-- SPDX-FileCopyrightText: © 2026 Vladimir Zorin <vladimir@deviant.guru>
-- SPDX-License-Identifier: LicenseRef-OWL-1.0-or-later
-- Licensed under OWL v1.0+. See LICENSE.

local json = require("cjson.safe")

local M = {}

local stringify_output = function(output)
	if type(output) == "string" then
		return output
	end
	if output == nil then
		return ""
	end

	local ok, encoded = pcall(json.encode, output)
	if ok and encoded then
		return encoded
	end

	return tostring(output)
end

function M.build_tool_result_message(call_id, output)
	return {
		role = "tool",
		tool_call_id = call_id,
		content = stringify_output(output),
	}
end

return M