import time from '../time';
import NoteResource from '../models/NoteResource';
import ResourceService from '../services/ResourceService';
import shim from '../shim';
import { resourceService, decryptionWorker, supportDir, encryptionService, loadEncryptionMasterKey, allSyncTargetItemsEncrypted, setupDatabaseAndSynchronizer, db, synchronizer, switchClient } from '../testing/test-utils';
import Folder from '../models/Folder';
import Note from '../models/Note';
import Resource from '../models/Resource';
import SearchEngine from './search/SearchEngine';
import { loadMasterKeysFromSettings, setupAndEnableEncryption } from './e2ee/utils';

describe('services/ResourceService', () => {

	beforeEach(async () => {
		await setupDatabaseAndSynchronizer(1);
		await setupDatabaseAndSynchronizer(2);
		await switchClient(1);
	});

	it('should delete orphaned resources', (async () => {
		const service = new ResourceService();

		const folder1 = await Folder.save({ title: 'folder1' });
		let note1 = await Note.save({ title: 'ma note', parent_id: folder1.id });
		note1 = await shim.attachFileToNote(note1, `${supportDir}/photo.jpg`);
		const resource1 = (await Resource.all())[0];
		const resourcePath = Resource.fullPath(resource1);

		await service.indexNoteResources();
		await service.deleteOrphanResources(0);

		expect(!!(await Resource.load(resource1.id))).toBe(true);

		await Note.delete(note1.id);
		await service.deleteOrphanResources(0);

		expect(!!(await Resource.load(resource1.id))).toBe(true);

		await service.indexNoteResources();
		await service.deleteOrphanResources(1000 * 60);

		expect(!!(await Resource.load(resource1.id))).toBe(true);

		await service.deleteOrphanResources(0);

		expect(!!(await Resource.load(resource1.id))).toBe(false);
		expect(await shim.fsDriver().exists(resourcePath)).toBe(false);
		expect(!(await NoteResource.all()).length).toBe(true);
	}));

	it.each([
		{
			linkStyle: 'image 1',
			markupTag: (id: string) => `![image](:/${id})`,
		},
		{
			linkStyle: 'image 2',
			markupTag: (id: string) => `![image][image]\n\n[image]: :/${id}`,
		},
		{
			linkStyle: 'html link',
			markupTag: (id: string) => `<a href=":/${id}">test</a>`,
		},
	])('should not delete resource if still associated with at least one note (link style: $linkStyle)', (async ({ markupTag }) => {
		const service = new ResourceService();

		const folder1 = await Folder.save({ title: 'folder1' });
		let note1 = await Note.save({ title: 'ma note', parent_id: folder1.id });
		const note2 = await Note.save({ title: 'ma deuxième note', parent_id: folder1.id });
		note1 = await shim.attachFileToNote(note1, `${supportDir}/photo.jpg`);
		const resource1 = (await Resource.all())[0];

		await service.indexNoteResources();

		await Note.delete(note1.id);

		await service.indexNoteResources();

		await Note.save({ id: note2.id, body: markupTag(resource1.id) });

		await service.indexNoteResources();

		await service.deleteOrphanResources(0);

		expect(!!(await Resource.load(resource1.id))).toBe(true);
	}));

	// This is now handled below by more correct tests
	//
	// it('should not delete a resource that has never been associated with any note, because it probably means the resource came via sync, and associated note has not arrived yet', (async () => {
	// 	const service = new ResourceService();
	// 	await shim.createResourceFromPath(`${supportDir}/photo.jpg`);

	// 	await service.indexNoteResources();
	// 	await service.deleteOrphanResources(0);

	// 	expect((await Resource.all()).length).toBe(1);
	// }));

	it('should not delete resource if it is used in an IMG tag', (async () => {
		const service = new ResourceService();

		const folder1 = await Folder.save({ title: 'folder1' });
		let note1 = await Note.save({ title: 'ma note', parent_id: folder1.id });
		note1 = await shim.attachFileToNote(note1, `${supportDir}/photo.jpg`);
		const resource1 = (await Resource.all())[0];

		await service.indexNoteResources();

		await Note.save({ id: note1.id, body: `This is HTML: <img src=":/${resource1.id}"/>` });

		await service.indexNoteResources();

		await service.deleteOrphanResources(0);

		expect(!!(await Resource.load(resource1.id))).toBe(true);
	}));

	it('should not process twice the same change', (async () => {
		const service = new ResourceService();

		const folder1 = await Folder.save({ title: 'folder1' });
		const note1 = await Note.save({ title: 'ma note', parent_id: folder1.id });
		await shim.attachFileToNote(note1, `${supportDir}/photo.jpg`);

		await service.indexNoteResources();

		const before = (await NoteResource.all())[0];

		await time.sleep(0.1);

		await service.indexNoteResources();

		const after = (await NoteResource.all())[0];

		expect(before.last_seen_time).toBe(after.last_seen_time);
	}));

	it('should not delete resources that are associated with an encrypted note', (async () => {
		// https://github.com/laurent22/joplin/issues/1433
		//
		// Client 1 and client 2 have E2EE setup.
		//
		// - Client 1 creates note N1 and add resource R1 to it
		// - Client 1 syncs
		// - Client 2 syncs and get N1
		// - Client 2 add resource R2 to N1
		// - Client 2 syncs
		// - Client 1 syncs
		// - Client 1 runs resource indexer - but because N1 hasn't been decrypted yet, it found that R1 is no longer associated with any note
		// - Client 1 decrypts notes, but too late
		//
		// Eventually R1 is deleted because service thinks that it was at some point associated with a note, but no longer.

		const masterKey = await loadEncryptionMasterKey();
		await setupAndEnableEncryption(encryptionService(), masterKey, '123456');
		await loadMasterKeysFromSettings(encryptionService());
		const folder1 = await Folder.save({ title: 'folder1' });
		const note1 = await Note.save({ title: 'ma note', parent_id: folder1.id });
		await shim.attachFileToNote(note1, `${supportDir}/photo.jpg`); // R1
		await resourceService().indexNoteResources();
		await synchronizer().start();
		expect(await allSyncTargetItemsEncrypted()).toBe(true);

		await switchClient(2);

		await synchronizer().start();
		await setupAndEnableEncryption(encryptionService(), masterKey, '123456');
		await loadMasterKeysFromSettings(encryptionService());
		await decryptionWorker().start();
		{
			const n1 = await Note.load(note1.id);
			await shim.attachFileToNote(n1, `${supportDir}/photo.jpg`); // R2
		}
		await synchronizer().start();

		await switchClient(1);

		await synchronizer().start();
		await resourceService().indexNoteResources();
		await resourceService().deleteOrphanResources(0); // Previously, R1 would be deleted here because it's not indexed
		expect((await Resource.all()).length).toBe(2);
	}));

	it('should double-check if the resource is still linked before deleting it', (async () => {
		SearchEngine.instance().setDb(db()); // /!\ Note that we use the global search engine here, which we shouldn't but will work for now

		const folder1 = await Folder.save({ title: 'folder1' });
		let note1 = await Note.save({ title: 'ma note', parent_id: folder1.id });
		note1 = await shim.attachFileToNote(note1, `${supportDir}/photo.jpg`);
		await resourceService().indexNoteResources();
		const bodyWithResource = note1.body;
		await Note.save({ id: note1.id, body: '' });
		await resourceService().indexNoteResources();
		await Note.save({ id: note1.id, body: bodyWithResource });
		await SearchEngine.instance().syncTables();
		await resourceService().deleteOrphanResources(0);

		expect((await Resource.all()).length).toBe(1); // It should not have deleted the resource
		const nr = (await NoteResource.all())[0];
		expect(!!nr.is_associated).toBe(true); // And it should have fixed the situation by re-indexing the note content
	}));

	it('should delete a resource if it is not associated with any note and has never been synced', (async () => {
		// - User creates a note and attaches a resource
		// - User deletes the note
		// - NoteResource service runs - the resource can be deleted
		//
		// This is because, since the resource didn't come via sync, it's
		// guaranteed that it is orphaned, which means it can be safely deleted.
		// See related test below to handle case where the resource actually
		// comes via sync.

		const note = await Note.save({});
		await shim.attachFileToNote(note, `${supportDir}/photo.jpg`);
		await Note.delete(note.id);
		const resource = (await Resource.all())[0];

		await resourceService().indexNoteResources();
		await resourceService().deleteOrphanResources(-10);

		expect(await Resource.load(resource.id)).toBeFalsy();
	}));

	it('should NOT delete a resource if it arrived via synced, even if it is not associated with any note', (async () => {
		// - C1 creates Resource 1
		// - C1 sync
		// - C2 sync
		// - NoteResource service runs - should find an orphan resource, but not
		//   delete it because the associated note might come later from U1.
		//
		// At this point, C1 has the knowledge about Resource 1 so whether it's
		// eventually deleted or not will come from there. If it's an orphaned
		// resource, it will be deleted on C1 first, then the deletion will be
		// synced to other clients.

		const note = await Note.save({});
		await shim.attachFileToNote(note, `${supportDir}/photo.jpg`);
		await Note.delete(note.id);
		const resource = (await Resource.all())[0];
		await synchronizer().start();

		await switchClient(2);

		await synchronizer().start();
		await resourceService().indexNoteResources();
		await resourceService().deleteOrphanResources(0);
		expect(await Resource.load(resource.id)).toBeTruthy();
	}));

	it('should still create associations for notes in the trash', async () => {
		const note = await Note.save({});
		await shim.attachFileToNote(note, `${supportDir}/photo.jpg`);
		await Note.delete(note.id, { toTrash: true });
		await resourceService().indexNoteResources();

		// Check that the association is made despite the note being deleted
		const noteResources = await NoteResource.all();
		expect(noteResources.length).toBe(1);
		expect(noteResources[0].note_id).toBe(note.id);

		// Also check that the resources are not deleted as orphan
		await resourceService().deleteOrphanResources(0);
		expect((await NoteResource.all()).length).toBe(1);
	});

});
