#!/usr/bin/env bash
# Buduje pakiet .deb dla ts3monolith w kontenerze Docker (tak samo jak
# scripts/build-deb.sh w PostfixAdminRS): zero zaleznosci na hoscie poza
# Dockerem, wersja Go dokladnie taka jak w go.mod, build w pelni offline
# (modul nie ma zadnych zewnetrznych zaleznosci).
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
OUT="$ROOT/packages"
IMAGE_BASE="${TS3MONOLITH_GO_IMAGE:-golang}"
ARCH="${DEB_ARCH:-amd64}"
TOOLCHAIN="$(sed -n 's/^go[[:space:]]*\([0-9.]*\)[[:space:]]*$/\1/p' "$ROOT/go.mod" | head -n1)"

command -v docker >/dev/null 2>&1 || { echo "error: docker is required" >&2; exit 1; }
[ -n "$TOOLCHAIN" ] || { echo "error: cannot read Go toolchain version from go.mod" >&2; exit 1; }
mkdir -p "$OUT"

IMAGE="${IMAGE_BASE}:${TOOLCHAIN}-bookworm"

printf 'Building Debian package with %s (GOARCH=%s)\n' "$IMAGE" "$ARCH"
printf 'Output: %s\n' "$OUT"

docker run --rm \
  -e CGO_ENABLED=0 \
  -e GOOS=linux \
  -e GOARCH="$ARCH" \
  -e GOFLAGS=-mod=mod \
  -v "$ROOT:/src:ro" \
  -v "$OUT:/packages" \
  -v ts3monolith-gocache:/root/.cache/go-build \
  -v ts3monolith-gomodcache:/go/pkg/mod \
  "$IMAGE" bash -euxo pipefail -c '
    rm -rf /work/ts3monolith /work/pkg
    mkdir -p /work/ts3monolith
    cp -a /src/. /work/ts3monolith/
    cd /work/ts3monolith

    gofmt -l . > /tmp/fmt.out
    if [ -s /tmp/fmt.out ]; then
      echo "gofmt: nieotypowane pliki:"; cat /tmp/fmt.out
      exit 1
    fi
    go vet ./...
    go test ./...
    go build -trimpath -buildvcs=false -ldflags="-s -w -buildid=" -o target/ts3monolith ./cmd/ts3monolith

    VERSION="$(tr -d " \t\n" < VERSION)"
    DEB_VERSION="${VERSION}"
    ARCH="'"$ARCH"'"
    PKG=/work/pkg

    install -d "$PKG/DEBIAN" "$PKG/usr/bin" "$PKG/usr/lib/ts3monolith" "$PKG/etc/default" "$PKG/lib/systemd/system" "$PKG/usr/share/doc/ts3monolith"
    install -m 0755 target/ts3monolith "$PKG/usr/bin/ts3monolith"
    install -m 0640 packaging/ts3monolith.default "$PKG/etc/default/ts3monolith"
    install -m 0644 packaging/ts3monolith.service "$PKG/lib/systemd/system/ts3monolith.service"
    install -m 0755 packaging/ts3monolith-init-rrd "$PKG/usr/lib/ts3monolith/init-rrd"
    install -m 0644 README.md "$PKG/usr/share/doc/ts3monolith/"

    cat > "$PKG/DEBIAN/control" <<CONTROL
Package: ts3monolith
Version: $DEB_VERSION
Section: net
Priority: optional
Architecture: $ARCH
Maintainer: local build <root@localhost>
Depends: adduser, passwd, rrdtool, ca-certificates
Description: Panel TeamSpeak 3 - tworzenie kanalow i statystyki RRD
 TS3 Monolith to pojedyncza aplikacja Go laczaca tworzenie kanalow
 TeamSpeak 3 na zadanie uzytkownika z historycznymi statystykami
 obecnosci (RRD). Zastepuje stary zestaw aplikacji PHP.
CONTROL

    cat > "$PKG/DEBIAN/conffiles" <<CONFFILES
/etc/default/ts3monolith
CONFFILES

    cat > "$PKG/DEBIAN/postinst" <<"POSTINST"
#!/bin/sh
set -e

if ! getent group ts3monolith >/dev/null 2>&1; then
  addgroup --system ts3monolith >/dev/null
fi
if ! getent passwd ts3monolith >/dev/null 2>&1; then
  adduser --system \
    --ingroup ts3monolith \
    --home /var/lib/ts3monolith \
    --no-create-home \
    --disabled-login \
    --shell /usr/sbin/nologin \
    ts3monolith >/dev/null
fi

install -d -o ts3monolith -g ts3monolith -m 0750 /var/lib/ts3monolith
install -d -o ts3monolith -g ts3monolith -m 0750 /var/lib/ts3monolith/graphs

if [ -f /etc/default/ts3monolith ]; then
  chown root:ts3monolith /etc/default/ts3monolith
  chmod 0640 /etc/default/ts3monolith
fi

if ! command -v rrdtool >/dev/null 2>&1; then
  echo "UWAGA: rrdtool nie jest zainstalowany - usluga sie nie uruchomi." >&2
fi

if command -v systemctl >/dev/null 2>&1; then
  systemctl daemon-reload || true
fi

cat <<MSG

ts3monolith zainstalowany.
  1. Uzupelnij sekrety:        nano /etc/default/ts3monolith
  2. Jesli nie masz archiwalnej bazy RRD, zainicjuj nowa:
                                sudo -u ts3monolith /usr/lib/ts3monolith/init-rrd
  3. Uruchom usluge:            systemctl enable --now ts3monolith
  4. Status / logi:             systemctl status ts3monolith / journalctl -u ts3monolith -f
MSG
exit 0
POSTINST
    chmod 0755 "$PKG/DEBIAN/postinst"

    cat > "$PKG/DEBIAN/prerm" <<"PRERM"
#!/bin/sh
set -e
if [ "${1:-}" = remove ] && command -v systemctl >/dev/null 2>&1; then
  systemctl stop ts3monolith.service >/dev/null 2>&1 || true
fi
exit 0
PRERM
    chmod 0755 "$PKG/DEBIAN/prerm"

    cat > "$PKG/DEBIAN/postrm" <<"POSTRM"
#!/bin/sh
set -e
if command -v systemctl >/dev/null 2>&1; then
  systemctl daemon-reload >/dev/null 2>&1 || true
fi
exit 0
POSTRM
    chmod 0755 "$PKG/DEBIAN/postrm"

    grep -qx "User=ts3monolith" "$PKG/lib/systemd/system/ts3monolith.service"
    grep -qx "Group=ts3monolith" "$PKG/lib/systemd/system/ts3monolith.service"

    dpkg-deb --root-owner-group --build "$PKG" "/packages/ts3monolith_${DEB_VERSION}_${ARCH}.deb"
    sha256sum "/packages/ts3monolith_${DEB_VERSION}_${ARCH}.deb" > "/packages/ts3monolith_${DEB_VERSION}_${ARCH}.deb.sha256"
  '

printf '\nPackages created:\n'
find "$OUT" -maxdepth 1 -type f -name 'ts3monolith_*.deb*' -printf '  %f\n' | sort