How do I make my Ai to do this functionality ?

To check if each puck has a straight shot to the goal, you can try this:

For each puck, check the angle from the striker to the puck using angle(striker.x, striker.y, puck.x, puck,y), and have a long invisible line object that is spawned from the puck, and aimed in whatever direction the angle from the striker to the puck was. Then just check if that line intersects with a goal but not any other pucks.

It may be better to use Line Of Sight behavior to check if the path is clear. Either check LOS or cast a ray and see if it intersects any objects.

Oh yeah true I completely forgot about that behavior.