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

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

import {
	URL,
} from 'url';

import {
	awsApiRequestSOAP,
} from '../GenericFunctions';

import {
	pascalCase,
} from 'change-case';

export class AwsSqs implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'AWS SQS',
		name: 'awsSqs',
		icon: 'file:sqs.svg',
		group: ['output'],
		version: 1,
		subtitle: `={{$parameter["operation"]}}`,
		description: 'Sends messages to AWS SQS',
		defaults: {
			name: 'AWS SQS',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'aws',
				required: true,
			},
		],
		properties: [
			{
				displayName: 'Operation',
				name: 'operation',
				type: 'options',
				noDataExpression: true,
				options: [
					{
						name: 'Send Message',
						value: 'sendMessage',
						description: 'Send a message to a queue',
					},
				],
				default: 'sendMessage',
			},
			{
				displayName: 'Queue Name or ID',
				name: 'queue',
				type: 'options',
				typeOptions: {
					loadOptionsMethod: 'getQueues',
				},
				displayOptions: {
					show: {
						operation: [
							'sendMessage',
						],
					},
				},
				options: [],
				default: '',
				required: true,
				description: 'Queue to send a message to. Choose from the list, or specify an ID using an <a href="https://docs.n8n.io/nodes/expressions.html#expressions">expression</a>.',
			},
			{
				displayName: 'Queue Type',
				name: 'queueType',
				type: 'options',
				options: [
					{
						name: 'FIFO',
						value: 'fifo',
						description: 'FIFO SQS queue',
					},
					{
						name: 'Standard',
						value: 'standard',
						description: 'Standard SQS queue',
					},
				],
				default: 'standard',
			},
			{
				displayName: 'Send Input Data',
				name: 'sendInputData',
				type: 'boolean',
				default: true,
				description: 'Send the data the node receives as JSON to SQS',
			},
			{
				displayName: 'Message',
				name: 'message',
				type: 'string',
				displayOptions: {
					show: {
						operation: [
							'sendMessage',
						],
						sendInputData: [
							false,
						],
					},
				},
				required: true,
				typeOptions: {
					alwaysOpenEditWindow: true,
				},
				default: '',
				description: 'Message to send to the queue',
			},
			{
				displayName: 'Message Group ID',
				name: 'messageGroupId',
				type: 'string',
				default: '',
				description: 'Tag that specifies that a message belongs to a specific message group. Applies only to FIFO (first-in-first-out) queues.',
				displayOptions: {
					show: {
						queueType: [
							'fifo',
						],
					},
				},
				required: true,
			},
			{
				displayName: 'Options',
				name: 'options',
				type: 'collection',
				displayOptions: {
					show: {
						operation: [
							'sendMessage',
						],
					},
				},
				default: {},
				placeholder: 'Add Option',
				options: [
					{
						displayName: 'Delay Seconds',
						name: 'delaySeconds',
						type: 'number',
						displayOptions: {
							show: {
								'/queueType': [
									'standard',
								],
							},
						},
						description: 'How long, in seconds, to delay a message for',
						default: 0,
						typeOptions: {
							minValue: 0,
							maxValue: 900,
						},
					},
					{
						displayName: 'Message Attributes',
						name: 'messageAttributes',
						placeholder: 'Add Attribute',
						type: 'fixedCollection',
						typeOptions: {
							multipleValues: true,
						},
						description: 'Attributes to set',
						default: {},
						options: [
							{
								name: 'binary',
								displayName: 'Binary',
								values: [
									{
										displayName: 'Name',
										name: 'name',
										type: 'string',
										default: '',
										description: 'Name of the attribute',
									},
									{
										displayName: 'Property Name',
										name: 'dataPropertyName',
										type: 'string',
										default: 'data',
										description: 'Name of the binary property which contains the data for the message attribute',
									},
								],
							},
							{
								name: 'number',
								displayName: 'Number',
								values: [
									{
										displayName: 'Name',
										name: 'name',
										type: 'string',
										default: '',
										description: 'Name of the attribute',
									},
									{
										displayName: 'Value',
										name: 'value',
										type: 'number',
										default: 0,
										description: 'Number value of the attribute',
									},
								],
							},
							{
								name: 'string',
								displayName: 'String',
								values: [
									{
										displayName: 'Name',
										name: 'name',
										type: 'string',
										default: '',
										description: 'Name of the attribute',
									},
									{
										displayName: 'Value',
										name: 'value',
										type: 'string',
										default: '',
										description: 'String value of attribute',
									},
								],
							},
						],
					},
					{
						displayName: 'Message Deduplication ID',
						name: 'messageDeduplicationId',
						type: 'string',
						default: '',
						description: 'Token used for deduplication of sent messages. Applies only to FIFO (first-in-first-out) queues.',
						displayOptions: {
							show: {
								'/queueType': [
									'fifo',
								],
							},
						},
					},
				],
			},
		],
	};

	methods = {
		loadOptions: {
			// Get all the available queues to display them to user so that it can be selected easily
			async getQueues(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const params = [
					'Version=2012-11-05',
					`Action=ListQueues`,
				];

				let data;
				try {
					// loads first 1000 queues from SQS
					data = await awsApiRequestSOAP.call(this, 'sqs', 'GET', `?${params.join('&')}`);
				} catch (error) {
					throw new NodeApiError(this.getNode(), error);
				}

				let queues = data.ListQueuesResponse.ListQueuesResult.QueueUrl;
				if (!queues) {
					return [];
				}

				if (!Array.isArray(queues)) {
					// If user has only a single queue no array get returned so we make
					// one manually to be able to process everything identically
					queues = [queues];
				}

				return queues.map((queueUrl: string) => {
					const urlParts = queueUrl.split('/');
					const name = urlParts[urlParts.length - 1];

					return {
						name,
						value: queueUrl,
					};
				});
			},
		},
	};


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

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

		for (let i = 0; i < items.length; i++) {
			try {
				const queueUrl = this.getNodeParameter('queue', i) as string;
				const queuePath = new URL(queueUrl).pathname;

				const params = [
					'Version=2012-11-05',
					`Action=${pascalCase(operation)}`,
				];

				const options = this.getNodeParameter('options', i, {}) as IDataObject;
				const sendInputData = this.getNodeParameter('sendInputData', i) as boolean;

				const message = sendInputData ? JSON.stringify(items[i].json) : this.getNodeParameter('message', i) as string;
				params.push(`MessageBody=${message}`);

				if (options.delaySeconds) {
					params.push(`DelaySeconds=${options.delaySeconds}`);
				}

				const queueType = this.getNodeParameter('queueType', i, {}) as string;
				if (queueType === 'fifo') {
					const messageDeduplicationId = this.getNodeParameter('options.messageDeduplicationId', i, '') as string;
					if (messageDeduplicationId) {
						params.push(`MessageDeduplicationId=${messageDeduplicationId}`);
					}

					const messageGroupId = this.getNodeParameter('messageGroupId', i) as string;
					if (messageGroupId) {
						params.push(`MessageGroupId=${messageGroupId}`);
					}
				}

				let attributeCount = 0;
				// Add string values
				(this.getNodeParameter('options.messageAttributes.string', i, []) as INodeParameters[]).forEach((attribute) => {
					attributeCount++;
					params.push(`MessageAttribute.${attributeCount}.Name=${attribute.name}`);
					params.push(`MessageAttribute.${attributeCount}.Value.StringValue=${attribute.value}`);
					params.push(`MessageAttribute.${attributeCount}.Value.DataType=String`);
				});

				// Add binary values
				(this.getNodeParameter('options.messageAttributes.binary', i, []) as INodeParameters[]).forEach((attribute) => {
					attributeCount++;
					const dataPropertyName = attribute.dataPropertyName as string;
					const item = items[i];

					if (item.binary === undefined) {
						throw new NodeOperationError(this.getNode(), 'No binary data set. So message attribute cannot be added!');
					}

					if (item.binary[dataPropertyName] === undefined) {
						throw new NodeOperationError(this.getNode(), `The binary property "${dataPropertyName}" does not exist. So message attribute cannot be added!`);
					}

					const binaryData = item.binary[dataPropertyName].data;

					params.push(`MessageAttribute.${attributeCount}.Name=${attribute.name}`);
					params.push(`MessageAttribute.${attributeCount}.Value.BinaryValue=${binaryData}`);
					params.push(`MessageAttribute.${attributeCount}.Value.DataType=Binary`);
				});

				// Add number values
				(this.getNodeParameter('options.messageAttributes.number', i, []) as INodeParameters[]).forEach((attribute) => {
					attributeCount++;
					params.push(`MessageAttribute.${attributeCount}.Name=${attribute.name}`);
					params.push(`MessageAttribute.${attributeCount}.Value.StringValue=${attribute.value}`);
					params.push(`MessageAttribute.${attributeCount}.Value.DataType=Number`);
				});

				let responseData;
				try {
					responseData = await awsApiRequestSOAP.call(this, 'sqs', 'GET', `${queuePath}?${params.join('&')}`);
				} catch (error) {
					throw new NodeApiError(this.getNode(), error);
				}

				const result = responseData.SendMessageResponse.SendMessageResult;
				returnData.push(result as IDataObject);
			} catch (error) {
				if (this.continueOnFail()) {
					returnData.push({ error: error.description });
					continue;
				}
				throw error;
			}
		}

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