// salesforce.client caches the OAuth token at module scope, so every test
// resets the module registry for a clean cache and re-requires axios + the
// module under test after the reset (same approach as
// test/feedback/salesforce.service.test.ts).

export {}; // isolate module scope from other script-style test files

jest.mock('axios');

const freshImports = () => {
	const axios = require('axios');
	const {salesforceApexRestPost, salesforceEnabled} = require('../../src/common/salesforce.client');
	return {axios, salesforceApexRestPost, salesforceEnabled};
};

const ORIGINAL_ENV = {...process.env};
const ENABLED_ENV = {
	...ORIGINAL_ENV,
	SALESFORCE_ENABLED: 'true',
	SALESFORCE_API_URL: 'https://example.my.salesforce.com',
	SALESFORCE_CLIENT_ID: 'client-id',
	SALESFORCE_CLIENT_SECRET: 'client-secret'
};

beforeEach(() => {
	jest.resetModules();
	process.env = {...ENABLED_ENV};
});

afterAll(() => {
	process.env = {...ORIGINAL_ENV};
});

describe('salesforceEnabled', () => {
	it('is true only when SALESFORCE_ENABLED === "true"', () => {
		process.env.SALESFORCE_ENABLED = 'true';
		expect(freshImports().salesforceEnabled()).toBe(true);

		jest.resetModules();
		process.env.SALESFORCE_ENABLED = 'false';
		expect(freshImports().salesforceEnabled()).toBe(false);
	});
});

describe('salesforceApexRestPost', () => {
	it('fetches a token, posts to the given Apex REST path, and returns the response body', async () => {
		const {axios, salesforceApexRestPost} = freshImports();
		axios.post.mockImplementation((url: string) => {
			if (url.endsWith('/services/oauth2/token')) return Promise.resolve({data: {access_token: 'tok-1'}});
			return Promise.resolve({data: {ok: true}});
		});

		const result = await salesforceApexRestPost('/services/apexrest/email/send', {to: 'x@example.com'});

		expect(result).toEqual({ok: true});
		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/email/send',
			{to: 'x@example.com'},
			expect.objectContaining({headers: {Authorization: 'Bearer tok-1'}})
		);
	});

	it('reuses the cached token across calls instead of fetching twice', async () => {
		const {axios, salesforceApexRestPost} = freshImports();
		axios.post.mockImplementation((url: string) => {
			if (url.endsWith('/services/oauth2/token')) return Promise.resolve({data: {access_token: 'tok-1'}});
			return Promise.resolve({data: {}});
		});

		await salesforceApexRestPost('/services/apexrest/email/send', {});
		await salesforceApexRestPost('/services/apexrest/email/send', {});

		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, salesforceApexRestPost} = freshImports();
		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 (tokenFetches === 1) {
				const err: any = new Error('Unauthorized');
				err.response = {status: 401};
				return Promise.reject(err);
			}
			return Promise.resolve({data: {ok: true}});
		});

		const result = await salesforceApexRestPost('/services/apexrest/email/send', {});

		expect(result).toEqual({ok: true});
		expect(tokenFetches).toBe(2);
	});

	it('does not retry on a non-401 error and rethrows it', async () => {
		const {axios, salesforceApexRestPost} = freshImports();
		axios.post.mockImplementation((url: string) => {
			if (url.endsWith('/services/oauth2/token')) return Promise.resolve({data: {access_token: 'tok-1'}});
			const err: any = new Error('Server error');
			err.response = {status: 500};
			return Promise.reject(err);
		});

		await expect(salesforceApexRestPost('/services/apexrest/email/send', {})).rejects.toThrow('Server error');
		const endpointCalls = axios.post.mock.calls.filter(([url]: [string]) => url.endsWith('/email/send'));
		expect(endpointCalls).toHaveLength(1);
	});

	it('throws a clear error when client credentials are not configured', async () => {
		process.env.SALESFORCE_CLIENT_ID = '';
		const {salesforceApexRestPost} = freshImports();

		await expect(salesforceApexRestPost('/services/apexrest/email/send', {})).rejects.toThrow('SALESFORCE_CLIENT_ID');
	});
});