import time

from unittest.test import equivalency_chk

from .help import DELAY_SET_GET


def device_follow(tLogger, master, master_key, slave, slave_key, values, switch_on):
    # Prepare System
    if switch_on is not None:
        switch_on.set(switch_on.KEY_OUTPUT_0, True)
        time.sleep(DELAY_SET_GET)
        tLogger.debug("Prepare: Switching on device")
    # Prepare devices to last state
    start_state = values[-1]
    master.set(master_key, start_state)
    slave.set(slave_key, start_state)
    time.sleep(DELAY_SET_GET)
    tLogger.debug("Prepare: Setting devices to last state %s", repr(start_state))
    master_exp = master.get(master_key)
    slave_exp = slave.get(slave_key)
    equivalency_chk((master_exp, slave_exp), (start_state, start_state), tLogger, "Start state (master, slave)")
    #
    # Test devices
    for value in values:
        master.set(master_key, value)
        time.sleep(DELAY_SET_GET)
        tLogger.debug("Setting state of %s to %s", master.get_name(master_key, master.topic), repr(value))
        result = slave.get(slave_key)
        equivalency_chk(result, value, tLogger, f"Value for {slave.get_name(slave_key, slave.topic)}")