/* eslint-disable no-lonely-if */
/* eslint-disable @typescript-eslint/no-explicit-any */
/* eslint-disable no-prototype-builtins */
/* eslint-disable @typescript-eslint/no-unused-vars */
/* eslint-disable @typescript-eslint/prefer-nullish-coalescing */
/* eslint-disable @typescript-eslint/naming-convention */
/* eslint-disable new-cap */
/* eslint-disable @typescript-eslint/no-unsafe-call */
/* eslint-disable @typescript-eslint/no-unsafe-assignment */
/* eslint-disable @typescript-eslint/no-unsafe-return */
/* eslint-disable @typescript-eslint/no-unsafe-member-access */
/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
/* eslint-disable @typescript-eslint/no-non-null-assertion */
/* eslint-disable @typescript-eslint/no-shadow */
/* eslint-disable no-param-reassign */
import {
	GenericValue,
	IAllExecuteFunctions,
	IBinaryData,
	IContextObject,
	ICredentialDataDecryptedObject,
	ICredentialsExpressionResolveValues,
	IDataObject,
	IExecuteFunctions,
	IExecuteSingleFunctions,
	IExecuteWorkflowInfo,
	IHttpRequestOptions,
	IN8nHttpFullResponse,
	IN8nHttpResponse,
	INode,
	INodeExecutionData,
	INodeParameters,
	INodeType,
	IOAuth2Options,
	IPollFunctions,
	IRunExecutionData,
	ITaskDataConnections,
	ITriggerFunctions,
	IWebhookData,
	IWebhookDescription,
	IWebhookFunctions,
	IWorkflowDataProxyAdditionalKeys,
	IWorkflowDataProxyData,
	IWorkflowExecuteAdditionalData,
	IWorkflowMetadata,
	NodeHelpers,
	NodeOperationError,
	NodeParameterValue,
	Workflow,
	WorkflowActivateMode,
	WorkflowDataProxy,
	WorkflowExecuteMode,
	LoggerProxy as Logger,
} from 'n8n-workflow';

import { Agent } from 'https';
import { stringify } from 'qs';
import * as clientOAuth1 from 'oauth-1.0a';
import { Token } from 'oauth-1.0a';
import * as clientOAuth2 from 'client-oauth2';
// eslint-disable-next-line import/no-extraneous-dependencies
import { get } from 'lodash';
// eslint-disable-next-line import/no-extraneous-dependencies
import * as express from 'express';
import * as FormData from 'form-data';
import * as path from 'path';
import { OptionsWithUri, OptionsWithUrl } from 'request';
import * as requestPromise from 'request-promise-native';
import { createHmac } from 'crypto';
import { fromBuffer } from 'file-type';
import { lookup } from 'mime-types';

import axios, { AxiosProxyConfig, AxiosRequestConfig, Method } from 'axios';
import { URLSearchParams } from 'url';
// eslint-disable-next-line import/no-cycle
import {
	BINARY_ENCODING,
	ICredentialTestFunctions,
	IHookFunctions,
	ILoadOptionsFunctions,
	IResponseError,
	IWorkflowSettings,
	PLACEHOLDER_EMPTY_EXECUTION_ID,
} from '.';

axios.defaults.timeout = 300000;
// Prevent axios from adding x-form-www-urlencoded headers by default
axios.defaults.headers.post = {};

const requestPromiseWithDefaults = requestPromise.defaults({
	timeout: 300000, // 5 minutes
});

async function parseRequestObject(requestObject: IDataObject) {
	// This function is a temporary implementation
	// That translates all http requests done via
	// the request library to axios directly
	// We are not using n8n's interface as it would
	// an unnecessary step, considering the `request`
	// helper can be deprecated and removed.
	const axiosConfig: AxiosRequestConfig = {};

	if (requestObject.headers !== undefined) {
		axiosConfig.headers = requestObject.headers as string;
	}

	// Let's start parsing the hardest part, which is the request body.
	// The process here is as following?
	// - Check if we have a `content-type` header. If this was set,
	//   we will follow
	// - Check if the `form` property was set. If yes, then it's x-www-form-urlencoded
	// - Check if the `formData` property exists. If yes, then it's multipart/form-data
	// - Lastly, we should have a regular `body` that is probably a JSON.

	const contentTypeHeaderKeyName =
		axiosConfig.headers &&
		Object.keys(axiosConfig.headers).find(
			(headerName) => headerName.toLowerCase() === 'content-type',
		);
	const contentType =
		contentTypeHeaderKeyName &&
		(axiosConfig.headers[contentTypeHeaderKeyName] as string | undefined);
	if (contentType === 'application/x-www-form-urlencoded' && requestObject.formData === undefined) {
		// there are nodes incorrectly created, informing the content type header
		// and also using formData. Request lib takes precedence for the formData.
		// We will do the same.
		// Merge body and form properties.
		// @ts-ignore
		axiosConfig.data =
			typeof requestObject.body === 'string'
				? requestObject.body
				: new URLSearchParams(
						Object.assign(requestObject.body || {}, requestObject.form || {}) as Record<
							string,
							string
						>,
				  );
	} else if (contentType && contentType.includes('multipart/form-data') !== false) {
		if (requestObject.formData !== undefined && requestObject.formData instanceof FormData) {
			axiosConfig.data = requestObject.formData;
		} else {
			const allData = Object.assign(requestObject.body || {}, requestObject.formData || {});

			const objectKeys = Object.keys(allData);
			if (objectKeys.length > 0) {
				// Should be a standard object. We must convert to formdata
				const form = new FormData();

				objectKeys.forEach((key) => {
					const formField = (allData as IDataObject)[key] as IDataObject;
					if (formField.hasOwnProperty('value') && formField.value instanceof Buffer) {
						let filename;
						// @ts-ignore
						if (!!formField.options && formField.options.filename !== undefined) {
							filename = (formField.options as IDataObject).filename as string;
						}
						form.append(key, formField.value, filename);
					} else {
						form.append(key, formField);
					}
				});
				axiosConfig.data = form;
			}
		}
		// replace the existing header with a new one that
		// contains the boundary property.
		// @ts-ignore
		delete axiosConfig.headers[contentTypeHeaderKeyName];
		const headers = axiosConfig.data.getHeaders();
		axiosConfig.headers = Object.assign(axiosConfig.headers || {}, headers);
	} else {
		// When using the `form` property it means the content should be x-www-form-urlencoded.
		if (requestObject.form !== undefined && requestObject.body === undefined) {
			// If we have only form
			axiosConfig.data = new URLSearchParams(requestObject.form as Record<string, string>);
			if (axiosConfig.headers !== undefined) {
				// remove possibly existing content-type headers
				const headers = Object.keys(axiosConfig.headers);
				headers.forEach((header) =>
					header.toLowerCase() === 'content-type' ? delete axiosConfig.headers[header] : null,
				);
				axiosConfig.headers['Content-Type'] = 'application/x-www-form-urlencoded';
			} else {
				axiosConfig.headers = {
					'Content-Type': 'application/x-www-form-urlencoded',
				};
			}
		} else if (requestObject.formData !== undefined) {
			// remove any "content-type" that might exist.
			if (axiosConfig.headers !== undefined) {
				const headers = Object.keys(axiosConfig.headers);
				headers.forEach((header) =>
					header.toLowerCase() === 'content-type' ? delete axiosConfig.headers[header] : null,
				);
			}

			if (requestObject.formData instanceof FormData) {
				axiosConfig.data = requestObject.formData;
			} else {
				const objectKeys = Object.keys(requestObject.formData as object);
				if (objectKeys.length > 0) {
					// Should be a standard object. We must convert to formdata
					const form = new FormData();

					objectKeys.forEach((key) => {
						const formField = (requestObject.formData as IDataObject)[key] as IDataObject;
						if (formField.hasOwnProperty('value') && formField.value instanceof Buffer) {
							let filename;
							// @ts-ignore
							if (!!formField.options && formField.options.filename !== undefined) {
								filename = (formField.options as IDataObject).filename as string;
							}
							form.append(key, formField.value, filename);
						} else {
							form.append(key, formField);
						}
					});
					axiosConfig.data = form;
				}
			}
			// Mix in headers as FormData creates the boundary.
			const headers = axiosConfig.data.getHeaders();
			axiosConfig.headers = Object.assign(axiosConfig.headers || {}, headers);
		} else if (requestObject.body !== undefined) {
			// If we have body and possibly form
			if (requestObject.form !== undefined) {
				// merge both objects when exist.
				requestObject.body = Object.assign(requestObject.body, requestObject.form);
			}
			axiosConfig.data = requestObject.body as FormData | GenericValue | GenericValue[];
		}
	}

	if (requestObject.uri !== undefined) {
		axiosConfig.url = requestObject.uri as string;
	}

	if (requestObject.url !== undefined) {
		axiosConfig.url = requestObject.url as string;
	}

	if (requestObject.method !== undefined) {
		axiosConfig.method = requestObject.method as Method;
	}

	if (requestObject.qs !== undefined && Object.keys(requestObject.qs as object).length > 0) {
		axiosConfig.params = requestObject.qs as IDataObject;
	}

	if (requestObject.useQuerystring === true) {
		axiosConfig.paramsSerializer = (params) => {
			return stringify(params, { arrayFormat: 'repeat' });
		};
	}

	if (requestObject.auth !== undefined) {
		// Check support for sendImmediately
		if ((requestObject.auth as IDataObject).bearer !== undefined) {
			axiosConfig.headers = Object.assign(axiosConfig.headers || {}, {
				// eslint-disable-next-line @typescript-eslint/restrict-template-expressions
				Authorization: `Bearer ${(requestObject.auth as IDataObject).bearer}`,
			});
		} else {
			const authObj = requestObject.auth as IDataObject;
			// Request accepts both user/username and pass/password
			axiosConfig.auth = {
				username: (authObj.user || authObj.username) as string,
				password: (authObj.password || authObj.pass) as string,
			};
		}
	}

	// Only set header if we have a body, otherwise it may fail
	if (requestObject.json === true) {
		// Add application/json headers - do not set charset as it breaks a lot of stuff
		// only add if no other accept headers was sent.
		const acceptHeaderExists =
			axiosConfig.headers === undefined
				? false
				: Object.keys(axiosConfig.headers)
						.map((headerKey) => headerKey.toLowerCase())
						.includes('accept');
		if (!acceptHeaderExists) {
			axiosConfig.headers = Object.assign(axiosConfig.headers || {}, {
				Accept: 'application/json',
			});
		}
	}
	if (requestObject.json === false) {
		// Prevent json parsing
		axiosConfig.transformResponse = (res) => res;
	}

	// Axios will follow redirects by default, so we simply tell it otherwise if needed.
	if (
		requestObject.followRedirect === false &&
		((requestObject.method as string | undefined) || 'get').toLowerCase() === 'get'
	) {
		axiosConfig.maxRedirects = 0;
	}
	if (
		requestObject.followAllRedirect === false &&
		((requestObject.method as string | undefined) || 'get').toLowerCase() !== 'get'
	) {
		axiosConfig.maxRedirects = 0;
	}

	if (requestObject.rejectUnauthorized === false) {
		axiosConfig.httpsAgent = new Agent({
			rejectUnauthorized: false,
		});
	}

	if (requestObject.timeout !== undefined) {
		axiosConfig.timeout = requestObject.timeout as number;
	}

	if (requestObject.proxy !== undefined) {
		axiosConfig.proxy = requestObject.proxy as AxiosProxyConfig;
	}

	if (requestObject.encoding === null) {
		// When downloading files, return an arrayBuffer.
		axiosConfig.responseType = 'arraybuffer';
	}

	// If we don't set an accept header
	// Axios forces "application/json, text/plan, */*"
	// Which causes some nodes like NextCloud to break
	// as the service returns XML unless requested otherwise.
	const allHeaders = axiosConfig.headers ? Object.keys(axiosConfig.headers) : [];
	if (!allHeaders.some((headerKey) => headerKey.toLowerCase() === 'accept')) {
		axiosConfig.headers = Object.assign(axiosConfig.headers || {}, { accept: '*/*' });
	}
	if (
		axiosConfig.data !== undefined &&
		!(axiosConfig.data instanceof Buffer) &&
		!allHeaders.some((headerKey) => headerKey.toLowerCase() === 'content-type')
	) {
		// Use default header for application/json
		// If we don't specify this here, axios will add
		// application/json; charset=utf-8
		// and this breaks a lot of stuff
		axiosConfig.headers = Object.assign(axiosConfig.headers || {}, {
			'content-type': 'application/json',
		});
	}

	/**
	 * Missing properties:
	 * encoding (need testing)
	 * gzip (ignored - default already works)
	 * resolveWithFullResponse (implemented elsewhere)
	 * simple (???)
	 */

	return axiosConfig;
}

async function proxyRequestToAxios(
	uriOrObject: string | IDataObject,
	options?: IDataObject,
): Promise<any> {
	// tslint:disable-line:no-any

	// Check if there's a better way of getting this config here
	if (process.env.N8N_USE_DEPRECATED_REQUEST_LIB) {
		// @ts-ignore
		return requestPromiseWithDefaults.call(null, uriOrObject, options);
	}

	let axiosConfig: AxiosRequestConfig = {};

	let configObject: IDataObject;
	if (uriOrObject !== undefined && typeof uriOrObject === 'string') {
		axiosConfig.url = uriOrObject;
	}
	if (uriOrObject !== undefined && typeof uriOrObject === 'object') {
		configObject = uriOrObject;
	} else {
		configObject = options || {};
	}

	axiosConfig = Object.assign(axiosConfig, await parseRequestObject(configObject));

	return new Promise((resolve, reject) => {
		axios(axiosConfig)
			.then((response) => {
				if (configObject.resolveWithFullResponse === true) {
					let body = response.data;
					if (response.data === '') {
						if (axiosConfig.responseType === 'arraybuffer') {
							body = Buffer.alloc(0);
						} else {
							body = undefined;
						}
					}
					resolve({
						body,
						headers: response.headers,
						statusCode: response.status,
						statusMessage: response.statusText,
						request: response.request,
					});
				} else {
					let body = response.data;
					if (response.data === '') {
						if (axiosConfig.responseType === 'arraybuffer') {
							body = Buffer.alloc(0);
						} else {
							body = undefined;
						}
					}
					resolve(body);
				}
			})
			.catch((error) => {
				// The error-data was made available with request library via "error" but now on
				// axios via "response.data" so copy information over to keep it compatible
				error.error = error.response.data;
				error.statusCode = error.response.status;
				reject(error);
			});
	});
}

function searchForHeader(headers: IDataObject, headerName: string) {
	if (headers === undefined) {
		return undefined;
	}

	const headerNames = Object.keys(headers);
	headerName = headerName.toLowerCase();
	return headerNames.find((thisHeader) => thisHeader.toLowerCase() === headerName);
}

function convertN8nRequestToAxios(n8nRequest: IHttpRequestOptions): AxiosRequestConfig {
	// Destructure properties with the same name first.
	const { headers, method, timeout, auth, proxy, url } = n8nRequest;

	const axiosRequest = {
		headers: headers ?? {},
		method,
		timeout,
		auth,
		proxy,
		url,
	} as AxiosRequestConfig;

	axiosRequest.params = n8nRequest.qs;

	if (n8nRequest.disableFollowRedirect === true) {
		axiosRequest.maxRedirects = 0;
	}

	if (n8nRequest.encoding !== undefined) {
		axiosRequest.responseType = n8nRequest.encoding;
	}

	if (n8nRequest.skipSslCertificateValidation === true) {
		axiosRequest.httpsAgent = new Agent({
			rejectUnauthorized: false,
		});
	}

	if (n8nRequest.arrayFormat !== undefined) {
		axiosRequest.paramsSerializer = (params) => {
			return stringify(params, { arrayFormat: n8nRequest.arrayFormat });
		};
	}

	if (n8nRequest.body) {
		axiosRequest.data = n8nRequest.body;
		// Let's add some useful header standards here.
		const existingContentTypeHeaderKey = searchForHeader(axiosRequest.headers, 'content-type');
		if (existingContentTypeHeaderKey === undefined) {
			// We are only setting content type headers if the user did
			// not set it already manually. We're not overriding, even if it's wrong.
			if (axiosRequest.data instanceof FormData) {
				axiosRequest.headers = axiosRequest.headers || {};
				axiosRequest.headers['Content-Type'] = 'multipart/form-data';
			} else if (axiosRequest.data instanceof URLSearchParams) {
				axiosRequest.headers = axiosRequest.headers || {};
				axiosRequest.headers['Content-Type'] = 'application/x-www-form-urlencoded';
			}
		}
	}

	if (n8nRequest.json) {
		const key = searchForHeader(axiosRequest.headers, 'accept');
		// If key exists, then the user has set both accept
		// header and the json flag. Header should take precedence.
		if (!key) {
			axiosRequest.headers.Accept = 'application/json';
		}
	}

	const userAgentHeader = searchForHeader(axiosRequest.headers, 'user-agent');
	// If key exists, then the user has set both accept
	// header and the json flag. Header should take precedence.
	if (!userAgentHeader) {
		axiosRequest.headers['User-Agent'] = 'n8n';
	}

	return axiosRequest;
}

async function httpRequest(
	requestParams: IHttpRequestOptions,
): Promise<IN8nHttpFullResponse | IN8nHttpResponse> {
	// tslint:disable-line:no-any
	const axiosRequest = convertN8nRequestToAxios(requestParams);
	const result = await axios(axiosRequest);
	if (requestParams.returnFullResponse) {
		return {
			body: result.data,
			headers: result.headers,
			statusCode: result.status,
			statusMessage: result.statusText,
		};
	}
	return result.data;
}

/**
 * Returns binary data buffer for given item index and property name.
 *
 * @export
 * @param {ITaskDataConnections} inputData
 * @param {number} itemIndex
 * @param {string} propertyName
 * @param {number} inputIndex
 * @returns {Promise<Buffer>}
 */
export async function getBinaryDataBuffer(
	inputData: ITaskDataConnections,
	itemIndex: number,
	propertyName: string,
	inputIndex: number,
): Promise<Buffer> {
	const binaryData = inputData.main![inputIndex]![itemIndex]!.binary![propertyName]!;
	return Buffer.from(binaryData.data, BINARY_ENCODING);
}

/**
 * Takes a buffer and converts it into the format n8n uses. It encodes the binary data as
 * base64 and adds metadata.
 *
 * @export
 * @param {Buffer} binaryData
 * @param {string} [filePath]
 * @param {string} [mimeType]
 * @returns {Promise<IBinaryData>}
 */
export async function prepareBinaryData(
	binaryData: Buffer,
	filePath?: string,
	mimeType?: string,
): Promise<IBinaryData> {
	if (!mimeType) {
		// If no mime type is given figure it out

		if (filePath) {
			// Use file path to guess mime type
			const mimeTypeLookup = lookup(filePath);
			if (mimeTypeLookup) {
				mimeType = mimeTypeLookup;
			}
		}

		if (!mimeType) {
			// Use buffer to guess mime type
			const fileTypeData = await fromBuffer(binaryData);
			if (fileTypeData) {
				mimeType = fileTypeData.mime;
			}
		}

		if (!mimeType) {
			// Fall back to text
			mimeType = 'text/plain';
		}
	}

	const returnData: IBinaryData = {
		mimeType,
		// TODO: Should program it in a way that it does not have to converted to base64
		//       It should only convert to and from base64 when saved in database because
		//       of for example an error or when there is a wait node.
		data: binaryData.toString(BINARY_ENCODING),
	};

	if (filePath) {
		if (filePath.includes('?')) {
			// Remove maybe present query parameters
			filePath = filePath.split('?').shift();
		}

		const filePathParts = path.parse(filePath as string);

		if (filePathParts.dir !== '') {
			returnData.directory = filePathParts.dir;
		}
		returnData.fileName = filePathParts.base;

		// Remove the dot
		const fileExtension = filePathParts.ext.slice(1);
		if (fileExtension) {
			returnData.fileExtension = fileExtension;
		}
	}

	return returnData;
}

/**
 * Makes a request using OAuth data for authentication
 *
 * @export
 * @param {IAllExecuteFunctions} this
 * @param {string} credentialsType
 * @param {(OptionsWithUri | requestPromise.RequestPromiseOptions)} requestOptions
 * @param {INode} node
 * @param {IWorkflowExecuteAdditionalData} additionalData
 *
 * @returns
 */
export async function requestOAuth2(
	this: IAllExecuteFunctions,
	credentialsType: string,
	requestOptions: OptionsWithUri | requestPromise.RequestPromiseOptions,
	node: INode,
	additionalData: IWorkflowExecuteAdditionalData,
	oAuth2Options?: IOAuth2Options,
) {
	const credentials = (await this.getCredentials(
		credentialsType,
	)) as ICredentialDataDecryptedObject;

	if (credentials === undefined) {
		throw new Error('No credentials were returned!');
	}

	if (credentials.oauthTokenData === undefined) {
		throw new Error('OAuth credentials not connected!');
	}

	const oAuthClient = new clientOAuth2({
		clientId: credentials.clientId as string,
		clientSecret: credentials.clientSecret as string,
		accessTokenUri: credentials.accessTokenUrl as string,
	});

	const oauthTokenData = credentials.oauthTokenData as clientOAuth2.Data;

	const token = oAuthClient.createToken(
		get(oauthTokenData, oAuth2Options?.property as string) || oauthTokenData.accessToken,
		oauthTokenData.refreshToken,
		oAuth2Options?.tokenType || oauthTokenData.tokenType,
		oauthTokenData,
	);
	// Signs the request by adding authorization headers or query parameters depending
	// on the token-type used.
	const newRequestOptions = token.sign(requestOptions as clientOAuth2.RequestObject);

	// If keep bearer is false remove the it from the authorization header
	if (oAuth2Options?.keepBearer === false) {
		// @ts-ignore
		newRequestOptions?.headers?.Authorization =
			// @ts-ignore
			newRequestOptions?.headers?.Authorization.split(' ')[1];
	}

	return this.helpers.request!(newRequestOptions).catch(async (error: IResponseError) => {
		const statusCodeReturned =
			oAuth2Options?.tokenExpiredStatusCode === undefined
				? 401
				: oAuth2Options?.tokenExpiredStatusCode;

		if (error.statusCode === statusCodeReturned) {
			// Token is probably not valid anymore. So try refresh it.

			const tokenRefreshOptions: IDataObject = {};

			if (oAuth2Options?.includeCredentialsOnRefreshOnBody) {
				const body: IDataObject = {
					client_id: credentials.clientId as string,
					client_secret: credentials.clientSecret as string,
				};
				tokenRefreshOptions.body = body;
				// Override authorization property so the credentails are not included in it
				tokenRefreshOptions.headers = {
					Authorization: '',
				};
			}

			Logger.debug(
				`OAuth2 token for "${credentialsType}" used by node "${node.name}" expired. Should revalidate.`,
			);

			const newToken = await token.refresh(tokenRefreshOptions);

			Logger.debug(
				`OAuth2 token for "${credentialsType}" used by node "${node.name}" has been renewed.`,
			);

			credentials.oauthTokenData = newToken.data;

			// Find the name of the credentials
			if (!node.credentials || !node.credentials[credentialsType]) {
				throw new Error(
					`The node "${node.name}" does not have credentials of type "${credentialsType}"!`,
				);
			}
			const name = node.credentials[credentialsType];

			// Save the refreshed token
			await additionalData.credentialsHelper.updateCredentials(name, credentialsType, credentials);

			Logger.debug(
				`OAuth2 token for "${credentialsType}" used by node "${node.name}" has been saved to database successfully.`,
			);

			// Make the request again with the new token
			const newRequestOptions = newToken.sign(requestOptions as clientOAuth2.RequestObject);

			return this.helpers.request!(newRequestOptions);
		}

		// Unknown error so simply throw it
		throw error;
	});
}

/* Makes a request using OAuth1 data for authentication
 *
 * @export
 * @param {IAllExecuteFunctions} this
 * @param {string} credentialsType
 * @param {(OptionsWithUrl | requestPromise.RequestPromiseOptions)} requestOptionså
 * @returns
 */
export async function requestOAuth1(
	this: IAllExecuteFunctions,
	credentialsType: string,
	requestOptions: OptionsWithUrl | OptionsWithUri | requestPromise.RequestPromiseOptions,
) {
	const credentials = (await this.getCredentials(
		credentialsType,
	)) as ICredentialDataDecryptedObject;

	if (credentials === undefined) {
		throw new Error('No credentials were returned!');
	}

	if (credentials.oauthTokenData === undefined) {
		throw new Error('OAuth credentials not connected!');
	}

	const oauth = new clientOAuth1({
		consumer: {
			key: credentials.consumerKey as string,
			secret: credentials.consumerSecret as string,
		},
		signature_method: credentials.signatureMethod as string,
		hash_function(base, key) {
			const algorithm = credentials.signatureMethod === 'HMAC-SHA1' ? 'sha1' : 'sha256';
			return createHmac(algorithm, key).update(base).digest('base64');
		},
	});

	const oauthTokenData = credentials.oauthTokenData as IDataObject;

	const token: Token = {
		key: oauthTokenData.oauth_token as string,
		secret: oauthTokenData.oauth_token_secret as string,
	};

	// @ts-ignore
	requestOptions.data = { ...requestOptions.qs, ...requestOptions.form };

	// Fixes issue that OAuth1 library only works with "url" property and not with "uri"
	// @ts-ignore
	if (requestOptions.uri && !requestOptions.url) {
		// @ts-ignore
		requestOptions.url = requestOptions.uri;
		// @ts-ignore
		delete requestOptions.uri;
	}

	// @ts-ignore
	requestOptions.headers = oauth.toHeader(oauth.authorize(requestOptions, token));

	return this.helpers.request!(requestOptions).catch(async (error: IResponseError) => {
		// Unknown error so simply throw it
		throw error;
	});
}

/**
 * Takes generic input data and brings it into the json format n8n uses.
 *
 * @export
 * @param {(IDataObject | IDataObject[])} jsonData
 * @returns {INodeExecutionData[]}
 */
export function returnJsonArray(jsonData: IDataObject | IDataObject[]): INodeExecutionData[] {
	const returnData: INodeExecutionData[] = [];

	if (!Array.isArray(jsonData)) {
		jsonData = [jsonData];
	}

	jsonData.forEach((data) => {
		returnData.push({ json: data });
	});

	return returnData;
}

/**
 * Returns the additional keys for Expressions and Function-Nodes
 *
 * @export
 * @param {IWorkflowExecuteAdditionalData} additionalData
 * @returns {(IWorkflowDataProxyAdditionalKeys)}
 */
export function getAdditionalKeys(
	additionalData: IWorkflowExecuteAdditionalData,
): IWorkflowDataProxyAdditionalKeys {
	const executionId = additionalData.executionId || PLACEHOLDER_EMPTY_EXECUTION_ID;
	return {
		$executionId: executionId,
		$resumeWebhookUrl: `${additionalData.webhookWaitingBaseUrl}/${executionId}`,
	};
}

/**
 * Returns the requested decrypted credentials if the node has access to them.
 *
 * @export
 * @param {Workflow} workflow Workflow which requests the data
 * @param {INode} node Node which request the data
 * @param {string} type The credential type to return
 * @param {IWorkflowExecuteAdditionalData} additionalData
 * @returns {(ICredentialDataDecryptedObject | undefined)}
 */
export async function getCredentials(
	workflow: Workflow,
	node: INode,
	type: string,
	additionalData: IWorkflowExecuteAdditionalData,
	mode: WorkflowExecuteMode,
	runExecutionData?: IRunExecutionData | null,
	runIndex?: number,
	connectionInputData?: INodeExecutionData[],
	itemIndex?: number,
): Promise<ICredentialDataDecryptedObject | undefined> {
	// Get the NodeType as it has the information if the credentials are required
	const nodeType = workflow.nodeTypes.getByNameAndVersion(node.type, node.typeVersion);
	if (nodeType === undefined) {
		throw new NodeOperationError(
			node,
			`Node type "${node.type}" is not known so can not get credentials!`,
		);
	}

	if (nodeType.description.credentials === undefined) {
		throw new NodeOperationError(
			node,
			`Node type "${node.type}" does not have any credentials defined!`,
		);
	}

	const nodeCredentialDescription = nodeType.description.credentials.find(
		(credentialTypeDescription) => credentialTypeDescription.name === type,
	);
	if (nodeCredentialDescription === undefined) {
		throw new NodeOperationError(
			node,
			`Node type "${node.type}" does not have any credentials of type "${type}" defined!`,
		);
	}

	if (
		!NodeHelpers.displayParameter(
			additionalData.currentNodeParameters || node.parameters,
			nodeCredentialDescription,
			node.parameters,
		)
	) {
		// Credentials should not be displayed so return undefined even if they would be defined
		return undefined;
	}

	// Check if node has any credentials defined
	if (!node.credentials || !node.credentials[type]) {
		// If none are defined check if the credentials are required or not

		if (nodeCredentialDescription.required === true) {
			// Credentials are required so error
			if (!node.credentials) {
				throw new NodeOperationError(node, 'Node does not have any credentials set!');
			}
			if (!node.credentials[type]) {
				throw new NodeOperationError(node, `Node does not have any credentials set for "${type}"!`);
			}
		} else {
			// Credentials are not required so resolve with undefined
			return undefined;
		}
	}

	let expressionResolveValues: ICredentialsExpressionResolveValues | undefined;
	if (connectionInputData && runExecutionData && runIndex !== undefined) {
		expressionResolveValues = {
			connectionInputData,
			itemIndex: itemIndex || 0,
			node,
			runExecutionData,
			runIndex,
			workflow,
		} as ICredentialsExpressionResolveValues;
	}

	let name = node.credentials[type];

	if (name.charAt(0) === '=') {
		// If the credential name is an expression resolve it
		const additionalKeys = getAdditionalKeys(additionalData);
		name = workflow.expression.getParameterValue(
			name,
			runExecutionData || null,
			runIndex || 0,
			itemIndex || 0,
			node.name,
			connectionInputData || [],
			mode,
			additionalKeys,
		) as string;
	}

	const decryptedDataObject = await additionalData.credentialsHelper.getDecrypted(
		name,
		type,
		mode,
		false,
		expressionResolveValues,
	);

	return decryptedDataObject;
}

/**
 * Returns a copy of the node
 *
 * @export
 * @param {INode} node
 * @returns {INode}
 */
export function getNode(node: INode): INode {
	return JSON.parse(JSON.stringify(node));
}

/**
 * Returns the requested resolved (all expressions replaced) node parameters.
 *
 * @export
 * @param {Workflow} workflow
 * @param {(IRunExecutionData | null)} runExecutionData
 * @param {number} runIndex
 * @param {INodeExecutionData[]} connectionInputData
 * @param {INode} node
 * @param {string} parameterName
 * @param {number} itemIndex
 * @param {*} [fallbackValue]
 * @returns {(NodeParameterValue | INodeParameters | NodeParameterValue[] | INodeParameters[] | object)}
 */
export function getNodeParameter(
	workflow: Workflow,
	runExecutionData: IRunExecutionData | null,
	runIndex: number,
	connectionInputData: INodeExecutionData[],
	node: INode,
	parameterName: string,
	itemIndex: number,
	mode: WorkflowExecuteMode,
	additionalKeys: IWorkflowDataProxyAdditionalKeys,
	fallbackValue?: any,
): NodeParameterValue | INodeParameters | NodeParameterValue[] | INodeParameters[] | object {
	const nodeType = workflow.nodeTypes.getByNameAndVersion(node.type, node.typeVersion);
	if (nodeType === undefined) {
		throw new Error(`Node type "${node.type}" is not known so can not return paramter value!`);
	}

	const value = get(node.parameters, parameterName, fallbackValue);

	if (value === undefined) {
		throw new Error(`Could not get parameter "${parameterName}"!`);
	}

	let returnData;
	try {
		returnData = workflow.expression.getParameterValue(
			value,
			runExecutionData,
			runIndex,
			itemIndex,
			node.name,
			connectionInputData,
			mode,
			additionalKeys,
		);
	} catch (e) {
		e.message += ` [Error in parameter: "${parameterName}"]`;
		throw e;
	}

	return returnData;
}

/**
 * Returns if execution should be continued even if there was an error.
 *
 * @export
 * @param {INode} node
 * @returns {boolean}
 */
export function continueOnFail(node: INode): boolean {
	return get(node, 'continueOnFail', false);
}

/**
 * Returns the webhook URL of the webhook with the given name
 *
 * @export
 * @param {string} name
 * @param {Workflow} workflow
 * @param {INode} node
 * @param {IWorkflowExecuteAdditionalData} additionalData
 * @param {boolean} [isTest]
 * @returns {(string | undefined)}
 */
export function getNodeWebhookUrl(
	name: string,
	workflow: Workflow,
	node: INode,
	additionalData: IWorkflowExecuteAdditionalData,
	mode: WorkflowExecuteMode,
	additionalKeys: IWorkflowDataProxyAdditionalKeys,
	isTest?: boolean,
): string | undefined {
	let baseUrl = additionalData.webhookBaseUrl;
	if (isTest === true) {
		baseUrl = additionalData.webhookTestBaseUrl;
	}

	// eslint-disable-next-line @typescript-eslint/no-use-before-define
	const webhookDescription = getWebhookDescription(name, workflow, node);
	if (webhookDescription === undefined) {
		return undefined;
	}

	const path = workflow.expression.getSimpleParameterValue(
		node,
		webhookDescription.path,
		mode,
		additionalKeys,
	);
	if (path === undefined) {
		return undefined;
	}

	const isFullPath: boolean = workflow.expression.getSimpleParameterValue(
		node,
		webhookDescription.isFullPath,
		mode,
		additionalKeys,
		false,
	) as boolean;
	return NodeHelpers.getNodeWebhookUrl(baseUrl, workflow.id!, node, path.toString(), isFullPath);
}

/**
 * Returns the timezone for the workflow
 *
 * @export
 * @param {Workflow} workflow
 * @param {IWorkflowExecuteAdditionalData} additionalData
 * @returns {string}
 */
export function getTimezone(
	workflow: Workflow,
	additionalData: IWorkflowExecuteAdditionalData,
): string {
	// eslint-disable-next-line @typescript-eslint/prefer-optional-chain
	if (workflow.settings !== undefined && workflow.settings.timezone !== undefined) {
		return (workflow.settings as IWorkflowSettings).timezone as string;
	}
	return additionalData.timezone;
}

/**
 * Returns the full webhook description of the webhook with the given name
 *
 * @export
 * @param {string} name
 * @param {Workflow} workflow
 * @param {INode} node
 * @returns {(IWebhookDescription | undefined)}
 */
export function getWebhookDescription(
	name: string,
	workflow: Workflow,
	node: INode,
): IWebhookDescription | undefined {
	const nodeType = workflow.nodeTypes.getByNameAndVersion(node.type, node.typeVersion) as INodeType;

	if (nodeType.description.webhooks === undefined) {
		// Node does not have any webhooks so return
		return undefined;
	}

	// eslint-disable-next-line no-restricted-syntax
	for (const webhookDescription of nodeType.description.webhooks) {
		if (webhookDescription.name === name) {
			return webhookDescription;
		}
	}

	return undefined;
}

/**
 * Returns the workflow metadata
 *
 * @export
 * @param {Workflow} workflow
 * @returns {IWorkflowMetadata}
 */
export function getWorkflowMetadata(workflow: Workflow): IWorkflowMetadata {
	return {
		id: workflow.id,
		name: workflow.name,
		active: workflow.active,
	};
}

/**
 * Returns the execute functions the poll nodes have access to.
 *
 * @export
 * @param {Workflow} workflow
 * @param {INode} node
 * @param {IWorkflowExecuteAdditionalData} additionalData
 * @param {WorkflowExecuteMode} mode
 * @returns {ITriggerFunctions}
 */
// TODO: Check if I can get rid of: additionalData, and so then maybe also at ActiveWorkflowRunner.add
export function getExecutePollFunctions(
	workflow: Workflow,
	node: INode,
	additionalData: IWorkflowExecuteAdditionalData,
	mode: WorkflowExecuteMode,
	activation: WorkflowActivateMode,
): IPollFunctions {
	return ((workflow: Workflow, node: INode) => {
		return {
			__emit: (data: INodeExecutionData[][]): void => {
				throw new Error('Overwrite NodeExecuteFunctions.getExecutePullFunctions.__emit function!');
			},
			async getCredentials(type: string): Promise<ICredentialDataDecryptedObject | undefined> {
				return getCredentials(workflow, node, type, additionalData, mode);
			},
			getMode: (): WorkflowExecuteMode => {
				return mode;
			},
			getActivationMode: (): WorkflowActivateMode => {
				return activation;
			},
			getNode: () => {
				return getNode(node);
			},
			getNodeParameter: (
				parameterName: string,
				fallbackValue?: any,
			):
				| NodeParameterValue
				| INodeParameters
				| NodeParameterValue[]
				| INodeParameters[]
				| object => {
				const runExecutionData: IRunExecutionData | null = null;
				const itemIndex = 0;
				const runIndex = 0;
				const connectionInputData: INodeExecutionData[] = [];

				return getNodeParameter(
					workflow,
					runExecutionData,
					runIndex,
					connectionInputData,
					node,
					parameterName,
					itemIndex,
					mode,
					getAdditionalKeys(additionalData),
					fallbackValue,
				);
			},
			getRestApiUrl: (): string => {
				return additionalData.restApiUrl;
			},
			getTimezone: (): string => {
				return getTimezone(workflow, additionalData);
			},
			getWorkflow: () => {
				return getWorkflowMetadata(workflow);
			},
			getWorkflowStaticData(type: string): IDataObject {
				return workflow.getStaticData(type, node);
			},
			helpers: {
				httpRequest,
				prepareBinaryData,
				request: proxyRequestToAxios,
				async requestOAuth2(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUri | requestPromise.RequestPromiseOptions,
					oAuth2Options?: IOAuth2Options,
				): Promise<any> {
					return requestOAuth2.call(
						this,
						credentialsType,
						requestOptions,
						node,
						additionalData,
						oAuth2Options,
					);
				},
				async requestOAuth1(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUrl | requestPromise.RequestPromiseOptions,
				): Promise<any> {
					return requestOAuth1.call(this, credentialsType, requestOptions);
				},
				returnJsonArray,
			},
		};
	})(workflow, node);
}

/**
 * Returns the execute functions the trigger nodes have access to.
 *
 * @export
 * @param {Workflow} workflow
 * @param {INode} node
 * @param {IWorkflowExecuteAdditionalData} additionalData
 * @param {WorkflowExecuteMode} mode
 * @returns {ITriggerFunctions}
 */
// TODO: Check if I can get rid of: additionalData, and so then maybe also at ActiveWorkflowRunner.add
export function getExecuteTriggerFunctions(
	workflow: Workflow,
	node: INode,
	additionalData: IWorkflowExecuteAdditionalData,
	mode: WorkflowExecuteMode,
	activation: WorkflowActivateMode,
): ITriggerFunctions {
	return ((workflow: Workflow, node: INode) => {
		return {
			emit: (data: INodeExecutionData[][]): void => {
				throw new Error('Overwrite NodeExecuteFunctions.getExecuteTriggerFunctions.emit function!');
			},
			async getCredentials(type: string): Promise<ICredentialDataDecryptedObject | undefined> {
				return getCredentials(workflow, node, type, additionalData, mode);
			},
			getNode: () => {
				return getNode(node);
			},
			getMode: (): WorkflowExecuteMode => {
				return mode;
			},
			getActivationMode: (): WorkflowActivateMode => {
				return activation;
			},
			getNodeParameter: (
				parameterName: string,
				fallbackValue?: any,
			):
				| NodeParameterValue
				| INodeParameters
				| NodeParameterValue[]
				| INodeParameters[]
				| object => {
				const runExecutionData: IRunExecutionData | null = null;
				const itemIndex = 0;
				const runIndex = 0;
				const connectionInputData: INodeExecutionData[] = [];

				return getNodeParameter(
					workflow,
					runExecutionData,
					runIndex,
					connectionInputData,
					node,
					parameterName,
					itemIndex,
					mode,
					getAdditionalKeys(additionalData),
					fallbackValue,
				);
			},
			getRestApiUrl: (): string => {
				return additionalData.restApiUrl;
			},
			getTimezone: (): string => {
				return getTimezone(workflow, additionalData);
			},
			getWorkflow: () => {
				return getWorkflowMetadata(workflow);
			},
			getWorkflowStaticData(type: string): IDataObject {
				return workflow.getStaticData(type, node);
			},
			helpers: {
				httpRequest,
				prepareBinaryData,

				request: proxyRequestToAxios,
				async requestOAuth2(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUri | requestPromise.RequestPromiseOptions,
					oAuth2Options?: IOAuth2Options,
				): Promise<any> {
					return requestOAuth2.call(
						this,
						credentialsType,
						requestOptions,
						node,
						additionalData,
						oAuth2Options,
					);
				},
				async requestOAuth1(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUrl | requestPromise.RequestPromiseOptions,
				): Promise<any> {
					return requestOAuth1.call(this, credentialsType, requestOptions);
				},
				returnJsonArray,
			},
		};
	})(workflow, node);
}

/**
 * Returns the execute functions regular nodes have access to.
 *
 * @export
 * @param {Workflow} workflow
 * @param {IRunExecutionData} runExecutionData
 * @param {number} runIndex
 * @param {INodeExecutionData[]} connectionInputData
 * @param {ITaskDataConnections} inputData
 * @param {INode} node
 * @param {IWorkflowExecuteAdditionalData} additionalData
 * @param {WorkflowExecuteMode} mode
 * @returns {IExecuteFunctions}
 */
export function getExecuteFunctions(
	workflow: Workflow,
	runExecutionData: IRunExecutionData,
	runIndex: number,
	connectionInputData: INodeExecutionData[],
	inputData: ITaskDataConnections,
	node: INode,
	additionalData: IWorkflowExecuteAdditionalData,
	mode: WorkflowExecuteMode,
): IExecuteFunctions {
	return ((workflow, runExecutionData, connectionInputData, inputData, node) => {
		return {
			continueOnFail: () => {
				return continueOnFail(node);
			},
			evaluateExpression: (expression: string, itemIndex: number) => {
				return workflow.expression.resolveSimpleParameterValue(
					`=${expression}`,
					{},
					runExecutionData,
					runIndex,
					itemIndex,
					node.name,
					connectionInputData,
					mode,
					getAdditionalKeys(additionalData),
				);
			},
			async executeWorkflow(
				workflowInfo: IExecuteWorkflowInfo,
				inputData?: INodeExecutionData[],
			): Promise<any> {
				return additionalData.executeWorkflow(workflowInfo, additionalData, inputData);
			},
			getContext(type: string): IContextObject {
				return NodeHelpers.getContext(runExecutionData, type, node);
			},
			async getCredentials(
				type: string,
				itemIndex?: number,
			): Promise<ICredentialDataDecryptedObject | undefined> {
				return getCredentials(
					workflow,
					node,
					type,
					additionalData,
					mode,
					runExecutionData,
					runIndex,
					connectionInputData,
					itemIndex,
				);
			},
			getExecutionId: (): string => {
				return additionalData.executionId!;
			},
			getInputData: (inputIndex = 0, inputName = 'main') => {
				if (!inputData.hasOwnProperty(inputName)) {
					// Return empty array because else it would throw error when nothing is connected to input
					return [];
				}

				// TODO: Check if nodeType has input with that index defined
				if (inputData[inputName].length < inputIndex) {
					throw new Error(`Could not get input index "${inputIndex}" of input "${inputName}"!`);
				}

				if (inputData[inputName][inputIndex] === null) {
					// return [];
					throw new Error(`Value "${inputIndex}" of input "${inputName}" did not get set!`);
				}

				return inputData[inputName][inputIndex] as INodeExecutionData[];
			},
			getNodeParameter: (
				parameterName: string,
				itemIndex: number,
				fallbackValue?: any,
			):
				| NodeParameterValue
				| INodeParameters
				| NodeParameterValue[]
				| INodeParameters[]
				| object => {
				return getNodeParameter(
					workflow,
					runExecutionData,
					runIndex,
					connectionInputData,
					node,
					parameterName,
					itemIndex,
					mode,
					getAdditionalKeys(additionalData),
					fallbackValue,
				);
			},
			getMode: (): WorkflowExecuteMode => {
				return mode;
			},
			getNode: () => {
				return getNode(node);
			},
			getRestApiUrl: (): string => {
				return additionalData.restApiUrl;
			},
			getTimezone: (): string => {
				return getTimezone(workflow, additionalData);
			},
			getWorkflow: () => {
				return getWorkflowMetadata(workflow);
			},
			getWorkflowDataProxy: (itemIndex: number): IWorkflowDataProxyData => {
				const dataProxy = new WorkflowDataProxy(
					workflow,
					runExecutionData,
					runIndex,
					itemIndex,
					node.name,
					connectionInputData,
					{},
					mode,
					getAdditionalKeys(additionalData),
				);
				return dataProxy.getDataProxy();
			},
			getWorkflowStaticData(type: string): IDataObject {
				return workflow.getStaticData(type, node);
			},
			prepareOutputData: NodeHelpers.prepareOutputData,
			async putExecutionToWait(waitTill: Date): Promise<void> {
				runExecutionData.waitTill = waitTill;
			},
			sendMessageToUI(message: any): void {
				if (mode !== 'manual') {
					return;
				}
				try {
					if (additionalData.sendMessageToUI) {
						additionalData.sendMessageToUI(node.name, message);
					}
				} catch (error) {
					// eslint-disable-next-line @typescript-eslint/restrict-template-expressions
					Logger.warn(`There was a problem sending messsage to UI: ${error.message}`);
				}
			},
			helpers: {
				httpRequest,
				prepareBinaryData,
				async getBinaryDataBuffer(
					itemIndex: number,
					propertyName: string,
					inputIndex = 0,
				): Promise<Buffer> {
					return getBinaryDataBuffer.call(this, inputData, itemIndex, propertyName, inputIndex);
				},
				request: proxyRequestToAxios,
				async requestOAuth2(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUri | requestPromise.RequestPromiseOptions,
					oAuth2Options?: IOAuth2Options,
				): Promise<any> {
					return requestOAuth2.call(
						this,
						credentialsType,
						requestOptions,
						node,
						additionalData,
						oAuth2Options,
					);
				},
				async requestOAuth1(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUrl | requestPromise.RequestPromiseOptions,
				): Promise<any> {
					return requestOAuth1.call(this, credentialsType, requestOptions);
				},
				returnJsonArray,
			},
		};
	})(workflow, runExecutionData, connectionInputData, inputData, node);
}

/**
 * Returns the execute functions regular nodes have access to when single-function is defined.
 *
 * @export
 * @param {Workflow} workflow
 * @param {IRunExecutionData} runExecutionData
 * @param {number} runIndex
 * @param {INodeExecutionData[]} connectionInputData
 * @param {ITaskDataConnections} inputData
 * @param {INode} node
 * @param {number} itemIndex
 * @param {IWorkflowExecuteAdditionalData} additionalData
 * @param {WorkflowExecuteMode} mode
 * @returns {IExecuteSingleFunctions}
 */
export function getExecuteSingleFunctions(
	workflow: Workflow,
	runExecutionData: IRunExecutionData,
	runIndex: number,
	connectionInputData: INodeExecutionData[],
	inputData: ITaskDataConnections,
	node: INode,
	itemIndex: number,
	additionalData: IWorkflowExecuteAdditionalData,
	mode: WorkflowExecuteMode,
): IExecuteSingleFunctions {
	return ((workflow, runExecutionData, connectionInputData, inputData, node, itemIndex) => {
		return {
			continueOnFail: () => {
				return continueOnFail(node);
			},
			evaluateExpression: (expression: string, evaluateItemIndex: number | undefined) => {
				evaluateItemIndex = evaluateItemIndex === undefined ? itemIndex : evaluateItemIndex;
				return workflow.expression.resolveSimpleParameterValue(
					`=${expression}`,
					{},
					runExecutionData,
					runIndex,
					evaluateItemIndex,
					node.name,
					connectionInputData,
					mode,
					getAdditionalKeys(additionalData),
				);
			},
			getContext(type: string): IContextObject {
				return NodeHelpers.getContext(runExecutionData, type, node);
			},
			async getCredentials(type: string): Promise<ICredentialDataDecryptedObject | undefined> {
				return getCredentials(
					workflow,
					node,
					type,
					additionalData,
					mode,
					runExecutionData,
					runIndex,
					connectionInputData,
					itemIndex,
				);
			},
			getInputData: (inputIndex = 0, inputName = 'main') => {
				if (!inputData.hasOwnProperty(inputName)) {
					// Return empty array because else it would throw error when nothing is connected to input
					return { json: {} };
				}

				// TODO: Check if nodeType has input with that index defined
				if (inputData[inputName].length < inputIndex) {
					throw new Error(`Could not get input index "${inputIndex}" of input "${inputName}"!`);
				}

				const allItems = inputData[inputName][inputIndex];

				if (allItems === null) {
					// return [];
					throw new Error(`Value "${inputIndex}" of input "${inputName}" did not get set!`);
				}

				if (allItems[itemIndex] === null) {
					// return [];
					throw new Error(
						`Value "${inputIndex}" of input "${inputName}" with itemIndex "${itemIndex}" did not get set!`,
					);
				}

				return allItems[itemIndex];
			},
			getMode: (): WorkflowExecuteMode => {
				return mode;
			},
			getNode: () => {
				return getNode(node);
			},
			getRestApiUrl: (): string => {
				return additionalData.restApiUrl;
			},
			getTimezone: (): string => {
				return getTimezone(workflow, additionalData);
			},
			getNodeParameter: (
				parameterName: string,
				fallbackValue?: any,
			):
				| NodeParameterValue
				| INodeParameters
				| NodeParameterValue[]
				| INodeParameters[]
				| object => {
				return getNodeParameter(
					workflow,
					runExecutionData,
					runIndex,
					connectionInputData,
					node,
					parameterName,
					itemIndex,
					mode,
					getAdditionalKeys(additionalData),
					fallbackValue,
				);
			},
			getWorkflow: () => {
				return getWorkflowMetadata(workflow);
			},
			getWorkflowDataProxy: (): IWorkflowDataProxyData => {
				const dataProxy = new WorkflowDataProxy(
					workflow,
					runExecutionData,
					runIndex,
					itemIndex,
					node.name,
					connectionInputData,
					{},
					mode,
					getAdditionalKeys(additionalData),
				);
				return dataProxy.getDataProxy();
			},
			getWorkflowStaticData(type: string): IDataObject {
				return workflow.getStaticData(type, node);
			},
			helpers: {
				httpRequest,
				prepareBinaryData,
				request: proxyRequestToAxios,
				async requestOAuth2(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUri | requestPromise.RequestPromiseOptions,
					oAuth2Options?: IOAuth2Options,
				): Promise<any> {
					return requestOAuth2.call(
						this,
						credentialsType,
						requestOptions,
						node,
						additionalData,
						oAuth2Options,
					);
				},
				async requestOAuth1(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUrl | requestPromise.RequestPromiseOptions,
				): Promise<any> {
					return requestOAuth1.call(this, credentialsType, requestOptions);
				},
			},
		};
	})(workflow, runExecutionData, connectionInputData, inputData, node, itemIndex);
}

export function getCredentialTestFunctions(): ICredentialTestFunctions {
	return {
		helpers: {
			request: requestPromiseWithDefaults,
		},
	};
}

/**
 * Returns the execute functions regular nodes have access to in load-options-function.
 *
 * @export
 * @param {Workflow} workflow
 * @param {INode} node
 * @param {IWorkflowExecuteAdditionalData} additionalData
 * @returns {ILoadOptionsFunctions}
 */
export function getLoadOptionsFunctions(
	workflow: Workflow,
	node: INode,
	path: string,
	additionalData: IWorkflowExecuteAdditionalData,
): ILoadOptionsFunctions {
	return ((workflow: Workflow, node: INode, path: string) => {
		const that = {
			async getCredentials(type: string): Promise<ICredentialDataDecryptedObject | undefined> {
				return getCredentials(workflow, node, type, additionalData, 'internal');
			},
			getCurrentNodeParameter: (
				parameterPath: string,
			):
				| NodeParameterValue
				| INodeParameters
				| NodeParameterValue[]
				| INodeParameters[]
				| object
				| undefined => {
				const nodeParameters = additionalData.currentNodeParameters;

				if (parameterPath.charAt(0) === '&') {
					parameterPath = `${path.split('.').slice(1, -1).join('.')}.${parameterPath.slice(1)}`;
				}

				return get(nodeParameters, parameterPath);
			},
			getCurrentNodeParameters: (): INodeParameters | undefined => {
				return additionalData.currentNodeParameters;
			},
			getNode: () => {
				return getNode(node);
			},
			getNodeParameter: (
				parameterName: string,
				fallbackValue?: any,
			):
				| NodeParameterValue
				| INodeParameters
				| NodeParameterValue[]
				| INodeParameters[]
				| object => {
				const runExecutionData: IRunExecutionData | null = null;
				const itemIndex = 0;
				const runIndex = 0;
				const connectionInputData: INodeExecutionData[] = [];

				return getNodeParameter(
					workflow,
					runExecutionData,
					runIndex,
					connectionInputData,
					node,
					parameterName,
					itemIndex,
					'internal' as WorkflowExecuteMode,
					getAdditionalKeys(additionalData),
					fallbackValue,
				);
			},
			getTimezone: (): string => {
				return getTimezone(workflow, additionalData);
			},
			getRestApiUrl: (): string => {
				return additionalData.restApiUrl;
			},
			helpers: {
				httpRequest,
				request: proxyRequestToAxios,
				async requestOAuth2(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUri | requestPromise.RequestPromiseOptions,
					oAuth2Options?: IOAuth2Options,
				): Promise<any> {
					return requestOAuth2.call(
						this,
						credentialsType,
						requestOptions,
						node,
						additionalData,
						oAuth2Options,
					);
				},
				async requestOAuth1(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUrl | requestPromise.RequestPromiseOptions,
				): Promise<any> {
					return requestOAuth1.call(this, credentialsType, requestOptions);
				},
			},
		};
		return that;
	})(workflow, node, path);
}

/**
 * Returns the execute functions regular nodes have access to in hook-function.
 *
 * @export
 * @param {Workflow} workflow
 * @param {INode} node
 * @param {IWorkflowExecuteAdditionalData} additionalData
 * @param {WorkflowExecuteMode} mode
 * @returns {IHookFunctions}
 */
export function getExecuteHookFunctions(
	workflow: Workflow,
	node: INode,
	additionalData: IWorkflowExecuteAdditionalData,
	mode: WorkflowExecuteMode,
	activation: WorkflowActivateMode,
	isTest?: boolean,
	webhookData?: IWebhookData,
): IHookFunctions {
	return ((workflow: Workflow, node: INode) => {
		const that = {
			async getCredentials(type: string): Promise<ICredentialDataDecryptedObject | undefined> {
				return getCredentials(workflow, node, type, additionalData, mode);
			},
			getMode: (): WorkflowExecuteMode => {
				return mode;
			},
			getActivationMode: (): WorkflowActivateMode => {
				return activation;
			},
			getNode: () => {
				return getNode(node);
			},
			getNodeParameter: (
				parameterName: string,
				fallbackValue?: any,
			):
				| NodeParameterValue
				| INodeParameters
				| NodeParameterValue[]
				| INodeParameters[]
				| object => {
				const runExecutionData: IRunExecutionData | null = null;
				const itemIndex = 0;
				const runIndex = 0;
				const connectionInputData: INodeExecutionData[] = [];

				return getNodeParameter(
					workflow,
					runExecutionData,
					runIndex,
					connectionInputData,
					node,
					parameterName,
					itemIndex,
					mode,
					getAdditionalKeys(additionalData),
					fallbackValue,
				);
			},
			getNodeWebhookUrl: (name: string): string | undefined => {
				return getNodeWebhookUrl(
					name,
					workflow,
					node,
					additionalData,
					mode,
					getAdditionalKeys(additionalData),
					isTest,
				);
			},
			getTimezone: (): string => {
				return getTimezone(workflow, additionalData);
			},
			getWebhookName(): string {
				if (webhookData === undefined) {
					throw new Error('Is only supported in webhook functions!');
				}
				return webhookData.webhookDescription.name;
			},
			getWebhookDescription(name: string): IWebhookDescription | undefined {
				return getWebhookDescription(name, workflow, node);
			},
			getWorkflow: () => {
				return getWorkflowMetadata(workflow);
			},
			getWorkflowStaticData(type: string): IDataObject {
				return workflow.getStaticData(type, node);
			},
			helpers: {
				httpRequest,
				request: proxyRequestToAxios,
				async requestOAuth2(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUri | requestPromise.RequestPromiseOptions,
					oAuth2Options?: IOAuth2Options,
				): Promise<any> {
					return requestOAuth2.call(
						this,
						credentialsType,
						requestOptions,
						node,
						additionalData,
						oAuth2Options,
					);
				},
				async requestOAuth1(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUrl | requestPromise.RequestPromiseOptions,
				): Promise<any> {
					return requestOAuth1.call(this, credentialsType, requestOptions);
				},
			},
		};
		return that;
	})(workflow, node);
}

/**
 * Returns the execute functions regular nodes have access to when webhook-function is defined.
 *
 * @export
 * @param {Workflow} workflow
 * @param {IRunExecutionData} runExecutionData
 * @param {INode} node
 * @param {IWorkflowExecuteAdditionalData} additionalData
 * @param {WorkflowExecuteMode} mode
 * @returns {IWebhookFunctions}
 */
export function getExecuteWebhookFunctions(
	workflow: Workflow,
	node: INode,
	additionalData: IWorkflowExecuteAdditionalData,
	mode: WorkflowExecuteMode,
	webhookData: IWebhookData,
): IWebhookFunctions {
	return ((workflow: Workflow, node: INode) => {
		return {
			getBodyData(): IDataObject {
				if (additionalData.httpRequest === undefined) {
					throw new Error('Request is missing!');
				}
				return additionalData.httpRequest.body;
			},
			async getCredentials(type: string): Promise<ICredentialDataDecryptedObject | undefined> {
				return getCredentials(workflow, node, type, additionalData, mode);
			},
			getHeaderData(): object {
				if (additionalData.httpRequest === undefined) {
					throw new Error('Request is missing!');
				}
				return additionalData.httpRequest.headers;
			},
			getMode: (): WorkflowExecuteMode => {
				return mode;
			},
			getNode: () => {
				return getNode(node);
			},
			getNodeParameter: (
				parameterName: string,
				fallbackValue?: any,
			):
				| NodeParameterValue
				| INodeParameters
				| NodeParameterValue[]
				| INodeParameters[]
				| object => {
				const runExecutionData: IRunExecutionData | null = null;
				const itemIndex = 0;
				const runIndex = 0;
				const connectionInputData: INodeExecutionData[] = [];

				return getNodeParameter(
					workflow,
					runExecutionData,
					runIndex,
					connectionInputData,
					node,
					parameterName,
					itemIndex,
					mode,
					getAdditionalKeys(additionalData),
					fallbackValue,
				);
			},
			getParamsData(): object {
				if (additionalData.httpRequest === undefined) {
					throw new Error('Request is missing!');
				}
				return additionalData.httpRequest.params;
			},
			getQueryData(): object {
				if (additionalData.httpRequest === undefined) {
					throw new Error('Request is missing!');
				}
				return additionalData.httpRequest.query;
			},
			getRequestObject(): express.Request {
				if (additionalData.httpRequest === undefined) {
					throw new Error('Request is missing!');
				}
				return additionalData.httpRequest;
			},
			getResponseObject(): express.Response {
				if (additionalData.httpResponse === undefined) {
					throw new Error('Response is missing!');
				}
				return additionalData.httpResponse;
			},
			getNodeWebhookUrl: (name: string): string | undefined => {
				return getNodeWebhookUrl(
					name,
					workflow,
					node,
					additionalData,
					mode,
					getAdditionalKeys(additionalData),
				);
			},
			getTimezone: (): string => {
				return getTimezone(workflow, additionalData);
			},
			getWorkflow: () => {
				return getWorkflowMetadata(workflow);
			},
			getWorkflowStaticData(type: string): IDataObject {
				return workflow.getStaticData(type, node);
			},
			getWebhookName(): string {
				return webhookData.webhookDescription.name;
			},
			prepareOutputData: NodeHelpers.prepareOutputData,
			helpers: {
				httpRequest,
				prepareBinaryData,
				request: proxyRequestToAxios,
				async requestOAuth2(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUri | requestPromise.RequestPromiseOptions,
					oAuth2Options?: IOAuth2Options,
				): Promise<any> {
					return requestOAuth2.call(
						this,
						credentialsType,
						requestOptions,
						node,
						additionalData,
						oAuth2Options,
					);
				},
				async requestOAuth1(
					this: IAllExecuteFunctions,
					credentialsType: string,
					requestOptions: OptionsWithUrl | requestPromise.RequestPromiseOptions,
				): Promise<any> {
					return requestOAuth1.call(this, credentialsType, requestOptions);
				},
				returnJsonArray,
			},
		};
	})(workflow, node);
}