#!/usr/bin/env bash
# Download DOP20 assets (JP2/J2W/XML) listed line-by-line in archive/dop20/filelist.txt.
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")"/.. && pwd)"
DOP_ROOT="$ROOT/raw/dop20"
LIST="${LIST:-$ROOT/archive/dop20/filelist.txt}"
OUT_JP2="$DOP_ROOT/jp2"
OUT_J2W="$DOP_ROOT/j2w"
OUT_META="$DOP_ROOT/meta"

if [[ ! -f "$LIST" ]]; then
  echo "Missing filelist: $LIST" >&2
  exit 1
fi

mkdir -p "$OUT_JP2" "$OUT_J2W" "$OUT_META"

while IFS= read -r url; do
  [[ -z "$url" || "$url" =~ ^# ]] && continue
  fname="${url##*/}"
  case "$fname" in
    *.jp2) dest="$OUT_JP2/$fname" ;;
    *.j2w) dest="$OUT_J2W/$fname" ;;
    *_meta.xml) dest="$OUT_META/$fname" ;;
    *) echo "Skipping unknown asset type: $fname" >&2; continue ;;
  esac
  if [[ -f "$dest" ]]; then
    echo "Exists: $fname"
    continue
  fi
  echo "Downloading $fname"
  curl -fL "$url" -o "$dest"
done < "$LIST"

echo "Done. Files in $OUT_JP2, $OUT_J2W, $OUT_META"