import time
import RPi.GPIO as GPIO
import os
import socket

# Configuration réseau et InfluxDB
hostname = socket.gethostname()
cityserver = "172.16.13.7"
db_name = "proximity_sensor"
record_name = "proximity_measure"
username = "influx_user"
password = "w1GYhmBvo"

# Configuration des broches GPIO
GPIO.setmode(GPIO.BCM)
GPIO_TRIGGER = 17
GPIO_ECHO = 27

GPIO.setup(GPIO_TRIGGER, GPIO.OUT)
GPIO.setup(GPIO_ECHO, GPIO.IN)

# Stabilisation du capteur
GPIO.output(GPIO_TRIGGER, False)
time.sleep(0.5)

try:
    while True:
        # Envoi d'une impulsion de 10µs
        GPIO.output(GPIO_TRIGGER, True)
        time.sleep(0.00001)
        GPIO.output(GPIO_TRIGGER, False)

        # Attente du début de la réception
        while GPIO.input(GPIO_ECHO) == 0:
            start = time.time()

        # Attente de la fin de la réception
        while GPIO.input(GPIO_ECHO) == 1:
            stop = time.time()

        # Calcul de la distance
        elapsed = stop - start
        distance = (elapsed * 34300) / 2  # Vitesse du son ~343 m/s

        dis_rounded = round(distance, 2)
        dis_text = str(dis_rounded)

        # Envoi des données à InfluxDB via curl
        cmd = (
            "curl -i -XPOST 'http://{server}:8086/write?"
            "u={user}&p={pwd}&db={db}' --data-binary "
            "'{rec},host={host} value={val}'"
        ).format(
            server=cityserver,
            user=username,
            pwd=password,
            db=db_name,
            rec=record_name,
            host=hostname,
            val=dis_text
        )

        os.system(cmd)

        time.sleep(1)

except KeyboardInterrupt:
    print("Mesure interrompue par l'utilisateur")

finally:
    GPIO.cleanup()