#!/usr/bin/env bash
# ===========================================================================
#  Stage 11: System Tweaks
#  sysctl tuning, kernel cmdline parameters, TLP/powertop, modprobe.
#  Uses distro-agnostic variables from lib/distro.sh.
# ===========================================================================
#  CAUTION: GPU kernel parameters are hardware-specific (AMD Radeon 680M).
#  They are COMMENTED OUT by default. Uncomment only if you have the same GPU.
# ===========================================================================

CONFIG_DIR="${SCRIPT_DIR:-$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)}/config"

# ===========================================================================
#  1. TLP / PowerTOP
# ===========================================================================
info "Configuring power management..."

# Enable TLP on Debian, tuned (already enabled) on Fedora
if [ "$DISTRO_FAMILY" = "debian" ]; then
  $SERVICE_ENABLE tlp 2>/dev/null && ok "TLP enabled." || warn "TLP not available."
else
  # tuned is already enabled from stage 02
  if systemctl is-active tuned &>/dev/null; then
    ok "tuned is running (enabled in stage 02)"
  fi
fi

if command -v powertop &>/dev/null; then
  # Enable powertop auto-tune via systemd service
  if [ ! -f /etc/systemd/system/powertop.service ]; then
    sudo tee /etc/systemd/system/powertop.service > /dev/null << 'EOF'
[Unit]
Description=PowerTOP auto tune
[Service]
Type=oneshot
ExecStart=/usr/sbin/powertop --auto-tune
[Install]
WantedBy=multi-user.target
EOF
    sudo systemctl daemon-reload
  fi
  $SERVICE_ENABLE powertop 2>/dev/null && ok "PowerTOP auto-tune enabled." || true
fi
ok "Stage 11 complete: system tweaks applied."