#!/usr/bin/env sh
# node/install.sh — install Node.js (and with it npx) into userland.
#
# WHY: the MCP servers in mcp-config/opencode.gateway.json are npm packages and
# opencode spawns them as `npx -y <pkg>@<version>`. Without npx on PATH every
# MCP server fails to start with "command not found" — and opencode reports that
# only as a dead server, so it is easy to misread as a broken config. The MCP
# ecosystem is overwhelmingly npx-based, so this also unblocks future servers.
#
# Node is a tree (bin/node + lib/node_modules/npm), not a single binary, so it
# cannot use bin/install.sh's install_tarball_bin. It follows the ansible module
# instead: unpack under ~/.local/opt and symlink the CLIs into ~/.local/bin.
# Everything is under $HOME — no sudo, and it survives a Kasm redeploy.
set -eu

SCRIPT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
REPO_ROOT="$(dirname -- "$SCRIPT_DIR")"

# shellcheck source=../lib/fetch.sh
. "$REPO_ROOT/lib/fetch.sh"

say() { printf '%s\n' "$*" >&2; }

# Pinned LTS. Bump deliberately: npx executes whatever the registry serves, so
# the runtime is part of the supply chain that sees your Gitea/Proxmox tokens.
NODE_VERSION="v24.18.0"

PREFIX="$HOME/.local/opt/node"
BIN_DIR="$HOME/.local/bin"
NODE_CLIS="node npm npx"

case "$(fetch_arch)" in
  x86_64)  NODE_ARCH=x64 ;;
  aarch64) NODE_ARCH=arm64 ;;
  *)       say "node: unsupported arch $(fetch_arch)"; exit 1 ;;
esac

# Verify it RUNS, not just that the file exists: a Kasm redeploy can leave a
# present-but-broken tree behind (same failure the ansible venv guards against).
if [ "$("$PREFIX/bin/node" --version 2>/dev/null || true)" = "$NODE_VERSION" ]; then
  say "node $NODE_VERSION already present at $PREFIX."
else
  TARBALL="node-$NODE_VERSION-linux-$NODE_ARCH.tar.gz"
  URL="https://nodejs.org/dist/$NODE_VERSION/$TARBALL"
  TMP="$(mktemp -d)"
  say "Installing node $NODE_VERSION ($NODE_ARCH) into $PREFIX..."
  _fetch_dl "$URL" "$TMP/node.tar.gz"
  rm -rf "$PREFIX"
  mkdir -p "$PREFIX"
  # The archive has a single top-level dir; strip it so bin/ lands at $PREFIX/bin.
  tar -xzf "$TMP/node.tar.gz" -C "$PREFIX" --strip-components=1
  rm -rf "$TMP"
  say "Installed node $NODE_VERSION."
fi

# Symlink the CLIs into ~/.local/bin (on PATH via zsh/zshrc). npx must be here:
# opencode spawns MCP servers with a bare `npx`, resolved from PATH.
mkdir -p "$BIN_DIR"
for cli in $NODE_CLIS; do
  [ -x "$PREFIX/bin/$cli" ] && ln -sf "$PREFIX/bin/$cli" "$BIN_DIR/$cli"
done
say "Linked node CLIs ($NODE_CLIS) into $BIN_DIR."