// A lot of the code is from Rui Santos at http://randomnerdtutorials.com 


// Load Wi-Fi library
#include <WiFi.h>

// Replace with your network credentials
const char* ssid = "Galaxy A51C39D";
const char* password = "utgs0750";

// Set web server port number to 80
WiFiServer server(80);

// Variable to store the HTTP request
String header;

// Auxiliar variables to store the current output state
String led1State = "off";
String led2State = "off";
String led3State = "off";

// Assign output variables to GPIO pins
const int led1 = D0;
const int led2 = D1;
const int led3 = D2;

const int button1 = D10;
const int button2 = D9;
const int button3 = D8;

// Current time
unsigned long currentTime = millis();
// Previous time
unsigned long previousTime = 0; 
// Define timeout time in milliseconds (example: 2000ms = 2s)
const long timeoutTime = 2000;

void setup() {
  Serial.begin(115200);
  // Initialize the output variables as outputs
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  // Set outputs to LOW
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);

  // Initialize buttns
  pinMode(button1, INPUT_PULLUP);
  pinMode(button2, INPUT_PULLUP);
  pinMode(button3, INPUT_PULLUP);

  // Connect to Wi-Fi network with SSID and password
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  // Print local IP address and start web server
  Serial.println("");
  Serial.println("WiFi connected.");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  server.begin();
}

void loop(){
  WiFiClient client = server.available();   // Listen for incoming clients

  if (client) {                             // If a new client connects,
    currentTime = millis();
    previousTime = currentTime;
    Serial.println("New Client.");          // print a message out in the serial port
    String currentLine = "";                // make a String to hold incoming data from the client
    while (client.connected() && currentTime - previousTime <= timeoutTime) {  // loop while the client's connected
      currentTime = millis();
      if (client.available()) {             // if there's bytes to read from the client,
        char c = client.read();             // read a byte, then
        Serial.write(c);                    // print it out the serial monitor
        header += c;
        if (c == '\n') {                    // if the byte is a newline character
          // if the current line is blank, you got two newline characters in a row.
          // that's the end of the client HTTP request, so send a response:
          if (currentLine.length() == 0) {
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            // and a content-type so the client knows what's coming, then a blank line:
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println("Connection: close");
            client.println();
            
            // turns the GPIOs on and off
            if (header.indexOf("GET /led1/on") >= 0) {
              Serial.println("LED 1 on");
              led1State = "on";
              digitalWrite(led1, HIGH);
            } else if (header.indexOf("GET /led1/off") >= 0) {
              Serial.println("LED 1 off");
              led1State = "off";
              digitalWrite(led1, LOW);
            } if (header.indexOf("GET /led2/on") >= 0) {
              Serial.println("LED 2 on");
              led2State = "on";
              digitalWrite(led2, HIGH);
            } else if (header.indexOf("GET /led2/off") >= 0) {
              Serial.println("LED 2 off");
              led2State = "off";
              digitalWrite(led2, LOW);
            } if (header.indexOf("GET /led3/on") >= 0) {
              Serial.println("LED 3 on");
              led3State = "on";
              digitalWrite(led3, HIGH);
            } else if (header.indexOf("GET /led3/off") >= 0) {
              Serial.println("LED 3 off");
              led3State = "off";
              digitalWrite(led3, LOW);
            }
            
            // Display the HTML web page
            client.println("<!DOCTYPE html><html>");
            client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
            client.println("<link rel=\"icon\" href=\"data:,\">");
            // CSS to style the on/off buttons 
            // Bootstrap css
            client.println("<link href=\"https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css\" rel=\"stylesheet\" integrity=\"sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN\" crossorigin=\"anonymous\">");
            
            // Web Page Heading
            client.println("<body><h1 class=\"text-center\" > Ana's Lights </h1>");
            //client.println("<canvas id=\"myCanvas\" width=\"800\" height=\"800\"></canvas>");
            //client.println(script_code);
            
            // Display current state, and ON/OFF buttons for LED 1  
            client.println("<p class=\"text-center\">LED 1 - State " + led1State + "</p>");
            // If the output26State is off, it displays the ON button       
            if (led1State=="off") {
              client.println("<p class=\"text-center\"><a href=\"/led1/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p class=\"text-center\"><a href=\"/led1/off\"><button class=\"button button2\">OFF</button></a></p>");
            } 
               
            // Display current state, and ON/OFF buttons for LED 2  
            client.println("<p class=\"text-center\">LED 2 - State " + led2State + "</p>");
            // If the output26State is off, it displays the ON button       
            if (led2State=="off") {
              client.println("<p class=\"text-center\"><a href=\"/led2/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p class=\"text-center\"><a href=\"/led2/off\"><button class=\"button button2\">OFF</button></a></p>");
            } 

            // Display current state, and ON/OFF buttons for LED 3  
            client.println("<p class=\"text-center\">LED 3 - State " + led3State + "</p>");
            // If the output26State is off, it displays the ON button       
            if (led3State=="off") {
              client.println("<p class=\"text-center\"><a href=\"/led3/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p class=\"text-center\"><a href=\"/led3/off\"><button class=\"button button2\">OFF</button></a></p>");
            } 

            client.println("</body></html>");
            
            // The HTTP response ends with another blank line
            client.println();
            // Break out of the while loop
            break;
          } else { // if you got a newline, then clear currentLine
            currentLine = "";
          }
        } else if (c != '\r') {  // if you got anything else but a carriage return character,
          currentLine += c;      // add it to the end of the currentLine
        }
      }
    }
    // Clear the header variable
    header = "";
    // Close the connection
    client.stop();
    Serial.println("Client disconnected.");
    Serial.println("");
  }
}