defmodule ServerWeb.HealthController do
  use ServerWeb, :controller

  @moduledoc """
  Public health check for uptime monitors.
  Returns 200 when the process is up AND SQLite is reachable, 503 otherwise.
  """

  def show(conn, _params) do
    case probe_db() do
      :ok ->
        json(conn, %{
          status: "ok",
          version: Application.spec(:server, :vsn) |> to_string(),
          db: "ok"
        })

      {:error, reason} ->
        conn
        |> put_status(:service_unavailable)
        |> json(%{status: "degraded", db: "error", reason: inspect(reason)})
    end
  end

  defp probe_db do
    try do
      case Ecto.Adapters.SQL.query(Server.Repo, "SELECT 1", []) do
        {:ok, _} -> :ok
        {:error, e} -> {:error, e}
      end
    rescue
      e -> {:error, e}
    end
  end
end