{% extends "base.html" %}
{% block title %}Web Camera Feed{% endblock %}
{% block head %}
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.7.2/socket.io.min.js"></script>
{% endblock %}
{% block content %}
<div class="container mt-4 text-center">
    <h1>Live Camera Feed (Web Receiver)</h1>
    <div class="position-relative d-inline-block" style="width: 100%; max-width: 800px;">
        <video id="webcamFeed" autoplay playsinline controls style="width: 100%; border-radius: 8px; background-color: #000;"></video>
        <div id="status" class="position-absolute top-50 start-50 translate-middle text-white bg-dark bg-opacity-75 p-3 rounded" style="display: none;">
            Waiting for connection...
        </div>
    </div>
</div>
{% endblock %}
{% block scripts %}
<script>
    const socket = io();
    const video = document.getElementById('webcamFeed');
    let peerConnection;
    const room = 'stream_room';
    
    const config = {
        iceServers: [
            { urls: 'stun:stun.l.google.com:19302' }
        ]
    };

    socket.on('connect', () => {
        console.log("Connected to signaling server");
        socket.emit('join', { room: room });
        document.getElementById('status').style.display = 'block';
    });

    socket.on('offer', async (offer) => {
        console.log("Received offer");
        document.getElementById('status').style.display = 'none';
        
        if (peerConnection) peerConnection.close();
        peerConnection = new RTCPeerConnection(config);

        peerConnection.onicecandidate = (event) => {
            if (event.candidate) {
                socket.emit('candidate', { candidate: event.candidate, room: room });
            }
        };

        peerConnection.ontrack = (event) => {
            console.log("Received track");
            video.srcObject = event.streams[0];
        };

        await peerConnection.setRemoteDescription(new RTCSessionDescription(offer));
        const answer = await peerConnection.createAnswer();
        await peerConnection.setLocalDescription(answer);
        socket.emit('answer', { answer: answer, room: room });
    });

    socket.on('candidate', async (candidate) => {
        if (!peerConnection) return;
        try {
            await peerConnection.addIceCandidate(new RTCIceCandidate(candidate));
        } catch (e) {
            console.error("Error adding received ice candidate", e);
        }
    });
    
    socket.on('disconnect', () => {
        console.log("Disconnected");
        if (peerConnection) peerConnection.close();
    });
</script>
{% endblock %}