// agent-renderer.js — 브라우저 환경에서 실행됨 → WebRTC 사용 가능

let peerConnection = null;
let currentStream = null;

// 메인 프로세스로부터 명령 수신 (IPC)
console.log('electronAPI:', window.electronAPI);
console.log('desktopCapturer:', window.desktopCapturer);

window.electronAPI.send('displays', { types: ['screen'] });

console.log('start webrtc');
// 1. Socket 연결 (렌더러에서도 가능)

window.electronAPI.receive('start-webrtc', async (data) => {
    const source = data.sources.find(s => {
        return  s.id === data.displayId
    });

    // 3. WebRTC 연결
    peerConnection = new RTCPeerConnection({
        iceServers: [{urls: 'stun:stun.l.google.com:19302'}]
    });

    const stream = await navigator.mediaDevices.getUserMedia({
        audio: false,
        video: {
            mandatory: {
                chromeMediaSource: 'desktop',
                chromeMediaSourceId: source.id,
                minWidth: 1920,
                minHeight: 1080
            }
        }
    });
    currentStream = stream;
    stream.getTracks().forEach(track => {
        console.log('track', track, stream);
        peerConnection.addTrack(track, stream)
    });

    const offer = await peerConnection.createOffer({offerToReceiveVideo: true})
    await peerConnection.setLocalDescription(offer);
    window.electronAPI.send('offer', {type:'offer', targetId: data.targetId, offer})
});

window.electronAPI.receive('displays', async (payload) => {
    window.desktopCapturer.getSources(['display'])
});


window.electronAPI.receive('answer', async (data) => {
    console.log('answer', data)
    await peerConnection.setRemoteDescription(new RTCSessionDescription(data.answer));
    console.log('connect')
})

window.electronAPI.receive('webrtcSignal', async (data) => {
    try {
        console.log('webrtcSignal', data)
        if (!peerConnection) return;
        if (data.type === 'icecandidate' && data.candidate) {
            await peerConnection.addIceCandidate(new RTCIceCandidate(data.candidate));
        } else if(data.type === 'answer') {
            await peerConnection.setRemoteDescription(new RTCSessionDescription(data.answer));
        }
    } catch (err) {
        console.error('ICE candidate 처리 오류:', err);
    }

})
// desktopCapturer 사용을 위해 preload 필요
// → 다음 단계에서 preload.js 설정