#!/bin/sh
# Install the PSP Preservation Tool to a system prefix.
#
# FHS-friendly layout:
#   $PREFIX/bin/psp-preserve              symlink -> payload binary
#   $PREFIX/lib/psp-preserve/             app payload (binary + lib/)
#   $PREFIX/share/applications/           desktop entry
#   $PREFIX/share/icons/hicolor/256x256/apps/  app icon
#
# The PyInstaller onedir build keeps the executable and its `lib/` contents
# directory side by side, so both live under $PREFIX/lib/psp-preserve/ and a
# symlink exposes the binary at $PREFIX/bin/psp-preserve.
#
# Usage (run from inside the extracted tarball):
#   sudo ./install.sh                 # install to /usr/local (default)
#   sudo ./install.sh --prefix=/usr   # install to /usr
#   sudo ./install.sh --uninstall     # remove from the default prefix
set -eu

PREFIX=/usr/local
MODE=install

for arg in "$@"; do
    case "$arg" in
        --prefix=*) PREFIX=${arg#--prefix=} ;;
        --uninstall) MODE=uninstall ;;
        *) echo "unknown argument: $arg" >&2; exit 2 ;;
    esac
done

SRC_DIR=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
LIBDIR="$PREFIX/lib/psp-preserve"
BINDIR="$PREFIX/bin"
APPDIR="$PREFIX/share/applications"
ICONDIR="$PREFIX/share/icons/hicolor/256x256/apps"
APP_BIN="$LIBDIR/psp-preserve"

require_root() {
    if [ "$(id -u)" -ne 0 ]; then
        echo "run as root (e.g. sudo)" >&2
        exit 1
    fi
}

uninstall() {
    rm -f "$BINDIR/psp-preserve"
    rm -f "$APPDIR/psp-preserve.desktop"
    rm -f "$ICONDIR/psp-preserve.png"
    rm -rf "$LIBDIR"
    echo "Uninstalled from $PREFIX"
}

if [ "$MODE" = uninstall ]; then
    require_root
    uninstall
    exit 0
fi

require_root

# The tarball ships these next to this script.
for f in psp-preserve lib psp-preserve.desktop app-icon.png; do
    if [ ! -e "$SRC_DIR/$f" ]; then
        echo "missing $f (run install.sh from inside the extracted tarball)" >&2
        exit 1
    fi
done

mkdir -p "$LIBDIR" "$BINDIR" "$APPDIR" "$ICONDIR"
rm -rf "$LIBDIR"
mkdir -p "$LIBDIR"
cp -a "$SRC_DIR/psp-preserve" "$LIBDIR/psp-preserve"
cp -a "$SRC_DIR/lib" "$LIBDIR/lib"
install -m 0644 "$SRC_DIR/psp-preserve.desktop" "$APPDIR/psp-preserve.desktop"
install -m 0644 "$SRC_DIR/app-icon.png" "$ICONDIR/psp-preserve.png"
ln -sfn "$APP_BIN" "$BINDIR/psp-preserve"

echo "Installed to $PREFIX"
echo "  binary:  $BINDIR/psp-preserve -> $APP_BIN"
echo "  payload: $LIBDIR"
echo "  desktop: $APPDIR/psp-preserve.desktop"