import type {
	IExecuteFunctions,
	IHookFunctions,
	ILoadOptionsFunctions,
	IDataObject,
	JsonObject,
	IHttpRequestMethods,
	IRequestOptions,
} from 'n8n-workflow';
import { NodeApiError } from 'n8n-workflow';

export type Context = IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions;

export function FormatDueDatetime(isoString: string): string {
	// Assuming that the problem with incorrect date format was caused by milliseconds
	// Replacing the last 5 characters of ISO-formatted string with just Z char
	return isoString.replace(new RegExp('.000Z$'), 'Z');
}

export async function todoistApiRequest(
	this: Context,
	method: IHttpRequestMethods,
	resource: string,
	body: IDataObject = {},
	qs: IDataObject = {},
): Promise<any> {
	const authentication = this.getNodeParameter('authentication', 0) as string;

	const nodeVersion = this.getNode().typeVersion;
	const endpoint = nodeVersion >= 2.2 ? 'api.todoist.com/api/v1' : 'api.todoist.com/rest/v2';

	const options: IRequestOptions = {
		method,
		qs,
		uri: `https://${endpoint}${resource}`,
		json: true,
	};

	if (Object.keys(body).length !== 0) {
		options.body = body;
	}

	try {
		const credentialType = authentication === 'apiKey' ? 'todoistApi' : 'todoistOAuth2Api';
		return await this.helpers.requestWithAuthentication.call(this, credentialType, options);
	} catch (error) {
		throw new NodeApiError(this.getNode(), error as JsonObject);
	}
}

export async function todoistSyncRequest(
	this: Context,
	body: any = {},
	qs: IDataObject = {},
	endpoint: string = '/sync',
): Promise<any> {
	const authentication = this.getNodeParameter('authentication', 0, 'oAuth2');

	const nodeVersion = this.getNode().typeVersion;
	const baseUrl =
		nodeVersion >= 2.2 ? 'https://api.todoist.com/api/v1' : 'https://api.todoist.com/sync/v9';

	const options: IRequestOptions = {
		headers: {},
		method: 'POST',
		qs,
		uri: `${baseUrl}${endpoint}`,
		json: true,
	};

	if (Object.keys(body as IDataObject).length !== 0) {
		options.body = body;
	}

	try {
		const credentialType = authentication === 'oAuth2' ? 'todoistOAuth2Api' : 'todoistApi';
		return await this.helpers.requestWithAuthentication.call(this, credentialType, options);
	} catch (error) {
		throw new NodeApiError(this.getNode(), error as JsonObject);
	}
}

export async function todoistApiGetAllRequest(
	ctx: Context,
	resource: string,
	qs: IDataObject = {},
	limit?: number,
) {
	const nodeVersion = ctx.getNode().typeVersion;

	if (nodeVersion < 2.2) {
		let response = await todoistApiRequest.call(ctx, 'GET', resource, {}, qs);
		if (limit) response = response.splice(0, limit);
		return response;
	}

	if (limit !== undefined && limit <= 0) return [];

	const results: IDataObject[] = [];
	let nextCursor: string | null = null;

	do {
		const requestQs = { ...qs };
		if (nextCursor) requestQs.cursor = nextCursor;

		if (limit !== undefined && limit > 0) {
			const remainingItems = limit - results.length;
			if (remainingItems <= 0) break;

			requestQs.limit = Math.min(remainingItems, 200);
		}

		const response = await todoistApiRequest.call(ctx, 'GET', resource, {}, requestQs);

		if (response?.results && Array.isArray(response.results)) {
			if (limit !== undefined && limit > 0) {
				const remainingItems = limit - results.length;
				const itemsToAdd = response.results.slice(0, remainingItems);
				results.push(...itemsToAdd);

				if (results.length >= limit) break;
			} else {
				results.push(...response.results);
			}

			nextCursor = response.next_cursor ?? null;
		} else {
			break;
		}
	} while (nextCursor !== null);

	return results;
}