#!/usr/bin/env bash
# install.sh — Install the Greyhaven Design System into a consuming project.
#
# What it does:
#   1. Symlinks SKILL.md into .claude/skills/ (for Claude Code)
#   2. Symlinks AGENT.md into the project root (for non-Claude AI agents)
#   3. Copies Aspekta font files + @font-face CSS into public/fonts/
#   4. Prints CSS import instructions for the consuming project
#
# 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"
AGENT_FILE="${SCRIPT_DIR}/AGENT.md"
FONTS_DIR="${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

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

# ── 1. Claude Skill ────────────────────────────────────────────────────────
if [ -f "$SKILL_FILE" ]; then
  SKILLS_DIR="${TARGET_PROJECT}/.claude/skills"
  mkdir -p "$SKILLS_DIR"
  LINK_PATH="${SKILLS_DIR}/greyhaven-design-system.md"

  if [ -L "$LINK_PATH" ]; then
    rm "$LINK_PATH"
  elif [ -f "$LINK_PATH" ]; then
    mv "$LINK_PATH" "${LINK_PATH}.bak"
  fi

  ln -s "$SKILL_FILE" "$LINK_PATH"
  echo "[ok] Claude Skill:  ${LINK_PATH} -> ${SKILL_FILE}"
else
  echo "[skip] SKILL.md not found — run 'pnpm skill:build' first"
fi

# ── 2. AGENT.md ────────────────────────────────────────────────────────────
if [ -f "$AGENT_FILE" ]; then
  AGENT_LINK="${TARGET_PROJECT}/AGENT.md"

  if [ -L "$AGENT_LINK" ]; then
    rm "$AGENT_LINK"
  elif [ -f "$AGENT_LINK" ]; then
    mv "$AGENT_LINK" "${AGENT_LINK}.bak"
  fi

  ln -s "$AGENT_FILE" "$AGENT_LINK"
  echo "[ok] AGENT.md:      ${AGENT_LINK} -> ${AGENT_FILE}"
else
  echo "[skip] AGENT.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"

  # Copy only Aspekta woff2 files and the font-face CSS
  copied=0
  for f in "$FONTS_DIR"/Aspekta-*.woff2; do
    [ -f "$f" ] || continue
    cp -n "$f" "$TARGET_FONTS/" 2>/dev/null && copied=$((copied + 1)) || true
  done

  # Copy font-face.css
  if [ -f "$FONTS_DIR/font-face.css" ]; then
    cp -n "$FONTS_DIR/font-face.css" "$TARGET_FONTS/" 2>/dev/null || true
  fi

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

# ── Done ───────────────────────────────────────────────────────────────────
echo ""
echo "Done! Next steps for your project's CSS entry point:"
echo ""
echo "  /* Add these @font-face declarations to your global CSS */"
echo "  @font-face { font-family: 'Aspekta'; font-weight: 400; font-display: swap; src: url('/fonts/Aspekta-400.woff2') format('woff2'); }"
echo "  @font-face { font-family: 'Aspekta'; font-weight: 500; font-display: swap; src: url('/fonts/Aspekta-500.woff2') format('woff2'); }"
echo "  @font-face { font-family: 'Aspekta'; font-weight: 600; font-display: swap; src: url('/fonts/Aspekta-600.woff2') format('woff2'); }"
echo "  @font-face { font-family: 'Aspekta'; font-weight: 700; font-display: swap; src: url('/fonts/Aspekta-700.woff2') format('woff2'); }"
echo ""
echo "  /* Or import the full set: */"
echo "  @import url('/fonts/font-face.css');"
echo ""
echo "  /* Set your font stack: */"
echo "  --font-sans: 'Aspekta', ui-sans-serif, system-ui, sans-serif;"