#include <math.h>

// Fungsi aktivasi sigmoid biner
float sigmoidBinary(float x) {
  return 1.0 / (1.0 + exp(-x));
}
// Fungsi aktivasi sigmoid bipolar
float sigmoidBipolar(float x) {
  return 2.0 / (1.0 + exp(-x)) - 1.0;
}
// Fungsi sigmoid parametrik
float parametricSigmoid(float x, float a) {
  return 1.0 / (1.0 + exp(-a * x));
}


// Fungsi aktivasi hiperbolik tangen (tanh)
float tanhActivation(float x) {
  return tanh(x);
}

// Fungsi Exponential Linear Unit (ELU)
float eluActivation(float x, float alpha) {
  return (x > 0) ? x : alpha * (exp(x) - 1);
}

// Fungsi ReLU (Rectified Linear Unit)
float reluActivation(float x) {
  return max(0.0f, x);
}
// Fungsi Leaky ReLU
float leakyReluActivation(float x, float alpha) {
  return (x > 0) ? x : alpha * x;
}


// Fungsi sigmoid softplus
float softplusActivation(float x) {
  return log(1.0 + exp(x));
}


// Fungsi Softmax - untuk lapisan keluaran
void softmaxActivation(float* x, int length) {
  float sum = 0.0;
  for (int i = 0; i < length; i++) {
    x[i] = exp(x[i]);
    sum += x[i];
  }
  for (int i = 0; i < length; i++) {
    x[i] /= sum;
  }
}


void hasil(String b, float a) {
  Serial.print(b); Serial.print(" = "); Serial.println(a);
}

float a = -1.11;

void setup() {
  Serial.begin(115200);
  // Setup di sini
}

void loop() {
  Serial.print("\n a = ");
  Serial.println(a);

  hasil("sigmoidBinary", sigmoidBinary(a));

  hasil("sigmoidBipolar", sigmoidBipolar(a));

  float aParametric = 2.0; // Parameter a dapat disesuaikan
  hasil("parametricSigmoid", parametricSigmoid(a, aParametric));

  hasil("tanh", tanhActivation(a));

  float alphaELU = 1.0;
  hasil("elu", eluActivation(a, alphaELU));

  hasil("relu", reluActivation(a));

  float alphaLeakyRelu = 0.01; // Parameter alpha dapat disesuaikan
  hasil("leakyRelu", leakyReluActivation(a, alphaLeakyRelu));

  hasil("softplus", softplusActivation(a));

  const int lengthSoftmax = 3;
  float inputSoftmax[lengthSoftmax] = {a, random(-3, 3), random(-3, 3)};
  // Tampilkan input sebelum softmax
  Serial.print("Input sebelum softmax: ");
  for (int i = 0; i < lengthSoftmax; i++) {
    Serial.print(inputSoftmax[i], 4); // Menampilkan 4 digit desimal
    Serial.print(" ");
  }
  Serial.println();
  softmaxActivation(inputSoftmax, lengthSoftmax);
  // Tampilkan output setelah softmax
  Serial.print("Output setelah softmax: ");
  for (int i = 0; i < lengthSoftmax; i++) {
    Serial.print(inputSoftmax[i], 4); // Menampilkan 4 digit desimal
    Serial.print(" ");
  }
  Serial.println();



  a = (a > 2.11) ? -1.01 : a + 0.01;
  delay(1000); // Delay untuk kestabilan
}