{% extends "admin/layout.html" %}
{% let active_page = "media" %}

{% block title %}{{ t.media_upload_title }}{% endblock %}

{% block content %}
<div class="page-head">
    <h1>{{ t.media_title }}</h1>
</div>

<section class="admin-section">
    <header class="admin-section-head">
        <span class="admin-section-icon" aria-hidden="true">📤</span>
        <div>
            <h2>{{ t.media_upload_title }}</h2>
            <p>{{ client_name }} · {{ visit_label }}</p>
        </div>
    </header>
    <div class="admin-section-body">

    <form id="uploadForm" action="/admin/media/{{ visit_id }}/upload/submit" enctype="multipart/form-data">
        <div class="field">
            <label class="label">{{ t.media_choose_files }}</label>
            <div class="control">
                <input class="input" type="file" id="uploadFiles" name="files" multiple accept="image/*,video/*" required>
            </div>
            <p id="fileCount" class="field-help"></p>
            <div id="uploadQueue" class="upload-queue"></div>
        </div>

        <div class="field">
            <label class="label">{{ t.media_caption }}</label>
            <div class="control">
                <input class="input" type="text" name="caption" placeholder="{{ t.media_caption }}">
            </div>
        </div>

        <!-- Progress -->
        <div id="uploadProgress" class="upload-progress">
            <div class="upload-progress-head">
                <span id="uploadStatusText">{{ t.media_upload }}...</span>
                <span id="uploadPercent">0%</span>
            </div>
            <div class="upload-progress-track">
                <div id="uploadBar" class="upload-progress-bar"></div>
            </div>
        </div>

        <button type="submit" id="uploadSubmit" class="button is-primary is-fullwidth">{{ t.media_upload }}</button>
    </form>

    <script>
    (function() {
        var form       = document.getElementById('uploadForm');
        var filesInput = document.getElementById('uploadFiles');
        var fileCount  = document.getElementById('fileCount');
        var queue      = document.getElementById('uploadQueue');
        var progress   = document.getElementById('uploadProgress');
        var bar        = document.getElementById('uploadBar');
        var percent    = document.getElementById('uploadPercent');
        var statusText = document.getElementById('uploadStatusText');
        var submitBtn  = document.getElementById('uploadSubmit');

        filesInput.addEventListener('change', function() {
            var n = this.files.length;
            fileCount.textContent = n > 0 ? ('{{ t.media_files_selected }}: ' + n) : '';
            queue.replaceChildren();
            Array.from(this.files).forEach(function(file) {
                var item = document.createElement('div');
                item.className = 'upload-queue-item';
                var icon = document.createElement('span');
                icon.className = 'upload-queue-icon';
                icon.textContent = file.type.indexOf('video/') === 0 ? '🎬' : '🖼️';
                var details = document.createElement('div');
                var name = document.createElement('div');
                name.className = 'upload-queue-name';
                name.textContent = file.name;
                var state = document.createElement('div');
                state.className = 'upload-queue-state';
                state.textContent = '0%';
                var track = document.createElement('div');
                track.className = 'upload-queue-track';
                var itemBar = document.createElement('div');
                itemBar.className = 'upload-queue-bar';
                track.appendChild(itemBar);
                details.append(name, state, track);
                item.append(icon, details);
                queue.appendChild(item);
            });
        });

        function updateQueue(state, progressValue, processing) {
            queue.querySelectorAll('.upload-queue-item').forEach(function(item) {
                item.querySelector('.upload-queue-state').textContent = state;
                var itemBar = item.querySelector('.upload-queue-bar');
                itemBar.classList.toggle('is-processing', processing);
                if (!processing) itemBar.style.width = progressValue + '%';
            });
        }

        form.addEventListener('submit', function(e) {
            e.preventDefault();
            if (!filesInput.files.length) return;

            var data = new FormData(form);
            var xhr  = new XMLHttpRequest();

            progress.style.display = 'block';
            submitBtn.disabled = true;
            submitBtn.textContent = '{{ t.media_upload_sending }}';
            statusText.textContent = '{{ t.media_upload_sending }}';
            bar.classList.remove('is-processing');
            bar.style.width = '0%';
            percent.textContent = '0%';

            xhr.upload.addEventListener('progress', function(ev) {
                if (!ev.lengthComputable) return;
                var pct = Math.round(ev.loaded / ev.total * 100);
                bar.style.width = pct + '%';
                percent.textContent = pct + '%';
                updateQueue(pct + '%', pct, false);
                if (pct === 100) {
                    statusText.textContent = '{{ t.media_upload_processing }}';
                    percent.textContent = '•••';
                    bar.classList.add('is-processing');
                    updateQueue('{{ t.media_upload_processing }}', 100, true);
                }
            });
            xhr.upload.addEventListener('load', function() {
                statusText.textContent = '{{ t.media_upload_processing }}';
                percent.textContent = '•••';
                bar.classList.add('is-processing');
                updateQueue('{{ t.media_upload_processing }}', 100, true);
            });

            xhr.addEventListener('load', function() {
                if (xhr.status >= 200 && xhr.status < 400) {
                    bar.style.width = '100%';
                    bar.classList.remove('is-processing');
                    percent.textContent = '100%';
                    statusText.textContent = '{{ t.media_upload_done }}';
                    updateQueue('{{ t.media_upload_done }}', 100, false);
                    setTimeout(function() { window.location.href = xhr.responseURL || '/admin/media'; }, 300);
                } else {
                    bar.classList.remove('is-processing');
                    statusText.textContent = 'Ошибка загрузки (' + xhr.status + ')';
                    updateQueue('Ошибка загрузки', 0, false);
                    submitBtn.disabled = false;
                    submitBtn.textContent = '{{ t.media_upload }}';
                }
            });

            xhr.addEventListener('error', function() {
                bar.classList.remove('is-processing');
                statusText.textContent = '{{ t.media_upload_connection_error }}';
                updateQueue('{{ t.media_upload_connection_error }}', 0, false);
                submitBtn.disabled = false;
                submitBtn.textContent = '{{ t.media_upload }}';
            });

            xhr.open('POST', form.action);
            xhr.send(data);
        });
    })();
    </script>
    </div>
</section>

{% endblock %}