#!/usr/bin/env bash
# setup-caveman.sh — idempotent auto-installer for Caveman + RTK token optimization.
# Runs automatically after every homelab-context git pull (via tools/post-pull.sh).
#
# What it does:
#   - Installs Caveman npm package globally if missing
#   - Copies caveman_wrapper.sh → ~/bin/
#   - Copies caveman.js wrapper → ~/bin/caveman (CLI entry point)
#   - Copies templates → ~/templates/
#   - Creates ~/bin/ and ~/templates/ dirs if missing
#   - All operations are idempotent (safe to re-run)
#
# Works on: macOS (Homebrew node) and Linux (system node)

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
CAVEMAN_DIR="$SCRIPT_DIR/caveman"
BIN_DIR="$HOME/bin"
TEMPLATES_DIR="$HOME/templates"

# Colors for output (only when connected to a terminal)
if [ -t 1 ]; then
  GREEN='\033[0;32m'; YELLOW='\033[1;33m'; BLUE='\033[0;34m'; NC='\033[0m'
else
  GREEN=''; YELLOW=''; BLUE=''; NC=''
fi

log()   { echo -e "${BLUE}[caveman]${NC} $1"; }
ok()    { echo -e "${GREEN}[caveman]${NC} $1"; }
skip()  { echo -e "${YELLOW}[caveman]${NC} $1"; }

# --- 1. Check / install node + npm ---
if ! command -v node &>/dev/null; then
  echo "[caveman] node.js not found — skipping caveman install"
  exit 0
fi

# --- 2. Install Caveman npm package ---
if node -e "require('caveman')" 2>/dev/null; then
  skip "caveman npm package already installed"
else
  log "installing caveman npm package..."
  npm install -g caveman 2>&1 | tail -1
  ok "caveman npm package installed"
fi

# --- 3. Create target directories ---
mkdir -p "$BIN_DIR" "$TEMPLATES_DIR"

# --- 4. Install wrapper script ---
install -m 755 "$CAVEMAN_DIR/caveman_wrapper.sh" "$BIN_DIR/caveman_wrapper.sh"
ok "caveman_wrapper.sh → $BIN_DIR/caveman_wrapper.sh"

# --- 5. Install caveman CLI wrapper ---
install -m 755 "$CAVEMAN_DIR/caveman.js" "$BIN_DIR/caveman"
ok "caveman.js → $BIN_DIR/caveman"

# --- 6. Install templates ---
for tmpl in "$CAVEMAN_DIR/templates/"*.txt; do
  [ -f "$tmpl" ] || continue
  cp "$tmpl" "$TEMPLATES_DIR/"
  ok "template → $TEMPLATES_DIR/$(basename "$tmpl")"
done

# --- 7. Verify ---
if [ -x "$BIN_DIR/caveman_wrapper.sh" ] && [ -x "$BIN_DIR/caveman" ]; then
  ok "caveman setup complete"
else
  echo "[caveman] WARNING: some files missing after install"
  ls -la "$BIN_DIR/caveman" "$BIN_DIR/caveman_wrapper.sh" 2>&1
fi