import argparse
import time
import sys
from iotile.core.hw import HardwareManager


def build_parser():
    parser = argparse.ArgumentParser(description="Print broadcast readings from a specific device")
    parser.add_argument('-d', '--dev', type=lambda x: int(x, 0), help="Optional, the UUID of the device you want to see broadcasts from (0x21 for example)")
    parser.add_argument('-i', '--interval', type=float, default=1.0, help="The minimum interval in seconds between two reported readings (only applies when -d is given), defaults to 1s")
    parser.add_argument('-p', '--port', default="bled112", help="The port to use, defaults to bled112")

    return parser


def main():
    parser = build_parser()
    args = parser.parse_args()

    with HardwareManager(port=args.port) as hw:
        hw.enable_broadcasting()

        while True:
            found_reading = False
            for report in hw.iter_broadcast_reports(blocking=False):

                print(report)
                if args.dev is not None and report.origin != args.dev:
                    continue

                if not (args.dev and found_reading):
                    reading = report.visible_readings[0]
                    print("%04X: %d" % (reading.stream, reading.value))

                found_reading = True

            time.sleep(args.interval)


if __name__ == "__main__":
    sys.exit(main())