import { deepStrictEqual } from 'assert'
import rmrf from 'rimraf'
import { Log, Entry } from '../../../src/oplog/index.js'
import { KeyValue, KeyValuePersisted, Database } from '../../../src/db/index.js'
import { config, testAPIs, startIpfs, stopIpfs } from 'orbit-db-test-utils'
import connectPeers from '../../utils/connect-nodes.js'
import waitFor from '../../utils/wait-for.js'
import { createTestIdentities, cleanUpTestIdentities } from '../../fixtures/orbit-db-identity-keys.js'

const OpLog = { Log, Entry }

Object.keys(testAPIs).forEach((IPFS) => {
  describe('KeyValue Database Replication (' + IPFS + ')', function () {
    this.timeout(config.timeout)

    let ipfsd1, ipfsd2
    let ipfs1, ipfs2
    let identities1, identities2
    let testIdentity1, testIdentity2
    let kv1, kv2

    const databaseId = 'kv-AAA'

    const accessController = {
      canAppend: async (entry) => {
        const identity = await identities1.getIdentity(entry.identity)
        return identity.id === testIdentity1.id
      }
    }

    before(async () => {
      ipfsd1 = await startIpfs(IPFS, config.daemon1)
      ipfsd2 = await startIpfs(IPFS, config.daemon2)
      ipfs1 = ipfsd1.api
      ipfs2 = ipfsd2.api

      await connectPeers(ipfs1, ipfs2)

      const [identities, testIdentities] = await createTestIdentities(ipfs1, ipfs2)
      identities1 = identities[0]
      identities2 = identities[1]
      testIdentity1 = testIdentities[0]
      testIdentity2 = testIdentities[1]

      await rmrf('./orbitdb1')
      await rmrf('./orbitdb2')
    })

    after(async () => {
      await cleanUpTestIdentities([identities1, identities2])

      if (ipfsd1) {
        await stopIpfs(ipfsd1)
      }
      if (ipfsd2) {
        await stopIpfs(ipfsd2)
      }

      await rmrf('./orbitdb1')
      await rmrf('./orbitdb2')
    })

    afterEach(async () => {
      if (kv1) {
        await kv1.drop()
        await kv1.close()
      }
      if (kv2) {
        await kv2.drop()
        await kv2.close()
      }
    })

    it('replicates a database', async () => {
      let connected = false
      let updateCount = 0

      const onConnected = async (peerId) => {
        connected = true
      }

      const onUpdate = (entry) => {
        ++updateCount
      }

      const onError = (err) => {
        console.error(err)
      }

      kv1 = await KeyValuePersisted({ KeyValue, OpLog, Database, ipfs: ipfs1, identity: testIdentity1, address: databaseId, accessController, directory: './orbitdb1' })
      kv2 = await KeyValuePersisted({ KeyValue, OpLog, Database, ipfs: ipfs2, identity: testIdentity2, address: databaseId, accessController, directory: './orbitdb2' })

      kv2.events.on('join', onConnected)
      kv1.events.on('join', onConnected)
      kv2.events.on('update', onUpdate)
      kv2.events.on('error', onError)
      kv1.events.on('error', onError)

      await kv1.set('init', true)
      await kv1.set('hello', 'friend')
      await kv1.del('hello')
      await kv1.set('hello', 'friend2')
      await kv1.del('hello')
      await kv1.set('empty', '')
      await kv1.del('empty')
      await kv1.set('hello', 'friend3')

      await waitFor(() => connected, () => true)
      await waitFor(() => updateCount > 0, () => true)

      const value0 = await kv2.get('init')
      deepStrictEqual(value0, true)

      const value2 = await kv2.get('hello')
      deepStrictEqual(value2, 'friend3')

      const value1 = await kv1.get('hello')
      deepStrictEqual(value1, 'friend3')

      const value9 = await kv1.get('empty')
      deepStrictEqual(value9, undefined)

      const all2 = []
      for await (const keyValue of kv2.iterator()) {
        all2.push(keyValue)
      }
      deepStrictEqual(all2, [
        { key: 'hello', value: 'friend3' },
        { key: 'init', value: true }
      ])

      const all1 = []
      for await (const keyValue of kv1.iterator()) {
        all1.push(keyValue)
      }
      deepStrictEqual(all1, [
        { key: 'hello', value: 'friend3' },
        { key: 'init', value: true }
      ])
    })

    it('loads the database after replication', async () => {
      let updateCount = 0
      let connected = false

      const onConnected = async (peerId) => {
        connected = true
      }

      const onUpdate = (entry) => {
        ++updateCount
      }

      const onError = (err) => {
        console.error(err)
      }

      kv1 = await KeyValuePersisted({ KeyValue, OpLog, Database, ipfs: ipfs1, identity: testIdentity1, address: databaseId, accessController, directory: './orbitdb1' })
      kv2 = await KeyValuePersisted({ KeyValue, OpLog, Database, ipfs: ipfs2, identity: testIdentity2, address: databaseId, accessController, directory: './orbitdb2' })

      kv2.events.on('join', onConnected)
      kv1.events.on('join', onConnected)
      kv2.events.on('update', onUpdate)
      kv2.events.on('error', onError)
      kv1.events.on('error', onError)

      await kv1.set('init', true)
      await kv1.set('hello', 'friend')
      await kv1.del('hello')
      await kv1.set('hello', 'friend2')
      await kv1.del('hello')
      await kv1.set('empty', '')
      await kv1.del('empty')
      await kv1.set('hello', 'friend3')

      await waitFor(() => connected, () => true)
      await waitFor(() => updateCount > 0, () => true)

      await kv1.close()
      await kv2.close()

      kv1 = await KeyValuePersisted({ KeyValue, OpLog, Database, ipfs: ipfs1, identity: testIdentity1, address: databaseId, accessController, directory: './orbitdb1' })
      kv2 = await KeyValuePersisted({ KeyValue, OpLog, Database, ipfs: ipfs2, identity: testIdentity2, address: databaseId, accessController, directory: './orbitdb2' })

      const value0 = await kv2.get('init')
      deepStrictEqual(value0, true)

      const value2 = await kv2.get('hello')
      deepStrictEqual(value2, 'friend3')

      const value1 = await kv1.get('hello')
      deepStrictEqual(value1, 'friend3')

      const value9 = await kv1.get('empty')
      deepStrictEqual(value9, undefined)

      const all2 = []
      for await (const keyValue of kv2.iterator()) {
        all2.push(keyValue)
      }
      deepStrictEqual(all2, [
        { key: 'hello', value: 'friend3' },
        { key: 'init', value: true }
      ])

      const all1 = []
      for await (const keyValue of kv1.iterator()) {
        all1.push(keyValue)
      }
      deepStrictEqual(all1, [
        { key: 'hello', value: 'friend3' },
        { key: 'init', value: true }
      ])
    })
  })
})