require('bare-process/global')
const test = require('brittle')
const { HyperP2PSlaBudget, PROTOCOL } = require('../index.js')

test('exports', (t) => {
  t.ok(HyperP2PSlaBudget)
  t.is(PROTOCOL, 'sla-budget/v1')
})

test('allocate consume remaining', async (t) => {
  const m = new HyperP2PSlaBudget()
  m.allocate('api', 10)
  t.ok(m.consume('api', 3))
  t.is(m.remaining('api'), 7)
  await m.close()
})

test('validation', async (t) => {
  const m = new HyperP2PSlaBudget()
  try { m.allocate('', 1) } catch (e) { t.ok(e) }
  await m.close()
})

test('reject over consume', async (t) => {
  const m = new HyperP2PSlaBudget()
  m.allocate('x', 1)
  t.not(m.consume('x', 5))
  await m.close()
})

test('getStats', async (t) => {
  const m = new HyperP2PSlaBudget()
  m.allocate('s', 2)
  t.is(m.getStats().protocol, 'sla-budget/v1')
  t.is(m.getStats().allocated, 1)
  await m.close()
})

test('transfer and snapshots', async (t) => {
  const m = new HyperP2PSlaBudget()
  m.allocate('a', 10)
  t.ok(m.transfer('a', 'b', 4))
  t.is(m.remaining('a'), 6)
  t.is(m.remaining('b'), 4)
  t.ok(m.usageRatio('a') > 0)
  t.is(m.allSnapshots().length, 2)
  await m.close()
})

test('canConsume totalRemaining', async (t) => {
  const m = new HyperP2PSlaBudget()
  m.allocate('a', 5)
  m.allocate('b', 3)
  t.ok(m.canConsume('a', 4))
  t.not(m.canConsume('a', 6))
  t.is(m.totalRemaining(), 8)
  await m.close()
})