// Reusable Firmware Upload Component
class FirmwareUploadComponent extends Component {
    constructor(container, viewModel, eventBus) {
        super(container, viewModel, eventBus);
        
        logger.debug('FirmwareUploadComponent: Constructor called');
        logger.debug('FirmwareUploadComponent: Container:', container);
        logger.debug('FirmwareUploadComponent: Container ID:', container?.id);
    }

    setupEventListeners() {
        // Setup firmware file input
        const firmwareFile = this.findElement('#firmware-file');
        if (firmwareFile) {
            this.addEventListener(firmwareFile, 'change', this.handleFileSelect.bind(this));
        }
        
        // Setup deploy button
        const deployBtn = this.findElement('#deploy-btn');
        if (deployBtn) {
            this.addEventListener(deployBtn, 'click', this.handleDeploy.bind(this));
        }
    }

    setupViewModelListeners() {
        this.subscribeToProperty('selectedFile', () => {
            this.updateFileInfo();
            this.updateDeployButton();
        });
        this.subscribeToProperty('isUploading', this.updateUploadState.bind(this));
        this.subscribeToProperty('uploadProgress', this.updateUploadProgress.bind(this));
        this.subscribeToProperty('uploadResults', this.updateUploadResults.bind(this));
    }

    mount() {
        super.mount();
        
        logger.debug('FirmwareUploadComponent: Mounting...');
        
        // Initialize UI state
        this.updateFileInfo();
        this.updateDeployButton();
        
        logger.debug('FirmwareUploadComponent: Mounted successfully');
    }

    render() {
        // Initial render is handled by the HTML template
        this.updateDeployButton();
    }

    handleFileSelect(event) {
        const file = event.target.files[0];
        this.viewModel.setSelectedFile(file);
    }

    async handleDeploy() {
        const file = this.viewModel.get('selectedFile');
        const targetNodes = this.viewModel.get('targetNodes');
        
        if (!file) {
            alert('Please select a firmware file first.');
            return;
        }
        
        if (!targetNodes || targetNodes.length === 0) {
            alert('No target nodes available for firmware update.');
            return;
        }
        
        try {
            this.viewModel.startUpload();
            
            // Show progress overlay to block UI interactions
            this.showProgressOverlay();
            
            const confirmed = confirm(`Upload firmware to ${targetNodes.length} node(s)?\n\nTarget nodes:\n${targetNodes.map(n => `• ${n.hostname || n.ip} (${n.ip})`).join('\n')}\n\nThis will update the firmware on all selected nodes.`);
            if (!confirmed) {
                this.viewModel.completeUpload();
                this.hideProgressOverlay();
                return;
            }
            
            // Show upload progress area
            this.showUploadProgress(file, targetNodes);
            
            // Start batch upload
            const results = await this.performBatchUpload(file, targetNodes);
            
            // Display results
            this.displayUploadResults(results);
            
            // Reset interface after successful upload
            this.viewModel.resetUploadState();
            
        } catch (error) {
            logger.error('Firmware deployment failed:', error);
            alert(`Deployment failed: ${error.message}`);
        } finally {
            this.viewModel.completeUpload();
            this.hideProgressOverlay();
        }
    }

    async performBatchUpload(file, nodes) {
        const results = [];
        const totalNodes = nodes.length;
        let successfulUploads = 0;
        
        for (let i = 0; i < nodes.length; i++) {
            const node = nodes[i];
            const nodeIp = node.ip;
            
            try {
                // Update progress
                this.updateNodeProgress(i + 1, totalNodes, nodeIp, 'Uploading...');
                
                // Upload to this node
                const result = await this.performSingleUpload(file, nodeIp);
                results.push(result);
                successfulUploads++;
                
                // Update progress
                this.updateNodeProgress(i + 1, totalNodes, nodeIp, 'Completed');
                this.updateOverallProgress(successfulUploads, totalNodes);
                
            } catch (error) {
                logger.error(`Failed to upload to node ${nodeIp}:`, error);
                const errorResult = {
                    nodeIp: nodeIp,
                    hostname: node.hostname || nodeIp,
                    success: false,
                    error: error.message,
                    timestamp: new Date().toISOString()
                };
                results.push(errorResult);
                
                // Update progress
                this.updateNodeProgress(i + 1, totalNodes, nodeIp, 'Failed');
                this.updateOverallProgress(successfulUploads, totalNodes);
            }
            
            // Small delay between uploads
            if (i < nodes.length - 1) {
                await new Promise(resolve => setTimeout(resolve, 1000));
            }
        }
        
        return results;
    }

    async performSingleUpload(file, nodeIp) {
        try {
            const result = await window.apiClient.uploadFirmware(file, nodeIp);
            
            return {
                nodeIp: nodeIp,
                hostname: nodeIp,
                success: true,
                result: result,
                timestamp: new Date().toISOString()
            };
            
        } catch (error) {
            throw new Error(`Upload to ${nodeIp} failed: ${error.message}`);
        }
    }

    showUploadProgress(file, nodes) {
        // Update the target nodes section header to show upload progress
        const targetNodesSection = this.findElement('.target-nodes-section');
        if (targetNodesSection) {
            const h3 = targetNodesSection.querySelector('h3');
            if (h3) {
                h3.innerHTML = `
                    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" width="16" height="16" style="margin-right:6px; vertical-align: -2px;">
                        <path d="M12 16V4"/>
                        <path d="M8 8l4-4 4 4"/>
                        <path d="M20 16v2a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2v-2"/>
                    </svg>
                    Firmware Upload Progress (${nodes.length} nodes)
                `;
            }
        }
        
        // Add progress info to the firmware-progress-container
        const container = this.findElement('#firmware-progress-container');
        if (container) {
            const progressHTML = `
                <div class="upload-progress-info">
                    <div class="overall-progress">
                        <div class="progress-bar-container">
                            <div class="progress-bar" id="overall-progress-bar" style="width: 0%; background-color: #fbbf24;"></div>
                        </div>
                        <span class="progress-text">0/${nodes.length} Successful (0%)</span>
                    </div>
                    <div class="progress-summary" id="progress-summary">
                        <span>Status: Preparing upload...</span>
                    </div>
                </div>
            `;
            container.innerHTML = progressHTML;
        }
        
        // Update existing target nodes to show upload status
        this.updateTargetNodesForUpload(nodes);
    }

    updateTargetNodesForUpload(nodes) {
        const targetNodesList = this.findElement('.target-nodes-list');
        if (!targetNodesList) return;
        
        // Update each target node item to show upload status
        targetNodesList.innerHTML = nodes.map(node => `
            <div class="target-node-item" data-node-ip="${node.ip}">
                <div class="node-info">
                    <span class="node-name">${node.hostname || node.ip}</span>
                    <span class="node-ip">${node.ip}</span>
                </div>
                <div class="node-status">
                    <span class="status-indicator pending">Pending...</span>
                </div>
            </div>
        `).join('');
    }

    updateNodeProgress(current, total, nodeIp, status) {
        const targetNodeItem = this.findElement(`[data-node-ip="${nodeIp}"]`);
        if (targetNodeItem) {
            const statusElement = targetNodeItem.querySelector('.status-indicator');
            
            if (statusElement) {
                statusElement.textContent = status;
                
                // Update status-specific styling
                statusElement.className = 'status-indicator';
                if (status === 'Completed') {
                    statusElement.classList.add('success');
                } else if (status === 'Failed') {
                    statusElement.classList.add('error');
                } else if (status === 'Uploading...') {
                    statusElement.classList.add('uploading');
                } else if (status === 'Pending...') {
                    statusElement.classList.add('pending');
                }
            }
        }
    }

    updateOverallProgress(successfulUploads, totalNodes) {
        const progressBar = this.findElement('#overall-progress-bar');
        const progressText = this.findElement('.progress-text');
        
        if (progressBar && progressText) {
            const successPercentage = Math.round((successfulUploads / totalNodes) * 100);
            progressBar.style.width = `${successPercentage}%`;
            progressText.textContent = `${successfulUploads}/${totalNodes} Successful (${successPercentage}%)`;
            
            // Update progress bar color based on completion
            if (successPercentage === 100) {
                progressBar.style.backgroundColor = '#4ade80';
            } else if (successPercentage > 50) {
                progressBar.style.backgroundColor = '#60a5fa';
            } else {
                progressBar.style.backgroundColor = '#fbbf24';
            }
            
            // Update progress summary for single-node uploads
            const progressSummary = this.findElement('#progress-summary');
            if (progressSummary && totalNodes === 1) {
                if (successfulUploads === 1) {
                    progressSummary.innerHTML = '<span>Status: Upload completed successfully</span>';
                } else if (successfulUploads === 0) {
                    progressSummary.innerHTML = '<span>Status: Upload failed</span>';
                }
            }
        }
    }

    displayUploadResults(results) {
        const progressHeader = this.findElement('.progress-header h3');
        const progressSummary = this.findElement('#progress-summary');
        
        if (progressHeader && progressSummary) {
            const successCount = results.filter(r => r.success).length;
            const totalCount = results.length;
            const successRate = Math.round((successCount / totalCount) * 100);
            
            if (totalCount === 1) {
                // Single node upload
                if (successCount === 1) {
                    progressHeader.textContent = `Firmware Upload Complete`;
                    progressSummary.innerHTML = `<span>${window.icon('success', { width: 14, height: 14 })} Upload to ${results[0].hostname || results[0].nodeIp} completed successfully at ${new Date().toLocaleTimeString()}</span>`;
                } else {
                    progressHeader.textContent = `Firmware Upload Failed`;
                    progressSummary.innerHTML = `<span>${window.icon('error', { width: 14, height: 14 })} Upload to ${results[0].hostname || results[0].nodeIp} failed at ${new Date().toLocaleTimeString()}</span>`;
                }
            } else if (successCount === totalCount) {
                // Multi-node upload - all successful
                progressHeader.textContent = `Firmware Upload Complete (${successCount}/${totalCount} Successful)`;
                progressSummary.innerHTML = `<span>${window.icon('success', { width: 14, height: 14 })} All uploads completed successfully at ${new Date().toLocaleTimeString()}</span>`;
            } else {
                // Multi-node upload - some failed
                progressHeader.textContent = `Firmware Upload Results (${successCount}/${totalCount} Successful)`;
                progressSummary.innerHTML = `<span>${window.icon('warning', { width: 14, height: 14 })} Upload completed with ${totalCount - successCount} failure(s) at ${new Date().toLocaleTimeString()}</span>`;
            }
        }
    }

    updateFileInfo() {
        const file = this.viewModel.get('selectedFile');
        const fileInfo = this.findElement('#file-info');
        
        if (file) {
            fileInfo.textContent = `${file.name} (${(file.size / 1024).toFixed(1)}KB)`;
            fileInfo.classList.add('has-file');
        } else {
            fileInfo.textContent = 'No file selected';
            fileInfo.classList.remove('has-file');
        }
        
        this.updateDeployButton();
    }

    updateDeployButton() {
        const deployBtn = this.findElement('#deploy-btn');
        if (deployBtn) {
            const file = this.viewModel.get('selectedFile');
            const targetNodes = this.viewModel.get('targetNodes');
            const isUploading = this.viewModel.get('isUploading');
            
            deployBtn.disabled = !file || !targetNodes || targetNodes.length === 0 || isUploading;
        }
    }

    updateUploadState() {
        const isUploading = this.viewModel.get('isUploading');
        const deployBtn = this.findElement('#deploy-btn');
        
        if (deployBtn) {
            deployBtn.disabled = isUploading;
            if (isUploading) {
                deployBtn.classList.add('loading');
                // Update button text while keeping the SVG icon
                const iconSvg = deployBtn.querySelector('svg');
                deployBtn.innerHTML = '';
                if (iconSvg) {
                    deployBtn.appendChild(iconSvg);
                }
                deployBtn.appendChild(document.createTextNode(' Deploying...'));
            } else {
                deployBtn.classList.remove('loading');
                // Restore original button content with SVG icon
                deployBtn.innerHTML = `
                    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" width="14" height="14" style="margin-right:6px; vertical-align: -2px;">
                        <path d="M12 16V4"/>
                        <path d="M8 8l4-4 4 4"/>
                        <path d="M20 16v2a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2v-2"/>
                    </svg>
                    Deploy
                `;
            }
        }
        
        this.updateDeployButton();
    }

    updateUploadProgress() {
        // This will be implemented when we add upload progress tracking
    }

    updateUploadResults() {
        // This will be implemented when we add upload results display
    }

    showProgressOverlay() {
        // Create overlay element that only covers the left side (main content area)
        const overlay = document.createElement('div');
        overlay.id = 'firmware-upload-overlay';
        overlay.className = 'firmware-upload-overlay';
        overlay.innerHTML = `
            <div class="overlay-content">
                <div class="overlay-spinner">
                    <svg class="spinner" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                        <path d="M12 2a10 10 0 1 1 0 20 10 10 0 0 1 0-20z"/>
                        <path d="M12 2a10 10 0 0 1 10 10"/>
                    </svg>
                </div>
                <div class="overlay-text">Firmware upload in progress...</div>
                <div class="overlay-subtext">Check the drawer for detailed progress</div>
            </div>
        `;
        
        // Add to body
        document.body.appendChild(overlay);
        
        // Check if drawer is open and adjust overlay accordingly
        const drawer = document.querySelector('.details-drawer');
        if (drawer && drawer.classList.contains('open')) {
            overlay.classList.add('drawer-open');
        }
        
        // Block ESC key during upload
        this.blockEscapeKey();
        
        // Block drawer close button during upload
        this.blockDrawerCloseButton();
        
        // Block choose file button during upload
        this.blockChooseFileButton();
        
        
        // Store reference for cleanup
        this.progressOverlay = overlay;
    }

    blockDrawerCloseButton() {
        // Find the drawer close button
        const closeButton = document.querySelector('.drawer-close');
        if (closeButton) {
            // Store original state
            this.originalCloseButtonDisabled = closeButton.disabled;
            this.originalCloseButtonStyle = closeButton.style.cssText;
            
            // Disable the close button
            closeButton.disabled = true;
            closeButton.style.opacity = '0.5';
            closeButton.style.cursor = 'not-allowed';
            closeButton.style.pointerEvents = 'none';
            
            // Add visual indicator that it's disabled
            closeButton.title = 'Cannot close during firmware upload';
        }
    }

    unblockDrawerCloseButton() {
        // Restore the drawer close button
        const closeButton = document.querySelector('.drawer-close');
        if (closeButton) {
            // Restore original state
            closeButton.disabled = this.originalCloseButtonDisabled || false;
            closeButton.style.cssText = this.originalCloseButtonStyle || '';
            closeButton.title = 'Close';
        }
    }

    blockChooseFileButton() {
        // Find the choose file button
        const chooseFileButton = document.querySelector('.upload-btn-compact');
        if (chooseFileButton) {
            // Store original state
            this.originalChooseFileButtonDisabled = chooseFileButton.disabled;
            this.originalChooseFileButtonStyle = chooseFileButton.style.cssText;
            
            // Disable the choose file button
            chooseFileButton.disabled = true;
            chooseFileButton.style.opacity = '0.5';
            chooseFileButton.style.cursor = 'not-allowed';
            chooseFileButton.style.pointerEvents = 'none';
            
            // Add visual indicator that it's disabled
            chooseFileButton.title = 'Cannot change file during upload';
        }
    }

    unblockChooseFileButton() {
        // Restore the choose file button
        const chooseFileButton = document.querySelector('.upload-btn-compact');
        if (chooseFileButton) {
            // Restore original state
            chooseFileButton.disabled = this.originalChooseFileButtonDisabled || false;
            chooseFileButton.style.cssText = this.originalChooseFileButtonStyle || '';
            chooseFileButton.title = 'Choose File';
        }
    }

    hideTargetNodesSection() {
        // Find the target nodes section
        const targetNodesSection = document.querySelector('.target-nodes-section');
        if (targetNodesSection) {
            // Store original state
            this.originalTargetNodesSectionDisplay = targetNodesSection.style.display;
            
            // Hide the target nodes section
            targetNodesSection.style.display = 'none';
        }
    }

    showTargetNodesSection() {
        // Restore the target nodes section
        const targetNodesSection = document.querySelector('.target-nodes-section');
        if (targetNodesSection) {
            // Restore original state
            targetNodesSection.style.display = this.originalTargetNodesSectionDisplay || '';
        }
    }

    blockEscapeKey() {
        // Create a keydown event listener that prevents ESC from closing the drawer
        this.escapeKeyHandler = (event) => {
            if (event.key === 'Escape') {
                event.preventDefault();
                event.stopPropagation();
                event.stopImmediatePropagation();
                return false;
            }
        };
        
        // Add the event listener with capture=true to intercept before drawer's handler
        document.addEventListener('keydown', this.escapeKeyHandler, true);
    }

    unblockEscapeKey() {
        // Remove the ESC key blocker
        if (this.escapeKeyHandler) {
            document.removeEventListener('keydown', this.escapeKeyHandler, true);
            this.escapeKeyHandler = null;
        }
    }

    hideProgressOverlay() {
        if (this.progressOverlay) {
            this.progressOverlay.remove();
            this.progressOverlay = null;
        }
        
        // Unblock ESC key
        this.unblockEscapeKey();
        
        // Unblock drawer close button
        this.unblockDrawerCloseButton();
        
        // Unblock choose file button
        this.unblockChooseFileButton();
        
    }
}

window.FirmwareUploadComponent = FirmwareUploadComponent;