#!/usr/bin/env bash
# ─────────────────────────────────────────────────────────────────────────────
# Arcline OS — host build-dependency check
#
#   scripts/check-host-deps.sh          → report what's missing
#   scripts/check-host-deps.sh --install → apt-get install what's missing
#
# Builds run debootstrap (rootfs), copy overlays (standard tools), and produce
# a hybrid ISO via grub-mkrescue + mksquashfs.
# ─────────────────────────────────────────────────────────────────────────────
set -euo pipefail
source "$(dirname "${BASH_SOURCE[0]}")/common.sh"

NEEDED=(
  "debootstrap|debootstrap"
  "grub-mkrescue|grub2-common"
  "mksquashfs|squashfs-tools"
  "xorriso|xorriso"
  "cpio|cpio"
  "bash|bash"
  # disk images / installer
  "sgdisk|gdisk"
  "partprobe|parted"
  "rsync|rsync"
  "mkfs.vfat|dosfstools"
  "qemu-img|qemu-utils"
  "losetup|util-linux"
  # vendor packaging + secure boot
  "unzip|unzip"
  "dpkg-deb|dpkg"
  "openssl|openssl"
  "sbsign|sbsigntool"
  "sbverify|sbsigntool"
)

MISSING=()
for entry in "${NEEDED[@]}"; do
  bin="${entry%%|*}"; pkg="${entry##*|}"
  if ! command -v "$bin" >/dev/null 2>&1; then
    MISSING+=("$pkg")
    warn "missing: $bin (package: $pkg)"
  fi
done

if [[ ${#MISSING[@]} -eq 0 ]]; then
  log "all host build dependencies present ✓"
  exit 0
fi

if [[ "${1:-}" == "--install" ]]; then
  log "installing: ${MISSING[*]}"
  if [[ $EUID -ne 0 ]] && command -v sudo >/dev/null; then
    sudo apt-get update
    sudo apt-get install -y "${MISSING[@]}"
  else
    apt-get update
    apt-get install -y "${MISSING[@]}"
  fi
  log "dependencies installed ✓"
else
  echo
  echo "Run the following to install them:"
  echo "  sudo apt-get install -y ${MISSING[*]}"
  echo "or: scripts/check-host-deps.sh --install"
  exit 1
fi