#!/bin/bash
#
# Dataflow Uninstall Script
# Removes database user, database, and optionally .env
#

echo "⚠️  Dataflow Uninstall"
echo "====================="
echo ""

# Load .env if it exists
if [ -f .env ]; then
    export $(cat .env | grep -v '^#' | xargs)
fi

DB_NAME=${DB_NAME:-dataflow}
DB_USER=${DB_USER:-dataflow}

echo "⚠️  This will permanently delete:"
echo "  - Database: $DB_NAME"
echo "  - User: $DB_USER"
echo ""
read -p "Type 'delete' to confirm: " CONFIRM
if [ "$CONFIRM" != "delete" ]; then
    echo "Cancelled."
    exit 0
fi

# Prompt for admin credentials
echo ""
echo "📋 PostgreSQL Admin Credentials"
echo ""
read -p "Admin username [postgres]: " ADMIN_USER
ADMIN_USER=${ADMIN_USER:-postgres}
read -s -p "Admin password: " ADMIN_PASS
echo ""

DB_HOST=${DB_HOST:-localhost}
DB_PORT=${DB_PORT:-5432}
DB_NAME=${DB_NAME:-dataflow}
DB_USER=${DB_USER:-dataflow}

# Test admin connection
echo ""
echo "🔍 Testing PostgreSQL admin connection..."
export PGPASSWORD="$ADMIN_PASS"
if ! psql -U "$ADMIN_USER" -h "$DB_HOST" -p "$DB_PORT" -d postgres -c '\q' 2>/dev/null; then
    echo "✗ Cannot connect to PostgreSQL"
    exit 1
fi
echo "✓ Connected"

# Drop database
echo ""
echo "🗄️  Dropping database..."
psql -U "$ADMIN_USER" -h "$DB_HOST" -p "$DB_PORT" -d postgres -c "DROP DATABASE IF EXISTS $DB_NAME;" 2>/dev/null || true
echo "✓ Database dropped"

# Drop user
echo ""
echo "👤 Dropping user..."
psql -U "$ADMIN_USER" -h "$DB_HOST" -p "$DB_PORT" -d postgres -c "DROP USER IF EXISTS $DB_USER;" 2>/dev/null || true
echo "✓ User dropped"

unset PGPASSWORD

# Optionally remove .env
echo ""
read -p "Remove .env file? [y/N]: " REMOVE_ENV
if [ "$REMOVE_ENV" == "y" ] || [ "$REMOVE_ENV" == "Y" ]; then
    rm -f .env
    echo "✓ .env removed"
fi

# Optionally remove node_modules
echo ""
read -p "Remove node_modules? [y/N]: " REMOVE_MODULES
if [ "$REMOVE_MODULES" == "y" ] || [ "$REMOVE_MODULES" == "Y" ]; then
    rm -rf node_modules
    echo "✓ node_modules removed"
fi

echo ""
echo "✅ Uninstall complete!"
echo ""