#!/usr/bin/env bash
# Deklarix — .deb-Pakete bauen (amd64 + arm64)
#
# Verwendung:
#   ./scripts/build.sh [version]          # Beide Architekturen
#   ./scripts/build.sh [version] amd64    # Nur amd64
#   ./scripts/build.sh [version] arm64    # Nur arm64
#
# Ausgabe: dist/deklarix_<version>_<arch>.deb

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
REPO_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
PACKAGING_DIR="$REPO_DIR/packaging"
BUILD_DIR="$REPO_DIR/dist/build"
VERSION="${1:-0.0.1}"
ARCH_FILTER="${2:-both}"

GRN='\033[0;32m'; BLD='\033[1m'; NC='\033[0m'
log() { echo -e "${GRN}[build]${NC} $*"; }

export PATH=$PATH:/usr/local/go/bin

command -v go       >/dev/null || { echo "Go nicht gefunden — PATH: $PATH"; exit 1; }
command -v dpkg-deb >/dev/null || { echo "dpkg-deb nicht gefunden"; exit 1; }

log "Version: $VERSION  |  Go: $(go version)"

ARCHS=()
case "$ARCH_FILTER" in
    amd64) ARCHS=("amd64") ;;
    arm64) ARCHS=("arm64") ;;
    *)     ARCHS=("amd64" "arm64") ;;
esac

rm -rf "$BUILD_DIR"
mkdir -p "$REPO_DIR/dist"

for ARCH in "${ARCHS[@]}"; do
    DEB_NAME="deklarix_${VERSION}_${ARCH}"
    DEB_DIR="$BUILD_DIR/$DEB_NAME"

    log "Baue Binary ($ARCH)..."
    mkdir -p "$DEB_DIR/DEBIAN" \
             "$DEB_DIR/usr/bin" \
             "$DEB_DIR/etc/systemd/system" \
             "$DEB_DIR/etc/deklarix"
    CGO_ENABLED=0 GOARCH=$ARCH GOOS=linux go build \
        -trimpath -ldflags="-X main.Version=${VERSION} -s -w" \
        -o "$DEB_DIR/usr/bin/deklarix" \
        ./cmd/deklarix/
    chmod 755 "$DEB_DIR/usr/bin/deklarix"

    log "Stelle Paket zusammen ($ARCH)..."
    sed "s/^Version: VERSION/Version: $VERSION/; s/^Architecture: ARCH/Architecture: $ARCH/" \
        "$PACKAGING_DIR/DEBIAN/control.tmpl" > "$DEB_DIR/DEBIAN/control"
    cp "$PACKAGING_DIR/DEBIAN/postinst"  "$DEB_DIR/DEBIAN/postinst"
    cp "$PACKAGING_DIR/DEBIAN/prerm"     "$DEB_DIR/DEBIAN/prerm"
    cp "$PACKAGING_DIR/DEBIAN/conffiles" "$DEB_DIR/DEBIAN/conffiles"
    chmod 755 "$DEB_DIR/DEBIAN/postinst" "$DEB_DIR/DEBIAN/prerm"

    cp "$PACKAGING_DIR/etc/systemd/system/deklarix.service" "$DEB_DIR/etc/systemd/system/"
    cp "$PACKAGING_DIR/etc/deklarix/deklarix.env.example"   "$DEB_DIR/etc/deklarix/"

    dpkg-deb --build --root-owner-group "$DEB_DIR" "$REPO_DIR/dist/$DEB_NAME.deb"

    log "$ARCH fertig: dist/$DEB_NAME.deb ($(du -sh "$REPO_DIR/dist/$DEB_NAME.deb" | cut -f1))"
done

rm -rf "$BUILD_DIR"

log "Build abgeschlossen ✓"