What is the range of life sentences for a convicted violent criminal who was convicted of assault with intent to murder, assault, and possession of a firearm under the Mental Health Act?

(People v. Valenti (2016) 243 Cal.App.4th 1140, 1178-1179.) Based on appellant's lengthy criminal history and threat to shoot three undercover officers, the trial court reasonably believed that an aggregate 50-year-to-life sentence should be imposed. The 2008 probation report listed six aggravating factors, no mitigating factors, and recommended consecutive sentences. It stated that appellant "is a violent and dangerous criminal with an extensive prior criminal history" and "is an acute threat to the community. . . . A maximum prison sentence is the only appropriate sentence for the defendant in this matter."