Spanish Seafood Paella

Name: Spanish Seafood Paella
Ingredients: 5 tablespoons olive oil; 1 large onion , finely chopped; 2 cloves garlic , finely chopped; 2 tomatoes , peeled, chopped; 1/2 teaspoon sugar; salt , to taste; 1 teaspoon sweet paprika (pimentón dulce); a pinch of saffron threads; 4 small cleaned squid , bodies cut into rings, tentacles left whole; 2 cups paella rice (bomba) or risotto rice (Arborio); 3 cups fish or chicken stock , plus more if needed; 1 cup dry white wine; 12 jumbo shrimp , peeled, deveined; 16 mussels scrubbed, debearded; lemon wedges