#!/usr/bin/env bash
# create-debs.sh — build the smartbotic-vectorapi + -webui .deb packages
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
SOURCE_DIR="${SOURCE_DIR:-$(cd "$SCRIPT_DIR/../.." && pwd)}"
BUILD_DIR="${BUILD_DIR:-$SOURCE_DIR/build}"
OUTPUT_DIR="${OUTPUT_DIR:-$SOURCE_DIR/dist}"
BUILD_DEB_REVISION="${BUILD_DEB_REVISION:-1}"

TEMPLATE_DIR="$SCRIPT_DIR/templates"
SCRIPTS_DIR="$SCRIPT_DIR/scripts"
SYSTEMD_DIR="$SCRIPT_DIR/systemd"
CONFIG_DIR="$SOURCE_DIR/config"
API_DIR="$SOURCE_DIR/api"
WEBUI_DIST="${WEBUI_DIST:-$BUILD_DIR/webui/dist}"

VERSION="$(cat "$SOURCE_DIR/VERSION")"
DEB_VERSION="${VERSION}-${BUILD_DEB_REVISION}"

echo "=== smartbotic-vectorapi deb builder ==="
echo "VERSION=$VERSION DEB_VERSION=$DEB_VERSION"
echo "BUILD_DIR=$BUILD_DIR OUTPUT_DIR=$OUTPUT_DIR WEBUI_DIST=$WEBUI_DIST"
mkdir -p "$OUTPUT_DIR"

calc_installed_size() {
    local staging_dir="$1" total=0
    for d in "$staging_dir"/*/; do
        [ "$(basename "$d")" = "DEBIAN" ] && continue
        total=$(( total + $(du -sk "$d" | awk '{print $1}') ))
    done
    echo "$total"
}

build_deb() {
    local pkg_name="$1" staging_dir="$2" arch="$3"
    local installed_size; installed_size="$(calc_installed_size "$staging_dir")"
    sed -i -e "s/{{VERSION}}/${DEB_VERSION}/g" -e "s/{{INSTALLED_SIZE}}/${installed_size}/g" "$staging_dir/DEBIAN/control"
    find "$staging_dir" -type d -exec chmod 0755 {} +
    find "$staging_dir/DEBIAN" -type f -exec chmod 0644 {} +
    for f in postinst prerm postrm preinst; do
        [ -f "$staging_dir/DEBIAN/$f" ] && chmod 0755 "$staging_dir/DEBIAN/$f"
    done
    local deb_file="${OUTPUT_DIR}/${pkg_name}_${DEB_VERSION}_${arch}.deb"
    dpkg-deb --build --root-owner-group "$staging_dir" "$deb_file"
    echo "  -> $deb_file"
}

# ---- Package 1: smartbotic-vectorapi (server) ----
echo "--- smartbotic-vectorapi ---"
PKG1="$(mktemp -d)"; trap 'rm -rf "$PKG1"' EXIT
mkdir -p "$PKG1/DEBIAN" "$PKG1/usr/bin" "$PKG1/etc/smartbotic-vectorapi" \
         "$PKG1/lib/systemd/system" "$PKG1/usr/share/smartbotic-vectorapi"

[ -f "$BUILD_DIR/src/smartbotic-vectorapi" ] || { echo "ERROR: binary not found at $BUILD_DIR/src/smartbotic-vectorapi" >&2; exit 1; }
cp "$BUILD_DIR/src/smartbotic-vectorapi" "$PKG1/usr/bin/smartbotic-vectorapi"
chmod 0755 "$PKG1/usr/bin/smartbotic-vectorapi"
cp "$CONFIG_DIR/config.json" "$PKG1/etc/smartbotic-vectorapi/config.json"
cp "$SYSTEMD_DIR/smartbotic-vectorapi.service" "$PKG1/lib/systemd/system/"
cp "$API_DIR/openapi.json" "$API_DIR/llms.txt" "$PKG1/usr/share/smartbotic-vectorapi/"
cp "$TEMPLATE_DIR/control.server" "$PKG1/DEBIAN/control"
cp "$SCRIPTS_DIR/server.postinst" "$PKG1/DEBIAN/postinst"
cp "$SCRIPTS_DIR/server.prerm"    "$PKG1/DEBIAN/prerm"
cp "$SCRIPTS_DIR/server.postrm"   "$PKG1/DEBIAN/postrm"
printf '/etc/smartbotic-vectorapi/config.json\n' > "$PKG1/DEBIAN/conffiles"
build_deb "smartbotic-vectorapi" "$PKG1" "amd64"

# ---- Package 2: smartbotic-vectorapi-webui (static assets) ----
echo "--- smartbotic-vectorapi-webui ---"
PKG2="$(mktemp -d)"; trap 'rm -rf "$PKG1" "$PKG2"' EXIT
mkdir -p "$PKG2/DEBIAN" "$PKG2/usr/share/smartbotic-vectorapi/webui"
if [ -d "$WEBUI_DIST" ] && [ -n "$(ls -A "$WEBUI_DIST" 2>/dev/null)" ]; then
    cp -a "$WEBUI_DIST"/. "$PKG2/usr/share/smartbotic-vectorapi/webui/"
else
    echo "ERROR: webui dist not found at $WEBUI_DIST (build with -DBUILD_WEBUI=ON)" >&2; exit 1
fi
cp "$TEMPLATE_DIR/control.webui" "$PKG2/DEBIAN/control"
build_deb "smartbotic-vectorapi-webui" "$PKG2" "all"

echo "=== Done. Packages in $OUTPUT_DIR ==="
ls -lh "$OUTPUT_DIR"/*.deb