defmodule GcpCompute.MixProject do
  use Mix.Project

  @version "0.3.0"
  @source_url "https://github.com/nyo16/gcp_compute"

  def project do
    [
      app: :gcp_compute,
      version: @version,
      # 1.15 is the real floor. The newest constructs in lib/ are
      # `Keyword.split/2`, `:persistent_term`, `System.monotonic_time/1` and
      # `Logger.warning/1` (all <= 1.11); the test suite's `~c"..."` sigil is the
      # only 1.15-specific thing in the repo. It is also exactly the tree floor:
      # finch (via req) itself requires ~> 1.15, so nothing below 1.15 is
      # installable regardless. The CI matrix proves the claim rather than
      # asserting it.
      elixir: "~> 1.15",
      elixirc_paths: elixirc_paths(Mix.env()),
      start_permanent: Mix.env() == :prod,
      deps: deps(),
      description: description(),
      package: package(),
      docs: docs(),
      dialyzer: dialyzer(),
      name: "GcpCompute",
      source_url: @source_url
    ]
  end

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

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

  defp deps do
    [
      {:req, "~> 0.7"},
      {:nimble_options, "~> 1.1"},
      {:telemetry, "~> 1.2"},
      # Optional: the default token provider integrates with Goth, but the
      # library never hard-depends on it — bring your own TokenProvider.
      {:goth, "~> 1.4", optional: true},
      # `lib/` never calls Jason — Req owns all JSON encode/decode, and as of
      # req 0.7.4 it still hardcodes `Jason.encode_to_iodata!/1` and
      # `Jason.decode/2`. Elixir's native `JSON` is therefore not reachable from
      # here, and the dep cannot even be scoped `only: :test`: req and goth both
      # require it non-optionally, so Mix rejects a narrower :only. Declared
      # explicitly because the test suite decodes a stubbed request body.
      {:jason, "~> 1.4"},
      {:ex_doc, "~> 0.34", only: :dev, runtime: false},
      {:credo, "~> 1.7", only: [:dev, :test], runtime: false},
      {:dialyxir, "~> 1.4", only: [:dev, :test], runtime: false}
    ]
  end

  defp dialyzer do
    [
      plt_local_path: "priv/plts",
      plt_core_path: "priv/plts",
      # CI runs dialyzer with MIX_ENV=test, which compiles `test/support`. The
      # ReqStub there calls `ExUnit.Assertions.assert/2` and `flunk/1` to enforce
      # its own invariants, and :ex_unit ships with Elixir rather than arriving as
      # a dep — so dialyxir's default app list omits it and every call resolves as
      # `unknown_function`. A MIX_ENV=dev run does not compile test/support and
      # therefore cannot catch this.
      plt_add_apps: [:ex_unit]
    ]
  end

  defp description do
    "Spawn and manage Google Compute Engine instances over the REST API, " <>
      "with pluggable auth, telemetry, and an ergonomic instance builder."
  end

  defp package do
    [
      licenses: ["MIT"],
      links: %{"GitHub" => @source_url, "Changelog" => "#{@source_url}/blob/master/CHANGELOG.md"},
      maintainers: ["niko"],
      # `guides/*.md` are ExDoc extras, so omitting them made `mix docs` fail
      # with File.Error for anyone who vendored the tarball — and hid the guides
      # from the source people inspect before adopting a 0.x library.
      files: ~w(lib guides mix.exs README.md CHANGELOG.md LICENSE .formatter.exs)
    ]
  end

  defp docs do
    [
      main: "readme",
      source_ref: "v#{@version}",
      extras: [
        "README.md",
        "guides/getting-started.md",
        "guides/configuring-machines.md",
        "guides/testing.md",
        "CHANGELOG.md"
      ],
      groups_for_extras: [
        Guides: ~r"guides/.*"
      ],
      groups_for_modules: [
        "Core API": [GcpCompute, GcpCompute.Instances, GcpCompute.Operations],
        Configuration: [GcpCompute.Config],
        Auth: [
          GcpCompute.TokenProvider,
          GcpCompute.TokenProvider.Goth,
          GcpCompute.TokenProvider.Static
        ],
        Data: [
          GcpCompute.Instance,
          GcpCompute.NetworkInterface,
          GcpCompute.Disk,
          GcpCompute.Scheduling,
          GcpCompute.Operation,
          GcpCompute.Error
        ],
        Telemetry: [GcpCompute.Telemetry]
      ]
    ]
  end
end