A personalized music radio algorithm

This personalized music radio algorithm is developed based on five basic concepts

1. Personalization. The radio should play all songs either users have heard before or recommendation songs based on user music profile
2. Matching user's mood. The system may decide it based on user's interaction with the system
3. Minmum interaction. If user does not like the currently playing songs, they can just skip current song instead of constantly clicking on like or dislike button.
4. Continuity of the songs. It should make sure the diveristy of the songs it will play, but it can also ensure continnuity between two songs.
5. Randomness without repitition. There are no repitition of same songs in 50 songs, no repitition of the same artist in 10 songs