#! /bin/bash -efu

debug() {
	if [ -n "$DEBUG" ]; then
		echo "$*" >&2
	fi
}

msg_usage() {
	cat <<_EOF_
Run language coverage test.

Usage:
$PROG <options>

Options:
-h, --help		Display this help and exit
-v, --verbose		Turn on debug
-l, --lang=LANG		Test LANG language coverage (default: en)
-p, --path=PATH		Test fonts on PATH
-n, --name=NAME		Set NAME to store a log file.
-a, --artifactsdir=DIR	test environment dir to store artifacts
-e, --exclude=FILE	Exclude FILE to check.
-i, --include=FILE	Include File to check.
_EOF_
}

PROG="${PROG:-${0##*/}}"
DEBUG="${DEBUG:-}"
OPT_LANG="${OPT_LANG:-en}"
OPT_PATH="${OPT_PATH:-}"
OPT_ARTIFACTS_DIR="${OPT_ARTIFACTS_DIR:-}"
OPT_EXCLUDE=()
OPT_INCLUDE=()
OPT_NAME="${OPT_NAME:-}"

opt=$(getopt -n "$0" --options "hvl:p:n:a:e:i:" --longoptions "help,verbose,lang:,path:,name:,artifactsdir:,exclude:,include:" -- "$@")
eval set -- "$opt"
while [[ $# -gt 0 ]]; do
	case "$1" in
	-n|--name)
		OPT_NAME="$2"
		shift 2
		;;
	-i|--include)
		OPT_INCLUDE+=("$2")
		shift 2
		;;
	-e|--exclude)
		OPT_EXCLUDE+=("$2")
		shift 2
		;;
	-a|--artifactsdir)
		OPT_ARTIFACTS_DIR="$2"
		shift 2
		;;
	-p|--path)
		OPT_PATH="$2"
		shift 2
		;;
	-l|--lang)
		OPT_LANG="$2"
		shift 2
		;;
	-v|--verbose)
		DEBUG="-v"
		shift
		;;
	-h|--help)
		msg_usage
		exit 0
		;;
	--)
		shift
		;;
	*)
		msg_usage
		exit 1
	esac
done

if [ -z "$OPT_ARTIFACTS_DIR" ] || [ -z "$OPT_LANG" ] || [ -z "$OPT_PATH" ]; then
	echo "Use: $PROG -h for help."
	exit 0
fi

debug "Path: $OPT_PATH"
debug "Lang: $OPT_LANG"
debug "Artifacts dir: $OPT_ARTIFACTS_DIR"
debug "Exclude: ${OPT_EXCLUDE[@]}"
debug "Include: ${OPT_INCLUDE[@]}"
STR_TEST_DASHED=$(echo "${OPT_NAME:-${OPT_LANG}_${OPT_PATH}}" | sed -e 's/\//-/g')

clean_exit() {
	rc=$?;
	trap - SIGINT SIGTERM SIGABRT EXIT
	echo "Run test $OPT_PATH: done."
	for pid in $(ps -o pid --no-headers --ppid $$); do
		if [ -n "$(ps -p $pid -o pid=)" ]; then
			kill -s HUP $pid
		fi
	done
	local log_file_name="$STR_TEST_DASHED.log"
	local log_file_path="$OPT_ARTIFACTS_DIR/$log_file_name"
	local status
	if [[ $rc -eq 127 ]]; then
		status="ERROR"
	elif grep -q "RESULT: WARN" "$log_file_path"; then
		status="ERROR"
	elif grep -q "RESULT: FAIL" "$log_file_path"; then
		status="FAIL"
	elif grep -q "RESULT: PASS" "$log_file_path"; then
		status="PASS"
	elif grep -q "FAIL" "$log_file_path"; then
		status="FAIL"
	elif grep -q "PASS" "$log_file_path"; then
		status="PASS"
	else
		status="ERROR"
	fi
	echo "$status $OPT_PATH" >> "$OPT_ARTIFACTS_DIR/test.log"
	mv "$log_file_path" "$OPT_ARTIFACTS_DIR/${status}_${log_file_name}"
	local results="$OPT_ARTIFACTS_DIR/results.yml"
	local result=$(echo $status | tr '[:upper:]' '[:lower:]')
	test -f "$results" || echo 'results:' > "$results"
	echo "- {result: $result, test: $OPT_PATH}" >> "$results"
	exit 0
}
trap clean_exit SIGINT SIGTERM SIGABRT EXIT

mkdir -p "$OPT_ARTIFACTS_DIR"
export OUTPUTFILE="$(realpath "$OPT_ARTIFACTS_DIR")/$STR_TEST_DASHED-out.log"
logfile_stdout="$OPT_ARTIFACTS_DIR/$STR_TEST_DASHED.log"
logfile_stderr="$OPT_ARTIFACTS_DIR/$STR_TEST_DASHED-err.log"
exec 3>&1 4>&2 1> >(tee -a "$logfile_stdout" >&3) 2> >(tee -a "$logfile_stderr" >&4)

contains() {
	local e match="$1"
	shift
	for e; do [[ "$e" == "$match" ]] && return 1; done
	return 0
}

debug "Check language coverage"
set +f
for i in `find $OPT_PATH -regex '.*/*\.\(t1\)?\(ttf\)?\(otf\)?\(ttc\)?\(pcf.*\)?\(pfa\)?'`; do
set -f
	debug "$i"
	if test -f $i; then
		n=`basename $i`
		set +e
		contains "$n" "${OPT_EXCLUDE[@]}"
		ret=$?
		set -e
		if [ $ret -eq 1 ]; then
			debug "ignoring $i"
			continue
		fi
		if [ ${#OPT_INCLUDE[@]} -ne 0 ]; then
			set +e
			contains "$n" "${OPT_INCLUDE[@]}"
			ret=$?
			set -e
			if [ $ret -eq 0 ]; then
				debug "$i isn't targeted file"
				continue
			fi
		fi
		debug "  $i"
		res=`fc-validate -l $OPT_LANG $i`
		if echo $res | grep -q Missing; then
			echo "RESULT: FAIL: $i doesn't satisfy $OPT_LANG language coverage."
		else
			echo "RESULT: PASS: $i satisfy $OPT_LANG language coverage."
		fi
	fi
done