import { strictEqual, deepStrictEqual, notStrictEqual } from 'assert'
import { rimraf } from 'rimraf'
import OrbitDB from '../../src/orbitdb.js'
import Keystore from '../../src/key-store.js'
import Identities from '../../src/identities/identities.js'
import OrbitDBAccessController from '../../src/access-controllers/orbitdb.js'
import connectPeers from '../utils/connect-nodes.js'
import createHelia from '../utils/create-helia.js'

const dbPath1 = './orbitdb/tests/orbitdb-access-controller/1'
const dbPath2 = './orbitdb/tests/orbitdb-access-controller/2'

describe('OrbitDBAccessController', function () {
  let ipfs1, ipfs2
  let orbitdb1, orbitdb2
  let identities1, identities2, testIdentity1, testIdentity2

  before(async () => {
    [ipfs1, ipfs2] = await Promise.all([createHelia(), createHelia()])
    await connectPeers(ipfs1, ipfs2)

    const keystore1 = await Keystore({ path: dbPath1 + '/keys' })
    const keystore2 = await Keystore({ path: dbPath2 + '/keys' })

    identities1 = await Identities({ ipfs: ipfs1, keystore: keystore1 })
    identities2 = await Identities({ ipfs: ipfs2, keystore: keystore2 })

    testIdentity1 = await identities1.createIdentity({ id: 'userA' })
    testIdentity2 = await identities2.createIdentity({ id: 'userB' })

    orbitdb1 = await OrbitDB({ ipfs: ipfs1, identities: identities1, id: 'userA', directory: dbPath1 })
    orbitdb2 = await OrbitDB({ ipfs: ipfs2, identities: identities2, id: 'userB', directory: dbPath2 })
  })

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

    if (orbitdb2) {
      await orbitdb2.stop()
    }

    if (ipfs1) {
      await ipfs1.stop()
    }

    if (ipfs2) {
      await ipfs2.stop()
    }

    await rimraf('./orbitdb')
    await rimraf('./ipfs1')
    await rimraf('./ipfs2')
  })

  describe('Default write access', function () {
    let accessController

    before(async () => {
      accessController = await OrbitDBAccessController()({ orbitdb: orbitdb1, identities: identities1 })
    })

    it('creates an access controller', () => {
      notStrictEqual(accessController, null)
      notStrictEqual(accessController, undefined)
    })

    it('sets the controller type', () => {
      strictEqual(accessController.type, 'orbitdb')
    })

    it('sets default capabilities', async () => {
      const expected = []
      expected.admin = new Set([testIdentity1.id])

      deepStrictEqual(await accessController.capabilities(), expected)
    })

    it('allows owner to append after creation', async () => {
      const mockEntry = {
        identity: testIdentity1.hash
        // ...
        // doesn't matter what we put here, only identity is used for the check
      }
      const canAppend = await accessController.canAppend(mockEntry)
      strictEqual(canAppend, true)
    })
  })

  describe('grant', function () {
    let accessController

    before(async () => {
      accessController = await OrbitDBAccessController()({ orbitdb: orbitdb1, identities: identities1, address: 'testdb/add' })
    })

    it('adds a capability', async () => {
      try {
        await accessController.grant('write', testIdentity1.id)
      } catch (e) {
        strictEqual(e, null)
      }

      const expected = []
      expected.admin = new Set([testIdentity1.id])
      expected.write = new Set([testIdentity1.id])
      deepStrictEqual(await accessController.capabilities(), expected)
    })

    it('adds more capabilities', async () => {
      try {
        await accessController.grant('read', 'ABCD')
        await accessController.grant('delete', 'ABCD')
      } catch (e) {
        strictEqual(e, null)
      }

      const expected = []
      expected.admin = new Set([testIdentity1.id])
      expected.write = new Set([testIdentity1.id])
      expected.read = new Set(['ABCD'])
      expected.delete = new Set(['ABCD'])

      deepStrictEqual(await accessController.capabilities(), expected)
    })

    it('emit \'update\' event when a capability was added', async () => {
      let update = false
      const onUpdate = (entry) => {
        update = true
      }

      accessController.events.on('update', onUpdate)

      await accessController.grant('read', 'AXES')

      strictEqual(update, true)
    })

    it('can append after acquiring capability', async () => {
      try {
        await accessController.grant('write', testIdentity1.id)
        await accessController.grant('write', testIdentity2.id)
      } catch (e) {
        strictEqual(e, null)
      }

      const mockEntry1 = {
        identity: testIdentity1.hash
      }

      const mockEntry2 = {
        identity: testIdentity2.hash
      }

      const canAppend1 = await accessController.canAppend(mockEntry1)

      const accessController2 = await OrbitDBAccessController()({ orbitdb: orbitdb2, identities: identities2, address: 'testdb/add' })
      const canAppend2 = await accessController2.canAppend(mockEntry2)

      strictEqual(canAppend1, true)
      strictEqual(canAppend2, true)
    })
  })

  describe('revoke', function () {
    let accessController

    before(async () => {
      accessController = await OrbitDBAccessController()({ orbitdb: orbitdb1, identities: identities1, address: 'testdb/remove' })
    })

    it('removes a capability', async () => {
      try {
        await accessController.grant('write', testIdentity1.id)
        await accessController.grant('write', 'AABB')
        await accessController.revoke('write', 'AABB')
      } catch (e) {
        strictEqual(e, null)
      }

      const expected = []
      expected.admin = new Set([testIdentity1.id])
      expected.write = new Set([testIdentity1.id])

      deepStrictEqual(await accessController.capabilities(), expected)
    })

    it('can remove the creator\'s write access', async () => {
      try {
        await accessController.revoke('write', testIdentity1.id)
      } catch (e) {
        strictEqual(e, null)
      }

      const expected = []
      expected.admin = new Set([testIdentity1.id])

      deepStrictEqual(await accessController.capabilities(), expected)
    })

    it('can\'t remove the creator\'s admin access', async () => {
      try {
        await accessController.revoke('admin', testIdentity1.id)
      } catch (e) {
        strictEqual(e, null)
      }

      const expected = []
      expected.admin = new Set([testIdentity1.id])

      deepStrictEqual(await accessController.capabilities(), expected)
    })

    it('removes more capabilities', async () => {
      try {
        await accessController.grant('read', 'ABCD')
        await accessController.grant('delete', 'ABCD')
        await accessController.grant('write', testIdentity1.id)
        await accessController.revoke('read', 'ABCDE')
        await accessController.revoke('delete', 'ABCDE')
      } catch (e) {
        strictEqual(e, null)
      }

      const expected = []
      expected.admin = new Set([testIdentity1.id])
      expected.write = new Set([testIdentity1.id])
      expected.read = new Set(['ABCD'])
      expected.delete = new Set(['ABCD'])

      deepStrictEqual(await accessController.capabilities(), expected)
    })

    it('can\'t append after revoking capability', async () => {
      try {
        await accessController.grant('write', testIdentity2.id)
        await accessController.revoke('write', testIdentity2.id)
      } catch (e) {
        strictEqual(e, null)
      }
      const mockEntry1 = {
        identity: testIdentity1.hash
      }
      const mockEntry2 = {
        identity: testIdentity2.hash
      }
      const canAppend = await accessController.canAppend(mockEntry1)
      const noAppend = await accessController.canAppend(mockEntry2)
      strictEqual(canAppend, true)
      strictEqual(noAppend, false)
    })

    it('emits \'update\' event when a capability was removed', async () => {
      await accessController.grant('admin', 'cats')
      await accessController.grant('admin', 'dogs')

      let update = false
      const onUpdate = (entry) => {
        update = true
      }

      accessController.events.on('update', onUpdate)

      await accessController.revoke('admin', 'cats')

      strictEqual(update, true)
    })
  })
})
// TODO: use two separate peers for testing the AC
// TODO: add tests for revocation correctness with a database (integration tests)