#!/usr/bin/env bash
# install.sh — Install the Greyhaven Design System into a consuming project.
#
# Copies (does NOT symlink) files so the consuming project owns its copies.
# Re-run this script to pull updated versions after design system changes.
#
# What it does:
#   1. Copies SKILL.md into .claude/skills/ (for Claude Code)
#   2. Copies AGENTS.md into the project root (standard convention)
#   3. Copies Aspekta font files + font-face.css into public/fonts/
#   4. Prints CSS import + MCP setup instructions
#
# Usage:
#   ./skill/install.sh /path/to/your/project

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
SKILL_FILE="${SCRIPT_DIR}/SKILL.md"
AGENTS_FILE="${SCRIPT_DIR}/AGENTS.md"
FONTS_DIR="${REPO_ROOT}/public/fonts"

if [ $# -ge 1 ]; then
  TARGET_PROJECT="$(cd "$1" && pwd)"
else
  echo "Usage: $0 <target-project-directory>"
  echo ""
  echo "Example:"
  echo "  $0 /path/to/my-app"
  echo "  $0 ."
  exit 1
fi

if [ ! -d "$TARGET_PROJECT" ]; then
  echo "Error: Directory not found: ${TARGET_PROJECT}"
  exit 1
fi

# Helper: backup existing file/symlink and copy new one
copy_with_backup() {
  local src="$1"
  local dst="$2"

  if [ -L "$dst" ]; then
    # Remove any existing symlink (leftover from old installs)
    rm "$dst"
  elif [ -f "$dst" ]; then
    mv "$dst" "${dst}.bak"
    echo "      (backed up existing file to $(basename "${dst}.bak"))"
  fi

  cp "$src" "$dst"
}

echo "Installing Greyhaven Design System into ${TARGET_PROJECT}"
echo ""

# ── 1. SKILL.md ────────────────────────────────────────────────────────────
if [ -f "$SKILL_FILE" ]; then
  SKILLS_DIR="${TARGET_PROJECT}/.claude/skills"
  mkdir -p "$SKILLS_DIR"
  DST="${SKILLS_DIR}/greyhaven-design-system.md"
  copy_with_backup "$SKILL_FILE" "$DST"
  echo "[ok] SKILL.md:      ${DST}"
else
  echo "[skip] SKILL.md not found — run 'pnpm skill:build' first"
fi

# ── 2. AGENTS.md ───────────────────────────────────────────────────────────
if [ -f "$AGENTS_FILE" ]; then
  DST="${TARGET_PROJECT}/AGENTS.md"
  copy_with_backup "$AGENTS_FILE" "$DST"
  echo "[ok] AGENTS.md:     ${DST}"
else
  echo "[skip] AGENTS.md not found — run 'pnpm skill:build' first"
fi

# ── 3. Fonts ───────────────────────────────────────────────────────────────
if [ -d "$FONTS_DIR" ]; then
  TARGET_FONTS="${TARGET_PROJECT}/public/fonts"
  mkdir -p "$TARGET_FONTS"

  copied=0
  for f in "$FONTS_DIR"/Aspekta-*.woff2; do
    [ -f "$f" ] || continue
    cp "$f" "$TARGET_FONTS/"
    copied=$((copied + 1))
  done

  if [ -f "$FONTS_DIR/font-face.css" ]; then
    cp "$FONTS_DIR/font-face.css" "$TARGET_FONTS/"
  fi

  echo "[ok] Fonts:         ${copied} Aspekta woff2 files copied to ${TARGET_FONTS}/"
else
  echo "[skip] Fonts dir not found at ${FONTS_DIR}"
fi

# ── Next steps ─────────────────────────────────────────────────────────────
cat <<'EOF'

Done!

─── Next steps ────────────────────────────────────────────────────────────

1. Add Aspekta @font-face to your global CSS:

   @font-face { font-family: 'Aspekta'; font-weight: 400; font-display: swap; src: url('/fonts/Aspekta-400.woff2') format('woff2'); }
   @font-face { font-family: 'Aspekta'; font-weight: 500; font-display: swap; src: url('/fonts/Aspekta-500.woff2') format('woff2'); }
   @font-face { font-family: 'Aspekta'; font-weight: 600; font-display: swap; src: url('/fonts/Aspekta-600.woff2') format('woff2'); }
   @font-face { font-family: 'Aspekta'; font-weight: 700; font-display: swap; src: url('/fonts/Aspekta-700.woff2') format('woff2'); }

   (Or import the full set: @import url('/fonts/font-face.css');)

   And set the font stack:
   --font-sans: 'Aspekta', ui-sans-serif, system-ui, sans-serif;

2. (Optional) Register the Greyhaven MCP server. Create .mcp.json in your
   project root:

   {
     "mcpServers": {
       "greyhaven": {
         "command": "npx",
         "args": ["tsx", "<ABSOLUTE_PATH_TO_GREYHAVEN_REPO>/mcp/server.ts"]
       }
     }
   }

3. Re-run this script after design system updates to refresh your copies.

EOF