import { migrate } from "drizzle-orm/bun-sqlite/migrator";
import { existsSync } from "node:fs";
import { resolve } from "node:path";
import { db } from "./index";

const MIGRATIONS_FOLDER = resolve(process.cwd(), "drizzle");

/**
 * Run all pending Drizzle migrations at startup.
 *
 * If the migrations folder does not exist yet (e.g. fresh clone before the
 * first `bun run db:generate` has been executed) the function exits silently
 * so that the application can still start in development without crashing.
 */
export function runMigrations(): void {
  if (!existsSync(MIGRATIONS_FOLDER)) {
    console.warn(
      `[migrate] Migrations folder not found at "${MIGRATIONS_FOLDER}". ` +
        "Skipping migrations — run `bun run db:generate` to create migration files.",
    );
    return;
  }

  try {
    migrate(db, { migrationsFolder: MIGRATIONS_FOLDER });
    console.log("[migrate] Database migrations applied successfully.");
  } catch (err) {
    console.error("[migrate] Failed to apply database migrations:", err);
    throw err;
  }
}