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

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

import {
	googleApiRequest,
	googleApiRequestAllItems,
} from './GenericFunctions';

export interface IGoogleAuthCredentials {
	email: string;
	privateKey: string;
}

export class GoogleBooks implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'Google Books',
		name: 'googleBooks',
		icon: 'file:googlebooks.svg',
		group: ['input', 'output'],
		version: 1,
		description: 'Read data from Google Books',
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		defaults: {
			name: 'Google Books',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'googleApi',
				required: true,
				displayOptions: {
					show: {
						authentication: [
							'serviceAccount',
						],
					},
				},
			},
			{
				name: 'googleBooksOAuth2Api',
				required: true,
				displayOptions: {
					show: {
						authentication: [
							'oAuth2',
						],
					},
				},
			},
		],
		properties: [
			{
				displayName: 'Authentication',
				name: 'authentication',
				type: 'options',
				options: [
					{
						name: 'Service Account',
						value: 'serviceAccount',
					},
					{
						name: 'OAuth2',
						value: 'oAuth2',
					},
				],
				default: 'serviceAccount',
			},
			{
				displayName: 'Resource',
				name: 'resource',
				type: 'options',
				options: [
					{
						name: 'Bookshelf',
						value: 'bookshelf',
					},
					{
						name: 'Bookshelf Volume',
						value: 'bookshelfVolume',
					},
					{
						name: 'Volume',
						value: 'volume',
					},
				],
				default: 'bookshelf',
				description: 'The resource to operate on.',
			},
			{
				displayName: 'Operation',
				name: 'operation',
				type: 'options',
				options: [
					{
						name: 'Get',
						value: 'get',
						description: 'Retrieve a specific bookshelf resource for the specified user',
					},
					{
						name: 'Get All',
						value: 'getAll',
						description: 'Get all public bookshelf resource for the specified user',
					},
				],
				displayOptions: {
					show: {
						resource: [
							'bookshelf',
						],
					},
				},
				default: 'get',
				description: 'The operation to perform.',
			},
			{
				displayName: 'Operation',
				name: 'operation',
				type: 'options',
				options: [
					{
						name: 'Add',
						value: 'add',
						description: 'Add a volume to a bookshelf',
					},
					{
						name: 'Clear',
						value: 'clear',
						description: 'Clears all volumes from a bookshelf',
					},
					{
						name: 'Get All',
						value: 'getAll',
						description: 'Get all volumes in a specific bookshelf for the specified user',
					},
					{
						name: 'Move',
						value: 'move',
						description: 'Moves a volume within a bookshelf',
					},
					{
						name: 'Remove',
						value: 'remove',
						description: 'Removes a volume from a bookshelf',
					},
				],
				displayOptions: {
					show: {
						resource: [
							'bookshelfVolume',
						],
					},
				},
				default: 'getAll',
				description: 'The operation to perform.',
			},
			{
				displayName: 'Operation',
				name: 'operation',
				type: 'options',
				options: [
					{
						name: 'Get',
						value: 'get',
						description: 'Get a volume resource based on ID',
					},
					{
						name: 'Get All',
						value: 'getAll',
						description: 'Get all volumes filtered by query',
					},
				],
				displayOptions: {
					show: {
						resource: [
							'volume',
						],
					},
				},
				default: 'get',
				description: 'The operation to perform.',
			},
			{
				displayName: 'My Library',
				name: 'myLibrary',
				type: 'boolean',
				default: false,
				required: true,
				displayOptions: {
					show: {
						operation: [
							'get',
							'getAll',
						],
						resource: [
							'bookshelf',
							'bookshelfVolume',
						],
					},
				},
			},

			// ----------------------------------
			//         All
			// ----------------------------------
			{
				displayName: 'Search Query',
				name: 'searchQuery',
				type: 'string',
				description: 'Full-text search query string.',
				default: '',
				required: true,
				displayOptions: {
					show: {
						operation: [
							'getAll',
						],
						resource: [
							'volume',
						],
					},
				},
			},
			{
				displayName: 'User ID',
				name: 'userId',
				type: 'string',
				description: 'ID of user',
				default: '',
				required: true,
				displayOptions: {
					show: {
						operation: [
							'get',
							'getAll',
						],
						resource: [
							'bookshelf',
							'bookshelfVolume',
						],
					},
					hide: {
						myLibrary: [
							true,
						],
					},
				},
			},
			{
				displayName: 'Bookshelf ID',
				name: 'shelfId',
				type: 'string',
				description: 'ID of the bookshelf.',
				default: '',
				required: true,
				displayOptions: {
					show: {
						operation: [
							'get',
							'add',
							'clear',
							'move',
							'remove',
						],
						resource: [
							'bookshelf',
							'bookshelfVolume',
						],
					},
				},
			},
			{
				displayName: 'Bookshelf ID',
				name: 'shelfId',
				type: 'string',
				description: 'ID of the bookshelf.',
				default: '',
				required: true,
				displayOptions: {
					show: {
						operation: [
							'getAll',
						],
						resource: [
							'bookshelfVolume',
						],
					},
				},
			},
			{
				displayName: 'Volume ID',
				name: 'volumeId',
				type: 'string',
				description: 'ID of the volume.',
				default: '',
				required: true,
				displayOptions: {
					show: {
						operation: [
							'add',
							'move',
							'remove',
							'get',
						],
						resource: [
							'bookshelfVolume',
							'volume',
						],
					},
				},
			},
			{
				displayName: 'Volume Position',
				name: 'volumePosition',
				type: 'string',
				description: 'Position on shelf to move the item (0 puts the item before the current first item, 1 puts it between the first and the second and so on).',
				default: '',
				required: true,
				displayOptions: {
					show: {
						operation: [
							'move',
						],
						resource: [
							'bookshelfVolume',
						],
					},
				},
			},
			{
				displayName: 'Return All',
				name: 'returnAll',
				type: 'boolean',
				displayOptions: {
					show: {
						operation: [
							'getAll',
						],
					},
				},
				default: false,
				description: 'If all results should be returned or only up to a given limit.',
			},
			{
				displayName: 'Limit',
				name: 'limit',
				type: 'number',
				displayOptions: {
					show: {
						operation: [
							'getAll',
						],
						returnAll: [
							false,
						],
					},
				},
				typeOptions: {
					minValue: 1,
					maxValue: 40,
				},
				default: 40,
				description: 'How many results to return.',
			},
		],
	};

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

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

				if (resource === 'volume') {
					if (operation === 'get') {
						const volumeId = this.getNodeParameter('volumeId', i) as string;
						responseData = await googleApiRequest.call(this, 'GET', `v1/volumes/${volumeId}`, {});
					} else if (operation === 'getAll') {
						const searchQuery = this.getNodeParameter('searchQuery', i) as string;
						const returnAll = this.getNodeParameter('returnAll', i) as boolean;
						if (returnAll) {
							responseData = await googleApiRequestAllItems.call(this, 'items', 'GET', `v1/volumes?q=${searchQuery}`, {});
						} else {
							qs.maxResults = this.getNodeParameter('limit', i) as number;
							responseData = await googleApiRequest.call(this, 'GET', `v1/volumes?q=${searchQuery}`, {}, qs);
							responseData = responseData.items || [];
						}
					}
				}

				if (resource === 'bookshelf') {
					if (operation === 'get') {
						const shelfId = this.getNodeParameter('shelfId', i) as string;
						const myLibrary = this.getNodeParameter('myLibrary', i) as boolean;
						let endpoint;
						if (myLibrary === false) {
							const userId = this.getNodeParameter('userId', i) as string;
							endpoint = `v1/users/${userId}/bookshelves/${shelfId}`;
						} else {
							endpoint = `v1/mylibrary/bookshelves/${shelfId}`;
						}

						responseData = await googleApiRequest.call(this, 'GET', endpoint, {});
					} else if (operation === 'getAll') {
						const myLibrary = this.getNodeParameter('myLibrary', i) as boolean;
						const returnAll = this.getNodeParameter('returnAll', i) as boolean;
						let endpoint;
						if (myLibrary === false) {
							const userId = this.getNodeParameter('userId', i) as string;
							endpoint = `v1/users/${userId}/bookshelves`;
						} else {
							endpoint = `v1/mylibrary/bookshelves`;
						}
						if (returnAll) {
							responseData = await googleApiRequestAllItems.call(this, 'items', 'GET', endpoint, {});
						} else {
							qs.maxResults = this.getNodeParameter('limit', i) as number;
							responseData = await googleApiRequest.call(this, 'GET', endpoint, {}, qs);
							responseData = responseData.items || [];
						}
					}
				}

				if (resource === 'bookshelfVolume') {
					if (operation === 'add') {
						const shelfId = this.getNodeParameter('shelfId', i) as string;
						const volumeId = this.getNodeParameter('volumeId', i) as string;
						const body: IDataObject = {
							volumeId,
						};
						responseData = await googleApiRequest.call(this, 'POST', `v1/mylibrary/bookshelves/${shelfId}/addVolume`, body);
					}

					if (operation === 'clear') {
						const shelfId = this.getNodeParameter('shelfId', i) as string;
						responseData = await googleApiRequest.call(this, 'POST', `v1/mylibrary/bookshelves/${shelfId}/clearVolumes`);
					}

					if (operation === 'getAll') {
						const shelfId = this.getNodeParameter('shelfId', i) as string;
						const returnAll = this.getNodeParameter('returnAll', i) as boolean;
						const myLibrary = this.getNodeParameter('myLibrary', i) as boolean;
						let endpoint;
						if (myLibrary === false) {
							const userId = this.getNodeParameter('userId', i) as string;
							endpoint = `v1/users/${userId}/bookshelves/${shelfId}/volumes`;
						} else {
							endpoint = `v1/mylibrary/bookshelves/${shelfId}/volumes`;
						}
						if (returnAll) {
							responseData = await googleApiRequestAllItems.call(this, 'items', 'GET', endpoint, {});
						} else {
							qs.maxResults = this.getNodeParameter('limit', i) as number;
							responseData = await googleApiRequest.call(this, 'GET', endpoint, {}, qs);
							responseData = responseData.items || [];
						}
					}

					if (operation === 'move') {
						const shelfId = this.getNodeParameter('shelfId', i) as string;
						const volumeId = this.getNodeParameter('volumeId', i) as string;
						const volumePosition = this.getNodeParameter('volumePosition', i) as number;
						const body: IDataObject = {
							volumeId,
							volumePosition,
						};
						responseData = await googleApiRequest.call(this, 'POST', `v1/mylibrary/bookshelves/${shelfId}/moveVolume`, body);
					}

					if (operation === 'remove') {
						const shelfId = this.getNodeParameter('shelfId', i) as string;
						const volumeId = this.getNodeParameter('volumeId', i) as string;
						const body: IDataObject = {
							volumeId,
						};
						responseData = await googleApiRequest.call(this, 'POST', `v1/mylibrary/bookshelves/${shelfId}/removeVolume`, body);
					}
				}
				if (Array.isArray(responseData)) {
					returnData.push.apply(returnData, responseData as IDataObject[]);
				} else {
					returnData.push(responseData as IDataObject);
				}

			} catch (error) {
				if (this.continueOnFail()) {
					returnData.push({ error: error.message });
					continue;
				}
				throw error;
			}
		}
		return [this.helpers.returnJsonArray(responseData)];
	}
}