#ifndef TMP36_ANALOG_H
#define TMP36_ANALOG_H

#include "tmp36.h"
#include "hal.h"

/*
 * TMP36 -- Real hardware implementation (analog read).
 *
 * The TMP36 outputs a voltage proportional to temperature:
 *   - 10 mV per degree Celsius
 *   - 500 mV offset at 0 C (so 750 mV = 25 C)
 *   - Range: -40 C to +125 C
 *
 * Wiring:
 *   TMP36 pin 1 (left)   -> 5V (or 3.3V)
 *   TMP36 pin 2 (middle) -> Analog input (A0 by default)
 *   TMP36 pin 3 (right)  -> GND
 *
 * If your board runs at 3.3V, pass 3.3f as ref_voltage.
 */
class Tmp36Analog : public TempSensor {
public:
    /// Create a TMP36 sensor on the given analog pin.
    /// ref_voltage: board reference voltage (5.0 for Uno, 3.3 for Due/ESP).
    Tmp36Analog(Hal* hal, uint8_t pin, float ref_voltage = 5.0f)
        : hal_(hal)
        , pin_(pin)
        , ref_mv_(ref_voltage * 1000.0f)
    {}

    float readCelsius() override {
        int raw = hal_->analogRead(pin_);
        float mv = (float)raw * ref_mv_ / 1024.0f;
        return (mv - 500.0f) / 10.0f;
    }

    int readRaw() override {
        return hal_->analogRead(pin_);
    }

private:
    Hal* hal_;
    uint8_t pin_;
    float ref_mv_;
};

#endif // TMP36_ANALOG_H