import { bench, describe } from 'vitest'
import { InMemoryKVDriver } from '../src/kv/memory.js'
import { KVStorage } from '../src/kv/node.js'
import { KVEventStorage } from '../src/events/kv.js'

const events = new KVEventStorage(new KVStorage(new InMemoryKVDriver()))
const streams = events.child('streams')
const long = streams.child('long')
for (let i = 0; i < 10_000; i++) await long.append([{ type: 'tick', i }])
let s = 0

describe('events', () => {
  bench('append 1 event (warm head cache)', async () => {
    await streams.append(`s${s++ % 1000}`, [{ type: 'e' }])
  })
  bench('read 100 events from version 5000 of 10k', async () => {
    for await (const _ of long.read({ from: 5000, limit: 100 })) {
    }
  })
  bench('read full 10k-event stream', async () => {
    for await (const _ of long.read()) {
    }
  })
  bench('version() (cold head lookup)', async () => {
    await long.version()
  })
})