Assisted dying: the debate

The perfect philosophical position supposes a situation where there is a guarantee that the law will never be abused and that the means of suicide will implicate no one other than the person who desires to end her/his life. This has been used in the past as a means of suggesting discrimination against those who are physically incapable at the end and can again lead people to make a more rushed decision than is necessary to ensure that they do not become trapped within this situation. What are the fundamental underlying core (neither medical nor legal) arguments for and against assisted dying/suicide and can we truly debate them in a purely philosophical manner unencumbered by social constructs?