'use strict';

const assert = require('assert');
const async = require('async');
const util = require('util');

const sleep = util.promisify(setTimeout);

const db = require('./mocks/databasemock');
const Flags = require('../src/flags');
const Categories = require('../src/categories');
const Topics = require('../src/topics');
const Posts = require('../src/posts');
const User = require('../src/user');
const Groups = require('../src/groups');
const Meta = require('../src/meta');
const Privileges = require('../src/privileges');

describe('Flags', () => {
	let uid1;
	let adminUid;
	let uid3;
	let category;
	before(async () => {
		// Create some stuff to flag
		uid1 = await User.create({ username: 'testUser', password: 'abcdef', email: 'b@c.com' });

		adminUid = await User.create({ username: 'testUser2', password: 'abcdef', email: 'c@d.com' });
		await Groups.join('administrators', adminUid);

		category = await Categories.create({
			name: 'test category',
		});
		await Topics.post({
			cid: category.cid,
			uid: uid1,
			title: 'Topic to flag',
			content: 'This is flaggable content',
		});

		uid3 = await User.create({
			username: 'unprivileged', password: 'abcdef', email: 'd@e.com',
		});
	});

	describe('.create()', () => {
		it('should create a flag and return its data', (done) => {
			Flags.create('post', 1, 1, 'Test flag', (err, flagData) => {
				assert.ifError(err);
				const compare = {
					flagId: 1,
					targetId: 1,
					type: 'post',
					state: 'open',
					target_readable: 'Post 1',
				};
				assert(flagData);
				for (const key of Object.keys(compare)) {
					assert.ok(flagData[key], `undefined key ${key}`);
					assert.equal(flagData[key], compare[key]);
				}

				done();
			});
		});

		it('should add the flag to the byCid zset for category 1 if it is of type post', (done) => {
			db.isSortedSetMember(`flags:byCid:${1}`, 1, (err, isMember) => {
				assert.ifError(err);
				assert.ok(isMember);
				done();
			});
		});

		it('should add the flag to the byPid zset for pid 1 if it is of type post', (done) => {
			db.isSortedSetMember(`flags:byPid:${1}`, 1, (err, isMember) => {
				assert.ifError(err);
				assert.ok(isMember);
				done();
			});
		});
	});

	describe('.exists()', () => {
		it('should return Boolean True if a flag matching the flag hash already exists', (done) => {
			Flags.exists('post', 1, 1, (err, exists) => {
				assert.ifError(err);
				assert.strictEqual(true, exists);
				done();
			});
		});

		it('should return Boolean False if a flag matching the flag hash does not already exists', (done) => {
			Flags.exists('post', 1, 2, (err, exists) => {
				assert.ifError(err);
				assert.strictEqual(false, exists);
				done();
			});
		});
	});

	describe('.targetExists()', () => {
		it('should return Boolean True if the targeted element exists', (done) => {
			Flags.targetExists('post', 1, (err, exists) => {
				assert.ifError(err);
				assert.strictEqual(true, exists);
				done();
			});
		});

		it('should return Boolean False if the targeted element does not exist', (done) => {
			Flags.targetExists('post', 15, (err, exists) => {
				assert.ifError(err);
				assert.strictEqual(false, exists);
				done();
			});
		});
	});

	describe('.get()', () => {
		it('should retrieve and display a flag\'s data', (done) => {
			Flags.get(1, (err, flagData) => {
				assert.ifError(err);
				const compare = {
					flagId: 1,
					targetId: 1,
					type: 'post',
					state: 'open',
					target_readable: 'Post 1',
				};
				assert(flagData);
				for (const key of Object.keys(compare)) {
					assert.ok(flagData[key], `undefined key ${key}`);
					assert.equal(flagData[key], compare[key]);
				}

				done();
			});
		});
	});

	describe('.list()', () => {
		it('should show a list of flags (with one item)', (done) => {
			Flags.list({
				filters: {},
				uid: 1,
			}, (err, payload) => {
				assert.ifError(err);
				assert.ok(payload.hasOwnProperty('flags'));
				assert.ok(payload.hasOwnProperty('page'));
				assert.ok(payload.hasOwnProperty('pageCount'));
				assert.ok(Array.isArray(payload.flags));
				assert.equal(payload.flags.length, 1);

				Flags.get(payload.flags[0].flagId, (err, flagData) => {
					assert.ifError(err);
					assert.equal(payload.flags[0].flagId, flagData.flagId);
					assert.equal(payload.flags[0].description, flagData.description);
					done();
				});
			});
		});

		describe('(with filters)', () => {
			it('should return a filtered list of flags if said filters are passed in', (done) => {
				Flags.list({
					filters: {
						state: 'open',
					},
					uid: 1,
				}, (err, payload) => {
					assert.ifError(err);
					assert.ok(payload.hasOwnProperty('flags'));
					assert.ok(payload.hasOwnProperty('page'));
					assert.ok(payload.hasOwnProperty('pageCount'));
					assert.ok(Array.isArray(payload.flags));
					assert.strictEqual(1, parseInt(payload.flags[0].flagId, 10));
					done();
				});
			});

			it('should return no flags if a filter with no matching flags is used', (done) => {
				Flags.list({
					filters: {
						state: 'rejected',
					},
					uid: 1,
				}, (err, payload) => {
					assert.ifError(err);
					assert.ok(payload.hasOwnProperty('flags'));
					assert.ok(payload.hasOwnProperty('page'));
					assert.ok(payload.hasOwnProperty('pageCount'));
					assert.ok(Array.isArray(payload.flags));
					assert.strictEqual(0, payload.flags.length);
					done();
				});
			});

			it('should return a flag when filtered by cid 1', (done) => {
				Flags.list({
					filters: {
						cid: 1,
					},
					uid: 1,
				}, (err, payload) => {
					assert.ifError(err);
					assert.ok(payload.hasOwnProperty('flags'));
					assert.ok(payload.hasOwnProperty('page'));
					assert.ok(payload.hasOwnProperty('pageCount'));
					assert.ok(Array.isArray(payload.flags));
					assert.strictEqual(1, payload.flags.length);
					done();
				});
			});

			it('shouldn\'t return a flag when filtered by cid 2', (done) => {
				Flags.list({
					filters: {
						cid: 2,
					},
					uid: 1,
				}, (err, payload) => {
					assert.ifError(err);
					assert.ok(payload.hasOwnProperty('flags'));
					assert.ok(payload.hasOwnProperty('page'));
					assert.ok(payload.hasOwnProperty('pageCount'));
					assert.ok(Array.isArray(payload.flags));
					assert.strictEqual(0, payload.flags.length);
					done();
				});
			});

			it('should return a flag when filtered by both cid 1 and 2', (done) => {
				Flags.list({
					filters: {
						cid: [1, 2],
					},
					uid: 1,
				}, (err, payload) => {
					assert.ifError(err);
					assert.ok(payload.hasOwnProperty('flags'));
					assert.ok(payload.hasOwnProperty('page'));
					assert.ok(payload.hasOwnProperty('pageCount'));
					assert.ok(Array.isArray(payload.flags));
					assert.strictEqual(1, payload.flags.length);
					done();
				});
			});

			it('should return one flag if filtered by both cid 1 and 2 and open state', (done) => {
				Flags.list({
					filters: {
						cid: [1, 2],
						state: 'open',
					},
					uid: 1,
				}, (err, payload) => {
					assert.ifError(err);
					assert.ok(payload.hasOwnProperty('flags'));
					assert.ok(payload.hasOwnProperty('page'));
					assert.ok(payload.hasOwnProperty('pageCount'));
					assert.ok(Array.isArray(payload.flags));
					assert.strictEqual(1, payload.flags.length);
					done();
				});
			});

			it('should return no flag if filtered by both cid 1 and 2 and non-open state', (done) => {
				Flags.list({
					filters: {
						cid: [1, 2],
						state: 'resolved',
					},
					uid: 1,
				}, (err, payload) => {
					assert.ifError(err);
					assert.ok(payload.hasOwnProperty('flags'));
					assert.ok(payload.hasOwnProperty('page'));
					assert.ok(payload.hasOwnProperty('pageCount'));
					assert.ok(Array.isArray(payload.flags));
					assert.strictEqual(0, payload.flags.length);
					done();
				});
			});
		});

		describe('(with sort)', () => {
			before(async () => {
				// Create a second flag to test sorting
				const post = await Topics.reply({
					tid: 1,
					uid: uid1,
					content: 'this is a reply -- flag me',
				});
				await Flags.create('post', post.pid, adminUid, 'another flag');
				await Flags.create('post', 1, uid3, 'additional flag report');
			});

			it('should return sorted flags latest first if no sort is passed in', async () => {
				const payload = await Flags.list({
					uid: adminUid,
				});

				assert(payload.flags.every((cur, idx) => {
					if (idx === payload.flags.length - 1) {
						return true;
					}

					const next = payload.flags[idx + 1];
					return parseInt(cur.datetime, 10) > parseInt(next.datetime, 10);
				}));
			});

			it('should return sorted flags oldest first if "oldest" sort is passed in', async () => {
				const payload = await Flags.list({
					uid: adminUid,
					sort: 'oldest',
				});

				assert(payload.flags.every((cur, idx) => {
					if (idx === payload.flags.length - 1) {
						return true;
					}

					const next = payload.flags[idx + 1];
					return parseInt(cur.datetime, 10) < parseInt(next.datetime, 10);
				}));
			});

			it('should return flags with more reports first if "reports" sort is passed in', async () => {
				const payload = await Flags.list({
					uid: adminUid,
					sort: 'reports',
				});

				assert(payload.flags.every((cur, idx) => {
					if (idx === payload.flags.length - 1) {
						return true;
					}

					const next = payload.flags[idx + 1];
					return parseInt(cur.heat, 10) >= parseInt(next.heat, 10);
				}));
			});
		});
	});

	describe('.update()', () => {
		it('should alter a flag\'s various attributes and persist them to the database', (done) => {
			Flags.update(1, adminUid, {
				state: 'wip',
				assignee: adminUid,
			}, (err) => {
				assert.ifError(err);
				db.getObjectFields('flag:1', ['state', 'assignee'], (err, data) => {
					if (err) {
						throw err;
					}

					assert.strictEqual('wip', data.state);
					assert.ok(!isNaN(parseInt(data.assignee, 10)));
					assert.strictEqual(adminUid, parseInt(data.assignee, 10));
					done();
				});
			});
		});

		it('should persist to the flag\'s history', (done) => {
			Flags.getHistory(1, (err, history) => {
				if (err) {
					throw err;
				}

				history.forEach((change) => {
					switch (change.attribute) {
						case 'state':
							assert.strictEqual('[[flags:state-wip]]', change.value);
							break;

						case 'assignee':
							assert.strictEqual(1, change.value);
							break;
					}
				});

				done();
			});
		});

		it('should allow assignment if user is an admin and do nothing otherwise', async () => {
			await Flags.update(1, adminUid, {
				assignee: adminUid,
			});
			let assignee = await db.getObjectField('flag:1', 'assignee');
			assert.strictEqual(adminUid, parseInt(assignee, 10));

			await Flags.update(1, adminUid, {
				assignee: uid3,
			});
			assignee = await db.getObjectField('flag:1', 'assignee');
			assert.strictEqual(adminUid, parseInt(assignee, 10));
		});

		it('should allow assignment if user is a global mod and do nothing otherwise', async () => {
			await Groups.join('Global Moderators', uid3);

			await Flags.update(1, uid3, {
				assignee: uid3,
			});
			let assignee = await db.getObjectField('flag:1', 'assignee');
			assert.strictEqual(uid3, parseInt(assignee, 10));

			await Flags.update(1, uid3, {
				assignee: uid1,
			});
			assignee = await db.getObjectField('flag:1', 'assignee');
			assert.strictEqual(uid3, parseInt(assignee, 10));

			await Groups.leave('Global Moderators', uid3);
		});

		it('should allow assignment if user is a mod of the category, do nothing otherwise', async () => {
			await Groups.join(`cid:${category.cid}:privileges:moderate`, uid3);

			await Flags.update(1, uid3, {
				assignee: uid3,
			});
			let assignee = await db.getObjectField('flag:1', 'assignee');
			assert.strictEqual(uid3, parseInt(assignee, 10));

			await Flags.update(1, uid3, {
				assignee: uid1,
			});
			assignee = await db.getObjectField('flag:1', 'assignee');
			assert.strictEqual(uid3, parseInt(assignee, 10));

			await Groups.leave(`cid:${category.cid}:privileges:moderate`, uid3);
		});

		it('should do nothing when you attempt to set a bogus state', async () => {
			await Flags.update(1, adminUid, {
				state: 'hocus pocus',
			});

			const state = await db.getObjectField('flag:1', 'state');
			assert.strictEqual('wip', state);
		});

		it('should rescind notification if flag is resolved', async () => {
			const SocketFlags = require('../src/socket.io/flags.js');
			const result = await Topics.post({
				cid: category.cid,
				uid: uid3,
				title: 'Topic to flag',
				content: 'This is flaggable content',
			});
			const flagId = await SocketFlags.create({ uid: uid1 }, { type: 'post', id: result.postData.pid, reason: 'spam' });
			await sleep(2000);

			let userNotifs = await User.notifications.getAll(adminUid);
			assert(userNotifs.includes(`flag:post:${result.postData.pid}`));

			await Flags.update(flagId, adminUid, {
				state: 'resolved',
			});

			userNotifs = await User.notifications.getAll(adminUid);
			assert(!userNotifs.includes(`flag:post:${result.postData.pid}`));
		});
	});

	describe('.getTarget()', () => {
		it('should return a post\'s data if queried with type "post"', (done) => {
			Flags.getTarget('post', 1, 1, (err, data) => {
				assert.ifError(err);
				const compare = {
					uid: 1,
					pid: 1,
					content: 'This is flaggable content',
				};

				for (const key of Object.keys(compare)) {
					assert.ok(data[key]);
					assert.equal(data[key], compare[key]);
				}

				done();
			});
		});

		it('should return a user\'s data if queried with type "user"', (done) => {
			Flags.getTarget('user', 1, 1, (err, data) => {
				assert.ifError(err);
				const compare = {
					uid: 1,
					username: 'testUser',
					email: 'b@c.com',
				};

				for (const key of Object.keys(compare)) {
					assert.ok(data[key]);
					assert.equal(data[key], compare[key]);
				}

				done();
			});
		});

		it('should return a plain object with no properties if the target no longer exists', (done) => {
			Flags.getTarget('user', 15, 1, (err, data) => {
				assert.ifError(err);
				assert.strictEqual(0, Object.keys(data).length);
				done();
			});
		});
	});

	describe('.validate()', () => {
		it('should error out if type is post and post is deleted', (done) => {
			Posts.delete(1, 1, (err) => {
				if (err) {
					throw err;
				}

				Flags.validate({
					type: 'post',
					id: 1,
					uid: 1,
				}, (err) => {
					assert.ok(err);
					assert.strictEqual('[[error:post-deleted]]', err.message);
					Posts.restore(1, 1, done);
				});
			});
		});

		it('should not pass validation if flag threshold is set and user rep does not meet it', (done) => {
			Meta.configs.set('min:rep:flag', '50', (err) => {
				assert.ifError(err);

				Flags.validate({
					type: 'post',
					id: 1,
					uid: 3,
				}, (err) => {
					assert.ok(err);
					assert.strictEqual('[[error:not-enough-reputation-to-flag]]', err.message);
					Meta.configs.set('min:rep:flag', 0, done);
				});
			});
		});

		it('should not error if user blocked target', (done) => {
			const SocketFlags = require('../src/socket.io/flags.js');
			let reporterUid;
			let reporteeUid;
			async.waterfall([
				function (next) {
					User.create({ username: 'reporter' }, next);
				},
				function (uid, next) {
					reporterUid = uid;
					User.create({ username: 'reportee' }, next);
				},
				function (uid, next) {
					reporteeUid = uid;
					User.blocks.add(reporteeUid, reporterUid, next);
				},
				function (next) {
					Topics.post({
						cid: 1,
						uid: reporteeUid,
						title: 'Another topic',
						content: 'This is flaggable content',
					}, next);
				},
				function (data, next) {
					SocketFlags.create({ uid: reporterUid }, { type: 'post', id: data.postData.pid, reason: 'spam' }, next);
				},
			], done);
		});

		it('should send back error if reporter does not exist', (done) => {
			Flags.validate({ uid: 123123123, id: 1, type: 'post' }, (err) => {
				assert.equal(err.message, '[[error:no-user]]');
				done();
			});
		});
	});

	describe('.appendNote()', () => {
		it('should add a note to a flag', (done) => {
			Flags.appendNote(1, 1, 'this is my note', (err) => {
				assert.ifError(err);

				db.getSortedSetRange('flag:1:notes', 0, -1, (err, notes) => {
					if (err) {
						throw err;
					}

					assert.strictEqual('[1,"this is my note"]', notes[0]);
					setTimeout(done, 10);
				});
			});
		});

		it('should be a JSON string', (done) => {
			db.getSortedSetRange('flag:1:notes', 0, -1, (err, notes) => {
				if (err) {
					throw err;
				}

				try {
					JSON.parse(notes[0]);
				} catch (e) {
					assert.ifError(e);
				}

				done();
			});
		});
	});

	describe('.getNotes()', () => {
		before((done) => {
			// Add a second note
			Flags.appendNote(1, 1, 'this is the second note', done);
		});

		it('return should match a predefined spec', (done) => {
			Flags.getNotes(1, (err, notes) => {
				assert.ifError(err);
				const compare = {
					uid: 1,
					content: 'this is my note',
				};

				const data = notes[1];
				for (const key of Object.keys(compare)) {
					assert.ok(data[key]);
					assert.strictEqual(data[key], compare[key]);
				}

				done();
			});
		});

		it('should retrieve a list of notes, from newest to oldest', (done) => {
			Flags.getNotes(1, (err, notes) => {
				assert.ifError(err);
				assert(notes[0].datetime > notes[1].datetime, `${notes[0].datetime}-${notes[1].datetime}`);
				assert.strictEqual('this is the second note', notes[0].content);
				done();
			});
		});
	});

	describe('.appendHistory()', () => {
		let entries;
		before((done) => {
			db.sortedSetCard('flag:1:history', (err, count) => {
				entries = count;
				done(err);
			});
		});

		it('should add a new entry into a flag\'s history', (done) => {
			Flags.appendHistory(1, 1, {
				state: 'rejected',
			}, (err) => {
				assert.ifError(err);

				Flags.getHistory(1, (err, history) => {
					if (err) {
						throw err;
					}

					// 1 for the new event appended, 2 for username and email change
					assert.strictEqual(entries + 3, history.length);
					done();
				});
			});
		});
	});

	describe('.getHistory()', () => {
		it('should retrieve a flag\'s history', (done) => {
			Flags.getHistory(1, (err, history) => {
				assert.ifError(err);
				assert.strictEqual(history[0].fields.state, '[[flags:state-rejected]]');
				done();
			});
		});
	});

	describe('(websockets)', () => {
		const SocketFlags = require('../src/socket.io/flags.js');
		let pid;
		let tid;
		before((done) => {
			Topics.post({
				cid: 1,
				uid: 1,
				title: 'Another topic',
				content: 'This is flaggable content',
			}, (err, result) => {
				pid = result.postData.pid;
				tid = result.topicData.tid;
				done(err);
			});
		});

		describe('.create()', () => {
			it('should create a flag with no errors', (done) => {
				SocketFlags.create({ uid: 2 }, {
					type: 'post',
					id: pid,
					reason: 'foobar',
				}, (err) => {
					assert.ifError(err);

					Flags.exists('post', pid, 1, (err, exists) => {
						assert.ifError(err);
						assert(true);
						done();
					});
				});
			});

			it('should escape flag reason', async () => {
				const postData = await Topics.reply({
					tid: tid,
					uid: 1,
					content: 'This is flaggable content',
				});

				const flagId = await SocketFlags.create({ uid: 2 }, {
					type: 'post',
					id: postData.pid,
					reason: '"<script>alert(\'ok\');</script>',
				});

				const flagData = await Flags.get(flagId);
				assert.strictEqual(flagData.reports[0].value, '&quot;&lt;script&gt;alert(&#x27;ok&#x27;);&lt;&#x2F;script&gt;');
			});

			it('should not allow flagging post in private category', async () => {
				const category = await Categories.create({ name: 'private category' });

				await Privileges.categories.rescind(['groups:topics:read'], category.cid, 'registered-users');
				await Groups.join('private category', uid3);
				const result = await Topics.post({
					cid: category.cid,
					uid: uid3,
					title: 'private topic',
					content: 'private post',
				});
				try {
					await SocketFlags.create({ uid: uid3 }, { type: 'post', id: result.postData.pid, reason: 'foobar' });
				} catch (err) {
					assert.equal(err.message, '[[error:no-privileges]]');
				}
			});
		});

		describe('.update()', () => {
			it('should update a flag\'s properties', (done) => {
				SocketFlags.update({ uid: 2 }, {
					flagId: 2,
					data: [{
						name: 'state',
						value: 'wip',
					}],
				}, (err, history) => {
					assert.ifError(err);
					assert(Array.isArray(history));
					assert(history[0].fields.hasOwnProperty('state'));
					assert.strictEqual('[[flags:state-wip]]', history[0].fields.state);
					done();
				});
			});
		});

		describe('.appendNote()', () => {
			it('should append a note to the flag', (done) => {
				SocketFlags.appendNote({ uid: 2 }, {
					flagId: 2,
					note: 'lorem ipsum dolor sit amet',
				}, (err, data) => {
					assert.ifError(err);
					assert(data.hasOwnProperty('notes'));
					assert(Array.isArray(data.notes));
					assert.strictEqual('lorem ipsum dolor sit amet', data.notes[0].content);
					assert.strictEqual(2, data.notes[0].uid);

					assert(data.hasOwnProperty('history'));
					assert(Array.isArray(data.history));
					assert.strictEqual(1, Object.keys(data.history[0].fields).length);
					assert(data.history[0].fields.hasOwnProperty('notes'));
					done();
				});
			});
		});
	});
});
