#!/usr/bin/env bash
# extract-archive.sh — mine code from an archived prior platform version.
#
# Tarballs live in <repo>/.archive/platform.{0,1,2}.tar.zst (LFS-tracked).
# Extracts to /tmp/atlilith-archive/<name>/ so the working tree stays clean.
#
# Usage: ./scripts/extract-archive.sh <platform.0|platform.1|platform.2>

set -euo pipefail

usage() {
  echo "Usage: $0 <platform.0|platform.1|platform.2>" >&2
  echo "" >&2
  echo "  platform.0 — egirl-platform (viky-era)" >&2
  echo "  platform.1 — lilith-platform (V1, 54-feature SaaS)" >&2
  echo "  platform.2 — lilith-platform.live (V2, Quinn-personal, currently in prod)" >&2
  exit 2
}

if [[ $# -ne 1 ]]; then
  usage
fi

name="$1"
case "$name" in
  platform.0|platform.1|platform.2) ;;
  *) usage ;;
esac

# Resolve repo root (parent of @platform/, which contains this script).
script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
repo_root="$(cd "$script_dir/../.." && pwd)"

archive="$repo_root/.archive/${name}.tar.zst"
dest="/tmp/atlilith-archive/${name}"

if [[ ! -f "$archive" ]]; then
  echo "error: $archive not found." >&2
  echo "Tarballs not yet built. On apricot, run:" >&2
  echo "  ./scripts/build-archives.sh    # for platform.1 + platform.2" >&2
  echo "  ./scripts/cache-v0.sh          # for platform.0 (from NFS)" >&2
  exit 1
fi

if ! command -v unzstd >/dev/null 2>&1; then
  echo "error: unzstd not found. Install zstd (brew install zstd / apt install zstd)." >&2
  exit 1
fi

mkdir -p "$dest"

echo "Extracting $archive -> $dest ..."
tar --use-compress-program=unzstd -xf "$archive" -C "$dest"

echo "Done. Mined source at: $dest"
echo "Cleanup when finished: rm -rf $dest"