#!/usr/bin/env bash

# test that Zebra can shut down without errors

# print every command run by this script
#set -x

# initial shutdown delay
# interesting delays are between 1-30 seconds on most machines
SHUTDOWN_DELAY=0

# each test increases the shutdown delay by this much
SHUTDOWN_DELAY_INCREMENT=1

# final shutdown delay
# the test stops after a successful run with a delay this long
SHUTDOWN_DELAY_LIMIT=30

echo "Building Zebra"
echo

cargo build --bin zebrad || exit $?

EXIT_STATUS=0
while [ $EXIT_STATUS -eq 0 ] && [ $SHUTDOWN_DELAY -le $SHUTDOWN_DELAY_LIMIT ]; do
    # remove previously downloaded Zcash parameter files
    #
    # if you don't have these downloaded already, the killed downloads will be incomplete,
    # which causes an error in Zebra
    # rm -r ~/.zcash-params

    echo
    echo "Running Zebra for $SHUTDOWN_DELAY seconds"
    echo

    # shut down Zebra if this script exits while it's running,
    # but ignore "no such job" errors if Zebra has already exited
    trap "kill %?zebrad 2> /dev/null" EXIT

    target/debug/zebrad start &
    sleep $SHUTDOWN_DELAY

    echo
    echo "Killing Zebra after $SHUTDOWN_DELAY seconds"
    echo

    kill %?zebrad
    wait %?zebrad
    EXIT_STATUS=$?

    # fix up the exit status caused by 'kill'
    if [ $EXIT_STATUS -eq 143 ]; then
        EXIT_STATUS=0
    fi

    echo
    echo "Killing Zebra after $SHUTDOWN_DELAY seconds exited with $EXIT_STATUS"
    echo

    SHUTDOWN_DELAY=$[SHUTDOWN_DELAY + SHUTDOWN_DELAY_INCREMENT]
done

exit $EXIT_STATUS