It couldn't have happened to a nicer person

[YOSHITAKEHORI]

Could anyone tell me the meaning the following sentence?
'' It couldn't have happened to a nicer person.''

Similar sentences appears on the English text, but I cannot understand
'' It couldn't have happened to -----''

[ebb]

It's a joke. When something bad happens to a person you don't like, you say "Well, it couldn't have happened to a nicer guy."
....

It's ironic, in short. He's not a nice guy, and it wasn't a good thing that happened to him. In fact, it's probably sarcastic, not merely ironic.

[YOSHITAKEHORI]

ebb. Thank you for your kind reply!

But I am still a littile bit confused. The whole conversation which I heard is asfollow:

Woman:''Did you hear that Mr.Cheung is going to be our new vice president?''
Man A:'' Really? Well, it couldn't have happened to a nicer person.''
Woman: '' You know , I remember when he was a clerk in the mail room''

In this case, May I understand that the man A doesn't think well of Mr Cheung's promotion? or..... If the sentence is '' It could have happned to
a nicer person.'' , I can fully understand.

[ebb]

To be ironic, something bad must have happened to Mr. C. As in, "Hey I hear that Cheung got fired!"
"Well.... it couldn't have happened to a nicer guy."

Here, Ch. got promoted, not fired, so the "nicer guy" comment is not ironic but sincere.

Non-ironic Meaning "He is a very nice person and I'm glad for him."

Ironic meaning (when it's a bad event): "He's a bastard and deserves what he gets."

[YOSHITAKEHORI]

ebb-san
Thank you very much for your perfect explanation!