A 45-year-old patient presents to the primary care clinic with a sudden onset of unilateral facial weakness. The patient describes experiencing drooling, loss of taste on the affected side, and ear pain. There are no reports of fever, neck stiffness, or other systemic symptoms. Physical examination reveals flaccid paralysis of the facial muscles on one side, an inability to close the eye on the same side, and diminished tear production. Based on these findings, what is the most likely diagnosis?