import { strictEqual, notStrictEqual } from 'assert'
import rmrf from 'rimraf'
import fs from 'fs'
import path from 'path'
import * as IPFS from 'ipfs-core'
import { OrbitDB, isIdentity } from '../src/index.js'
import config from './config.js'
import connectPeers from './utils/connect-nodes.js'

const isBrowser = () => typeof window !== 'undefined'

describe('OrbitDB', function () {
  this.timeout(5000)

  let ipfs1, ipfs2
  let orbitdb1

  before(async () => {
    ipfs1 = await IPFS.create({ ...config.daemon1, repo: './ipfs1' })
    ipfs2 = await IPFS.create({ ...config.daemon2, repo: './ipfs2' })
    await connectPeers(ipfs1, ipfs2)
  })

  after(async () => {
    if (ipfs1) {
      await ipfs1.stop()
    }
    if (ipfs2) {
      await ipfs2.stop()
    }
    await rmrf('./ipfs1')
    await rmrf('./ipfs2')
  })

  describe('OrbitDB instance creation - defaults', () => {
    before(async () => {
      await rmrf('./orbitdb')
      orbitdb1 = await OrbitDB({ ipfs: ipfs1 })
    })

    after(async () => {
      if (orbitdb1) {
        await orbitdb1.stop()
      }
      await rmrf('./orbitdb')
    })

    it('has an IPFS instance', async () => {
      notStrictEqual(orbitdb1.ipfs, undefined)
      strictEqual(typeof orbitdb1.ipfs, 'object')
    })

    it('has the IPFS instance given as a parameter', async () => {
      const { id: expectedId } = await ipfs1.id()
      const { id: resultId } = await orbitdb1.ipfs.id()
      strictEqual(expectedId, resultId)
    })

    it('has a directory', async () => {
      notStrictEqual(orbitdb1.directory, undefined)
      strictEqual(typeof orbitdb1.directory, 'string')
    })

    it('has the directory given as a parameter', async () => {
      strictEqual(orbitdb1.directory, './orbitdb')
    })

    it('has a keystore', async () => {
      notStrictEqual(orbitdb1.keystore, undefined)
      strictEqual(typeof orbitdb1.keystore, 'object')
    })

    it('has a keystore that contains a private key for the created identity', async () => {
      const privateKey = await orbitdb1.keystore.getKey(orbitdb1.identity.id)
      notStrictEqual(privateKey, undefined)
      strictEqual(privateKey.constructor.name, 'Secp256k1PrivateKey')
      notStrictEqual(privateKey._key, undefined)
      notStrictEqual(privateKey._publicKey, undefined)
    })

    it('has a keystore that contains a public key that matches the identity\'s public key', async () => {
      const privateKey = await orbitdb1.keystore.getKey(orbitdb1.identity.id)
      const publicKey = await orbitdb1.keystore.getPublic(privateKey)
      notStrictEqual(publicKey, undefined)
      strictEqual(typeof publicKey, 'string')
      strictEqual(publicKey, orbitdb1.identity.publicKey)
    })

    it('creates a directory for the keystore', async () => {
      const directoryExists = fs.existsSync(path.join('./orbitdb/keystore'))
      strictEqual(directoryExists, true)
    })

    it('has an identity', async () => {
      notStrictEqual(orbitdb1.identity, undefined)
      strictEqual(typeof orbitdb1.identity, 'object')
    })

    it('creates a valid identity', async () => {
      strictEqual(isIdentity(orbitdb1.identity), true)
    })

    it('has a peerId', async () => {
      notStrictEqual(orbitdb1.peerId, undefined)
    })

    it('has a peerId of type Ed25519PeerIdImpl', async () => {
      strictEqual(orbitdb1.peerId.constructor.name, 'Ed25519PeerIdImpl')
    })

    it('has a peerId that matches the IPFS id', async () => {
      const { id } = await ipfs1.id()
      strictEqual(orbitdb1.peerId, id)
    })

    it('has an open function', async () => {
      notStrictEqual(orbitdb1.open, undefined)
      strictEqual(typeof orbitdb1.open, 'function')
    })

    it('has a stop function', async () => {
      notStrictEqual(orbitdb1.stop, undefined)
      strictEqual(typeof orbitdb1.stop, 'function')
    })
  })

  describe('OrbitDB instance creation - user given parameters', () => {
    before(async () => {
      await rmrf('./orbitdb1')
      orbitdb1 = await OrbitDB({ ipfs: ipfs1, id: 'user1', directory: './orbitdb1' })
    })

    after(async () => {
      if (orbitdb1) {
        await orbitdb1.stop()
      }
      await rmrf('./orbitdb1')
    })

    it('has an IPFS instance', async () => {
      notStrictEqual(orbitdb1.ipfs, undefined)
      strictEqual(typeof orbitdb1.ipfs, 'object')
    })

    it('has the IPFS instance given as a parameter', async () => {
      const { id: expectedId } = await ipfs1.id()
      const { id: resultId } = await orbitdb1.ipfs.id()
      strictEqual(expectedId, resultId)
    })

    it('has a directory', async () => {
      notStrictEqual(orbitdb1.directory, undefined)
      strictEqual(typeof orbitdb1.directory, 'string')
    })

    it('has the directory given as a parameter', async () => {
      strictEqual(orbitdb1.directory, './orbitdb1')
    })

    it('has a keystore', async () => {
      notStrictEqual(orbitdb1.keystore, undefined)
      strictEqual(typeof orbitdb1.keystore, 'object')
    })

    it('has a keystore that contains a private key for the created identity', async () => {
      const privateKey = await orbitdb1.keystore.getKey(orbitdb1.identity.id)
      notStrictEqual(privateKey, undefined)
      strictEqual(privateKey.constructor.name, 'Secp256k1PrivateKey')
      notStrictEqual(privateKey._key, undefined)
      notStrictEqual(privateKey._publicKey, undefined)
    })

    it('has a keystore that contains a public key that matches the identity\'s public key', async () => {
      const privateKey = await orbitdb1.keystore.getKey(orbitdb1.identity.id)
      const publicKey = await orbitdb1.keystore.getPublic(privateKey)
      notStrictEqual(publicKey, undefined)
      strictEqual(typeof publicKey, 'string')
      strictEqual(publicKey, orbitdb1.identity.publicKey)
    })

    it('creates a directory for the keystore', async () => {
      const directoryExists = fs.existsSync(path.join('./orbitdb1/keystore'))
      strictEqual(directoryExists, true)
    })

    it('has an identity', async () => {
      notStrictEqual(orbitdb1.identity, undefined)
      strictEqual(typeof orbitdb1.identity, 'object')
    })

    it('creates a valid identity', async () => {
      strictEqual(isIdentity(orbitdb1.identity), true)
    })

    it('has a peerId', async () => {
      notStrictEqual(orbitdb1.peerId, undefined)
    })

    it('has a peerId of type Ed25519PeerIdImpl', async () => {
      strictEqual(orbitdb1.peerId.constructor.name, 'Ed25519PeerIdImpl')
    })

    it('has a peerId that matches the IPFS id', async () => {
      const { id } = await ipfs1.id()
      strictEqual(orbitdb1.peerId, id)
    })

    it('has an open function', async () => {
      notStrictEqual(orbitdb1.open, undefined)
      strictEqual(typeof orbitdb1.open, 'function')
    })

    it('has a stop function', async () => {
      notStrictEqual(orbitdb1.stop, undefined)
      strictEqual(typeof orbitdb1.stop, 'function')
    })
  })

  describe('OrbitDB instance creation - errors', () => {
    after(async () => {
      if (orbitdb1) {
        await orbitdb1.stop()
      }
    })

    it('throws an error if given an empty parameters object', async () => {
      let err
      try {
        orbitdb1 = await OrbitDB({})
      } catch (e) {
        err = e
      }
      notStrictEqual(err, undefined)
      strictEqual(err.message, 'IPFS instance is a required argument.')
    })

    it('throws an error if IPFS instance is not given', async () => {
      let err
      try {
        orbitdb1 = await OrbitDB()
      } catch (e) {
        err = e
      }
      notStrictEqual(err, undefined)
      strictEqual(err.message, 'IPFS instance is a required argument.')
    })

    it('doesn\'t create the data directory when an error occurs', async () => {
      // A bit hacky but 🤷‍♂️
      if (isBrowser) {
        return
      }

      try {
        orbitdb1 = await OrbitDB()
      } catch (e) {
      }
      const dataDirectoryExists = fs.existsSync(path.join('./orbitdb'))
      const keysDirectoryExists = fs.existsSync(path.join('./orbitdb/keystore'))
      strictEqual(dataDirectoryExists, false)
      strictEqual(keysDirectoryExists, false)
    })
  })
})