#!/usr/bin/env bash
# deploy.sh - Build and deploy to orphan deploy branch
# Usage: ./deploy.sh [commit-message]

set -e

COMMIT_MSG="${1:-Deploy: $(date +'%Y-%m-%d %H:%M:%S')}"

echo "📦 Building site on main branch..."
bun run build

if [ ! -d "build" ]; then
  echo "❌ Build failed - build directory not found"
  exit 1
fi

echo "✅ Build successful"
echo ""
echo "🔄 Switching to deploy branch..."
git checkout deploy

echo "🧹 Cleaning deploy branch (keeping .git and .gitignore)..."
# Remove all tracked files except .gitignore
git ls-files | grep -v "^\.gitignore$" | xargs -r git rm -f
# Remove any untracked files/directories except build/, node_modules/, and .svelte-kit/
find . -mindepth 1 -maxdepth 1 ! -name 'build' ! -name 'node_modules' ! -name '.svelte-kit' ! -name '.git' ! -name '.gitignore' -exec rm -rf {} +

echo "📋 Copying build output to root..."
if [ -d "build" ]; then
  mv build/* .
  rm -rf build/
  echo "✅ Build files copied to deploy branch root"
else
  echo "⚠️  No build directory found (this is expected on deploy branch)"
fi

echo "📝 Staging changes..."
git add -A

# Check if there are any changes to commit
if git diff --staged --quiet; then
  echo "ℹ️  No changes to deploy"
  git checkout main
  exit 0
fi

echo "💾 Committing build artifacts..."
git commit -m "$COMMIT_MSG"

echo "🚀 Pushing to origin/deploy..."
git push origin deploy

echo "✅ Switching back to main..."
git checkout main

echo ""
echo "✨ Deployment complete!"
echo "   Deploy branch commit: $(git rev-parse --short deploy)"
echo "   Main branch commit: $(git rev-parse --short main)"