#!/bin/bash

# Variables
CREDENTIAL_FILE="nord.creds"
OVPN_DIR="ovpn_tcp" 
LOG_FILE="/root/openvpn.log"
RESULT_FILE="vpnlist.txt"
OVPN_ZIP_URL="https://downloads.nordcdn.com/configs/archives/servers/ovpn.zip"

# Get current IP before starting
CURRENT_IP=$(curl -s ifconfig.me)
echo "$(date) [Main Script]: Current IP before VPN connections: $CURRENT_IP"

# Terminate any existing OpenVPN connections
PIDS=$(pgrep openvpn)
if [ -n "$PIDS" ]; then
    kill $PIDS
    echo "$(date) [Main Script]: Existing OpenVPN connections terminated."
fi

# Download and extract OVPN configurations
if [ ! -d "$OVPN_DIR" ]; then
    mkdir "$OVPN_DIR"
fi

curl -s -L -o "$OVPN_DIR/ovpn.zip" "$OVPN_ZIP_URL" 
unzip -q -o "$OVPN_DIR/ovpn.zip" -d "$OVPN_DIR"
rm "$OVPN_DIR/ovpn.zip"

# Find all OVPN files except those starting with "us", "del", or "uk"
OVPN_FILES=$(find "$OVPN_DIR" -name "*.ovpn" ! -name "us*.ovpn" ! -name "del*.ovpn" ! -name "uk*.ovpn")

# Get the total number of OVPN files
TOTAL_FILES=$(echo "$OVPN_FILES" | wc -l)

# Process each OVPN file
FILE_NUM=1
for OVPN_FILE in $OVPN_FILES; do
    OVPN_FILENAME=$(basename "$OVPN_FILE")

    # Read credentials
    USERNAME=$(head -n 1 "$CREDENTIAL_FILE")
    PASSWORD=$(tail -n 1 "$CREDENTIAL_FILE")

    # Establish VPN connection
    echo "$PASSWORD" | openvpn --config "$OVPN_FILE" --auth-user-pass "$CREDENTIAL_FILE" --daemon --log-append "$LOG_FILE"

    # Wait for connection to establish 
    echo "$(date) [$FILE_NUM/$TOTAL_FILES] [$OVPN_FILENAME]: Waiting for VPN connection to establish..."
    sleep 10
    echo "$(date) [$FILE_NUM/$TOTAL_FILES] [$OVPN_FILENAME]: VPN connection established."

    # Check external IP (with validation and retries)
    EXTERNAL_IP=$(curl -s ifconfig.me)

    if ! [[ $EXTERNAL_IP =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
        echo "$(date) [$FILE_NUM/$TOTAL_FILES] [$OVPN_FILENAME]: Invalid response from ifconfig.me, retrying with ifconfig.co"
        EXTERNAL_IP=$(curl -s ifconfig.co)

        if ! [[ $EXTERNAL_IP =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
            echo "$(date) [$FILE_NUM/$TOTAL_FILES] [$OVPN_FILENAME]: Invalid response from ifconfig.co, retrying with ipinfo.io/ip"
            EXTERNAL_IP=$(curl -s ipinfo.io/ip)

            if ! [[ $EXTERNAL_IP =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
                echo "$(date) [$FILE_NUM/$TOTAL_FILES] [$OVPN_FILENAME]: Unable to get external IP. Skipping this OVPN file."
                continue  # Skip to the next OVPN file
            fi
        fi
    fi

    echo "$(date) [$FILE_NUM/$TOTAL_FILES] [$OVPN_FILENAME]: External IP via VPN: $EXTERNAL_IP"

    # Append result to file
    echo "$EXTERNAL_IP # $OVPN_FILENAME" >> "$RESULT_FILE"

    # Disconnect VPN
    PIDS=$(pgrep openvpn) 
    if [ -n "$PIDS" ]; then
        kill $PIDS 
        echo "$(date) [$FILE_NUM/$TOTAL_FILES] [$OVPN_FILENAME]: VPN disconnected."
    else
        echo "$(date) [$FILE_NUM/$TOTAL_FILES] [$OVPN_FILENAME]: No openvpn process found."
    fi

    # Wait for a random time between 8 and 30 seconds
    SLEEP_TIME=$(((RANDOM % 23) + 8)) 
    echo "$(date) [$FILE_NUM/$TOTAL_FILES] [$OVPN_FILENAME]: Waiting for $SLEEP_TIME seconds before the next connection..."
    sleep $SLEEP_TIME
    echo "$(date) [$FILE_NUM/$TOTAL_FILES] [$OVPN_FILENAME]: Resuming..."

    # Increment file number
    FILE_NUM=$((FILE_NUM + 1))
done