Solidworks custom script for variable chamfer

Tools and dyes in the form of plates have through openings which need chamfer. Solidworks has a chamfer option which is generic and applies to the entire feature. I am looking for a script that will isolate each line of the feature and give it the maximum possible chamfer. The chamfer for each line of the feature is calculated such that the chamfer does not cause the material to open. The attachement show a few features that have been done as a sample case. A script is required that will automatically make the chamfer for all lines of all features. The criteria is that the material thickness ("WALL") that is left from the other side and the chamfer is user defined to be 1mm or 0.5mm. Angle of chamfer that can be used - 30 , 45, 60 , 120, 150 deg. Depth of chamfer is based on calculation to maintain the WALL.