import { deepStrictEqual, strictEqual } from 'assert'
import { rimraf } from 'rimraf'
import { copy } from 'fs-extra'
import { KeyStore, Identities } from '../../src/index.js'
import Events from '../../src/databases/events.js'
import testKeysPath from '../fixtures/test-keys-path.js'
import createHelia from '../utils/create-helia.js'

const keysPath = './testkeys'

describe('Events Database', function () {
  let ipfs
  let keystore
  let accessController
  let identities
  let testIdentity1
  let db

  const databaseId = 'events-AAA'

  before(async () => {
    ipfs = await createHelia()

    await copy(testKeysPath, keysPath)
    keystore = await KeyStore({ path: keysPath })
    identities = await Identities({ keystore })
    testIdentity1 = await identities.createIdentity({ id: 'userA' })
  })

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

    if (keystore) {
      await keystore.close()
    }

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

  beforeEach(async () => {
    db = await Events()({ ipfs, identity: testIdentity1, address: databaseId, accessController })
  })

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

  it('creates an event store', async () => {
    strictEqual(db.address.toString(), databaseId)
    strictEqual(db.type, 'events')
  })

  it('adds an event', async () => {
    const expected = 'init'

    const hash = await db.add(expected)

    const actual = await db.get(hash)
    strictEqual(actual, expected)
  })

  it('gets an event', async () => {
    const expected = 'init'

    const hash = await db.add(expected)

    const actual = await db.get(hash)
    strictEqual(actual, expected)
  })

  it('returns all events', async () => {
    const events = [
      'init',
      true,
      'hello',
      'friend',
      '12345',
      'empty',
      'friend33'
    ]

    for (const record of events) {
      await db.add(record)
    }

    const all = await db.all()

    deepStrictEqual(all.map(e => e.value), events)
  })

  describe('Iterator Options', () => {
    let hashes = []
    const last = arr => arr[arr.length - 1]
    const first = arr => arr[0]

    beforeEach(async () => {
      hashes = await Promise.all([0, 1, 2, 3, 4].map(i => db.add('hello' + i)))
    })

    describe('amount', () => {
      it('returns one item', async () => {
        const expected = ['hello4']

        const all = []
        for await (const record of db.iterator({ amount: 1 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 1)
        deepStrictEqual(all.map(e => e.value), expected)
      })

      it('returns two items', async () => {
        const expected = ['hello3', 'hello4']

        const all = []
        for await (const record of db.iterator({ amount: 2 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 2)
        deepStrictEqual(all.map(e => e.value), expected)
      })

      it('returns three items', async () => {
        const expected = ['hello2', 'hello3', 'hello4']

        const all = []
        for await (const record of db.iterator({ amount: 3 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 3)
        deepStrictEqual(all.map(e => e.value), expected)
      })

      it('sets \'amount\' greater than items available', async () => {
        const expected = ['hello0', 'hello1', 'hello2', 'hello3', 'hello4']

        const all = []
        for await (const record of db.iterator({ amount: 100 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 5)
        deepStrictEqual(all.map(e => e.value), expected)
      })

      it('sets \'amount\' to 0', async () => {
        const expected = []

        const all = []
        for await (const record of db.iterator({ amount: 0 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 0)
        deepStrictEqual(all.map(e => e.value), expected)
      })
    })

    describe('lt', () => {
      it('returns all items less than head', async () => {
        const expected = ['hello0', 'hello1', 'hello2', 'hello3']

        const all = []
        for await (const record of db.iterator({ lt: last(hashes) })) {
          all.unshift(record)
        }

        strictEqual(all.length, 4)
        deepStrictEqual(all.map(e => e.value), expected)
      })

      it('returns one item less than head', async () => {
        const expected = ['hello3']

        const all = []
        for await (const record of db.iterator({ lt: last(hashes), amount: 1 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 1)
        deepStrictEqual(all.map(e => e.value), expected)
      })

      it('returns two items less than head', async () => {
        const expected = ['hello2', 'hello3']

        const all = []
        for await (const record of db.iterator({ lt: last(hashes), amount: 2 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 2)
        deepStrictEqual(all.map(e => e.value), expected)
      })
    })

    describe('lte', () => {
      it('returns all items less or equal to head', async () => {
        const expected = ['hello0', 'hello1', 'hello2', 'hello3', 'hello4']

        const all = []
        for await (const record of db.iterator({ lte: last(hashes) })) {
          all.unshift(record)
        }

        strictEqual(all.length, 5)
        deepStrictEqual(all.map(e => e.value), expected)
      })

      it('returns one item less than or equal to head', async () => {
        const expected = ['hello4']

        const all = []
        for await (const record of db.iterator({ lte: last(hashes), amount: 1 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 1)
        deepStrictEqual(all.map(e => e.value), expected)
      })

      it('returns two items less than or equal to head', async () => {
        const expected = ['hello3', 'hello4']

        const all = []
        for await (const record of db.iterator({ lte: last(hashes), amount: 2 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 2)
        deepStrictEqual(all.map(e => e.value), expected)
      })
    })

    describe('gt', () => {
      it('returns all items greater than root', async () => {
        const expected = ['hello1', 'hello2', 'hello3', 'hello4']

        const all = []
        for await (const record of db.iterator({ gt: first(hashes) })) {
          all.unshift(record)
        }

        strictEqual(all.length, 4)
        deepStrictEqual(all.map(e => e.value), expected)
      })

      it('returns one item greater than root', async () => {
        const expected = ['hello1']

        const all = []
        for await (const record of db.iterator({ gt: first(hashes), amount: 1 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 1)
        deepStrictEqual(all.map(e => e.value), expected)
      })

      it('returns two items greater than root', async () => {
        const expected = ['hello1', 'hello2']

        const all = []
        for await (const record of db.iterator({ gt: first(hashes), amount: 2 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 2)
        deepStrictEqual(all.map(e => e.value), expected)
      })
    })

    describe('gte', () => {
      it('returns all items greater than or equal to root', async () => {
        const expected = ['hello0', 'hello1', 'hello2', 'hello3', 'hello4']

        const all = []
        for await (const record of db.iterator({ gte: first(hashes) })) {
          all.unshift(record)
        }

        strictEqual(all.length, 5)
        deepStrictEqual(all.map(e => e.value), expected)
      })

      it('returns one item greater than or equal to root', async () => {
        const expected = ['hello0']

        const all = []
        for await (const record of db.iterator({ gte: first(hashes), amount: 1 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 1)
        deepStrictEqual(all.map(e => e.value), expected)
      })

      it('returns two items greater than or equal to root', async () => {
        const expected = ['hello0', 'hello1']

        const all = []
        for await (const record of db.iterator({ gte: first(hashes), amount: 2 })) {
          all.unshift(record)
        }

        strictEqual(all.length, 2)
        deepStrictEqual(all.map(e => e.value), expected)
      })
    })

    describe('range', async () => {
      it('returns all items greater than root and less than head', async () => {
        const expected = ['hello1', 'hello2', 'hello3']

        const all = []
        for await (const record of db.iterator({ gt: first(hashes), lt: last(hashes) })) {
          all.unshift(record)
        }

        strictEqual(all.length, 3)
        deepStrictEqual(all.map(e => e.value), expected)
      })
    })
  })
})