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

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

import {
	webflowApiRequest,
	webflowApiRequestAllItems,
} from './GenericFunctions';

import {
	itemFields,
	itemOperations,
} from './ItemDescription';

export class Webflow implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'Webflow',
		name: 'webflow',
		icon: 'file:webflow.svg',
		group: ['transform'],
		version: 1,
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		description: 'Consume the Webflow API',
		defaults: {
			name: 'Webflow',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'webflowApi',
				required: true,
				displayOptions: {
					show: {
						authentication: [
							'accessToken',
						],
					},
				},
			},
			{
				name: 'webflowOAuth2Api',
				required: true,
				displayOptions: {
					show: {
						authentication: [
							'oAuth2',
						],
					},
				},
			},
		],
		properties: [
			{
				displayName: 'Authentication',
				name: 'authentication',
				type: 'options',
				options: [
					{
						name: 'Access Token',
						value: 'accessToken',
					},
					{
						name: 'OAuth2',
						value: 'oAuth2',
					},
				],
				default: 'accessToken',
				description: 'Method of authentication.',
			},
			{
				displayName: 'Resource',
				name: 'resource',
				type: 'options',
				options: [
					{
						name: 'Item',
						value: 'item',
					},
				],
				default: 'item',
				description: 'Resource to consume',
			},
			...itemOperations,
			...itemFields,
		],
	};

	methods = {
		loadOptions: {
			async getSites(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [];
				const sites = await webflowApiRequest.call(this, 'GET', '/sites');
				for (const site of sites) {
					returnData.push({
						name: site.name,
						value: site._id,
					});
				}
				return returnData;
			},
			async getCollections(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [];
				const siteId = this.getCurrentNodeParameter('siteId');
				const collections = await webflowApiRequest.call(this, 'GET', `/sites/${siteId}/collections`);
				for (const collection of collections) {
					returnData.push({
						name: collection.name,
						value: collection._id,
					});
				}
				return returnData;
			},
			async getFields(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [];
				const collectionId = this.getCurrentNodeParameter('collectionId');
				const { fields } = await webflowApiRequest.call(this, 'GET', `/collections/${collectionId}`);
				for (const field of fields) {
					returnData.push({
						name: `${field.name} (${field.type}) ${(field.required) ? ' (required)' : ''}`,
						value: field.slug,
					});
				}
				return returnData;
			},
		},
	};

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

		const resource = this.getNodeParameter('resource', 0) as string;
		const operation = this.getNodeParameter('operation', 0) as string;
		const qs: IDataObject = {};
		let responseData;
		const returnData: IDataObject[] = [];

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

			try {
				if (resource === 'item') {

					// *********************************************************************
					//                             item
					// *********************************************************************

					// https://developers.webflow.com/#item-model

					if (operation === 'create') {

						// ----------------------------------
						//         item: create
						// ----------------------------------

						// https://developers.webflow.com/#create-new-collection-item

						const collectionId = this.getNodeParameter('collectionId', i) as string;

						const properties = this.getNodeParameter('fieldsUi.fieldValues', i, []) as IDataObject[];

						const live = this.getNodeParameter('live', i) as boolean;

						const fields = {} as IDataObject;

						properties.forEach(data => (fields[data.fieldId as string] = data.fieldValue));

						const body: IDataObject = {
							fields,
						};

						responseData = await webflowApiRequest.call(this, 'POST', `/collections/${collectionId}/items`, body, { live });

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

						// ----------------------------------
						//         item: delete
						// ----------------------------------

						// https://developers.webflow.com/#remove-collection-item

						const collectionId = this.getNodeParameter('collectionId', i) as string;
						const itemId = this.getNodeParameter('itemId', i) as string;
						responseData = await webflowApiRequest.call(this, 'DELETE', `/collections/${collectionId}/items/${itemId}`);

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

						// ----------------------------------
						//         item: get
						// ----------------------------------

						// https://developers.webflow.com/#get-single-item

						const collectionId = this.getNodeParameter('collectionId', i) as string;
						const itemId = this.getNodeParameter('itemId', i) as string;
						responseData = await webflowApiRequest.call(this, 'GET', `/collections/${collectionId}/items/${itemId}`);
						responseData = responseData.items;

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

						// ----------------------------------
						//         item: getAll
						// ----------------------------------

						// https://developers.webflow.com/#get-all-items-for-a-collection

						const returnAll = this.getNodeParameter('returnAll', 0) as boolean;
						const collectionId = this.getNodeParameter('collectionId', i) as string;
						const qs: IDataObject = {};

						if (returnAll === true) {
							responseData = await webflowApiRequestAllItems.call(this, 'GET', `/collections/${collectionId}/items`, {}, qs);
						} else {
							qs.limit = this.getNodeParameter('limit', 0) as number;
							responseData = await webflowApiRequest.call(this, 'GET', `/collections/${collectionId}/items`, {}, qs);
							responseData = responseData.items;
						}

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

						// ----------------------------------
						//         item: update
						// ----------------------------------

						// https://developers.webflow.com/#update-collection-item

						const collectionId = this.getNodeParameter('collectionId', i) as string;

						const itemId = this.getNodeParameter('itemId', i) as string;

						const properties = this.getNodeParameter('fieldsUi.fieldValues', i, []) as IDataObject[];

						const live = this.getNodeParameter('live', i) as boolean;

						const fields = {} as IDataObject;

						properties.forEach(data => (fields[data.fieldId as string] = data.fieldValue));

						const body: IDataObject = {
							fields,
						};

						responseData = await webflowApiRequest.call(this, 'PUT', `/collections/${collectionId}/items/${itemId}`, body, { live });
					}
				}

				Array.isArray(responseData)
					? returnData.push(...responseData)
					: returnData.push(responseData);
			} catch (error) {
				if (this.continueOnFail()) {
					returnData.push({ error: error.message });
					continue;
				}
				throw error;
			}
		}

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