import {
	OptionsWithUri,
 } from 'request';

import {
	IExecuteFunctions,
	IExecuteSingleFunctions,
	IHookFunctions,
	ILoadOptionsFunctions,
	IWebhookFunctions,
} from 'n8n-core';

import {
	IDataObject,
	IOAuth2Options,
 } from 'n8n-workflow';

export async function clickupApiRequest(this: IHookFunctions | IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions | IWebhookFunctions, method: string, resource: string, body: any = {}, qs: IDataObject = {}, uri?: string, option: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
	const options: OptionsWithUri = {
		headers: {
			'Content-Type': 'application/json',
		},
		method,
		qs,
		body,
		uri: uri ||`https://api.clickup.com/api/v2${resource}`,
		json: true
	};

	try {
		const authenticationMethod = this.getNodeParameter('authentication', 0) as string;

		if (authenticationMethod === 'accessToken') {

			const credentials = this.getCredentials('clickUpApi');

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

			options.headers!['Authorization'] = credentials.accessToken;
			return await this.helpers.request!(options);

		} else {

			const oAuth2Options: IOAuth2Options = {
				keepBearer: false,
				tokenType: 'Bearer',
			};
			// @ts-ignore
			return await this.helpers.requestOAuth2!.call(this, 'clickUpOAuth2Api', options, oAuth2Options);
		}

	} catch(error) {
		let errorMessage = error;
		if (error.err) {
			errorMessage = error.err;
		}
		throw new Error('ClickUp Error: ' + errorMessage);
	}

}

export async function clickupApiRequestAllItems(this: IHookFunctions | IExecuteFunctions| ILoadOptionsFunctions, propertyName: string ,method: string, resource: string, body: any = {}, query: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any

	const returnData: IDataObject[] = [];

	let responseData;
	query.page = 0;

	do {
		responseData = await clickupApiRequest.call(this, method, resource, body, query);
		returnData.push.apply(returnData, responseData[propertyName]);
		query.page++;
		if (query.limit && query.limit <= returnData.length) {
			return returnData;
		}
	} while (
		responseData[propertyName] &&
		responseData[propertyName].length !== 0
	);
	return returnData;
}

export function validateJSON(json: string | undefined): any { // tslint:disable-line:no-any
	let result;
	try {
		result = JSON.parse(json!);
	} catch (exception) {
		result = undefined;
	}
	return result;
}