#!/usr/bin/env bash

set -euo pipefail

cd "$(dirname "${BASH_SOURCE[0]}")/.."

# janky aaah
domain=$(sed -n '/^\[package\]/,/^\[/s/^name = "\(.*\)"$/\1/p' Cargo.toml)
version=$(sed -n '/^\[package\]/,/^\[/s/^version = "\(.*\)"$/\1/p' Cargo.toml)
[ -n "$domain" ] || { echo "error: could not find the package name in Cargo.toml" >&2; exit 1; }
dir=assets/translations
pot=$dir/$domain.pot

for tool in slint-tr-extractor msginit msgmerge msgcat; do
    command -v "$tool" > /dev/null || { echo "error: '$tool' is not installed, see docs/TRANSLATIONS.md" >&2; exit 1; }
done

fresh=$(mktemp)
trap 'rm -f "$fresh"' EXIT

find ui -name '*.slint' | LC_ALL=C sort | xargs slint-tr-extractor --package-name "$domain" --package-version "$version" -o "$fresh"

msgcat --no-wrap "$fresh" > /dev/null || { echo "error: the extracted template is not valid, is a translator comment longer than 76 characters?" >&2; exit 1; }

if [ -f "$pot" ] && diff -q <(grep -v '^"POT-Creation-Date:' "$pot") <(grep -v '^"POT-Creation-Date:' "$fresh") > /dev/null; then
    echo "$pot is up to date"
else
    cp "$fresh" "$pot"
    echo "updated $pot"
fi

for lang in "$@"; do
    po=$dir/$lang/LC_MESSAGES/$domain.po
    if [ -e "$po" ]; then
        echo "$po already exists" >&2
    else
        mkdir -p "$(dirname "$po")"
        msginit --no-translator --locale="$lang" --input="$pot" --output-file="$po"
    fi
done

for po in "$dir"/*/LC_MESSAGES/"$domain".po; do
    [ -e "$po" ] || continue
    msgmerge --update --backup=none --quiet "$po" "$pot"
    echo "merged into $po"
done