defmodule WandererAppWeb.OpenAPITestGeneratorSimple do
  @moduledoc """
  Simplified OpenAPI test generator for contract validation.
  """

  alias OpenApiSpex.PathItem

  @doc """
  Generates basic contract test templates for OpenAPI operations.
  """
  def generate_basic_tests(spec) do
    spec.paths
    |> Enum.flat_map(fn {path, path_item} ->
      path_item
      |> extract_operations()
      |> Enum.map(fn {method, operation} ->
        generate_test_template(path, method, operation)
      end)
    end)
    |> Enum.join("\n\n")
  end

  defp extract_operations(%PathItem{} = path_item) do
    [
      {:get, path_item.get},
      {:post, path_item.post},
      {:put, path_item.put},
      {:patch, path_item.patch},
      {:delete, path_item.delete}
    ]
    |> Enum.filter(fn {_method, operation} -> operation != nil end)
  end

  defp generate_test_template(path, method, operation) do
    test_name = "#{String.upcase(to_string(method))} #{path}"

    """
    test "#{test_name} matches schema" do
      # TODO: Implement proper test for #{operation.operationId || "operation"}
      # This test should validate request and response against OpenAPI schema
      
      conn = build_conn()
      # Add authentication headers if needed
      # Add request body if needed
      
      conn = #{method}(conn, "#{path}")
      
      # Validate response status and schema
      assert conn.status in [200, 201, 204]
      # TODO: Add schema validation
    end
    """
  end

  @doc """
  Generates a complete test module for a specific API.
  """
  def generate_test_module(spec, module_name) do
    tests = generate_basic_tests(spec)

    """
    defmodule #{module_name}Test do
      use WandererAppWeb.ConnCase
      use WandererAppWeb.OpenAPICase
      
      describe "OpenAPI contract validation" do
        setup [:create_test_data]
        
        #{tests}
      end
      
      defp create_test_data(_) do
        # TODO: Set up test data
        %{}
      end
    end
    """
  end
end
