#!/usr/bin/env bash
[ -f functions.sh ] && source functions.sh

user=$1
shift
shift

newNick="$1"

# Validate that user is authorized
if [[ ! "$user" =~ $allowList ]]; then
    exit 0
fi

# Validate IRC nickname format (RFC 2812)
# Nicknames can contain: a-z A-Z 0-9 _ - [ ] { } \ | ^
if [[ -z "$newNick" ]]; then
    msg "#$channel" "$user: Please provide a nickname."
    exit 0
fi

if ! [[ "$newNick" =~ ^[a-zA-Z0-9_\[\]\{\}\\|\^-]+$ ]]; then
    msg "#$channel" "$user: Invalid nickname format. Only alphanumeric and _-[]{}\\|^ allowed."
    exit 0
fi

if [[ ${#newNick} -gt 30 ]]; then
    msg "#$channel" "$user: Nickname too long (max 30 characters)."
    exit 0
fi

# Change the nick
./modules/do/do.sh "$newNick" "#$channel" "does a magical gesture and turns into ${newNick}!"
nick "$newNick"

# Safely update config file - escape forward slashes for sed
escapedNick="${newNick//\//\\/}"
sed -i "s/^nick=.*/nick=\"${escapedNick}\"/" bot.cfg