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#!/bin/bash

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rm -f ./SRVOK ./PLCOK

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# Run server

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$BEREMIZPYTHONPATH - > >(

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    echo "Start SRV loop"

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    while read line; do 

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        # Wait for server to print modified value

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        echo "SRV>> $line"

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        if [[ "$line" == 3.4 ]]; then

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            echo "PLC could write value"

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            touch ./SRVOK

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        fi

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    done

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    echo "End SRV loop"

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) << EOF &

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import sys

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import os

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import time

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import asyncio

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from asyncua import Server

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async def main():

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    server = Server()

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    host = os.environ.get("OPCUA_DEFAULT_HOST", "127.0.0.1")

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    endpoint = "opc.tcp://"+host+":4840/freeopcua/server/"

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    await server.init()

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    server.set_endpoint(endpoint)

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    uri = "http://beremiz.github.io"

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    idx = await server.register_namespace(uri)

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    objects = server.get_objects_node()

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    testobj = await objects.add_object(idx, "TestObject")

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    testvarout = await testobj.add_variable(idx, "TestOut", 1.2)

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    testvar = await testobj.add_variable(idx, "TestIn", 5.6)

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    await testvar.set_writable()

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    await server.start()

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    try:

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        while True:

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            await asyncio.sleep(1)

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            print(await testvar.get_value())

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            sys.stdout.flush()

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    finally:

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        await server.stop()

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asyncio.run(main())

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EOF

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SERVER_PID=$!

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# Start PLC with opcua test

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setsid $BEREMIZPYTHONPATH $BEREMIZPATH/Beremiz_cli.py -k \

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     --project-home $BEREMIZPATH/tests/projects/opcua_client build transfer run > >(

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echo "Start PLC loop"

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while read line; do 

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    # Wait for PLC runtime to output expected value on stdout

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    echo "PLC>> $line"

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    if [[ "$line" == 1.2 ]]; then

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        echo "PLC could read value"

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        touch ./PLCOK

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    fi

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done

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echo "End PLC loop"

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) &

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PLC_PID=$!

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echo all subprocess started, start polling results

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res=110  # default to ETIMEDOUT

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c=30

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while ((c--)); do

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    if [[ -a ./SRVOK && -a ./PLCOK ]]; then

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        echo got results.

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        res=0  # OK success

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        break

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    else

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        echo waiting.... $c

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        sleep 1

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    fi

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done

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# Kill PLC and subprocess

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echo will kill PLC:$PLC_PID and SERVER:$SERVER_PID

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pkill -s $PLC_PID 

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kill $SERVER_PID

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exit $res