// sensors.cpp — bring-up stubs. Replace TODOs with real driver calls.
#include "sensors.h"
#include "config.h"
#include <Wire.h>
#include <math.h>
void sensors_begin(){ Wire.begin(I2C_SDA, I2C_SCL); /* TODO init TMP117, ADXL355, SHT4x */ }
static float readVibRMS(){ /* TODO ADXL355 burst -> RMS g */ return 0.0f; }
Reading sensors_read(){
  Reading r{};
  r.t = (uint32_t)(millis()/1000);
  // TODO: real I2C reads. Placeholders keep the pipeline runnable on the bench.
  r.pipe_c = NAN; r.amb_c = NAN; r.amb_rh = NAN; r.press_psi = NAN; r.ndir_ppm = NAN;
  r.vib_rms = readVibRMS();
  r.ultra = (float)analogRead(PIN_ULTRA)/4095.0f;
  r.press_psi = ((float)analogRead(PIN_PRESS)/4095.0f)*600.0f;   // 0-600 psi map (calibrate)
  r.running = r.vib_rms >= RUNSTATE_G_THRESH;
  return r;
}
float leak_risk_score(const Reading& r){
  // SCREEN heuristic: weight ultrasonic band energy, gated by run-state. Calibrate w/ data.
  if(!r.running) return 0.0f;
  float s = r.ultra;                 // TODO add pressure-droop + temp terms after calibration
  return fminf(1.0f, fmaxf(0.0f, s));
}