import { afterEach, expect, test, vi } from "vitest"

import { Runtime } from "#Source/environment/index.ts"
import { BrowserFetch, generalFetch, NodejsFetch } from "#Source/request/index.ts"

afterEach(() => {
  vi.restoreAllMocks()
})

const runNodejsHandler = <R>(handlers: Runtime.UseRuntimesOptions<R>): R => {
  return handlers.nodejs?.(undefined as never) as R
}

const runBrowserHandler = <R>(handlers: Runtime.UseRuntimesOptions<R>): R => {
  return handlers.browser?.(undefined as never) as R
}

test("generalFetch delegates fetch creation to the runtime-specific handler", () => {
  const options = {
    baseUrl: "https://api.example.com",
    path: "/users",
    method: "get",
  }

  const useRuntimesSpy = vi.spyOn(Runtime, "useRuntimes")

  useRuntimesSpy.mockImplementationOnce(runNodejsHandler)

  const nodejsFetcher = generalFetch(options)

  expect(nodejsFetcher).toBeInstanceOf(NodejsFetch)
  expect(useRuntimesSpy).toHaveBeenCalledTimes(1)

  useRuntimesSpy.mockImplementationOnce(runBrowserHandler)

  const browserFetcher = generalFetch(options)

  expect(browserFetcher).toBeInstanceOf(BrowserFetch)
  expect(useRuntimesSpy).toHaveBeenCalledTimes(2)
})