#!/bin/sh
# Sync agent skills with .chezmoidata/skills.yaml through the Skills CLI:
# install every declared skill (one `skills add` per source), then remove
# skills a previous run installed that are no longer declared.
# skills hash: {{ .skills | toJson | sha256sum }}
set -u

command -v npx >/dev/null 2>&1 || { echo "warning: npx not found — skipping skills sync" >&2; exit 0; }

src={{ .chezmoi.sourceDir | quote }}
state=${XDG_STATE_HOME:-$HOME/.local/state}/chezmoi/skills.txt
declared='{{ range .skills.sources }}{{ range .skills }} {{ . }}{{ end }}{{ end }} '

skills() { npx -y {{ .skills.cli | quote }} "$@" </dev/null; }

# Leftovers from when skills were vendored in this repo (chezmoi symlink mode):
# skill dirs whose files are symlinks into the source tree, and the old lock
# symlink. Drop them so the CLI writes real copies instead of writing through
# the links into the repo.
for dir in "$HOME/.agents/skills"/* "$HOME/.claude/skills"/*; do
    [ -d "$dir" ] && [ ! -L "$dir" ] || continue
    if [ -n "$(find "$dir" -type l -lname "$src/*" -print -quit)" ]; then
        rm -rf "$dir"
    fi
done
lock=$HOME/.agents/.skill-lock.json
if [ -L "$lock" ]; then
    case $(readlink "$lock") in "$src"/*) rm -f "$lock" ;; esac
fi

# Remove what the last sync installed but skills.yaml no longer lists.
stale=''
if [ -f "$state" ]; then
    while IFS= read -r name; do
        case $declared in *" $name "*) ;; *) stale="$stale $name" ;; esac
    done <"$state"
fi
if [ -n "$stale" ]; then
    echo "skills: removing$stale"
    # shellcheck disable=SC2086 # one word per skill name
    skills remove -g -y $stale || echo "warning: skills remove failed:$stale" >&2
fi

failed=''
log=$(mktemp)
trap 'rm -f "$log"' EXIT
add() {
    source=$1 agents=$2
    shift 2
    echo "skills: $source → $*"
    # shellcheck disable=SC2086 # agents is a space-separated list
    if ! skills add "$source" -g -y -a $agents --skill "$@" >"$log" 2>&1; then
        failed="$failed $source"
        tail -n 8 "$log" >&2
    fi
}
{{ range .skills.sources -}}
{{ $agents := $.skills.agents -}}
{{ if hasKey . "agents" }}{{ $agents = .agents }}{{ end -}}
add {{ .source | quote }} {{ $agents | join " " | quote }}{{ range .skills }} {{ . | quote }}{{ end }}
{{ end -}}

mkdir -p "$(dirname "$state")"
printf '%s\n' $declared >"$state"

if [ -n "$failed" ]; then
    # Non-zero keeps the old hash, so the next `chezmoi apply` retries.
    echo "error: skills add failed for:$failed" >&2
    exit 1
fi