import type {
	ICredentialDataDecryptedObject,
	IDataObject,
	IHookFunctions,
	IWebhookFunctions,
	INodeType,
	INodeTypeDescription,
	IWebhookResponseData,
} from 'n8n-workflow';
import { NodeConnectionTypes, NodeOperationError } from 'n8n-workflow';

import {
	allEvents,
	eventExists,
	getWebhookId,
	getWebhookEndpoint,
	jiraSoftwareCloudApiRequest,
	jiraSoftwareCloudApiRequestAllItems,
	refreshJiraWebhook,
	OAUTH2_WEBHOOK_REFRESH_INTERVAL_MS,
	OAUTH2_WEBHOOK_EXPIRY_BUFFER_MS,
	OAUTH2_SUPPORTED_WEBHOOK_EVENTS,
} from './GenericFunctions';
import type { JiraDynamicWebhook, JiraProject, JiraWebhook } from './types';

export class JiraTrigger implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'Jira Trigger',
		name: 'jiraTrigger',
		icon: 'file:jira.svg',
		group: ['trigger'],
		version: [1, 1.1],
		description: 'Starts the workflow when Jira events occur',
		defaults: {
			name: 'Jira Trigger',
		},
		inputs: [],
		outputs: [NodeConnectionTypes.Main],
		credentials: [
			{
				displayName: 'Credentials to Connect to Jira',
				name: 'jiraSoftwareCloudApi',
				required: true,
				displayOptions: {
					show: {
						jiraVersion: ['cloud'],
					},
				},
			},
			{
				displayName: 'Credentials to Connect to Jira',
				name: 'jiraSoftwareServerApi',
				required: true,
				displayOptions: {
					show: {
						jiraVersion: ['server'],
					},
				},
			},
			{
				displayName: 'Credentials to Connect to Jira',
				name: 'jiraSoftwareServerPatApi',
				required: true,
				displayOptions: {
					show: {
						jiraVersion: ['serverPat'],
					},
				},
			},
			{
				displayName: 'Credentials to Connect to Jira',
				name: 'jiraSoftwareCloudOAuth2Api',
				required: true,
				displayOptions: {
					show: {
						jiraVersion: ['cloudOAuth2'],
					},
				},
			},
			{
				// eslint-disable-next-line n8n-nodes-base/node-class-description-credentials-name-unsuffixed
				name: 'httpQueryAuth',
				displayName: 'Credentials to Authenticate Webhook',
				displayOptions: {
					show: {
						authenticateWebhook: [true],
					},
				},
			},
			{
				name: 'httpQueryAuth',
				displayName: 'Credentials to Authenticate Webhook',
				displayOptions: {
					show: {
						incomingAuthentication: ['queryAuth'],
					},
				},
			},
		],
		webhooks: [
			{
				name: 'default',
				httpMethod: 'POST',
				responseMode: 'onReceived',
				path: 'webhook',
			},
		],
		properties: [
			{
				displayName: 'Jira Version',
				name: 'jiraVersion',
				type: 'options',
				options: [
					{
						name: 'Cloud',
						value: 'cloud',
					},
					{
						name: 'Cloud (OAuth2)',
						value: 'cloudOAuth2',
					},
					{
						name: 'Server (Self Hosted)',
						value: 'server',
					},
					{
						name: 'Server (Pat) (Self Hosted)',
						value: 'serverPat',
					},
				],
				default: 'cloud',
			},
			{
				displayName: 'Authenticate Incoming Webhook',
				name: 'authenticateWebhook',
				type: 'boolean',
				default: false,
				description:
					'Whether authentication should be activated for the incoming webhooks (makes it more secure)',
				displayOptions: {
					show: {
						'@version': [{ _cnd: { gte: 1.1 } }],
					},
				},
			},
			{
				displayName: 'Authenticate Webhook With',
				name: 'incomingAuthentication',
				type: 'options',
				options: [
					{
						name: 'Query Auth',
						value: 'queryAuth',
					},
					{
						name: 'None',
						value: 'none',
					},
				],
				default: 'none',
				description: 'If authentication should be activated for the webhook (makes it more secure)',
				displayOptions: {
					show: {
						'@version': [1],
					},
				},
			},
			{
				displayName: 'Events',
				name: 'events',
				type: 'multiOptions',
				displayOptions: {
					hide: {
						jiraVersion: ['cloudOAuth2'],
					},
				},
				options: [
					{
						name: '*',
						value: '*',
					},
					{
						name: 'Board Configuration Changed',
						value: 'board_configuration_changed',
					},
					{
						name: 'Board Created',
						value: 'board_created',
					},
					{
						name: 'Board Deleted',
						value: 'board_deleted',
					},
					{
						name: 'Board Updated',
						value: 'board_updated',
					},
					{
						name: 'Comment Created',
						value: 'comment_created',
					},
					{
						name: 'Comment Deleted',
						value: 'comment_deleted',
					},
					{
						name: 'Comment Updated',
						value: 'comment_updated',
					},
					{
						name: 'Issue Created',
						value: 'jira:issue_created',
					},
					{
						name: 'Issue Deleted',
						value: 'jira:issue_deleted',
					},
					{
						name: 'Issue Link Created',
						value: 'issuelink_created',
					},
					{
						name: 'Issue Link Deleted',
						value: 'issuelink_deleted',
					},
					{
						name: 'Issue Updated',
						value: 'jira:issue_updated',
					},
					{
						name: 'Option Attachments Changed',
						value: 'option_attachments_changed',
					},
					{
						name: 'Option Issue Links Changed',
						value: 'option_issuelinks_changed',
					},
					{
						name: 'Option Subtasks Changed',
						value: 'option_subtasks_changed',
					},
					{
						name: 'Option Timetracking Changed',
						value: 'option_timetracking_changed',
					},
					{
						name: 'Option Unassigned Issues Changed',
						value: 'option_unassigned_issues_changed',
					},
					{
						name: 'Option Voting Changed',
						value: 'option_voting_changed',
					},
					{
						name: 'Option Watching Changed',
						value: 'option_watching_changed',
					},
					{
						name: 'Project Created',
						value: 'project_created',
					},
					{
						name: 'Project Deleted',
						value: 'project_deleted',
					},
					{
						name: 'Project Updated',
						value: 'project_updated',
					},
					{
						name: 'Sprint Closed',
						value: 'sprint_closed',
					},
					{
						name: 'Sprint Created',
						value: 'sprint_created',
					},
					{
						name: 'Sprint Deleted',
						value: 'sprint_deleted',
					},
					{
						name: 'Sprint Started',
						value: 'sprint_started',
					},
					{
						name: 'Sprint Updated',
						value: 'sprint_updated',
					},
					{
						name: 'User Created',
						value: 'user_created',
					},
					{
						name: 'User Deleted',
						value: 'user_deleted',
					},
					{
						name: 'User Updated',
						value: 'user_updated',
					},
					{
						name: 'Version Created',
						value: 'jira:version_created',
					},
					{
						name: 'Version Deleted',
						value: 'jira:version_deleted',
					},
					{
						name: 'Version Moved',
						value: 'jira:version_moved',
					},
					{
						name: 'Version Released',
						value: 'jira:version_released',
					},
					{
						name: 'Version Unreleased',
						value: 'jira:version_unreleased',
					},
					{
						name: 'Version Updated',
						value: 'jira:version_updated',
					},
					{
						name: 'Worklog Created',
						value: 'worklog_created',
					},
					{
						name: 'Worklog Deleted',
						value: 'worklog_deleted',
					},
					{
						name: 'Worklog Updated',
						value: 'worklog_updated',
					},
				],
				required: true,
				default: [],
				description: 'The events to listen to',
			},
			{
				displayName: 'Events',
				name: 'events',
				type: 'multiOptions',
				displayOptions: {
					show: {
						jiraVersion: ['cloudOAuth2'],
					},
				},
				options: [
					{
						name: '*',
						value: '*',
					},
					{
						name: 'Comment Created',
						value: 'comment_created',
					},
					{
						name: 'Comment Deleted',
						value: 'comment_deleted',
					},
					{
						name: 'Comment Updated',
						value: 'comment_updated',
					},
					{
						name: 'Issue Created',
						value: 'jira:issue_created',
					},
					{
						name: 'Issue Deleted',
						value: 'jira:issue_deleted',
					},
					{
						name: 'Issue Property Deleted',
						value: 'issue_property_deleted',
					},
					{
						name: 'Issue Property Set',
						value: 'issue_property_set',
					},
					{
						name: 'Issue Updated',
						value: 'jira:issue_updated',
					},
					{
						name: 'Sprint Closed',
						value: 'sprint_closed',
					},
					{
						name: 'Sprint Created',
						value: 'sprint_created',
					},
					{
						name: 'Sprint Deleted',
						value: 'sprint_deleted',
					},
					{
						name: 'Sprint Started',
						value: 'sprint_started',
					},
					{
						name: 'Sprint Updated',
						value: 'sprint_updated',
					},
					{
						name: 'Version Created',
						value: 'jira:version_created',
					},
					{
						name: 'Version Deleted',
						value: 'jira:version_deleted',
					},
					{
						name: 'Version Merged',
						value: 'jira:version_merged',
					},
					{
						name: 'Version Moved',
						value: 'jira:version_moved',
					},
					{
						name: 'Version Released',
						value: 'jira:version_released',
					},
					{
						name: 'Version Unreleased',
						value: 'jira:version_unreleased',
					},
					{
						name: 'Version Updated',
						value: 'jira:version_updated',
					},
				],
				required: true,
				default: [],
				description: 'The events to listen to',
			},
			{
				displayName: 'Additional Fields',
				name: 'additionalFields',
				type: 'collection',
				placeholder: 'Add Field',
				default: {},
				options: [
					{
						displayName: 'Exclude Body',
						name: 'excludeBody',
						type: 'boolean',
						default: false,
						description:
							'Whether a request with empty body will be sent to the URL. Leave unchecked if you want to receive JSON.',
						displayOptions: {
							hide: {
								'/jiraVersion': ['cloudOAuth2'],
							},
						},
					},
					{
						displayName: 'Filter',
						name: 'filter',
						type: 'string',
						default: '',
						placeholder: 'Project = JRA AND resolution = Fixed',
						description:
							'A JQL query to limit which issues trigger events. For Cloud OAuth2, leave blank to automatically monitor all accessible projects.',
					},
					{
						displayName: 'Include Fields',
						name: 'includeFields',
						type: 'multiOptions',
						displayOptions: {
							hide: {
								'/jiraVersion': ['cloudOAuth2'],
							},
						},
						options: [
							{
								name: 'Attachment ID',
								value: 'attachment.id',
							},
							{
								name: 'Board ID',
								value: 'board.id',
							},
							{
								name: 'Comment ID',
								value: 'comment.id',
							},
							{
								name: 'Issue ID',
								value: 'issue.id',
							},
							{
								name: 'Merge Version ID',
								value: 'mergeVersion.id',
							},
							{
								name: 'Modified User Account ID',
								value: 'modifiedUser.accountId',
							},
							{
								name: 'Modified User Key',
								value: 'modifiedUser.key',
							},
							{
								name: 'Modified User Name',
								value: 'modifiedUser.name',
							},
							{
								name: 'Project ID',
								value: 'project.id',
							},
							{
								name: 'Project Key',
								value: 'project.key',
							},
							{
								name: 'Propery Key',
								value: 'property.key',
							},
							{
								name: 'Sprint ID',
								value: 'sprint.id',
							},
							{
								name: 'Version ID',
								value: 'version.id',
							},
							{
								name: 'Worklog ID',
								value: 'worklog.id',
							},
						],
						default: [],
					},
				],
			},
		],
	};

	webhookMethods = {
		default: {
			async checkExists(this: IHookFunctions): Promise<boolean> {
				const webhookUrl = this.getNodeWebhookUrl('default') as string;

				const webhookData = this.getWorkflowStaticData('node');

				const events = this.getNodeParameter('events') as string[];
				const jiraVersion = this.getNodeParameter('jiraVersion', 0) as string;

				const endpoint = await getWebhookEndpoint.call(this);
				webhookData.endpoint = endpoint;

				if (jiraVersion === 'cloudOAuth2') {
					const response = await jiraSoftwareCloudApiRequest.call(this, endpoint, 'GET', {});
					const webhooks = (response.values ?? []) as JiraDynamicWebhook[];

					const effectiveEvents = events.includes('*')
						? [...OAUTH2_SUPPORTED_WEBHOOK_EVENTS]
						: events;

					for (const webhook of webhooks) {
						if (
							webhook.url === webhookUrl &&
							(!webhook.events || eventExists(effectiveEvents, webhook.events))
						) {
							webhookData.webhookId = webhook.id.toString();

							// Refresh if within the expiry buffer window
							if (webhook.expirationDate) {
								const expiresAt = new Date(webhook.expirationDate).getTime();
								if (expiresAt - Date.now() < OAUTH2_WEBHOOK_EXPIRY_BUFFER_MS) {
									await refreshJiraWebhook.call(this, endpoint, webhook.id.toString());
									webhookData.lastRefreshed = Date.now();
								}
							}

							return true;
						}
					}

					return false;
				}

				const webhooks: JiraWebhook[] = await jiraSoftwareCloudApiRequest.call(
					this,
					endpoint,
					'GET',
					{},
				);

				const effectiveEvents = events.includes('*') ? allEvents : events;
				for (const webhook of webhooks) {
					if (webhook.url === webhookUrl && eventExists(effectiveEvents, webhook.events)) {
						webhookData.webhookId = getWebhookId(webhook);
						return true;
					}
				}

				return false;
			},
			async create(this: IHookFunctions): Promise<boolean> {
				const nodeVersion = this.getNode().typeVersion;
				const webhookUrl = this.getNodeWebhookUrl('default') as string;
				let events = this.getNodeParameter('events', []) as string[];
				const additionalFields = this.getNodeParameter('additionalFields') as IDataObject;
				const webhookData = this.getWorkflowStaticData('node');
				const endpoint = webhookData.endpoint as string;
				const jiraVersion = this.getNodeParameter('jiraVersion', 0) as string;

				let authenticateWebhook = false;

				if (nodeVersion === 1) {
					const incomingAuthentication = this.getNodeParameter('incomingAuthentication') as string;

					if (incomingAuthentication === 'queryAuth') {
						authenticateWebhook = true;
					}
				} else {
					authenticateWebhook = this.getNodeParameter('authenticateWebhook') as boolean;
				}

				// Build the callback URL, appending auth query params if needed
				let webhookCallbackUrl = webhookUrl;
				const parameters: Record<string, string> = {};

				if (authenticateWebhook) {
					let httpQueryAuth;
					try {
						httpQueryAuth = await this.getCredentials('httpQueryAuth');
					} catch (e) {
						throw new NodeOperationError(
							this.getNode(),
							new Error('Could not retrieve HTTP Query Auth credentials', { cause: e }),
						);
					}
					if (!httpQueryAuth.name && !httpQueryAuth.value) {
						throw new NodeOperationError(this.getNode(), 'HTTP Query Auth credentials are empty');
					}
					parameters[encodeURIComponent(httpQueryAuth.name as string)] = Buffer.from(
						httpQueryAuth.value as string,
					).toString('base64');
				}

				// includeFields URL templates are only supported by the classic webhook API
				if (jiraVersion !== 'cloudOAuth2' && additionalFields.includeFields) {
					for (const field of additionalFields.includeFields as string[]) {
						// eslint-disable-next-line n8n-local-rules/no-interpolation-in-regular-string
						parameters[field] = '${' + field + '}';
					}
				}

				if (Object.keys(parameters as IDataObject).length) {
					const params = new URLSearchParams(parameters).toString();
					webhookCallbackUrl = `${webhookCallbackUrl}?${decodeURIComponent(params)}`;
				}

				if (jiraVersion === 'cloudOAuth2') {
					// The Dynamic Webhooks API only supports a subset of event types — see OAUTH2_SUPPORTED_WEBHOOK_EVENTS.
					const filteredEvents = events.includes('*')
						? [...OAUTH2_SUPPORTED_WEBHOOK_EVENTS]
						: events.filter((e) => OAUTH2_SUPPORTED_WEBHOOK_EVENTS.has(e));

					if (filteredEvents.length === 0) {
						throw new NodeOperationError(
							this.getNode(),
							'None of the selected events are supported with Jira Cloud OAuth2. Select at least one of: issues, comments, versions, or sprints.',
						);
					}

					let jqlFilter = additionalFields.filter as string;
					if (!jqlFilter) {
						const projects = (await jiraSoftwareCloudApiRequestAllItems.call(
							this,
							'values',
							'/api/2/project/search',
							'GET',
						)) as JiraProject[];

						if (!projects.length) {
							throw new NodeOperationError(
								this.getNode(),
								'No accessible Jira projects found for this OAuth2 user. The webhook cannot be registered without at least one accessible project.',
							);
						}

						jqlFilter = `project in (${projects.map((p) => p.key).join(', ')})`;
					}

					// Dynamic Webhooks API — jqlFilter is required and must be a valid non-empty JQL query.
					const webhookDef: IDataObject = {
						events: filteredEvents,
						jqlFilter,
					};

					const responseData = await jiraSoftwareCloudApiRequest.call(this, endpoint, 'POST', {
						url: webhookCallbackUrl,
						webhooks: [webhookDef],
					});

					const result = responseData.webhookRegistrationResult?.[0] as
						| { createdWebhookId?: number; errors?: string[] }
						| undefined;

					if (!result?.createdWebhookId) {
						const errorDetail = result?.errors?.join(', ') ?? 'no webhook ID returned';
						throw new NodeOperationError(
							this.getNode(),
							`Failed to register webhook: ${errorDetail}`,
						);
					}

					webhookData.webhookId = result.createdWebhookId.toString();
					webhookData.lastRefreshed = Date.now();
				} else {
					if (events.includes('*')) {
						events = allEvents;
					}

					const body = {
						name: `n8n-webhook:${webhookUrl}`,
						url: webhookCallbackUrl,
						events,
						filters: {},
						excludeBody: false,
					};

					if (additionalFields.filter) {
						body.filters = {
							'issue-related-events-section': additionalFields.filter,
						};
					}

					if (additionalFields.excludeBody) {
						body.excludeBody = additionalFields.excludeBody as boolean;
					}

					const responseData: JiraWebhook = await jiraSoftwareCloudApiRequest.call(
						this,
						endpoint,
						'POST',
						body,
					);

					webhookData.webhookId = getWebhookId(responseData);
				}

				return true;
			},
			async delete(this: IHookFunctions): Promise<boolean> {
				const webhookData = this.getWorkflowStaticData('node');
				const jiraVersion = this.getNodeParameter('jiraVersion', 0) as string;

				if (webhookData.webhookId !== undefined) {
					const baseUrl = webhookData.endpoint as string;
					const webhookId = webhookData.webhookId as string;

					try {
						if (jiraVersion === 'cloudOAuth2') {
							// Dynamic Webhooks API deletes by body, not path parameter
							await jiraSoftwareCloudApiRequest.call(this, baseUrl, 'DELETE', {
								webhookIds: [parseInt(webhookId, 10)],
							});
						} else {
							const endpoint = `${baseUrl}/${webhookId}`;
							await jiraSoftwareCloudApiRequest.call(this, endpoint, 'DELETE', {});
						}
					} catch (error) {
						return false;
					}
					// Remove from the static workflow data so that it is clear
					// that no webhooks are registered anymore
					delete webhookData.webhookId;
				}

				return true;
			},
		},
	};

	async webhook(this: IWebhookFunctions): Promise<IWebhookResponseData> {
		const jiraVersion = this.getNodeParameter('jiraVersion', 0) as string;

		if (jiraVersion === 'cloudOAuth2') {
			const webhookData = this.getWorkflowStaticData('node');
			const lastRefreshed = webhookData.lastRefreshed as number | undefined;

			if (!lastRefreshed || Date.now() - lastRefreshed > OAUTH2_WEBHOOK_REFRESH_INTERVAL_MS) {
				const webhookId = webhookData.webhookId as string | undefined;
				const endpoint = webhookData.endpoint as string | undefined;

				if (webhookId && endpoint) {
					try {
						await refreshJiraWebhook.call(this, endpoint, webhookId);
						webhookData.lastRefreshed = Date.now();
					} catch {
						// Non-fatal: the webhook keeps working until Atlassian expires it
					}
				}
			}
		}

		const nodeVersion = this.getNode().typeVersion;
		const bodyData = this.getBodyData();
		const queryData = this.getQueryData() as IDataObject;
		const response = this.getResponseObject();

		let authenticateWebhook = false;

		if (nodeVersion === 1) {
			const incomingAuthentication = this.getNodeParameter('incomingAuthentication') as string;

			if (incomingAuthentication === 'queryAuth') {
				authenticateWebhook = true;
			}
		} else {
			authenticateWebhook = this.getNodeParameter('authenticateWebhook') as boolean;
		}

		if (authenticateWebhook) {
			let httpQueryAuth: ICredentialDataDecryptedObject | undefined;

			try {
				httpQueryAuth = await this.getCredentials<ICredentialDataDecryptedObject>('httpQueryAuth');
			} catch (error) {}

			if (httpQueryAuth === undefined || !httpQueryAuth.name || !httpQueryAuth.value) {
				response
					.status(403)
					.json({ message: 'Auth settings are not valid, some data are missing' });

				return {
					noWebhookResponse: true,
				};
			}

			const paramName = httpQueryAuth.name as string;
			const paramValue = Buffer.from(httpQueryAuth.value as string).toString('base64');

			if (!queryData.hasOwnProperty(paramName) || queryData[paramName] !== paramValue) {
				response.status(403).json({ message: 'Provided authentication data is not valid' });

				return {
					noWebhookResponse: true,
				};
			}

			delete queryData[paramName];

			Object.assign(bodyData, queryData);
		} else {
			Object.assign(bodyData, queryData);
		}

		return {
			workflowData: [this.helpers.returnJsonArray(bodyData)],
		};
	}
}