Merge DWGs to 1DWG and put all objects to one new layer named as the original filename

I have 1000 dwg that has text and lines on 2 layer, i want to merge them all in one dwg and the final dwg should have as layer names all the filename and all the objects (text,lines) should be in only one layer which is the filename the come from.

e.g t1.dwg, t2.dwg... -> merge.dwg (with two layer t1,t2...) every object from t1.dwg should be inside t1 layer in the merged dwg, same with the object from t2.dwg should be all inside t2 layer on the merged dwg, and so one for all the dwgs used as input.