'use strict';

const assert = require('assert');
const nconf = require('nconf');

const db = require('../mocks/databasemock');
const meta = require('../../src/meta');
const install = require('../../src/install');
const user = require('../../src/user');
const categories = require('../../src/categories');
const posts = require('../../src/posts');
const topics = require('../../src/topics');
const api = require('../../src/api');
const activitypub = require('../../src/activitypub');
const utils = require('../../src/utils');

const helpers = require('./helpers');

describe('Notes', () => {
	before(async () => {
		meta.config.activitypubEnabled = 1;
		await install.giveWorldPrivileges();
	});

	describe('Assertion', () => {
		describe('Public objects', () => {
			it('should pull a remote root-level object by its id and create a new topic', async () => {
				const { id } = helpers.mocks.note();
				const assertion = await activitypub.notes.assert(0, id, { skipChecks: true });
				assert(assertion);

				const { tid, count } = assertion;
				assert(tid);
				assert.strictEqual(count, 1);

				const exists = await topics.exists(tid);
				assert(exists);
			});

			it('should assert if the cc property is missing', async () => {
				const { id } = helpers.mocks.note({ cc: 'remove' });
				const assertion = await activitypub.notes.assert(0, id, { skipChecks: true });
				assert(assertion);

				const { tid, count } = assertion;
				assert(tid);
				assert.strictEqual(count, 1);

				const exists = await topics.exists(tid);
				assert(exists);
			});

			it('should assert if the object is of type Video', async () => {
				const { id } = helpers.mocks.note({
					type: 'Video',
				});
				const assertion = await activitypub.notes.assert(0, id, { skipChecks: true });
				assert(assertion);

				const { tid, count } = assertion;
				assert(tid);
				assert.strictEqual(count, 1);

				const exists = await topics.exists(tid);
				assert(exists);
			});

			describe('Category-specific behaviours', () => {
				it('should slot newly created topic in local category if addressed', async () => {
					const { cid } = await categories.create({ name: utils.generateUUID() });
					const { id } = helpers.mocks.note({
						cc: [`${nconf.get('url')}/category/${cid}`],
					});

					const assertion = await activitypub.notes.assert(0, id);
					assert(assertion);

					const { tid, count } = assertion;
					assert(tid);
					assert.strictEqual(count, 1);

					const topic = await topics.getTopicData(tid);
					assert.strictEqual(topic.cid, cid);
				});

				it('should add a remote category topic to a user\'s inbox if they are following the category', async () => {
					const { id: cid, actor } = helpers.mocks.group();
					await activitypub.actors.assertGroup([cid]);

					const uid = await user.create({ username: utils.generateUUID() });
					await api.categories.setWatchState({ uid }, { cid, state: categories.watchStates.tracking });

					const { id } = helpers.mocks.note({
						cc: [cid],
					});
					const { tid } = await activitypub.notes.assert(0, id, { cid });

					const inInbox = await db.isSortedSetMember(`uid:${uid}:inbox`, tid);
					assert(inInbox);
				});
			});

			describe('User-specific behaviours', () => {
				let remoteCid;
				let uid;

				before(async () => {
					// Remote
					const { id, actor } = helpers.mocks.group();
					remoteCid = id;
					await activitypub.actors.assertGroup([id]);

					// User
					uid = await user.create({ username: utils.generateUUID() });
					await topics.markAllRead(uid);
				});

				it('should not show up in my unread if it is in cid -1', async () => {
					const { id } = helpers.mocks.note();
					const assertion = await activitypub.notes.assert(0, id, { skipChecks: 1 });
					assert(assertion);

					const unread = await topics.getTotalUnread(uid);
					assert.strictEqual(unread, 0);
				});

				it('should show up in my recent/unread if I am tracking the remote category', async () => {
					await api.categories.setWatchState({ uid }, {
						cid: remoteCid,
						state: categories.watchStates.tracking,
						uid,
					});

					const { id } = helpers.mocks.note({
						cc: [remoteCid],
					});
					const assertion = await activitypub.notes.assert(0, id, { cid: remoteCid });
					assert(assertion);

					const unread = await topics.getTotalUnread(uid);
					assert.strictEqual(unread, 1);

					await topics.markAllRead(uid);
				});

				it('should show up in recent/unread and notify me if I am watching the remote category', async () => {
					await api.categories.setWatchState({ uid }, {
						cid: remoteCid,
						state: categories.watchStates.watching,
						uid,
					});

					const { id, note } = helpers.mocks.note({
						cc: [remoteCid],
					});
					const assertion = await activitypub.notes.assert(0, id, { cid: remoteCid });
					assert(assertion);

					const unread = await topics.getTotalUnread(uid);
					assert.strictEqual(unread, 1);

					// Notification inbox delivery is async so can't test directly
					const exists = await db.exists(`notifications:new_topic:tid:${assertion.tid}:uid:${note.attributedTo}`);
					assert(exists);

					await topics.markAllRead(uid);
				});

				it('should not show up in recent/unread if I am ignoring the remote category', async () => {
					await api.categories.setWatchState({ uid }, {
						cid: remoteCid,
						state: categories.watchStates.ignoring,
						uid,
					});

					const { id, note } = helpers.mocks.note({
						cc: [remoteCid],
					});
					const assertion = await activitypub.notes.assert(0, id, { cid: remoteCid });
					assert(assertion);

					const unread = await topics.getTotalUnread(uid);
					assert.strictEqual(unread, 0);
				});
			});
		});

		describe('Private objects', () => {
			let recipientUid;

			before(async () => {
				recipientUid = await user.create({ username: utils.generateUUID().slice(0, 8) });
			});

			it('should NOT create a new topic or post when asserting a private note', async () => {
				const { id, note } = helpers.mocks.note({
					to: [`${nconf.get('url')}/uid/${recipientUid}`],
					cc: [],
				});
				const { activity } = helpers.mocks.create(note);
				const { roomId } = await activitypub.inbox.create({ body: activity });
				assert(roomId);
				assert(utils.isNumber(roomId));

				const exists = await posts.exists(id);
				assert(!exists);
			});

			it('should still assert if the cc property is missing', async () => {
				const { id, note } = helpers.mocks.note({
					to: [`${nconf.get('url')}/uid/${recipientUid}`],
					cc: 'remove',
				});
				const { activity } = helpers.mocks.create(note);
				const { roomId } = await activitypub.inbox.create({ body: activity });
				assert(roomId);
				assert(utils.isNumber(roomId));
			});
		});
	});

	describe('Creation', () => {
		let uid;

		before(async () => {
			uid = await user.create({ username: utils.generateUUID() });
		});

		describe('Local categories', () => {
			let cid;

			before(async () => {
				({ cid } = await categories.create({ name: utils.generateUUID() }));
				activitypub._sent.clear();
			});

			afterEach(() => {
				activitypub._sent.clear();
			});

			describe('new topics', () => {
				let activity;

				before(async () => {
					const { tid } = await api.topics.create({ uid }, {
						cid,
						title: utils.generateUUID(),
						content: utils.generateUUID(),
					});

					assert(tid);
					assert.strictEqual(activitypub._sent.size, 1);
					const key = Array.from(activitypub._sent.keys())[0];
					activity = activitypub._sent.get(key);
				});

				it('should federate out a Create activity', () => {
					assert(activity && activity.to);
					assert.strictEqual(activity.type, 'Create');
				});

				it('should have the local category addressed', () => {
					const addressees = new Set([
						...(activity.to || []),
						...(activity.cc || []),
						...(activity.bcc || []),
						...(activity.object.to || []),
						...(activity.object.cc || []),
						...(activity.object.bcc || []),
					]);

					assert(addressees.has(`${nconf.get('url')}/category/${cid}`));
				});

				it('should federate out an activity with object of type "Article"', () => {
					assert(activity.object && activity.object.type);
					assert.strictEqual(activity.object.type, 'Article');
				});
			});

			describe('new reply', () => {
				let activity;

				before(async () => {
					const { tid } = await api.topics.create({ uid }, {
						cid,
						title: utils.generateUUID(),
						content: utils.generateUUID(),
					});
					activitypub._sent.clear();

					const { pid } = await api.topics.reply({ uid }, {
						tid,
						content: utils.generateUUID(),
					});

					const key = Array.from(activitypub._sent.keys())[0];
					activity = activitypub._sent.get(key);
				});

				it('should federate out an activity with object of type "Note"', () => {
					assert(activity.object && activity.object.type);
					assert.strictEqual(activity.object.type, 'Note');
				});
			});
		});

		describe('Remote Categories', () => {
			let cid;

			before(async () => {
				({ id: cid } = helpers.mocks.group());
				await activitypub.actors.assert([cid]);
			});

			afterEach(() => {
				activitypub._sent.clear();
			});

			describe('new topics', () => {
				it('should federate out a Create activity with the remote community addressed', async () => {
					const { tid } = await api.topics.create({ uid }, {
						cid,
						title: utils.generateUUID(),
						content: utils.generateUUID(),
					});

					assert(tid);
					assert.strictEqual(activitypub._sent.size, 1);

					const key = Array.from(activitypub._sent.keys())[0];
					const activity = activitypub._sent.get(key);
					assert(activity && activity.to);
					assert.strictEqual(activity.type, 'Create');

					const addressees = new Set([
						...(activity.to || []),
						...(activity.cc || []),
						...(activity.bcc || []),
						...(activity.object.to || []),
						...(activity.object.cc || []),
						...(activity.object.bcc || []),
					]);

					assert(addressees.has(cid));
				});
			});

			describe('replies', () => {
				it('should federate out a Create activity with the remote community addressed', async () => {
					const { tid } = await api.topics.create({ uid }, {
						cid,
						title: utils.generateUUID(),
						content: utils.generateUUID(),
					});

					activitypub._sent.clear();

					const postData = await api.topics.reply({ uid }, {
						tid,
						content: utils.generateUUID(),
					});

					assert(postData);
					assert.strictEqual(activitypub._sent.size, 1);

					const key = Array.from(activitypub._sent.keys())[0];
					const activity = activitypub._sent.get(key);
					assert(activity && activity.to);
					assert.strictEqual(activity.type, 'Create');

					const addressees = new Set([
						...(activity.to || []),
						...(activity.cc || []),
						...(activity.bcc || []),
						...(activity.object.to || []),
						...(activity.object.cc || []),
						...(activity.object.bcc || []),
					]);

					assert(addressees.has(cid));
				});
			});
		});
	});

	describe('Inbox handling', () => {
		describe('helper self-check', () => {
			it('should generate a Like activity', () => {
				const object = utils.generateUUID();
				const { id: actor } = helpers.mocks.person();
				const { activity } = helpers.mocks.like({
					object,
					actor,
				});

				assert.deepStrictEqual(activity, {
					'@context': 'https://www.w3.org/ns/activitystreams',
					id: `${helpers.mocks._baseUrl}/like/${encodeURIComponent(object)}`,
					type: 'Like',
					actor,
					object,
				});
			});

			it('should generate an Announce activity wrapping a Like activity', () => {
				const object = utils.generateUUID();
				const { id: actor } = helpers.mocks.person();
				const { activity: like } = helpers.mocks.like({
					object,
					actor,
				});
				const { id: gActor } = helpers.mocks.group();
				const { activity } = helpers.mocks.announce({
					actor: gActor,
					object: like,
				});

				assert.deepStrictEqual(activity, {
					'@context': 'https://www.w3.org/ns/activitystreams',
					id: `${helpers.mocks._baseUrl}/announce/${encodeURIComponent(like.id)}`,
					type: 'Announce',
					to: [ 'https://www.w3.org/ns/activitystreams#Public' ],
					cc: [
						`${gActor}/followers`,
					],
					actor: gActor,
					object: like,
				});
			});
		});

		describe('Create', () => {
			let uid;

			before(async () => {
				uid = await user.create({ username: utils.generateUUID() });
			});

			describe('(Note)', () => {
				it('should create a new topic in cid -1', async () => {
					const { note, id } = helpers.mocks.note();
					const { activity } = helpers.mocks.create(note);

					await db.sortedSetAdd(`followersRemote:${note.attributedTo}`, Date.now(), uid);
					await activitypub.inbox.create({ body: activity });

					assert(await posts.exists(id));

					const cid = await posts.getCidByPid(id);
					assert.strictEqual(cid, -1);
				});

				it('should create a new topic in cid -1 even if a remote category is addressed', async () => {
					const { id: remoteCid } = helpers.mocks.group();
					const { note, id } = helpers.mocks.note({
						audience: [remoteCid],
					});
					const { activity } = helpers.mocks.create(note);

					await activitypub.inbox.create({ body: activity });

					assert(await posts.exists(id));

					const cid = await posts.getCidByPid(id);
					assert.strictEqual(cid, -1);
				});
			});
		});

		describe('Announce', () => {
			let cid;

			before(async () => {
				({ cid } = await categories.create({ name: utils.generateUUID().slice(0, 8) }));
			});

			describe('(Create)', () => {
				it('should create a new topic in a remote category if addressed', async () => {
					const { id: remoteCid } = helpers.mocks.group();
					const { id, note } = helpers.mocks.note({
						audience: [remoteCid],
					});
					let { activity } = helpers.mocks.create(note);
					({ activity } = helpers.mocks.announce({ actor: remoteCid, object: activity }));

					await activitypub.inbox.announce({ body: activity });

					assert(await posts.exists(id));

					const cid = await posts.getCidByPid(id);
					assert.strictEqual(cid, remoteCid);
				});
			});

			describe('(Create) or (Note) referencing local post', () => {
				let uid;
				let topicData;
				let postData;
				let localNote;
				let announces = 0;

				before(async () => {
					uid = await user.create({ username: utils.generateUUID().slice(0, 10) });
					({ topicData, postData } = await topics.post({
						cid,
						uid,
						title: utils.generateUUID(),
						content: utils.generateUUID(),
					}));
					localNote = await activitypub.mocks.notes.public(postData);
				});

				it('should increment announces counter when a remote user shares', async () => {
					const { id } = helpers.mocks.person();
					const { activity } = helpers.mocks.announce({
						actor: id,
						object: localNote,
						cc: [`${nconf.get('url')}/uid/${topicData.uid}`],
					});

					await activitypub.inbox.announce({ body: activity });
					announces += 1;

					const count = await posts.getPostField(topicData.mainPid, 'announces');
					assert.strictEqual(count, announces);
				});

				it('should contain the remote user announcer id in the post announces zset', async () => {
					const { id } = helpers.mocks.person();
					const { activity } = helpers.mocks.announce({
						actor: id,
						object: localNote,
						cc: [`${nconf.get('url')}/uid/${topicData.uid}`],
					});

					await activitypub.inbox.announce({ body: activity });
					announces += 1;

					const exists = await db.isSortedSetMember(`pid:${topicData.mainPid}:announces`, id);
					assert(exists);
				});

				it('should NOT increment announces counter when a remote category shares', async () => {
					const { id } = helpers.mocks.group();
					const { activity } = helpers.mocks.announce({
						actor: id,
						object: localNote,
						cc: [`${nconf.get('url')}/uid/${topicData.uid}`],
					});

					await activitypub.inbox.announce({ body: activity });

					const count = await posts.getPostField(topicData.mainPid, 'announces');
					assert.strictEqual(count, announces);
				});

				it('should NOT contain the remote category announcer id in the post announces zset', async () => {
					const { id } = helpers.mocks.group();
					const { activity } = helpers.mocks.announce({
						actor: id,
						object: localNote,
						cc: [`${nconf.get('url')}/uid/${topicData.uid}`],
					});

					await activitypub.inbox.announce({ body: activity });

					const exists = await db.isSortedSetMember(`pid:${topicData.mainPid}:announces`, id);
					assert(!exists);
				});
			});

			describe('(Note)', () => {
				it('should create a new topic in cid -1 if category not addressed', async () => {
					const { note } = helpers.mocks.note();
					await activitypub.actors.assert([note.attributedTo]);
					const { activity } = helpers.mocks.announce({
						object: note,
					});
					const uid = await user.create({ username: utils.generateUUID().slice(0, 10) });
					await db.sortedSetAdd(`followersRemote:${activity.actor}`, Date.now(), uid);

					const beforeCount = await db.sortedSetCard(`cid:-1:tids`);
					await activitypub.inbox.announce({ body: activity });
					const count = await db.sortedSetCard(`cid:-1:tids`);

					assert.strictEqual(count, beforeCount + 1);
				});

				it('should create a new topic in local category', async () => {
					const { note } = helpers.mocks.note({
						cc: [`${nconf.get('url')}/category/${cid}`],
					});
					await activitypub.actors.assert([note.attributedTo]);
					const { activity } = helpers.mocks.announce({
						object: note,
					});
					const uid = await user.create({ username: utils.generateUUID().slice(0, 10) });
					await db.sortedSetAdd(`followersRemote:${activity.actor}`, Date.now(), uid);

					const beforeCount = await db.sortedSetCard(`cid:${cid}:tids`);
					await activitypub.inbox.announce({ body: activity });
					const count = await db.sortedSetCard(`cid:${cid}:tids`);

					assert.strictEqual(count, beforeCount + 1);
				});
			});

			describe('(Like)', () => {
				it('should upvote a local post', async () => {
					const uid = await user.create({ username: utils.generateUUID().slice(0, 10) });
					const { postData } = await topics.post({
						cid,
						uid,
						title: utils.generateUUID(),
						content: utils.generateUUID(),
					});

					const { activity: like } = helpers.mocks.like({
						object: `${nconf.get('url')}/post/${postData.pid}`,
					});
					const { activity } = helpers.mocks.announce({
						object: like,
					});

					let { upvotes } = await posts.getPostFields(postData.pid, 'upvotes');
					assert.strictEqual(upvotes, 0);

					await activitypub.inbox.announce({ body: activity });
					({ upvotes } = await posts.getPostFields(postData.pid, 'upvotes'));
					assert.strictEqual(upvotes, 1);
				});

				it('should upvote an asserted remote post', async () => {
					const { id } = helpers.mocks.note();
					await activitypub.notes.assert(0, [id], { skipChecks: true });
					const { activity: like } = helpers.mocks.like({
						object: id,
					});
					const { activity } = helpers.mocks.announce({
						object: like,
					});

					let { upvotes } = await posts.getPostFields(id, 'upvotes');
					assert.strictEqual(upvotes, 0);

					await activitypub.inbox.announce({ body: activity });

					({ upvotes } = await posts.getPostFields(id, 'upvotes'));
					assert.strictEqual(upvotes, 1);
				});
			});

			describe('(Update)', () => {
				it('should update a note\'s content', async () => {
					const { id: actor } = helpers.mocks.person();
					const { id, note } = helpers.mocks.note({ attributedTo: actor });
					await activitypub.notes.assert(0, [id], { skipChecks: true });
					note.content = utils.generateUUID();
					const { activity: update } = helpers.mocks.update({ object: note });
					const { activity } = helpers.mocks.announce({ object: update });

					await activitypub.inbox.announce({ body: activity });

					const content = await posts.getPostField(id, 'content');
					assert.strictEqual(content, note.content);
				});
			});
		});
	});

	describe('Inbox Synchronization', () => {
		let cid;
		let uid;
		let topicData;

		before(async () => {
			({ cid } = await categories.create({ name: utils.generateUUID().slice(0, 8) }));
		});

		beforeEach(async () => {
			uid = await user.create({ username: utils.generateUUID().slice(0, 10) });
			({ topicData } = await topics.post({
				cid,
				uid,
				title: utils.generateUUID(),
				content: utils.generateUUID(),
			}));
		});

		it('should add a topic to a user\'s inbox if user is a recipient in OP', async () => {
			await db.setAdd(`post:${topicData.mainPid}:recipients`, [uid]);
			await activitypub.notes.syncUserInboxes(topicData.tid);
			const inboxed = await db.isSortedSetMember(`uid:${uid}:inbox`, topicData.tid);

			assert.strictEqual(inboxed, true);
		});

		it('should add a topic to a user\'s inbox if a user is a recipient in a reply', async () => {
			const uid = await user.create({ username: utils.generateUUID().slice(0, 10) });
			const { pid } = await topics.reply({
				tid: topicData.tid,
				uid,
				content: utils.generateUUID(),
			});
			await db.setAdd(`post:${pid}:recipients`, [uid]);
			await activitypub.notes.syncUserInboxes(topicData.tid);
			const inboxed = await db.isSortedSetMember(`uid:${uid}:inbox`, topicData.tid);

			assert.strictEqual(inboxed, true);
		});

		it('should maintain a list of recipients at the topic level', async () => {
			await db.setAdd(`post:${topicData.mainPid}:recipients`, [uid]);
			await activitypub.notes.syncUserInboxes(topicData.tid);
			const [isRecipient, count] = await Promise.all([
				db.isSetMember(`tid:${topicData.tid}:recipients`, uid),
				db.setCount(`tid:${topicData.tid}:recipients`),
			]);

			assert(isRecipient);
			assert.strictEqual(count, 1);
		});

		it('should add topic to a user\'s inbox if it is explicitly passed in as an argument', async () => {
			await activitypub.notes.syncUserInboxes(topicData.tid, uid);
			const inboxed = await db.isSortedSetMember(`uid:${uid}:inbox`, topicData.tid);

			assert.strictEqual(inboxed, true);
		});

		it('should remove a topic from a user\'s inbox if that user is no longer a recipient in any contained posts', async () => {
			await activitypub.notes.syncUserInboxes(topicData.tid, uid);
			await activitypub.notes.syncUserInboxes(topicData.tid);
			const inboxed = await db.isSortedSetMember(`uid:${uid}:inbox`, topicData.tid);

			assert.strictEqual(inboxed, false);
		});
	});

	describe('Deletion', () => {
		let cid;
		let uid;
		let topicData;

		before(async () => {
			({ cid } = await categories.create({ name: utils.generateUUID().slice(0, 8) }));
		});

		beforeEach(async () => {
			uid = await user.create({ username: utils.generateUUID().slice(0, 10) });
			({ topicData } = await topics.post({
				cid,
				uid,
				title: utils.generateUUID(),
				content: utils.generateUUID(),
			}));
		});

		it('should clean up recipient sets for the post', async () => {
			const { pid } = await topics.reply({
				pid: `https://example.org/${utils.generateUUID().slice(0, 8)}`,
				tid: topicData.tid,
				uid,
				content: utils.generateUUID(),
			});
			await db.setAdd(`post:${pid}:recipients`, [uid]);
			await activitypub.notes.delete([pid]);

			const inboxed = await db.isSetMember(`post:${pid}:recipients`, uid);
			assert(!inboxed);
		});
	});
});