import { RedisService } from '../../../src/Application/Services/RedisService';
import { logStartup, logError } from '../../../src/Application/Services/Logger';

describe('RedisService', () => {
    let redisService: RedisService;

    beforeAll(async () => {
        redisService = RedisService.getInstance();
        
        try {
            await redisService.connect();
        } catch (error) {
            console.log('Redis not available for testing, skipping Redis tests');
            return;
        }
    });

    afterAll(async () => {
        if (redisService.isRedisConnected()) {
            await redisService.disconnect();
        }
    });

    beforeEach(async () => {
        // Skip tests if Redis is not connected
        if (!redisService.isRedisConnected()) {
            return;
        }
        
        // Clean up test data
        const activeChats = await redisService.getAllActiveChats();
        for (const chat of activeChats) {
            if (chat.chatId.startsWith('test-')) {
                await redisService.removeActiveChat(chat.chatId);
            }
        }
        
        await redisService.removeActiveUser('test-user-1');
        await redisService.removeActiveUser('test-user-2');
    });

    describe('Active Chat Management', () => {
        it('should store and retrieve active chats', async () => {
            if (!redisService.isRedisConnected()) {
                return;
            }

            const testChatData = {
                chatId: 'test-chat-1',
                participants: ['user-1', 'user-2'],
                lastActivity: new Date(),
                messageCount: 5,
                chatType: 'direct' as const,
                name: 'Test Chat'
            };

            await redisService.setActiveChat('test-chat-1', testChatData);
            const retrieved = await redisService.getActiveChat('test-chat-1');

            expect(retrieved).toBeDefined();
            expect(retrieved!.chatId).toBe('test-chat-1');
            expect(retrieved!.participants).toEqual(['user-1', 'user-2']);
            expect(retrieved!.messageCount).toBe(5);
            expect(retrieved!.chatType).toBe('direct');
            expect(retrieved!.name).toBe('Test Chat');
        });

        it('should return null for non-existent chat', async () => {
            if (!redisService.isRedisConnected()) {
                return;
            }

            const retrieved = await redisService.getActiveChat('non-existent-chat');
            expect(retrieved).toBeNull();
        });

        it('should remove active chats', async () => {
            if (!redisService.isRedisConnected()) {
                return;
            }

            const testChatData = {
                chatId: 'test-chat-2',
                participants: ['user-1', 'user-2'],
                lastActivity: new Date(),
                messageCount: 0,
                chatType: 'group' as const
            };

            await redisService.setActiveChat('test-chat-2', testChatData);
            let retrieved = await redisService.getActiveChat('test-chat-2');
            expect(retrieved).toBeDefined();

            await redisService.removeActiveChat('test-chat-2');
            retrieved = await redisService.getActiveChat('test-chat-2');
            expect(retrieved).toBeNull();
        });

        it('should update chat activity', async () => {
            if (!redisService.isRedisConnected()) {
                return;
            }

            const originalTime = new Date(Date.now() - 60000); // 1 minute ago
            const testChatData = {
                chatId: 'test-chat-3',
                participants: ['user-1', 'user-2'],
                lastActivity: originalTime,
                messageCount: 5,
                chatType: 'direct' as const
            };

            await redisService.setActiveChat('test-chat-3', testChatData);
            
            // Wait a bit to ensure timestamp difference
            await new Promise(resolve => setTimeout(resolve, 10));
            
            await redisService.updateChatActivity('test-chat-3', 6);
            
            const retrieved = await redisService.getActiveChat('test-chat-3');
            expect(retrieved).toBeDefined();
            expect(retrieved!.messageCount).toBe(6);
            expect(retrieved!.lastActivity.getTime()).toBeGreaterThan(originalTime.getTime());
        });
    });

    describe('Active User Management', () => {
        it('should store and retrieve active users', async () => {
            if (!redisService.isRedisConnected()) {
                return;
            }

            const testUserData = {
                userId: 'test-user-1',
                activeChatIds: ['chat-1', 'chat-2'],
                lastActivity: new Date(),
                isOnline: true
            };

            await redisService.setActiveUser('test-user-1', testUserData);
            const retrieved = await redisService.getActiveUser('test-user-1');

            expect(retrieved).toBeDefined();
            expect(retrieved!.userId).toBe('test-user-1');
            expect(retrieved!.activeChatIds).toEqual(['chat-1', 'chat-2']);
            expect(retrieved!.isOnline).toBe(true);
        });

        it('should manage user-chat associations', async () => {
            if (!redisService.isRedisConnected()) {
                return;
            }

            // Add user to chats
            await redisService.addUserToChat('test-user-2', 'chat-1');
            await redisService.addUserToChat('test-user-2', 'chat-2');

            let activeChatIds = await redisService.getUserActiveChats('test-user-2');
            expect(activeChatIds).toContain('chat-1');
            expect(activeChatIds).toContain('chat-2');

            // Remove user from one chat
            await redisService.removeUserFromChat('test-user-2', 'chat-1');
            activeChatIds = await redisService.getUserActiveChats('test-user-2');
            expect(activeChatIds).not.toContain('chat-1');
            expect(activeChatIds).toContain('chat-2');
        });
    });

    describe('Inactive Chat Cleanup', () => {
        it('should identify inactive chats', async () => {
            if (!redisService.isRedisConnected()) {
                return;
            }

            const oldTime = new Date(Date.now() - 2 * 60 * 60 * 1000); // 2 hours ago
            const recentTime = new Date();

            // Create an inactive chat
            await redisService.setActiveChat('test-inactive-chat', {
                chatId: 'test-inactive-chat',
                participants: ['user-1', 'user-2'],
                lastActivity: oldTime,
                messageCount: 3,
                chatType: 'direct'
            });

            // Create an active chat
            await redisService.setActiveChat('test-active-chat', {
                chatId: 'test-active-chat',
                participants: ['user-1', 'user-3'],
                lastActivity: recentTime,
                messageCount: 1,
                chatType: 'direct'
            });

            const inactiveChats = await redisService.getInactiveChats(60); // 60 minutes
            expect(inactiveChats).toContain('test-inactive-chat');
            expect(inactiveChats).not.toContain('test-active-chat');

            // Cleanup
            await redisService.removeActiveChat('test-inactive-chat');
            await redisService.removeActiveChat('test-active-chat');
        });

        it('should cleanup inactive chats', async () => {
            if (!redisService.isRedisConnected()) {
                return;
            }

            const oldTime = new Date(Date.now() - 2 * 60 * 60 * 1000); // 2 hours ago

            await redisService.setActiveChat('test-cleanup-chat', {
                chatId: 'test-cleanup-chat',
                participants: ['user-1', 'user-2'],
                lastActivity: oldTime,
                messageCount: 0,
                chatType: 'direct'
            });

            const cleanedUp = await redisService.cleanupInactiveChats(60);
            expect(cleanedUp).toContain('test-cleanup-chat');

            // Verify chat was removed
            const retrieved = await redisService.getActiveChat('test-cleanup-chat');
            expect(retrieved).toBeNull();
        });
    });

    describe('Health Check', () => {
        it('should ping Redis successfully', async () => {
            if (!redisService.isRedisConnected()) {
                return;
            }

            const pingResult = await redisService.ping();
            expect(pingResult).toBe(true);
        });

        it('should report connection status', () => {
            const isConnected = redisService.isRedisConnected();
            expect(typeof isConnected).toBe('boolean');
        });
    });
});