macOS Changing filenames with Apple Script

I like to keep my replay section for Warcraft III clean, so I was editing loads of filenames when I suddenly realized it could be done so much faster with an Apple Script. Sadly however, I hardly know anything about apple script. I found a sample script made by Apple, but I'm unable to tamper with it to adapt it to my needs.

Basically, I need the applescript to move segments of a filename.

I have a great amount of replays named either [xxxxxxxxx]-player1(y)-vs-player2(y).w3g or [xxxxxxxxx]player1(y)-vs-player2(y), where x is the match-ID and y is the players race.

[wcr20060205]WE_IGE_Sweet_(U)_4K_Grubby_(O)_4.w3g:
The filename as a whole could be divided into three segments:
• The match-ID: "[wcr20060205]"
• Players & races: "WE_IGE_Sweet_(U)_4K_Grubby_(O)_4"
• extension ".w3g

What I want the script to do, is to move the ID in the brackets, and the brackets itself behind the players.

Example:
[wcr20060205]4K_Grubby_(O)_WE_IGE_Sweet_(U)_5.w3g transfers into
4k_Grubby_(O)_WE_IGE_Sweet_(U)_5[wcr20060205].w3g

[Replayers56402]-strifecro(NE)-vs-rara.(HMN).w3g transfers into
-strifecro(NE)-vs-rara.(HMN)[Replayers56402].w3g


Thanks in advance, cheers.

Attachment: Sample script in .txt format from Apple to change filenames, might come in handy.

EDIT:
Problem solved, shell scripting ftw ---> 4K_Grubby_(O)_WE_IGE_Sweet_(U)_5[wcr20060205].w3g