/**
 * Streams — picture sources, capture templates, PP templates, filters.
 */

import {
    _cachedDisplays, set_cachedDisplays,
    _cachedStreams, set_cachedStreams,
    _cachedPPTemplates, set_cachedPPTemplates,
    _cachedCaptureTemplates, set_cachedCaptureTemplates,
    _availableFilters, set_availableFilters,
    availableEngines, setAvailableEngines,
    currentEditingTemplateId, setCurrentEditingTemplateId,
    _templateNameManuallyEdited, set_templateNameManuallyEdited,
    _streamNameManuallyEdited, set_streamNameManuallyEdited,
    _streamModalPPTemplates, set_streamModalPPTemplates,
    _modalFilters, set_modalFilters,
    _ppTemplateNameManuallyEdited, set_ppTemplateNameManuallyEdited,
    _currentTestStreamId, set_currentTestStreamId,
    _currentTestPPTemplateId, set_currentTestPPTemplateId,
    _lastValidatedImageSource, set_lastValidatedImageSource,
} from '../core/state.js';
import { API_BASE, getHeaders, fetchWithAuth, escapeHtml, handle401Error } from '../core/api.js';
import { t } from '../core/i18n.js';
import { setupBackdropClose, lockBody, unlockBody, showToast, showConfirm, openLightbox, openFullImageLightbox, showOverlaySpinner, hideOverlaySpinner } from '../core/ui.js';
import { openDisplayPicker, formatDisplayLabel } from './displays.js';

// ===== Capture Templates =====

async function loadCaptureTemplates() {
    try {
        const response = await fetchWithAuth('/capture-templates');
        if (!response.ok) throw new Error(`Failed to load templates: ${response.status}`);
        const data = await response.json();
        set_cachedCaptureTemplates(data.templates || []);
        renderPictureSourcesList(_cachedStreams);
    } catch (error) {
        console.error('Error loading capture templates:', error);
    }
}

function getEngineIcon(engineType) {
    return '🚀';
}

export async function showAddTemplateModal() {
    setCurrentEditingTemplateId(null);
    document.getElementById('template-modal-title').textContent = t('templates.add');
    document.getElementById('template-form').reset();
    document.getElementById('template-id').value = '';
    document.getElementById('engine-config-section').style.display = 'none';
    document.getElementById('template-error').style.display = 'none';

    set_templateNameManuallyEdited(false);
    document.getElementById('template-name').oninput = () => { set_templateNameManuallyEdited(true); };

    await loadAvailableEngines();

    const modal = document.getElementById('template-modal');
    modal.style.display = 'flex';
    setupBackdropClose(modal, closeTemplateModal);
}

export async function editTemplate(templateId) {
    try {
        const response = await fetchWithAuth(`/capture-templates/${templateId}`);
        if (!response.ok) throw new Error(`Failed to load template: ${response.status}`);
        const template = await response.json();

        setCurrentEditingTemplateId(templateId);
        document.getElementById('template-modal-title').textContent = t('templates.edit');
        document.getElementById('template-id').value = templateId;
        document.getElementById('template-name').value = template.name;
        document.getElementById('template-description').value = template.description || '';

        await loadAvailableEngines();
        document.getElementById('template-engine').value = template.engine_type;
        await onEngineChange();
        populateEngineConfig(template.engine_config);

        await loadDisplaysForTest();

        const testResults = document.getElementById('template-test-results');
        if (testResults) testResults.style.display = 'none';
        document.getElementById('template-error').style.display = 'none';

        const modal = document.getElementById('template-modal');
        modal.style.display = 'flex';
        setupBackdropClose(modal, closeTemplateModal);
    } catch (error) {
        console.error('Error loading template:', error);
        showToast(t('templates.error.load') + ': ' + error.message, 'error');
    }
}

export function closeTemplateModal() {
    document.getElementById('template-modal').style.display = 'none';
    setCurrentEditingTemplateId(null);
}

function updateCaptureDuration(value) {
    document.getElementById('test-template-duration-value').textContent = value;
    localStorage.setItem('capture_duration', value);
}

function restoreCaptureDuration() {
    const savedDuration = localStorage.getItem('capture_duration');
    if (savedDuration) {
        const durationInput = document.getElementById('test-template-duration');
        const durationValue = document.getElementById('test-template-duration-value');
        durationInput.value = savedDuration;
        durationValue.textContent = savedDuration;
    }
}

export async function showTestTemplateModal(templateId) {
    const templates = await fetchWithAuth('/capture-templates').then(r => r.json());
    const template = templates.templates.find(t => t.id === templateId);

    if (!template) {
        showToast(t('templates.error.load'), 'error');
        return;
    }

    window.currentTestingTemplate = template;
    await loadDisplaysForTest();
    restoreCaptureDuration();

    const modal = document.getElementById('test-template-modal');
    modal.style.display = 'flex';
    setupBackdropClose(modal, closeTestTemplateModal);
}

export function closeTestTemplateModal() {
    document.getElementById('test-template-modal').style.display = 'none';
    window.currentTestingTemplate = null;
}

async function loadAvailableEngines() {
    try {
        const response = await fetchWithAuth('/capture-engines');
        if (!response.ok) throw new Error(`Failed to load engines: ${response.status}`);
        const data = await response.json();
        setAvailableEngines(data.engines || []);

        const select = document.getElementById('template-engine');
        select.innerHTML = '';

        availableEngines.forEach(engine => {
            const option = document.createElement('option');
            option.value = engine.type;
            option.textContent = `${getEngineIcon(engine.type)} ${engine.name}`;
            if (!engine.available) {
                option.disabled = true;
                option.textContent += ` (${t('templates.engine.unavailable')})`;
            }
            select.appendChild(option);
        });

        if (!select.value) {
            const firstAvailable = availableEngines.find(e => e.available);
            if (firstAvailable) select.value = firstAvailable.type;
        }
    } catch (error) {
        console.error('Error loading engines:', error);
        showToast(t('templates.error.engines') + ': ' + error.message, 'error');
    }
}

export async function onEngineChange() {
    const engineType = document.getElementById('template-engine').value;
    const configSection = document.getElementById('engine-config-section');
    const configFields = document.getElementById('engine-config-fields');

    if (!engineType) { configSection.style.display = 'none'; return; }

    const engine = availableEngines.find(e => e.type === engineType);
    if (!engine) { configSection.style.display = 'none'; return; }

    if (!_templateNameManuallyEdited && !document.getElementById('template-id').value) {
        document.getElementById('template-name').value = engine.name || engineType;
    }

    const hint = document.getElementById('engine-availability-hint');
    if (!engine.available) {
        hint.textContent = t('templates.engine.unavailable.hint');
        hint.style.display = 'block';
        hint.style.color = 'var(--error-color)';
    } else {
        hint.style.display = 'none';
    }

    configFields.innerHTML = '';
    const defaultConfig = engine.default_config || {};

    if (Object.keys(defaultConfig).length === 0) {
        configSection.style.display = 'none';
        return;
    } else {
        let gridHtml = '<div class="config-grid">';
        Object.entries(defaultConfig).forEach(([key, value]) => {
            const fieldType = typeof value === 'number' ? 'number' : 'text';
            const fieldValue = typeof value === 'boolean' ? (value ? 'true' : 'false') : value;
            gridHtml += `
                <label class="config-grid-label" for="config-${key}">${key}</label>
                <div class="config-grid-value">
                    ${typeof value === 'boolean' ? `
                        <select id="config-${key}" data-config-key="${key}">
                            <option value="true" ${value ? 'selected' : ''}>true</option>
                            <option value="false" ${!value ? 'selected' : ''}>false</option>
                        </select>
                    ` : `
                        <input type="${fieldType}" id="config-${key}" data-config-key="${key}" value="${fieldValue}">
                    `}
                </div>
            `;
        });
        gridHtml += '</div>';
        configFields.innerHTML = gridHtml;
    }

    configSection.style.display = 'block';
}

function populateEngineConfig(config) {
    Object.entries(config).forEach(([key, value]) => {
        const field = document.getElementById(`config-${key}`);
        if (field) {
            if (field.tagName === 'SELECT') {
                field.value = value.toString();
            } else {
                field.value = value;
            }
        }
    });
}

function collectEngineConfig() {
    const config = {};
    const fields = document.querySelectorAll('[data-config-key]');
    fields.forEach(field => {
        const key = field.dataset.configKey;
        let value = field.value;
        if (field.type === 'number') {
            value = parseFloat(value);
        } else if (field.tagName === 'SELECT' && (value === 'true' || value === 'false')) {
            value = value === 'true';
        }
        config[key] = value;
    });
    return config;
}

async function loadDisplaysForTest() {
    try {
        if (!_cachedDisplays) {
            const response = await fetchWithAuth('/config/displays');
            if (!response.ok) throw new Error(`Failed to load displays: ${response.status}`);
            const displaysData = await response.json();
            set_cachedDisplays(displaysData.displays || []);
        }

        let selectedIndex = null;
        const lastDisplay = localStorage.getItem('lastTestDisplayIndex');

        if (lastDisplay !== null) {
            const found = _cachedDisplays.find(d => d.index === parseInt(lastDisplay));
            if (found) selectedIndex = found.index;
        }

        if (selectedIndex === null) {
            const primary = _cachedDisplays.find(d => d.is_primary);
            if (primary) selectedIndex = primary.index;
            else if (_cachedDisplays.length > 0) selectedIndex = _cachedDisplays[0].index;
        }

        if (selectedIndex !== null) {
            const display = _cachedDisplays.find(d => d.index === selectedIndex);
            onTestDisplaySelected(selectedIndex, display);
        }
    } catch (error) {
        console.error('Error loading displays:', error);
    }
}

export async function runTemplateTest() {
    if (!window.currentTestingTemplate) {
        showToast(t('templates.test.error.no_engine'), 'error');
        return;
    }

    const displayIndex = document.getElementById('test-template-display').value;
    const captureDuration = parseFloat(document.getElementById('test-template-duration').value);

    if (displayIndex === '') {
        showToast(t('templates.test.error.no_display'), 'error');
        return;
    }

    const template = window.currentTestingTemplate;
    showOverlaySpinner(t('templates.test.running'), captureDuration);
    const signal = window._overlayAbortController?.signal;

    try {
        const response = await fetchWithAuth('/capture-templates/test', {
            method: 'POST',
            body: JSON.stringify({
                engine_type: template.engine_type,
                engine_config: template.engine_config,
                display_index: parseInt(displayIndex),
                capture_duration: captureDuration
            }),
            signal
        });

        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || error.message || 'Test failed');
        }

        const result = await response.json();
        localStorage.setItem('lastTestDisplayIndex', displayIndex);
        displayTestResults(result);
    } catch (error) {
        if (error.name === 'AbortError') return;
        console.error('Error running test:', error);
        hideOverlaySpinner();
        showToast(t('templates.test.error.failed'), 'error');
    }
}

function buildTestStatsHtml(result) {
    const p = result.performance;
    const res = `${result.full_capture.width}x${result.full_capture.height}`;
    let html = `
        <div class="stat-item"><span>${t('templates.test.results.duration')}:</span> <strong>${p.capture_duration_s.toFixed(2)}s</strong></div>
        <div class="stat-item"><span>${t('templates.test.results.frame_count')}:</span> <strong>${p.frame_count}</strong></div>`;
    if (p.frame_count > 1) {
        html += `
        <div class="stat-item"><span>${t('templates.test.results.actual_fps')}:</span> <strong>${p.actual_fps.toFixed(1)}</strong></div>
        <div class="stat-item"><span>${t('templates.test.results.avg_capture_time')}:</span> <strong>${p.avg_capture_time_ms.toFixed(1)}ms</strong></div>`;
    }
    html += `
        <div class="stat-item"><span>Resolution:</span> <strong>${res}</strong></div>`;
    return html;
}

function displayTestResults(result) {
    hideOverlaySpinner();
    const fullImageSrc = result.full_capture.full_image || result.full_capture.image;
    openLightbox(fullImageSrc, buildTestStatsHtml(result));
}

export async function saveTemplate() {
    const templateId = document.getElementById('template-id').value;
    const name = document.getElementById('template-name').value.trim();
    const engineType = document.getElementById('template-engine').value;

    if (!name || !engineType) {
        showToast(t('templates.error.required'), 'error');
        return;
    }

    const description = document.getElementById('template-description').value.trim();
    const engineConfig = collectEngineConfig();

    const payload = { name, engine_type: engineType, engine_config: engineConfig, description: description || null };

    try {
        let response;
        if (templateId) {
            response = await fetchWithAuth(`/capture-templates/${templateId}`, { method: 'PUT', body: JSON.stringify(payload) });
        } else {
            response = await fetchWithAuth('/capture-templates', { method: 'POST', body: JSON.stringify(payload) });
        }

        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || error.message || 'Failed to save template');
        }

        showToast(templateId ? t('templates.updated') : t('templates.created'), 'success');
        closeTemplateModal();
        await loadCaptureTemplates();
    } catch (error) {
        console.error('Error saving template:', error);
        document.getElementById('template-error').textContent = error.message;
        document.getElementById('template-error').style.display = 'block';
    }
}

export async function deleteTemplate(templateId) {
    const confirmed = await showConfirm(t('templates.delete.confirm'));
    if (!confirmed) return;

    try {
        const response = await fetchWithAuth(`/capture-templates/${templateId}`, { method: 'DELETE' });
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || error.message || 'Failed to delete template');
        }
        showToast(t('templates.deleted'), 'success');
        await loadCaptureTemplates();
    } catch (error) {
        console.error('Error deleting template:', error);
        showToast(t('templates.error.delete') + ': ' + error.message, 'error');
    }
}

// ===== Picture Sources =====

export async function loadPictureSources() {
    try {
        const [filtersResp, ppResp, captResp, streamsResp] = await Promise.all([
            _availableFilters.length === 0 ? fetchWithAuth('/filters') : Promise.resolve(null),
            fetchWithAuth('/postprocessing-templates'),
            fetchWithAuth('/capture-templates'),
            fetchWithAuth('/picture-sources')
        ]);

        if (filtersResp && filtersResp.ok) {
            const fd = await filtersResp.json();
            set_availableFilters(fd.filters || []);
        }
        if (ppResp.ok) {
            const pd = await ppResp.json();
            set_cachedPPTemplates(pd.templates || []);
        }
        if (captResp.ok) {
            const cd = await captResp.json();
            set_cachedCaptureTemplates(cd.templates || []);
        }
        if (!streamsResp.ok) throw new Error(`Failed to load streams: ${streamsResp.status}`);
        const data = await streamsResp.json();
        set_cachedStreams(data.streams || []);
        renderPictureSourcesList(_cachedStreams);
    } catch (error) {
        console.error('Error loading picture sources:', error);
        document.getElementById('streams-list').innerHTML = `
            <div class="error-message">${t('streams.error.load')}: ${error.message}</div>
        `;
    }
}

export function switchStreamTab(tabKey) {
    document.querySelectorAll('.stream-tab-btn').forEach(btn =>
        btn.classList.toggle('active', btn.dataset.streamTab === tabKey)
    );
    document.querySelectorAll('.stream-tab-panel').forEach(panel =>
        panel.classList.toggle('active', panel.id === `stream-tab-${tabKey}`)
    );
    localStorage.setItem('activeStreamTab', tabKey);
}

function renderPictureSourcesList(streams) {
    const container = document.getElementById('streams-list');
    const activeTab = localStorage.getItem('activeStreamTab') || 'raw';

    const renderStreamCard = (stream) => {
        const typeIcons = { raw: '🖥️', processed: '🎨', static_image: '🖼️' };
        const typeIcon = typeIcons[stream.stream_type] || '📺';

        let detailsHtml = '';
        if (stream.stream_type === 'raw') {
            let capTmplName = '';
            if (stream.capture_template_id) {
                const capTmpl = _cachedCaptureTemplates.find(t => t.id === stream.capture_template_id);
                if (capTmpl) capTmplName = escapeHtml(capTmpl.name);
            }
            detailsHtml = `<div class="stream-card-props">
                <span class="stream-card-prop" title="${t('streams.display')}">🖥️ ${stream.display_index ?? 0}</span>
                <span class="stream-card-prop" title="${t('streams.target_fps')}">⚡ ${stream.target_fps ?? 30}</span>
                ${capTmplName ? `<span class="stream-card-prop" title="${t('streams.capture_template')}">📋 ${capTmplName}</span>` : ''}
            </div>`;
        } else if (stream.stream_type === 'processed') {
            const sourceStream = _cachedStreams.find(s => s.id === stream.source_stream_id);
            const sourceName = sourceStream ? escapeHtml(sourceStream.name) : (stream.source_stream_id || '-');
            let ppTmplName = '';
            if (stream.postprocessing_template_id) {
                const ppTmpl = _cachedPPTemplates.find(p => p.id === stream.postprocessing_template_id);
                if (ppTmpl) ppTmplName = escapeHtml(ppTmpl.name);
            }
            detailsHtml = `<div class="stream-card-props">
                <span class="stream-card-prop" title="${t('streams.source')}">📺 ${sourceName}</span>
                ${ppTmplName ? `<span class="stream-card-prop" title="${t('streams.pp_template')}">📋 ${ppTmplName}</span>` : ''}
            </div>`;
        } else if (stream.stream_type === 'static_image') {
            const src = stream.image_source || '';
            detailsHtml = `<div class="stream-card-props">
                <span class="stream-card-prop stream-card-prop-full" title="${escapeHtml(src)}">🌐 ${escapeHtml(src)}</span>
            </div>`;
        }

        return `
            <div class="template-card" data-stream-id="${stream.id}">
                <button class="card-remove-btn" onclick="deleteStream('${stream.id}')" title="${t('common.delete')}">&#x2715;</button>
                <div class="template-card-header">
                    <div class="template-name">${typeIcon} ${escapeHtml(stream.name)}</div>
                </div>
                ${detailsHtml}
                ${stream.description ? `<div class="template-config" style="opacity:0.7;">${escapeHtml(stream.description)}</div>` : ''}
                <div class="template-card-actions">
                    <button class="btn btn-icon btn-secondary" onclick="showTestStreamModal('${stream.id}')" title="${t('streams.test.title')}">🧪</button>
                    <button class="btn btn-icon btn-secondary" onclick="editStream('${stream.id}')" title="${t('common.edit')}">✏️</button>
                </div>
            </div>
        `;
    };

    const renderCaptureTemplateCard = (template) => {
        const engineIcon = getEngineIcon(template.engine_type);
        const configEntries = Object.entries(template.engine_config);
        return `
            <div class="template-card" data-template-id="${template.id}">
                <button class="card-remove-btn" onclick="deleteTemplate('${template.id}')" title="${t('common.delete')}">&#x2715;</button>
                <div class="template-card-header">
                    <div class="template-name">📋 ${escapeHtml(template.name)}</div>
                </div>
                ${template.description ? `<div class="template-config" style="opacity:0.7;">${escapeHtml(template.description)}</div>` : ''}
                <div class="stream-card-props">
                    <span class="stream-card-prop" title="${t('templates.engine')}">🚀 ${template.engine_type.toUpperCase()}</span>
                    ${configEntries.length > 0 ? `<span class="stream-card-prop" title="${t('templates.config.show')}">🔧 ${configEntries.length}</span>` : ''}
                </div>
                ${configEntries.length > 0 ? `
                    <details class="template-config-details">
                        <summary>${t('templates.config.show')}</summary>
                        <table class="config-table">
                            ${configEntries.map(([key, val]) => `
                                <tr>
                                    <td class="config-key">${escapeHtml(key)}</td>
                                    <td class="config-value">${escapeHtml(String(val))}</td>
                                </tr>
                            `).join('')}
                        </table>
                    </details>
                ` : ''}
                <div class="template-card-actions">
                    <button class="btn btn-icon btn-secondary" onclick="showTestTemplateModal('${template.id}')" title="${t('templates.test.title')}">🧪</button>
                    <button class="btn btn-icon btn-secondary" onclick="editTemplate('${template.id}')" title="${t('common.edit')}">✏️</button>
                </div>
            </div>
        `;
    };

    const renderPPTemplateCard = (tmpl) => {
        let filterChainHtml = '';
        if (tmpl.filters && tmpl.filters.length > 0) {
            const filterNames = tmpl.filters.map(fi => `<span class="filter-chain-item">${escapeHtml(_getFilterName(fi.filter_id))}</span>`);
            filterChainHtml = `<div class="filter-chain">${filterNames.join('<span class="filter-chain-arrow">→</span>')}</div>`;
        }
        return `
            <div class="template-card" data-pp-template-id="${tmpl.id}">
                <button class="card-remove-btn" onclick="deletePPTemplate('${tmpl.id}')" title="${t('common.delete')}">&#x2715;</button>
                <div class="template-card-header">
                    <div class="template-name">📋 ${escapeHtml(tmpl.name)}</div>
                </div>
                ${tmpl.description ? `<div class="template-config" style="opacity:0.7;">${escapeHtml(tmpl.description)}</div>` : ''}
                ${filterChainHtml}
                <div class="template-card-actions">
                    <button class="btn btn-icon btn-secondary" onclick="showTestPPTemplateModal('${tmpl.id}')" title="${t('postprocessing.test.title')}">🧪</button>
                    <button class="btn btn-icon btn-secondary" onclick="editPPTemplate('${tmpl.id}')" title="${t('common.edit')}">✏️</button>
                </div>
            </div>
        `;
    };

    const rawStreams = streams.filter(s => s.stream_type === 'raw');
    const processedStreams = streams.filter(s => s.stream_type === 'processed');
    const staticImageStreams = streams.filter(s => s.stream_type === 'static_image');

    const addStreamCard = (type) => `
        <div class="template-card add-template-card" onclick="showAddStreamModal('${type}')">
            <div class="add-template-icon">+</div>
        </div>`;

    const tabs = [
        { key: 'raw', icon: '🖥️', titleKey: 'streams.group.raw', streams: rawStreams },
        { key: 'static_image', icon: '🖼️', titleKey: 'streams.group.static_image', streams: staticImageStreams },
        { key: 'processed', icon: '🎨', titleKey: 'streams.group.processed', streams: processedStreams },
    ];

    const tabBar = `<div class="stream-tab-bar">${tabs.map(tab =>
        `<button class="stream-tab-btn${tab.key === activeTab ? ' active' : ''}" data-stream-tab="${tab.key}" onclick="switchStreamTab('${tab.key}')">${tab.icon} ${t(tab.titleKey)} <span class="stream-tab-count">${tab.streams.length}</span></button>`
    ).join('')}</div>`;

    const panels = tabs.map(tab => {
        let panelContent = '';

        if (tab.key === 'raw') {
            panelContent = `
                <div class="subtab-section">
                    <h3 class="subtab-section-header">${t('streams.section.streams')}</h3>
                    <div class="templates-grid">
                        ${tab.streams.map(renderStreamCard).join('')}
                        ${addStreamCard(tab.key)}
                    </div>
                </div>
                <div class="subtab-section">
                    <h3 class="subtab-section-header">${t('templates.title')}</h3>
                    <div class="templates-grid">
                        ${_cachedCaptureTemplates.map(renderCaptureTemplateCard).join('')}
                        <div class="template-card add-template-card" onclick="showAddTemplateModal()">
                            <div class="add-template-icon">+</div>
                        </div>
                    </div>
                </div>`;
        } else if (tab.key === 'processed') {
            panelContent = `
                <div class="subtab-section">
                    <h3 class="subtab-section-header">${t('streams.section.streams')}</h3>
                    <div class="templates-grid">
                        ${tab.streams.map(renderStreamCard).join('')}
                        ${addStreamCard(tab.key)}
                    </div>
                </div>
                <div class="subtab-section">
                    <h3 class="subtab-section-header">${t('postprocessing.title')}</h3>
                    <div class="templates-grid">
                        ${_cachedPPTemplates.map(renderPPTemplateCard).join('')}
                        <div class="template-card add-template-card" onclick="showAddPPTemplateModal()">
                            <div class="add-template-icon">+</div>
                        </div>
                    </div>
                </div>`;
        } else {
            panelContent = `
                <div class="templates-grid">
                    ${tab.streams.map(renderStreamCard).join('')}
                    ${addStreamCard(tab.key)}
                </div>`;
        }

        return `<div class="stream-tab-panel${tab.key === activeTab ? ' active' : ''}" id="stream-tab-${tab.key}">${panelContent}</div>`;
    }).join('');

    container.innerHTML = tabBar + panels;
}

export function onStreamTypeChange() {
    const streamType = document.getElementById('stream-type').value;
    document.getElementById('stream-raw-fields').style.display = streamType === 'raw' ? '' : 'none';
    document.getElementById('stream-processed-fields').style.display = streamType === 'processed' ? '' : 'none';
    document.getElementById('stream-static-image-fields').style.display = streamType === 'static_image' ? '' : 'none';
}

export function onStreamDisplaySelected(displayIndex, display) {
    document.getElementById('stream-display-index').value = displayIndex;
    document.getElementById('stream-display-picker-label').textContent = formatDisplayLabel(displayIndex, display);
    _autoGenerateStreamName();
}

export function onTestDisplaySelected(displayIndex, display) {
    document.getElementById('test-template-display').value = displayIndex;
    document.getElementById('test-display-picker-label').textContent = formatDisplayLabel(displayIndex, display);
}

function _autoGenerateStreamName() {
    if (_streamNameManuallyEdited) return;
    if (document.getElementById('stream-id').value) return;
    const streamType = document.getElementById('stream-type').value;
    const nameInput = document.getElementById('stream-name');

    if (streamType === 'raw') {
        const displayIndex = document.getElementById('stream-display-index').value;
        const templateSelect = document.getElementById('stream-capture-template');
        const templateName = templateSelect.selectedOptions[0]?.dataset?.name || '';
        if (displayIndex === '' || !templateName) return;
        nameInput.value = `D${displayIndex}_${templateName}`;
    } else if (streamType === 'processed') {
        const sourceSelect = document.getElementById('stream-source');
        const sourceName = sourceSelect.selectedOptions[0]?.dataset?.name || '';
        const ppTemplateId = document.getElementById('stream-pp-template').value;
        const ppTemplate = _streamModalPPTemplates.find(t => t.id === ppTemplateId);
        if (!sourceName) return;
        if (ppTemplate && ppTemplate.name) {
            nameInput.value = `${sourceName} (${ppTemplate.name})`;
        } else {
            nameInput.value = sourceName;
        }
    }
}

export async function showAddStreamModal(presetType) {
    const streamType = presetType || 'raw';
    const titleKeys = { raw: 'streams.add.raw', processed: 'streams.add.processed', static_image: 'streams.add.static_image' };
    document.getElementById('stream-modal-title').textContent = t(titleKeys[streamType] || 'streams.add');
    document.getElementById('stream-form').reset();
    document.getElementById('stream-id').value = '';
    document.getElementById('stream-display-index').value = '';
    document.getElementById('stream-display-picker-label').textContent = t('displays.picker.select');
    document.getElementById('stream-error').style.display = 'none';
    document.getElementById('stream-type').value = streamType;
    set_lastValidatedImageSource('');
    const imgSrcInput = document.getElementById('stream-image-source');
    imgSrcInput.value = '';
    document.getElementById('stream-image-preview-container').style.display = 'none';
    document.getElementById('stream-image-validation-status').style.display = 'none';
    imgSrcInput.onblur = () => validateStaticImage();
    imgSrcInput.onkeydown = (e) => { if (e.key === 'Enter') { e.preventDefault(); validateStaticImage(); } };
    imgSrcInput.onpaste = () => setTimeout(() => validateStaticImage(), 0);
    onStreamTypeChange();

    set_streamNameManuallyEdited(false);
    document.getElementById('stream-name').oninput = () => { set_streamNameManuallyEdited(true); };
    document.getElementById('stream-capture-template').onchange = () => _autoGenerateStreamName();
    document.getElementById('stream-source').onchange = () => _autoGenerateStreamName();
    document.getElementById('stream-pp-template').onchange = () => _autoGenerateStreamName();

    await populateStreamModalDropdowns();

    const modal = document.getElementById('stream-modal');
    modal.style.display = 'flex';
    lockBody();
    setupBackdropClose(modal, closeStreamModal);
}

export async function editStream(streamId) {
    try {
        const response = await fetchWithAuth(`/picture-sources/${streamId}`);
        if (!response.ok) throw new Error(`Failed to load stream: ${response.status}`);
        const stream = await response.json();

        const editTitleKeys = { raw: 'streams.edit.raw', processed: 'streams.edit.processed', static_image: 'streams.edit.static_image' };
        document.getElementById('stream-modal-title').textContent = t(editTitleKeys[stream.stream_type] || 'streams.edit');
        document.getElementById('stream-id').value = streamId;
        document.getElementById('stream-name').value = stream.name;
        document.getElementById('stream-description').value = stream.description || '';
        document.getElementById('stream-error').style.display = 'none';

        document.getElementById('stream-type').value = stream.stream_type;
        set_lastValidatedImageSource('');
        const imgSrcInput = document.getElementById('stream-image-source');
        document.getElementById('stream-image-preview-container').style.display = 'none';
        document.getElementById('stream-image-validation-status').style.display = 'none';
        imgSrcInput.onblur = () => validateStaticImage();
        imgSrcInput.onkeydown = (e) => { if (e.key === 'Enter') { e.preventDefault(); validateStaticImage(); } };
        imgSrcInput.onpaste = () => setTimeout(() => validateStaticImage(), 0);
        onStreamTypeChange();

        await populateStreamModalDropdowns();

        if (stream.stream_type === 'raw') {
            const displayIdx = stream.display_index ?? 0;
            const display = _cachedDisplays ? _cachedDisplays.find(d => d.index === displayIdx) : null;
            onStreamDisplaySelected(displayIdx, display);
            document.getElementById('stream-capture-template').value = stream.capture_template_id || '';
            const fps = stream.target_fps ?? 30;
            document.getElementById('stream-target-fps').value = fps;
            document.getElementById('stream-target-fps-value').textContent = fps;
        } else if (stream.stream_type === 'processed') {
            document.getElementById('stream-source').value = stream.source_stream_id || '';
            document.getElementById('stream-pp-template').value = stream.postprocessing_template_id || '';
        } else if (stream.stream_type === 'static_image') {
            document.getElementById('stream-image-source').value = stream.image_source || '';
            if (stream.image_source) validateStaticImage();
        }

        const modal = document.getElementById('stream-modal');
        modal.style.display = 'flex';
        lockBody();
        setupBackdropClose(modal, closeStreamModal);
    } catch (error) {
        console.error('Error loading stream:', error);
        showToast(t('streams.error.load') + ': ' + error.message, 'error');
    }
}

async function populateStreamModalDropdowns() {
    const [displaysRes, captureTemplatesRes, streamsRes, ppTemplatesRes] = await Promise.all([
        fetch(`${API_BASE}/config/displays`, { headers: getHeaders() }),
        fetchWithAuth('/capture-templates'),
        fetchWithAuth('/picture-sources'),
        fetchWithAuth('/postprocessing-templates'),
    ]);

    if (displaysRes.ok) {
        const displaysData = await displaysRes.json();
        set_cachedDisplays(displaysData.displays || []);
    }

    if (!document.getElementById('stream-display-index').value && _cachedDisplays && _cachedDisplays.length > 0) {
        const primary = _cachedDisplays.find(d => d.is_primary) || _cachedDisplays[0];
        onStreamDisplaySelected(primary.index, primary);
    }

    const templateSelect = document.getElementById('stream-capture-template');
    templateSelect.innerHTML = '';
    if (captureTemplatesRes.ok) {
        const data = await captureTemplatesRes.json();
        (data.templates || []).forEach(tmpl => {
            const opt = document.createElement('option');
            opt.value = tmpl.id;
            opt.dataset.name = tmpl.name;
            opt.textContent = `${getEngineIcon(tmpl.engine_type)} ${tmpl.name}`;
            templateSelect.appendChild(opt);
        });
    }

    const sourceSelect = document.getElementById('stream-source');
    sourceSelect.innerHTML = '';
    if (streamsRes.ok) {
        const data = await streamsRes.json();
        const editingId = document.getElementById('stream-id').value;
        (data.streams || []).forEach(s => {
            if (s.id === editingId) return;
            const opt = document.createElement('option');
            opt.value = s.id;
            opt.dataset.name = s.name;
            const typeLabels = { raw: '🖥️', processed: '🎨', static_image: '🖼️' };
            const typeLabel = typeLabels[s.stream_type] || '📺';
            opt.textContent = `${typeLabel} ${s.name}`;
            sourceSelect.appendChild(opt);
        });
    }

    set_streamModalPPTemplates([]);
    const ppSelect = document.getElementById('stream-pp-template');
    ppSelect.innerHTML = '';
    if (ppTemplatesRes.ok) {
        const data = await ppTemplatesRes.json();
        set_streamModalPPTemplates(data.templates || []);
        _streamModalPPTemplates.forEach(tmpl => {
            const opt = document.createElement('option');
            opt.value = tmpl.id;
            opt.textContent = tmpl.name;
            ppSelect.appendChild(opt);
        });
    }

    _autoGenerateStreamName();
}

export async function saveStream() {
    const streamId = document.getElementById('stream-id').value;
    const name = document.getElementById('stream-name').value.trim();
    const streamType = document.getElementById('stream-type').value;
    const description = document.getElementById('stream-description').value.trim();
    const errorEl = document.getElementById('stream-error');

    if (!name) { showToast(t('streams.error.required'), 'error'); return; }

    const payload = { name, description: description || null };
    if (!streamId) payload.stream_type = streamType;

    if (streamType === 'raw') {
        payload.display_index = parseInt(document.getElementById('stream-display-index').value) || 0;
        payload.capture_template_id = document.getElementById('stream-capture-template').value;
        payload.target_fps = parseInt(document.getElementById('stream-target-fps').value) || 30;
    } else if (streamType === 'processed') {
        payload.source_stream_id = document.getElementById('stream-source').value;
        payload.postprocessing_template_id = document.getElementById('stream-pp-template').value;
    } else if (streamType === 'static_image') {
        const imageSource = document.getElementById('stream-image-source').value.trim();
        if (!imageSource) { showToast(t('streams.error.required'), 'error'); return; }
        payload.image_source = imageSource;
    }

    try {
        let response;
        if (streamId) {
            response = await fetchWithAuth(`/picture-sources/${streamId}`, { method: 'PUT', body: JSON.stringify(payload) });
        } else {
            response = await fetchWithAuth('/picture-sources', { method: 'POST', body: JSON.stringify(payload) });
        }

        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || error.message || 'Failed to save stream');
        }

        showToast(streamId ? t('streams.updated') : t('streams.created'), 'success');
        closeStreamModal();
        await loadPictureSources();
    } catch (error) {
        console.error('Error saving stream:', error);
        errorEl.textContent = error.message;
        errorEl.style.display = 'block';
    }
}

export async function deleteStream(streamId) {
    const confirmed = await showConfirm(t('streams.delete.confirm'));
    if (!confirmed) return;

    try {
        const response = await fetchWithAuth(`/picture-sources/${streamId}`, { method: 'DELETE' });
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || error.message || 'Failed to delete stream');
        }
        showToast(t('streams.deleted'), 'success');
        await loadPictureSources();
    } catch (error) {
        console.error('Error deleting stream:', error);
        showToast(t('streams.error.delete') + ': ' + error.message, 'error');
    }
}

export function closeStreamModal() {
    document.getElementById('stream-modal').style.display = 'none';
    document.getElementById('stream-type').disabled = false;
    unlockBody();
}

async function validateStaticImage() {
    const source = document.getElementById('stream-image-source').value.trim();
    const previewContainer = document.getElementById('stream-image-preview-container');
    const previewImg = document.getElementById('stream-image-preview');
    const infoEl = document.getElementById('stream-image-info');
    const statusEl = document.getElementById('stream-image-validation-status');

    if (!source) {
        set_lastValidatedImageSource('');
        previewContainer.style.display = 'none';
        statusEl.style.display = 'none';
        return;
    }

    if (source === _lastValidatedImageSource) return;

    statusEl.textContent = t('streams.validate_image.validating');
    statusEl.className = 'validation-status loading';
    statusEl.style.display = 'block';
    previewContainer.style.display = 'none';

    try {
        const response = await fetchWithAuth('/picture-sources/validate-image', {
            method: 'POST',
            body: JSON.stringify({ image_source: source }),
        });
        const data = await response.json();

        set_lastValidatedImageSource(source);
        if (data.valid) {
            previewImg.src = data.preview;
            previewImg.style.cursor = 'pointer';
            previewImg.onclick = () => openFullImageLightbox(source);
            infoEl.textContent = `${data.width} × ${data.height} px`;
            previewContainer.style.display = '';
            statusEl.textContent = t('streams.validate_image.valid');
            statusEl.className = 'validation-status success';
        } else {
            previewContainer.style.display = 'none';
            statusEl.textContent = `${t('streams.validate_image.invalid')}: ${data.error}`;
            statusEl.className = 'validation-status error';
        }
    } catch (err) {
        previewContainer.style.display = 'none';
        statusEl.textContent = `${t('streams.validate_image.invalid')}: ${err.message}`;
        statusEl.className = 'validation-status error';
    }
}

// ===== Picture Source Test =====

export async function showTestStreamModal(streamId) {
    set_currentTestStreamId(streamId);
    restoreStreamTestDuration();

    const modal = document.getElementById('test-stream-modal');
    modal.style.display = 'flex';
    lockBody();
    setupBackdropClose(modal, closeTestStreamModal);
}

export function closeTestStreamModal() {
    document.getElementById('test-stream-modal').style.display = 'none';
    unlockBody();
    set_currentTestStreamId(null);
}

export function updateStreamTestDuration(value) {
    document.getElementById('test-stream-duration-value').textContent = value;
    localStorage.setItem('lastStreamTestDuration', value);
}

function restoreStreamTestDuration() {
    const saved = localStorage.getItem('lastStreamTestDuration') || '5';
    document.getElementById('test-stream-duration').value = saved;
    document.getElementById('test-stream-duration-value').textContent = saved;
}

export async function runStreamTest() {
    if (!_currentTestStreamId) return;
    const captureDuration = parseFloat(document.getElementById('test-stream-duration').value);
    showOverlaySpinner(t('streams.test.running'), captureDuration);
    const signal = window._overlayAbortController?.signal;

    try {
        const response = await fetchWithAuth(`/picture-sources/${_currentTestStreamId}/test`, {
            method: 'POST',
            body: JSON.stringify({ capture_duration: captureDuration }),
            signal
        });
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || error.message || 'Test failed');
        }
        const result = await response.json();
        hideOverlaySpinner();
        const fullImageSrc = result.full_capture.full_image || result.full_capture.image;
        openLightbox(fullImageSrc, buildTestStatsHtml(result));
    } catch (error) {
        if (error.name === 'AbortError') return;
        console.error('Error running stream test:', error);
        hideOverlaySpinner();
        showToast(t('streams.test.error.failed') + ': ' + error.message, 'error');
    }
}

// ===== PP Template Test =====

export async function showTestPPTemplateModal(templateId) {
    set_currentTestPPTemplateId(templateId);
    restorePPTestDuration();

    const select = document.getElementById('test-pp-source-stream');
    select.innerHTML = '';
    if (_cachedStreams.length === 0) {
        try {
            const resp = await fetchWithAuth('/picture-sources');
            if (resp.ok) { const d = await resp.json(); set_cachedStreams(d.streams || []); }
        } catch (e) { console.warn('Could not load streams for PP test:', e); }
    }
    for (const s of _cachedStreams) {
        const opt = document.createElement('option');
        opt.value = s.id;
        opt.textContent = s.name;
        select.appendChild(opt);
    }
    const lastStream = localStorage.getItem('lastPPTestStreamId');
    if (lastStream && _cachedStreams.find(s => s.id === lastStream)) {
        select.value = lastStream;
    }

    const modal = document.getElementById('test-pp-template-modal');
    modal.style.display = 'flex';
    lockBody();
    setupBackdropClose(modal, closeTestPPTemplateModal);
}

export function closeTestPPTemplateModal() {
    document.getElementById('test-pp-template-modal').style.display = 'none';
    unlockBody();
    set_currentTestPPTemplateId(null);
}

export function updatePPTestDuration(value) {
    document.getElementById('test-pp-duration-value').textContent = value;
    localStorage.setItem('lastPPTestDuration', value);
}

function restorePPTestDuration() {
    const saved = localStorage.getItem('lastPPTestDuration') || '5';
    document.getElementById('test-pp-duration').value = saved;
    document.getElementById('test-pp-duration-value').textContent = saved;
}

export async function runPPTemplateTest() {
    if (!_currentTestPPTemplateId) return;
    const sourceStreamId = document.getElementById('test-pp-source-stream').value;
    if (!sourceStreamId) { showToast(t('postprocessing.test.error.no_stream'), 'error'); return; }
    localStorage.setItem('lastPPTestStreamId', sourceStreamId);

    const captureDuration = parseFloat(document.getElementById('test-pp-duration').value);
    showOverlaySpinner(t('postprocessing.test.running'), captureDuration);
    const signal = window._overlayAbortController?.signal;

    try {
        const response = await fetchWithAuth(`/postprocessing-templates/${_currentTestPPTemplateId}/test`, {
            method: 'POST',
            body: JSON.stringify({ source_stream_id: sourceStreamId, capture_duration: captureDuration }),
            signal
        });
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || error.message || 'Test failed');
        }
        const result = await response.json();
        hideOverlaySpinner();
        const fullImageSrc = result.full_capture.full_image || result.full_capture.image;
        openLightbox(fullImageSrc, buildTestStatsHtml(result));
    } catch (error) {
        if (error.name === 'AbortError') return;
        console.error('Error running PP template test:', error);
        hideOverlaySpinner();
        showToast(t('postprocessing.test.error.failed') + ': ' + error.message, 'error');
    }
}

// ===== PP Templates =====

async function loadAvailableFilters() {
    try {
        const response = await fetchWithAuth('/filters');
        if (!response.ok) throw new Error(`Failed to load filters: ${response.status}`);
        const data = await response.json();
        set_availableFilters(data.filters || []);
    } catch (error) {
        console.error('Error loading available filters:', error);
        set_availableFilters([]);
    }
}

async function loadPPTemplates() {
    try {
        if (_availableFilters.length === 0) await loadAvailableFilters();
        const response = await fetchWithAuth('/postprocessing-templates');
        if (!response.ok) throw new Error(`Failed to load templates: ${response.status}`);
        const data = await response.json();
        set_cachedPPTemplates(data.templates || []);
        renderPictureSourcesList(_cachedStreams);
    } catch (error) {
        console.error('Error loading PP templates:', error);
    }
}

function _getFilterName(filterId) {
    const key = 'filters.' + filterId;
    const translated = t(key);
    if (translated === key) {
        const def = _availableFilters.find(f => f.filter_id === filterId);
        return def ? def.filter_name : filterId;
    }
    return translated;
}

function _populateFilterSelect() {
    const select = document.getElementById('pp-add-filter-select');
    select.innerHTML = `<option value="">${t('filters.select_type')}</option>`;
    for (const f of _availableFilters) {
        const name = _getFilterName(f.filter_id);
        select.innerHTML += `<option value="${f.filter_id}">${name}</option>`;
    }
}

export function renderModalFilterList() {
    const container = document.getElementById('pp-filter-list');
    if (_modalFilters.length === 0) {
        container.innerHTML = `<div class="pp-filter-empty">${t('filters.empty')}</div>`;
        return;
    }

    let html = '';
    _modalFilters.forEach((fi, index) => {
        const filterDef = _availableFilters.find(f => f.filter_id === fi.filter_id);
        const filterName = _getFilterName(fi.filter_id);
        const isExpanded = fi._expanded === true;

        let summary = '';
        if (filterDef && !isExpanded) {
            summary = filterDef.options_schema.map(opt => {
                const val = fi.options[opt.key] !== undefined ? fi.options[opt.key] : opt.default;
                return val;
            }).join(', ');
        }

        html += `<div class="pp-filter-card${isExpanded ? ' expanded' : ''}" data-filter-index="${index}">
            <div class="pp-filter-card-header" onclick="toggleFilterExpand(${index})">
                <span class="pp-filter-card-chevron">${isExpanded ? '&#x25BC;' : '&#x25B6;'}</span>
                <span class="pp-filter-card-name">${escapeHtml(filterName)}</span>
                ${summary ? `<span class="pp-filter-card-summary">${escapeHtml(summary)}</span>` : ''}
                <div class="pp-filter-card-actions" onclick="event.stopPropagation()">
                    <button type="button" class="btn-filter-action" onclick="moveFilter(${index}, -1)" title="${t('filters.move_up')}" ${index === 0 ? 'disabled' : ''}>&#x25B2;</button>
                    <button type="button" class="btn-filter-action" onclick="moveFilter(${index}, 1)" title="${t('filters.move_down')}" ${index === _modalFilters.length - 1 ? 'disabled' : ''}>&#x25BC;</button>
                    <button type="button" class="btn-filter-action btn-filter-remove" onclick="removeFilter(${index})" title="${t('filters.remove')}">&#x2715;</button>
                </div>
            </div>
            <div class="pp-filter-card-options"${isExpanded ? '' : ' style="display:none"'}>`;

        if (filterDef) {
            for (const opt of filterDef.options_schema) {
                const currentVal = fi.options[opt.key] !== undefined ? fi.options[opt.key] : opt.default;
                const inputId = `filter-${index}-${opt.key}`;
                if (opt.type === 'bool') {
                    const checked = currentVal === true || currentVal === 'true';
                    html += `<div class="pp-filter-option pp-filter-option-bool">
                        <label for="${inputId}">
                            <span>${escapeHtml(opt.label)}</span>
                            <input type="checkbox" id="${inputId}" ${checked ? 'checked' : ''}
                                onchange="updateFilterOption(${index}, '${opt.key}', this.checked)">
                        </label>
                    </div>`;
                } else {
                    html += `<div class="pp-filter-option">
                        <label for="${inputId}">
                            <span>${escapeHtml(opt.label)}:</span>
                            <span id="${inputId}-display">${currentVal}</span>
                        </label>
                        <input type="range" id="${inputId}"
                            min="${opt.min_value}" max="${opt.max_value}" step="${opt.step}" value="${currentVal}"
                            oninput="updateFilterOption(${index}, '${opt.key}', this.value); document.getElementById('${inputId}-display').textContent = this.value;">
                    </div>`;
                }
            }
        }

        html += `</div></div>`;
    });

    container.innerHTML = html;
}

export function addFilterFromSelect() {
    const select = document.getElementById('pp-add-filter-select');
    const filterId = select.value;
    if (!filterId) return;

    const filterDef = _availableFilters.find(f => f.filter_id === filterId);
    if (!filterDef) return;

    const options = {};
    for (const opt of filterDef.options_schema) {
        options[opt.key] = opt.default;
    }

    _modalFilters.push({ filter_id: filterId, options, _expanded: true });
    select.value = '';
    renderModalFilterList();
    _autoGeneratePPTemplateName();
}

export function toggleFilterExpand(index) {
    if (_modalFilters[index]) {
        _modalFilters[index]._expanded = !_modalFilters[index]._expanded;
        renderModalFilterList();
    }
}

export function removeFilter(index) {
    _modalFilters.splice(index, 1);
    renderModalFilterList();
    _autoGeneratePPTemplateName();
}

export function moveFilter(index, direction) {
    const newIndex = index + direction;
    if (newIndex < 0 || newIndex >= _modalFilters.length) return;
    const tmp = _modalFilters[index];
    _modalFilters[index] = _modalFilters[newIndex];
    _modalFilters[newIndex] = tmp;
    renderModalFilterList();
    _autoGeneratePPTemplateName();
}

export function updateFilterOption(filterIndex, optionKey, value) {
    if (_modalFilters[filterIndex]) {
        const fi = _modalFilters[filterIndex];
        const filterDef = _availableFilters.find(f => f.filter_id === fi.filter_id);
        if (filterDef) {
            const optDef = filterDef.options_schema.find(o => o.key === optionKey);
            if (optDef && optDef.type === 'bool') {
                fi.options[optionKey] = !!value;
            } else if (optDef && optDef.type === 'int') {
                fi.options[optionKey] = parseInt(value);
            } else {
                fi.options[optionKey] = parseFloat(value);
            }
        } else {
            fi.options[optionKey] = parseFloat(value);
        }
    }
}

function collectFilters() {
    return _modalFilters.map(fi => ({
        filter_id: fi.filter_id,
        options: { ...fi.options },
    }));
}

function _autoGeneratePPTemplateName() {
    if (_ppTemplateNameManuallyEdited) return;
    if (document.getElementById('pp-template-id').value) return;
    const nameInput = document.getElementById('pp-template-name');
    if (_modalFilters.length > 0) {
        const filterNames = _modalFilters.map(f => _getFilterName(f.filter_id)).join(' + ');
        nameInput.value = filterNames;
    } else {
        nameInput.value = '';
    }
}

export async function showAddPPTemplateModal() {
    if (_availableFilters.length === 0) await loadAvailableFilters();

    document.getElementById('pp-template-modal-title').textContent = t('postprocessing.add');
    document.getElementById('pp-template-form').reset();
    document.getElementById('pp-template-id').value = '';
    document.getElementById('pp-template-error').style.display = 'none';

    set_modalFilters([]);

    set_ppTemplateNameManuallyEdited(false);
    document.getElementById('pp-template-name').oninput = () => { set_ppTemplateNameManuallyEdited(true); };

    _populateFilterSelect();
    renderModalFilterList();

    const modal = document.getElementById('pp-template-modal');
    modal.style.display = 'flex';
    lockBody();
    setupBackdropClose(modal, closePPTemplateModal);
}

export async function editPPTemplate(templateId) {
    try {
        if (_availableFilters.length === 0) await loadAvailableFilters();

        const response = await fetchWithAuth(`/postprocessing-templates/${templateId}`);
        if (!response.ok) throw new Error(`Failed to load template: ${response.status}`);
        const tmpl = await response.json();

        document.getElementById('pp-template-modal-title').textContent = t('postprocessing.edit');
        document.getElementById('pp-template-id').value = templateId;
        document.getElementById('pp-template-name').value = tmpl.name;
        document.getElementById('pp-template-description').value = tmpl.description || '';
        document.getElementById('pp-template-error').style.display = 'none';

        set_modalFilters((tmpl.filters || []).map(fi => ({
            filter_id: fi.filter_id,
            options: { ...fi.options },
        })));

        _populateFilterSelect();
        renderModalFilterList();

        const modal = document.getElementById('pp-template-modal');
        modal.style.display = 'flex';
        lockBody();
        setupBackdropClose(modal, closePPTemplateModal);
    } catch (error) {
        console.error('Error loading PP template:', error);
        showToast(t('postprocessing.error.load') + ': ' + error.message, 'error');
    }
}

export async function savePPTemplate() {
    const templateId = document.getElementById('pp-template-id').value;
    const name = document.getElementById('pp-template-name').value.trim();
    const description = document.getElementById('pp-template-description').value.trim();
    const errorEl = document.getElementById('pp-template-error');

    if (!name) { showToast(t('postprocessing.error.required'), 'error'); return; }

    const payload = { name, filters: collectFilters(), description: description || null };

    try {
        let response;
        if (templateId) {
            response = await fetchWithAuth(`/postprocessing-templates/${templateId}`, { method: 'PUT', body: JSON.stringify(payload) });
        } else {
            response = await fetchWithAuth('/postprocessing-templates', { method: 'POST', body: JSON.stringify(payload) });
        }

        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || error.message || 'Failed to save template');
        }

        showToast(templateId ? t('postprocessing.updated') : t('postprocessing.created'), 'success');
        closePPTemplateModal();
        await loadPPTemplates();
    } catch (error) {
        console.error('Error saving PP template:', error);
        errorEl.textContent = error.message;
        errorEl.style.display = 'block';
    }
}

export async function deletePPTemplate(templateId) {
    const confirmed = await showConfirm(t('postprocessing.delete.confirm'));
    if (!confirmed) return;

    try {
        const response = await fetchWithAuth(`/postprocessing-templates/${templateId}`, { method: 'DELETE' });
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || error.message || 'Failed to delete template');
        }
        showToast(t('postprocessing.deleted'), 'success');
        await loadPPTemplates();
    } catch (error) {
        console.error('Error deleting PP template:', error);
        showToast(t('postprocessing.error.delete') + ': ' + error.message, 'error');
    }
}

export function closePPTemplateModal() {
    document.getElementById('pp-template-modal').style.display = 'none';
    set_modalFilters([]);
    unlockBody();
}

// Exported helpers used by other modules
export { updateCaptureDuration, buildTestStatsHtml };