const { PrismaClient: MSGClient } = require("../../prisma/clients/msg");
const logger = require("./logger.services.js");

const msgPrisma = new MSGClient();

class SocketService {
    constructor(io) {
        this.io = io;
        this.setupSocketHandlers();
    }

    setupSocketHandlers() {
        this.io.on('connection', (socket) => {
            logger.info(`New client connected: ${socket.id}`);

            socket.on('join_conversation', (data) => {
                this.handleJoinConversation(socket, data);
            });

            socket.on('send_message', async (data) => {
                await this.handleSendMessage(socket, data);
            });

            socket.on('typing_start', (data) => {
                this.handleTypingStart(socket, data);
            });

            socket.on('typing_stop', (data) => {
                this.handleTypingStop(socket, data);
            });

            socket.on('disconnect', () => {
                this.handleDisconnect(socket);
            });
        });
    }

    handleJoinConversation(socket, data) {
        const { conversationId, userId, userType } = data;
        socket.join(conversationId);
        socket.userId = userId;
        socket.userType = userType;
        logger.info(`${userType} ${userId} joined conversation ${conversationId}`);

        socket.to(conversationId).emit('user_joined', {
            userId,
            userType,
            message: `${userType} joined the conversation`
        });
    }

    async handleSendMessage(socket, data) {
        try {
            const { conversationId, message, senderId, senderType, messageType = 'text' } = data;

            const savedMessage = await this.saveMessageToDatabase({
                conversationId,
                message,
                senderId,
                senderType,
                messageType
            });

            this.io.to(conversationId).emit('receive_message', savedMessage);

            logger.info(`Message sent in conversation ${conversationId} by ${senderType} ${senderId}`);

        } catch (error) {
            logger.error('Error sending message:', error);
            socket.emit('message_error', {
                error: 'Failed to send message',
                details: error.message
            });
        }
    }

    handleTypingStart(socket, data) {
        const { conversationId, userId, userType } = data;
        socket.to(conversationId).emit('user_typing', { userId, userType });
    }

    handleTypingStop(socket, data) {
        const { conversationId, userId, userType } = data;
        socket.to(conversationId).emit('user_stopped_typing', { userId, userType });
    }

    handleDisconnect(socket) {
        logger.info(`Client disconnected: ${socket.id}`);

        if (socket.userId && socket.userType) {
            // You might want to emit to specific rooms the user was in
            // This would require tracking which rooms the user was in
        }
    }

    async saveMessageToDatabase(messageData) {
        try {
            const message = await msgPrisma.messages.create({
                data: {
                    conversationId: messageData.conversationId,
                    content: messageData.message,
                    messageType: messageData.messageType || 'text',
                    senderId: messageData.senderId,
                    senderType: messageData.senderType,
                    senderName: messageData.senderName,
                    status: 'sent',
                    metadata: messageData.metadata || {}
                },
                include: {
                    conversation: true
                }
            });

            await msgPrisma.conversations.update({
                where: { id: messageData.conversationId },
                data: { lastMessageAt: new Date() }
            });

            return {
                id: message.id,
                conversationId: message.conversationId,
                message: message.content,
                senderId: message.senderId,
                senderType: message.senderType,
                senderName: message.senderName,
                messageType: message.messageType,
                timestamp: message.createdAt.toISOString(),
                status: message.status
            };
        } catch (error) {
            logger.error('Error saving message to database:', error);
            throw error;
        }
    }

    sendMessageToConversation(conversationId, messageData) {
        this.io.to(conversationId).emit('receive_message', messageData);
    }

    sendNotificationToUser(userId, notificationData) {
        this.io.emit('notification', {
            userId,
            ...notificationData
        });
    }
}

module.exports = SocketService;