/**
 * Tests for util.ts
 * Tests database operations, reaction handling, and message serialization
 */

import { MessageReaction, User, Message, Attachment } from 'discord.js';
import {
    openDb,
    recordReaction,
    serializeMessageHistory,
    REAL_NAMES,
    LOSER_WHITELIST,
    parseRealNames,
    parseLoserWhitelist,
} from '../util';

// Mock discord.js
jest.mock('discord.js', () => {
    const actual = jest.requireActual('discord.js');
    return {
        ...actual,
        MessageReaction: jest.fn(),
        User: jest.fn(),
        Message: jest.fn(),
    };
});

// Mock sqlite
jest.mock('sqlite', () => ({
    open: jest.fn(() =>
        Promise.resolve({
            get: jest.fn(),
            run: jest.fn(),
            all: jest.fn(),
            close: jest.fn(),
        })
    ),
}));

jest.mock('sqlite3', () => ({
    Database: jest.fn(),
}));

describe('util.ts', () => {
    beforeAll(async () => {
        await openDb();
    });

    describe('parseRealNames', () => {
        it('should parse REAL_NAMES from environment variable', () => {
            const result = parseRealNames('user1:James,user2:Vincent,user3:Myles');
            expect(result).toEqual({
                user1: 'James',
                user2: 'Vincent',
                user3: 'Myles',
            });
        });

        it('should return empty object when input is empty', () => {
            const result = parseRealNames('');
            expect(result).toEqual({});
        });

        it('should handle whitespace in entries', () => {
            const result = parseRealNames('  user1:James  ,  user2:Vincent  ');
            expect(result).toEqual({
                user1: 'James',
                user2: 'Vincent',
            });
        });

        it('should skip malformed entries', () => {
            const result = parseRealNames('user1:James,invalidEntry,user2:Vincent');
            expect(result).toEqual({
                user1: 'James',
                user2: 'Vincent',
            });
        });
    });

    describe('parseLoserWhitelist', () => {
        it('should parse LOSER_WHITELIST from environment variable', () => {
            const result = parseLoserWhitelist('James,Vincent,Myles,Sam');
            expect(result).toEqual(['James', 'Vincent', 'Myles', 'Sam']);
        });

        it('should return empty array when input is empty', () => {
            const result = parseLoserWhitelist('');
            expect(result).toEqual([]);
        });

        it('should handle whitespace in entries', () => {
            const result = parseLoserWhitelist('  James  ,  Vincent  ,  Myles  ');
            expect(result).toEqual(['James', 'Vincent', 'Myles']);
        });
    });

    describe('REAL_NAMES', () => {
        it('should contain expected username mappings', () => {
            expect(REAL_NAMES.vinso1445).toBe('Vincent');
            expect(REAL_NAMES.scoliono).toBe('James');
            expect(REAL_NAMES.gnuwu).toBe('David');
        });

        it('should include Hatsune Miku', () => {
            expect(REAL_NAMES['Hatsune Miku']).toBe('Hatsune Miku');
        });
    });

    describe('LOSER_WHITELIST', () => {
        it('should contain the whitelisted first names', () => {
            expect(LOSER_WHITELIST).toContain('James');
            expect(LOSER_WHITELIST).toContain('Vincent');
            expect(LOSER_WHITELIST).toContain('Myles');
            expect(LOSER_WHITELIST).toContain('Sam');
        });

        it('should not contain non-whitelisted names', () => {
            expect(LOSER_WHITELIST).not.toContain('David');
            expect(LOSER_WHITELIST).not.toContain('Adam');
            expect(LOSER_WHITELIST).not.toContain('Jake');
        });
    });

    describe('serializeMessageHistory', () => {
        it('should return undefined for messages without content', async () => {
            const mockMessage = {
                cleanContent: '',
                createdAt: new Date(),
                author: { username: 'testuser' },
                type: 0,
                reactions: { cache: new Map() },
            } as unknown as Message;

            const result = await serializeMessageHistory(mockMessage);
            expect(result).toBeUndefined();
        });

        it('should serialize a valid message with content', async () => {
            const mockDate = new Date('2024-01-01T00:00:00Z');
            const mockMessage = {
                cleanContent: 'Hello, world!',
                createdAt: mockDate,
                author: { username: 'testuser' },
                type: 0,
                reactions: { cache: new Map() },
            } as unknown as Message;

            const result = await serializeMessageHistory(mockMessage);

            expect(result).toBeDefined();
            expect(result?.content).toBe('Hello, world!');
            expect(result?.author).toBe('testuser');
            expect(result?.timestamp).toBe(mockDate.toUTCString());
        });

        it('should include real name if available', async () => {
            const mockMessage = {
                cleanContent: 'Test message',
                createdAt: new Date(),
                author: { username: 'vinso1445' },
                type: 0,
                reactions: { cache: new Map() },
            } as unknown as Message;

            const result = await serializeMessageHistory(mockMessage);

            expect(result?.name).toBe('Vincent');
        });

        it('should serialize reactions', async () => {
            const mockReaction = {
                emoji: { name: '👍' },
                count: 5,
            };
            const mockMessage = {
                cleanContent: 'Test',
                createdAt: new Date(),
                author: { username: 'testuser' },
                type: 0,
                reactions: {
                    cache: new Map([['reaction1', mockReaction]]),
                },
            } as unknown as Message;

            const result = await serializeMessageHistory(mockMessage);

            expect(result?.reactions).toBeDefined();
            expect(result?.reactions).toContain(':+1:');
            expect(result?.reactions).toContain('(5)');
        });
    });
});