#!/usr/bin/env bash
# Sync skills from global-skills + JEV into each agent's skills directory.
# Idempotent. Never touches entries that are not managed symlinks (e.g. omarchy).
set -euo pipefail

REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
GLOBAL_DIR="$REPO_DIR/skills"
JEV_DIR="$HOME/Projects/work/JEV/.agents/skills"
TARGETS=(
  "$HOME/.agents/skills"
  "$HOME/.codex/skills"
  "$HOME/.claude/skills"
)

declare -A source_of

while IFS= read -r -d '' d; do
  source_of["$(basename "$d")"]="global"
done < <(find "$GLOBAL_DIR" -mindepth 1 -maxdepth 1 -type d -print0 2>/dev/null)

while IFS= read -r -d '' d; do
  name="$(basename "$d")"
  if [[ -n "${source_of[$name]:-}" ]]; then
    echo "WARN: collision: '$name' exists in both global-skills and JEV; using global-skills" >&2
    continue
  fi
  source_of["$name"]="jev"
done < <(find "$JEV_DIR" -mindepth 1 -maxdepth 1 -type d -print0 2>/dev/null)

if [[ ${#source_of[@]} -eq 0 ]]; then
  echo "nothing to sync" >&2
  exit 1
fi

src_for() {
  local name="$1"
  if [[ "${source_of[$name]}" == "global" ]]; then
    echo "$GLOBAL_DIR/$name"
  else
    echo "$JEV_DIR/$name"
  fi
}

linked=0
skipped=0
for target in "${TARGETS[@]}"; do
  mkdir -p "$target"
  for name in $(printf '%s\n' "${!source_of[@]}" | sort); do
    src="$(src_for "$name")"
    dest="$target/$name"
    if [[ -L "$dest" ]]; then
      if [[ "$(readlink -f "$dest")" == "$(readlink -f "$src")" ]]; then
        continue
      fi
      rm "$dest"
    elif [[ -e "$dest" ]]; then
      echo "SKIP: $dest exists and is not a managed symlink" >&2
      skipped=$((skipped + 1))
      continue
    fi
    ln -s "$src" "$dest"
    echo "linked: $dest -> $src"
    linked=$((linked + 1))
  done
done

echo "sync complete: $linked linked, $skipped skipped"