// Offline unit tests: they stub IExecuteFunctions and mock the HTTP layer, so
// they run with no network. They cover the review-flagged paths: the entity-id
// guard, JSON-parse errors, the poll-timeout loop, plus source attribution and
// the Return All pagination.

// Make the poll loop instant (pollEvent sleeps between attempts).
jest.mock('n8n-workflow', () => {
	const actual = jest.requireActual('n8n-workflow');
	return { ...actual, sleep: jest.fn().mockResolvedValue(undefined) };
});

import { Mem0 } from '../nodes/Mem0/Mem0.node';

type HttpImpl = (options: any) => Promise<any>;

function makeCtx(
	operation: string,
	params: Record<string, any>,
	http: HttpImpl,
	opts: { continueOnFail?: boolean } = {},
): any {
	const requests: any[] = [];
	const node = { name: 'Mem0', type: '@mem0/n8n-nodes-mem0.mem0', typeVersion: 1 };
	const ctx: any = {
		getInputData: () => [{ json: {} }],
		getCredentials: async () => ({ apiKey: 'm0-test', baseUrl: 'https://api.mem0.ai' }),
		getNodeParameter: (name: string, _i: number, dflt?: any) =>
			name === 'operation' ? operation : name in params ? params[name] : dflt,
		getNode: () => node,
		continueOnFail: () => opts.continueOnFail ?? false,
		helpers: {
			httpRequestWithAuthentication: jest.fn(async function (_cred: string, options: any) {
				requests.push(options);
				return http(options);
			}),
		},
	};
	ctx.requests = requests;
	return ctx;
}

const run = (ctx: any) => Mem0.prototype.execute.call(ctx);

describe('Mem0 node (offline)', () => {
	it('reports a clear error when Add has no entity id', async () => {
		const ctx = makeCtx(
			'add',
			{ 'messages.message': [{ role: 'user', content: 'hi' }], addFields: {}, userId: '' },
			async () => ({}),
			{ continueOnFail: true },
		);
		const out: any = await run(ctx);
		expect(out[0][0].json.error).toMatch(/at least one of User ID/i);
	});

	it('reports a clear error on invalid JSON in Custom Categories', async () => {
		const ctx = makeCtx(
			'add',
			{
				'messages.message': [{ role: 'user', content: 'hi' }],
				addFields: { custom_categories: '{bad' },
				userId: 'u1',
			},
			async () => ({}),
			{ continueOnFail: true },
		);
		const out: any = await run(ctx);
		expect(out[0][0].json.error).toMatch(/Invalid JSON/i);
	});

	it('times out when the add event never resolves', async () => {
		const ctx = makeCtx(
			'add',
			{
				'messages.message': [{ role: 'user', content: 'hi' }],
				addFields: {},
				userId: 'u1',
				waitForCompletion: true,
			},
			async (options) => {
				if (options.url.includes('/v3/memories/add/')) return { event_id: 'e1', status: 'PENDING' };
				if (options.url.includes('/v1/event/')) return { status: 'PENDING' }; // never terminal
				return {};
			},
			{ continueOnFail: true },
		);
		const out: any = await run(ctx);
		expect(out[0][0].json.error).toMatch(/Timed out waiting for memory event/i);
	});

	it('tags every request with source=N8N for first-party attribution', async () => {
		const ctx = makeCtx('search', { query: 'x', userId: 'u1', limit: 5 }, async () => ({ results: [] }));
		await run(ctx);
		expect(ctx.requests[0].qs.source).toBe('N8N');
	});

	it('Return All pages through until a short page', async () => {
		let call = 0;
		const ctx = makeCtx('getAll', { userId: 'u1', returnAll: true, pageSize: 2 }, async () => {
			call++;
			if (call === 1) return { results: [{ id: 'a' }, { id: 'b' }], next: 'page2' };
			return { results: [{ id: 'c' }], next: null }; // short page -> stop
		});
		const out: any = await run(ctx);
		expect(out[0].map((d: any) => d.json.id)).toEqual(['a', 'b', 'c']);
	});
});