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<!DOCTYPE html>
<html lang="ko">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Video Gallery</title>
    <style>
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        .container {
            max-width: 1800px;
            margin: 0 auto;
            padding: 20px;
        }

        .selected-content {
            display: flex;
            margin-bottom: 30px;
            gap: 20px;
            height: 400px;
        }

        .selected-thumbnail {
            flex: 1;
            background-color: #000;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .selected-thumbnail video {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
        }

        .selected-video {
            flex: 1;
            background-color: #000;
        }

        .selected-video video {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        .gallery {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 10px;
        }

        .thumbnail {
            position: relative;
            padding-top: 56.25%; /* 16:9 비율 */
            cursor: pointer;
            overflow: hidden;
            background-color: #000;
        }

        .thumbnail video {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .thumbnail:hover video {
            transform: scale(1.1);
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="selected-content">
            <div class="selected-thumbnail">
                <video id="selected-thumb" playsinline muted>
                    <source src="" type="video/mp4">
                </video>
            </div>
            <div class="selected-video">
                <video id="selected-video" controls>
                    <source src="" type="video/mp4">
                </video>
            </div>
        </div>

        <div class="gallery" id="video-gallery"></div>
    </div>

    <script>
        async function getVideoFiles() {
            try {
                const response = await fetch('.');
                const text = await response.text();
                const parser = new DOMParser();
                const doc = parser.parseFromString(text, 'text/html');
                const links = Array.from(doc.querySelectorAll('a'));
                return links
                    .map(link => link.href)
                    .filter(href => href.endsWith('.mp4'))
                    .sort();
            } catch (error) {
                console.error('Error loading video files:', error);
                return [];
            }
        }

        async function initializeGallery() {
            const gallery = document.getElementById('video-gallery');
            const selectedThumb = document.getElementById('selected-thumb');
            const selectedVideo = document.getElementById('selected-video');
            
            const videoFiles = await getVideoFiles();

            videoFiles.forEach((videoPath) => {
                const thumbnail = document.createElement('div');
                thumbnail.className = 'thumbnail';
                
                const thumbVideo = document.createElement('video');
                thumbVideo.src = videoPath;
                thumbVideo.playsinline = true;
                thumbVideo.muted = true;
                thumbVideo.preload = 'metadata';

                thumbVideo.addEventListener('loadeddata', () => {
                    thumbVideo.currentTime = 0;
                });

                thumbnail.appendChild(thumbVideo);
                
                thumbnail.addEventListener('click', () => {
                    selectedThumb.src = videoPath;
                    selectedVideo.src = videoPath;
                    selectedThumb.currentTime = 0;
                    selectedVideo.play();
                });

                gallery.appendChild(thumbnail);
            });

            // 첫 번째 비디오 자동 선택
            if (videoFiles.length > 0) {
                selectedThumb.src = videoFiles[0];
                selectedVideo.src = videoFiles[0];
                selectedThumb.currentTime = 0;
            }
        }

        // 갤러리 초기화
        initializeGallery();
    </script>
</body>
</html>