/* New with JSON */
#include <ESP8266WiFi.h>          //https://github.com/esp8266/Arduino
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h>
#include <Wire.h>
#include "Adafruit_MCP23017.h"
Adafruit_MCP23017 mcp;

#define S0 D0   /* Assign Multiplexer pin S0 connect to pin D0 of NodeMCU */
#define S3 D3   /* Assign Multiplexer pin S3 connect to pin D3 of NodeMCU */
#define S1 D7   /* Assign Multiplexer pin S1 connect to pin D1 of NodeMCU */
#define S2 D8   /* Assign Multiplexer pin S2 connect to pin D2 of NodeMCU */
#define SIG A0  /* Assign SIG pin Analog output for all Multiplexer's channels to A0 of NodeMCU */
#define SoilHumidity 430 /* Assign the level of the soil humidity to irrigate the plant */

#define PUMP D6
#define solenoid0 0   //Connect Solenoid0 for Sens0 GPA0 on mcp
#define solenoid1 1   //Connect Solenoid1 for Sens1 GPA1 on mcp
#define solenoid2 2   //Connect Solenoid2 for Sens2 GPA2 on mcp
#define solenoid3 3   //Connect Solenoid3 for Sens3 GPA3 on mcp
#define solenoid4 4   //Connect Solenoid4 for Sens4 GPA4 on mcp 
#define solenoid5 5   //Connect Solenoid5 for Sens5 GPA5 on mcp
#define solenoid6 6   //Connect Solenoid6 for Sens6 GPA6 on mcp 
#define solenoid7 7   //Connect Solenoid7 for Sens7 GPB0 on mcp
#define solenoid8 8   //Connect Solenoid8 for Sens8 GPB1 on mcp
#define solenoid9 9   //Connect Solenoid9 for Sens9 GPB2 on mcp
#define solenoid10 10 //Connect Solenoid10 for Sens10 GPB3 on mcp
#define solenoid11 11 //Connect Solenoid11 for Sens11 GPB4 on mcp
#define solenoid12 12 //Connect Solenoid11 for Sens11 GPB5 on mcp
#define solenoid13 13 //Connect Solenoid11 for Sens11 GPB6 on mcp
#define solenoid14 14 //Connect Solenoid11 for Sens11 GPB7 on mcp
#define solenoid15 15 //Connect Solenoid11 for Sens11 GPB8 on mcp

// int sensors[15];
int sensor0;    /* Assign the name "sensor0" as analog output value from Channel C0 */
int sensor1;    /* Assign the name "sensor1" as analog output value from Channel C1 */
int sensor2;    /* Assign the name "sensor2" as analog output value from Channel C2 */
int sensor3;    /* Assign the name "sensor3" as analog output value from Channel C3 */
int sensor4;    /* Assign the name "sensor4" as analog output value from Channel C4 */
int sensor5;    /* Assign the name "sensor5" as analog output value from Channel C5 */
int sensor6;    /* Assign the name "sensor6" as analog output value from Channel C6 */
int sensor7;    /* Assign the name "sensor7" as analog output value from Channel C7 */
int sensor8;    /* Assign the name "sensor8" as analog output value from Channel C8 */
int sensor9;    /* Assign the name "sensor9" as analog output value from Channel C9 */
int sensor10;   /* Assign the name "sensor10" as analog output value from Channel C10 */
int sensor11;   /* Assign the name "sensor11" as analog output value from Channel C11 */
int sensor12;   /* Assign the name "sensor12" as analog output value from Channel C12 */
int sensor13;   /* Assign the name "sensor13" as analog output value from Channel C13 */
int sensor14;   /* Assign the name "sensor14" as analog output value from Channel C14 */
int sensor15;   /* Assign the name "sensor15" as analog output value from Channel C15 */

// int SoilHumidity = 525;
String pumpstate = "OFF";
String solenoidState0 = "OFF";
String solenoidState1 = "OFF";
String solenoidState2 = "OFF";
String solenoidState3 = "OFF";
String solenoidState4 = "OFF";
String solenoidState5 = "OFF";
String solenoidState6 = "OFF";
String solenoidState7 = "OFF";
String solenoidState8 = "OFF";
String solenoidState9 = "OFF";
String solenoidState10 = "OFF";
String solenoidState11 = "OFF";
String solenoidState12 = "OFF";
String solenoidState13 = "OFF";
String solenoidState14 = "OFF";
String solenoidState15 = "OFF";

ESP8266WebServer server(80);

static const char PROGMEM INDEX_HTML[] = R"rawliteral(
<!DOCTYPE html>
<html>
 <head>
 <meta name="viewport" content=meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"/>
 <title>DHT Monitor</title>
 <style type="text/css">
  body{
      padding: 35px;
      background-color: #222222;
     }
  h1{
     color: #FFFFFF;
     font-family: sans-serif;
    }
  p{ 
    color: #FFFFFF;
    font-family: sans-serif;
    font-size: 18px;
    }
span{
    padding-left: 80px;
}
  </style>
 </head>
 <body>
 <h1>Irrigation System Viewer</h1>
 <p id="pumpState"></p>
 <p id="t0"><span id="s0"></span></p>
 <p id="t1"><span id="s0"></span></p>
 <p id="t2"><span id="s2"></span></p>
 <p id="t3"><span id="s3"></span></p>
 <p id="t4"><span id="s4"></span></p>
 <body>
 <script type="text/javascript">
   refresh(); 
   setInterval(refresh, 1000);
   function refresh(){
     refreshSoilHumidity();
     refreshSolenoid();
     refreshPump();
   }
   
   function refreshSoilHumidity(){
     var xmlhttp = new XMLHttpRequest();
     xmlhttp.onreadystatechange = function() {
       if (xmlhttp.readyState == XMLHttpRequest.DONE && xmlhttp.status == 200){
        const parsedData = JSON.parse(xmlhttp.responseText);
        document.getElementById("t0").innerHTML = "SoilHumidity Sensor 0: " + parsedData.t0 + "%";
        document.getElementById("t1").innerHTML = "SoilHumidity Sensor 1: " + parsedData.t1 + "%";
        document.getElementById("t2").innerHTML = "SoilHumidity Sensor 2: " + parsedData.t2 + "%";
        document.getElementById("t3").innerHTML = "SoilHumidity Sensor 3: " + parsedData.t3 + "%";
        document.getElementById("t4").innerHTML = "SoilHumidity Sensor 4: " + parsedData.t4 + "%";
       }
     };
     xmlhttp.open("GET", "/SoilHumidity", true);
     xmlhttp.send();
   }

   function refreshSolenoid(){
     var xmlhttp = new XMLHttpRequest();
     xmlhttp.onreadystatechange = function() {
       if (xmlhttp.readyState == XMLHttpRequest.DONE && xmlhttp.status == 200){
        const parsedData = JSON.parse(xmlhttp.responseText);
        document.getElementById("s0").innerHTML = "Solenoid0 State 0: " + parsedData.s0;
        document.getElementById("s1").innerHTML = "Solenoid1 State 1: " + parsedData.s1;
        document.getElementById("s2").innerHTML = "Solenoid2 State 2: " + parsedData.s2;
        document.getElementById("s3").innerHTML = "Solenoid3 State 3: " + parsedData.s3;
        document.getElementById("s4").innerHTML = "Solenoid4 State 4: " + parsedData.s4;
       }
     };
     xmlhttp.open("GET", "/Solenoid", true);
     xmlhttp.send();
   }
   
   function refreshPump(){
     var xmlhttp = new XMLHttpRequest();
     xmlhttp.onreadystatechange = function() {
       if (xmlhttp.readyState == XMLHttpRequest.DONE && xmlhttp.status == 200){
        document.getElementById("pumpState").innerHTML = "Pump State: " + this.responseText;
       }
     };
     xmlhttp.open("GET", "/pump", true);
     xmlhttp.send();
    }
 </script>
</html>
)rawliteral";

void handleRoot(){
  server.send_P(200, "text/html", INDEX_HTML);
}

void handleNotFound() {
  String message = "File Not Found\n\n";
  message += "URI: ";
  message += server.uri();
  message += "\nMethod: ";
  message += (server.method() == HTTP_GET) ? "GET" : "POST";
  message += "\nArguments: ";
  message += server.args();
  message += "\n";
  for (uint8_t i = 0; i < server.args(); i++) {
    message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
  }
  server.send(404, "text/plain", message);
}

// read soil humiduty and display in html
void getSoilHumidity() {
  // Channel 0 (C0 pin - binary output 0,0,0,0)
  digitalWrite(S0,LOW); digitalWrite(S1,LOW); digitalWrite(S2,LOW); digitalWrite(S3,LOW);
  sensor0 = analogRead(SIG);
  
  // Channel 1 (C1 pin - binary output 1,0,0,0)
  digitalWrite(S0,HIGH); digitalWrite(S1,LOW); digitalWrite(S2,LOW); digitalWrite(S3,LOW);
  sensor1 = analogRead(SIG);
  
  // Channel 2 (C2 pin - binary output 0,1,0,0)
  digitalWrite(S0,LOW); digitalWrite(S1,HIGH); digitalWrite(S2,LOW); digitalWrite(S3,LOW);
  sensor2 = analogRead(SIG);
  
  // Channel 3 (C3 pin - binary output 1,1,0,0)
  digitalWrite(S0,HIGH); digitalWrite(S1,HIGH); digitalWrite(S2,LOW); digitalWrite(S3,LOW);
  sensor3 = analogRead(SIG);
  
  // Channel 4 (C4 pin - binary output 0,0,1,0)
  digitalWrite(S0,LOW); digitalWrite(S1,LOW); digitalWrite(S2,HIGH); digitalWrite(S3,LOW);
  sensor4 = analogRead(SIG);
  
  // Channel 5 (C5 pin - binary output 1,0,1,0)
  digitalWrite(S0,HIGH); digitalWrite(S1,LOW); digitalWrite(S2,HIGH); digitalWrite(S3,LOW);
  sensor5 = analogRead(SIG);

  // Channel 6 (C6 pin - binary output 0,1,1,0)
  digitalWrite(S0,LOW); digitalWrite(S1,HIGH); digitalWrite(S2,HIGH); digitalWrite(S3,LOW);
  sensor6 = analogRead(SIG);

  // Channel 7 (C7 pin - binary output 1,1,1,0)
  digitalWrite(S0,HIGH); digitalWrite(S1,HIGH); digitalWrite(S2,HIGH); digitalWrite(S3,LOW);
  sensor7 = analogRead(SIG);

  // Channel 8 (C8 pin - binary output 0,0,0,1)
  digitalWrite(S0,LOW); digitalWrite(S1,LOW); digitalWrite(S2,LOW); digitalWrite(S3,HIGH);
  sensor8 = analogRead(SIG);

  // Channel 9 (C9 pin - binary output 1,0,0,1)
  digitalWrite(S0,HIGH); digitalWrite(S1,LOW); digitalWrite(S2,LOW); digitalWrite(S3,HIGH);
  sensor9 = analogRead(SIG);

  // Channel 10 (C10 pin - binary output 0,1,0,1)
  digitalWrite(S0,LOW); digitalWrite(S1,HIGH); digitalWrite(S2,LOW); digitalWrite(S3,HIGH);
  sensor10 = analogRead(SIG);

  // Channel 11 (C11 pin - binary output 1,1,0,1)
  digitalWrite(S0,HIGH); digitalWrite(S1,HIGH); digitalWrite(S2,LOW); digitalWrite(S3,HIGH);
  sensor11 = analogRead(SIG);

  // Channel 12 (C12 pin - binary output 0,0,1,1)
  digitalWrite(S0,LOW); digitalWrite(S1,LOW); digitalWrite(S2,HIGH); digitalWrite(S3,HIGH);
  sensor12 = analogRead(SIG);

  // Channel 13 (C13 pin - binary output 1,0,1,1)
  digitalWrite(S0,HIGH); digitalWrite(S1,LOW); digitalWrite(S2,HIGH); digitalWrite(S3,HIGH);
  sensor13 = analogRead(SIG);

  // Channel 14 (C14 pin - binary output 0,1,1,1)
  digitalWrite(S0,LOW); digitalWrite(S1,HIGH); digitalWrite(S2,HIGH); digitalWrite(S3,HIGH);
  sensor14 = analogRead(SIG);

  // Channel 15 (C15 pin - binary output 1,1,1,1)
  digitalWrite(S0,HIGH); digitalWrite(S1,HIGH); digitalWrite(S2,HIGH); digitalWrite(S3,HIGH);
  sensor15 = analogRead(SIG);
  
  sensor1 = 532;
  sensor2 = 345;
  sensor3 = 555;
  sensor4 = 269;
  // Serial.println(sensor0);
  String json = "{\"t0\":" + String(sensor0) + ",\"t1\":" + String(sensor1)+ ",\"t2\":" + String(sensor2)+ ",\"t3\":" + String(sensor3)+ ",\"t4\":" + String(sensor4)+ "}";
  server.send (200, "application/json", json);
}

// Read Solenoid status and display status in html
void driveSolenoid() {
  solenoidState0 = solneoidStatus(sensor0, solenoid0);
  solenoidState1 = solneoidStatus(sensor1, solenoid1);
  solenoidState2 = solneoidStatus(sensor2, solenoid2);
  solenoidState3 = solneoidStatus(sensor3, solenoid3);
  solenoidState4 = solneoidStatus(sensor4, solenoid4);
  solenoidState5 = solneoidStatus(sensor5, solenoid5);
  solenoidState6 = solneoidStatus(sensor6, solenoid6);
  solenoidState7 = solneoidStatus(sensor7, solenoid7);
  solenoidState8 = solneoidStatus(sensor8, solenoid8);
  solenoidState9 = solneoidStatus(sensor9, solenoid9);
  solenoidState12 = solneoidStatus(sensor10, solenoid10);
  solenoidState11 = solneoidStatus(sensor11, solenoid11);
  solenoidState12 = solneoidStatus(sensor12, solenoid12);
  solenoidState13 = solneoidStatus(sensor13, solenoid13);
  solenoidState14 = solneoidStatus(sensor14, solenoid14);
  solenoidState15 = solneoidStatus(sensor15, solenoid15);
  String json1 = "{\"s0\":" + String(solenoidState0) + ",\"s1\":" + String(solenoidState1)+ ",\"s2\":" + String(solenoidState2)+ ",\"s3\":" + String(solenoidState3)+ ",\"s4\":" + String(solenoidState4)+ "}";
  server.send (200, "application/json", json1);
}

// Drive the Solenoid
String solneoidStatus(int sensor, int solenoidPin) {
  String solenoidState;
  if(sensor <= SoilHumidity) {
    solenoidState = "OFF";
    mcp.digitalWrite(solenoidPin,LOW);
  }
  else {
  solenoidState = "ON";
  mcp.digitalWrite(solenoidPin,HIGH);
  }
  return(solenoidState);
}

// Drive the pump and display status in html
void drivePump() {
  if(solenoidState0 == "OFF" && solenoidState1 == "OFF" && solenoidState2 == "OFF" && solenoidState3 == "OFF" && 
     solenoidState4 == "OFF" && solenoidState5 == "OFF" && solenoidState6 == "OFF" && solenoidState7 == "OFF" && 
     solenoidState8 == "OFF" && solenoidState9 == "OFF" && solenoidState10 == "OFF" && solenoidState11 == "OFF" && 
     solenoidState12 == "OFF" && solenoidState13 == "OFF" && solenoidState14 == "OFF" && solenoidState15 == "OFF") {
    if(pumpstate == "ON") {
      pumpstate = "OFF";
      digitalWrite(PUMP,LOW);
    }
  }
  else {
    if(pumpstate == "OFF") {
    pumpstate = "ON";
    digitalWrite(PUMP,HIGH);
    }
  }
  server.send(200, "text/plain", pumpstate);
}

void setup() {
  Serial.begin(115200);
  mcp.begin();
  pinMode(S0,OUTPUT);   /* Define digital pin as output to the Multiplexer pin SO */
  pinMode(S1,OUTPUT);   /* Define digital pin as output to the Multiplexer pin S1 */
  pinMode(S2,OUTPUT);   /* Define digital pin as output to the Multiplexer pin S2 */
  pinMode(S3,OUTPUT);   /* Define digital pin as output to the Multiplexer pin S3 */
  pinMode(SIG, INPUT);  /* Define analog pin as input from the Multiplexer pin SIG */
  pinMode(PUMP,OUTPUT); /* Define digital pin os output to control pump */
  mcp.pinMode(solenoid0, OUTPUT);
  mcp.pinMode(solenoid1, OUTPUT);
  mcp.pinMode(solenoid2, OUTPUT);
  mcp.pinMode(solenoid3, OUTPUT);
  mcp.pinMode(solenoid4, OUTPUT);
  mcp.pinMode(solenoid5, OUTPUT);
  mcp.pinMode(solenoid6, OUTPUT);
  mcp.pinMode(solenoid7, OUTPUT);
  mcp.pinMode(solenoid8, OUTPUT);
  mcp.pinMode(solenoid9, OUTPUT);
  mcp.pinMode(solenoid10, OUTPUT);
  mcp.pinMode(solenoid11, OUTPUT);
  mcp.pinMode(solenoid12, OUTPUT);
  mcp.pinMode(solenoid13, OUTPUT);
  mcp.pinMode(solenoid14, OUTPUT);
  mcp.pinMode(solenoid15, OUTPUT);
  digitalWrite(PUMP,LOW);
  mcp.digitalWrite(solenoid0,LOW);
  mcp.digitalWrite(solenoid1,LOW);
  mcp.digitalWrite(solenoid2,LOW);
  mcp.digitalWrite(solenoid3,LOW);
  mcp.digitalWrite(solenoid4,LOW);
  mcp.digitalWrite(solenoid5,LOW);
  mcp.digitalWrite(solenoid6,LOW);
  mcp.digitalWrite(solenoid7,LOW);
  mcp.digitalWrite(solenoid8,LOW);
  mcp.digitalWrite(solenoid9,LOW);
  mcp.digitalWrite(solenoid10,LOW);
  mcp.digitalWrite(solenoid11,LOW);
  mcp.digitalWrite(solenoid12,LOW);
  mcp.digitalWrite(solenoid13,LOW);
  mcp.digitalWrite(solenoid14,LOW);
  mcp.digitalWrite(solenoid15,LOW);
  WiFiManager wifiManager;
  wifiManager.autoConnect("AutoConnectAP");
  Serial.println("Yourconnected...yeey :)");

  server.on("/", handleRoot);
  server.on("/SoilHumidity", HTTP_GET, getSoilHumidity);
  server.on("/Solenoid", HTTP_GET, driveSolenoid);
  server.on("/pump", HTTP_GET, drivePump);
  server.onNotFound(handleNotFound);   /* page not found */

  server.begin();
  Serial.println("HTTP server started");
  Serial.println(WiFi.localIP());
}

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