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

import {
	IDataObject,
	INodePropertyOptions,
	NodeApiError,
	NodeOperationError,
} from 'n8n-workflow';

import {
	OptionsWithUri,
} from 'request';

export interface ICustomInterface {
	name: string;
	key: string;
	field_type: string;
	options?: Array<{
		id: number;
		label: string;
	}>;
}

export interface ICustomProperties {
	[key: string]: ICustomInterface;
}

/**
 * Make an API request to Pipedrive
 *
 * @param {IHookFunctions} this
 * @param {string} method
 * @param {string} url
 * @param {object} body
 * @returns {Promise<any>}
 */
export async function pipedriveApiRequest(this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions, method: string, endpoint: string, body: IDataObject, query: IDataObject = {}, formData?: IDataObject, downloadFile?: boolean): Promise<any> { // tslint:disable-line:no-any
	const authenticationMethod = this.getNodeParameter('authentication', 0);

	const options: OptionsWithUri = {
		headers: {
			Accept: 'application/json',
		},
		method,
		qs: query,
		uri: `https://api.pipedrive.com/v1${endpoint}`,
	};

	if (downloadFile === true) {
		options.encoding = null;
	} else {
		options.json = true;
	}

	if (Object.keys(body).length !== 0) {
		options.body = body;
	}

	if (formData !== undefined && Object.keys(formData).length !== 0) {
		options.formData = formData;
	}

	if (query === undefined) {
		query = {};
	}

	try {
		const credentialType = authenticationMethod === 'apiToken' ? 'pipedriveApi' : 'pipedriveOAuth2Api';
		const responseData = await this.helpers.requestWithAuthentication.call(this, credentialType, options);

		if (downloadFile === true) {
			return {
				data: responseData,
			};
		}

		if (responseData.success === false) {
			throw new NodeApiError(this.getNode(), responseData);
		}

		return {
			additionalData: responseData.additional_data,
			data: (responseData.data === null) ? [] : responseData.data,
		};
	} catch (error) {
		throw new NodeApiError(this.getNode(), error);
	}
}

/**
 * Make an API request to paginated Pipedrive endpoint
 * and return all results
 *
 * @export
 * @param {(IHookFunctions | IExecuteFunctions)} this
 * @param {string} method
 * @param {string} endpoint
 * @param {IDataObject} body
 * @param {IDataObject} [query]
 * @returns {Promise<any>}
 */
export async function pipedriveApiRequestAllItems(this: IHookFunctions | IExecuteFunctions, method: string, endpoint: string, body: IDataObject, query?: IDataObject): Promise<any> { // tslint:disable-line:no-any

	if (query === undefined) {
		query = {};
	}
	query.limit = 100;
	query.start = 0;

	const returnData: IDataObject[] = [];

	let responseData;

	do {
		responseData = await pipedriveApiRequest.call(this, method, endpoint, body, query);
		// the search path returns data diferently
		if (responseData.data.items) {
			returnData.push.apply(returnData, responseData.data.items);
		} else {
			returnData.push.apply(returnData, responseData.data);
		}

		query.start = responseData.additionalData.pagination.next_start;
	} while (
		responseData.additionalData !== undefined &&
		responseData.additionalData.pagination !== undefined &&
		responseData.additionalData.pagination.more_items_in_collection === true
	);

	return {
		data: returnData,
	};
}



/**
 * Gets the custom properties from Pipedrive
 *
 * @export
 * @param {(IHookFunctions | IExecuteFunctions)} this
 * @param {string} resource
 * @returns {Promise<ICustomProperties>}
 */
export async function pipedriveGetCustomProperties(this: IHookFunctions | IExecuteFunctions, resource: string): Promise<ICustomProperties> {

	const endpoints: { [key: string]: string } = {
		'activity': '/activityFields',
		'deal': '/dealFields',
		'organization': '/organizationFields',
		'person': '/personFields',
		'product': '/productFields',
	};

	if (endpoints[resource] === undefined) {
		throw new NodeOperationError(this.getNode(), `The resource "${resource}" is not supported for resolving custom values!`);
	}

	const requestMethod = 'GET';

	const body = {};
	const qs = {};
	// Get the custom properties and their values
	const responseData = await pipedriveApiRequest.call(this, requestMethod, endpoints[resource], body, qs);

	const customProperties: ICustomProperties = {};

	for (const customPropertyData of responseData.data) {
		customProperties[customPropertyData.key] = customPropertyData;
	}
	return customProperties;
}



/**
 * Converts names and values of custom properties from their actual values to the
 * Pipedrive internal ones
 *
 * @export
 * @param {ICustomProperties} customProperties
 * @param {IDataObject} item
 */
export function pipedriveEncodeCustomProperties(customProperties: ICustomProperties, item: IDataObject): void {
	let customPropertyData;

	for (const key of Object.keys(item)) {
		customPropertyData = Object.values(customProperties).find(customPropertyData => customPropertyData.name === key);

		if (customPropertyData !== undefined) {
			// Is a custom property

			// Check if also the value has to be resolved or just the key
			if (item[key] !== null && item[key] !== undefined && customPropertyData.options !== undefined && Array.isArray(customPropertyData.options)) {
				// Has an option key so get the actual option-value
				const propertyOption = customPropertyData.options.find(option => option.label.toString() === item[key]!.toString());

				if (propertyOption !== undefined) {
					item[customPropertyData.key as string] = propertyOption.id;
					delete item[key];
				}
			} else {
				// Does already represent the actual value or is null
				item[customPropertyData.key as string] = item[key];
				delete item[key];
			}
		}
	}
}



/**
 * Converts names and values of custom properties to their actual values
 *
 * @export
 * @param {ICustomProperties} customProperties
 * @param {IDataObject} item
 */
export function pipedriveResolveCustomProperties(customProperties: ICustomProperties, item: IDataObject): void {
	let customPropertyData;

	// Itterate over all keys and replace the custom ones
	for (const key of Object.keys(item)) {

		if (customProperties[key] !== undefined) {
			// Is a custom property
			customPropertyData = customProperties[key];

			// value is not set, so nothing to resolve
			if (item[key] === null) {
				item[customPropertyData.name] = item[key];
				delete item[key];
				continue;
			}

			if ([
				'date',
				'address',
				'double',
				'monetary',
				'org',
				'people',
				'phone',
				'text',
				'time',
				'user',
				'varchar',
				'varchar_auto',
				'int',
				'time',
				'timerange',
			].includes(customPropertyData.field_type)) {
					item[customPropertyData.name as string] = item[key];
					delete item[key];
				// type options
			} else if (['enum', 'visible_to'].includes(customPropertyData.field_type) && customPropertyData.options) {
				const propertyOption = customPropertyData.options.find(option => option.id.toString() === item[key]!.toString());
				if (propertyOption !== undefined) {
					item[customPropertyData.name as string] = propertyOption.label;
					delete item[key];
				}
				// type multioptions
			} else if (['set'].includes(customPropertyData.field_type) && customPropertyData.options) {
				const selectedIds = (item[key] as string).split(',');
				const selectedLabels = customPropertyData.options.
				filter(option => selectedIds.includes(option.id.toString())).
				map(option => option.label);
				item[customPropertyData.name] = selectedLabels;
				delete item[key];
			}
		}
	}
}

export function sortOptionParameters(optionParameters: INodePropertyOptions[]): INodePropertyOptions[] {
	optionParameters.sort((a, b) => {
		const aName = a.name.toLowerCase();
		const bName = b.name.toLowerCase();
		if (aName < bName) { return -1; }
		if (aName > bName) { return 1; }
		return 0;
	});

	return optionParameters;
}