defmodule Modkit.MixProject do
  use Mix.Project

  def project do
    [
      app: :modkit,
      version: "0.10.0",
      description: "A set of tool to work with Elixir modules files.",
      elixir: "~> 1.13",
      consolidate_protocols: Mix.env() != :test,
      elixirc_paths: elixirc_paths(Mix.env()),
      start_permanent: Mix.env() == :prod,
      deps: deps(),
      docs: docs(),
      package: package(),
      modkit: modkit(),
      dialyzer: dialyzer(),
      versioning: versioning(),
      source_url: "https://github.com/lud/modkit"
    ]
  end

  defp elixirc_paths(:prod) do
    ["lib"]
  end

  defp elixirc_paths(_) do
    ["lib", "test/support"]
  end

  def application do
    [
      extra_applications: [:logger]
    ]
  end

  defp deps do
    [
      {:cli_mate, "~> 0.10", runtime: false, only: [:dev, :test]},
      {:libdev, ">= 0.0.0", only: [:dev, :test], runtime: false},
      {:readmix, ">= 0.0.0", only: [:dev, :test], runtime: false}
    ]
  end

  defp docs do
    [
      filter_modules: fn mod, _ -> "Sample" not in Module.split(mod) end
    ]
  end

  defp package do
    [
      licenses: ["MIT"],
      files: ~w(lib mix.exs README* LICENSE* CHANGELOG*),
      links: %{
        "Github" => "https://github.com/lud/modkit"
      }
    ]
  end

  defp modkit do
    [
      mount: [
        {Modkit, "lib/modkit"},
        {Modkit.Support, "test/support"},
        {Mix.Tasks, "lib/mix/tasks", flavor: :mix_task},
        {Samples, :ignore}
      ]
    ]
  end

  defp versioning do
    [
      before_commit: [
        &readmix/1,
        {:add, "README.md"},
        &gen_changelog/2,
        {:add, "CHANGELOG.md"}
      ]
    ]
  end

  def readmix(vsn) do
    rdmx = Readmix.new(vars: %{app_vsn: vsn})
    :ok = Readmix.update_file(rdmx, "README.md")
  end

  defp gen_changelog(vsn, info) do
    args = ["cliff", "--tag", vsn, "--with-tag-message", info.annotation, "-o", "CHANGELOG.md"]

    case System.cmd("git", args, stderr_to_stdout: true) do
      {_, 0} -> IO.puts("Updated CHANGELOG.md with #{vsn}")
      {out, _} -> {:error, "Could not update CHANGELOG.md:\n\n #{out}"}
    end
  end

  defp dialyzer do
    [
      flags: [:unmatched_returns, :error_handling, :unknown, :extra_return],
      list_unused_filters: true,
      plt_add_apps: [:mix, :eex],
      plt_local_path: "_build/plts"
    ]
  end

  def cli do
    [
      preferred_envs: [dialyzer: :test]
    ]
  end
end