#!/usr/bin/env bash
# agent-goal-skill — one-liner installer for Claude Code, Codex, Kimi, Droid, Auggie
#
# Detects which CLI agents are installed and clones the skill into each one's
# skill directory. Idempotent — safe to re-run.

set -euo pipefail

REPO_URL="${AGENT_GOAL_SKILL_REPO:-https://github.com/dallionking/agent-goal-skill.git}"
SKILL_NAME="agent-goal-skill"

declare -A TARGETS=(
  [claude-code]="$HOME/.claude/skills/$SKILL_NAME"
  [codex]="$HOME/.codex/skills/$SKILL_NAME"
  [kimi]="$HOME/.kimi/skills/$SKILL_NAME"
  [droid]="$HOME/.factory/skills/$SKILL_NAME"
  [auggie]="$HOME/.augment/skills/$SKILL_NAME"
)

is_installed() {
  local agent="$1"
  case "$agent" in
    claude-code) command -v claude >/dev/null 2>&1 ;;
    codex)       command -v codex >/dev/null 2>&1 ;;
    kimi)        command -v kimi >/dev/null 2>&1 ;;
    droid)       command -v droid >/dev/null 2>&1 ;;
    auggie)      command -v auggie >/dev/null 2>&1 ;;
    *)           return 1 ;;
  esac
}

install_to() {
  local agent="$1"
  local target="${TARGETS[$agent]}"
  local parent
  parent="$(dirname "$target")"

  mkdir -p "$parent"

  if [ -d "$target/.git" ]; then
    echo "  [$agent] already installed → updating..."
    git -C "$target" pull --ff-only
  elif [ -d "$target" ]; then
    echo "  [$agent] non-git directory exists — skipping (move or delete it first)"
    return 0
  else
    echo "  [$agent] installing → $target"
    git clone --quiet "$REPO_URL" "$target"
  fi
  echo "  [$agent] ✓"
}

echo "agent-goal-skill installer"
echo "Repo: $REPO_URL"
echo

installed_any=0
for agent in "${!TARGETS[@]}"; do
  if is_installed "$agent"; then
    install_to "$agent"
    installed_any=1
  fi
done

if [ "$installed_any" -eq 0 ]; then
  echo "No supported CLI agent detected. Install one of: claude, codex, kimi, droid, auggie."
  echo "Or set target manually: git clone $REPO_URL <your-skills-dir>/$SKILL_NAME"
  exit 1
fi

echo
echo "Done. Restart your agent and invoke: /$SKILL_NAME <rough goal description>"