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

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

import {
	microsoftApiRequest,
	microsoftApiRequestAllItems,
	microsoftApiRequestAllItemsSkip,
} from './GenericFunctions';

import {
	workbookFields,
	workbookOperations,
} from './WorkbookDescription';

import {
	worksheetFields,
	worksheetOperations,
} from './WorksheetDescription';

import {
	tableFields,
	tableOperations,
} from './TableDescription';

export class MicrosoftExcel implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'Microsoft Excel',
		name: 'microsoftExcel',
		icon: 'file:excel.png',
		group: ['input'],
		version: 1,
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		description: 'Consume Microsoft Excel API.',
		defaults: {
			name: 'Microsoft Excel',
			color: '#1c6d40',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'microsoftExcelOAuth2Api',
				required: true,
			},
		],
		properties: [
			{
				displayName: 'Resource',
				name: 'resource',
				type: 'options',
				options: [
					{
						name: 'Table',
						value: 'table',
						description: 'Represents an Excel table.',
					},
					{
						name: 'Workbook',
						value: 'workbook',
						description: 'Workbook is the top level object which contains related workbook objects such as worksheets, tables, ranges, etc.',
					},
					{
						name: 'Worksheet',
						value: 'worksheet',
						description: 'An Excel worksheet is a grid of cells. It can contain data, tables, charts, etc.',
					},
				],
				default: 'workbook',
				description: 'The resource to operate on.',
			},
			...workbookOperations,
			...workbookFields,
			...worksheetOperations,
			...worksheetFields,
			...tableOperations,
			...tableFields,
		],
	};

	methods = {
		loadOptions: {
			// Get all the workbooks to display them to user so that he can
			// select them easily
			async getWorkbooks(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const qs: IDataObject = {
					select: 'id,name',
				};
				const returnData: INodePropertyOptions[] = [];
				const workbooks = await microsoftApiRequestAllItems.call(this, 'value', 'GET', `/drive/root/search(q='.xlsx')`, {}, qs);
				for (const workbook of workbooks) {
					const workbookName = workbook.name;
					const workbookId = workbook.id;
					returnData.push({
						name: workbookName,
						value: workbookId,
					});
				}
				return returnData;
			},
			// Get all the worksheets to display them to user so that he can
			// select them easily
			async getworksheets(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const workbookId = this.getCurrentNodeParameter('workbook');
				const qs: IDataObject = {
					select: 'id,name',
				};
				const returnData: INodePropertyOptions[] = [];
				const worksheets = await microsoftApiRequestAllItems.call(this, 'value', 'GET', `/drive/items/${workbookId}/workbook/worksheets`, {}, qs);
				for (const worksheet of worksheets) {
					const worksheetName = worksheet.name;
					const worksheetId = worksheet.id;
					returnData.push({
						name: worksheetName,
						value: worksheetId,
					});
				}
				return returnData;
			},
			// Get all the tables to display them to user so that he can
			// select them easily
			async getTables(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const workbookId = this.getCurrentNodeParameter('workbook');
				const worksheetId = this.getCurrentNodeParameter('worksheet');
				const qs: IDataObject = {
					select: 'id,name',
				};
				const returnData: INodePropertyOptions[] = [];
				const tables = await microsoftApiRequestAllItems.call(this, 'value', 'GET', `/drive/items/${workbookId}/workbook/worksheets/${worksheetId}/tables`, {}, qs);
				for (const table of tables) {
					const tableName = table.name;
					const tableId = table.id;
					returnData.push({
						name: tableName,
						value: tableId,
					});
				}
				return returnData;
			},
		},
	};

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

		if (resource === 'table') {
			//https://docs.microsoft.com/en-us/graph/api/table-post-rows?view=graph-rest-1.0&tabs=http
			if (operation === 'addRow') {
				// TODO: At some point it should be possible to use item dependent parameters.
				//       Is however important to then not make one separate request each.
				const workbookId = this.getNodeParameter('workbook', 0) as string;
				const worksheetId = this.getNodeParameter('worksheet', 0) as string;
				const tableId = this.getNodeParameter('table', 0) as string;
				const additionalFields = this.getNodeParameter('additionalFields', 0) as IDataObject;
				const body: IDataObject = {};

				if (additionalFields.index) {
					body.index = additionalFields.index as number;
				}

				// Get table columns to eliminate any columns not needed on the input
				responseData = await microsoftApiRequest.call(this, 'GET', `/drive/items/${workbookId}/workbook/worksheets/${worksheetId}/tables/${tableId}/columns`, {}, qs);
				const columns = responseData.value.map((column: IDataObject) => (column.name));

				const rows: any[][] = []; // tslint:disable-line:no-any

				// Bring the items into the correct format
				for (const item of items) {
					const row = [];
					for (const column of columns) {
						row.push(item.json[column]);
					}
					rows.push(row);
				}

				body.values = rows;
				const { id } = await microsoftApiRequest.call(this, 'POST', `/drive/items/${workbookId}/workbook/createSession`, { persistChanges: true });
				responseData = await microsoftApiRequest.call(this, 'POST', `/drive/items/${workbookId}/workbook/worksheets/${worksheetId}/tables/${tableId}/rows/add`, body, {}, '', { 'workbook-session-id': id });
				await microsoftApiRequest.call(this, 'POST', `/drive/items/${workbookId}/workbook/closeSession`, {}, {}, '', { 'workbook-session-id': id });

				if (Array.isArray(responseData)) {
					returnData.push.apply(returnData, responseData as IDataObject[]);
				} else if (responseData !== undefined) {
					returnData.push(responseData as IDataObject);
				}
			}
			//https://docs.microsoft.com/en-us/graph/api/table-list-columns?view=graph-rest-1.0&tabs=http
			if (operation === 'getColumns') {
				for (let i = 0; i < length; i++) {
					qs = {};
					const workbookId = this.getNodeParameter('workbook', i) as string;
					const worksheetId = this.getNodeParameter('worksheet', i) as string;
					const tableId = this.getNodeParameter('table', i) as string;
					const returnAll = this.getNodeParameter('returnAll', i) as boolean;
					const rawData = this.getNodeParameter('rawData', i) as boolean;
					if (rawData) {
						const filters = this.getNodeParameter('filters', i) as IDataObject;
						if (filters.fields) {
							qs['$select'] = filters.fields;
						}
					}
					if (returnAll === true) {
						responseData = await microsoftApiRequestAllItemsSkip.call(this, 'value', 'GET', `/drive/items/${workbookId}/workbook/worksheets/${worksheetId}/tables/${tableId}/columns`, {}, qs);
					} else {
						qs['$top'] = this.getNodeParameter('limit', i) as number;
						responseData = await microsoftApiRequest.call(this, 'GET', `/drive/items/${workbookId}/workbook/worksheets/${worksheetId}/tables/${tableId}/columns`, {}, qs);
						responseData = responseData.value;
					}
					if (!rawData) {
						responseData = responseData.map((column: IDataObject) => ({ name: column.name }));
					} else {
						const dataProperty = this.getNodeParameter('dataProperty', i) as string;
						responseData = { [dataProperty] : responseData };
					}

					if (Array.isArray(responseData)) {
						returnData.push.apply(returnData, responseData as IDataObject[]);
					} else if (responseData !== undefined) {
						returnData.push(responseData as IDataObject);
					}
				}
			}
			//https://docs.microsoft.com/en-us/graph/api/table-list-rows?view=graph-rest-1.0&tabs=http
			if (operation === 'getRows') {
				for (let i = 0; i < length; i++) {
					qs = {};
					const workbookId = this.getNodeParameter('workbook', i) as string;
					const worksheetId = this.getNodeParameter('worksheet', i) as string;
					const tableId = this.getNodeParameter('table', i) as string;
					const returnAll = this.getNodeParameter('returnAll', i) as boolean;
					const rawData = this.getNodeParameter('rawData', i) as boolean;
					if (rawData) {
						const filters = this.getNodeParameter('filters', i) as IDataObject;
						if (filters.fields) {
							qs['$select'] = filters.fields;
						}
					}
					if (returnAll === true) {
						responseData = await microsoftApiRequestAllItemsSkip.call(this, 'value', 'GET', `/drive/items/${workbookId}/workbook/worksheets/${worksheetId}/tables/${tableId}/rows`, {}, qs);
					} else {
						const rowsQs = { ...qs };
						rowsQs['$top'] = this.getNodeParameter('limit', i) as number;
						responseData = await microsoftApiRequest.call(this, 'GET', `/drive/items/${workbookId}/workbook/worksheets/${worksheetId}/tables/${tableId}/rows`, {}, rowsQs);
						responseData = responseData.value;
					}
					if (!rawData) {
						const columnsQs = { ...qs };
						columnsQs['$select'] = 'name';
						// TODO: That should probably be cached in the future
						let columns = await microsoftApiRequestAllItemsSkip.call(this, 'value', 'GET', `/drive/items/${workbookId}/workbook/worksheets/${worksheetId}/tables/${tableId}/columns`, {}, columnsQs);
						//@ts-ignore
						columns = columns.map(column => column.name);
						for (let i = 0; i < responseData.length; i++) {
							const object: IDataObject = {};
							for (let y = 0; y < columns.length; y++) {
								object[columns[y]] = responseData[i].values[0][y];
							}
							returnData.push({ ...object });
						}
					} else {
						const dataProperty = this.getNodeParameter('dataProperty', i) as string;
						returnData.push({ [dataProperty]: responseData });
					}
				}
			}
			if (operation === 'lookup') {
				for (let i = 0; i < length; i++) {
					qs = {};
					const workbookId = this.getNodeParameter('workbook', i) as string;
					const worksheetId = this.getNodeParameter('worksheet', i) as string;
					const tableId = this.getNodeParameter('table', i) as string;
					const lookupColumn = this.getNodeParameter('lookupColumn', i) as string;
					const lookupValue = this.getNodeParameter('lookupValue', i) as string;
					const options = this.getNodeParameter('options', i) as IDataObject;

					responseData = await microsoftApiRequestAllItemsSkip.call(this, 'value', 'GET', `/drive/items/${workbookId}/workbook/worksheets/${worksheetId}/tables/${tableId}/rows`, {}, {});

					qs['$select'] = 'name';
					// TODO: That should probably be cached in the future
					let columns = await microsoftApiRequestAllItemsSkip.call(this, 'value', 'GET', `/drive/items/${workbookId}/workbook/worksheets/${worksheetId}/tables/${tableId}/columns`, {}, qs);
					columns = columns.map((column: IDataObject) => column.name);

					if (!columns.includes(lookupColumn)) {
						throw new Error(`Column ${lookupColumn} does not exist on the table selected`);
					}

					result.length = 0;
					for (let i = 0; i < responseData.length; i++) {
						const object: IDataObject = {};
						for (let y = 0; y < columns.length; y++) {
							object[columns[y]] = responseData[i].values[0][y];
						}
						result.push({ ...object });
					}

					if (options.returnAllMatches) {
						responseData = result.filter((data: IDataObject) => {
							return (data[lookupColumn]?.toString() === lookupValue );
						});
						returnData.push.apply(returnData, responseData as IDataObject[]);
					} else {
						responseData = result.find((data: IDataObject) => {
							return (data[lookupColumn]?.toString() === lookupValue );
						});
						returnData.push(responseData as IDataObject);
					}
				}
			}
		}
		if (resource === 'workbook') {
			for (let i = 0; i < length; i++) {
				qs = {};
				//https://docs.microsoft.com/en-us/graph/api/worksheetcollection-add?view=graph-rest-1.0&tabs=http
				if (operation === 'addWorksheet') {
					const workbookId = this.getNodeParameter('workbook', i) as string;
					const additionalFields = this.getNodeParameter('additionalFields', i) as IDataObject;
					const body: IDataObject = {};
					if (additionalFields.name) {
						body.name = additionalFields.name;
					}
					const { id } = await microsoftApiRequest.call(this, 'POST', `/drive/items/${workbookId}/workbook/createSession`, { persistChanges: true });
					responseData = await microsoftApiRequest.call(this, 'POST', `/drive/items/${workbookId}/workbook/worksheets/add`, body, {}, '', { 'workbook-session-id': id });
					await microsoftApiRequest.call(this, 'POST', `/drive/items/${workbookId}/workbook/closeSession`, {}, {}, '', { 'workbook-session-id': id });
				}
				if (operation === 'getAll') {
					const returnAll = this.getNodeParameter('returnAll', i) as boolean;
					const filters = this.getNodeParameter('filters', i) as IDataObject;
					if (filters.fields) {
						qs['$select'] = filters.fields;
					}
					if (returnAll === true) {
						responseData = await microsoftApiRequestAllItems.call(this, 'value', 'GET', `/drive/root/search(q='.xlsx')`, {}, qs);
					} else {
						qs['$top'] = this.getNodeParameter('limit', i) as number;
						responseData = await microsoftApiRequest.call(this, 'GET', `/drive/root/search(q='.xlsx')`, {}, qs);
						responseData = responseData.value;
					}
				}

				if (Array.isArray(responseData)) {
					returnData.push.apply(returnData, responseData as IDataObject[]);
				} else if (responseData !== undefined) {
					returnData.push(responseData as IDataObject);
				}
			}
		}
		if (resource === 'worksheet') {
			for (let i = 0; i < length; i++) {
				qs = {};
				//https://docs.microsoft.com/en-us/graph/api/workbook-list-worksheets?view=graph-rest-1.0&tabs=http
				if (operation === 'getAll') {
					const returnAll = this.getNodeParameter('returnAll', i) as boolean;
					const workbookId = this.getNodeParameter('workbook', i) as string;
					const filters = this.getNodeParameter('filters', i) as IDataObject;
					if (filters.fields) {
						qs['$select'] = filters.fields;
					}
					if (returnAll === true) {
						responseData = await microsoftApiRequestAllItems.call(this, 'value', 'GET', `/drive/items/${workbookId}/workbook/worksheets`, {}, qs);
					} else {
						qs['$top'] = this.getNodeParameter('limit', i) as number;
						responseData = await microsoftApiRequest.call(this, 'GET', `/drive/items/${workbookId}/workbook/worksheets`, {}, qs);
						responseData = responseData.value;
					}
				}
				//https://docs.microsoft.com/en-us/graph/api/worksheet-range?view=graph-rest-1.0&tabs=http
				if (operation === 'getContent') {
					const workbookId = this.getNodeParameter('workbook', i) as string;
					const worksheetId = this.getNodeParameter('worksheet', i) as string;
					const range = this.getNodeParameter('range', i) as string;
					const rawData = this.getNodeParameter('rawData', i) as boolean;
					if (rawData) {
						const filters = this.getNodeParameter('filters', i) as IDataObject;
						if (filters.fields) {
							qs['$select'] = filters.fields;
						}
					}

					responseData = await microsoftApiRequest.call(this, 'GET', `/drive/items/${workbookId}/workbook/worksheets/${worksheetId}/range(address='${range}')`, {}, qs);

					if (!rawData) {
						const keyRow = this.getNodeParameter('keyRow', i) as number;
						const dataStartRow = this.getNodeParameter('dataStartRow', i) as number;
						if (responseData.values === null) {
							throw new Error('Range did not return data');
						}
						const keyValues = responseData.values[keyRow];
						for (let i = dataStartRow; i < responseData.values.length; i++) {
							const object: IDataObject = {};
							for (let y = 0; y < keyValues.length; y++) {
								object[keyValues[y]] = responseData.values[i][y];
							}
							returnData.push({ ...object });
						}
					} else {
						const dataProperty = this.getNodeParameter('dataProperty', i) as string;
						returnData.push({ [dataProperty]: responseData });
					}
				}
			}
		}

		return [this.helpers.returnJsonArray(returnData)];
	}
}