Help in deciphering the meaning of this convoluted sentence

I was reading an answer on one of the sister sites of this site and came across this line :

A common question, glad you asked it. Here is all you never thought you would ever not want to know about it.

I read the second sentence three or four times but still confused at what it means. Can someone break down this convoluted sentence and help me understand the idea behind this sentence?

"More than you'd ever want" is a common expression meaning, well, "this is more than you need or want."

In this context, the author is warning the person that there will be more than eoungh information.

"More than you would ever not want to know" is a humorous extension of this to say "I am going to give you so much more information than you asked for that you wish you never received the information in the first place." The context is that the recipient has the tidbit of answer accompanied by a large body of possibly undesirable information.

"all you never thought..." extends this further (humorously) by implying that the amount of extra unwatned information is large beyond the imagination of the recipient.

Sayings like "I never thought I'd be able to do that, but I did" etc. are pretty common. The speaker is playing with this convention.