#!/usr/bin/env bash
# Installs the build- and run-time packages the node needs. Idempotent: apt is a
# no-op for what is already there.
#
# The set is the same across Jetson generations — only the distro release behind
# it changes (18.04 -> 22.04), and apt resolves the right versions itself. No
# GStreamer: the direct preview route encodes no video.
set -euo pipefail

here=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
eval "$("$here/detect_platform.sh")"

echo ">> Dependances pour JetPack ${JETPACK} (L4T ${L4T}, ${SOC})"

# python3 is present on every JetPack image; websockets is the only bridge dep and
# is pure Python, so it works identically everywhere. Prefer apt's package, fall
# back to pip when the distro is too old to carry it.
sudo apt-get update -qq
sudo apt-get install -y --no-install-recommends \
    build-essential cmake pkg-config \
    libusb-1.0-0-dev libudev-dev liblz4-dev libjpeg-turbo8-dev \
    python3 python3-pip

if ! python3 -c 'import websockets' 2>/dev/null; then
    echo ">> websockets absent — installation via pip"
    # 8.1 is what the Nano runs and what bridge.py was written against; anything
    # >=8 keeps the same asyncio API surface the bridge uses.
    python3 -m pip install --user "websockets>=8,<13" || \
        sudo apt-get install -y python3-websockets
fi

echo ">> Dependances OK"