import type {
	IDataObject,
	IExecuteFunctions,
	INodeExecutionData,
	INodeProperties,
} from 'n8n-workflow';
import { NodeOperationError } from 'n8n-workflow';
import { v4 as uuid } from 'uuid';
import type { TableSchema } from '../../helpers/interfaces';
import { checkSchema, wrapData } from '../../helpers/utils';
import { googleApiRequest } from '../../transport';
import { generatePairedItemData, updateDisplayOptions } from '@utils/utilities';

const properties: INodeProperties[] = [
	{
		displayName: 'Data Mode',
		name: 'dataMode',
		type: 'options',
		options: [
			{
				name: 'Auto-Map Input Data',
				value: 'autoMap',
				description: 'Use when node input properties match destination field names',
			},
			{
				name: 'Map Each Field Below',
				value: 'define',
				description: 'Set the value for each destination field',
			},
		],
		default: 'autoMap',
		description: 'Whether to insert the input data this node receives in the new row',
	},
	{
		displayName:
			"In this mode, make sure the incoming data fields are named the same as the columns in BigQuery. (Use a 'set' node before this node to change them if required.)",
		name: 'info',
		type: 'notice',
		default: '',
		displayOptions: {
			show: {
				dataMode: ['autoMap'],
			},
		},
	},
	{
		displayName: 'Fields to Send',
		name: 'fieldsUi',
		placeholder: 'Add Field',
		type: 'fixedCollection',
		typeOptions: {
			multipleValueButtonText: 'Add Field',
			multipleValues: true,
		},
		default: {},
		options: [
			{
				displayName: 'Field',
				name: 'values',
				values: [
					{
						displayName: 'Field Name or ID',
						name: 'fieldId',
						type: 'options',
						description:
							'Choose from the list, or specify an ID using an <a href="https://docs.n8n.io/code-examples/expressions/">expression</a>',
						typeOptions: {
							loadOptionsDependsOn: ['projectId.value', 'datasetId.value', 'tableId.value'],
							loadOptionsMethod: 'getSchema',
						},
						default: '',
					},
					{
						displayName: 'Field Value',
						name: 'fieldValue',
						type: 'string',
						default: '',
					},
				],
			},
		],
		displayOptions: {
			show: {
				dataMode: ['define'],
			},
		},
	},
	{
		displayName: 'Options',
		name: 'options',
		type: 'collection',
		placeholder: 'Add Options',
		default: {},
		options: [
			{
				displayName: 'Batch Size',
				name: 'batchSize',
				type: 'number',
				default: 100,
				typeOptions: {
					minValue: 1,
				},
			},
			{
				displayName: 'Ignore Unknown Values',
				name: 'ignoreUnknownValues',
				type: 'boolean',
				default: false,
				description: 'Whether to gnore row values that do not match the schema',
			},
			{
				displayName: 'Skip Invalid Rows',
				name: 'skipInvalidRows',
				type: 'boolean',
				default: false,
				description: 'Whether to skip rows with values that do not match the schema',
			},
			{
				displayName: 'Template Suffix',
				name: 'templateSuffix',
				type: 'string',
				default: '',
				description:
					'Create a new table based on the destination table and insert rows into the new table. The new table will be named <code>{destinationTable}{templateSuffix}</code>',
			},
			{
				displayName: 'Trace ID',
				name: 'traceId',
				type: 'string',
				default: '',
				description:
					'Unique ID for the request, for debugging only. It is case-sensitive, limited to up to 36 ASCII characters. A UUID is recommended.',
			},
		],
	},
];

const displayOptions = {
	show: {
		resource: ['database'],
		operation: ['insert'],
	},
};

export const description = updateDisplayOptions(displayOptions, properties);

export async function execute(this: IExecuteFunctions): Promise<INodeExecutionData[]> {
	// https://cloud.google.com/bigquery/docs/reference/rest/v2/tabledata/insertAll
	const projectId = this.getNodeParameter('projectId', 0, undefined, {
		extractValue: true,
	});
	const datasetId = this.getNodeParameter('datasetId', 0, undefined, {
		extractValue: true,
	});
	const tableId = this.getNodeParameter('tableId', 0, undefined, {
		extractValue: true,
	});

	const options = this.getNodeParameter('options', 0);
	const dataMode = this.getNodeParameter('dataMode', 0) as string;

	let batchSize = 100;
	if (options.batchSize) {
		batchSize = options.batchSize as number;
		delete options.batchSize;
	}

	const items = this.getInputData();
	const length = items.length;

	const returnData: INodeExecutionData[] = [];
	const rows: IDataObject[] = [];
	const body: IDataObject = {};

	Object.assign(body, options);
	if (body.traceId === undefined) {
		body.traceId = uuid();
	}

	const schema = (
		await googleApiRequest.call(
			this,
			'GET',
			`/v2/projects/${projectId}/datasets/${datasetId}/tables/${tableId}`,
			{},
		)
	).schema as TableSchema;

	if (schema === undefined) {
		throw new NodeOperationError(this.getNode(), 'The destination table has no defined schema');
	}

	for (let i = 0; i < length; i++) {
		try {
			const record: IDataObject = {};

			if (dataMode === 'autoMap') {
				schema.fields.forEach(({ name }) => {
					record[name] = items[i].json[name];
				});
			}

			if (dataMode === 'define') {
				const fields = this.getNodeParameter('fieldsUi.values', i, []) as IDataObject[];

				fields.forEach(({ fieldId, fieldValue }) => {
					record[`${fieldId}`] = fieldValue;
				});
			}

			rows.push({ json: checkSchema.call(this, schema, record, i) });
		} catch (error) {
			if (this.continueOnFail()) {
				const executionErrorData = this.helpers.constructExecutionMetaData(
					this.helpers.returnJsonArray({ error: error.message }),
					{ itemData: { item: i } },
				);
				returnData.push(...executionErrorData);
				continue;
			}
			throw new NodeOperationError(this.getNode(), error.message as string, {
				itemIndex: i,
				description: error?.description,
			});
		}
	}

	const itemData = generatePairedItemData(items.length);
	for (let i = 0; i < rows.length; i += batchSize) {
		const batch = rows.slice(i, i + batchSize);
		body.rows = batch;

		const responseData = await googleApiRequest.call(
			this,
			'POST',
			`/v2/projects/${projectId}/datasets/${datasetId}/tables/${tableId}/insertAll`,
			body,
		);

		if (responseData?.insertErrors && !options.skipInvalidRows) {
			const errors: string[] = [];
			const failedRows: number[] = [];
			const stopedRows: number[] = [];

			(responseData.insertErrors as IDataObject[]).forEach((entry) => {
				const invalidRows = (entry.errors as IDataObject[]).filter(
					(error) => error.reason !== 'stopped',
				);
				if (invalidRows.length) {
					const entryIndex = (entry.index as number) + i;
					errors.push(
						`Row ${entryIndex} failed with error: ${invalidRows
							.map((error) => error.message)
							.join(', ')}`,
					);
					failedRows.push(entryIndex);
				} else {
					const entryIndex = (entry.index as number) + i;
					stopedRows.push(entryIndex);
				}
			});

			if (this.continueOnFail()) {
				const executionErrorData = this.helpers.constructExecutionMetaData(
					this.helpers.returnJsonArray({ error: errors.join('\n, ') }),
					{ itemData: { item: i } },
				);
				returnData.push(...executionErrorData);
				continue;
			}

			const failedMessage = `Problem inserting item(s) [${failedRows.join(', ')}]`;
			const stoppedMessage = stopedRows.length
				? `, nothing was inserted item(s) [${stopedRows.join(', ')}]`
				: '';
			throw new NodeOperationError(this.getNode(), `${failedMessage}${stoppedMessage}`, {
				description: errors.join('\n, '),
			});
		}

		const executionData = this.helpers.constructExecutionMetaData(
			wrapData(responseData as IDataObject[]),
			{ itemData },
		);

		returnData.push(...executionData);
	}

	return returnData;
}