defmodule ToweropsWeb.WellKnownController do
  @moduledoc false

  use ToweropsWeb, :controller

  def api_catalog(conn, _params) do
    conn
    |> put_resp_content_type("application/linkset+json")
    |> json(%{
      "linkset" => [
        %{
          "anchor" => "#{base_url()}/api/v1",
          "service-doc" => [%{"href" => "#{base_url()}/docs/api"}],
          "service-desc" => [%{"href" => "#{base_url()}/docs/api", "type" => "text/html"}],
          "status" => [%{"href" => "#{base_url()}/health"}]
        }
      ]
    })
  end

  def openid_configuration(conn, _params) do
    json(conn, oauth_server_metadata())
  end

  def oauth_authorization_server(conn, _params) do
    json(conn, oauth_server_metadata())
  end

  def oauth_protected_resource(conn, _params) do
    json(conn, %{
      "resource" => "#{base_url()}/api/v1",
      "authorization_servers" => [base_url()],
      "scopes_supported" => ["read", "write"]
    })
  end

  def mcp_server_card(conn, _params) do
    json(conn, %{
      "serverInfo" => %{"name" => "TowerOps", "version" => "1.0.0"},
      "transport" => %{"endpoint" => "#{base_url()}/mcp"},
      "capabilities" => %{"tools" => %{}, "resources" => %{}, "prompts" => %{}}
    })
  end

  def agent_skills(conn, _params) do
    json(conn, %{
      "$schema" => "https://schemas.agentskills.io/discovery/0.2.0/schema.json",
      "skills" => []
    })
  end

  defp base_url, do: ToweropsWeb.Endpoint.url()

  defp oauth_server_metadata do
    %{
      "issuer" => base_url(),
      "authorization_endpoint" => "#{base_url()}/oauth/authorize",
      "token_endpoint" => "#{base_url()}/oauth/token",
      "jwks_uri" => "#{base_url()}/.well-known/jwks.json",
      "grant_types_supported" => ["authorization_code"],
      "response_types_supported" => ["code"]
    }
  end
end