#!/bin/bash
# Migrate from pnpm to Bun package manager
# This script cleans node_modules and reinstalls with Bun

set -euo pipefail

CODEBASE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../codebase" && pwd)"

echo "=== Bun Migration Script ==="
echo "Codebase: $CODEBASE_DIR"
echo ""

# Check if bun is available
if ! command -v bun &> /dev/null; then
    echo "ERROR: Bun is not installed or not in PATH"
    echo "Install with: curl -fsSL https://bun.sh/install | bash"
    exit 1
fi

echo "Bun version: $(bun --version)"
echo ""

# Backup check
if [[ ! -f "$CODEBASE_DIR/pnpm-lock.yaml.backup" ]]; then
    echo "Creating backup of pnpm-lock.yaml..."
    cp "$CODEBASE_DIR/pnpm-lock.yaml" "$CODEBASE_DIR/pnpm-lock.yaml.backup"
fi

echo "Cleaning node_modules..."
cd "$CODEBASE_DIR"

# Remove top-level node_modules first
if [[ -d "node_modules" ]]; then
    rm -rf node_modules
    echo "  Removed: node_modules/"
fi

# Remove nested node_modules
echo "  Cleaning nested node_modules (this may take a moment)..."
find . -type d -name node_modules -prune -exec rm -rf {} + 2>/dev/null || true

echo ""
echo "Installing with Bun..."
bun install

echo ""
echo "=== Migration Complete ==="
echo ""
echo "To verify:"
echo "  ./run dev:status"
echo "  ./run dev"
echo ""
echo "To rollback if needed:"
echo "  rm -rf node_modules bun.lockb"
echo "  mv pnpm-lock.yaml.backup pnpm-lock.yaml"
echo "  pnpm install"