#!/bin/sh

# Add signal handling
cleanup() {
    echo "Received shutdown signal, stopping FTP client..."
    exit 0
}

# Trap SIGTERM and SIGINT
trap cleanup SIGTERM SIGINT

echo "Starting FTP client script..."

# FTP server details (from environment variables with defaults)
FTP_HOST="${FTP_HOST:-ftp-server}"
FTP_PORT="${FTP_PORT:-21}"
FTP_USER="${FTP_USER:-anonymous}"
FTP_PASS="${FTP_PASS:-anonymous}"

echo "Configuration:"
echo "  FTP_HOST: $FTP_HOST"
echo "  FTP_PORT: $FTP_PORT"
echo "  FTP_USER: $FTP_USER"
echo "  FTP_PASS: $FTP_PASS"
echo ""


while true; do
    echo "Executing FTP commands..."

    lftp -d -u $FTP_USER,$FTP_PASS $FTP_HOST <<EOF
set ftp:ssl-allow no
set cmd:fail-exit yes
set net:timeout 10
set net:max-retries 3
ls -la
echo 'Changing to pub directory:'
cd pub
echo 'Listing pub directory:'
ls -la
echo 'Downloading welcome.txt:'
get welcome.txt
echo 'Download completed!'
quit
EOF

    echo "FTP operations completed!"

    # Force stdout flush
    sync

    # Show downloaded file if it exists
    if [ -f "welcome.txt" ]; then
        echo "Downloaded file contents:"
        echo "===================="
        cat welcome.txt
        echo ""
        echo "===================="

        rm -f welcome.txt
        echo "welcome.txt has been removed after download."
    else
        echo "Warning: welcome.txt was not downloaded"
    fi

    sync

    echo "Waiting 5 seconds before next FTP operation..."
    sleep 5 &
    wait $!
done