setup

#!/usr/bin/env bash
# setup — install agentic-commerce-kit skills into your AI coding agents.
#
# Host-agnostic: skills are plain SKILL.md folders. This installer symlinks (or
# copies) them into each detected agent's skills directory. Re-run after `git pull`.
#
#   ./setup                      install detected hosts (auto-detect)
#   ./setup --host codex         install only for one host
#   ./setup --all                install for every known host (create dirs as needed)
#   ./setup --copy               copy files instead of symlinking (Windows / no symlink)
#   ./setup --uninstall          remove this kit's skills from target hosts
#   ./setup --list               list known hosts and whether each is detected
#   ./setup -h | --help
#
# Add support for another agent: see docs/ADDING_A_HOST.md (one line below).

set -euo pipefail

REPO_DIR="$(cd "$(dirname "$0")" && pwd)"
SKILLS_DIR="$REPO_DIR/skills"

# --- Host registry --------------------------------------------------------
# To add a host: add its name to KNOWN_HOSTS and a case in host_skills_dir().
KNOWN_HOSTS="claude codex cursor opencode factory"

host_skills_dir() {
  case "$1" in
    claude)   echo "$HOME/.claude/skills" ;;
    codex)    echo "$HOME/.codex/skills" ;;
    cursor)   echo "$HOME/.cursor/skills" ;;
    opencode) echo "${XDG_CONFIG_HOME:-$HOME/.config}/opencode/skills" ;;
    factory)  echo "$HOME/.factory/skills" ;;
    *)        return 1 ;;
  esac
}

# A host is "detected" if its base config dir already exists.
host_detected() {
  case "$1" in
    claude)   [ -d "$HOME/.claude" ] ;;
    codex)    [ -d "$HOME/.codex" ] ;;
    cursor)   [ -d "$HOME/.cursor" ] ;;
    opencode) [ -d "${XDG_CONFIG_HOME:-$HOME/.config}/opencode" ] ;;
    factory)  [ -d "$HOME/.factory" ] ;;
    *)        return 1 ;;
  esac
}

# --- Options --------------------------------------------------------------
MODE="install"; ONLY_HOST=""; USE_COPY=0; ALL=0
while [ $# -gt 0 ]; do
  case "$1" in
    --host) ONLY_HOST="${2:-}"; shift 2 ;;
    --all) ALL=1; shift ;;
    --copy) USE_COPY=1; shift ;;
    --uninstall) MODE="uninstall"; shift ;;
    --list) MODE="list"; shift ;;
    -h|--help) sed -n '2,21p' "$0" | sed 's/^# \{0,1\}//'; exit 0 ;;
    *) echo "Unknown option: $1" >&2; exit 2 ;;
  esac
done

skills() { find "$SKILLS_DIR" -mindepth 1 -maxdepth 1 -type d -exec basename {} \; ; }

if [ "$MODE" = "list" ]; then
  echo "Known hosts:"
  for h in $KNOWN_HOSTS; do
    if host_detected "$h"; then echo "  [detected] $h -> $(host_skills_dir "$h")"
    else echo "  [ missing] $h -> $(host_skills_dir "$h")"; fi
  done
  echo; echo "Skills in this kit:"; for s in $(skills); do echo "  - $s"; done
  exit 0
fi

# Which hosts to act on.
TARGETS=""
if [ -n "$ONLY_HOST" ]; then
  host_skills_dir "$ONLY_HOST" >/dev/null 2>&1 || { echo "Unknown host: $ONLY_HOST" >&2; exit 2; }
  TARGETS="$ONLY_HOST"
else
  for h in $KNOWN_HOSTS; do
    if [ "$ALL" = "1" ] || host_detected "$h"; then TARGETS="$TARGETS $h"; fi
  done
fi
[ -n "$(echo "$TARGETS" | tr -d ' ')" ] || { echo "No target hosts (none detected). Use --host <name> or --all."; exit 1; }

install_one() { # host skill
  local dest_dir; dest_dir="$(host_skills_dir "$1")"; local src="$SKILLS_DIR/$2"; local dest="$dest_dir/$2"
  mkdir -p "$dest_dir"
  if [ -e "$dest" ] && [ ! -L "$dest" ]; then
    echo "    skip $2 (a real dir/file already exists at $dest — remove it to reinstall)"; return
  fi
  rm -f "$dest"
  if [ "$USE_COPY" = "1" ]; then cp -R "$src" "$dest"; echo "    copied  $2 -> $dest"
  else ln -s "$src" "$dest"; echo "    linked  $2 -> $dest"; fi
}

uninstall_one() { # host skill
  local dest; dest="$(host_skills_dir "$1")/$2"
  if [ -L "$dest" ]; then rm -f "$dest"; echo "    removed $2 ($dest)"
  elif [ -e "$dest" ]; then echo "    skip $2 (not a symlink — left in place: $dest)"
  fi
}

for h in $TARGETS; do
  echo "$MODE: $h ($(host_skills_dir "$h"))"
  for s in $(skills); do
    if [ "$MODE" = "uninstall" ]; then uninstall_one "$h" "$s"; else install_one "$h" "$s"; fi
  done
done
echo "Done."