/*
 * Haunted [Smart] House - RME Spring 2023 Final Project
 * peripheral BLE
 * control lamp
 */

#include <ArduinoBLE.h>
#include "Arduino.h"
#include "DFRobotDFPlayerMini.h"

enum {
  NEUTRAL = 0,
  SHOCKED = 1,
};

const char* deviceServiceUuid = "19b10000-e8f2-537e-4f6c-d104768a1111";
const char* deviceServiceCharacteristicUuid = "19b10001-e8f2-537e-4f6c-d104768a1111";

int shock = 0;

BLEService shockService(deviceServiceUuid);
BLEByteCharacteristic shockCharacteristic(deviceServiceCharacteristicUuid, BLERead | BLEWrite);

DFRobotDFPlayerMini myDFPlayer;
void printDetail(uint8_t type, int value);

int relayPin = D2;
int controlFlag = 0;
int helpFlag = 0;

void setup() {
  Serial1.begin(9600);
  Serial.begin(9600);

  pinMode(relayPin, OUTPUT);

  if (!BLE.begin()) {
    Serial.println("- Starting Bluetooth® Low Energy module failed!");
    while (1)
      ;
  }

  BLE.setLocalName("Arduino Nano 33 BLE (Peripheral)");
  BLE.setAdvertisedService(shockService);
  shockService.addCharacteristic(shockCharacteristic);
  BLE.addService(shockService);
  shockCharacteristic.writeValue(-1);
  BLE.advertise();

  Serial.println("Nano 33 BLE (Peripheral Device)");
  Serial.println(" ");

  Serial.println(F("DFRobot DFPlayer Mini Demo"));
  Serial.println(F("Initializing DFPlayer ... (May take 3~5 seconds)"));

  if (!myDFPlayer.begin(Serial1)) {  //Use softwareSerial to communicate with mp3.
    Serial.println(F("Unable to begin:"));
    Serial.println(F("1.Please recheck the connection!"));
    Serial.println(F("2.Please insert the SD card!"));
    while (true) {
      delay(0);  // Code to compatible with ESP8266 watch dog.
    }
  }
  Serial.println(F("DFPlayer Mini online."));

  myDFPlayer.volume(10);  //Set volume value. From 0 to 30
}

void loop() {
  BLEDevice central = BLE.central();
  // Serial.println("- Discovering central device...");
  delay(500);

  if (central) {
    Serial.println("* Connected to central device!");
    Serial.print("* Device MAC address: ");
    Serial.println(central.address());
    Serial.println(" ");

    controlEffect();

    while (central.connected()) {
      if (shockCharacteristic.written()) {
        shock = shockCharacteristic.value();
        Serial.println("in the loop");
        Serial.println(shock);

        writeShock(shock);
      }
    }

    shock = NEUTRAL;
    writeShock(shock);

    thanksEffect();

    Serial.println("* Disconnected to central device!");
  }
}

void writeShock(int shock) {
  Serial.println("- Characteristic <shock_type> has changed!");

  switch (shock) {
    case NEUTRAL:
      Serial.println("* Actual value: NEUTRAL (red LED on)");
      Serial.println(" ");
      digitalWrite(LEDR, LOW);
      digitalWrite(LEDG, HIGH);
      digitalWrite(LEDB, HIGH);
      digitalWrite(LED_BUILTIN, LOW);
      break;
    case SHOCKED:
      Serial.println("* Actual value: SHOCK (green LED on)");
      Serial.println(" ");
      digitalWrite(LEDR, HIGH);
      digitalWrite(LEDG, LOW);
      digitalWrite(LEDB, HIGH);
      digitalWrite(LED_BUILTIN, LOW);
      helpEffect();
      break;
    default:
      Serial.println("* Actual value: NEUTRAL (red LED on)");
      Serial.println(" ");
      digitalWrite(LEDR, LOW);
      digitalWrite(LEDG, HIGH);
      digitalWrite(LEDB, HIGH);
      digitalWrite(LED_BUILTIN, LOW);
      break;
  }
}

void controlEffect() {
  Serial.println("control false");  // Switch Relay Off (NC)
  digitalWrite(relayPin, LOW);
  delay(500);
  Serial.println("control true");  // Switch Relay On (NO)
  digitalWrite(relayPin, HIGH);
  int delayTime = delayTime = random(6000, 30000);
  myDFPlayer.play(1);  //Play the first mp3
  delay(delayTime);
}

void helpEffect() {
  int helpFlag = random(0, 2);
  int delayTime = 0;

  if (helpFlag == 1) {
    int randomTime = random(1, 3);
    for (int i = 0; i < randomTime; randomTime++) {
      Serial.println("help false");  // Switch Relay Off (NC)
      delayTime = random(50, 500);
      digitalWrite(relayPin, LOW);
      delay(delayTime);
      delayTime = random(50, 500);
      Serial.println("help true");  // Switch Relay On (NO)
      digitalWrite(relayPin, HIGH);
      delay(delayTime);
    }
    myDFPlayer.next();  //Play the first mp3
    delayTime = random(6000, 15000);
    delay(delayTime);
  }
}

void thanksEffect() {
  myDFPlayer.play(2);  //Play the first mp3
}