Plant sugars created by photosynthesis are simple sugars. The most common is sucrose.
Monosaccharides like xylose and xylulose are often fed to plants too. Those are simple sugars too and are used in photosynthesis.
Consuming marijuana plants either green or cooked should be safe for a diabetic person as sucrose does not change your metabolic control but there are other diet factors that matter like fiber so please consult your primary doctor.