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

let peerConnection = null;
let currentStream = null;
let dataChannel = null;
let connection = false;
// 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
            }
        }
    });

    await peerConnection.setRemoteDescription(new RTCSessionDescription(data.offer));
    currentStream = stream;
    stream.getTracks().forEach(track => {
        console.log('track', track, stream);
        peerConnection.addTrack(track, stream)
    });
    const answer = await peerConnection.createAnswer();
    await peerConnection.setLocalDescription(answer);
    connection = true;


    window.electronAPI.send('requestAnswer', {type: 'answer', targetId: data.targetId, answer});

    peerConnection.onicecandidate =  (event) => {
        setTimeout(() => {
            console.log('icecandidate', event);
            window.electronAPI.send('icecandidate', {type: 'icecandidate', targetId: data.targetId, server:'agent', 'candidate': event.candidate});
        }, 2000)
    }

    peerConnection.ondatachannel =  (event) => {
        console.log('datachannel', event);
        dataChannel = event.channel;
        dataChannel.onmessage = (event) => {
            window.electronAPI.send('inputEvent', JSON.parse(event.data))
        }
    }


});

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

window.electronAPI.receive('icecandidate', async (data) => {
    if(connection) {
        console.log(data.candidate)
        await peerConnection.addIceCandidate(new RTCIceCandidate(data.candidate));
    }
});

window.electronAPI.receive('disconnect', async (data) => {
    peerConnection.close();
    peerConnection = null;
});

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