#!/usr/bin/env bash
# Build a bootable Debian Live USB image with FieldWitness pre-installed.
#
# Prerequisites:
#   apt install live-build
#
# Usage:
#   cd deploy/live-usb
#   sudo ./build.sh
#
# Output: live-image-amd64.hybrid.iso (flash to USB with dd or Balena Etcher)
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
FIELDWITNESS_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"

echo "=== FieldWitness Live USB Image Builder ==="
echo "Source: $FIELDWITNESS_ROOT"
echo

cd "$SCRIPT_DIR"

# Clean previous builds
lb clean 2>/dev/null || true

# Configure live-build
lb config \
    --distribution bookworm \
    --architectures amd64 \
    --binary-images iso-hybrid \
    --memtest none \
    --bootappend-live "boot=live components locales=en_US.UTF-8 keyboard-layouts=us" \
    --apt-indices false \
    --security true \
    --updates true

# Build
echo "Building image (this takes 10-20 minutes)..."
lb build

echo
echo "=== Build complete ==="
echo "Image: $(ls -lh live-image-*.iso 2>/dev/null || echo 'Check for .iso file')"
echo
echo "Flash to USB:"
echo "  sudo dd if=live-image-amd64.hybrid.iso of=/dev/sdX bs=4M status=progress"
echo "  (replace /dev/sdX with your USB device)"