#!/bin/bash
#
# Gradi guacd image s dodanim hrvatskim rasporedom tipkovnice.
#
# Rasporedi se kompajliraju u libguac-client-rdp, pa se ne mogu dodati
# naknadno — guacd se mora ponovno prevesti. Skripta namjerno koristi
# Dockerfile koji dolazi uz sluzbeni izvor tražene verzije umjesto da
# recepturu prepisuje, da nadogradnja na novi Guacamole ne trazi
# odrzavanje ovdje.
#
#   ./build.sh [verzija]      npr. ./build.sh 1.7.0
#
set -euo pipefail

GUAC_VERSION="${1:-1.6.0}"
IMAGE="guacd:${GUAC_VERSION}-hr"
KEYMAP="hr_hr_qwertz.keymap"
SRC_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"

[[ -f "${SRC_DIR}/${KEYMAP}" ]] || { echo "Nedostaje ${KEYMAP}" >&2; exit 1; }
command -v docker >/dev/null || { echo "Docker nije pronaden" >&2; exit 1; }

WORK=$(mktemp -d)
trap 'rm -rf "$WORK"' EXIT

echo "==> Preuzimanje izvora guacamole-server ${GUAC_VERSION}"
TARBALL="guacamole-server-${GUAC_VERSION}.tar.gz"
for base in "https://downloads.apache.org/guacamole" \
            "https://archive.apache.org/dist/guacamole"; do
    if curl -fsSL -o "${WORK}/${TARBALL}" \
        "${base}/${GUAC_VERSION}/source/${TARBALL}"; then
        break
    fi
done
[[ -s "${WORK}/${TARBALL}" ]] || { echo "Izvor ${GUAC_VERSION} nije pronaden" >&2; exit 1; }

tar -xzf "${WORK}/${TARBALL}" -C "$WORK"
BUILD_CTX="${WORK}/guacamole-server-${GUAC_VERSION}"
[[ -f "${BUILD_CTX}/Dockerfile" ]] || { echo "Izvor nema Dockerfile" >&2; exit 1; }

echo "==> Ugradnja ${KEYMAP}"
cp "${SRC_DIR}/${KEYMAP}" "${BUILD_CTX}/src/protocols/rdp/keymaps/"

# Keymap mora biti naveden u rdp_keymaps, inace ga generate.pl preskoci.
MAKEFILE="${BUILD_CTX}/src/protocols/rdp/Makefile.am"
grep -q "$KEYMAP" "$MAKEFILE" || \
    sed -i "s|\(\$(srcdir)/keymaps/en_us_qwerty.keymap[[:space:]]*\\\\\)|\1\n    \$(srcdir)/keymaps/${KEYMAP}    \\\\|" "$MAKEFILE"
grep -q "$KEYMAP" "$MAKEFILE" || { echo "Ubacivanje u Makefile.am nije uspjelo" >&2; exit 1; }

echo "==> Gradnja ${IMAGE} (dugotrajno, gradi se i FreeRDP)"
# Upstream Dockerfile ovisnosti gradi iz gita i bira NAJNOVIJI tag koji
# odgovara regexu. Kako te biblioteke izlaze, gradnja pukne sama od sebe
# iako se nista nije promijenilo kod nas:
#   - libwebsockets v5 trazi GnuTLS kojeg build okruzenje 1.6.0 nema
#   - FreeRDP 2.x je odmakao na razvojne tagove koje configure odbija
# Zato su zakljucani na ono sto nosi sluzbeni guacd:1.6.0 image.
# Za drugu verziju Guacamolea po potrebi pregazi preko env varijabli.
docker build \
    --build-arg BUILD_JOBS="$(nproc)" \
    --build-arg WITH_LIBWEBSOCKETS="${WITH_LIBWEBSOCKETS:-v4(\\.\\d+)+}" \
    --build-arg WITH_FREERDP="${WITH_FREERDP:-2\\.11\\.7}" \
    -t "$IMAGE" "$BUILD_CTX"

echo "==> Provjera da je raspored u imageu"
if docker run --rm --entrypoint sh "$IMAGE" -c \
    'strings /opt/guacamole/lib/libguac-client-rdp.so.0.0.0 | grep -qx hr-hr-qwertz'; then
    echo "OK — ${IMAGE} sadrzi hr-hr-qwertz"
else
    echo "GRESKA: raspored nije zavrsio u imageu" >&2
    exit 1
fi

cat <<MSG

Gotovo. U /opt/guacamole/docker-compose.yml zamijenite guacd image s:

    image: ${IMAGE}

pa "docker compose up -d guacd". Zatim na konekciji postavite
server-layout = hr-hr-qwertz
MSG