What will be the basis of foreign relations under Khilafah state?

Recent examples of Afghanistan have shown a lack of political thinking. We seem to equate an Islamic state with a state that wages war on the world. The basis of foreign relations will be Islam and the invitation to Islam. The Khaleefah is the one who will allow trade agreements, diplomatic relations and treaties according to Islam. The Khilafah does not seek to live in a bubble but to have normal relations with other nations for the benefit of the state and it’s citizens. The Khilafah will buy and sell from other nations, attend international conferences and summits and partake in international norms. All of these relationships however will based upon the Islamic Shariah and no action can be partaken by that state that violates it. Abiding by the Shariah on the global stage is an ideal opportunity to show the justice of Islam to the world, in stark contrast to the conniving tricks and double standards the world is put under by the colonial, capitalist nations that seek to rape the world for the benefit of corporations and powerful individuals. In addition, the Muslim Ummah as a whole has a duty to mankind in general: to enjoin good and forbid evil, and to be the Ummatan Wasata – a just, middle Ummah – to witness over mankind according to this justice. Accordingly the Khaleefah, as the representative ruler of the Muslims, has the duty to be interested and involved in global affairs, to speak out against injustices and invite other nations to behave according to what is good and just, and to invite them to Islam.