#!/bin/sh
set -eu

. aux/lib.sh

sort_dicts() {
	for f in po/spelling/*.txt; do
		if ! LANG=POSIX sort "$f" | diff - "$f"; then
			if [ "$IN_PLACE" = true ]; then
				OUT="$(mkstemp)"
				LANG=POSIX sort "$f" | uniq > "$OUT"
				mv "$OUT" "$f"
			else
				echo "The $f dictionary is unsorted. To fix it, run:" >&2
				echo "	sh aux/workflow/assert-spelling.sh -i" >&2
				exit 1
			fi
		fi
	done
}

IN_PLACE=false
while getopts 'l:i' flag; do
	case "$flag" in
		l)
			LANGS="$OPTARG"
			;;
		i)
			IN_PLACE=true
			sort_dicts
			exit
			;;
		*)
			exit 2
			;;
	esac
done
shift $((OPTIND -1))

assert_arg() {
	if [ -z "$1" ]; then
		echo "Missing $2" >&2
		exit 2
	fi
}

assert_arg "${LANGS:-}" '-l LANGS'

mkdir -p po/spelling
eval "touch po/spelling/{international,$(echo "$LANGS" | tr ' ' ,)}.txt"

get_lang() {
	grep lang=.. "$1" | \
		head -n1 | \
		awk '
			match($0, /lang="(..)"/) {
				print substr($0, RSTART+length("lang=\""), 2)
			}
		'
}

ACC="$(mkstemp)"
for f in "$@"; do
	l="$(get_lang "$f")"
	CURR_DICT="$(mkstemp)"
	cat po/spelling/international.txt "po/spelling/$l.txt" | sort | uniq > "$CURR_DICT"
	hunspell -u3 -H -d "$l" -p "$CURR_DICT" "$f" | tee -a "$ACC" >&2
done

if [ -s "$ACC" ]; then
	printf '\n\tMispelled words detected by hunspell above.\n\n' >&2
	exit 1
fi

sort_dicts