// Untyped storage — any key, any value
export class Counter {
  async fetch(request: Request) {
    const count = (await this.state.storage.get("count")) as number | undefined
    await this.state.storage.put("count", (count ?? 0) + 1)
    return new Response(String((count ?? 0) + 1))
  }
}

// Calling a DO from a Worker — manual fetch, manual JSON parsing
const id = env.COUNTER.idFromName("global")
const stub = env.COUNTER.get(id)
const resp = await stub.fetch(new Request("https://do/increment", {
  method: "POST",
  body: JSON.stringify({ amount: 5 }),
}))
const result = await resp.json()

import { typedStorage, createStateMachine, createDOClient, singleton } from "@workkit/do"

// Typed storage — schema-validated keys and values
const storage = typedStorage<{ count: number; name: string }>(state.storage)
const count = await storage.get("count") // number | undefined
await storage.put("count", 42) // type-checked

// State machine for complex DO logic
const machine = createStateMachine<OrderState, OrderEvent>({
  initial: "pending",
  transitions: {
    pending: { CONFIRM: "confirmed", CANCEL: "cancelled" },
    confirmed: { SHIP: "shipped" },
    shipped: { DELIVER: "delivered" },
  },
})

// RPC-style client — no manual fetch/JSON
interface CounterAPI {
  increment(amount: number): Promise<number>
  getCount(): Promise<number>
}

const counter = createDOClient<CounterAPI>(env.COUNTER, id)
const count = await counter.increment(5) // typed, no fetch boilerplate

// Singleton helper for well-known instances
const globalCounter = singleton<CounterAPI>(env.COUNTER, "global")