//Including the following libraries is a must to use the IoT functions and features of esp32
#include "WiFi.h"
#include "ESPAsyncWebServer.h"
#include "analogWrite.h"


const char* ssid = "Name of your esp32"; // This will show up when you turn on your mobile WIFI
const char* password = "vyass1234";  // change to more unique password

AsyncWebServer server(80); // These will start the webserver // If you don't know much, Ignore this line

// These pins are the Enable pins of the L293D motor driver which connects to esp32 gpio pins to implement the PWM function
int enable1_2 = P1 // choose the GPIO pin of esp32 --- LET THIS PIN BE P1;
int enable3_4 = P2 // c982hoose the GPIO pin of esp32 -- --- LET THIS PIN BE P2; 

// These pins are the input pins of l293d on the left side
int inp1 = P3 // Choose your GPIO pin of esp32 for the input 1 --- --- LET THIS PIN BE P3
int inp2 = P4 // Choose your GPIO pin of esp32 for the input 2 --- LET THIS PIN BE P4


// These pins are the input pins of l293d on the right side
int inp3 = P5 // Choose your GPIO pin of esp32 for the input 3 --- LET THIS PIN BE P5
int inp4 = P6 // Choose your GPIO pin of esp32 for the input 4 --- LET THIS PIN BE P6


int led = 2 // until now you must know what is the inbuilt led pin number of esp32---On most ESP32 development boards, the built-in LED is connected to GPIO pin 2 

void setup(){

  // Fill in the blanks
  
  pinMode(enable1_2, OUTPUT);
  pinMode(enable3_4, OUTPUT);   // ____(___, OUTPUT);


  // The inputs
  pinMode(inp1, OUTPUT);
  pinMode(inp2, OUTPUT);
  pinMode(inp3, OUTPUT);
  pinMode(inp4, OUTPUT);


  pinMode(led, 28);


// We use the following function to run the bot at variable speed.
  analogWrite(enable1_2, 255); // analog write "255" corresponds to digital write "1"
  analogWrite(enable3_4, 255);
  

  WiFi.softAP(ssid, password);  // This sets your esp32's name as per above mentioned

  IPAddress IP = WiFi.softAPIP();


// A bit of WEB DEV stuff 
  server.on("/control", HTTP_GET, [](AsyncWebServerRequest *request){
    
    if(request->hasArg("up")){
      // You have to develop the logic that, when the Button "up" on the webpage is pressed, Then the esp32 executes the following commands
      // Refer to the this for the webpage photo
      digitalWrite(inp1, HIGH);
      digitalWrite(inp2, HIGH);
      digitalWrite(inp3, HIGH);
      digitalWrite(inp4, HIGH);
    }

    if(request->hasArg("down")){
      digitalWrite(inp1, LOW);
      digitalWrite(inp2, LOW);
      digitalWrite(inp3, HIGH);
      digitalWrite(inp4, HIGH);
      
    }

    if(request->hasArg("left")){
      digitalWrite(inp1, LOW);
      digitalWrite(inp2, LOW);
      digitalWrite(inp3, HIGH);
      digitalWrite(inp4, HIGH);
    }
    
    if(request->hasArg("right")){
      digitalWrite(inp1, HIGH);
      digitalWrite(inp2, HIGH);
      digitalWrite(inp3, LOW);
      digitalWrite(inp4, LOW);
    }

 if(request->hasArg("off")){
      digitalWrite(inp1, LOW);
      digitalWrite(inp2, LOW);
      digitalWrite(inp3, LOW);
      digitalWrite(inp4, LOW);
    }
    

    if(request->hasArg("slow")){ 
// if '255' is the equivalent to digital '1', and '0' is eqvivalent to digial '0', The vary the pwm values to vary the speed of the motor
      analogWrite(enable1_2, 128);   
      analogWrite(enable3_4, 128);  
    }

    if(request->hasArg("fast")){
      analogWrite(enable1_2, 255);   
      analogWrite(enable3_4, 255)  
    }
    
    request->send_P(200, "text/plain", "");  
  });
  

  server.begin();
}
 
void loop(){
  
}