/*
  Integration tests for the bchjs. Only covers calls made to
  rest.bitcoin.com.

  TODO
  - getMempoolEntry() only works on TXs in the mempool, so it needs to be part
  of an e2e test to be properly tested.
*/

import chai from 'chai'
import BCHJS from '../../src/bch-js.js'

// Inspect utility used for debugging.
import util from 'util'
const assert = chai.assert
const bchjs = new BCHJS()
util.inspect.defaultOptions = {
  showHidden: true,
  colors: true,
  depth: 3
}

describe('#blockchain', () => {
  beforeEach(async () => {
    if (process.env.IS_USING_FREE_TIER) await sleep(1500)
  })

  describe('#getBestBlockHash', () => {
    it('should GET best block hash', async () => {
      const result = await bchjs.Blockchain.getBestBlockHash()
      // console.log(`result: ${util.inspect(result)}`)

      assert.isString(result)
      assert.equal(result.length, 64, 'Specific hash length')
    })
  })

  describe('#getBlockHeader', () => {
    it('should GET block header for a single hash', async () => {
      const hash =
        '000000000000000005e14d3f9fdfb70745308706615cfa9edca4f4558332b201'

      const result = await bchjs.Blockchain.getBlockHeader(hash)

      assert.hasAllKeys(result, [
        'hash',
        'confirmations',
        'height',
        'version',
        'versionHex',
        'merkleroot',
        'time',
        'mediantime',
        'nonce',
        'bits',
        'difficulty',
        'chainwork',
        'previousblockhash',
        'nextblockhash',
        'nTx'
      ])
    })

    it('should GET block headers for an array of hashes', async () => {
      const hash = [
        '000000000000000005e14d3f9fdfb70745308706615cfa9edca4f4558332b201',
        '00000000000000000568f0a96bf4348847bc84e455cbfec389f27311037a20f3'
      ]

      const result = await bchjs.Blockchain.getBlockHeader(hash)

      assert.isArray(result)
      assert.hasAllKeys(result[0], [
        'hash',
        'confirmations',
        'height',
        'version',
        'versionHex',
        'merkleroot',
        'time',
        'mediantime',
        'nonce',
        'bits',
        'difficulty',
        'chainwork',
        'previousblockhash',
        'nextblockhash',
        'nTx'
      ])
    })

    it('should throw error on array size rate limit', async () => {
      try {
        const data = []
        for (let i = 0; i < 25; i++) {
          data.push(
            '000000000000000005e14d3f9fdfb70745308706615cfa9edca4f4558332b201'
          )
        }

        const result = await bchjs.Blockchain.getBlockHeader(data)

        console.log(`result: ${util.inspect(result)}`)
        assert.equal(true, false, 'Unexpected result!')
      } catch (err) {
        assert.instanceOf(err, Error)
        assert.include(err.message, 'Array too large')
      }
    })
  })

  describe('#getMempoolEntry', () => {
    /*
    // To run this test, the txid must be unconfirmed.
    const txid =
      "defea04c38ee00cf73ad402984714ed22dc0dd99b2ae5cb50d791d94343ba79b"

    it(`should GET single mempool entry`, async () => {
      const result = await bchjs.Blockchain.getMempoolEntry(txid)
      //console.log(`result: ${JSON.stringify(result, null, 2)}`)

      assert.hasAnyKeys(result, [
        "size",
        "fee",
        "modifiedfee",
        "time",
        "height",
        "startingpriority",
        "currentpriority",
        "descendantcount",
        "descendantsize",
        "descendantfees",
        "ancestorcount",
        "ancestorsize",
        "ancestorfees",
        "depends"
      ])
    })

    it(`should get an array of mempool entries`, async () => {
      const result = await bchjs.Blockchain.getMempoolEntry([txid, txid])
      console.log(`result: ${JSON.stringify(result, null, 2)}`)

      assert.isArray(result)
      assert.hasAnyKeys(result[0], [
        "size",
        "fee",
        "modifiedfee",
        "time",
        "height",
        "startingpriority",
        "currentpriority",
        "descendantcount",
        "descendantsize",
        "descendantfees",
        "ancestorcount",
        "ancestorsize",
        "ancestorfees",
        "depends"
      ])
    })
    */

    it('should throw an error if txid is not in mempool', async () => {
      try {
        const txid =
          '03f69502ca32e7927fd4f38c1d3f950bff650c1eea3d09a70e9df5a9d7f989f7'

        await bchjs.Blockchain.getMempoolEntry(txid)

        assert.equal(true, false, 'Unexpected result!')
      } catch (err) {
        // console.log(`err: ${util.inspect(err)}`)
        assert.instanceOf(err, Error)
        assert.include(err.message, 'Transaction not in mempool')
      }
    })
  })

  describe('#getTxOutProof', () => {
    it('should get single tx out proof', async () => {
      const txid =
        '03f69502ca32e7927fd4f38c1d3f950bff650c1eea3d09a70e9df5a9d7f989f7'

      const result = await bchjs.Blockchain.getTxOutProof(txid)
      // console.log(`result: ${JSON.stringify(result, null, 2)}`)

      assert.isString(result)
    })

    it('should get an array of tx out proofs', async () => {
      const txid = [
        '03f69502ca32e7927fd4f38c1d3f950bff650c1eea3d09a70e9df5a9d7f989f7',
        'fe28050b93faea61fa88c4c630f0e1f0a1c24d0082dd0e10d369e13212128f33'
      ]

      const result = await bchjs.Blockchain.getTxOutProof(txid)
      // console.log(`result: ${JSON.stringify(result, null, 2)}`)

      assert.isArray(result)
      assert.isString(result[0])
    })
  })

  describe('#verifyTxOutProof', () => {
    const mockTxOutProof =
      '0000002086a4a3161f9ba2174883ec0b93acceac3b2f37b36ed1f90000000000000000009cb02406d1094ecf3e0b4c0ca7c585125e721147c39daf6b48c90b512741e13a12333e5cb38705180f441d8c7100000008fee9b60f1edb57e5712839186277ed39e0a004a32be9096ee47472efde8eae62f789f9d7a9f59d0ea7093dea1e0c65ff0b953f1d8cf3d47f92e732ca0295f603c272d5f4a63509f7a887f2549d78af7444aa0ecbb4f66d9cbe13bc6a89f59e05a199df8325d490818ffefe6b6321d32d7496a68580459836c0183f89082fc1b491cc91b23ecdcaa4c347bf599a62904d61f1c15b400ebbd5c90149010c139d9c1e31b774b796977393a238080ab477e1d240d0c4f155d36f519668f49bae6bd8cd5b8e40522edf76faa09cca6188d83ff13af6967cc6a569d1a5e9aeb1fdb7f531ddd2d0cbb81879741d5f38166ac1932136264366a4065cc96a42e41f96294f02df01'

    it('should verify a single proof', async () => {
      const result = await bchjs.Blockchain.verifyTxOutProof(mockTxOutProof)
      // console.log(`result: ${JSON.stringify(result, null, 2)}`)

      assert.isArray(result)
      assert.isString(result[0])
      assert.equal(
        result[0],
        '03f69502ca32e7927fd4f38c1d3f950bff650c1eea3d09a70e9df5a9d7f989f7'
      )
    })

    it('should verify an array of proofs', async () => {
      const proofs = [mockTxOutProof, mockTxOutProof]
      const result = await bchjs.Blockchain.verifyTxOutProof(proofs)
      // console.log(`result: ${JSON.stringify(result, null, 2)}`)

      assert.isArray(result)
      assert.isString(result[0])
      assert.equal(
        result[0],
        '03f69502ca32e7927fd4f38c1d3f950bff650c1eea3d09a70e9df5a9d7f989f7'
      )
    })

    it('should throw error on array size rate limit', async () => {
      try {
        const data = []
        for (let i = 0; i < 25; i++) data.push(mockTxOutProof)

        const result = await bchjs.Blockchain.verifyTxOutProof(data)

        console.log(`result: ${util.inspect(result)}`)
        assert.equal(true, false, 'Unexpected result!')
      } catch (err) {
        assert.instanceOf(err, Error)
        assert.include(err.message, 'Array too large')
      }
    })
  })

  describe('#getTxOut', () => {
    it('should get information on an unspent tx', async () => {
      const result = await bchjs.Blockchain.getTxOut(
        '62a3ea958a463a372bc0caf2c374a7f60be9c624be63a0db8db78f05809df6d8',
        0,
        true
      )
      // console.log(`result: ${JSON.stringify(result, null, 2)}`)

      assert.hasAllKeys(result, [
        'bestblock',
        'confirmations',
        'value',
        'scriptPubKey',
        'coinbase'
      ])
    })

    it('should get information on a spent tx', async () => {
      const result = await bchjs.Blockchain.getTxOut(
        '87380e52d151856b23173d6d8a3db01b984c6b50f77ea045a5a1cf4f54497871',
        0,
        true
      )
      // console.log(`result: ${JSON.stringify(result, null, 2)}`)

      assert.equal(result, null)
    })
  })
  describe('#getBlock', () => {
    it('should get block information with default verbosity', async () => {
      const blockhash =
        '0000000000000000008e8d83cba6d45a9314bc2ef4538d4e0577c6bed8593536'
      const result = await bchjs.Blockchain.getBlock(blockhash)

      assert.hasAllKeys(result, [
        'hash',
        'confirmations',
        'size',
        'height',
        'version',
        'versionHex',
        'merkleroot',
        'tx',
        'time',
        'mediantime',
        'nonce',
        'bits',
        'difficulty',
        'chainwork',
        'nTx',
        'previousblockhash',
        'nextblockhash'
      ])
      assert.isArray(result.tx)
    })

    it('should get block information with verbosity 0', async () => {
      const blockhash =
        '0000000000000000008e8d83cba6d45a9314bc2ef4538d4e0577c6bed8593536'
      const verbosity = 0
      const result = await bchjs.Blockchain.getBlock(blockhash, verbosity)

      assert.isString(result)
    })
  })

  describe('#getBlockchainInfo', () => {
    it('should get info about the blockchain', async () => {
      const result = await bchjs.Blockchain.getBlockchainInfo()

      // console.log(`blockchain info: ${JSON.stringify(result, null, 2)}`)

      assert.property(result, 'blocks')
    })
  })
})

function sleep (ms) {
  return new Promise(resolve => setTimeout(resolve, ms))
}