#\!/bin/bash

# This module contains utility functions

# Text colors
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
RED='\033[0;31m'
NC='\033[0m' # No Color

# Function to check if a command exists
command_exists() {
    command -v "$1" &> /dev/null
}

# Function to check if running as root
check_root() {
    if [ "$(id -u)" -ne 0 ]; then
        echo -e "${RED}This script must be run as root or with sudo${NC}"
        exit 1
    fi
}

# Function to get the system's IP address
get_ip_address() {
    local ip=""
    
    if command_exists ip; then
        ip=$(ip -4 addr show scope global | grep -oP '(?<=inet\s)\d+(\.\d+){3}' | head -n 1)
    elif command_exists hostname; then
        ip=$(hostname -I | awk '{print $1}')
    elif command_exists ifconfig; then
        ip=$(ifconfig | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*' | grep -v '127.0.0.1' | head -n 1)
    fi
    
    echo "$ip"
}

# Function to check if a service is installed
service_exists() {
    local service_name=$1
    if [ -f "/etc/systemd/system/$service_name.service" ]; then
        return 0  # Service exists
    else
        return 1  # Service does not exist
    fi
}

# Function to create directory if it doesn't exist
ensure_dir_exists() {
    local dir_path=$1
    
    if [ \! -d "$dir_path" ]; then
        mkdir -p "$dir_path"
        echo "Created directory: $dir_path"
    fi
}

# Function to verify file permissions
verify_permissions() {
    local file_path=$1
    local user=$2
    
    # If user is not specified, use current user
    if [ -z "$user" ]; then
        user=$(whoami)
    fi
    
    # Check if file exists
    if [ \! -f "$file_path" ]; then
        echo "File does not exist: $file_path"
        return 1
    fi
    
    # Check ownership
    local owner=$(stat -c '%U' "$file_path")
    if [ "$owner" \!= "$user" ]; then
        echo "Changing ownership of $file_path to $user"
        sudo chown "$user" "$file_path"
    fi
    
    # Ensure file is executable if it's a script
    if [[ "$file_path" == *.sh ]]; then
        if [ \! -x "$file_path" ]; then
            echo "Making $file_path executable"
            chmod +x "$file_path"
        fi
    fi
    
    return 0
}