/**
 * Integration tests for QueueProcessor
 *
 * Tests the processor's ability to handle queue items through mocked dependencies.
 * The QueueProcessor auto-starts, so these tests verify actual processing behavior.
 */

import { describe, it, expect, beforeEach, vi, afterEach } from 'vitest';
import { queueManager } from '$lib/server/queue/QueueManager';

// Mock web-push module BEFORE importing modules that depend on it
vi.mock('web-push', () => ({
	default: {
		setVapidDetails: vi.fn(),
		sendNotification: vi.fn().mockResolvedValue(undefined)
	}
}));

// Mock queueConfig BEFORE importing QueueProcessor
vi.mock('$lib/server/queue/config', () => ({
	queueConfig: {
		concurrency: 2,
		maxRetries: 3,
		tandoor: {
			enabled: true,
			token: 'test-token',
			serverUrl: 'http://localhost:8080'
		},
		push: {
			vapidPublicKey:
				'BNextdcB_fQ0BVvyGioM5L8Tf9vKQjs-WnF-rUbnU8MdWIZQYfggIHxBnW21I-lq_0HykLCdMpYj8d5joavWdxQ',
			vapidPrivateKey: 'JwxI_KcsBcehYcTOufMcbVWJjCq1QbH5FJmSyQuG680',
			vapidEmail: 'mailto:test@example.com'
		}
	}
}));

// Mock external dependencies BEFORE importing QueueProcessor.
// QueueProcessor.extractionPhase picks between two extractor modules based on
// EXTRACTOR_BACKEND; mock both so behavior is identical regardless of default.
vi.mock('$lib/server/extraction', () => ({
	extractTextAndThumbnail: vi.fn().mockResolvedValue({
		bodyText: 'Default recipe text',
		thumbnail: null
	})
}));
vi.mock('$lib/server/instagram-extractor', () => ({
	extractTextAndThumbnail: vi.fn().mockResolvedValue({
		bodyText: 'Default recipe text',
		thumbnail: null
	})
}));

vi.mock('$lib/server/parser', () => ({
	extractRecipe: vi.fn().mockResolvedValue({
		name: 'Default Recipe',
		ingredients: ['ingredient 1'],
		steps: ['step 1'],
		description: 'A default recipe'
	})
}));

vi.mock('$lib/server/tandoor', () => ({
	uploadRecipeWithIngredientsDTO: vi.fn().mockResolvedValue({
		success: true,
		recipeId: 999
	}),
	uploadRecipeImage: vi.fn().mockResolvedValue({
		success: true
	})
}));

import { extractTextAndThumbnail as extractFromExtraction } from '$lib/server/extraction';
import { extractTextAndThumbnail as extractFromYtDlp } from '$lib/server/instagram-extractor';
import { extractRecipe } from '$lib/server/parser';
import { uploadRecipeWithIngredientsDTO, uploadRecipeImage } from '$lib/server/tandoor';
import * as configModule from '$lib/server/queue/config';

// Alias used by existing assertions; default backend is ytdlp so the new
// instagram-extractor mock is what the processor actually invokes.
const extractTextAndThumbnail = extractFromYtDlp;

// Import processor AFTER mocks - it will auto-start (imported for side effects)
import '$lib/server/queue/QueueProcessor';

describe('QueueProcessor Integration Tests', () => {
	beforeEach(async () => {
		// Clear queue
		queueManager.getAll().forEach((item) => queueManager.remove(item.id));

		// Reset mocks and their implementations
		vi.resetAllMocks();

		// Set default mock implementations on BOTH backend modules so the test
		// behavior is invariant to EXTRACTOR_BACKEND.
		vi.mocked(extractFromExtraction).mockResolvedValue({
			bodyText: 'Default recipe text',
			thumbnail: null
		});
		vi.mocked(extractFromYtDlp).mockResolvedValue({
			bodyText: 'Default recipe text',
			thumbnail: null
		});

		vi.mocked(extractRecipe).mockResolvedValue({
			name: 'Default Recipe',
			servings: 2,
			ingredients: [{ item: 'ingredient 1', amount: '1', unit: 'piece' }],
			steps: ['step 1'],
			description: 'A default recipe'
		});

		vi.mocked(uploadRecipeWithIngredientsDTO).mockResolvedValue({
			success: true,
			recipeId: 999
		});

		vi.mocked(uploadRecipeImage).mockResolvedValue({
			success: true
		});
	});

	afterEach(async () => {
		// Wait for any pending processing to complete
		await new Promise((resolve) => setTimeout(resolve, 100));
	});

	it('should process item through all phases when Tandoor is configured', async () => {
		// Set up successful mocks
		vi.mocked(extractTextAndThumbnail).mockResolvedValue({
			bodyText: 'Recipe instructions here',
			thumbnail: 'https://example.com/thumb.jpg'
		});

		vi.mocked(extractRecipe).mockResolvedValue({
			name: 'Test Recipe',
			servings: 4,
			ingredients: [
				{ item: 'flour', amount: '2', unit: 'cups' },
				{ item: 'eggs', amount: '2', unit: 'pieces' }
			],
			steps: ['mix', 'bake'],
			description: 'test'
		});

		vi.mocked(uploadRecipeWithIngredientsDTO).mockResolvedValue({
			success: true,
			recipeId: 123
		});

		// Enqueue (processor is already running from auto-start)
		// Note: Tandoor is enabled in the mocked config
		const item = queueManager.enqueue('https://instagram.com/p/test-tandoor');

		// Wait for processing to complete - increased timeout
		await new Promise((resolve) => setTimeout(resolve, 1000));

		const updated = queueManager.get(item.id);

		// Verify success
		expect(updated?.status).toBe('success');
		expect(updated?.extractedText).toBe('Recipe instructions here');
		expect(updated?.recipe?.name).toBe('Test Recipe');
		expect(updated?.tandoorRecipeId).toBe(123);

		// Verify all functions were called
		expect(extractTextAndThumbnail).toHaveBeenCalled();
		expect(extractRecipe).toHaveBeenCalled();
		expect(uploadRecipeWithIngredientsDTO).toHaveBeenCalled();
	}, 10000); // Increase timeout for processing

	it('should skip Tandoor upload when not configured', async () => {
		// Temporarily disable Tandoor for this test
		const originalConfig = { ...configModule.queueConfig };
		vi.spyOn(configModule, 'queueConfig', 'get').mockReturnValue({
			...originalConfig,
			tandoor: {
				enabled: false,
				token: null,
				serverUrl: null
			}
		});

		vi.mocked(extractTextAndThumbnail).mockResolvedValue({
			bodyText: 'Recipe text',
			thumbnail: null
		});

		vi.mocked(extractRecipe).mockResolvedValue({
			name: 'No Tandoor Recipe',
			servings: null,
			ingredients: [],
			steps: [],
			description: ''
		});

		const item = queueManager.enqueue('https://instagram.com/p/no-tandoor');

		await new Promise((resolve) => setTimeout(resolve, 800));

		const updated = queueManager.get(item.id);

		// Should still succeed without Tandoor
		expect(updated?.status).toBe('success');
		expect(updated?.recipe?.name).toBe('No Tandoor Recipe');
		expect(uploadRecipeWithIngredientsDTO).not.toHaveBeenCalled();

		// Restore mock
		vi.restoreAllMocks();
	}, 10000);

	it('should handle extraction errors', async () => {
		vi.mocked(extractTextAndThumbnail).mockRejectedValue(new Error('Network timeout'));

		const item = queueManager.enqueue('https://instagram.com/p/error');

		await new Promise((resolve) => setTimeout(resolve, 800));

		const updated = queueManager.get(item.id);

		// Should mark as unhealthy (recoverable)
		expect(updated?.status).toBe('unhealthy');
		expect(updated?.error?.message).toContain('timeout');
	}, 10000);

	it('should handle parsing failure', async () => {
		vi.mocked(extractTextAndThumbnail).mockResolvedValue({
			bodyText: 'Not a recipe',
			thumbnail: null
		});

		vi.mocked(extractRecipe).mockResolvedValue(null);

		const item = queueManager.enqueue('https://instagram.com/p/not-recipe');

		await new Promise((resolve) => setTimeout(resolve, 800));

		const updated = queueManager.get(item.id);

		// Should mark as error (non-recoverable - no recipe found)
		expect(updated?.status).toBe('error');
		expect(updated?.error?.message).toContain('recipe');
	}, 10000);

	it('should process multiple items respecting concurrency', async () => {
		// Set up mocks with delay to observe concurrency
		vi.mocked(extractTextAndThumbnail).mockImplementation(async () => {
			await new Promise((resolve) => setTimeout(resolve, 300));
			return { bodyText: 'text', thumbnail: null };
		});

		vi.mocked(extractRecipe).mockResolvedValue({
			name: 'Concurrent Recipe',
			servings: null,
			ingredients: [],
			steps: [],
			description: ''
		});

		// Enqueue 3 items (Tandoor enabled by default in config mock)
		queueManager.enqueue('https://instagram.com/p/item1');
		queueManager.enqueue('https://instagram.com/p/item2');
		queueManager.enqueue('https://instagram.com/p/item3');

		// Wait a bit for processor to start working
		await new Promise((resolve) => setTimeout(resolve, 150));

		const items = queueManager.getAll();
		const inProgress = items.filter((i) => i.status === 'in_progress');

		// With concurrency=2, should have max 2 in progress at once
		expect(inProgress.length).toBeLessThanOrEqual(2);

		// Wait for all to complete
		await new Promise((resolve) => setTimeout(resolve, 2000));

		const final = queueManager.getAll();
		const completed = final.filter((i) => i.status === 'success');

		// All 3 should eventually complete
		expect(completed.length).toBe(3);
	}, 15000);
});