#!/bin/bash
# Regenerates assets/puzzles.json and assets/thumbnails.json from the
# images in assets/images/puzzles/.
#
# Conventions:
#   Full image:  assets/images/puzzles/<name>.png
#   Thumbnail:   assets/images/puzzles/thumb_<name>.png
#   Puzzle key:  puzzle_<name>  (hyphens replaced with underscores)
#   Thumb key:   thumb_<name>   (hyphens replaced with underscores)
#   Label:       title-cased from <name>, underscores/hyphens → spaces
#
# Usage:  cd <repo-root> && bash assets/images/puzzles/sync_json.sh

set -euo pipefail
cd "$(git rev-parse --show-toplevel)"

PUZZLE_DIR="assets/images/puzzles"
PUZZLES_JSON="assets/puzzles.json"
THUMBS_JSON="assets/thumbnails.json"

puzzles="["
thumbs="["
first=true

for img in "$PUZZLE_DIR"/*.png; do
  base=$(basename "$img" .png)

  # Skip thumbnails, scripts
  [[ "$base" == thumb_* ]] && continue
  [[ "$base" == *.sh ]] && continue

  # Derive keys (replace hyphens with underscores for keys)
  safe="${base//-/_}"
  puzzle_key="puzzle_${safe}"
  thumb_key="thumb_${safe}"
  thumb_file="$PUZZLE_DIR/thumb_${base}.png"

  # Skip if no matching thumbnail
  if [ ! -f "$thumb_file" ]; then
    echo "WARNING: No thumbnail for $base — skipping"
    continue
  fi

  # Build label: replace underscores/hyphens with spaces, then title-case
  label=$(echo "$base" | sed 's/[_-]/ /g' | sed 's/\b\(.\)/\u\1/g')

  sep=""
  $first || sep=","
  first=false

  puzzles+="${sep}
  {
    \"key\": \"${puzzle_key}\",
    \"path\": \"${PUZZLE_DIR}/${base}.png\",
    \"label\": \"${label}\"
  }"

  thumbs+="${sep}
  {
    \"key\": \"${thumb_key}\",
    \"path\": \"${PUZZLE_DIR}/thumb_${base}.png\",
    \"puzzleKey\": \"${puzzle_key}\"
  }"
done

puzzles+="
]"
thumbs+="
]"

echo "$puzzles" > "$PUZZLES_JSON"
echo "$thumbs" > "$THUMBS_JSON"

echo "Updated $PUZZLES_JSON ($(grep -c '"key"' "$PUZZLES_JSON") entries)"
echo "Updated $THUMBS_JSON ($(grep -c '"key"' "$THUMBS_JSON") entries)"