describe("Zotero.FeedItem", function () {
	let feed, libraryID;
	before(function* () {
		feed = new Zotero.Feed({ name: 'Test ' + Zotero.randomString(), url: 'http://' + Zotero.randomString() + '.com/' });
		yield feed.saveTx();
		libraryID = feed.libraryID;
	});
	after(function() {
		return feed.eraseTx();
	});
	
	it("should be an instance of Zotero.Item", function() {
		assert.instanceOf(new Zotero.FeedItem(), Zotero.Item);
	});
	describe("#libraryID", function() {
		it("should reference a feed", function() {
			let feedItem = new Zotero.FeedItem();
			assert.doesNotThrow(function() {feedItem.libraryID = feed.libraryID});
			assert.throws(function() {feedItem.libraryID = Zotero.Libraries.userLibraryID}, /^libraryID must reference a feed$/);
		});
	});
	describe("#constructor()", function* () {
		it("should accept required fields as arguments", function* () {
			let guid = Zotero.randomString();
			let feedItem = new Zotero.FeedItem();
			yield assert.isRejected(feedItem.forceSaveTx());
			
			feedItem = new Zotero.FeedItem('book', { guid });
			feedItem.libraryID = libraryID;
			yield assert.isFulfilled(feedItem.forceSaveTx());
			
			assert.equal(feedItem.itemTypeID, Zotero.ItemTypes.getID('book'));
			assert.equal(feedItem.guid, guid);
			assert.equal(feedItem.libraryID, libraryID);
		});
	});
	describe("#isFeedItem", function() {
		it("should be true", function() {
			let feedItem = new Zotero.FeedItem();
			assert.isTrue(feedItem.isFeedItem);
		});
		it("should be falsy for regular item", function() {
			let item = new Zotero.Item();
			assert.notOk(item.isFeedItem);
		})
	});
	describe("#guid", function() {
		it("should not be settable to a non-string value", function() {
			let feedItem = new Zotero.FeedItem();
			assert.throws(() => feedItem.guid = 1);
		});
		it("should be settable to any string", function() {
			let feedItem = new Zotero.FeedItem();
			feedItem.guid = 'foo';
			assert.equal(feedItem.guid, 'foo');
		});
		it("should not be possible to change guid after saving item", function* () {
			let feedItem = yield createDataObject('feedItem', { libraryID });
			assert.throws(() => feedItem.guid = 'bar');
		});
	});
	describe("#isRead", function() {
		it("should be false by default", function* () {
			let feedItem = yield createDataObject('feedItem', { libraryID });
			assert.isFalse(feedItem.isRead);
		});
		it("should be settable and persist after saving", function* () {
			this.timeout(5000);
			let feedItem = new Zotero.FeedItem('book', { guid: Zotero.randomString() });
			feedItem.libraryID = feed.libraryID;
			assert.isFalse(feedItem.isRead);
			
			let expectedTimestamp = Date.now();
			feedItem.isRead = true;
			assert.isTrue(feedItem.isRead);
			let readTime = Zotero.Date.sqlToDate(feedItem._feedItemReadTime, true).getTime();
			assert.closeTo(readTime, expectedTimestamp, 2000, 'sets the read timestamp to current time');
			
			feedItem.isRead = false;
			assert.isFalse(feedItem.isRead);
			assert.notOk(feedItem._feedItemReadTime);
			
			expectedTimestamp = Date.now();
			feedItem.isRead = true;
			yield Zotero.Promise.delay(2001);
			yield feedItem.forceSaveTx();
			
			readTime = yield Zotero.DB.valueQueryAsync('SELECT readTime FROM feedItems WHERE itemID=?', feedItem.id);
			readTime = Zotero.Date.sqlToDate(readTime, true).getTime();
			assert.closeTo(readTime, expectedTimestamp, 2000, 'read timestamp is correct in the DB');
		});
	});
	describe("#save()", function() {
		it("should require edit check override", function* () {
			let feedItem = new Zotero.FeedItem('book', { guid: Zotero.randomString() });
			feedItem.libraryID = feed.libraryID;
			yield assert.isRejected(feedItem.saveTx(), /^Error: Cannot edit feedItem in read-only library/);
		});
		it("should require feed being set", function* () {
			let feedItem = new Zotero.FeedItem('book', { guid: Zotero.randomString() });
			// Defaults to user library ID
			yield assert.isRejected(feedItem.forceSaveTx(), /^Error: Cannot add /);
		});
		it("should require GUID being set", function* () {
			let feedItem = new Zotero.FeedItem('book');
			feedItem.libraryID = feed.libraryID;
			yield assert.isRejected(feedItem.forceSaveTx(),  /^Error: GUID must be set before saving FeedItem$/);
		});
		it("should require a unique GUID", function* () {
			let guid = Zotero.randomString();
			let feedItem1 = yield createDataObject('feedItem', { libraryID, guid });
			
			let feedItem2 = createUnsavedDataObject('feedItem', { libraryID, guid });
			yield assert.isRejected(feedItem2.forceSaveTx());
			
			// But we should be able to save it after deleting the original feed
			yield feedItem1.forceEraseTx();
			yield assert.isFulfilled(feedItem2.forceSaveTx());
		});
		it("should require item type being set", function* () {
			let feedItem = new Zotero.FeedItem(null, { guid: Zotero.randomString() });
			feedItem.libraryID = feed.libraryID;
			yield assert.isRejected(feedItem.forceSaveTx(),  /^Error: Item type must be set before saving$/);
		});
		it("should save feed item", function* () {
			let guid = Zotero.randomString();
			let feedItem = createUnsavedDataObject('feedItem', { libraryID, guid });
			yield assert.isFulfilled(feedItem.forceSaveTx());
			
			feedItem = yield Zotero.FeedItems.getAsync(feedItem.id);
			assert.ok(feedItem);
			assert.equal(feedItem.guid, guid);
		});
		it.skip("should support saving feed items with all types and fields", function* () {
			this.timeout(60000);
			let allTypesAndFields = loadSampleData('allTypesAndFields'),
				feedItems = [];
			for (let type in allTypesAndFields) {
				let feedItem = new Zotero.FeedItem(null, type, feed.libraryID);
				feedItem.fromJSON(allTypesAndFields[type]);
				
				yield feedItem.forceSaveTx();
				
				feedItems.push(feedItem);
			}
			
			let feedItemsJSON = {};
			for (let i=0; i<feedItems.length; i++) {
				let feed = feedItems[i];
				feedItemsJSON[feed.guid] = feed.toJSON();
			}
			
			assert.deepEqual(feedItemsJSON, allTypesAndFields);
		});
		it("should allow saving after editing data", function* () {
			let feedItem = yield createDataObject('feedItem', { libraryID });
			
			feedItem.setField('title', 'bar');
			yield assert.isFulfilled(feedItem.forceSaveTx());
			assert.equal(feedItem.getField('title'), 'bar');
		});
	});
	describe("#erase()", function() {
		it("should erase an existing feed item", function* () {
			let feedItem = yield createDataObject('feedItem', { libraryID });
			
			yield feedItem.forceEraseTx();
			assert.isFalse(yield Zotero.FeedItems.getAsync(feedItem.id));
			
			//yield assert.isRejected(feedItem.forceEraseTx(), "does not allow erasing twice");
		});
		it("should require edit check override to erase", function* () {
			let feedItem = yield createDataObject('feedItem', { libraryID });
			
			yield assert.isRejected(feedItem.eraseTx(), /^Error: Cannot edit feedItem in read-only library/);
		});
	});
});