#!/usr/bin/env python3
"""A complete GEM tool in ~25 lines.

Run secs_gemd, then this. The fab host can poll ChamberPressure, receive
ProcessStarted events, get alarms above the threshold, and START the tool —
all SEMI plumbing handled by the daemon.
"""
import random
import time

from secsgem_client import Equipment

eq = Equipment("localhost:50051")


@eq.on("START")
def start(cmd):
    print("host says START", cmd.params)
    eq.fire("ProcessStarted")


eq.listen(background=True)

while True:
    pressure = round(random.uniform(1.0, 3.0), 3)
    eq.set(ChamberPressure=pressure)
    if pressure > 2.9:
        eq.alarm("chiller_temp_high")
    else:
        eq.clear("chiller_temp_high")
    time.sleep(1)