defmodule Vaccins.MixProject do
  use Mix.Project

  def project do
    [
      app: :vaccins,
      version: from_file(),
      elixir: "~> 1.7",
      elixirc_paths: elixirc_paths(Mix.env()),
      compilers: [:phoenix, :gettext] ++ Mix.compilers(),
      start_permanent: Mix.env() == :prod,
      aliases: aliases(),
      deps: deps(),
      releases: [vaccins: [steps: [:assemble, &export_sha1/1, &export_docker_image_tag/1, :tar]]]
    ]
  end

  # Configuration for the OTP application.
  #
  # Type `mix help compile.app` for more information.
  def application do
    [
      mod: {Vaccins.Application, []},
      extra_applications: [:logger, :runtime_tools]
    ]
  end

  # Specifies which paths to compile per environment.
  defp elixirc_paths(:test), do: ["config", "lib", "test/support"]
  defp elixirc_paths(_), do: ["config", "lib"]

  # Specifies your project dependencies.
  #
  # Type `mix help deps` for examples and options.
  defp deps do
    [
      {:phoenix, "> 1.5.3"},
      {:phoenix_live_view, "> 0.13.0"},
      {:phoenix_html, "> 2.11.0"},
      {:phoenix_live_reload, "> 1.2.0", only: :dev},
      {:phoenix_live_dashboard, "> 0.2.0"},
      {:telemetry_metrics, "> 0.4.0"},
      {:telemetry_poller, "> 0.4.0"},
      {:gettext, "> 0.11.0"},
      {:jason, "> 1.0.0"},
      {:plug_cowboy, "> 2.0.0"},
      {:floki, "~> 0.30.0"},
      {:finch, "~> 0.6"},
      {:ex2ms, "~> 1.0"},
      {:ecto, "~> 3.6"},
      {:phoenix_ecto, "~> 4.1"},
      {:tzdata, "~> 1.1"}
    ]
  end

  # Aliases are shortcuts or tasks specific to the current project.
  # For example, to install project dependencies and perform other setup tasks, run:
  #
  #     $ mix setup
  #
  # See the documentation for `Mix` for more info on aliases.
  defp aliases do
    [
      setup: ["deps.get", "cmd npm install --prefix assets"],
      deploy: [
        "cmd npm --prefix ./assets ci --progress=false --no-audit --loglevel=error",
        "cmd npm run --prefix ./assets deploy",
        "phx.digest",
        "release"
      ]
    ]
  end

  defp from_file(file \\ "VERSION") do
    with {:ok, described} <- File.read(file),
         {:ok, version} <- described |> String.trim() |> to_semver_string() do
      version
    end
  end

  defp to_semver_string(described) when is_binary(described) do
    with {:ok, _} <- described |> Version.parse(), do: {:ok, described}
  end

  defp export_sha1(rel) when is_struct(rel, Mix.Release) do
    with {sha1, 0} <- System.cmd("git", ["rev-parse", "HEAD"]),
         :ok <- rel |> write_in_rel_path("git-sha1", sha1),
         do: rel
  end

  defp export_docker_image_tag(rel) when is_struct(rel, Mix.Release) do
    with image_tag when not is_nil(image_tag) <- System.get_env("DOCKER_IMAGE_TAG"),
         :ok <- rel |> write_in_rel_path("docker-image-tag", image_tag) do
      rel
    else
      nil -> rel
    end
  end

  defp write_in_rel_path(%{version_path: path}, file_path, content) do
    path |> Path.join(file_path) |> File.write(content)
  end
end