#!/usr/bin/env bash

BASHRC="$HOME/.bashrc"
BACKUP="$HOME/.bashrc.backup.$(date +%F-%H%M%S)"

cp "$BASHRC" "$BACKUP"

NEW_PS1='\[$(tput bold)\]\[\033[38;5;11m\]\u\[$(tput sgr0)\]@\[$(tput sgr0)\]\[$(tput bold)\]\[\033[38;5;9m\]\H\[$(tput sgr0)\] \[$(tput sgr0)\]\[\033[38;5;6m\][\w]\[$(tput sgr0)\]:\\$ \[$(tput sgr0)\]'

TMP=$(mktemp)

while IFS= read -r line; do
    if [[ $line =~ ^[[:space:]]*PS1= ]]; then
        indent=$(echo "$line" | grep -o '^[[:space:]]*')
        echo "${indent}PS1='$NEW_PS1'" >> "$TMP"
    else
        echo "$line" >> "$TMP"
    fi
done < "$BASHRC"

mv "$TMP" "$BASHRC"

echo ".bashrc updated. Backup saved to $BACKUP. Run: source ~/.bashrc to apply changes now."