import { afterEach, beforeEach, describe, expect, test } from "vitest";
import { dbInsertUsers, dbReset } from "~/utils/Test";
import * as FriendRepository from "./FriendRepository.server";

const createFriendRequest = async ({
	senderId,
	receiverId,
}: {
	senderId: number;
	receiverId: number;
}) => {
	await FriendRepository.insertFriendRequest({ senderId, receiverId });
	const request = await FriendRepository.findFriendRequestBetween({
		senderId,
		receiverId,
	});
	return request!.id;
};

const createFriendship = async ({
	senderId,
	receiverId,
}: {
	senderId: number;
	receiverId: number;
}) => {
	const requestId = await createFriendRequest({ senderId, receiverId });
	await FriendRepository.insertFriendship({
		userOneId: senderId,
		userTwoId: receiverId,
		friendRequestId: requestId,
	});
};

describe("insertFriendRequest / findFriendRequestBetween", () => {
	beforeEach(async () => {
		await dbInsertUsers(3);
	});

	afterEach(() => {
		dbReset();
	});

	test("finds request from sender to receiver", async () => {
		await FriendRepository.insertFriendRequest({
			senderId: 1,
			receiverId: 2,
		});

		const result = await FriendRepository.findFriendRequestBetween({
			senderId: 1,
			receiverId: 2,
		});

		expect(result).toBeDefined();
		expect(result!.id).toBeTypeOf("number");
	});

	test("finds request in reverse direction", async () => {
		await FriendRepository.insertFriendRequest({
			senderId: 1,
			receiverId: 2,
		});

		const result = await FriendRepository.findFriendRequestBetween({
			senderId: 2,
			receiverId: 1,
		});

		expect(result).toBeDefined();
	});

	test("returns undefined for unrelated users", async () => {
		await FriendRepository.insertFriendRequest({
			senderId: 1,
			receiverId: 2,
		});

		const result = await FriendRepository.findFriendRequestBetween({
			senderId: 1,
			receiverId: 3,
		});

		expect(result).toBeUndefined();
	});
});

describe("findPendingSentRequests / findPendingReceivedRequests", () => {
	beforeEach(async () => {
		await dbInsertUsers(3);
	});

	afterEach(() => {
		dbReset();
	});

	test("sent request appears in sender's sent requests", async () => {
		await FriendRepository.insertFriendRequest({
			senderId: 1,
			receiverId: 2,
		});

		const result = await FriendRepository.findPendingSentRequests(1);

		expect(result).toHaveLength(1);
		expect(result[0].receiverId).toBe(2);
	});

	test("sent request appears in receiver's received requests", async () => {
		await FriendRepository.insertFriendRequest({
			senderId: 1,
			receiverId: 2,
		});

		const result = await FriendRepository.findPendingReceivedRequests(2);

		expect(result).toHaveLength(1);
		expect(result[0].senderId).toBe(1);
	});

	test("does not appear in wrong user's requests", async () => {
		await FriendRepository.insertFriendRequest({
			senderId: 1,
			receiverId: 2,
		});

		const sent = await FriendRepository.findPendingSentRequests(3);
		const received = await FriendRepository.findPendingReceivedRequests(3);

		expect(sent).toHaveLength(0);
		expect(received).toHaveLength(0);
	});
});

describe("countPendingSentRequests", () => {
	beforeEach(async () => {
		await dbInsertUsers(4);
	});

	afterEach(() => {
		dbReset();
	});

	test("returns 0 with no requests", async () => {
		const count = await FriendRepository.countPendingSentRequests(1);

		expect(count).toBe(0);
	});

	test("returns correct count after inserting multiple requests", async () => {
		await FriendRepository.insertFriendRequest({
			senderId: 1,
			receiverId: 2,
		});
		await FriendRepository.insertFriendRequest({
			senderId: 1,
			receiverId: 3,
		});
		await FriendRepository.insertFriendRequest({
			senderId: 1,
			receiverId: 4,
		});

		const count = await FriendRepository.countPendingSentRequests(1);

		expect(count).toBe(3);
	});
});

describe("deleteFriendRequest", () => {
	beforeEach(async () => {
		await dbInsertUsers(3);
	});

	afterEach(() => {
		dbReset();
	});

	test("deletes request by sender", async () => {
		const requestId = await createFriendRequest({
			senderId: 1,
			receiverId: 2,
		});

		await FriendRepository.deleteFriendRequest({ id: requestId, senderId: 1 });

		const result = await FriendRepository.findFriendRequestBetween({
			senderId: 1,
			receiverId: 2,
		});
		expect(result).toBeUndefined();
	});

	test("does not delete when wrong senderId is used", async () => {
		const requestId = await createFriendRequest({
			senderId: 1,
			receiverId: 2,
		});

		await FriendRepository.deleteFriendRequest({ id: requestId, senderId: 3 });

		const result = await FriendRepository.findFriendRequestBetween({
			senderId: 1,
			receiverId: 2,
		});
		expect(result).toBeDefined();
	});
});

describe("deleteFriendRequestByReceiver", () => {
	beforeEach(async () => {
		await dbInsertUsers(3);
	});

	afterEach(() => {
		dbReset();
	});

	test("deletes request by receiver", async () => {
		const requestId = await createFriendRequest({
			senderId: 1,
			receiverId: 2,
		});

		await FriendRepository.deleteFriendRequestByReceiver({
			id: requestId,
			receiverId: 2,
		});

		const result = await FriendRepository.findFriendRequestBetween({
			senderId: 1,
			receiverId: 2,
		});
		expect(result).toBeUndefined();
	});
});

describe("insertFriendship / findFriendship / findFriendIds", () => {
	beforeEach(async () => {
		await dbInsertUsers(3);
	});

	afterEach(() => {
		dbReset();
	});

	test("creates friendship and removes friend request", async () => {
		const requestId = await createFriendRequest({
			senderId: 2,
			receiverId: 1,
		});

		await FriendRepository.insertFriendship({
			userOneId: 2,
			userTwoId: 1,
			friendRequestId: requestId,
		});

		const friendship = await FriendRepository.findFriendship({
			userOneId: 1,
			userTwoId: 2,
		});
		expect(friendship).toBeDefined();

		const pendingRequest = await FriendRepository.findFriendRequestBetween({
			senderId: 2,
			receiverId: 1,
		});
		expect(pendingRequest).toBeUndefined();
	});

	test("normalizes IDs so userOneId < userTwoId", async () => {
		const requestId = await createFriendRequest({
			senderId: 3,
			receiverId: 1,
		});

		await FriendRepository.insertFriendship({
			userOneId: 3,
			userTwoId: 1,
			friendRequestId: requestId,
		});

		const friendship = await FriendRepository.findFriendship({
			userOneId: 1,
			userTwoId: 3,
		});
		expect(friendship).toBeDefined();
	});

	test("findFriendIds returns friend's ID", async () => {
		await createFriendship({ senderId: 1, receiverId: 2 });

		const friendIds = await FriendRepository.findFriendIds(1);

		expect(friendIds).toHaveLength(1);
		expect(friendIds).toContain(2);
	});

	test("findFriendIds returns friend ID from both sides", async () => {
		await createFriendship({ senderId: 1, receiverId: 2 });

		const friendIdsOfUser2 = await FriendRepository.findFriendIds(2);

		expect(friendIdsOfUser2).toHaveLength(1);
		expect(friendIdsOfUser2).toContain(1);
	});

	test("findFriendIds returns empty array with no friends", async () => {
		const friendIds = await FriendRepository.findFriendIds(1);

		expect(friendIds).toHaveLength(0);
	});
});

describe("deleteFriendship", () => {
	beforeEach(async () => {
		await dbInsertUsers(3);
	});

	afterEach(() => {
		dbReset();
	});

	test("removes friendship", async () => {
		await createFriendship({ senderId: 1, receiverId: 2 });

		const friendship = await FriendRepository.findFriendship({
			userOneId: 1,
			userTwoId: 2,
		});

		await FriendRepository.deleteFriendship({
			id: friendship!.id,
			userId: 1,
		});

		const result = await FriendRepository.findFriendship({
			userOneId: 1,
			userTwoId: 2,
		});
		expect(result).toBeUndefined();
	});

	test("does not delete friendship user is not part of", async () => {
		await createFriendship({ senderId: 1, receiverId: 2 });

		const friendship = await FriendRepository.findFriendship({
			userOneId: 1,
			userTwoId: 2,
		});

		await FriendRepository.deleteFriendship({
			id: friendship!.id,
			userId: 3,
		});

		const result = await FriendRepository.findFriendship({
			userOneId: 1,
			userTwoId: 2,
		});
		expect(result).toBeDefined();
	});
});

describe("findFriendRequestByIdAndReceiver", () => {
	beforeEach(async () => {
		await dbInsertUsers(3);
	});

	afterEach(() => {
		dbReset();
	});

	test("returns sender ID when request exists for receiver", async () => {
		const requestId = await createFriendRequest({
			senderId: 1,
			receiverId: 2,
		});

		const result = await FriendRepository.findFriendRequestByIdAndReceiver({
			id: requestId,
			receiverId: 2,
		});

		expect(result).toBeDefined();
		expect(result!.senderId).toBe(1);
	});

	test("returns undefined for wrong receiver", async () => {
		const requestId = await createFriendRequest({
			senderId: 1,
			receiverId: 2,
		});

		const result = await FriendRepository.findFriendRequestByIdAndReceiver({
			id: requestId,
			receiverId: 3,
		});

		expect(result).toBeUndefined();
	});
});

describe("findMutualFriends", () => {
	beforeEach(async () => {
		await dbInsertUsers(4);
	});

	afterEach(() => {
		dbReset();
	});

	test("returns mutual friend when two users share a common friend", async () => {
		await createFriendship({ senderId: 1, receiverId: 3 });
		await createFriendship({ senderId: 2, receiverId: 3 });

		const mutuals = await FriendRepository.findMutualFriends({
			loggedInUserId: 1,
			targetUserId: 2,
		});

		expect(mutuals).toHaveLength(1);
		expect(mutuals[0].id).toBe(3);
	});

	test("returns empty array when no common friends", async () => {
		await createFriendship({ senderId: 1, receiverId: 3 });
		await createFriendship({ senderId: 2, receiverId: 4 });

		const mutuals = await FriendRepository.findMutualFriends({
			loggedInUserId: 1,
			targetUserId: 2,
		});

		expect(mutuals).toHaveLength(0);
	});
});

describe("findByUserIdWithActivity", () => {
	beforeEach(async () => {
		await dbInsertUsers(3);
	});

	afterEach(() => {
		dbReset();
	});

	test("returns friends with friendshipId and createdAt", async () => {
		await createFriendship({ senderId: 1, receiverId: 2 });

		const result = await FriendRepository.findByUserIdWithActivity(1);

		const friendRow = result.find((r) => r.discordId === "1");
		expect(friendRow).toBeDefined();
		expect(friendRow!.friendshipId).toBeTypeOf("number");
		expect(friendRow!.friendshipCreatedAt).toBeTypeOf("number");
	});

	test("returns empty array when user has no friends or team members", async () => {
		const result = await FriendRepository.findByUserIdWithActivity(1);

		expect(result).toHaveLength(0);
	});
});