load('api_config.js');
load('api_events.js');
load('api_gpio.js');
load('api_http.js');
load('api_net.js');
load('api_sys.js');
load('api_timer.js');
load('api_esp32.js');
load('api_dht.js');
load('api_adc.js');
load('api_rpc.js');
load('api_mqtt.js');

let esp_sleep_enable_ext0_wakeup = ffi("void esp_sleep_enable_ext0_wakeup(int, int)"); // (GpioPin, 0=LOW, 1=HIGH)

// Pins
let resetPin = 0;
let statusLightPin = 16;
let dhtPin = 22;
let moisturePin = 32;

// Turn on status led
GPIO.set_mode(statusLightPin, GPIO.MODE_OUTPUT);
GPIO.write(statusLightPin, 0);

// Reset Handler
GPIO.set_mode(resetPin, GPIO.MODE_INPUT);
GPIO.set_int_handler(resetPin, GPIO.INT_EDGE_NEG, function(resetPin) {
  print('Pin', resetPin, 'got interrupt');
  for (let i=0; i<=5; i++)
  {
    GPIO.toggle(statusLightPin);
    Sys.usleep(200000);
  }
  GPIO.write(statusLightPin, 1);
  
  // enable bluetooth
  Cfg.set({bt:{enable:true}});
  // disable wifi
  Cfg.set({wifi:{sta:{enable:true}}});
  Cfg.set({wifi:{ap:{enable:false}}});
  // clear wifi-config
  // Cfg.set({wifi:{sta:{ssid:'',pass:''}}});

  Sys.reboot(1000);
}, null);

print("Starting...");

GPIO.enable_int(resetPin);
ADC.enable(moisturePin);

let dht = DHT.create(dhtPin, DHT.DHT11);
let deviceId = Cfg.get("device.id");
if (deviceId === "")
{
  deviceId = Cfg.get("higrow.deviceId");
  Cfg.set("device.id", deviceId);
}
let mqttTopic = deviceId + '/sample';
let mqttPowerOnTopic = deviceId + '/poweron';
let sendMqtt = Cfg.get("higrow.send_mqtt");
let sendHttp = Cfg.get("higrow.send_http");
let sendHttpUrl = Cfg.get("higrow.send_http_url");

print("HTTP: ", sendHttp, "URL:", sendHttpUrl);
print("MQTT:", sendMqtt, "Topic:", mqttTopic, "PowerOn Topic:", mqttPowerOnTopic);
let netConnected = false;
let mqttConnected = false;
let sampleTime_ms = Cfg.get("higrow.sample_time") * 1000;
let httpReadyForDeepSleep = false;
let mqttReadyForDeepSleep = false;
let lastActionBeforeSleep = Sys.uptime(); // tracked to be able to wait some time after last action to be sure it is completed
let waitAfterLastActionBeforeSleep = Cfg.get("higrow.wait_after_last_action_before_sleep");

esp_sleep_enable_ext0_wakeup(resetPin, 0);

function enterDeepSleepMode() {
  print("Entering deep sleep mode for", sampleTime_ms/1000, "seconds");
  ESP32.deepSleep(sampleTime_ms * 1000);
  // never reaches this here, except for a couple of milliseconds
  Sys.usleep(300000); // 300ms
  print("DID NOT ENTER DEEP SLEEP!");
}

let readSensors = Timer.set(/*sampleTime_ms*/ 1000, Timer.REPEAT, function() {
  if ((!sendHttp || (sendHttp && httpReadyForDeepSleep)) && (!sendMqtt || (sendMqtt && mqttReadyForDeepSleep))) {
    if (Sys.uptime() > lastActionBeforeSleep + waitAfterLastActionBeforeSleep) {
      enterDeepSleepMode();
    }
    print("wait after last action before deep sleep");
    return; // do nothing for some time, but RPC still is available
  }
  let t = dht.getTemp();
  let h = dht.getHumidity();
  let m = ADC.read(moisturePin);

  print("DeviceId:", deviceId, "Temperature:", t, "Humidity:", h, "Moisture:", m, "DeepSleep:", httpReadyForDeepSleep, "/", mqttReadyForDeepSleep);
  
  if (deviceId !== "" && (!sendHttp || (sendHttp && netConnected)) && (!sendMqtt || (sendMqtt && mqttConnected)))
  {
    GPIO.write(statusLightPin, 0);
    let jsonData = {'DeviceId': deviceId, 'Temperature': t, 'Humidity': h, 'Moisture': m};
    if (sendHttp) {
      HTTP.query({
        headers: {'Content-Type' : 'application/json'},
        url: sendHttpUrl,
        data: jsonData,
        success: function(body, full_http_msg) 
        { 
          print(body);
          httpReadyForDeepSleep = true;
          lastActionBeforeSleep = Sys.uptime();
        },
        error: function(err) 
        { 
          print("ERROR!", err); 
          httpReadyForDeepSleep = true;
          lastActionBeforeSleep = Sys.uptime();
        },
      });
      print("Sent HTTP message: ", jsonData);
    }

    if (sendMqtt) {
      let jsonDataString = JSON.stringify(jsonData);
      // print("Try to send MQTT message: ", jsonDataString, "To:", mqttTopic);
      MQTT.pub(mqttTopic,  jsonDataString, 1, true);
      mqttReadyForDeepSleep = true;
      lastActionBeforeSleep = Sys.uptime();
    }

    GPIO.write(statusLightPin, 1);
    //Timer.del(readSensors);
  }
  else
  {
    print("DeviceId:", deviceId, "Net-Con:", netConnected, "MQTT-Con:", mqttConnected);
    GPIO.write(statusLightPin, 1);
  }

}, null);

// RPC Handlers
RPC.addHandler('HG.Temp.Read', function(args){
  lastActionBeforeSleep = Sys.uptime();
  return { value: dht.getTemp() };
});
RPC.addHandler('HG.Humidity.Read', function(args){
  lastActionBeforeSleep = Sys.uptime();
  return { value: dht.getHumidity() };
});
RPC.addHandler('HG.Moisture.Read', function(args){
  lastActionBeforeSleep = Sys.uptime();
  return { value: ADC.read(moisturePin) };
});
RPC.addHandler('HG.StatusLED.Read', function(args){
  lastActionBeforeSleep = Sys.uptime();
  return { value: GPIO.read(statusLightPin) };
});
RPC.addHandler('HG.StatusLED.On', function(args){
  lastActionBeforeSleep = Sys.uptime();
  GPIO.write(statusLightPin, 0);
  print("LED On");
  if (GPIO.read(statusLightPin) !== 0)
  {
    return false;
  }
  
  return true;
});
RPC.addHandler('HG.StatusLED.Off', function(args){
  lastActionBeforeSleep = Sys.uptime();
  GPIO.write(statusLightPin, 1);
  if (GPIO.read(statusLightPin) !== 1)
  {
    return false;
  }
  
  return true;
});

// Monitor network connectivity.
Event.addGroupHandler(Net.EVENT_GRP, function(ev, evdata, arg) {
  let status = true && netConnected;
  let evs = '???';
  if (ev === Net.STATUS_DISCONNECTED) {
    evs = 'DISCONNECTED';
    netConnected = false;
  } else if (ev === Net.STATUS_CONNECTING) {
    evs = 'CONNECTING';
    netConnected = false;
  } else if (ev === Net.STATUS_CONNECTED) {
    evs = 'CONNECTED';
    netConnected = false;
  } else if (ev === Net.STATUS_GOT_IP) {
    evs = 'GOT_IP';
    netConnected = true;
  }
  
  print(evs);
}, null);

let publishedMessageCount = 0;
let subscribedMessageCount = 0;

// Monitor MQTT connectivity.
MQTT.setEventHandler(function(conn, ev, evdata) {
  let mqttStatus = '???';

  if (ev === MQTT.EV_CONNACK) {
    mqttStatus = 'CONNECTED';
    if (!mqttConnected) {
      MQTT.pub(mqttPowerOnTopic,  "HiGrow sensor booted", 1, true);
    }
    mqttConnected = true;
  } else if (ev === MQTT.EV_PUBLISH) {
    lastActionBeforeSleep = Sys.uptime();
    subscribedMessageCount++;
  } else if (ev === MQTT.EV_PUBACK) {
    publishedMessageCount++;
  } else if (ev === MQTT.EV_CLOSE) {
    mqttStatus = 'DISCONNECTED';
    netConnected = false;
  }
  
  if (mqttStatus !== '???') {
    print("MQTT-Status:", mqttStatus, "Msg-Sub:", subscribedMessageCount, "Msg-Pub:", publishedMessageCount);
  }
}, null);