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

import {
	ICredentialDataDecryptedObject,
	ICredentialTestFunctions,
	IDataObject,
	IExecuteSingleFunctions,
	ILoadOptionsFunctions,
	IPollFunctions,
	JsonObject,
	NodeApiError,
} from 'n8n-workflow';

import { OptionsWithUri } from 'request';

// Interfaces and Types -------------------------------------------------------------
interface IHaloPSATokens {
	scope: string;
	token_type: string;
	access_token: string;
	expires_in: number;
	refresh_token: string;
	id_token: string;
}

// API Requests ---------------------------------------------------------------------

export async function getAccessTokens(
	this: IExecuteFunctions | ILoadOptionsFunctions,
): Promise<IHaloPSATokens> {
	const credentials = await this.getCredentials('haloPSAApi');

	const options: OptionsWithUri = {
		headers: {
			'Content-Type': 'application/x-www-form-urlencoded',
		},
		method: 'POST',
		form: {
			client_id: credentials.client_id,
			client_secret: credentials.client_secret,
			grant_type: 'client_credentials',
			scope: credentials.scope,
		},
		uri: getAuthUrl(credentials),
		json: true,
	};

	try {
		const tokens = await this.helpers.request!(options);
		return tokens;
	} catch (error) {
		throw new NodeApiError(this.getNode(), error as JsonObject);
	}
}

export async function haloPSAApiRequest(
	this:
		| IHookFunctions
		| IExecuteFunctions
		| IExecuteSingleFunctions
		| ILoadOptionsFunctions
		| IPollFunctions,
	method: string,
	resource: string,
	accessToken: string,
	body: IDataObject | IDataObject[] = {},
	qs: IDataObject = {},
	option: IDataObject = {},
): Promise<any> { // tslint:disable-line:no-any
	const resourceApiUrl = (await this.getCredentials('haloPSAApi'))
		.resourceApiUrl as string;

	try {
		let options: OptionsWithUri = {
			headers: {
				Authorization: `Bearer ${accessToken}`,
				'User-Agent': 'https://n8n.io',
				Connection: 'keep-alive',
				Accept: '*/*',
				'Accept-Encoding': 'gzip, deflate, br',
				'Content-Type': 'application/json',
			},
			method,
			qs,
			body,
			uri: `${resourceApiUrl}${resource}`,
			json: true,
		};
		options = Object.assign({}, options, option);
		if (Object.keys(body).length === 0) {
			delete options.body;
		}
		const result = await this.helpers.request!(options);
		if (method === 'DELETE' && result.id) {
			return { success: true };
		}
		return result;
	} catch (error) {
		const message = (error as JsonObject).message as string;
		if (method === 'DELETE' || 'GET' || ('UPDATE' && message)) {
			let newErrorMessage;
			if (message.includes('400')) {
				console.log(message);
				newErrorMessage = JSON.parse(message.split(' - ')[1]);
				(error as JsonObject).message = `For field ID, ${
					newErrorMessage.id || newErrorMessage['[0].id']
				}`;
			}
			if (message.includes('403')) {
				(
					error as JsonObject
				).message = `You don\'t have permissions to ${method.toLowerCase()} ${resource
					.split('/')[1]
					.toLowerCase()}.`;
			}
		}
		throw new NodeApiError(this.getNode(), error as JsonObject);
	}
}

// export async function reasignTickets(
// 	this:
// 		| IHookFunctions
// 		| IExecuteFunctions
// 		| IExecuteSingleFunctions
// 		| ILoadOptionsFunctions
// 		| IPollFunctions,
// 	clientId: string,
// 	reasigmentCliendId: string,
// 	accessToken: string,
// ): Promise<any> {
// 	const response = (await haloPSAApiRequest.call(
// 		this,
// 		'GET',
// 		`/tickets`,
// 		accessToken,
// 		{},
// 		{ client_id: reasigmentCliendId },
// 	)) as IDataObject;

// 	const { tickets } = response;
// 	console.log((tickets as IDataObject[]).map(t => t.id));
// 	const body: IDataObject = {
// 		id: clientId,
// 		client_id: reasigmentCliendId,
// 	};

// 	for (const ticket of (tickets as IDataObject[])) {
// 		console.log(ticket.id);
// 		await haloPSAApiRequest.call(this, 'DELETE', `/tickets/${ticket.id}`, accessToken);
// 	}
// }

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

	const returnData: IDataObject[] = [];

	let responseData: IDataObject;
	query.page_size = 100;
	query.page_no = 1;
	query.pageinate = true;

	do {
		responseData = (await haloPSAApiRequest.call(
			this,
			method,
			endpoint,
			accessToken,
			body,
			query,
		)) as IDataObject;
		returnData.push.apply(returnData, responseData[propertyName] as IDataObject[]);
		query.page_no++;
		//@ts-ignore
	} while (returnData.length < responseData.record_count);

	return returnData;
}

// Utilities ------------------------------------------------------------------------
function getAuthUrl(credentials: IDataObject) {
	return credentials.hostingType === 'on-premise'
		? `${credentials.appUrl}/auth/token`
		: `${credentials.authUrl}/token?tenant=${credentials.tenant}`;
}

export function simplifyHaloPSAGetOutput(
	response: IDataObject[],
	fieldsList: string[],
): IDataObject[] {
	const output = [];
	for (const item of response) {
		const simplifiedItem: IDataObject = {};
		Object.keys(item).forEach((key: string) => {
			if (fieldsList.includes(key)) {
				simplifiedItem[key] = item[key];
			}
		});
		output.push(simplifiedItem);
	}
	return output;
}

export function qsSetStatus(status: string) {
	if (!status) return {};
	const qs: IDataObject = {};
	if (status === 'all') {
		qs['includeinactive'] = true;
		qs['includeactive'] = true;
	} else if (status === 'active') {
		qs['includeinactive'] = false;
		qs['includeactive'] = true;
	} else {
		qs['includeinactive'] = true;
		qs['includeactive'] = false;
	}
	return qs;
}

// Validation -----------------------------------------------------------------------

export async function validateCrendetials(
	this: ICredentialTestFunctions,
	decryptedCredentials: ICredentialDataDecryptedObject,
): Promise<IHaloPSATokens> {
	const credentials = decryptedCredentials;

	const options: OptionsWithUri = {
		headers: {
			'Content-Type': 'application/x-www-form-urlencoded',
		},
		method: 'POST',
		form: {
			client_id: credentials.client_id,
			client_secret: credentials.client_secret,
			grant_type: 'client_credentials',
			scope: credentials.scope,
		},
		uri: getAuthUrl(credentials),
		json: true,
	};

	return (await this.helpers.request!(options)) as IHaloPSATokens;
}