{% extends "base.html" %}
{% block content %}
<div class="cameras-page">
    <!-- Header -->
    <div class="flex items-center justify-between mb-4 sticky top-0 bg-dark-900/95 backdrop-blur py-2 z-10">
        <div class="flex items-center gap-3">
            <a href="/" class="text-gray-400 hover:text-white p-2 -ml-2">
                <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 19l-7-7m0 0l7-7m-7 7h18"/>
                </svg>
            </a>
            <h1 class="text-lg font-semibold text-white">Cameras</h1>
            <span class="text-xs text-gray-500">{{ cameras | length }} cameras</span>
        </div>
        <div class="flex items-center gap-2">
            <!-- View Mode -->
            <div class="flex bg-dark-700 rounded-lg p-0.5">
                <button onclick="setViewMode('grid')" id="btn-grid" class="view-btn active px-2 py-1 text-xs rounded-md">
                    <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 6a2 2 0 012-2h2a2 2 0 012 2v2a2 2 0 01-2 2H6a2 2 0 01-2-2V6zM14 6a2 2 0 012-2h2a2 2 0 012 2v2a2 2 0 01-2 2h-2a2 2 0 01-2-2V6zM4 16a2 2 0 012-2h2a2 2 0 012 2v2a2 2 0 01-2 2H6a2 2 0 01-2-2v-2zM14 16a2 2 0 012-2h2a2 2 0 012 2v2a2 2 0 01-2 2h-2a2 2 0 01-2-2v-2z"/>
                    </svg>
                </button>
                <button onclick="setViewMode('list')" id="btn-list" class="view-btn px-2 py-1 text-xs rounded-md">
                    <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 6h16M4 12h16M4 18h16"/>
                    </svg>
                </button>
            </div>
            <!-- Reconnect -->
            <button onclick="reconnectAll()" class="p-2 text-gray-400 hover:text-white hover:bg-dark-700 rounded-lg" title="Reconnect all streams">
                <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"/>
                </svg>
            </button>
        </div>
    </div>

    <!-- Camera Grid -->
    <div id="camera-grid" class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-3">
        {% for camera in cameras %}
        <div class="camera-card" data-camera="{{ camera }}">
            <div class="aspect-video bg-dark-800 rounded-t-xl overflow-hidden relative cursor-pointer" onclick="openFullscreen('{{ camera }}')">
                <video id="video-{{ camera }}" 
                       class="w-full h-full object-cover"
                       autoplay muted playsinline
                       poster="{{ go2rtc_url }}/api/frame.jpeg?src={{ camera }}"></video>
                
                <!-- Status indicator -->
                <div id="status-{{ camera }}" class="absolute top-2 right-2 w-2.5 h-2.5 rounded-full bg-yellow-500 animate-pulse"></div>
                
                <!-- Live indicator -->
                <div class="absolute top-2 left-2">
                    <span class="live-badge flex items-center gap-1 px-1.5 py-0.5 bg-red-600/90 rounded text-[10px] text-white font-medium">
                        <span class="w-1.5 h-1.5 bg-white rounded-full animate-pulse"></span>
                        LIVE
                    </span>
                </div>
            </div>
            
            <div class="flex items-center justify-between bg-dark-700 rounded-b-xl px-3 py-2">
                <span class="text-sm text-white font-medium truncate">{{ camera | replace("_", " ") }}</span>
                <div class="flex gap-1">
                    <button onclick="event.stopPropagation(); reconnectCamera('{{ camera }}')" class="p-1.5 text-gray-400 hover:text-cyan-400 hover:bg-dark-600 rounded" title="Reconnect">
                        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"/>
                        </svg>
                    </button>
                    <button onclick="event.stopPropagation(); openFullscreen('{{ camera }}')" class="p-1.5 text-gray-400 hover:text-white hover:bg-dark-600 rounded" title="Fullscreen">
                        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 8V4m0 0h4M4 4l5 5m11-1V4m0 0h-4m4 0l-5 5M4 16v4m0 0h4m-4 0l5-5m11 5l-5-5m5 5v-4m0 4h-4"/>
                        </svg>
                    </button>
                </div>
            </div>
        </div>
        {% endfor %}
    </div>
</div>

<!-- Fullscreen Modal -->
<div id="fullscreen-modal" class="fixed inset-0 bg-black z-50 hidden">
    <div class="absolute top-4 left-4 right-4 flex items-center justify-between z-10">
        <div class="flex items-center gap-3">
            <h2 id="modal-title" class="text-white text-lg font-semibold drop-shadow-lg"></h2>
            <span class="live-badge flex items-center gap-1 px-2 py-0.5 bg-red-600 rounded text-xs text-white font-medium">
                <span class="w-1.5 h-1.5 bg-white rounded-full animate-pulse"></span>
                LIVE
            </span>
        </div>
        <button onclick="closeFullscreen()" class="p-2 bg-gray-800/80 hover:bg-gray-700 rounded-lg text-white">
            <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"/>
            </svg>
        </button>
    </div>
    <div class="w-full h-full flex items-center justify-center">
        <video id="modal-video" class="max-w-full max-h-full" autoplay playsinline></video>
    </div>
    <button onclick="prevCamera()" class="absolute left-2 top-1/2 -translate-y-1/2 p-3 bg-black/50 hover:bg-black/70 rounded-full text-white">
        <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7"/>
        </svg>
    </button>
    <button onclick="nextCamera()" class="absolute right-2 top-1/2 -translate-y-1/2 p-3 bg-black/50 hover:bg-black/70 rounded-full text-white">
        <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"/>
        </svg>
    </button>
    <div class="absolute bottom-4 left-1/2 -translate-x-1/2 px-3 py-1 bg-black/60 rounded-full text-white text-sm">
        <span id="modal-counter">1 / 12</span>
    </div>
</div>

<style>
    .cameras-page { padding-bottom: env(safe-area-inset-bottom); }
    .view-btn { color: #9ca3af; transition: all 0.15s; }
    .view-btn.active { background: #374151; color: white; }
    .view-btn:hover { color: white; }
    
    @supports (padding: max(0px)) {
        .cameras-page { 
            padding-left: max(0.75rem, env(safe-area-inset-left)); 
            padding-right: max(0.75rem, env(safe-area-inset-right)); 
        }
    }
</style>

<script>
    const cameras = {{ cameras | tojson }};
    let currentCameraIndex = 0;
    let peerConnections = {};
    let fullscreenPC = null;

    // Initialize WebRTC stream for a camera
    async function initCameraStream(cameraId) {
        const video = document.getElementById('video-' + cameraId);
        const status = document.getElementById('status-' + cameraId);
        
        if (!video) return;

        try {
            // Close existing connection if any
            if (peerConnections[cameraId]) {
                peerConnections[cameraId].close();
            }

            status.className = 'absolute top-2 right-2 w-2.5 h-2.5 rounded-full bg-yellow-500 animate-pulse';

            const pc = new RTCPeerConnection({
                iceServers: [{ urls: 'stun:stun.l.google.com:19302' }]
            });

            peerConnections[cameraId] = pc;

            pc.ontrack = (event) => {
                video.srcObject = event.streams[0];
                status.className = 'absolute top-2 right-2 w-2.5 h-2.5 rounded-full bg-green-500';
            };

            pc.oniceconnectionstatechange = () => {
                if (pc.iceConnectionState === 'disconnected' || pc.iceConnectionState === 'failed') {
                    status.className = 'absolute top-2 right-2 w-2.5 h-2.5 rounded-full bg-red-500';
                    setTimeout(() => initCameraStream(cameraId), 5000);
                }
            };

            pc.addTransceiver('video', { direction: 'recvonly' });
            pc.addTransceiver('audio', { direction: 'recvonly' });

            const offer = await pc.createOffer();
            await pc.setLocalDescription(offer);

            const response = await fetch('/api/webrtc?src=' + cameraId, {
                method: 'POST',
                headers: { 'Content-Type': 'application/sdp' },
                body: offer.sdp
            });

            if (!response.ok) throw new Error('HTTP ' + response.status);

            const answer = await response.text();
            await pc.setRemoteDescription({ type: 'answer', sdp: answer });

        } catch (error) {
            console.error('Failed to connect ' + cameraId + ':', error);
            status.className = 'absolute top-2 right-2 w-2.5 h-2.5 rounded-full bg-red-500';
            setTimeout(() => initCameraStream(cameraId), 10000);
        }
    }

    function reconnectCamera(cameraId) {
        initCameraStream(cameraId);
    }

    function reconnectAll() {
        cameras.forEach(cam => initCameraStream(cam));
    }

    function setViewMode(mode) {
        const grid = document.getElementById('camera-grid');
        const btnGrid = document.getElementById('btn-grid');
        const btnList = document.getElementById('btn-list');
        
        if (mode === 'list') {
            grid.className = 'flex flex-col gap-3';
            btnList.classList.add('active');
            btnGrid.classList.remove('active');
        } else {
            grid.className = 'grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-3';
            btnGrid.classList.add('active');
            btnList.classList.remove('active');
        }
        localStorage.setItem('cameraViewMode', mode);
    }

    async function openFullscreen(camera) {
        currentCameraIndex = cameras.indexOf(camera);
        const modal = document.getElementById('fullscreen-modal');
        const video = document.getElementById('modal-video');
        const title = document.getElementById('modal-title');
        const counter = document.getElementById('modal-counter');

        title.textContent = camera.replace(/_/g, ' ');
        counter.textContent = (currentCameraIndex + 1) + ' / ' + cameras.length;

        modal.classList.remove('hidden');
        document.body.style.overflow = 'hidden';

        await initFullscreenStream(camera, video);
    }

    async function initFullscreenStream(cameraId, video) {
        if (fullscreenPC) {
            fullscreenPC.close();
        }

        const pc = new RTCPeerConnection({
            iceServers: [{ urls: 'stun:stun.l.google.com:19302' }]
        });

        fullscreenPC = pc;

        pc.ontrack = (event) => {
            video.srcObject = event.streams[0];
        };

        pc.addTransceiver('video', { direction: 'recvonly' });
        pc.addTransceiver('audio', { direction: 'recvonly' });

        const offer = await pc.createOffer();
        await pc.setLocalDescription(offer);

        try {
            const response = await fetch('/api/webrtc?src=' + cameraId, {
                method: 'POST',
                headers: { 'Content-Type': 'application/sdp' },
                body: offer.sdp
            });

            const answer = await response.text();
            await pc.setRemoteDescription({ type: 'answer', sdp: answer });
        } catch (error) {
            console.error('Fullscreen stream error:', error);
        }
    }

    function closeFullscreen() {
        const modal = document.getElementById('fullscreen-modal');
        const video = document.getElementById('modal-video');

        modal.classList.add('hidden');
        document.body.style.overflow = '';

        if (fullscreenPC) {
            fullscreenPC.close();
            fullscreenPC = null;
        }
        video.srcObject = null;
    }

    function prevCamera() {
        currentCameraIndex = (currentCameraIndex - 1 + cameras.length) % cameras.length;
        openFullscreen(cameras[currentCameraIndex]);
    }

    function nextCamera() {
        currentCameraIndex = (currentCameraIndex + 1) % cameras.length;
        openFullscreen(cameras[currentCameraIndex]);
    }

    document.addEventListener('keydown', (e) => {
        if (!document.getElementById('fullscreen-modal').classList.contains('hidden')) {
            if (e.key === 'Escape') closeFullscreen();
            if (e.key === 'ArrowLeft') prevCamera();
            if (e.key === 'ArrowRight') nextCamera();
        }
    });

    let touchStartX = 0;
    document.getElementById('fullscreen-modal').addEventListener('touchstart', (e) => {
        touchStartX = e.touches[0].clientX;
    });
    document.getElementById('fullscreen-modal').addEventListener('touchend', (e) => {
        const diff = touchStartX - e.changedTouches[0].clientX;
        if (Math.abs(diff) > 50) {
            if (diff > 0) nextCamera();
            else prevCamera();
        }
    });

    // Initialize on page load
    document.addEventListener('DOMContentLoaded', () => {
        const savedView = localStorage.getItem('cameraViewMode');
        if (savedView) setViewMode(savedView);

        // Stagger camera connections to avoid overwhelming the server
        cameras.forEach((cam, index) => {
            setTimeout(() => initCameraStream(cam), index * 500);
        });
    });
</script>
{% endblock %}