#! /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