# ClamAV antivirus management commands
# Each function returns a bash command string that app.py executes via ssh_run()


def status_cmd():
    """Return bash cmd to check ClamAV install and service status."""
    return (
        "echo '=== ClamAV Installation ===' && "
        "dpkg -l | grep clamav | awk '{print $2, $3}' 2>/dev/null || echo 'ClamAV not installed' && "
        "echo '' && echo '=== Service Status ===' && "
        "systemctl is-active clamav-daemon 2>/dev/null && echo 'clamd: running' || echo 'clamd: not running' && "
        "systemctl is-active clamav-freshclam 2>/dev/null && echo 'freshclam: running' || echo 'freshclam: not running' && "
        "echo '' && echo '=== Virus DB ===' && "
        "if [ -f /var/lib/clamav/daily.cld ] || [ -f /var/lib/clamav/daily.cvd ]; then "
        "  ls -lh /var/lib/clamav/*.{cld,cvd} 2>/dev/null; "
        "  sigtool --info /var/lib/clamav/daily.cld 2>/dev/null | grep -E 'Version|Sigs|Build' || "
        "  sigtool --info /var/lib/clamav/daily.cvd 2>/dev/null | grep -E 'Version|Sigs|Build'; "
        "else "
        "  echo 'No virus database found'; "
        "fi && "
        "echo '' && echo '=== ClamAV Version ===' && "
        "clamscan --version 2>/dev/null || echo 'clamscan not found'"
    )


def install_cmd():
    """Return bash cmd to install ClamAV and enable services."""
    return (
        "DEBIAN_FRONTEND=noninteractive apt-get update -qq && "
        "DEBIAN_FRONTEND=noninteractive apt-get install -y clamav clamav-daemon clamav-freshclam 2>&1 && "
        "systemctl stop clamav-freshclam 2>/dev/null; "
        "freshclam 2>&1; "
        "systemctl enable clamav-daemon clamav-freshclam 2>&1 && "
        "systemctl start clamav-freshclam 2>&1 && "
        "systemctl start clamav-daemon 2>&1 && "
        "echo 'ClamAV installed and services started'"
    )


def update_defs_cmd():
    """Return bash cmd to update virus definitions."""
    return (
        "systemctl stop clamav-freshclam 2>/dev/null; "
        "freshclam 2>&1; "
        "systemctl start clamav-freshclam 2>&1 && "
        "echo '' && echo '=== Updated DB Info ===' && "
        "ls -lh /var/lib/clamav/*.{cld,cvd} 2>/dev/null"
    )


def scan_cmd(path, recursive=True):
    """Return bash cmd to scan a path with clamscan."""
    flags = "-ri" if recursive else "-i"
    return (
        f"echo '=== Scanning: {path} ===' && "
        f"echo 'Started: '$(date) && "
        f"clamscan {flags} --no-summary '{path}' 2>&1; "
        f"clamscan {flags} '{path}' 2>&1 | tail -8 && "
        f"echo 'Finished: '$(date)"
    )


def scan_quick_cmd():
    """Return bash cmd for a quick scan of common attack targets."""
    return (
        "echo '=== Quick Scan: /tmp /var/tmp /dev/shm /var/www /home ===' && "
        "echo 'Started: '$(date) && "
        "clamscan -ri --no-summary /tmp /var/tmp /dev/shm /var/www /home 2>&1; "
        "clamscan -ri /tmp /var/tmp /dev/shm /var/www /home 2>&1 | tail -10 && "
        "echo 'Finished: '$(date)"
    )


def scan_full_cmd():
    """Return bash cmd for full system scan (excludes /proc /sys /dev)."""
    return (
        "echo '=== Full System Scan ===' && "
        "echo 'Started: '$(date) && "
        "clamscan -ri --exclude-dir='^/proc' --exclude-dir='^/sys' "
        "--exclude-dir='^/dev' --exclude-dir='^/run' "
        "--log=/var/log/clamav/lastscan.log / 2>&1 | tail -15 && "
        "echo 'Finished: '$(date)"
    )


def log_cmd(lines=50):
    """Return bash cmd to view ClamAV scan logs."""
    return (
        "echo '=== Last Scan Log ===' && "
        f"tail -{lines} /var/log/clamav/lastscan.log 2>/dev/null || echo 'No scan log found' && "
        "echo '' && echo '=== Freshclam Log ===' && "
        f"tail -20 /var/log/clamav/freshclam.log 2>/dev/null || echo 'No freshclam log found'"
    )


def quarantine_list_cmd():
    """Return bash cmd to list quarantined files."""
    return (
        "echo '=== Quarantine ===' && "
        "if [ -d /var/lib/clamav/quarantine ]; then "
        "  ls -lhR /var/lib/clamav/quarantine 2>/dev/null; "
        "  echo '' && echo \"Total: $(find /var/lib/clamav/quarantine -type f | wc -l) files\"; "
        "else "
        "  echo 'No quarantine directory (clean system)'; "
        "fi"
    )


def quarantine_scan_cmd(path, recursive=True):
    """Return bash cmd to scan and move infected files to quarantine."""
    flags = "-ri" if recursive else "-i"
    return (
        "mkdir -p /var/lib/clamav/quarantine && "
        f"echo '=== Scan + Quarantine: {path} ===' && "
        f"clamscan {flags} --move=/var/lib/clamav/quarantine "
        f"--log=/var/log/clamav/lastscan.log '{path}' 2>&1 | tail -15"
    )


def quarantine_delete_cmd():
    """Return bash cmd to purge all quarantined files."""
    return (
        "if [ -d /var/lib/clamav/quarantine ]; then "
        "  count=$(find /var/lib/clamav/quarantine -type f | wc -l) && "
        "  rm -rf /var/lib/clamav/quarantine/* && "
        "  echo \"Purged $count quarantined files\"; "
        "else "
        "  echo 'No quarantine directory'; "
        "fi"
    )


def schedule_cmd(schedule="daily", paths="/"):
    """Return bash cmd to set up a cron job for scheduled scanning."""
    if schedule == "daily":
        cron_time = "0 3 * * *"
    elif schedule == "weekly":
        cron_time = "0 3 * * 0"
    elif schedule == "monthly":
        cron_time = "0 3 1 * *"
    else:
        cron_time = "0 3 * * *"
    return (
        f"(crontab -l 2>/dev/null | grep -v 'setec-clamscan'; "
        f"echo '{cron_time} clamscan -ri --exclude-dir=\"^/proc\" --exclude-dir=\"^/sys\" "
        f"--exclude-dir=\"^/dev\" --exclude-dir=\"^/run\" "
        f"--move=/var/lib/clamav/quarantine --log=/var/log/clamav/lastscan.log "
        f"{paths} # setec-clamscan') | crontab - 2>&1 && "
        f"echo 'Scheduled {schedule} scan of {paths}' && "
        f"crontab -l | grep setec-clamscan"
    )


def schedule_status_cmd():
    """Return bash cmd to show current scan schedule."""
    return (
        "echo '=== Scan Schedule ===' && "
        "crontab -l 2>/dev/null | grep setec-clamscan || echo 'No scheduled scan'"
    )


def schedule_remove_cmd():
    """Return bash cmd to remove scheduled scan."""
    return (
        "(crontab -l 2>/dev/null | grep -v 'setec-clamscan') | crontab - 2>&1 && "
        "echo 'Scheduled scan removed'"
    )


def config_cmd():
    """Return bash cmd to show ClamAV config."""
    return (
        "echo '=== clamd.conf ===' && "
        "cat /etc/clamav/clamd.conf 2>/dev/null || echo 'Not found' && "
        "echo '' && echo '=== freshclam.conf ===' && "
        "cat /etc/clamav/freshclam.conf 2>/dev/null || echo 'Not found'"
    )


def uninstall_cmd():
    """Return bash cmd to remove ClamAV."""
    return (
        "systemctl stop clamav-daemon clamav-freshclam 2>/dev/null; "
        "DEBIAN_FRONTEND=noninteractive apt-get remove --purge -y clamav clamav-daemon clamav-freshclam 2>&1 && "
        "apt-get autoremove -y 2>&1 && "
        "echo 'ClamAV uninstalled'"
    )