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

import {
	IDataObject,
	ILoadOptionsFunctions,
	INodeType,
	INodeTypeDescription,
} from 'n8n-workflow';

import {
	activityFields,
	activityOperations,
	campaignFields,
	campaignOperations,
	leadFields,
	leadOperations,
	teamFields,
	teamOperations,
	unsubscribeFields,
	unsubscribeOperations,
} from './descriptions';

import {
	lemlistApiRequest,
	lemlistApiRequestAllItems,
} from './GenericFunctions';

import {
	isEmpty,
	omit,
} from 'lodash';

export class Lemlist implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'Lemlist',
		name: 'lemlist',
		icon: 'file:lemlist.svg',
		group: ['transform'],
		version: 1,
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		description: 'Consume the Lemlist API',
		defaults: {
			name: 'Lemlist',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'lemlistApi',
				required: true,
			},
		],
		properties: [
			{
				displayName: 'Resource',
				name: 'resource',
				type: 'options',
				noDataExpression: true,
				options: [
					{
						name: 'Activity',
						value: 'activity',
					},
					{
						name: 'Campaign',
						value: 'campaign',
					},
					{
						name: 'Lead',
						value: 'lead',
					},
					{
						name: 'Team',
						value: 'team',
					},
					{
						name: 'Unsubscribe',
						value: 'unsubscribe',
					},
				],
				default: 'activity',
			},
			...activityOperations,
			...activityFields,
			...campaignOperations,
			...campaignFields,
			...leadOperations,
			...leadFields,
			...teamOperations,
			...teamFields,
			...unsubscribeOperations,
			...unsubscribeFields,
		],
	};

	methods = {
		loadOptions: {
			async getCampaigns(this: ILoadOptionsFunctions) {
				const campaigns = await lemlistApiRequest.call(this, 'GET', '/campaigns');
				return campaigns.map(({ _id, name }: { _id: string, name: string }) => ({
					name,
					value: _id,
				}));
			},
		},
	};

	async execute(this: IExecuteFunctions) {
		const items = this.getInputData();

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

		let responseData;
		const returnData: IDataObject[] = [];

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

			try {

				if (resource === 'activity') {

					// *********************************************************************
					//                             activity
					// *********************************************************************

					if (operation === 'getAll') {

						// ----------------------------------
						//        activity: getAll
						// ----------------------------------

						// https://developer.lemlist.com/#activities

						const returnAll = this.getNodeParameter('returnAll', 0) as boolean;

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

						if (!isEmpty(filters)) {
							Object.assign(qs, filters);
						}

						responseData = await lemlistApiRequest.call(this, 'GET', '/activities', {}, qs);

						if (returnAll === false) {
							const limit = this.getNodeParameter('limit', 0) as number;
							responseData = responseData.slice(0, limit);
						}

					}

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

					// *********************************************************************
					//                             campaign
					// *********************************************************************

					if (operation === 'getAll') {

						// ----------------------------------
						//        campaign: getAll
						// ----------------------------------

						// https://developer.lemlist.com/#list-all-campaigns

						responseData = await lemlistApiRequest.call(this, 'GET', '/campaigns');

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

						if (!returnAll) {
							const limit = this.getNodeParameter('limit', i);
							responseData = responseData.slice(0, limit);
						}
					}

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

					// *********************************************************************
					//                             lead
					// *********************************************************************

					if (operation === 'create') {

						// ----------------------------------
						//          lead: create
						// ----------------------------------

						// https://developer.lemlist.com/#add-a-lead-in-a-campaign

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

						if (additionalFields.deduplicate !== undefined) {
							qs.deduplicate = additionalFields.deduplicate;
						}

						const body = {} as IDataObject;

						const remainingAdditionalFields = omit(additionalFields, 'deduplicate');

						if (!isEmpty(remainingAdditionalFields)) {
							Object.assign(body, remainingAdditionalFields);
						}

						const campaignId = this.getNodeParameter('campaignId', i);
						const email = this.getNodeParameter('email', i);
						const endpoint = `/campaigns/${campaignId}/leads/${email}`;

						responseData = await lemlistApiRequest.call(this, 'POST', endpoint, body, qs);

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

						// ----------------------------------
						//         lead: delete
						// ----------------------------------

						// https://developer.lemlist.com/#delete-a-lead-from-a-campaign

						const campaignId = this.getNodeParameter('campaignId', i);
						const email = this.getNodeParameter('email', i);
						const endpoint = `/campaigns/${campaignId}/leads/${email}`;
						responseData = await lemlistApiRequest.call(this, 'DELETE', endpoint, {}, { action: 'remove' });

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

						// ----------------------------------
						//         lead: get
						// ----------------------------------

						// https://developer.lemlist.com/#get-a-specific-lead-by-email

						const email = this.getNodeParameter('email', i);
						responseData = await lemlistApiRequest.call(this, 'GET', `/leads/${email}`);

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

						// ----------------------------------
						//         lead: unsubscribe
						// ----------------------------------

						// https://developer.lemlist.com/#unsubscribe-a-lead-from-a-campaign

						const campaignId = this.getNodeParameter('campaignId', i);
						const email = this.getNodeParameter('email', i);
						const endpoint = `/campaigns/${campaignId}/leads/${email}`;
						responseData = await lemlistApiRequest.call(this, 'DELETE', endpoint);

					}

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

					// *********************************************************************
					//                             team
					// *********************************************************************

					if (operation === 'get') {

						// ----------------------------------
						//         team: get
						// ----------------------------------

						// https://developer.lemlist.com/#team

						responseData = await lemlistApiRequest.call(this, 'GET', '/team');

					}

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

					// *********************************************************************
					//                             unsubscribe
					// *********************************************************************

					if (operation === 'add') {

						// ----------------------------------
						//        unsubscribe: Add
						// ----------------------------------

						// https://developer.lemlist.com/#add-an-email-address-in-the-unsubscribes

						const email = this.getNodeParameter('email', i);
						responseData = await lemlistApiRequest.call(this, 'POST', `/unsubscribes/${email}`);

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

						// ----------------------------------
						//        unsubscribe: delete
						// ----------------------------------

						// https://developer.lemlist.com/#delete-an-email-address-from-the-unsubscribes

						const email = this.getNodeParameter('email', i);
						responseData = await lemlistApiRequest.call(this, 'DELETE', `/unsubscribes/${email}`);

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

						// ----------------------------------
						//        unsubscribe: getAll
						// ----------------------------------

						// https://developer.lemlist.com/#list-all-unsubscribes

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

						if (returnAll) {
							responseData = await lemlistApiRequestAllItems.call(this, 'GET', '/unsubscribes');
						} else {
							const qs = {
								limit: this.getNodeParameter('limit', i) as number,
							};
							responseData = await lemlistApiRequest.call(this, 'GET', '/unsubscribes', {}, qs);
						}
					}
				}

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

				throw error;
			}

			Array.isArray(responseData)
				? returnData.push(...responseData)
				: returnData.push(responseData);
		}

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