#!/bin/sh
# mkdeb - build a Terminal-compatible .deb package and add it to the local repo
# Usage: mkdeb <name> <version> <payload-dir> [architecture]
# The payload directory is copied to the prefix root; put files under
# bin/, usr/bin/, lib/, share/, etc.  Maintainer scripts may be placed in
# <payload-dir>/DEBIAN/{preinst,postinst,prerm,postrm}.

ROOT="${TERM_ROOT:-$HOME/Documents/.terminal}"
NAME="${1:-}"
VERSION="${2:-}"
PAYLOAD="${3:-}"
ARCH="${4:-iphoneos-arm64}"
MAINTAINER="${MKDEB_MAINTAINER:-Terminal User <mobile@localhost>}"
DESCRIPTION="${MKDEB_DESCRIPTION:-$NAME plugin for Terminal}"

usage() {
    echo "usage: mkdeb <name> <version> <payload-dir> [architecture]" >&2
    echo "  architecture: iphoneos-arm64 (default), all, darwin-arm64" >&2
    exit 2
}

[ -n "$NAME" ] && [ -n "$VERSION" ] && [ -n "$PAYLOAD" ] || usage
[ -d "$PAYLOAD" ] || { echo "mkdeb: payload directory not found: $PAYLOAD" >&2; exit 1; }
case "$NAME" in
    *[!A-Za-z0-9+.-]*|"") echo "mkdeb: invalid package name: $NAME" >&2; exit 1 ;;
esac

echo "mkdeb: start $NAME $VERSION"
mkdir -p "$ROOT/repo/pool" "$ROOT/tmp" "$ROOT/var/lib/dpkg/info"
DEB="$ROOT/repo/pool/${NAME}_${VERSION}_${ARCH}.deb"
if python3 -c 'pass' >/dev/null 2>&1 && [ -f "$APPDIR/bin/pkgtool" ]; then
    MKDEB_MAINTAINER="$MAINTAINER" MKDEB_DESCRIPTION="$DESCRIPTION" \
        python3 "$APPDIR/bin/pkgtool" build "$DEB" "$NAME" "$VERSION" "$ARCH" "$PAYLOAD" "${MKDEB_DEPENDS:-}"
    exit $?
fi
TMP="$ROOT/tmp/mkdeb.$$"
rm -rf "$TMP"
mkdir -p "$TMP/DEBIAN"

# Control file.
{
    echo "Package: $NAME"
    echo "Version: $VERSION"
    echo "Architecture: $ARCH"
    echo "Maintainer: $MAINTAINER"
    echo "Section: plugins"
    echo "Priority: optional"
    echo "Description: $DESCRIPTION"
    [ -n "${MKDEB_DEPENDS:-}" ] && echo "Depends: $MKDEB_DEPENDS"
} > "$TMP/DEBIAN/control"

# Optional maintainer scripts from the payload's DEBIAN directory.
for script in preinst postinst prerm postrm; do
    if [ -f "$PAYLOAD/DEBIAN/$script" ]; then
        cp "$PAYLOAD/DEBIAN/$script" "$TMP/DEBIAN/$script"
        chmod +x "$TMP/DEBIAN/$script"
    fi
done

# Build the two tar archives.  Copy the payload first (no shell pipeline;
# nested tar pipelines can stall inside a-Shell's in-process command model).
DATA_TMP="$TMP/data"
mkdir -p "$DATA_TMP"
echo "mkdeb: copying payload..."
cp -R "$PAYLOAD"/. "$DATA_TMP"/ 2>/dev/null
rm -rf "$DATA_TMP/DEBIAN"
echo "mkdeb: writing data archive..."
tar -czf "$TMP/data.tar.gz" -C "$DATA_TMP" .
echo "mkdeb: writing control archive..."
tar -czf "$TMP/control.tar.gz" -C "$TMP" DEBIAN
printf '2.0\n' > "$TMP/debian-binary"

DEB="$ROOT/repo/pool/${NAME}_${VERSION}_${ARCH}.deb"
rm -f "$DEB"
echo "mkdeb: writing ar archive..."
rm -f "$DEB"
tar --format=ar -cf "$DEB" -C "$TMP" debian-binary control.tar.gz data.tar.gz >/dev/null 2>&1
if [ ! -s "$DEB" ]; then
    echo "mkdeb: tar ar writer unavailable; trying Python fallback..." >&2
    if python3 -c 'pass' >/dev/null 2>&1 && [ -f "$APPDIR/bin/ardeb" ]; then
        python3 "$APPDIR/bin/ardeb" pack "$DEB" "$TMP/debian-binary" "$TMP/control.tar.gz" "$TMP/data.tar.gz"
    fi
fi
if [ ! -s "$DEB" ]; then
    echo "mkdeb: failed to create $DEB" >&2
    rm -rf "$TMP"
    exit 1
fi

# Update Packages: append the new package stanza.
SIZE=$(wc -c < "$DEB" | tr -d ' ')
PACKAGES="$ROOT/repo/Packages"
touch "$PACKAGES"
{
    echo "Package: $NAME"
    echo "Version: $VERSION"
    echo "Architecture: $ARCH"
    echo "Maintainer: $MAINTAINER"
    echo "Section: plugins"
    echo "Priority: optional"
    echo "Filename: pool/$(basename "$DEB")"
    echo "Size: $SIZE"
    echo "Description: $DESCRIPTION"
    [ -n "${MKDEB_DEPENDS:-}" ] && echo "Depends: $MKDEB_DEPENDS"
    echo ""
} >> "$PACKAGES"

rm -rf "$TMP"
echo "$DEB"