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#! /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_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

STR_TEST_DASHED=$(echo "${OPT_NAME:-$OPT_LANG}" | sed -e 's/\//-/g')

clean_exit() {
    rc=$?;
    trap - SIGINT SIGTERM SIGABRT EXIT
    echo "Run test $OPT_LANG: done. Test's exit code: $rc"
    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 "WARN" "$log_file_path"; then
	status="ERROR"
    elif grep -q "FAIL" "$log_file_path"; then
	status="FAIL"
    elif grep -q "PASS" "$log_file_path"; then
	status="PASS"
    else
	status="ERROR"
    fi
    echo "$status $OPT_LANG" >> "$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"
    printf '%s\n' '' \
	   "- test: $OPT_LANG" \
	   "  result: $result" \
	   "  logs:" \
	   "  - ${status}_${log_file_name}" \
	   >> "$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="$OPT_ARTIFACTS_DIR/$STR_TEST_DASHED.log"
logfile="$(realpath "$logfile")"
exec > >(tee -a "$logfile") 2>&1

expand_regex() {
    local p ret=()
    local regex="$1"
    shift
    debug "Expanding $regex"
    for p; do
	set +f
	debug "$p: $regex"
	 (cd $p;
	  local x=$(find -regextype posix-egrep -regex "./$regex" -print|sed -e 's,^\./,,g')
	  debug "$x"
	  ret+=($x)
	  set -f
	  echo -n ${ret[@]}
	 )
    done
    echo -n ${ret[@]}
}

iv=()
ev=()
x=()
for p in ${OPT_INCLUDE[@]}; do
    x=$(expand_regex $p ${OPT_PATH[@]})
    if [ "x$x" == "x" ]; then
	echo "RESULT: WARN: No matches on \"$p\". maybe typo or something changed?"
	continue
    fi
    iv=("${iv[@]}" "${x[@]}")
done
for p in ${OPT_EXCLUDE[@]}; do
    x=$(expand_regex $p ${OPT_PATH[@]})
    if [ "x$x" == "x" ]; then
	echo "RESULT: WARN: No matches on \"$p\". maybe typo or something changed?"
	continue
    fi
    ev=("${ev[@]}" "${x[@]}")
done
OPT_EXCLUDE=(${ev[@]})
OPT_INCLUDE=(${iv[@]})

debug "Path: ${OPT_PATH[@]}"
debug "Lang: $OPT_LANG"
debug "Artifacts dir: $OPT_ARTIFACTS_DIR"
debug "Exclude: ${#OPT_EXCLUDE[@]}: ${OPT_EXCLUDE[@]}"
debug "Include: ${#OPT_INCLUDE[@]}: ${OPT_INCLUDE[@]}"

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

debug "Check language coverage"
ret=0
set +f
for p in ${OPT_PATH[@]}; do
    for i in `find $p -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
		NOT_MATCHED=("${NOT_MATCHED[@]/$n}")
	    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."
		ret=1
	    else
		echo "RESULT: PASS: $i satisfy $OPT_LANG language coverage."
	    fi
	fi
    done
done

exit $ret