/* eslint-disable @typescript-eslint/no-unsafe-call */
/* eslint-disable @typescript-eslint/no-unsafe-member-access */
import TelemetryClient = require('@rudderstack/rudder-sdk-node');
import { IDataObject, LoggerProxy } from 'n8n-workflow';
import config = require('../../config');
import { getLogger } from '../Logger';

interface IExecutionCountsBufferItem {
	manual_success_count: number;
	manual_error_count: number;
	prod_success_count: number;
	prod_error_count: number;
}

interface IExecutionCountsBuffer {
	[workflowId: string]: IExecutionCountsBufferItem;
}

export class Telemetry {
	private client?: TelemetryClient;

	private instanceId: string;

	private pulseIntervalReference: NodeJS.Timeout;

	private executionCountsBuffer: IExecutionCountsBuffer = {};

	constructor(instanceId: string) {
		this.instanceId = instanceId;

		const enabled = config.get('diagnostics.enabled') as boolean;
		if (enabled) {
			const conf = config.get('diagnostics.config.backend') as string;
			const [key, url] = conf.split(';');

			if (!key || !url) {
				const logger = getLogger();
				LoggerProxy.init(logger);
				logger.warn('Diagnostics backend config is invalid');
				return;
			}

			this.client = new TelemetryClient(key, url);

			this.pulseIntervalReference = setInterval(async () => {
				void this.pulse();
			}, 6 * 60 * 60 * 1000); // every 6 hours
		}
	}

	private async pulse(): Promise<unknown> {
		if (!this.client) {
			return Promise.resolve();
		}

		const allPromises = Object.keys(this.executionCountsBuffer).map(async (workflowId) => {
			const promise = this.track('Workflow execution count', {
				workflow_id: workflowId,
				...this.executionCountsBuffer[workflowId],
			});
			this.executionCountsBuffer[workflowId].manual_error_count = 0;
			this.executionCountsBuffer[workflowId].manual_success_count = 0;
			this.executionCountsBuffer[workflowId].prod_error_count = 0;
			this.executionCountsBuffer[workflowId].prod_success_count = 0;

			return promise;
		});

		allPromises.push(this.track('pulse'));
		return Promise.all(allPromises);
	}

	async trackWorkflowExecution(properties: IDataObject): Promise<void> {
		if (this.client) {
			const workflowId = properties.workflow_id as string;
			this.executionCountsBuffer[workflowId] = this.executionCountsBuffer[workflowId] ?? {
				manual_error_count: 0,
				manual_success_count: 0,
				prod_error_count: 0,
				prod_success_count: 0,
			};

			if (
				properties.success === false &&
				properties.error_node_type &&
				(properties.error_node_type as string).startsWith('n8n-nodes-base')
			) {
				// errored exec
				void this.track('Workflow execution errored', properties);

				if (properties.is_manual) {
					this.executionCountsBuffer[workflowId].manual_error_count++;
				} else {
					this.executionCountsBuffer[workflowId].prod_error_count++;
				}
			} else if (properties.is_manual) {
				this.executionCountsBuffer[workflowId].manual_success_count++;
			} else {
				this.executionCountsBuffer[workflowId].prod_success_count++;
			}
		}
	}

	async trackN8nStop(): Promise<void> {
		clearInterval(this.pulseIntervalReference);
		void this.track('User instance stopped');
		return new Promise<void>((resolve) => {
			if (this.client) {
				this.client.flush(resolve);
			} else {
				resolve();
			}
		});
	}

	async identify(traits?: IDataObject): Promise<void> {
		return new Promise<void>((resolve) => {
			if (this.client) {
				this.client.identify(
					{
						userId: this.instanceId,
						traits: {
							...traits,
							instanceId: this.instanceId,
						},
					},
					resolve,
				);
			} else {
				resolve();
			}
		});
	}

	async track(eventName: string, properties?: IDataObject): Promise<void> {
		return new Promise<void>((resolve) => {
			if (this.client) {
				this.client.track(
					{
						userId: this.instanceId,
						event: eventName,
						properties,
					},
					resolve,
				);
			} else {
				resolve();
			}
		});
	}
}