War Within: Battle Of Depression

For years the church and Christians at large have been okay with talking about things like alcohol addiction, broken marriages, character flaws, etc. But, what answer does the church have when people battle anxiety, depression and mental health? Is it simply to pray it away? Do I not have enough faith if it doesn’t go away? There are so many questions and more often than not there are very little answers. What does the Bible have to say about this? Is there any hope for people wrestling with this? How can you help people who are battling these things?