defmodule AI.Schema do
  @moduledoc """
  Validates tool inputs against JSON schemas.
  """

  @doc """
  Validates `value` against a JSON schema and raises on errors.
  """
  def validate!(schema, value, tool_name \\ nil) do
    resolved = ExJsonSchema.Schema.resolve(schema)

    case ExJsonSchema.Validator.validate(resolved, value) do
      :ok ->
        value

      {:error, errors} ->
        raise AI.Errors.InvalidToolInputError,
          message: "invalid tool input",
          tool_name: tool_name,
          input: %{value: value, errors: errors}
    end
  end
end