let
  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/tarball/nixos-25.11";
  pkgs = import nixpkgs { config = {}; overlays = []; };
in

pkgs.mkShellNoCC {
  packages = with pkgs; [
    ruby_3_3
    go-task
    docker
    docker-compose
    libyaml
    pkg-config
    gcc
    gnumake
    libffi
    openssl
    zlib
    postgresql_16
  ];

  shellHook = ''
    export PATH="$HOME/.local/share/gem/ruby/3.3.0/bin:$PATH"
    export GEM_HOME="$HOME/.local/share/gem/ruby/3.3.0"
    export BUNDLE_PATH="$HOME/.local/share/gem/ruby/3.3.0"
    echo "TurboVault dev environment loaded!"
    echo "  Ruby: $(ruby --version)"
    echo "  Task: $(task --version 2>/dev/null || echo 'not available')"
    echo "  Rails: $(rails --version 2>/dev/null || echo 'not installed — run: bundle install')"
    echo ""
    echo "Quick start:"
    echo "  task setup   # One-command setup (Docker + gems + database)"
    echo "  task server  # Start Rails server"
    echo "  task         # Show all available tasks"
  '';
}