#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#

#
# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
# Copyright (c) 2012, 2020 by Delphix. All rights reserved.
#

STF_PASS=0
STF_FAIL=1
STF_UNRESOLVED=2
STF_UNSUPPORTED=4
STF_UNTESTED=5

# Output an assertion
#
# $@ - assertion text

function log_assert
{
	_printline ASSERTION: "$@"
}

# Output a comment
#
# $@ - comment text

function log_note
{
	_printline NOTE: "$@"
}

# Execute and print command with status where success equals non-zero result
#
# $@ - command to execute
#
# return 0 if command fails, otherwise return 1

function log_neg
{
	log_neg_expect "" "$@"
}

# Execute a positive test and exit $STF_FAIL is test fails
#
# $@ - command to execute

function log_must
{
	log_pos "$@" || log_fail
}

# Execute a positive test (expecting no stderr) and exit $STF_FAIL
# if test fails
# $@ - command to execute

function log_must_nostderr
{
	log_pos_nostderr "$@" || log_fail
}

# Execute a positive test but retry the command on failure if the output
# matches an expected pattern.  Otherwise behave like log_must and exit
# $STF_FAIL is test fails.
#
# $1 - retry keyword
# $2 - retry attempts
# $3-$@ - command to execute
#
function log_must_retry
{
	typeset logfile="/tmp/log.$$"
	typeset status=1
	typeset expect=$1
	typeset retry=$2
	typeset delay=1
	shift 2

	while [[ -e $logfile ]]; do
		logfile="$logfile.$$"
	done

	while (( $retry > 0 )); do
		"$@" 2>$logfile
		status=$?

		if (( $status == 0 )); then
			if grep -qEi "internal error|assertion failed" $logfile; then
				cat $logfile >&2
				_printerror "$@" "internal error or" \
					" assertion failure exited $status"
				status=1
			else
				[[ -n $LOGAPI_DEBUG ]] && cat $logfile
				_printsuccess "$@"
			fi
			break
		else
			if grep -qi "$expect" $logfile; then
				cat $logfile >&2
				_printerror "$@" "Retry in $delay seconds"
				sleep $delay

				(( retry=retry - 1 ))
				(( delay=delay * 2 ))
			else
				break;
			fi
		fi
	done

	if (( $status != 0 )) ; then
		cat $logfile >&2
		_printerror "$@" "exited $status"
	fi

	_recursive_output $logfile "false"
	return $status
}

# Execute a positive test and exit $STF_FAIL is test fails after being
# retried up to 5 times when the command returns the keyword "busy".
#
# $@ - command to execute
function log_must_busy
{
	log_must_retry "busy" 5 "$@" || log_fail
}

# Execute a negative test and exit $STF_FAIL if test passes
#
# $@ - command to execute

function log_mustnot
{
	log_neg "$@" || log_fail
}

# Execute a negative test with keyword expected, and exit
# $STF_FAIL if test passes
#
# $1 - keyword expected
# $2-$@ - command to execute

function log_mustnot_expect
{
	log_neg_expect "$@" || log_fail
}

# Signal numbers are platform-dependent
case $(uname) in
Darwin|FreeBSD)
	SIGBUS=10
	SIGSEGV=11
	;;
illumos|Linux|*)
	SIGBUS=7
	SIGSEGV=11
	;;
esac
EXIT_SUCCESS=0
EXIT_NOTFOUND=127
EXIT_SIGNAL=256
EXIT_SIGBUS=$((EXIT_SIGNAL + SIGBUS))
EXIT_SIGSEGV=$((EXIT_SIGNAL + SIGSEGV))

# Execute and print command with status where success equals non-zero result
# or output includes expected keyword
#
# $1 - keyword expected
# $2-$@ - command to execute
#
# return 0 if command fails, or the output contains the keyword expected,
# return 1 otherwise

function log_neg_expect
{
	typeset logfile="/tmp/log.$$"
	typeset ret=1
	typeset expect=$1
	shift

	while [[ -e $logfile ]]; do
		logfile="$logfile.$$"
	done

	"$@" 2>$logfile
	typeset status=$?

	# unexpected status
	if (( $status == EXIT_SUCCESS )); then
		 cat $logfile >&2
		_printerror "$@" "unexpectedly exited $status"
	# missing binary
	elif (( $status == EXIT_NOTFOUND )); then
		cat $logfile >&2
		_printerror "$@" "unexpectedly exited $status (File not found)"
	# bus error - core dump
	elif (( $status == EXIT_SIGBUS )); then
		cat $logfile >&2
		_printerror "$@" "unexpectedly exited $status (Bus Error)"
	# segmentation violation - core dump
	elif (( $status == EXIT_SIGSEGV )); then
		cat $logfile >&2
		_printerror "$@" "unexpectedly exited $status (SEGV)"
	else
		if grep -qEi "internal error|assertion failed" $logfile; then
			cat $logfile >&2
			_printerror "$@" "internal error or assertion failure" \
				" exited $status"
		elif [[ -n $expect ]] ; then
			if grep -qi "$expect" $logfile; then
				ret=0
			else
				cat $logfile >&2
				_printerror "$@" "unexpectedly exited $status"
			fi
		else
			ret=0
		fi

		if (( $ret == 0 )); then
			[[ -n $LOGAPI_DEBUG ]] && cat $logfile
			_printsuccess "$@" "exited $status"
		fi
	fi
	_recursive_output $logfile "false"
	return $ret
}

# Execute and print command with status where success equals zero result
#
# $@ command to execute
#
# return command exit status

function log_pos
{
	typeset logfile="/tmp/log.$$"

	while [[ -e $logfile ]]; do
		logfile="$logfile.$$"
	done

	"$@" 2>$logfile
	typeset status=$?

	if (( $status != 0 )) ; then
		cat $logfile >&2
		_printerror "$@" "exited $status"
	else
		if grep -qEi "internal error|assertion failed" $logfile; then
			cat $logfile >&2
			_printerror "$@" "internal error or assertion failure" \
				" exited $status"
			status=1
		else
			[[ -n $LOGAPI_DEBUG ]] && cat $logfile
			_printsuccess "$@"
		fi
	fi
	_recursive_output $logfile "false"
	return $status
}

# Execute and print command with status where success equals zero result
# and no stderr output
#
# $@ command to execute
#
# return 0 if command succeeds and no stderr output
# return 1 othersie

function log_pos_nostderr
{
	typeset logfile="/tmp/log.$$"

	while [[ -e $logfile ]]; do
		logfile="$logfile.$$"
	done

	"$@" 2>$logfile
	typeset status=$?

	if (( $status != 0 )) ; then
		cat $logfile >&2
		_printerror "$@" "exited $status"
	else
		if [ -s "$logfile" ]; then
			cat $logfile >&2
			_printerror "$@" "message in stderr" \
				" exited $status"
			status=1
		else
			[[ -n $LOGAPI_DEBUG ]] && cat $logfile
			_printsuccess "$@"
		fi
	fi
	_recursive_output $logfile "false"
	return $status
}

# Set an exit handler
#
# $@ - function(s) to perform on exit

function log_onexit
{
	_CLEANUP=("$*")
}

# Push an exit handler on the cleanup stack
#
# $@ - function(s) to perform on exit

function log_onexit_push
{
	_CLEANUP+=("$*")
}

# Pop an exit handler off the cleanup stack

function log_onexit_pop
{
	_CLEANUP=("${_CLEANUP[@]:0:${#_CLEANUP[@]}-1}")
}

#
# Exit functions
#

# Perform cleanup and exit $STF_PASS
#
# $@ - message text

function log_pass
{
	_endlog $STF_PASS "$@"
}

# Perform cleanup and exit $STF_FAIL
#
# $@ - message text

function log_fail
{
	_endlog $STF_FAIL "$@"
}

# Perform cleanup and exit $STF_UNRESOLVED
#
# $@ - message text

function log_unresolved
{
	_endlog $STF_UNRESOLVED "$@"
}

# Perform cleanup and exit $STF_UNSUPPORTED
#
# $@ - message text

function log_unsupported
{
	_endlog $STF_UNSUPPORTED "$@"
}

# Perform cleanup and exit $STF_UNTESTED
#
# $@ - message text

function log_untested
{
	_endlog $STF_UNTESTED "$@"
}

function set_main_pid
{
	_MAINPID=$1
}

#
# Internal functions
#

# Execute custom callback scripts on test failure
#
# callback script paths are stored in TESTFAIL_CALLBACKS, delimited by ':'.

function _execute_testfail_callbacks
{
	typeset callback

	while read -d ":" callback; do
		if [[ -n "$callback" ]] ; then
			log_note "Performing test-fail callback ($callback)"
			$callback
		fi
	done <<<"$TESTFAIL_CALLBACKS:"
}

# Perform cleanup and exit
#
# $1 - stf exit code
# $2-$n - message text

function _endlog
{
	typeset logfile="/tmp/log.$$"
	_recursive_output $logfile

	typeset exitcode=$1
	shift
	(( ${#@} > 0 )) && _printline "$@"

	#
	# If we're running in a subshell then just exit and let
	# the parent handle the failures
	#
	if [[ -n "$_MAINPID" && $$ != "$_MAINPID" ]]; then
		log_note "subshell exited: "$_MAINPID
		exit $exitcode
	fi

	if [[ $exitcode == $STF_FAIL ]] ; then
		_execute_testfail_callbacks
	fi

	typeset stack=("${_CLEANUP[@]}")
	log_onexit ""
	typeset i=${#stack[@]}
	while (( i-- )); do
		typeset cleanup="${stack[i]}"
		log_note "Performing local cleanup via log_onexit ($cleanup)"
		$cleanup
	done

	exit $exitcode
}

# Output a formatted line
#
# $@ - message text

function _printline
{
	echo "$@"
}

# Output an error message
#
# $@ - message text

function _printerror
{
	_printline ERROR: "$@"
}

# Output a success message
#
# $@ - message text

function _printsuccess
{
	_printline SUCCESS: "$@"
}

# Output logfiles recursively
#
# $1 - start file
# $2 - indicate whether output the start file itself, default as yes.

function _recursive_output #logfile
{
	typeset logfile=$1

	while [[ -e $logfile ]]; do
		if [[ -z $2 || $logfile != $1 ]]; then
			cat $logfile
		fi
		rm -f $logfile
		logfile="$logfile.$$"
	done
}