#!/usr/bin/env bash
# Install from caches filled by download-deps.sh. Unpacks the official Node
# archive into .offline-cache/node/runtime and prepends it to PATH so the
# offline machine does not need a system Node. Fails if any lockfile package
# is missing from .offline-store (no registry access).
#
# Usage (repo root):  bash scripts/offline/install-deps.sh [--build]
set -euo pipefail

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

BUILD=0
for arg in "$@"; do
  case "$arg" in
    --build) BUILD=1 ;;
    *)
      echo "Unknown argument: $arg (expected --build)" >&2
      exit 1
      ;;
  esac
done

NODE_CACHE="$ROOT/.offline-cache/node"
META_PATH="$NODE_CACHE/runtime.json"
if [[ ! -f "$META_PATH" ]]; then
  echo "Missing $META_PATH. Run scripts/offline/download-deps.sh on a networked machine first, then copy the checkout." >&2
  exit 1
fi

NODE_VERSION="$(sed -n 's/.*"version":"\([^"]*\)".*/\1/p' "$META_PATH" | head -n 1)"
ARCHIVE_NAME="$(sed -n 's/.*"archive":"\([^"]*\)".*/\1/p' "$META_PATH" | head -n 1)"
PLATFORM="$(sed -n 's/.*"platform":"\([^"]*\)".*/\1/p' "$META_PATH" | head -n 1)"
ARCHIVE_PATH="$NODE_CACHE/$ARCHIVE_NAME"
RUNTIME_DIR="$NODE_CACHE/runtime"
NODE_PREFIX="$RUNTIME_DIR/node-v${NODE_VERSION}-${PLATFORM}"

if [[ ! -x "$NODE_PREFIX/bin/node" ]]; then
  if [[ ! -f "$ARCHIVE_PATH" ]]; then
    echo "Missing Node archive $ARCHIVE_PATH. Re-run download-deps.sh." >&2
    exit 1
  fi
  rm -rf "$RUNTIME_DIR"
  mkdir -p "$RUNTIME_DIR"
  case "$ARCHIVE_PATH" in
    *.tar.xz) tar -xJf "$ARCHIVE_PATH" -C "$RUNTIME_DIR" ;;
    *.tar.gz) tar -xzf "$ARCHIVE_PATH" -C "$RUNTIME_DIR" ;;
    *.zip) unzip -q "$ARCHIVE_PATH" -d "$RUNTIME_DIR" ;;
    *)
      echo "Unknown Node archive: $ARCHIVE_PATH" >&2
      exit 1
      ;;
  esac
fi
if [[ ! -x "$NODE_PREFIX/bin/node" ]]; then
  echo "Unpacked Node is missing: $NODE_PREFIX/bin/node" >&2
  exit 1
fi
export PATH="$NODE_PREFIX/bin:$PATH"

STORE_DIR="$ROOT/.offline-store"
COREPACK_HOME="$ROOT/.offline-cache/corepack"
if [[ ! -d "$STORE_DIR" ]]; then
  echo "Missing $STORE_DIR. Run scripts/offline/download-deps.sh on a networked machine first, then copy the checkout." >&2
  exit 1
fi
if [[ ! -d "$COREPACK_HOME" ]]; then
  echo "Missing $COREPACK_HOME. Re-run download-deps.sh so Corepack pnpm is cached in-repo." >&2
  exit 1
fi

export COREPACK_HOME
export COREPACK_ENABLE_NETWORK=0

PACKAGE_MANAGER="$(sed -n 's/.*"packageManager": "\(pnpm@[0-9.]*\)".*/\1/p' package.json | head -n 1)"

echo "Offline install $PACKAGE_MANAGER from $STORE_DIR (Node $(node --version))"
corepack pnpm install --offline --frozen-lockfile --store-dir "$STORE_DIR"

if [[ "$BUILD" -eq 1 ]]; then
  echo 'Building host/client libs, then the web frontend'
  npm run build:lib
  corepack pnpm --dir apps/web run build
  echo "Build complete. Start the UI with: $NODE_PREFIX/bin/corepack pnpm dsh web"
else
  echo 'Install complete. For dsh web also run: bash scripts/offline/install-deps.sh --build'
fi