if :os.type() == {:unix, :darwin} do
  brew_prefix = fn pkg, default ->
    case System.cmd("brew", ["--prefix", pkg], stderr_to_stdout: true) do
      {path, 0} -> String.trim(path)
      _ -> default
    end
  end

  openssl = brew_prefix.("openssl@3", brew_prefix.("openssl", "/opt/homebrew/opt/openssl@3"))
  libyaml = brew_prefix.("libyaml", "/opt/homebrew/opt/libyaml")

  add_env = fn var, val ->
    old = System.get_env(var) || ""
    if not String.contains?(old, val) do
      new_val = if old == "", do: val, else: val <> " " <> old
      System.put_env(var, new_val)
    end
  end

  add_path = fn var, val ->
    old = System.get_env(var) || ""
    if not String.contains?(old, val) do
      new_val = if old == "", do: val, else: val <> ":" <> old
      System.put_env(var, new_val)
    end
  end

  add_env.("CFLAGS", "-I#{openssl}/include -I#{libyaml}/include")
  add_env.("CPPFLAGS", "-I#{openssl}/include -I#{libyaml}/include")
  add_env.("LDFLAGS", "-L#{openssl}/lib -L#{libyaml}/lib")
  add_path.("PKG_CONFIG_PATH", "#{openssl}/lib/pkgconfig")
  add_path.("PKG_CONFIG_PATH", "#{libyaml}/lib/pkgconfig")
end

defmodule TURN.Mixfile do
  use Mix.Project

  def project() do
    [
      app: :turn,
      version: "0.7.23",
      description: "ERP/1 STUN/TURN Server",
      package: package(),
      deps: deps()
    ]
  end

  def package do
    [
      files: ~w(config include src mix.exs rebar.config LICENSE NOTICE README.md),
      licenses: ["Apache-2.0"],
      maintainers: ["Namdak Tonpa"],
      name: :turn,
      links: %{"GitHub" => "https://github.com/erpuno/turn"}
    ]
  end

  def application() do
    [ mod: {:eturnal_app, []},
      extra_applications: [:public_key, :conf, :stun, :influx_udp]
    ]
  end

  def deps() do
    [ {:ex_doc, "~> 0.11", only: :dev},
      {:conf, "~> 0.2.6"},
      {:influx_udp, "~> 1.1.1"},
      {:stun, "~> 1.2.10"}
    ]
  end
end