Pineapple Chicken Enchiladas

Name: Pineapple Chicken Enchiladas
Ingredients: 2 tablespoons extra-virgin olive oil; 1 small yellow onion, chopped; 2 cloves garlic, minced; 1 jalapeño, seeded and chopped; 1 tablespoon chili powder; 1 teaspoon cumin; Pinch of crushed red pepper; 1 teaspoon smoked paprika; 1/2 teaspoon dried Mexican oregano; 1 teaspoon sugar; Kosher salt; Fresh ground black pepper; One 28-ounce can diced tomatoes; 1 pound boneless skinless chicken breast; 1 (14-ounce) can chopped pineapple; 8 (8-inch) corn or flour tortillas; 4 ounces shredded sharp cheddar or Monterey jack cheese (about 1 cup)