#!/bin/bash
# Verify Internal NVMe Boot Configuration
# This script checks if the internal drive (nvme0n1) is properly configured to boot

set -e

echo "=== Internal Drive Boot Verification ==="
echo ""

echo "1. Checking EFI partition mount..."
df -h /boot/efi | grep -E "Filesystem|nvme0n1p1" && echo "✓ EFI mounted from internal drive" || echo "✗ EFI not on internal drive"
echo ""

echo "2. Checking boot partition mount..."
df -h /boot | grep -E "Filesystem|internal--vg-boot" && echo "✓ Boot mounted from internal-vg" || echo "✗ Boot not on internal-vg"
echo ""

echo "3. Checking GRUB installation..."
if [ -f /boot/efi/EFI/ubuntu/shimx64.efi ]; then
    echo "✓ GRUB bootloader found in EFI"
else
    echo "✗ GRUB bootloader missing"
fi
echo ""

echo "4. Checking EFI boot entries..."
efibootmgr | grep -i ubuntu && echo "✓ Ubuntu boot entry exists" || echo "✗ No Ubuntu boot entry"
echo ""

echo "5. Checking GRUB environment..."
sudo grub-editenv list
if [ -z "$(sudo grub-editenv list)" ]; then
    echo "✓ GRUB environment clean (no boot failure flags)"
else
    echo "⚠ GRUB environment has settings"
fi
echo ""

echo "6. Checking current boot device..."
echo "Currently booted from: $(findmnt -n -o SOURCE /)"
echo ""

echo "7. Internal drive UUIDs..."
echo "Root: $(sudo blkid /dev/internal-vg/root -s UUID -o value)"
echo "Boot: $(sudo blkid /dev/internal-vg/boot -s UUID -o value)"
echo ""

echo "8. Checking /etc/fstab for internal drive..."
grep -E "internal-vg|757B-A377" /etc/fstab && echo "✓ Internal volumes in fstab" || echo "⚠ Check fstab configuration"
echo ""

echo "=== Verification Complete ==="
echo ""
echo "To test boot from internal drive:"
echo "1. Remove/disconnect the external USB M.2 drive"
echo "2. Reboot the system"
echo "3. System should boot from internal nvme0n1"