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

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

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

import { documentFields, documentOperations } from './DocumentDescription';

import type { IUpdateBody, IUpdateFields } from './interfaces';

export class GoogleDocs implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'Google Docs',
		name: 'googleDocs',
		icon: 'file:googleDocs.svg',
		group: ['input'],
		version: [1, 2],
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		description: 'Consume Google Docs API.',
		defaults: {
			name: 'Google Docs',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'googleApi',
				required: true,
				displayOptions: {
					show: {
						authentication: ['serviceAccount'],
					},
				},
			},
			{
				name: 'googleDocsOAuth2Api',
				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',
				displayOptions: {
					show: {
						'@version': [1],
					},
				},
			},
			{
				displayName: 'Authentication',
				name: 'authentication',
				type: 'options',
				options: [
					{
						// eslint-disable-next-line n8n-nodes-base/node-param-display-name-miscased
						name: 'OAuth2 (recommended)',
						value: 'oAuth2',
					},
					{
						name: 'Service Account',
						value: 'serviceAccount',
					},
				],
				default: 'oAuth2',
				displayOptions: {
					show: {
						'@version': [2],
					},
				},
			},
			{
				displayName: 'Resource',
				name: 'resource',
				type: 'options',
				noDataExpression: true,
				options: [
					{
						name: 'Document',
						value: 'document',
					},
				],
				default: 'document',
			},
			...documentOperations,
			...documentFields,
		],
	};

	methods = {
		loadOptions: {
			// Get all the drives to display them to user so that he can
			// select them easily
			async getDrives(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [
					{
						name: 'My Drive',
						value: 'myDrive',
					},
					{
						name: 'Shared with Me',
						value: 'sharedWithMe',
					},
				];
				let drives;
				try {
					drives = await googleApiRequestAllItems.call(
						this,
						'drives',
						'GET',
						'',
						{},
						{},
						'https://www.googleapis.com/drive/v3/drives',
					);
				} catch (error) {
					throw new NodeApiError(this.getNode(), error, { message: 'Error in loading Drives' });
				}

				for (const drive of drives) {
					returnData.push({
						name: drive.name as string,
						value: drive.id as string,
					});
				}
				return returnData;
			},
			async getFolders(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [
					{
						name: '/',
						value: 'default',
					},
				];
				const driveId = this.getNodeParameter('driveId');

				const qs = {
					q: `mimeType = \'application/vnd.google-apps.folder\' ${
						driveId === 'sharedWithMe' ? 'and sharedWithMe = true' : " and 'root' in parents"
					}`,
					...(driveId && driveId !== 'myDrive' && driveId !== 'sharedWithMe' ? { driveId } : {}),
				};
				let folders;

				try {
					folders = await googleApiRequestAllItems.call(
						this,
						'files',
						'GET',
						'',
						{},
						qs,
						'https://www.googleapis.com/drive/v3/files',
					);
				} catch (error) {
					throw new NodeApiError(this.getNode(), error, { message: 'Error in loading Folders' });
				}

				for (const folder of folders) {
					returnData.push({
						name: folder.name as string,
						value: folder.id as string,
					});
				}
				return returnData;
			},
		},
	};

	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
		const items = this.getInputData();
		const returnData: INodeExecutionData[] = [];
		const length = items.length;

		let responseData;

		const resource = this.getNodeParameter('resource', 0);
		const operation = this.getNodeParameter('operation', 0);

		for (let i = 0; i < length; i++) {
			try {
				if (resource === 'document') {
					if (operation === 'create') {
						// https://developers.google.com/docs/api/reference/rest/v1/documents/create

						const folderId = this.getNodeParameter('folderId', i) as string;

						const body: IDataObject = {
							name: this.getNodeParameter('title', i) as string,
							mimeType: 'application/vnd.google-apps.document',
							...(folderId && folderId !== 'default' ? { parents: [folderId] } : {}),
						};

						responseData = await googleApiRequest.call(
							this,
							'POST',
							'',
							body,
							{},
							'https://www.googleapis.com/drive/v3/files',
						);
					} else if (operation === 'get') {
						// https://developers.google.com/docs/api/reference/rest/v1/documents/get

						const documentURL = this.getNodeParameter('documentURL', i) as string;
						const simple = this.getNodeParameter('simple', i) as boolean;
						let documentId = extractID(documentURL);

						if (!documentId) {
							documentId = documentURL;
						}
						responseData = await googleApiRequest.call(this, 'GET', `/documents/${documentId}`);
						if (simple) {
							const content = (responseData.body.content as IDataObject[])
								.reduce((arr: string[], contentItem) => {
									if (contentItem?.paragraph) {
										const texts = (
											(contentItem.paragraph as IDataObject).elements as IDataObject[]
										).map((element) => {
											if (element?.textRun) {
												return (element.textRun as IDataObject).content as string;
											}
										}) as string[];
										arr = [...arr, ...texts];
									}
									return arr;
								}, [])
								.join('');

							responseData = {
								documentId,
								content,
							};
						}
					} else if (operation === 'update') {
						// https://developers.google.com/docs/api/reference/rest/v1/documents/batchUpdate

						const documentURL = this.getNodeParameter('documentURL', i) as string;
						let documentId = extractID(documentURL);
						const simple = this.getNodeParameter('simple', i) as boolean;
						const actionsUi = this.getNodeParameter('actionsUi', i) as {
							actionFields: IDataObject[];
						};
						const { writeControlObject } = this.getNodeParameter(
							'updateFields',
							i,
						) as IUpdateFields;

						if (!documentId) {
							documentId = documentURL;
						}

						const body = {
							requests: [],
						} as IUpdateBody;

						if (hasKeys(writeControlObject)) {
							const { control, value } = writeControlObject;
							body.writeControl = {
								[control]: value,
							};
						}

						if (actionsUi) {
							let requestBody: IDataObject;
							actionsUi.actionFields.forEach((actionField) => {
								const { action, object } = actionField;
								if (object === 'positionedObject') {
									if (action === 'delete') {
										requestBody = {
											objectId: actionField.objectId,
										};
									}
								} else if (object === 'pageBreak') {
									if (action === 'insert') {
										const { insertSegment, segmentId, locationChoice, index } = actionField;
										requestBody = {
											[locationChoice as string]: {
												segmentId: insertSegment !== 'body' ? segmentId : '',
												...(locationChoice === 'location' ? { index } : {}),
											},
										};
									}
								} else if (object === 'table') {
									if (action === 'insert') {
										const { rows, columns, insertSegment, locationChoice, segmentId, index } =
											actionField;
										requestBody = {
											rows,
											columns,
											[locationChoice as string]: {
												segmentId: insertSegment !== 'body' ? segmentId : '',
												...(locationChoice === 'location' ? { index } : {}),
											},
										};
									}
								} else if (object === 'footer') {
									if (action === 'create') {
										const { insertSegment, locationChoice, segmentId, index } = actionField;
										requestBody = {
											type: 'DEFAULT',
											sectionBreakLocation: {
												segmentId: insertSegment !== 'body' ? segmentId : '',
												...(locationChoice === 'location' ? { index } : {}),
											},
										};
									} else if (action === 'delete') {
										requestBody = {
											footerId: actionField.footerId,
										};
									}
								} else if (object === 'header') {
									if (action === 'create') {
										const { insertSegment, locationChoice, segmentId, index } = actionField;
										requestBody = {
											type: 'DEFAULT',
											sectionBreakLocation: {
												segmentId: insertSegment !== 'body' ? segmentId : '',
												...(locationChoice === 'location' ? { index } : {}),
											},
										};
									} else if (action === 'delete') {
										requestBody = {
											headerId: actionField.headerId,
										};
									}
								} else if (object === 'tableColumn') {
									if (action === 'insert') {
										const {
											insertPosition,
											rowIndex,
											columnIndex,
											insertSegment,
											segmentId,
											index,
										} = actionField;
										requestBody = {
											insertRight: insertPosition,
											tableCellLocation: {
												rowIndex,
												columnIndex,
												tableStartLocation: {
													segmentId: insertSegment !== 'body' ? segmentId : '',
													index,
												},
											},
										};
									} else if (action === 'delete') {
										const { rowIndex, columnIndex, insertSegment, segmentId, index } = actionField;
										requestBody = {
											tableCellLocation: {
												rowIndex,
												columnIndex,
												tableStartLocation: {
													segmentId: insertSegment !== 'body' ? segmentId : '',
													index,
												},
											},
										};
									}
								} else if (object === 'tableRow') {
									if (action === 'insert') {
										const {
											insertPosition,
											rowIndex,
											columnIndex,
											insertSegment,
											segmentId,
											index,
										} = actionField;
										requestBody = {
											insertBelow: insertPosition,
											tableCellLocation: {
												rowIndex,
												columnIndex,
												tableStartLocation: {
													segmentId: insertSegment !== 'body' ? segmentId : '',
													index,
												},
											},
										};
									} else if (action === 'delete') {
										const { rowIndex, columnIndex, insertSegment, segmentId, index } = actionField;
										requestBody = {
											tableCellLocation: {
												rowIndex,
												columnIndex,
												tableStartLocation: {
													segmentId: insertSegment !== 'body' ? segmentId : '',
													index,
												},
											},
										};
									}
								} else if (object === 'text') {
									if (action === 'insert') {
										const { text, locationChoice, insertSegment, segmentId, index } = actionField;
										requestBody = {
											text,
											[locationChoice as string]: {
												segmentId: insertSegment !== 'body' ? segmentId : '',
												...(locationChoice === 'location' ? { index } : {}),
											},
										};
									} else if (action === 'replaceAll') {
										const { text, replaceText, matchCase } = actionField;
										requestBody = {
											replaceText,
											containsText: { text, matchCase },
										};
									}
								} else if (object === 'paragraphBullets') {
									if (action === 'create') {
										const { bulletPreset, startIndex, insertSegment, segmentId, endIndex } =
											actionField;
										requestBody = {
											bulletPreset,
											range: {
												segmentId: insertSegment !== 'body' ? segmentId : '',
												startIndex,
												endIndex,
											},
										};
									} else if (action === 'delete') {
										const { startIndex, insertSegment, segmentId, endIndex } = actionField;
										requestBody = {
											range: {
												segmentId: insertSegment !== 'body' ? segmentId : '',
												startIndex,
												endIndex,
											},
										};
									}
								} else if (object === 'namedRange') {
									if (action === 'create') {
										const { name, insertSegment, segmentId, startIndex, endIndex } = actionField;
										requestBody = {
											name,
											range: {
												segmentId: insertSegment !== 'body' ? segmentId : '',
												startIndex,
												endIndex,
											},
										};
									} else if (action === 'delete') {
										const { namedRangeReference, value } = actionField;
										requestBody = {
											[namedRangeReference as string]: value,
										};
									}
								}

								body.requests.push({
									[`${action}${upperFirst(object as string)}`]: requestBody,
								});
							});
						}

						responseData = await googleApiRequest.call(
							this,
							'POST',
							`/documents/${documentId}:batchUpdate`,
							body,
						);

						if (simple) {
							if (Object.keys(responseData.replies[0]).length !== 0) {
								const key = Object.keys(responseData.replies[0])[0];
								responseData = responseData.replies[0][key];
							} else {
								responseData = {};
							}
						}
						responseData.documentId = documentId;
					}
				}
			} catch (error) {
				if (this.continueOnFail()) {
					const executionErrorData = this.helpers.constructExecutionMetaData(
						this.helpers.returnJsonArray({ error: error.message }),
						{ itemData: { item: i } },
					);
					returnData.push(...executionErrorData);
					continue;
				}
				throw error;
			}

			const executionData = this.helpers.constructExecutionMetaData(
				this.helpers.returnJsonArray(responseData),
				{ itemData: { item: i } },
			);
			returnData.push(...executionData);
		}

		return this.prepareOutputData(returnData);
	}
}