#!/usr/bin/env bash
set -euo pipefail

usage() {
  cat <<'USAGE'
Usage: ./install.sh [--codex] [--claude] [--all] [--agents] [--force] [--list]

Installs the Makepad game skills from this directory into local agent skill
directories.

Recommended:
  ./install.sh --codex
  ./install.sh --claude
  ./install.sh --all

Targets:
  --codex   Install into ${CODEX_HOME:-$HOME/.codex}/skills
  --claude  Install into ${CLAUDE_SKILLS_DIR:-$HOME/.claude/skills}
  --all     Install into Codex and Claude

Advanced:
  --agents  Install into ${AGENTS_SKILLS_DIR:-$HOME/.agents/skills}
            Only for agent surfaces that read .agents/skills without also
            reading Codex or Claude skills, otherwise skills can duplicate.

Options:
  --force   Replace same-named skills in the target directory
  --list    List the skills in this pack and exit
USAGE
}

script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
codex="false"; claude="false"; agents="false"; force="false"; list="false"

while [[ $# -gt 0 ]]; do
  case "$1" in
    --codex)  codex="true" ;;
    --claude) claude="true" ;;
    --agents) agents="true" ;;
    --all)    codex="true"; claude="true" ;;
    --force)  force="true" ;;
    --list)   list="true" ;;
    -h|--help) usage; exit 0 ;;
    *) printf 'unknown option: %s\n\n' "$1" >&2; usage >&2; exit 2 ;;
  esac
  shift
done

mapfile -t skills < <(find "$script_dir" -mindepth 1 -maxdepth 1 -type d -name 'makepad-*' -printf '%f\n' | sort)

if [[ "${#skills[@]}" -eq 0 ]]; then
  echo "no makepad-* skills found in $script_dir" >&2
  exit 1
fi

if [[ "$list" == "true" ]]; then
  printf 'Makepad game skills (%d):\n' "${#skills[@]}"
  for s in "${skills[@]}"; do
    desc=$(sed -n 's/^description:[[:space:]]*"\{0,1\}\(.\{0,70\}\).*/\1/p' "$script_dir/$s/SKILL.md" | head -1)
    printf '  %-32s %s...\n' "$s" "$desc"
  done
  exit 0
fi

if [[ "$codex" == "false" && "$claude" == "false" && "$agents" == "false" ]]; then
  usage >&2
  exit 2
fi

install_into() {
  local dest="$1" label="$2" installed=0 skipped=0
  mkdir -p "$dest"
  for s in "${skills[@]}"; do
    if [[ -e "$dest/$s" && "$force" != "true" ]]; then
      printf '  skip    %s (exists; --force to replace)\n' "$s"
      skipped=$((skipped + 1))
      continue
    fi
    rm -rf "$dest/$s"
    cp -R "$script_dir/$s" "$dest/$s"
    printf '  install %s\n' "$s"
    installed=$((installed + 1))
  done
  printf '%s: %d installed, %d skipped -> %s\n\n' "$label" "$installed" "$skipped" "$dest"
}

[[ "$codex"  == "true" ]] && install_into "${CODEX_HOME:-$HOME/.codex}/skills"        "Codex"
[[ "$claude" == "true" ]] && install_into "${CLAUDE_SKILLS_DIR:-$HOME/.claude/skills}" "Claude Code"
[[ "$agents" == "true" ]] && install_into "${AGENTS_SKILLS_DIR:-$HOME/.agents/skills}" "Agents"

echo "Done. Start with makepad-game-director; it routes the siblings itself."