/*
Copyright (c):

Philipp Matthias Schäfer (philipp.matthias.schaefer@posteo.de), 2020

This file is part of the KrautStatus' Arduino code.

The Clean CommonMark library is free software: you can redistribute it and/or
modify it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.

The Clean CommonMark library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License
for more details.

You should have received a copy of the GNU Affero General Public License along
with the Clean CommonMark library. If not, see <https://www.gnu.org/licenses/>.
*/

#include <SPI.h>
#include <WiFi101.h>
#include <WiFiUdp.h>

#include "config.h"

uint8_t OPEN = 1;
uint8_t CLOSED = 0;

int wifi_status = WL_IDLE_STATUS;

WiFiUDP Udp;

void setup() {
  pinMode(REED_PIN, INPUT_PULLUP);

  Serial.begin(9600);
  while (!Serial);

  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("No WiFI shield present");
    // TODO: Create noShieldLoop with visual indication.
    while (true);
  }

  while (true) {
    // TODO: Visually indicate that we are trying to connect
    Serial.print("Connecting to SSID: ");
    Serial.println(SSID);
    status = WiFi.begin(SSID, PASSWORD);

    if (status == WL_CONNECTED) {
      break;
    }

    // TODO: Visually indicate that we waiting for trying to connect again
    delay(10000);
  }

  printNetworkInfo();

}

void loop() {
  int reed_state = digitalRead(REED_PIN);

  int packetSize = Udp.readPacket();
  if (packetSize) {
    Udp.beginPacket(udp.remoteIP(), Udp.remotePort());

    if (reed_state == HIGH) {
      Udp.write(CLOSED);
    } else {
      Udp.write(OPEN);
    }

    Udp.endPacket();
  }
  // TODO: Visually indicate open/closed state.
}


void printNetworkInfo() {

  Serial.print("Connect to WiFi");

  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);

  byte mac[6];
  WiFi.macAddress(mac);
  Serial.print("MAC address: ");
  for (int i = 5; i >= 0; --i) {
    if (mac[i] < 16) {
      Serial.print("0");
    }

    Serial.print(mac[i], HEX);

    if (i > 0) {
      Serial.print(":");
    }
  }
  Serial.println();

}