import { describe, it, expect, vi, beforeEach } from 'vitest';
import * as AuthController from '../../src/controllers/auth.controller.js';
import * as ReviewController from '../../src/controllers/review.controller.js';
import * as SyncController from '../../src/controllers/sync.controller.js';
import * as CollectionController from '../../src/controllers/collection.controller.js';

import * as AuthService from '../../src/services/auth.service.js';
import * as ReviewService from '../../src/services/review.service.js';
import * as SyncService from '../../src/services/sync.service.js';
import * as StatsService from '../../src/services/stats.service.js';
import { StudyItem } from '../../src/models/StudyItem.js';

vi.mock('../../src/services/auth.service.js');
vi.mock('../../src/services/review.service.js');
vi.mock('../../src/services/sync.service.js');
vi.mock('../../src/services/stats.service.js');
vi.mock('../../src/models/StudyItem.js');

const mockReq = (body = {}, user = {}, query = {}) => ({ body, user, query });
const mockReply = () => {
	const res = {};
	res.code = vi.fn().mockReturnValue(res);
	res.send = vi.fn().mockReturnValue(res);
	res.jwtSign = vi.fn().mockResolvedValue('token');
	return res;
};

describe('Controllers', () => {
	beforeEach(() => {
		vi.clearAllMocks();
	});

	describe('Auth Controller', () => {
		it('login should fail without apiKey', async () => {
			const reply = mockReply();
			await AuthController.login(mockReq({}), reply);
			expect(reply.code).toHaveBeenCalledWith(400);
		});

		it('login should succeed', async () => {
			const reply = mockReply();
			AuthService.loginUser.mockResolvedValue({ _id: 1, tokenVersion: 1 });
			await AuthController.login(mockReq({ apiKey: 'key' }), reply);
			expect(reply.jwtSign).toHaveBeenCalled();
			expect(reply.code).not.toHaveBeenCalledWith(401);
		});

		it('login should catch errors', async () => {
			const reply = mockReply();
			AuthService.loginUser.mockRejectedValue(new Error('fail'));
			await AuthController.login(mockReq({ apiKey: 'k' }), reply);
			expect(reply.code).toHaveBeenCalledWith(401);
		});

		it('logout should succeed', async () => {
			const reply = mockReply();
			await AuthController.logout(mockReq({}, { _id: 1 }), reply);
			expect(AuthService.logoutUser).toHaveBeenCalled();
		});
	});

	describe('Review Controller', () => {
		it('submitReview should succeed', async () => {
			const reply = mockReply();
			ReviewService.processReview.mockResolvedValue({});
			await ReviewController.submitReview(mockReq({}), reply);
			expect(reply.send).toHaveBeenCalled();
		});

		it('submitReview should handle error', async () => {
			const reply = mockReply();
			ReviewService.processReview.mockRejectedValue(new Error('err'));
			await ReviewController.submitReview(mockReq({}), reply);
			expect(reply.code).toHaveBeenCalledWith(404);
		});
	});

	describe('Sync Controller', () => {
		it('sync should succeed', async () => {
			const reply = mockReply();
			SyncService.syncWithWaniKani.mockResolvedValue({});
			await SyncController.sync(mockReq({}, {}), reply);
			expect(reply.send).toHaveBeenCalled();
		});

		it('sync should handle error', async () => {
			const reply = mockReply();
			SyncService.syncWithWaniKani.mockRejectedValue(new Error('err'));
			await SyncController.sync(mockReq({}, {}), reply);
			expect(reply.code).toHaveBeenCalledWith(500);
		});
	});

	describe('Collection Controller', () => {
		it('getCollection should return items', async () => {
			const reply = mockReply();
			StudyItem.find.mockResolvedValue([]);
			await CollectionController.getCollection(mockReq({}, { _id: 1 }), reply);
			expect(reply.send).toHaveBeenCalledWith([]);
		});

		it('getQueue should call service with default limit', async () => {
			const reply = mockReply();
			ReviewService.getQueue.mockResolvedValue([]);
			await CollectionController.getQueue(mockReq({}, {}, {}), reply);
			expect(ReviewService.getQueue).toHaveBeenCalledWith(expect.anything(), 20, undefined);
		});

		it('getQueue should call service with provided limit', async () => {
			const reply = mockReply();
			ReviewService.getQueue.mockResolvedValue([]);
			await CollectionController.getQueue(mockReq({}, {}, { limit: '50' }), reply);
			expect(ReviewService.getQueue).toHaveBeenCalledWith(expect.anything(), 50, undefined);
		});

		it('getStats should call service', async () => {
			const reply = mockReply();
			StatsService.getUserStats.mockResolvedValue({});
			await CollectionController.getStats(mockReq({}, {}), reply);
			expect(StatsService.getUserStats).toHaveBeenCalled();
		});

		it('updateSettings should initialize settings if missing', async () => {
			const reply = mockReply();
			const save = vi.fn();
			const user = { save };
			await CollectionController.updateSettings(mockReq({ batchSize: 50 }, user), reply);
			expect(user.settings).toBeDefined();
			expect(user.settings.batchSize).toBe(50);
			expect(save).toHaveBeenCalled();
		});

		it('updateSettings should update drawingAccuracy', async () => {
			const reply = mockReply();
			const save = vi.fn();
			const user = { settings: {}, save };
			await CollectionController.updateSettings(mockReq({ drawingAccuracy: 5 }, user), reply);
			expect(user.settings.drawingAccuracy).toBe(5);
			expect(save).toHaveBeenCalled();
		});
	});
});