import {
	IExecuteFunctions,
} from 'n8n-core';

import {
	ICredentialsDecrypted,
	ICredentialTestFunctions,
	IDataObject,
	ILoadOptionsFunctions,
	INodeCredentialTestResult,
	INodeExecutionData,
	INodeType,
	INodeTypeDescription,
} from 'n8n-workflow';

import {
	formatFeed,
	formatResults,
	formatSearch,
	getId,
	populate,
	setCount,
	splunkApiRequest,
	toUnixEpoch,
} from './GenericFunctions';

import {
	firedAlertOperations,
	searchConfigurationFields,
	searchConfigurationOperations,
	searchJobFields,
	searchJobOperations,
	searchResultFields,
	searchResultOperations,
	userFields,
	userOperations,
} from './descriptions';

import {
	SplunkCredentials,
	SplunkFeedResponse,
} from './types';

import {
	OptionsWithUri,
} from 'request';

export class Splunk implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'Splunk',
		name: 'splunk',
		icon: 'file:splunk.svg',
		group: ['transform'],
		version: 1,
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		description: 'Consume the Splunk Enterprise API',
		defaults: {
			name: 'Splunk',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'splunkApi',
				required: true,
				testedBy: 'splunkApiTest',
			},
		],
		properties: [
			{
				displayName: 'Resource',
				name: 'resource',
				type: 'options',
				noDataExpression: true,
				options: [
					{
						name: 'Fired Alert',
						value: 'firedAlert',
					},
					{
						name: 'Search Configuration',
						value: 'searchConfiguration',
					},
					{
						name: 'Search Job',
						value: 'searchJob',
					},
					{
						name: 'Search Result',
						value: 'searchResult',
					},
					{
						name: 'User',
						value: 'user',
					},
				],
				default: 'searchJob',
			},
			...firedAlertOperations,
			...searchConfigurationOperations,
			...searchConfigurationFields,
			...searchJobOperations,
			...searchJobFields,
			...searchResultOperations,
			...searchResultFields,
			...userOperations,
			...userFields,
		],
	};

	methods = {
		loadOptions: {
			async getRoles(this: ILoadOptionsFunctions) {
				const endpoint = '/services/authorization/roles';
				const responseData = await splunkApiRequest.call(this, 'GET', endpoint) as SplunkFeedResponse;
				const { entry: entries } = responseData.feed;

				return Array.isArray(entries)
					? entries.map(entry => ({ name: entry.title, value: entry.title }))
					: [{ name: entries.title, value: entries.title }];
			},
		},
		credentialTest: {
			async splunkApiTest(
				this: ICredentialTestFunctions,
				credential: ICredentialsDecrypted,
			): Promise<INodeCredentialTestResult> {
				const {
					authToken,
					baseUrl,
					allowUnauthorizedCerts,
				} = credential.data as SplunkCredentials;

				const endpoint = '/services/alerts/fired_alerts';

				const options: OptionsWithUri = {
					headers: {
						'Authorization': `Bearer ${authToken}`,
						'Content-Type': 'application/x-www-form-urlencoded',
					},
					method: 'GET',
					form: {},
					qs: {},
					uri: `${baseUrl}${endpoint}`,
					json: true,
					rejectUnauthorized: !allowUnauthorizedCerts,
				};

				try {
					await this.helpers.request(options);
					return {
						status: 'OK',
						message: 'Authentication successful',
					};
				} catch (error) {
					return {
						status: 'Error',
						message: error.message,
					};
				}
			},
		},
	};

	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
		const items = this.getInputData();
		const returnData: IDataObject[] = [];

		const resource = this.getNodeParameter('resource', 0) as string;
		const operation = this.getNodeParameter('operation', 0) as string;

		let responseData;

		for (let i = 0; i < items.length; i++) {

			try {

				if (resource === 'firedAlert') {

					// **********************************************************************
					//                               firedAlert
					// **********************************************************************

					if (operation === 'getReport') {

						// ----------------------------------------
						//            firedAlert: getReport
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/latest/RESTREF/RESTsearch#alerts.2Ffired_alerts

						const endpoint = '/services/alerts/fired_alerts';
						responseData = await splunkApiRequest.call(this, 'GET', endpoint).then(formatFeed);

					}

				} else if (resource === 'searchConfiguration') {

					// **********************************************************************
					//                          searchConfiguration
					// **********************************************************************

					if (operation === 'delete') {

						// ----------------------------------------
						//       searchConfiguration: delete
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/8.2.2/RESTREF/RESTsearch#saved.2Fsearches.2F.7Bname.7D

						const partialEndpoint = '/services/saved/searches/';
						const searchConfigurationId = getId.call(
							this, i, 'searchConfigurationId', '/search/saved/searches/',
						); // id endpoint differs from operation endpoint
						const endpoint = `${partialEndpoint}/${searchConfigurationId}`;

						responseData = await splunkApiRequest.call(this, 'DELETE', endpoint);

					} else if (operation === 'get') {

						// ----------------------------------------
						//         searchConfiguration: get
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/8.2.2/RESTREF/RESTsearch#saved.2Fsearches.2F.7Bname.7D

						const partialEndpoint = '/services/saved/searches/';
						const searchConfigurationId = getId.call(
							this, i, 'searchConfigurationId', '/search/saved/searches/',
						); // id endpoint differs from operation endpoint
						const endpoint = `${partialEndpoint}/${searchConfigurationId}`;

						responseData = await splunkApiRequest.call(this, 'GET', endpoint).then(formatFeed);

					} else if (operation === 'getAll') {

						// ----------------------------------------
						//       searchConfiguration: getAll
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/8.2.2/RESTREF/RESTsearch#saved.2Fsearches

						const qs = {} as IDataObject;
						const options = this.getNodeParameter('options', i) as IDataObject;

						populate(options, qs);
						setCount.call(this, qs);

						const endpoint = '/services/saved/searches';
						responseData = await splunkApiRequest.call(this, 'GET', endpoint, {}, qs).then(formatFeed);

					}

				} else if (resource === 'searchJob') {

					// **********************************************************************
					//                               searchJob
					// **********************************************************************

					if (operation === 'create') {

						// ----------------------------------------
						//            searchJob: create
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/8.2.2/RESTREF/RESTsearch#search.2Fjobs

						const body = {
							search: this.getNodeParameter('search', i),
						} as IDataObject;

						const {
							earliest_time,
							latest_time,
							index_earliest,
							index_latest,
							...rest
						} = this.getNodeParameter('additionalFields', i) as IDataObject & {
							earliest_time?: string;
							latest_time?: string;
							index_earliest?: string,
							index_latest?: string,
						};

						populate({
							...earliest_time && { earliest_time: toUnixEpoch(earliest_time) },
							...latest_time && { latest_time: toUnixEpoch(latest_time) },
							...index_earliest && { index_earliest: toUnixEpoch(index_earliest) },
							...index_latest && { index_latest: toUnixEpoch(index_latest) },
							...rest,
						}, body);

						const endpoint = '/services/search/jobs';
						responseData = await splunkApiRequest.call(this, 'POST', endpoint, body);

						const getEndpoint = `/services/search/jobs/${responseData.response.sid}`;
						responseData = await splunkApiRequest.call(this, 'GET', getEndpoint).then(formatSearch);

					} else if (operation === 'delete') {

						// ----------------------------------------
						//            searchJob: delete
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/8.2.2/RESTREF/RESTsearch#search.2Fjobs.2F.7Bsearch_id.7D

						const partialEndpoint = '/services/search/jobs/';
						const searchJobId = getId.call(this, i, 'searchJobId', partialEndpoint);
						const endpoint = `${partialEndpoint}/${searchJobId}`;
						responseData = await splunkApiRequest.call(this, 'DELETE', endpoint);

					} else if (operation === 'get') {

						// ----------------------------------------
						//              searchJob: get
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/8.2.2/RESTREF/RESTsearch#search.2Fjobs.2F.7Bsearch_id.7D

						const partialEndpoint = '/services/search/jobs/';
						const searchJobId = getId.call(this, i, 'searchJobId', partialEndpoint);
						const endpoint = `${partialEndpoint}/${searchJobId}`;
						responseData = await splunkApiRequest.call(this, 'GET', endpoint).then(formatSearch);

					} else if (operation === 'getAll') {

						// ----------------------------------------
						//            searchJob: getAll
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/8.2.2/RESTREF/RESTsearch#search.2Fjobs

						const qs = {} as IDataObject;
						const options = this.getNodeParameter('options', i) as IDataObject;

						populate(options, qs);
						setCount.call(this, qs);

						const endpoint = '/services/search/jobs';
						responseData = await splunkApiRequest.call(this, 'GET', endpoint, {}, qs) as SplunkFeedResponse;
						responseData = formatFeed(responseData);

					}

				} else if (resource === 'searchResult') {

					// **********************************************************************
					//                              searchResult
					// **********************************************************************

					if (operation === 'getAll') {

						// ----------------------------------------
						//           searchResult: getAll
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/latest/RESTREF/RESTsearch#search.2Fjobs.2F.7Bsearch_id.7D.2Fresults

						const searchJobId = this.getNodeParameter('searchJobId', i);

						const qs = {} as IDataObject;
						const filters = this.getNodeParameter('filters', i) as IDataObject & {
							keyValueMatch?: { keyValuePair?: { key: string; value: string; } }
						};
						const options = this.getNodeParameter('options', i) as IDataObject;

						const keyValuePair = filters?.keyValueMatch?.keyValuePair;

						if (keyValuePair?.key && keyValuePair?.value) {
							qs.search = `search ${keyValuePair.key}=${keyValuePair.value}`;
						}

						populate(options, qs);
						setCount.call(this, qs);

						const endpoint = `/services/search/jobs/${searchJobId}/results`;
						responseData = await splunkApiRequest.call(this, 'GET', endpoint, {}, qs).then(formatResults);

					}

				} else if (resource === 'user') {

					// **********************************************************************
					//                                  user
					// **********************************************************************

					if (operation === 'create') {

						// ----------------------------------------
						//               user: create
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/8.2.2/RESTREF/RESTaccess#authentication.2Fusers

						const roles = this.getNodeParameter('roles', i) as string[];

						const body = {
							name: this.getNodeParameter('name', i),
							roles,
							password: this.getNodeParameter('password', i),
						} as IDataObject;

						const additionalFields = this.getNodeParameter('additionalFields', i) as IDataObject;

						populate(additionalFields, body);

						const endpoint = '/services/authentication/users';
						responseData = await splunkApiRequest.call(this, 'POST', endpoint, body) as SplunkFeedResponse;
						responseData = formatFeed(responseData);

					} else if (operation === 'delete') {

						// ----------------------------------------
						//               user: delete
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/8.2.2/RESTREF/RESTaccess#authentication.2Fusers.2F.7Bname.7D

						const partialEndpoint = '/services/authentication/users';
						const userId = getId.call(this, i, 'userId', partialEndpoint);
						const endpoint = `${partialEndpoint}/${userId}`;
						await splunkApiRequest.call(this, 'DELETE', endpoint);
						responseData = { success: true };

					} else if (operation === 'get') {

						// ----------------------------------------
						//                user: get
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/8.2.2/RESTREF/RESTaccess#authentication.2Fusers.2F.7Bname.7D

						const partialEndpoint = '/services/authentication/users/';
						const userId = getId.call(this, i, 'userId', '/services/authentication/users/');
						const endpoint = `${partialEndpoint}/${userId}`;
						responseData = await splunkApiRequest.call(this, 'GET', endpoint).then(formatFeed);

					} else if (operation === 'getAll') {

						// ----------------------------------------
						//               user: getAll
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/8.2.2/RESTREF/RESTaccess#authentication.2Fusers

						const qs = {} as IDataObject;
						setCount.call(this, qs);

						const endpoint = '/services/authentication/users';
						responseData = await splunkApiRequest.call(this, 'GET', endpoint, {}, qs).then(formatFeed);

					} else if (operation === 'update') {

						// ----------------------------------------
						//               user: update
						// ----------------------------------------

						// https://docs.splunk.com/Documentation/Splunk/8.2.2/RESTREF/RESTaccess#authentication.2Fusers.2F.7Bname.7D

						const body = {} as IDataObject;
						const { roles, ...rest } = this.getNodeParameter('updateFields', i) as IDataObject & {
							roles: string[];
						};

						populate({
							...roles && { roles },
							...rest,
						}, body);

						const partialEndpoint = '/services/authentication/users/';
						const userId = getId.call(this, i, 'userId', partialEndpoint);
						const endpoint = `${partialEndpoint}/${userId}`;
						responseData = await splunkApiRequest.call(this, 'POST', endpoint, body).then(formatFeed);

					}

				}

			} catch (error) {
				if (this.continueOnFail()) {
					returnData.push({ error: error.cause.error });
					continue;
				}

				throw error;
			}

			Array.isArray(responseData)
				? returnData.push(...responseData)
				: returnData.push(responseData as IDataObject);

		}

		return [this.helpers.returnJsonArray(returnData)];
	}
}