#define IN_PIN 13
#define ON HIGH
#define OFF LOW
#define IGNORE_THRESHOLD 500
long starttime, duration;
int curr_status, prev_status;


#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <ESP8266HTTPClient.h>
ESP8266WiFiMulti WiFiMulti;

void setup() {
  WiFiMulti.addAP("munichmakerlab", "*********");

  Serial.begin(9600);
  pinMode(IN_PIN, INPUT);
  starttime = 0;
  prev_status = OFF;
}

void loop() {
  WiFiMulti.run();
  
  curr_status = digitalRead(IN_PIN);

  if (curr_status != prev_status) {
    if (curr_status == ON) {
      Serial.println("Start");
      starttime = millis();
    } else {
      duration = millis() - starttime;
      if (duration > IGNORE_THRESHOLD) {
        Serial.println("Stop");
        Serial.print("Duration [ms]: ");
        Serial.println(duration);
        Serial.print("Duration [s]: ");
        Serial.println(duration/1000);
        Serial.println();

        HTTPClient http;
        String t = String(duration/1000);
        http.begin("http://10.10.20.64/cgi-bin/data_laser.pl?duration=" + t);
        int httpCode = http.GET();

        // httpCode will be negative on error
        if(httpCode > 0) {
          // HTTP header has been send and Server response header has been handled
          Serial.printf("[HTTP] GET... code: %d\n", httpCode);

          // file found at server
          if(httpCode == HTTP_CODE_OK) {
              String payload = http.getString();
              Serial.println(payload);
          }
        } else {
          Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
        }

        http.end();
        Serial.println();

      }
    }
  }
  
  prev_status = curr_status;
}