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

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

import {
	mailerliteApiRequest,
	mailerliteApiRequestAllItems,
} from './GenericFunctions';

import {
	subscriberFields,
	subscriberOperations,
} from './SubscriberDescription';

export class MailerLite implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'MailerLite',
		name: 'mailerLite',
		icon: 'file:mailerLite.png',
		group: ['input'],
		version: 1,
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		description: 'Consume Mailer Lite API.',
		defaults: {
			name: 'MailerLite',
			color: '#58be72',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'mailerLiteApi',
				required: true,
			},
		],
		properties: [
			{
				displayName: 'Resource',
				name: 'resource',
				type: 'options',
				options: [
					{
						name: 'Subscriber',
						value: 'subscriber',
					},
				],
				default: 'subscriber',
				description: 'The resource to operate on.',
			},
			...subscriberOperations,
			...subscriberFields,
		],
	};

	methods = {
		loadOptions: {
			// Get all the available custom fields to display them to user so that he can
			// select them easily
			async getCustomFields(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [];
				const fields = await mailerliteApiRequest.call(this, 'GET', '/fields');
				for (const field of fields) {
					returnData.push({
						name: field.key,
						value: field.key,
					});
				}
				return returnData;
			},
		},
	};

	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
		const items = this.getInputData();
		const returnData: IDataObject[] = [];
		const length = (items.length as unknown) as number;
		const qs: IDataObject = {};
		let responseData;
		const resource = this.getNodeParameter('resource', 0) as string;
		const operation = this.getNodeParameter('operation', 0) as string;
		for (let i = 0; i < length; i++) {

			if (resource === 'subscriber') {
				//https://developers.mailerlite.com/reference#create-a-subscriber
				if (operation === 'create') {
					const email = this.getNodeParameter('email', i) as string;

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

					const body: IDataObject = {
						email,
						fields: [],
					};

					Object.assign(body, additionalFields);

					if (additionalFields.customFieldsUi) {
						const customFieldsValues = (additionalFields.customFieldsUi as IDataObject).customFieldsValues as IDataObject[];

						if (customFieldsValues) {
							const fields = {};

							for (const customFieldValue of customFieldsValues) {
								//@ts-ignore
								fields[customFieldValue.fieldId] = customFieldValue.value;
							}

							body.fields = fields;
							delete body.customFieldsUi;
						}
					}

					responseData = await mailerliteApiRequest.call(this, 'POST', '/subscribers', body);
				}
				//https://developers.mailerlite.com/reference#single-subscriber
				if (operation === 'get') {
					const subscriberId = this.getNodeParameter('subscriberId', i) as string;

					responseData = await mailerliteApiRequest.call(this, 'GET', `/subscribers/${subscriberId}`);
				}
				//https://developers.mailerlite.com/reference#subscribers
				if (operation === 'getAll') {
					const returnAll = this.getNodeParameter('returnAll', i) as boolean;

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

					Object.assign(qs, filters);

					if (returnAll) {

						responseData = await mailerliteApiRequestAllItems.call(this, 'GET', `/subscribers`, {}, qs);
					} else {
						qs.limit = this.getNodeParameter('limit', i) as number;

						responseData = await mailerliteApiRequest.call(this, 'GET', `/subscribers`, {}, qs);
					}
				}
				//https://developers.mailerlite.com/reference#update-subscriber
				if (operation === 'update') {
					const subscriberId = this.getNodeParameter('subscriberId', i) as string;

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

					const body: IDataObject = {};

					Object.assign(body, updateFields);

					if (updateFields.customFieldsUi) {
						const customFieldsValues = (updateFields.customFieldsUi as IDataObject).customFieldsValues as IDataObject[];

						if (customFieldsValues) {
							const fields = {};

							for (const customFieldValue of customFieldsValues) {
								//@ts-ignore
								fields[customFieldValue.fieldId] = customFieldValue.value;
							}

							body.fields = fields;
							delete body.customFieldsUi;
						}
					}

					responseData = await mailerliteApiRequest.call(this, 'PUT', `/subscribers/${subscriberId}`, body);
				}
			}
		}
		if (Array.isArray(responseData)) {
			returnData.push.apply(returnData, responseData as IDataObject[]);

		} else if (responseData !== undefined) {
			returnData.push(responseData as IDataObject);
		}
		return [this.helpers.returnJsonArray(returnData)];
	}
}