import { PrismaClient } from "@prisma/client";
import { PrismaPg } from "@prisma/adapter-pg";

declare global {
  // eslint-disable-next-line no-var
  var prismaGlobal: PrismaClient | undefined;
}

/**
 * Rust-free Prisma client over node-postgres (no native engine binary needed,
 * which also makes shared/VPS hosting simpler).
 */
export function createPrisma(url = process.env.DATABASE_URL) {
  if (!url) throw new Error("DATABASE_URL is not set");
  return new PrismaClient({ adapter: new PrismaPg({ connectionString: url }) });
}

function instance(): PrismaClient {
  if (!global.prismaGlobal) global.prismaGlobal = createPrisma();
  return global.prismaGlobal;
}

/** Lazily created so importing this module never needs DATABASE_URL (tests, build). */
const prisma = new Proxy({} as PrismaClient, {
  get(_t, prop) {
    const db = instance();
    const v = Reflect.get(db, prop);
    return typeof v === "function" ? v.bind(db) : v;
  },
});

export default prisma;