#!/bin/sh

set -x

APP=/Applications/NetBird.app
AGENT=/usr/local/bin/netbird
LOG_FILE=/var/log/netbird/client_post_install.log
FRESH_INSTALL_MARKER_DIR="/Library/Application Support/NetBird"
FRESH_INSTALL_MARKER="$FRESH_INSTALL_MARKER_DIR/.fresh-install"

mkdir -p /var/log/netbird/
mkdir -p /usr/local/bin/

{
    echo "Installing NetBird..."

    # Fresh-vs-upgrade detection: the pkg receipt of a previous install is
    # still present while this script runs, so a receipt means upgrade. Only
    # a true fresh install gets the breadcrumb the GUI uses to enable
    # launch-on-login by default; the installer itself never writes login
    # items. On upgrade any stale breadcrumb is removed (covers a fresh
    # install where the GUI never launched before the first update).
    IS_UPGRADE="false"
    if [ -n "${INSTALL_PKG_SESSION_ID:-}" ] && pkgutil --pkg-info "${INSTALL_PKG_SESSION_ID}" > /dev/null 2>&1; then
        IS_UPGRADE="true"
    fi
    if [ "$IS_UPGRADE" = "true" ]; then
        echo "Upgrade detected (receipt for ${INSTALL_PKG_SESSION_ID} present), removing stale fresh-install marker."
        rm -f "$FRESH_INSTALL_MARKER"
    else
        echo "Fresh install detected, writing fresh-install marker."
        mkdir -p "$FRESH_INSTALL_MARKER_DIR"
        touch "$FRESH_INSTALL_MARKER"
    fi

    if test -d $APP; then
        echo "NetBird app copied successfully."
    else
        echo "NetBird app could not be copied to the Applications folder."
        exit 1
    fi

    ln -fs $APP/Contents/MacOS/netbird $AGENT
    if test -f $AGENT; then
        echo "NetBird binary linked successfully."
    else
        echo "NetBird could not create symlink to /usr/local/bin"
        exit 1
    fi

    $AGENT service install || true
    $AGENT service start || true

    # On upgrade the GUI relaunch carries --post-update so its first-run
    # autostart default cannot fire (belt-and-suspenders on top of the
    # absent breadcrumb).
    if [ "$IS_UPGRADE" = "true" ]; then
        open $APP --args --post-update
    else
        open $APP
    fi

    echo "Finished Netbird installation successfully"
    exit 0 # all good
} &> $LOG_FILE