx == "NS"){
          strip.SetPixelColor(1, RgbColor(20, 0, 20));  // PURPLE
          strip.Show();
          delay(100); 
        }
    datarx = "";                      
    client.stop();
    
  } // connected to server
    delay(3000);
    strip.SetPixelColor(1, RgbColor(0, 0, 0));
    strip.Show();
    delay(100); 
  } // if flag=1 (tag was scanned)

  digitalWrite(VIBRATE, LOW);
}