#include "DeviceLed.h"

void DeviceLed::setLed(int value) {
  analogWrite(pinLed, value);
}

void DeviceLed::publishStatus() {
  DynamicJsonBuffer json_outBuffer;
  JsonObject& json_out = json_outBuffer.createObject();
  json_out["brightness"] = brightness;
  String response;
  json_out.printTo(response);
  Serial.print("led state: ");
  Serial.println(response);
  Homie.setNodeProperty(ledNode, "brightness", response);
}

void DeviceLed::deviceSetup() {
  pinMode(pinLed, OUTPUT);
  setLed(brightness);
}

bool DeviceLed::ledOnHandler(String value) {
  if (value == "true") {
    setLed(brightness);
    Homie.setNodeProperty(ledNode, "on", "true");
    Serial.println("led is on");
  } else if (value == "false") {
    setLed(0);
    Homie.setNodeProperty(ledNode, "on", "false");
    Serial.println("led is off");
  } else {
    return false;
  }
  return true;
}

bool DeviceLed::ledBrightnessHandler(String message) {
  DynamicJsonBuffer json_inBuffer;
  JsonObject& json_in = json_inBuffer.parseObject(message);
  if (json_in.success()) {
    if (json_in.containsKey("brightness")) {
      brightness = json_in["brightness"];
    }
    setLed(brightness);
  } else {
    Serial.println("parsing of JSON failed");
  }
  publishStatus();
  return true;
}

bool DeviceLed::ledFadeHandler(String message) {
  DynamicJsonBuffer json_inBuffer;
  JsonObject& json_in = json_inBuffer.parseObject(message);
  if (json_in.success()) {
    fade_from = brightness;
    if (json_in.containsKey("brightness")) {
      fade_to = json_in["brightness"];
    } else {
      fade_to = brightness;
    }
    fade_start = millis();
    if (json_in.containsKey("seconds")) {
      fade_end = fade_start + 1000 * (int)json_in["seconds"];
    } else {
      fade_end = 0;
    }
    fading = true;
  } else {
    Serial.println("parsing of JSON failed");
  }
  return true;
}

void DeviceLed::deviceRegister() {
  ledNode.subscribe("on", [this](String value) { return ledOnHandler(value); });
  ledNode.subscribe("brightness", [this](String value) { return ledBrightnessHandler(value); });
  ledNode.subscribe("fade", [this](String value) { return ledFadeHandler(value); });
  Homie.registerNode(ledNode);
}

void DeviceLed::deviceLoop() {
  if (fading) {
    if (fade_end > millis()) {
      float progress = 1.0 * (millis() - fade_start) / (fade_end - fade_start);
      if ((int)(progress * 100) != (int)(progress_last * 100)) {
        brightness = fade_from + (fade_to - fade_from) * progress;
        setLed(brightness);
        progress_last = progress;
      }
    } else {
      brightness = fade_to;
      setLed(brightness);
      publishStatus();
      fading = false;
    }
  }
  return;
}