/// # Compute-to-Data (C2D) Code Examples

/// Here are the steps:

/// 0. [Prerequisites](#0-prerequisites)
/// 1. [Initialize services](#1-initialize-services)
/// 2. [Create a new node.js project](#2-create-a-new-nodejs-project-with-typescript)
/// 3. [Install dependencies](#3-install-dependencies)
/// 4. [Import dependencies and add variables and constants](#4-import-dependencies-and-add-variables-constants-and-helper-methods)
/// 5. [Initialize accounts and deploy contracts](#-initialize-accounts-and-deploy-contracts)
/// 6. [Publish a dataset and  an algorithm](#6-publish-assets-dataset-and-algorithm)
/// 7. [Resolve published datasets and algorithms](#7-resolve-assets)
/// 8. [Send datatokens to consumer](#8-send-datatokens-to-consumer)
/// 9. [Consumer fetches compute environment](#9-get-compute-environments)
/// 10. [Consumer starts a compute job using a free C2D environment](#10-consumer-starts-a-compute-job)
/// 11. [Check compute status and get download compute results url](#11-check-compute-status-and-get-download-compute-results-url)

/// Let's go through each step.

/// ## 0. Prerequisites
/// Before we start it is important that you have all of the necessary prerequisites installed on your computer.
/// - **A Unix based operating system (Linux or Mac)**. If you are a Windows user you can try to run linux inside a virtual machine but this is outside of the scope of this article.
/// - **Git**. Instructions for installing Git can be found here: https://git-scm.com/book/en/v2/Getting-Started-Installing-Git
/// - **Node.js** can be downloaded from here: https://nodejs.org/en/download/
/// - **Docker** can be installed from here: https://docs.docker.com/get-docker/. Please note that Docker must run as a non-root user, you can set this up by following these instructions: https://docs.docker.com/engine/install/linux-postinstall/

/// ## 1. Initialize services

/// Ocean.js uses off-chain services for metadata (Aquarius) and consuming datasets (Provider).

/// We start by initializing the services. To do this, we clone the Barge repository and run it. This will run the current default versions of [Aquarius](https://github.com/oceanprotocol/aquarius), [Provider](https://github.com/oceanprotocol/provider), and [Ganache](https://github.com/trufflesuite/ganache) with [our contracts](https://github.com/oceanprotocol/contracts) deployed to it.

/// ```bash
/// git clone https://github.com/oceanprotocol/barge.git
/// cd barge/
/// ./start_ocean.sh --with-provider2 --no-dashboard --with-c2d
/// ```

/// ## 2. Create a new Node.js project with TypeScript

/// Start by creating a new Node.js project. Open a new terminal and enter the following commands:

/// ```bash
/// mkdir compute-quickstart
/// cd compute-quickstart
/// npm init
/// # Answer the questions in the command line prompt
/// touch compute.ts
/// # On linux press CTRL + D to save
/// ```

/// Next, we need to setup our TypeScript compiler options. Create a new file called `tsconfig.json` in the root of the `compute-quickstart` directory.

/// ```bash
/// touch tsconfig.json
/// # Copy the following json content into the file, On linux press CTRL + D to save
/// ```

/// ```json
/// {
///   "compilerOptions": {
///     "lib": ["es6", "es7"],
///     "module": "CommonJS",
///     "target": "ES5",
///     "esModuleInterop": true,
///     "allowSyntheticDefaultImports": true,
///     "outDir": "./dist/",
///     "declaration": true,
///     "declarationDir": "./dist/"
///   },
///   "include": [
///     "compute.ts"
///   ],
///   "exclude": [ "node_modules", "dist" ]
/// }
/// ```

/// Now you can compile your TypeScript project.
/// If you have TypeScript installed use the following command:

/// ```bash
/// tsc
/// ```

/// If you don't have TypeScript installed you can install it using the command below and then compile using the above command:

/// ```bash
/// npm install -g typescript
/// ```

/// Or if you don't want to install TypeScript use the following command to compile your file:
/// ```bash
/// npx tsc compute.ts
/// ```

/// To run your script as we go along, compile the script then you can use the following command:

/// ```bash
/// node dist/compute.js
/// ```

/// ## 3. Install dependencies

/// Install dependencies running the following command in your terminal:

/// ```bash
/// npm install @oceanprotocol/lib crypto-js ethers@5.7.2 typescript @types/node ts-node
/// ```

/// ## 4. Import dependencies and add variables, constants and helper methods

/// Now open the `compute.ts` file in your text editor.

/// ### 4.1. Dependencies

/// Start by importing all of the necessary dependencies

/// ```Typescript
import fs from 'fs'
import { homedir } from 'os'
import { assert } from 'chai'
import { SHA256 } from 'crypto-js'
import { ethers, providers, Signer } from 'ethers'
import {
  ProviderInstance,
  Aquarius,
  NftFactory,
  Datatoken,
  Nft,
  ZERO_ADDRESS,
  transfer,
  sleep,
  approveWei,
  ProviderComputeInitialize,
  ConsumeMarketFee,
  ComputeAlgorithm,
  ComputeAsset,
  Config,
  Files,
  DDO,
  NftCreateData,
  DatatokenCreateParams,
  sendTx,
  configHelperNetworks,
  ConfigHelper,
  getEventFromTx,
  amountToUnits
} from '../../src'
/// ```

/// ### 4.2. Constants and variables

///  We will need two files to publish, one as dataset and one as algorithm, so here we define the files that we intend to publish.
/// ```Typescript
const DATASET_ASSET_URL: Files = {
  datatokenAddress: '0x0',
  nftAddress: '0x0',
  files: [
    {
      type: 'url',
      url: 'https://raw.githubusercontent.com/oceanprotocol/testdatasets/main/shs_dataset_test.txt',
      method: 'GET'
    }
  ]
}

const ALGORITHM_ASSET_URL: Files = {
  datatokenAddress: '0x0',
  nftAddress: '0x0',
  files: [
    {
      type: 'url',
      url: 'https://raw.githubusercontent.com/oceanprotocol/testdatasets/main/shs_dataset_test.txt',
      method: 'GET'
    }
  ]
}
/// ```

/// Next, we define the metadata for the dataset and algorithm that will describe our data assets. This is what we call the DDOs
/// ```Typescript
const DATASET_DDO: DDO = {
  '@context': ['https://w3id.org/did/v1'],
  id: 'id:op:efba17455c127a885ec7830d687a8f6e64f5ba559f8506f8723c1f10f05c049c',
  version: '4.1.0',
  chainId: 8996,
  nftAddress: '0x0',
  metadata: {
    created: '2021-12-20T14:35:20Z',
    updated: '2021-12-20T14:35:20Z',
    type: 'dataset',
    name: 'dataset-name',
    description: 'Ocean protocol test dataset description',
    author: 'oceanprotocol-team',
    license: 'https://market.oceanprotocol.com/terms',
    additionalInformation: {
      termsAndConditions: true
    }
  },
  services: [
    {
      id: 'notAnId',
      type: 'compute',
      files: '',
      datatokenAddress: '0xa15024b732A8f2146423D14209eFd074e61964F3',
      serviceEndpoint: 'https://v4.provider.goerli.oceanprotocol.com/',
      timeout: 300,
      compute: {
        publisherTrustedAlgorithmPublishers: [],
        publisherTrustedAlgorithms: [],
        allowRawAlgorithm: true,
        allowNetworkAccess: true
      }
    }
  ]
}

const ALGORITHM_DDO: DDO = {
  '@context': ['https://w3id.org/did/v1'],
  id: 'did:op:efba17455c127a885ec7830d687a8f6e64f5ba559f8506f8723c1f10f05c049c',
  version: '4.1.0',
  chainId: 8996,
  nftAddress: '0x0',
  metadata: {
    created: '2021-12-20T14:35:20Z',
    updated: '2021-12-20T14:35:20Z',
    type: 'algorithm',
    name: 'algorithm-name',
    description: 'Ocean protocol test algorithm description',
    author: 'oceanprotocol-team',
    license: 'https://market.oceanprotocol.com/terms',
    additionalInformation: {
      termsAndConditions: true
    },
    algorithm: {
      language: 'Node.js',
      version: '1.0.0',
      container: {
        entrypoint: 'node $ALGO',
        image: 'ubuntu',
        tag: 'latest',
        checksum:
          'sha256:2d7ecc9c5e08953d586a6e50c29b91479a48f69ac1ba1f9dc0420d18a728dfc5'
      }
    }
  },
  services: [
    {
      id: 'notAnId',
      type: 'access',
      files: '',
      datatokenAddress: '0xa15024b732A8f2146423D14209eFd074e61964F3',
      serviceEndpoint: 'https://v4.provider.goerli.oceanprotocol.com',
      timeout: 300
    }
  ]
}
/// ```

/// Now we define the variables which we will need later
/// ```Typescript
let config: Config
let aquariusInstance: Aquarius
let datatoken: Datatoken
let providerUrl: string
let publisherAccount: Signer
let consumerAccount: Signer
let addresses
let computeEnvs

let datasetId: string
let algorithmId: string
let resolvedDatasetDdo: DDO
let resolvedAlgorithmDdo: DDO

let computeJobId: string
let agreementId: string
/// ```

/// ### 4.3 Helper methods

/// Now we define the helper methods which we will use later to publish the dataset and algorithm, and also order them

/// Add a `createAsset()`function.
/// ```Typescript
async function createAsset(
  name: string,
  symbol: string,
  owner: Signer,
  assetUrl: Files,
  ddo: DDO,
  providerUrl: string
) {
  const nft = new Nft(owner, (await owner.provider.getNetwork()).chainId)

  const nftFactory = new NftFactory(
    addresses.ERC721Factory,
    owner,
    await owner.getChainId()
  )

  const chain = (await owner.provider.getNetwork()).chainId

  ddo.chainId = parseInt(chain.toString(10))
  const nftParamsAsset: NftCreateData = {
    name,
    symbol,
    templateIndex: 1,
    tokenURI: 'aaa',
    transferable: true,
    owner: await owner.getAddress()
  }
  const datatokenParams: DatatokenCreateParams = {
    templateIndex: 1,
    cap: '100000',
    feeAmount: '0',
    paymentCollector: ZERO_ADDRESS,
    feeToken: ZERO_ADDRESS,
    minter: await owner.getAddress(),
    mpFeeAddress: ZERO_ADDRESS
  }

  const bundleNFT = await nftFactory.createNftWithDatatoken(
    nftParamsAsset,
    datatokenParams
  )

  const trxReceipt = await bundleNFT.wait()
  // events have been emitted
  const nftCreatedEvent = getEventFromTx(trxReceipt, 'NFTCreated')
  const tokenCreatedEvent = getEventFromTx(trxReceipt, 'TokenCreated')

  const nftAddress = nftCreatedEvent.args.newTokenAddress
  const datatokenAddressAsset = tokenCreatedEvent.args.newTokenAddress
  // create the files encrypted string
  assetUrl.datatokenAddress = datatokenAddressAsset
  assetUrl.nftAddress = nftAddress
  ddo.services[0].files = await ProviderInstance.encrypt(assetUrl, chain, providerUrl)
  ddo.services[0].datatokenAddress = datatokenAddressAsset
  ddo.services[0].serviceEndpoint = 'http://172.15.0.4:8030' // put back proviederUrl

  ddo.nftAddress = nftAddress
  ddo.id = 'did:op:' + SHA256(ethers.utils.getAddress(nftAddress) + chain.toString(10))

  const encryptedResponse = await ProviderInstance.encrypt(ddo, chain, providerUrl)
  const validateResult = await aquariusInstance.validate(ddo)
  await nft.setMetadata(
    nftAddress,
    await owner.getAddress(),
    0,
    'http://172.15.0.4:8030', // put back proviederUrl
    '',
    ethers.utils.hexlify(2),
    encryptedResponse,
    validateResult.hash
  )
  return ddo.id
}
/// ```

/// Add a `handleOrder()`function.
/// ```Typescript
async function handleOrder(
  order: ProviderComputeInitialize,
  datatokenAddress: string,
  payerAccount: Signer,
  consumerAccount: string,
  serviceIndex: number,
  consumeMarkerFee?: ConsumeMarketFee
) {
  /* We do have 3 possible situations:
     - have validOrder and no providerFees -> then order is valid, providerFees are valid, just use it in startCompute
     - have validOrder and providerFees -> then order is valid but providerFees are not valid, we need to call reuseOrder and pay only providerFees
     - no validOrder -> we need to call startOrder, to pay 1 DT & providerFees
  */
  if (order.providerFee && order.providerFee.providerFeeAmount) {
    await approveWei(
      payerAccount,
      config,
      await payerAccount.getAddress(),
      order.providerFee.providerFeeToken,
      datatokenAddress,
      order.providerFee.providerFeeAmount
    )
  }
  if (order.validOrder) {
    if (!order.providerFee) return order.validOrder
    const tx = await datatoken.reuseOrder(
      datatokenAddress,
      order.validOrder,
      order.providerFee
    )
    const reusedTx = await tx.wait()
    const orderReusedTx = getEventFromTx(reusedTx, 'OrderReused')
    return orderReusedTx.transactionHash
  }
  const tx = await datatoken.startOrder(
    datatokenAddress,
    consumerAccount,
    serviceIndex,
    order.providerFee,
    consumeMarkerFee
  )
  const orderTx = await tx.wait()
  const orderStartedTx = getEventFromTx(orderTx, 'OrderStarted')
  return orderStartedTx.transactionHash
}
/// ```

/// At the end of your compute.ts file define `async function run(){ }`. We will use this function to add and test the following chunks of code.
/// <!--
describe('Compute-to-data example tests', async () => {
  /// -->

  /// We need to load the configuration. Add the following code into your `run(){ }` function
  /// ```Typescript
  before(async () => {
    const provider = new providers.JsonRpcProvider(
      process.env.NODE_URI || configHelperNetworks[1].nodeUri
    )
    publisherAccount = (await provider.getSigner(0)) as Signer
    consumerAccount = (await provider.getSigner(1)) as Signer
    const config = new ConfigHelper().getConfig(
      parseInt(String((await publisherAccount.provider.getNetwork()).chainId))
    )
    config.providerUri = process.env.PROVIDER_URL || config.providerUri
    aquariusInstance = new Aquarius(config?.metadataCacheUri)
    providerUrl = config?.providerUri
    addresses = JSON.parse(
      // eslint-disable-next-line security/detect-non-literal-fs-filename
      fs.readFileSync(
        process.env.ADDRESS_FILE ||
          `${homedir}/.ocean/ocean-contracts/artifacts/address.json`,
        'utf8'
      )
    ).development

    /// ```
    /// As we go along it's a good idea to console log the values so that you check they are right. At the end of your `run(){ ... }` function add the following logs:
    /// ```Typescript
    console.log(`Aquarius URL: ${config.metadataCacheUri}`)
    console.log(`Provider URL: ${providerUrl}`)
    console.log(`Deployed contracts address: ${addresses}`)
    console.log(`Publisher account address: ${publisherAccount}`)
    console.log(`Consumer account address: ${consumerAccount}`)
  }) ///
  /// ```

  /// Now at the end of your compute.ts file call you `run()` function. Next, let's compile the file with the `tsc` command in the console and run `node dist/compute.js`.
  /// If everything is working you should see the logs in the console and no errors.
  /// We will use all of the following code snippets in the same way. Add the code snippet and the logs to the end of your `run(){ ... }` function as well as the logs.
  /// Then compile your file with the `tsc` command and run it with `node dist/compute.js`

  it('5.1 Mint OCEAN to publisher account', async () => {
    /// You can skip this step if you are running your script against a remote network,
    /// you need to mint oceans to mentioned accounts only if you are using barge to test your script

    /// ```Typescript
    const minAbi = [
      {
        constant: false,
        inputs: [
          { name: 'to', type: 'address' },
          { name: 'value', type: 'uint256' }
        ],
        name: 'mint',
        outputs: [{ name: '', type: 'bool' }],
        payable: false,
        stateMutability: 'nonpayable',
        type: 'function'
      }
    ]

    const tokenContract = new ethers.Contract(addresses.Ocean, minAbi, publisherAccount)
    const estGasPublisher = await tokenContract.estimateGas.mint(
      await publisherAccount.getAddress(),
      amountToUnits(null, null, '1000', 18)
    )
    await sendTx(
      estGasPublisher,
      publisherAccount,
      1,
      tokenContract.mint,
      await publisherAccount.getAddress(),
      amountToUnits(null, null, '1000', 18)
    )
  }) ///
  /// ```

  it('5.2 Send some OCEAN to consumer account', async () => {
    /// ```Typescript
    transfer(
      publisherAccount,
      config,
      addresses.Ocean,
      await consumerAccount.getAddress(),
      '100'
    )
  }) ///
  /// ```

  /// ## 6. Publish assets dataset and algorithm

  it('6.1 Publish a dataset (create NFT + Datatoken) and set dataset metadata', async () => {
    /// ```Typescript
    datasetId = await createAsset(
      'D1Min',
      'D1M',
      publisherAccount,
      DATASET_ASSET_URL,
      DATASET_DDO,
      providerUrl
    )
    /// ```
    /// Now, let's check that we successfully published a dataset (create NFT + Datatoken)
    /// ```Typescript
    console.log(`dataset id: ${datasetId}`)
  }) ///
  /// ```

  it('6.2 Publish an algorithm (create NFT + Datatoken) and set algorithm metadata', async () => {
    /// ```Typescript
    algorithmId = await createAsset(
      'D1Min',
      'D1M',
      publisherAccount,
      ALGORITHM_ASSET_URL,
      ALGORITHM_DDO,
      providerUrl
    )
    /// ```
    /// Now, let's check that we successfully published a algorithm (create NFT + Datatoken)
    /// ```Typescript
    console.log(`algorithm id: ${algorithmId}`)
  }) ///
  /// ```

  /// ## 7. Resolve assets

  it('7.1 Resolve published datasets and algorithms', async () => {
    /// ```Typescript
    resolvedDatasetDdo = await aquariusInstance.waitForAqua(datasetId)
    resolvedAlgorithmDdo = await aquariusInstance.waitForAqua(algorithmId)
    /// ```
    /// <!--
    assert(resolvedDatasetDdo, 'Cannot fetch DDO from Aquarius')
    assert(resolvedAlgorithmDdo, 'Cannot fetch DDO from Aquarius')
    /// -->
  }) ///

  /// ## 8. Send datatokens to consumer

  it('8.1 Mint dataset and algorithm datatokens to publisher', async () => {
    /// ```Typescript
    const datatoken = new Datatoken(
      publisherAccount,
      (await publisherAccount.provider.getNetwork()).chainId
    )
    await datatoken.mint(
      resolvedDatasetDdo.services[0].datatokenAddress,
      await publisherAccount.getAddress(),
      '10',
      await consumerAccount.getAddress()
    )

    await datatoken.mint(
      resolvedAlgorithmDdo.services[0].datatokenAddress,
      await publisherAccount.getAddress(),
      '10',
      await consumerAccount.getAddress()
    )
  }) ///
  /// ```

  /// ## 9. Get compute environments

  it('9.1 Fetch compute environments from provider', async () => {
    /// ```Typescript
    computeEnvs = await ProviderInstance.getComputeEnvironments(providerUrl)
    /// ```
    /// <!--
    assert(computeEnvs, 'No Compute environments found')
    /// -->
  }) ///

  /// ## 10. Consumer starts a compute job

  it('10.1 Start a compute job using a free C2D environment', async () => {
    datatoken = new Datatoken(
      consumerAccount,
      (await consumerAccount.provider.getNetwork()).chainId
    )

    /// let's check the free compute environment
    /// ```Typescript
    const computeEnv = computeEnvs[resolvedDatasetDdo.chainId].find(
      (ce) => ce.priceMin === 0
    )
    console.log('Free compute environment = ', computeEnv)
    /// ```
    /// <!--
    assert(computeEnv, 'Cannot find the free compute env')
    /// -->

    /// Let's have 5 minute of compute access
    /// ```Typescript
    const mytime = new Date()
    const computeMinutes = 5
    mytime.setMinutes(mytime.getMinutes() + computeMinutes)
    const computeValidUntil = Math.floor(mytime.getTime() / 1000)

    const assets: ComputeAsset[] = [
      {
        documentId: resolvedDatasetDdo.id,
        serviceId: resolvedDatasetDdo.services[0].id
      }
    ]
    const dtAddressArray = [resolvedDatasetDdo.services[0].datatokenAddress]
    const algo: ComputeAlgorithm = {
      documentId: resolvedAlgorithmDdo.id,
      serviceId: resolvedAlgorithmDdo.services[0].id
    }

    const providerInitializeComputeResults = await ProviderInstance.initializeCompute(
      assets,
      algo,
      computeEnv.id,
      computeValidUntil,
      providerUrl,
      await consumerAccount.getAddress()
    )
    /// ```
    /// <!--
    assert(!('error' in providerInitializeComputeResults), 'Cannot order algorithm')
    /// -->
    /// ```Typescript
    algo.transferTxId = await handleOrder(
      providerInitializeComputeResults.algorithm,
      resolvedAlgorithmDdo.services[0].datatokenAddress,
      consumerAccount,
      computeEnv.consumerAddress,
      0
    )
    for (let i = 0; i < providerInitializeComputeResults.datasets.length; i++) {
      assets[i].transferTxId = await handleOrder(
        providerInitializeComputeResults.datasets[i],
        dtAddressArray[i],
        consumerAccount,
        computeEnv.consumerAddress,
        0
      )
    }

    const computeJobs = await ProviderInstance.computeStart(
      providerUrl,
      consumerAccount,
      computeEnv.id,
      assets[0],
      algo
    )

    /// ```
    /// <!--
    assert(computeJobs, 'Cannot start compute job')
    /// -->
    /// Let's save the compute job it, we re going to use later
    /// ```Typescript
    computeJobId = computeJobs[0].jobId
    // eslint-disable-next-line prefer-destructuring
    agreementId = computeJobs[0].agreementId
  }) ///
  /// ```

  /// ## 11. Check compute status and get download compute results URL
  it('11.1 Check compute status', async () => {
    /// You can also add various delays so you see the various states of the compute job
    /// ```Typescript
    const jobStatus = await ProviderInstance.computeStatus(
      providerUrl,
      await consumerAccount.getAddress(),
      computeJobId,
      agreementId
    )
    /// ```
    /// <!--
    assert(jobStatus, 'Cannot retrieve compute status!')
    /// -->
    /// Now, let's see the current status of the previously started computer job
    /// ```Typescript
    console.log('Current status of the compute job: ', jobStatus)
  }) ///
  /// ```

  it('11.2 Get download compute results URL', async () => {
    /// ```Typescript
    await sleep(10000)
    const downloadURL = await ProviderInstance.getComputeResultUrl(
      providerUrl,
      consumerAccount,
      computeJobId,
      0
    )
    /// ```
    /// <!--
    assert(downloadURL, 'Provider getComputeResultUrl failed!')
    /// -->
    /// Let's check the compute results url for the specified index
    /// ```Typescript
    console.log(`Compute results URL: ${downloadURL}`)
  }) ///
  /// ```
}) ///

/// ## Editing this file
/// Please note that ComputeExamples.md is an autogenerated file, you should not edit it directly.
/// Updates should be done in `test/integration/ComputeExamples.test.ts` and all markdown should have three forward slashes before it
/// e.g. `/// # H1 Title`