Blackberry Cran-Apple Crumble

Blackberry Cran-Apple Crumble
I came up with this recipe in the Autumn, but this would be a perfect warming winter treat, especially for a snow day!
Filling
1 1/2 cup fresh dates
Juice from one lemon
Juice from one orange
1 tsp cinnamon
1 tsp allspice
1 tablespoon arrowroot powder
⅛-¼ cup water
1 tsp orange zest
6 oz. package of fresh blackberries
½ cup fresh cranberries
5 apples (choose one or two varieties of sweet local apples)
Topping
¼ cup date mixture from filling recipe
1 cup old-fashioned oats (get gluten-free if there is an allergy)
1 cup almond flour