import { ControlWavePlugin } from '../plugin-loader.js';

export default class SignXPlugin extends ControlWavePlugin {
    constructor() {
        super({
            id: 'signx-inference',
            name: 'SignX',
            version: '1.0.0',
            author: 'ControlWave Team',
            description: 'Sign language recognition inference powered by SignX',
            needsViser: false,
            order: 100
        });

        this.currentVideoPath = null;
        this.isInferring = false;
        this.videoEl = null;
        this.logsPre = null;
        this.currentJobId = null;
        this.logCursor = 0;
        this.logPollingTimer = null;
        this.runButtonOriginalText = null;
    }

    async render(container) {
        container.innerHTML = '';
        container.className = 'tab-content active';

        // Inject styles
        const style = document.createElement('style');
        style.textContent = `
            .signx-root {
                display: flex;
                flex-direction: column;
                gap: 20px;
                width: 100%;
                height: 100%;
                padding: 20px;
                box-sizing: border-box;
            }

            .signx-top {
                display: flex;
                gap: 20px;
                width: 100%;
                flex: 1;
            }

            .signx-left, .signx-right, .signx-bottom {
                background: #fff;
                border-radius: 12px;
                box-shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
                padding: 20px;
                display: flex;
                flex-direction: column;
            }

            .signx-left {
                flex: 1.2;
            }

            .signx-right {
                flex: 1;
                overflow-y: auto;
            }

            .signx-bottom {
                width: 100%;
                min-height: 200px;
            }

            .signx-video-frame {
                position: relative;
                width: 100%;
                padding-top: 56.25%;
                background: #0f172a;
                border-radius: 10px;
                overflow: hidden;
            }

            .signx-bottom-title {
                font-size: 18px;
                font-weight: 600;
                color: #0f172a;
                margin-bottom: 12px;
            }

            .signx-results-grid {
                display: grid;
                grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
                gap: 16px;
                width: 100%;
            }

            .signx-results-grid .signx-result-section {
                margin: 0;
            }

            .signx-result-section.full-width {
                grid-column: 1 / -1;
            }

            @media (max-width: 1200px) {
                .signx-top {
                    flex-direction: column;
                }
                .signx-results-grid {
                    grid-template-columns: 1fr;
                }
            }

            .signx-video-frame video {
                position: absolute;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                object-fit: contain;
                background: #0f172a;
            }

            .signx-video-placeholder {
                position: absolute;
                inset: 0;
                display: flex;
                align-items: center;
                justify-content: center;
                color: #94a3b8;
                font-size: 15px;
                text-align: center;
                padding: 20px;
            }

            .signx-video-controls {
                margin-top: 15px;
                display: flex;
                gap: 10px;
                flex-direction: column;
            }

            .signx-section-title {
                font-size: 18px;
                font-weight: 600;
                color: #0f172a;
                margin-bottom: 16px;
                padding-bottom: 10px;
                border-bottom: 2px solid #2196F3;
            }

            .signx-form-group {
                margin-bottom: 15px;
            }

            .signx-form-group label {
                display: block;
                margin-bottom: 5px;
                font-weight: 500;
                color: #475569;
                font-size: 13px;
            }

            .signx-form-group select {
                width: 100%;
                padding: 8px 12px;
                border: 1px solid #cbd5e1;
                border-radius: 6px;
                font-size: 14px;
                background: white;
                cursor: pointer;
                transition: all 0.2s;
            }

            .signx-form-group select:focus {
                outline: none;
                border-color: #2196F3;
                box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
            }

            .signx-btn {
                width: 100%;
                padding: 10px 20px;
                border: none;
                border-radius: 6px;
                font-size: 14px;
                font-weight: 500;
                cursor: pointer;
                transition: all 0.2s;
            }

            .signx-btn-primary {
                background: #2196F3;
                color: white;
            }

            .signx-btn-primary:hover:not(:disabled) {
                background: #1976D2;
                transform: translateY(-1px);
                box-shadow: 0 4px 8px rgba(33, 150, 243, 0.3);
            }

            .signx-btn:disabled {
                background: #cbd5e1;
                cursor: not-allowed;
                opacity: 0.6;
            }

            .signx-status {
                margin-top: 20px;
                padding: 12px 15px;
                background: #f1f5f9;
                border-radius: 6px;
                border-left: 3px solid #2196F3;
                font-size: 13px;
                line-height: 1.6;
            }

            .signx-status.info {
                border-left-color: #2196F3;
                background: #E3F2FD;
            }

            .signx-status.success {
                border-left-color: #4CAF50;
                background: #E8F5E9;
            }

            .signx-status.error {
                border-left-color: #f44336;
                background: #FFEBEE;
            }

            .signx-status.loading {
                border-left-color: #FF9800;
                background: #FFF3E0;
            }

            .signx-logs {
                margin-top: 20px;
            }

            .signx-logs pre {
                background: #0f172a;
                color: #cbd5e1;
                border-radius: 8px;
                padding: 14px;
                font-size: 12px;
                line-height: 1.6;
                max-height: 400px;
                overflow-y: auto;
                white-space: pre-wrap;
                word-wrap: break-word;
                font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
            }

            .signx-result-section {
                margin-top: 20px;
                padding: 15px;
                background: #f8fafc;
                border-radius: 8px;
                border: 1px solid #e2e8f0;
            }

            .signx-result-section h4 {
                margin: 0 0 10px 0;
                color: #0f172a;
                font-size: 14px;
                font-weight: 600;
            }

            .signx-result-content {
                font-family: monospace;
                font-size: 13px;
                line-height: 1.6;
                color: #1e293b;
                background: white;
                padding: 10px;
                border-radius: 4px;
                max-height: 150px;
                overflow-y: auto;
            }

            .spinner {
                display: inline-block;
                width: 14px;
                height: 14px;
                border: 2px solid #f3f3f3;
                border-top: 2px solid #2196F3;
                border-radius: 50%;
                animation: spin 1s linear infinite;
                margin-right: 8px;
                vertical-align: middle;
            }

            @keyframes spin {
                0% { transform: rotate(0deg); }
                100% { transform: rotate(360deg); }
            }

            .signx-analysis-item {
                margin-top: 20px;
                padding-top: 20px;
                border-top: 1px solid #e2e8f0;
            }

            .signx-analysis-item:first-child {
                margin-top: 0;
                padding-top: 0;
                border-top: none;
            }

            .signx-analysis-item h5 {
                margin: 0 0 10px 0;
                color: #475569;
                font-size: 13px;
                font-weight: 600;
            }

            .signx-analysis-item img {
                display: block;
                max-width: 100%;
                height: auto;
                border: 1px solid #e2e8f0;
                border-radius: 4px;
                transition: transform 0.2s, box-shadow 0.2s;
            }

            .signx-analysis-item img:hover {
                transform: scale(1.02);
                box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            }

            .signx-link-button {
                display: inline-block;
                padding: 8px 16px;
                background: #2196F3;
                color: white;
                text-decoration: none;
                border-radius: 4px;
                font-size: 13px;
                font-weight: 500;
                transition: background 0.2s;
            }

            .signx-link-button:hover {
                background: #1976D2;
            }

            .signx-keyframes-grid {
                display: grid;
                grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
                gap: 10px;
                margin-top: 10px;
            }

            .signx-keyframe-preview {
                text-align: center;
            }

            .signx-keyframe-preview img {
                width: 100%;
                height: auto;
                border: 1px solid #e2e8f0;
                border-radius: 4px;
            }

            .signx-keyframe-preview span {
                display: block;
                margin-top: 4px;
                font-size: 11px;
                color: #64748b;
            }
        `;

        container.appendChild(style);

        // Build layout
        const root = document.createElement('div');
        root.className = 'signx-root';
        root.innerHTML = `
            <div class="signx-top">
                <div class="signx-left">
                    <h3 class="signx-section-title">Video Preview</h3>
                    <div class="signx-video-frame">
                        <video id="signx-video" controls loop></video>
                        <div class="signx-video-placeholder" id="signx-video-placeholder">
                            Select a video to preview it here
                        </div>
                    </div>
                    <div class="signx-video-controls">
                        <div class="signx-form-group">
                            <label>Video Folder</label>
                            <select id="signx-video-folder">
                                <option value="videos">videos (test)</option>
                                <option value="good_videos" selected>good_videos (recommended)</option>
                            </select>
                        </div>
                        <div class="signx-form-group">
                            <label>Video File</label>
                            <select id="signx-video-file">
                                <option value="">Loading...</option>
                            </select>
                        </div>
                        <button id="signx-run-inference" class="signx-btn signx-btn-primary" disabled>
                            Run Inference
                        </button>
                    </div>
                </div>

                <div class="signx-right">
                    <h3 class="signx-section-title">Status & Logs</h3>

                    <div id="signx-status" class="signx-status info">
                        Select a video file to begin
                    </div>

                    <div class="signx-logs">
                        <label style="display: block; margin-bottom: 8px; font-weight: 600; color: #475569; font-size: 13px;">
                            Inference Logs
                        </label>
                        <pre id="signx-logs">(waiting for inference job...)</pre>
                    </div>
                </div>
            </div>

            <div class="signx-bottom">
                <div class="signx-bottom-title">Inference Outputs & Visualizations</div>
                <div id="signx-results-container" class="signx-results-grid"></div>
            </div>
        `;

        container.appendChild(root);

        // Cache element references
        this.videoEl = document.getElementById('signx-video');
        this.videoPlaceholder = document.getElementById('signx-video-placeholder');
        this.logsPre = document.getElementById('signx-logs');

        // Hide video until a file is selected
        if (this.videoEl) {
            this.videoEl.style.display = 'none';
        }

        // Register event listeners
        this.setupEventListeners();

        // Initial load of video options
        this.loadVideoList();
    }

    setupEventListeners() {
        const folderSelect = document.getElementById('signx-video-folder');
        const fileSelect = document.getElementById('signx-video-file');
        const runButton = document.getElementById('signx-run-inference');

        if (folderSelect) {
            folderSelect.addEventListener('change', () => {
                this.loadVideoList();
            });
        }

        if (fileSelect) {
            fileSelect.addEventListener('change', (e) => {
                this.currentVideoPath = e.target.value;
                const runButton = document.getElementById('signx-run-inference');
                if (runButton) {
                    runButton.disabled = !this.currentVideoPath;
                }

                if (this.currentVideoPath) {
                    this.updateStatus('Selected video: ' + this.currentVideoPath.split('/').pop(), 'info');
                    this.updateVideo(this.currentVideoPath);
                }
            });
        }

        if (runButton) {
            runButton.addEventListener('click', () => {
                this.runInference();
            });
        }
    }

    async loadVideoList() {
        const folderSelect = document.getElementById('signx-video-folder');
        const fileSelect = document.getElementById('signx-video-file');

        if (!folderSelect || !fileSelect) {
            console.error('SignX: unable to locate folder or file selectors');
            return;
        }

        const folder = folderSelect.value;
        console.log(`SignX: loading video list, folder=${folder}`);
        fileSelect.innerHTML = '<option value="">Loading...</option>';

        try {
            const data = await this.sendPluginMessage('list_videos', { folder: folder });

            console.log('SignX: received response:', data);

            if (data && data.status === 'success') {
                fileSelect.innerHTML = '<option value="">Select a video file</option>';

                if (data.videos && data.videos.length > 0) {
                    data.videos.forEach(video => {
                        const option = document.createElement('option');
                        option.value = video.path;
                        option.textContent = video.name;
                        fileSelect.appendChild(option);
                    });
                    console.log(`SignX: loaded ${data.videos.length} videos`);
                    this.updateStatus(`Found ${data.videos.length} video files`, 'info');
                } else {
                    console.warn('SignX: video list is empty');
                    this.updateStatus('No video files found', 'info');
                }
            } else {
                console.error('SignX: response status not success:', data);
                fileSelect.innerHTML = '<option value="">Failed to load</option>';
                this.updateStatus('Failed to load video list: ' + (data ? data.message : 'Unknown error'), 'error');
            }
        } catch (error) {
            console.error('SignX: error while loading videos:', error);
            fileSelect.innerHTML = '<option value="">Failed to load</option>';
            this.updateStatus('Failed to load video list: ' + error.message, 'error');
        }
    }

    async updateVideo(videoPath) {
        if (!this.videoEl || !this.videoPlaceholder) {
            return;
        }

        try {
            const videoUrl = videoPath.replace(/.*\/plugins\/SignX/, '/plugins/SignX');

            console.log('SignX: loading video URL:', videoUrl);

            this.videoEl.src = videoUrl;
            this.videoEl.style.display = 'block';
            this.videoPlaceholder.style.display = 'none';

            this.videoEl.onloadeddata = () => {
                console.log('SignX: video loaded');
            };

            this.videoEl.onerror = () => {
                this.videoEl.style.display = 'none';
                this.videoPlaceholder.style.display = 'flex';
                this.videoPlaceholder.textContent = 'Video failed to load';
                console.error('SignX: failed to load video URL:', videoUrl);
            };

            this.videoEl.load();
        } catch (error) {
            this.videoEl.style.display = 'none';
            this.videoPlaceholder.style.display = 'flex';
            this.videoPlaceholder.textContent = 'Video failed to load';
            console.error('SignX: video load error:', error);
        }
    }

    async runInference() {
        if (!this.currentVideoPath || this.isInferring) {
            return;
        }

        const runButton = document.getElementById('signx-run-inference');
        if (!runButton) {
            return;
        }

        this.isInferring = true;
        this.runButtonOriginalText = runButton.innerHTML;
        runButton.disabled = true;
        runButton.innerHTML = '<span class="spinner"></span>Running...';

        this.updateStatus('Running SignX inference. This may take a few minutes...', 'loading');
        if (this.logsPre) {
            this.logsPre.textContent = 'Starting inference...\n';
        }

        try {
            const response = await this.sendPluginMessage('run_inference', {
                video_path: this.currentVideoPath
            });

            if (response.status === 'running' && response.job_id) {
                this.currentJobId = response.job_id;
                this.logCursor = 0;
                this.startLogPolling();
                return;
            }

            if (response.status === 'success') {
                this.updateStatus('Inference complete!', 'success');
                this.displayResults(response);
            } else {
                const errMsg = response.message || 'Unknown error';
                this.updateStatus('Inference failed: ' + errMsg, 'error');
                if (response.logs && this.logsPre) {
                    this.logsPre.textContent = Array.isArray(response.logs) ? response.logs.join('\n') : response.logs;
                }
            }
        } catch (error) {
            console.error('SignX: inference failed:', error);
            this.updateStatus('Inference failed: ' + error.message, 'error');
            if (this.logsPre) {
                this.logsPre.textContent = error.message;
            }
        } finally {
            if (!this.currentJobId) {
                this.resetRunButton();
                this.stopLogPolling();
            }
        }
    }

    startLogPolling() {
        this.stopLogPolling();
        this.pollJobStatus();
        this.logPollingTimer = setInterval(() => {
            this.pollJobStatus();
        }, 1200);
    }

    stopLogPolling() {
        if (this.logPollingTimer) {
            clearInterval(this.logPollingTimer);
            this.logPollingTimer = null;
        }
    }

    async pollJobStatus() {
        if (!this.currentJobId) {
            return;
        }

        try {
            const response = await this.sendPluginMessage('get_job_status', {
                job_id: this.currentJobId,
                last_index: this.logCursor
            });

            if (response.status !== 'success') {
                throw new Error(response.message || 'Failed to fetch job status');
            }

            if (Array.isArray(response.logs) && response.logs.length > 0) {
                this.appendLogs(response.logs);
            }

            if (typeof response.next_index === 'number') {
                this.logCursor = response.next_index;
            } else if (response.logs) {
                this.logCursor += response.logs.length;
            }

            const jobStatus = response.job_status;
            if (jobStatus === 'success' && response.result) {
                this.updateStatus('Inference complete!', 'success');
                this.displayResults(response.result);
                this.finishCurrentJob();
            } else if (jobStatus === 'error') {
                const errMsg = response.error_message || 'Inference failed';
                this.updateStatus(`Inference failed: ${errMsg}`, 'error');
                this.finishCurrentJob();
            } else if (jobStatus === 'running') {
                this.updateStatus('Running inference...', 'loading');
            }
        } catch (error) {
            console.error('SignX: failed to poll job status', error);
            this.updateStatus(`Log polling failed: ${error.message}`, 'error');
            this.finishCurrentJob();
        }
    }

    appendLogs(newLines) {
        if (!this.logsPre || !newLines) {
            return;
        }

        const text = Array.isArray(newLines) ? newLines.join('\n') : newLines;
        if (!text) {
            return;
        }

        if (!this.logsPre.textContent || this.logsPre.textContent === '(waiting for inference job...)') {
            this.logsPre.textContent = '';
        }

        if (this.logsPre.textContent && !this.logsPre.textContent.endsWith('\n')) {
            this.logsPre.textContent += '\n';
        }

        this.logsPre.textContent += text + '\n';
        this.logsPre.scrollTop = this.logsPre.scrollHeight;
    }

    resetRunButton() {
        const runButton = document.getElementById('signx-run-inference');
        if (runButton) {
            runButton.disabled = false;
            runButton.innerHTML = this.runButtonOriginalText || 'Run Inference';
        }
        this.runButtonOriginalText = null;
        this.isInferring = false;
    }

    finishCurrentJob() {
        this.stopLogPolling();
        this.currentJobId = null;
        this.resetRunButton();
    }

    displayResults(data) {
        const resultsContainer = document.getElementById('signx-results-container');

        if (!resultsContainer) return;

        resultsContainer.innerHTML = '';

        if (data.logs && data.logs.length > 0 && this.logsPre && !this.logsPre.textContent) {
            this.logsPre.textContent = data.logs.join('\n');
        }

        if (data.output_clean) {
            resultsContainer.appendChild(
                this.createResultCard(
                    'Recognition Result (Gloss Sequence)',
                    this.escapeHtml(data.output_clean)
                )
            );
        }

        if (data.execution_time) {
            resultsContainer.appendChild(
                this.createResultCard(
                    'Execution Time',
                    `${data.execution_time.toFixed(2)} s`
                )
            );
        }

        if (data.translation_path) {
            resultsContainer.appendChild(
                this.createResultCard(
                    'Translation File',
                    `<code>${this.escapeHtml(data.translation_path)}</code>`
                )
            );
        }

        if (data.analysis_images && data.analysis_images.length > 0) {
            data.analysis_images.forEach(file => {
                const card = document.createElement('div');
                card.className = 'signx-result-section';
                if (file.type === 'keyframes') {
                    card.classList.add('full-width');
                }

                let body = '';
                if (file.type === 'image') {
                    body = `
                        <img src="${file.url}"
                             alt="${file.name}"
                             onclick="window.open('${file.url}', '_blank')"
                             style="cursor: pointer; max-width: 100%; border-radius: 6px;">
                    `;
                } else if (file.type === 'html') {
                    body = `
                        <a href="${file.url}" target="_blank" class="signx-link-button">
                            Open interactive visualization →
                        </a>
                    `;
                } else if (file.type === 'keyframes') {
                    const previews = (file.previews || []).map(preview => `
                        <div class="signx-keyframe-preview">
                            <img src="${preview.url}" alt="${preview.name}"
                                 onclick="window.open('${preview.url}', '_blank')"
                                 style="cursor: pointer;">
                            <span>${preview.name}</span>
                        </div>
                    `).join('');
                    body = `
                        <div class="signx-keyframes-grid">
                            ${previews || '<span>No keyframes available.</span>'}
                        </div>
                    `;
                }

                card.innerHTML = `
                    <h4>${file.name}</h4>
                    <div class="signx-result-content">
                        ${body}
                    </div>
                `;
                resultsContainer.appendChild(card);
            });
        }

        if (data.analysis_dir) {
            resultsContainer.appendChild(
                this.createResultCard(
                    'Full Analysis Path',
                    `<code>${this.escapeHtml(data.analysis_dir)}</code>`,
                    { fullWidth: true }
                )
            );
        }
    }

    updateStatus(message, type = 'info') {
        const statusBox = document.getElementById('signx-status');
        if (!statusBox) return;

        statusBox.className = 'signx-status ' + type;

        if (type === 'loading') {
            statusBox.innerHTML = `<span class="spinner"></span>${message}`;
        } else {
            statusBox.textContent = message;
        }
    }

    escapeHtml(text) {
        const div = document.createElement('div');
        div.textContent = text;
        return div.innerHTML;
    }

    /**
     * Send a plugin request over the shared WebSocket
     */
    async sendPluginMessage(action, data) {
        if (!window.controlWaveWebSocket || !window.controlWaveWebSocket.isConnected) {
            throw new Error('WebSocket not connected');
        }

        console.log(`SignX: sending request action=${action}`, data);

        const response = await window.controlWaveWebSocket.sendRequest('signx', {
            action: action,
            data: data
        });

        console.log('SignX: received response', response);
        return response;
    }

    createResultCard(title, contentHtml, options = {}) {
        const card = document.createElement('div');
        card.className = 'signx-result-section';
        if (options.fullWidth) {
            card.classList.add('full-width');
        }
        card.innerHTML = `
            <h4>${title}</h4>
            <div class="signx-result-content">${contentHtml}</div>
        `;
        return card;
    }
}