'use strict';
/*global require, after, before*/

var	async = require('async'),
	assert = require('assert'),
	db = require('../mocks/databasemock');

describe('Set methods', function() {

	describe('setAdd()', function() {
		it('should add to a set', function(done) {
			db.setAdd('testSet1', 5, function(err) {
				assert.equal(err, null);
				assert.equal(arguments.length, 1);
				done();
			});
		});

		it('should add an array to a set', function(done) {
			db.setAdd('testSet1', [1, 2, 3, 4], function(err) {
				assert.equal(err, null);
				assert.equal(arguments.length, 1);
				done();
			});
		});
	});

	describe('getSetMembers()', function() {
		before(function(done) {
			db.setAdd('testSet2', [1,2,3,4,5], done);
		});

		it('should return an empty set', function(done) {
			db.getSetMembers('doesnotexist', function(err, set) {
				assert.equal(err, null);
				assert.equal(arguments.length, 2);
				assert.equal(Array.isArray(set), true);
				assert.equal(set.length, 0);
				done();
			});
		});

		it('should return a set with all elements', function(done) {
			db.getSetMembers('testSet2', function(err, set) {
				assert.equal(err, null);
				assert.equal(set.length, 5);
				set.forEach(function(value) {
					assert.notEqual(['1', '2', '3', '4', '5'].indexOf(value), -1);
				});

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

	describe('setsAdd()', function() {
		it('should add to multiple sets', function(done) {
			db.setsAdd(['set1', 'set2'], 'value', function(err) {
				assert.equal(err, null);
				assert.equal(arguments.length, 1);
				done();
			});
		});
	});

	describe('getSetsMembers()', function() {
		before(function(done) {
			db.setsAdd(['set3', 'set4'], 'value', done);
		});

		it('should return members of two sets', function(done) {
			db.getSetsMembers(['set3', 'set4'], function(err, sets) {
				assert.equal(err, null);
				assert.equal(Array.isArray(sets), true);
				assert.equal(arguments.length, 2);
				assert.equal(Array.isArray(sets[0]) && Array.isArray(sets[1]), true);
				assert.strictEqual(sets[0][0], 'value');
				assert.strictEqual(sets[1][0], 'value');
				done();
			});
		});
	});

	describe('isSetMember()', function() {
		before(function(done) {
			db.setAdd('testSet3', 5, done);
		});

		it('should return false if element is not member of set', function(done) {
			db.isSetMember('testSet3', 10, function(err, isMember) {
				assert.equal(err, null);
				assert.equal(arguments.length, 2);
				assert.equal(isMember, false);
				done();
			});
		});

		it('should return true if element is a member of set', function(done) {
			db.isSetMember('testSet3', 5, function(err, isMember) {
				assert.equal(err, null);
				assert.equal(arguments.length, 2);
				assert.equal(isMember, true);
				done();
			});
		});
	});

	describe('isSetMembers()', function() {
		before(function(done) {
			db.setAdd('testSet4', [1, 2, 3, 4, 5], done);
		});

		it('should return an array of booleans', function(done) {
			db.isSetMembers('testSet4', ['1', '2', '10', '3'], function(err, members) {
				assert.equal(err, null);
				assert.equal(arguments.length, 2);
				assert.equal(Array.isArray(members), true);
				assert.deepEqual(members, [true, true, false, true]);
				done();
			});
		});
	});

	describe('isMemberOfSets()', function() {
		before(function(done) {
			db.setsAdd(['set1', 'set2'], 'value', done);
		});

		it('should return an array of booleans', function(done) {
			db.isMemberOfSets(['set1', 'testSet1', 'set2', 'doesnotexist'], 'value', function(err, members) {
				assert.equal(err, null);
				assert.equal(arguments.length, 2);
				assert.equal(Array.isArray(members), true);
				assert.deepEqual(members, [true, false, true, false]);
				done();
			});
		});
	});

	describe('setCount()', function() {
		before(function(done) {
			db.setAdd('testSet5', [1,2,3,4,5], done);
		});

		it('should return the element count of set', function(done) {
			db.setCount('testSet5', function(err, count) {
				assert.equal(err, null);
				assert.equal(arguments.length, 2);
				assert.strictEqual(count, 5);
				done();
			});
		});
	});

	describe('setsCount()', function() {
		before(function(done) {
			async.parallel([
				async.apply(db.setAdd, 'set5', [1,2,3,4,5]),
				async.apply(db.setAdd, 'set6', 1),
				async.apply(db.setAdd, 'set7', 2)
			], done);
		});

		it('should return the element count of sets', function(done) {
			db.setsCount(['set5', 'set6', 'set7', 'doesnotexist'], function(err, counts) {
				assert.equal(err, null);
				assert.equal(arguments.length, 2);
				assert.equal(Array.isArray(counts), true);
				assert.deepEqual(counts, [5, 1, 1, 0]);
				done();
			});
		});
	});

	describe('setRemove()', function() {
		before(function(done) {
			db.setAdd('testSet6', [1, 2], done);
		});

		it('should remove a element from set', function(done) {
			db.setRemove('testSet6', '2', function(err) {
				assert.equal(err, null);
				assert.equal(arguments.length, 1);

				db.isSetMember('testSet6', '2', function(err, isMember) {
					assert.equal(err, null);
					assert.equal(isMember, false);
					done();
				});
			});
		});
	});

	describe('setsRemove()', function() {
		before(function(done) {
			db.setsAdd(['set1', 'set2'], 'value', done);
		});

		it('should remove a element from multiple sets', function(done) {
			db.setsRemove(['set1', 'set2'], 'value', function(err) {
				assert.equal(err, null);
				assert.equal(arguments.length, 1);
				db.isMemberOfSets(['set1', 'set2'], 'value', function(err, members) {
					assert.equal(err, null);
					assert.deepEqual(members, [false, false]);
					done();
				});
			});
		});
	});

	describe('setRemoveRandom()', function() {
		before(function(done) {
			db.setAdd('testSet7', [1,2,3,4,5], done);
		});

		it('should remove a random element from set', function(done) {
			db.setRemoveRandom('testSet7', function(err, element) {
				assert.equal(err, null);
				assert.equal(arguments.length, 2);

				db.isSetMember('testSet', element, function(err, ismember) {
					assert.equal(err, null);
					assert.equal(ismember, false);
					done();
				});
			});
		});
	});


	after(function(done) {
		db.flushdb(done);
	});
});
