Shrimp and Okra Gumbo

Name: Shrimp and Okra Gumbo
Ingredients: 1/2 cup oil; 1/2 cup flour; 1 cup onion (diced); 1 cup celery (diced); 1 cup green pepper (diced); 3 cloves garlic (chopped); 1 pound okra (trimmed and cut into 1/4 inch slices); 4 cups shrimp stock; 1 (14 ounce) can whole tomatoes (chopped); 1 teaspoon paprika; 1/2 teaspoon cayenne pepper (or to taste); 1 teaspoon oregano; 1 teaspoon thyme; 2 bay leaves; salt and pepper to taste; 1 pound shrimp (shelled and deveined, save those shells for shrimp stock); 1 bunch green onions (sliced); 1 handful parsley (chopped)