import assert from 'assert'
import rmrf from 'rimraf'
import OrbitDB from '../../src/OrbitDB.js'
import IdentityProvider from 'orbit-db-identity-provider'
import Keystore from 'orbit-db-keystore'
import AccessControllers from 'orbit-db-access-controllers'
import * as io from 'orbit-db-io'
// Include test utilities
import {
  config,
  startIpfs,
  stopIpfs,
  testAPIs,
  connectPeers
} from 'orbit-db-test-utils'

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

Object.keys(testAPIs).forEach(API => {
  describe(`orbit-db - OrbitDBAccessController Integration (${API})`, function () {
    this.timeout(config.timeout)

    let ipfsd1, ipfsd2, ipfs1, ipfs2, id1, id2
    let orbitdb1, orbitdb2

    before(async () => {
      rmrf.sync(dbPath1)
      rmrf.sync(dbPath2)
      ipfsd1 = await startIpfs(API, config.daemon1)
      ipfsd2 = await startIpfs(API, config.daemon2)
      ipfs1 = ipfsd1.api
      ipfs2 = ipfsd2.api

      // Connect the peers manually to speed up test times
      const isLocalhostAddress = (addr) => addr.toString().includes('127.0.0.1')
      await connectPeers(ipfs1, ipfs2, { filter: isLocalhostAddress })

      const keystore1 = new Keystore(dbPath1 + '/keys')
      const keystore2 = new Keystore(dbPath2 + '/keys')

      id1 = await IdentityProvider.createIdentity({ id: 'A', keystore: keystore1 })
      id2 = await IdentityProvider.createIdentity({ id: 'B', keystore: keystore2 })

      orbitdb1 = await OrbitDB.createInstance(ipfs1, {
        AccessControllers: AccessControllers,
        directory: dbPath1,
        identity: id1
      })

      orbitdb2 = await OrbitDB.createInstance(ipfs2, {
        AccessControllers: AccessControllers,
        directory: dbPath2,
        identity: id2
      })
    })

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

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

      if (ipfsd1) {
        await stopIpfs(ipfsd1)
      }

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

    describe('OrbitDB Integration', function () {
      let db, db2
      let dbManifest, acManifest

      before(async () => {
        db = await orbitdb1.feed('AABB', {
          identity: id1,
          accessController: {
            type: 'orbitdb',
            write: [id1.id]
          }
        })

        db2 = await orbitdb2.feed(db.address, { identity: id2 })
        await db2.load()

        dbManifest = await io.read(ipfs1, db.address.root)
        const hash = dbManifest.accessController.split('/').pop()
        acManifest = await io.read(ipfs1, hash)
      })

      it('has the correct access rights after creating the database', async () => {
        assert.deepStrictEqual(db.access.capabilities, {
          admin: new Set([id1.id]),
          write: new Set([id1.id])
        })
      })

      it('makes database use the correct access controller', async () => {
        assert.strictEqual(acManifest.params.address, db.access._db.address.toString())
      })

      it('saves database manifest file locally', async () => {
        assert.notStrictEqual(dbManifest, null)
      })

      it('saves access controller manifest file locally', async () => {
        assert.notStrictEqual(acManifest, null)
      })

      describe('database manifest', () => {
        it('has correct name', async () => {
          assert.strictEqual(dbManifest.name, 'AABB')
        })

        it('has correct type', async () => {
          assert.strictEqual(dbManifest.type, 'feed')
        })

        it('has correct address', async () => {
          assert.notStrictEqual(dbManifest.accessController, null)
          assert.strictEqual(dbManifest.accessController.indexOf('/ipfs'), 0)
        })
      })

      describe('access controller manifest', () => {
        it('has correct type', async () => {
          assert.strictEqual(acManifest.type, 'orbitdb')
        })

        it('has correct address', async () => {
          assert.strictEqual(acManifest.params.address.indexOf('/orbitdb'), 0)
          assert.strictEqual(acManifest.params.address.split('/').pop(), '_access')
        })
      })

      describe('access controls', () => {
        it('granting access enables to write to the database', async () => {
          let err
          try {
            await db2.add('hello?')
            assert.strictEqual('Should not end here', false)
          } catch (e) {
            err = e.toString()
          }

          assert.strictEqual(err, `Error: Could not append entry, key "${db2.identity.id}" is not allowed to write to the log`)

          const doChanges = () => {
            return new Promise((resolve, reject) => {
              try {
                // Wait for the second user's AC to notify it was updated
                db2.access.once('updated', async () => {
                  // Wait for the first user's db to replicate the update
                  db.events.once('replicated', () => {
                    // FIXME: timeout to get rid of the "libp2p node not started yet" errors
                    setTimeout(() => resolve(), 1000)
                  })
                  // Try adding something again
                  await db2.add('hello!')
                })
                // Give access to the second user
                db.access.grant('write', id2.id)
              } catch (e) {
                reject(e)
              }
            })
          }
          await doChanges()
          const res1 = await db.iterator().collect().map(e => e.payload.value)
          const res2 = await db2.iterator().collect().map(e => e.payload.value)
          assert.deepStrictEqual(res1, ['hello!'])
          assert.deepStrictEqual(res2, ['hello!'])
        })

        it('can\'t grant access if doesn\'t have write access', async () => {
          let err
          try {
            await db2.access.grant('write', id2.id)
          } catch (e) {
            err = e.toString()
          }
          assert.strictEqual(err, `Error: Could not append entry, key "${db2.identity.id}" is not allowed to write to the log`)
        })

        it('can\'t revoke access if doesn\'t have write access', async () => {
          let err
          try {
            await db2.access.revoke('write', id1.id)
          } catch (e) {
            err = e.toString()
          }
          assert.strictEqual(err, `Error: Could not append entry, key "${db2.identity.id}" is not allowed to write to the log`)
        })

        it('revoking access disables ability to write to the database', async () => {
          const getError = () => {
            return new Promise((resolve, reject) => {
              try {
                // Wait for the second user's AC to notify it was updated
                db2.access.once('updated', async () => {
                  let err
                  try {
                    // Try adding something again
                    await db2.add('hello?')
                  } catch (e) {
                    err = e.toString()
                  }
                  resolve(err)
                })
                // Revoke user's access
                db.access.revoke('write', id2.id)
              } catch (e) {
                reject(e)
              }
            })
          }
          const err = await getError()
          assert.strictEqual(err, `Error: Could not append entry, key "${db2.identity.id}" is not allowed to write to the log`)
        })
      })
    })
  })
  // TODO: use two separate peers for testing the AC
  // TODO: add tests for revocation correctness with a database (integration tests)
})