// The module under test caches its OAuth token at module scope (see
// salesforce.service.ts's `cachedToken`), so every test resets the module
// registry for a clean cache. That also invalidates any jest.mock() factory
// instance captured before the reset, so every mocked dependency (axios,
// Feedback.db, the logger) is re-required fresh after each reset rather
// than referenced from a top-level import.

jest.mock('axios');
jest.mock('../../src/models/feedback/Feedback.db', () => ({
	NachklangFeedbackDB: {getConnection: jest.fn()}
}));
jest.mock('../../src/middleware/logger', () => ({
	__esModule: true,
	default: {info: jest.fn(), error: jest.fn()}
}));

const SIGNUP_ROW = {
	signup_id: 7,
	first_name: 'Erika',
	last_name: 'Mustermann',
	email: 'erika@example.com',
	event_name: 'Sommerkonzert 2026'
};

const makeConn = (rows: any[]) => ({
	query: jest.fn().mockResolvedValue(rows),
	end: jest.fn().mockResolvedValue(undefined)
});

// Re-requires every mocked dependency fresh (see the note above) and
// returns the live references plus the service under test.
const freshImports = () => {
	const axios = require('axios');
	const {NachklangFeedbackDB} = require('../../src/models/feedback/Feedback.db');
	const logger = require('../../src/middleware/logger').default;
	const {syncNewsletterSignup} = require('../../src/models/feedback/integrations/salesforce.service');
	return {axios, mockGetConnection: NachklangFeedbackDB.getConnection as jest.Mock, logger, syncNewsletterSignup};
};

const ORIGINAL_ENV = {...process.env};

describe('syncNewsletterSignup - disabled mode', () => {
	beforeEach(() => {
		jest.resetModules();
		process.env = {...ORIGINAL_ENV, SALESFORCE_ENABLED: 'false'};
	});

	it('logs the payload it would send and does not touch the network or write to the DB', async () => {
		const {axios, mockGetConnection, logger, syncNewsletterSignup} = freshImports();
		const conn = makeConn([SIGNUP_ROW]);
		mockGetConnection.mockResolvedValue(conn);

		await syncNewsletterSignup(7);

		expect(logger.info).toHaveBeenCalledWith(
			expect.stringContaining('would have sent'),
			expect.objectContaining({
				signupId: 7,
				payload: {firstName: 'Erika', lastName: 'Mustermann', email: 'erika@example.com', eventName: 'Sommerkonzert 2026'}
			})
		);
		expect(axios.post).not.toHaveBeenCalled();
		// One read connection only - no UPDATE issued, since the row's
		// sync_status is already 'SKIPPED' from the insert.
		expect(mockGetConnection).toHaveBeenCalledTimes(1);
	});

	it('logs and returns without calling the network when the signup row does not exist', async () => {
		const {axios, mockGetConnection, logger, syncNewsletterSignup} = freshImports();
		mockGetConnection.mockResolvedValue(makeConn([]));

		await syncNewsletterSignup(999);

		expect(logger.error).toHaveBeenCalledWith(expect.stringContaining('not found'), {signupId: 999});
		expect(axios.post).not.toHaveBeenCalled();
	});
});

describe('syncNewsletterSignup - enabled mode', () => {
	beforeEach(() => {
		jest.resetModules();
		process.env = {
			...ORIGINAL_ENV,
			SALESFORCE_ENABLED: 'true',
			SALESFORCE_API_URL: 'https://example.my.salesforce.com',
			SALESFORCE_CLIENT_ID: 'client-id',
			SALESFORCE_CLIENT_SECRET: 'client-secret'
		};
	});

	it('fetches a token, posts the signup, and marks the row SENT with the returned record id', async () => {
		const {axios, mockGetConnection, syncNewsletterSignup} = freshImports();
		const updateConn = makeConn([]);
		mockGetConnection.mockResolvedValueOnce(makeConn([SIGNUP_ROW])).mockResolvedValueOnce(updateConn);
		axios.post.mockImplementation((url: string) => {
			if (url.endsWith('/services/oauth2/token')) return Promise.resolve({data: {access_token: 'tok-1'}});
			if (url.endsWith('/services/apexrest/newsletter/signup')) {
				return Promise.resolve({data: {status: 'PENDING_CONFIRMATION', salesforceObject: 'Lead', salesforceRecordId: '00Q1234', created: true}});
			}
			throw new Error(`unexpected url ${url}`);
		});

		await syncNewsletterSignup(7);

		expect(axios.post).toHaveBeenCalledWith(
			'https://example.my.salesforce.com/services/oauth2/token',
			expect.any(String),
			expect.objectContaining({headers: {'Content-Type': 'application/x-www-form-urlencoded'}})
		);
		expect(axios.post).toHaveBeenCalledWith(
			'https://example.my.salesforce.com/services/apexrest/newsletter/signup',
			{firstName: 'Erika', lastName: 'Mustermann', email: 'erika@example.com', eventName: 'Sommerkonzert 2026'},
			expect.objectContaining({headers: {Authorization: 'Bearer tok-1'}})
		);
		expect(updateConn.query).toHaveBeenCalledWith(expect.stringContaining("sync_status = 'SENT'"), ['00Q1234', 7]);
	});

	it('reuses the cached token across two calls instead of fetching twice', async () => {
		const {axios, mockGetConnection, syncNewsletterSignup} = freshImports();
		mockGetConnection
			.mockResolvedValueOnce(makeConn([SIGNUP_ROW]))
			.mockResolvedValueOnce(makeConn([]))
			.mockResolvedValueOnce(makeConn([SIGNUP_ROW]))
			.mockResolvedValueOnce(makeConn([]));
		axios.post.mockImplementation((url: string) => {
			if (url.endsWith('/services/oauth2/token')) return Promise.resolve({data: {access_token: 'tok-1'}});
			return Promise.resolve({data: {status: 'PENDING_CONFIRMATION', salesforceObject: 'Lead', salesforceRecordId: '00Q1234', created: true}});
		});

		await syncNewsletterSignup(7);
		await syncNewsletterSignup(7);

		const tokenCalls = axios.post.mock.calls.filter(([url]: [string]) => url.endsWith('/services/oauth2/token'));
		expect(tokenCalls).toHaveLength(1);
	});

	it('retries once with a fresh token on a 401, then succeeds', async () => {
		const {axios, mockGetConnection, syncNewsletterSignup} = freshImports();
		const updateConn = makeConn([]);
		mockGetConnection.mockResolvedValueOnce(makeConn([SIGNUP_ROW])).mockResolvedValueOnce(updateConn);

		let tokenFetches = 0;
		axios.post.mockImplementation((url: string) => {
			if (url.endsWith('/services/oauth2/token')) {
				tokenFetches += 1;
				return Promise.resolve({data: {access_token: `tok-${tokenFetches}`}});
			}
			if (url.endsWith('/services/apexrest/newsletter/signup')) {
				if (tokenFetches === 1) {
					const err: any = new Error('Unauthorized');
					err.response = {status: 401, data: {message: 'Session expired'}};
					return Promise.reject(err);
				}
				return Promise.resolve({data: {status: 'PENDING_CONFIRMATION', salesforceObject: 'Lead', salesforceRecordId: '00Q9999', created: true}});
			}
			throw new Error(`unexpected url ${url}`);
		});

		await syncNewsletterSignup(7);

		expect(tokenFetches).toBe(2);
		expect(updateConn.query).toHaveBeenCalledWith(expect.stringContaining("sync_status = 'SENT'"), ['00Q9999', 7]);
	});

	it('marks the row FAILED with the error message on a non-401 error, without throwing', async () => {
		const {axios, mockGetConnection, logger, syncNewsletterSignup} = freshImports();
		const updateConn = makeConn([]);
		mockGetConnection.mockResolvedValueOnce(makeConn([SIGNUP_ROW])).mockResolvedValueOnce(updateConn);
		axios.post.mockImplementation((url: string) => {
			if (url.endsWith('/services/oauth2/token')) return Promise.resolve({data: {access_token: 'tok-1'}});
			const err: any = new Error('Internal error');
			err.response = {status: 500, data: {message: 'The newsletter signup could not be processed.'}};
			return Promise.reject(err);
		});

		await expect(syncNewsletterSignup(7)).resolves.toBeUndefined();

		expect(updateConn.query).toHaveBeenCalledWith(
			expect.stringContaining("sync_status = 'FAILED'"),
			['The newsletter signup could not be processed.', 7]
		);
		expect(logger.error).toHaveBeenCalledWith('syncNewsletterSignup failed', expect.objectContaining({signupId: 7}));
	});

	it('marks the row FAILED with a clear message when client credentials are not configured', async () => {
		process.env.SALESFORCE_CLIENT_ID = '';
		const {mockGetConnection, syncNewsletterSignup} = freshImports();
		const updateConn = makeConn([]);
		mockGetConnection.mockResolvedValueOnce(makeConn([SIGNUP_ROW])).mockResolvedValueOnce(updateConn);

		await syncNewsletterSignup(7);

		expect(updateConn.query).toHaveBeenCalledWith(
			expect.stringContaining("sync_status = 'FAILED'"),
			[expect.stringContaining('SALESFORCE_CLIENT_ID'), 7]
		);
	});
});