Type 1 diabetes diet should consist of what foods?

Long answer. That would take pages to answer. See your doctor and ask to see a diabetes educator asap. It is vital for your health and life.
Moderation in carbs. People with t1 diabetes take Insulin to avoid post-meal blood glucose spikes (resulting from carb intake). Thus, most diabetes experts suggest using lower glycemic index carbs (such as higher fiber content grains), with amounts in moderation (40-50% of total daily caloric intake). Examples of such are: whole grains (not processed grains), whole fruit (not juice), brown rice (not white) etc...