#!/bin/bash
# Offline import of generated SQL files into PostgreSQL (no network).

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
cd "$SCRIPT_DIR"

echo "=========================================="
echo "📥 Automotive Database Import (offline)"
echo "=========================================="
echo ""

require_file() {
  if [ ! -f "$1" ]; then
    echo "❌ Missing required file: $1"
    exit 1
  fi
}

if ! docker ps --filter "name=mvp-postgres" --format "{{.Names}}" | grep -q "mvp-postgres"; then
    echo "❌ Error: mvp-postgres container is not running"
    exit 1
fi

require_file "output/01_engines.sql"
require_file "output/02_transmissions.sql"
require_file "output/03_vehicle_options.sql"

echo "📋 Step 1: Running database schema migration..."
docker exec -i mvp-postgres psql -U postgres -d motovaultpro < migrations/001_create_vehicle_database.sql
echo "✓ Schema migration completed"
echo ""

echo "🧹 Step 2: Truncating existing data..."
docker exec -i mvp-postgres psql -U postgres -d motovaultpro <<'EOF'
TRUNCATE TABLE vehicle_options RESTART IDENTITY CASCADE;
TRUNCATE TABLE engines RESTART IDENTITY CASCADE;
TRUNCATE TABLE transmissions RESTART IDENTITY CASCADE;
EOF
echo "✓ Tables truncated"
echo ""

echo "📥 Step 3: Importing engines..."
docker exec -i mvp-postgres psql -U postgres -d motovaultpro < output/01_engines.sql
echo "✓ Engines imported"
echo ""

echo "📥 Step 4: Importing transmissions..."
docker exec -i mvp-postgres psql -U postgres -d motovaultpro < output/02_transmissions.sql
echo "✓ Transmissions imported"
echo ""

echo "📥 Step 5: Importing vehicle options (observed pairs only)..."
docker exec -i mvp-postgres psql -U postgres -d motovaultpro < output/03_vehicle_options.sql
echo "✓ Vehicle options imported"
echo ""

echo "=========================================="
echo "✅ Import completed"
echo "=========================================="
echo ""
echo "🔍 Database verification:"
docker exec mvp-postgres psql -U postgres -d motovaultpro -c "SELECT COUNT(*) as engines FROM engines;"
docker exec mvp-postgres psql -U postgres -d motovaultpro -c "SELECT COUNT(*) as transmissions FROM transmissions;"
docker exec mvp-postgres psql -U postgres -d motovaultpro -c "SELECT COUNT(*) as vehicle_options FROM vehicle_options;"
docker exec mvp-postgres psql -U postgres -d motovaultpro -c "SELECT MIN(year) as min_year, MAX(year) as max_year FROM vehicle_options;"
docker exec mvp-postgres psql -U postgres -d motovaultpro -c "SELECT DISTINCT year FROM vehicle_options ORDER BY year LIMIT 5;"
docker exec mvp-postgres psql -U postgres -d motovaultpro -c "SELECT DISTINCT year FROM vehicle_options ORDER BY year DESC LIMIT 5;"
echo ""
echo "✓ Database ready for dropdown use."