#!/usr/bin/env bash
# ─────────────────────────────────────────────────────────────────────────────
# install-lnx.sh  –  Install build dependencies for polymech-cli on Linux
#
# Tested on: Ubuntu 20.04+ / Debian 11+
# Usage:     sudo bash install-lnx.sh
# ─────────────────────────────────────────────────────────────────────────────
set -euo pipefail

echo "── polymech-cli Linux dependency installer ──"

# ── 1. System packages (apt) ─────────────────────────────────────────────────
echo ""
echo "[1/3] Installing system packages via apt …"
apt-get update -qq
apt-get install -y --no-install-recommends \
    build-essential \
    gcc \
    g++ \
    git \
    libssl-dev \
    pkg-config \
    snapd

# ── 2. CMake ≥ 3.20 via snap ────────────────────────────────────────────────
#    The project requires cmake_minimum_required(VERSION 3.20).
#    Ubuntu 20.04 ships cmake 3.16, so we use the snap package instead.
echo ""
echo "[2/3] Installing CMake via snap (≥ 3.20 required) …"
if command -v /snap/bin/cmake &>/dev/null; then
    echo "  cmake snap already installed: $(/snap/bin/cmake --version | head -1)"
else
    snap install cmake --classic
    echo "  Installed: $(/snap/bin/cmake --version | head -1)"
fi

# ── 3. Node.js (for npm run build:linux) ──────────────────────────────────────
echo ""
echo "[3/3] Checking for Node.js / npm …"
if command -v node &>/dev/null; then
    echo "  node $(node --version) already installed"
else
    echo "  Node.js not found. Install via nvm or nodesource, e.g.:"
    echo "    curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash -"
    echo "    sudo apt-get install -y nodejs"
fi

# ── Summary ──────────────────────────────────────────────────────────────────
echo ""
echo "── Done! ──"
echo ""
echo "All C++ dependencies (CLI11, tomlplusplus, Catch2, asio, concurrentqueue,"
echo "taskflow, curl, lexbor, rapidjson) are fetched automatically by CMake"
echo "FetchContent at build time — no manual installation needed."
echo ""
echo "To build:"
echo "  cd $(dirname "$0")"
echo "  npm run build:linux"
echo ""
echo "The binary will be placed in: dist/polymech-cli"