#!/bin/sh

set -e
xdg_data_home=${XDG_DATA_HOME:-$HOME/.local/share}
rll=$xdg_data_home/runescape-launcher-launcher
tmpdir=$(mktemp -dt runescape-launcher-launcher.XXXXXXXXXX)
cleanup() {
    echo "cleaning up temporary directory..." >&2
    rm -rf "$tmpdir"
}
trapped="1 2 3 13 15"
for sig in $trapped; do
    trap "trap $trapped; cleanup; kill -$sig $$" $sig
done
trap 'cleanup' EXIT
if [ -f "$rll/Packages" ]; then
    echo "checking for runescape-launcher updates..."
else
    echo "downloading runescape-launcher to $rll..."
fi
curl --compressed -sSLo "$tmpdir/Packages" https://content.runescape.com/downloads/ubuntu/dists/trusty/non-free/binary-amd64/Packages
if ! cmp "$rll/Packages" "$tmpdir/Packages" 2>/dev/null; then
    ver=$(awk '$1=="Version:"{print $2}' "$tmpdir/Packages")
    if [ -f "$rll/Packages" ]; then
        echo "updating runescape-launcher..." >&2
    fi
    curl --compressed -sSLo "$tmpdir/runescape-launcher_${ver}_amd64.deb" https://content.runescape.com/downloads/ubuntu/pool/non-free/r/runescape-launcher/runescape-launcher_${ver}_amd64.deb
    sha256=$(awk '$1=="SHA256:"{print $2}' "$tmpdir/Packages")
    echo "$sha256 *$tmpdir/runescape-launcher_${ver}_amd64.deb" | sha256sum -c
    if bsdtar=$(command -v bsdtar 2>/dev/null); then
        "$bsdtar" -C "$tmpdir" -xf "$tmpdir/runescape-launcher_${ver}_amd64.deb" data.tar.xz
    elif ar=$(command -v ar 2>/dev/null); then
        "$ar" x --output "$tmpdir" "$tmpdir/runescape-launcher_${ver}_amd64.deb" data.tar.xz
    else
        echo "bsdtar or ar must be installed to extract runescape-launcher" >&2
        exit 1
    fi
    tar -C "$tmpdir" -xf "$tmpdir/data.tar.xz" ./usr/bin/runescape-launcher ./usr/share/games/runescape-launcher/runescape
    sed -e 's#/usr/share/games/runescape-launcher/#${0%/*}/#' "$tmpdir/usr/bin/runescape-launcher" > "$tmpdir/runescape-launcher"
    install -Dm644 "$tmpdir/Packages" "$rll/Packages"
    install -m755 "$tmpdir/runescape-launcher" "$tmpdir/usr/share/games/runescape-launcher/runescape" "$rll/"
else
    echo "no updates available for runescape-launcher." >&2
fi
trap $trapped
rm -rf "$tmpdir"
echo "starting runescape-launcher..." >&2
set -x
exec "$rll/runescape-launcher" "$@"