#!/bin/bash
# WireGuard Secure Installer
# Copyright (c) 2025 Muhammad Fadhila Abiyyu Faris
# GitHub: [github.com/fadhila36/wireguard-secure-installer](https://github.com/fadhila36/wireguard-secure-installer)

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[0;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

log_info() {
    echo -e "${GREEN}[INFO]${NC} $1"
    echo "[INFO] $1" >> "$LOG_FILE"
}

log_warn() {
    echo -e "${YELLOW}[WARN]${NC} $1"
    echo "[WARN] $1" >> "$LOG_FILE"
}

log_error() {
    echo -e "${RED}[ERROR]${NC} $1"
    echo "[ERROR] $1" >> "$LOG_FILE"
}

fatal_error() {
    log_error "$1"
    exit 1
}

check_root() {
    if [ "$EUID" -ne 0 ]; then
        fatal_error "This script must be run as root."
    fi
}

show_banner() {
    clear
    echo -e "${BLUE}"
    echo "========================================================================="
    echo "   WireGuard Secure Installer Enterprise"
    echo "   (c) 2025 Muhammad Fadhila Abiyyu Faris"
    echo "   https://github.com/fadhila36/wireguard-secure-installer"
    echo "========================================================================="
    echo -e "${NC}"
}

cleanup() {
    if [ $? -ne 0 ]; then
        log_error "An error occurred. Check $LOG_FILE for details."
    fi
}