// Simplified Discovery Integration
// Updated for simplified signal names + tags architecture

console.log('=== DISCOVERY.JS FILE LOADED - START ===');

class SimplifiedProtocolDiscovery {
    constructor() {
        this.currentScanId = 'simplified-scan-123';
        this.isScanning = false;
    }

    init() {
        console.log('Discovery.js: init() called');
        try {
            this.bindDiscoveryEvents();
            console.log('Discovery.js: bindDiscoveryEvents() completed successfully');
        } catch (error) {
            console.error('Discovery.js: Error in init():', error);
        }
    }

    bindDiscoveryEvents() {
        console.log('Binding discovery events...');
        
        // Discovery scan button
        const startScanBtn = document.getElementById('start-discovery-scan');
        console.log('Start scan button:', startScanBtn);
        if (startScanBtn) {
            startScanBtn.addEventListener('click', () => {
                console.log('Start Discovery Scan button clicked!');
                this.startDiscoveryScan();
            });
        } else {
            console.error('Start scan button not found!');
        }

        // Check if discovery results container exists
        const resultsContainer = document.getElementById('discovery-results');
        console.log('Discovery results container during init:', resultsContainer);

        // Auto-fill signal form from discovery
        console.log('Setting up global click event listener for use-signal-btn');
        try {
            const self = this; // Capture 'this' context
            document.addEventListener('click', function(e) {
                console.log('Global click event fired, target:', e.target.tagName, 'classes:', e.target.className);
                console.log('Target dataset:', e.target.dataset);
                
                if (e.target.classList.contains('use-signal-btn')) {
                    console.log('Use This Signal button clicked!');
                    console.log('Signal index from dataset:', e.target.dataset.signalIndex);
                    self.useDiscoveredEndpoint(e.target.dataset.signalIndex);
                } else {
                    console.log('Clicked element is not a use-signal-btn');
                }
            });
            console.log('Global click event listener set up successfully');
        } catch (error) {
            console.error('Error setting up event listener:', error);
        }
    }

    async useDiscoveredEndpoint(signalIndex) {
        console.log('Using discovered endpoint with index:', signalIndex);
        
        // Get the actual discovered endpoints from the mock scan
        const discoveredEndpoints = await this.mockDiscoveryScan('192.168.1.0/24');
        
        // Map signal index to endpoint
        const endpoint = discoveredEndpoints[signalIndex];
        if (!endpoint) {
            this.showNotification(`Endpoint with index ${signalIndex} not found`, 'error');
            return;
        }
        
        // Convert to simplified signal format
        const signalData = this.convertEndpointToSignal(endpoint);
        
        // Auto-populate the signal form with retry logic
        this.autoPopulateSignalFormWithRetry(signalData);
        
        this.showNotification(`Endpoint ${endpoint.device_name} selected for signal creation`, 'success');
    }
    
    autoPopulateSignalFormWithRetry(signalData, retryCount = 0) {
        console.log('Attempting to auto-populate signal form, attempt:', retryCount + 1);
        
        if (typeof window.autoPopulateSignalForm === 'function') {
            console.log('Found window.autoPopulateSignalForm, calling it...');
            window.autoPopulateSignalForm(signalData);
        } else {
            console.error('autoPopulateSignalForm function not found');
            
            // Retry after a delay if we haven't exceeded max retries
            if (retryCount < 5) {
                console.log(`Retrying in 500ms... (${retryCount + 1}/5)`);
                setTimeout(() => {
                    this.autoPopulateSignalFormWithRetry(signalData, retryCount + 1);
                }, 500);
            } else {
                console.error('Max retries exceeded, autoPopulateSignalForm function still not found');
                this.showNotification('Error: Could not open signal form. Please ensure the protocol mapping system is loaded.', 'error');
            }
        }
    }

    convertEndpointToSignal(endpoint) {
        // Generate human-readable signal name
        const signalName = `${endpoint.device_name} ${endpoint.data_point}`;
        
        // Generate meaningful tags
        const tags = [
            `device:${endpoint.device_name.toLowerCase().replace(/[^a-z0-9]/g, '_')}`,
            `protocol:${endpoint.protocol_type}`,
            `data_point:${endpoint.data_point.toLowerCase().replace(/[^a-z0-9]/g, '_')}`,
            'discovered:true'
        ];
        
        // Add device-specific tags
        if (endpoint.device_name.toLowerCase().includes('pump')) {
            tags.push('equipment:pump');
        }
        if (endpoint.device_name.toLowerCase().includes('sensor')) {
            tags.push('equipment:sensor');
        }
        if (endpoint.device_name.toLowerCase().includes('controller')) {
            tags.push('equipment:controller');
        }
        
        // Add protocol-specific tags
        if (endpoint.protocol_type === 'modbus_tcp') {
            tags.push('interface:modbus');
        } else if (endpoint.protocol_type === 'opcua') {
            tags.push('interface:opcua');
        }
        
        // Generate database source
        const dbSource = `measurements.${endpoint.device_name.toLowerCase().replace(/[^a-z0-9]/g, '_')}_${endpoint.data_point.toLowerCase().replace(/[^a-z0-9]/g, '_')}`;
        
        return {
            signal_name: signalName,
            tags: tags,
            protocol_type: endpoint.protocol_type,
            protocol_address: endpoint.protocol_address,
            db_source: dbSource
        };
    }


    // Start discovery scan
    async startDiscoveryScan() {
        console.log('Starting discovery scan...');
        
        // Update UI
        const startBtn = document.getElementById('start-discovery-scan');
        const stopBtn = document.getElementById('stop-discovery-scan');
        const statusDiv = document.getElementById('discovery-status');
        
        if (startBtn) startBtn.disabled = true;
        if (stopBtn) stopBtn.disabled = false;
        if (statusDiv) {
            statusDiv.innerHTML = '<div class="alert alert-info"><i class="fas fa-search"></i> Discovery scan in progress...</div>';
        }
        
        try {
            // Run discovery
            const results = await this.discoverAndSuggestSignals();
            
            // Update status
            if (statusDiv) {
                statusDiv.innerHTML = `<div class="alert alert-success"><i class="fas fa-check"></i> Discovery complete. Found ${results.length} devices.</div>`;
            }
            
            this.showNotification(`Discovery complete. Found ${results.length} devices.`, 'success');
            
        } catch (error) {
            console.error('Discovery scan failed:', error);
            if (statusDiv) {
                statusDiv.innerHTML = '<div class="alert alert-error"><i class="fas fa-exclamation-triangle"></i> Discovery scan failed</div>';
            }
            this.showNotification('Discovery scan failed', 'error');
        } finally {
            // Reset UI
            if (startBtn) startBtn.disabled = false;
            if (stopBtn) stopBtn.disabled = true;
        }
    }

    // Advanced discovery features
    async discoverAndSuggestSignals(networkRange = '192.168.1.0/24') {
        console.log(`Starting discovery scan on ${networkRange}`);
        this.isScanning = true;
        
        try {
            // Mock discovery results
            const discoveredEndpoints = await this.mockDiscoveryScan(networkRange);
            
            // Convert to suggested signals
            const suggestedSignals = discoveredEndpoints.map(endpoint => 
                this.convertEndpointToSignal(endpoint)
            );
            
            this.displayDiscoveryResults(suggestedSignals);
            this.isScanning = false;
            
            return suggestedSignals;
            
        } catch (error) {
            console.error('Discovery scan failed:', error);
            this.showNotification('Discovery scan failed', 'error');
            this.isScanning = false;
            return [];
        }
    }

    async mockDiscoveryScan(networkRange) {
        // Simulate network discovery delay
        await new Promise(resolve => setTimeout(resolve, 2000));
        
        // Return mock discovered endpoints
        return [
            {
                device_id: 'discovered_001',
                protocol_type: 'modbus_tcp',
                device_name: 'Booster Pump',
                address: '192.168.1.110',
                port: 502,
                data_point: 'Flow Rate',
                protocol_address: '30002'
            },
            {
                device_id: 'discovered_002',
                protocol_type: 'modbus_tcp',
                device_name: 'Level Sensor',
                address: '192.168.1.111',
                port: 502,
                data_point: 'Tank Level',
                protocol_address: '30003'
            },
            {
                device_id: 'discovered_003',
                protocol_type: 'opcua',
                device_name: 'PLC Controller',
                address: '192.168.1.112',
                port: 4840,
                data_point: 'System Status',
                protocol_address: 'ns=2;s=SystemStatus'
            }
        ];
    }

    displayDiscoveryResults(suggestedSignals) {
        console.log('Displaying discovery results:', suggestedSignals);
        const resultsContainer = document.getElementById('discovery-results');
        if (!resultsContainer) {
            console.error('Discovery results container not found!');
            this.showNotification('Discovery results container not found', 'error');
            return;
        }
        
        console.log('Found discovery results container:', resultsContainer);
        resultsContainer.innerHTML = '<h3>Discovery Results</h3>';
        
        suggestedSignals.forEach((signal, index) => {
            const signalCard = document.createElement('div');
            signalCard.className = 'discovery-result-card';
            signalCard.innerHTML = `
                <div class="signal-info">
                    <strong>${signal.signal_name}</strong>
                    <div class="signal-tags">
                        ${signal.tags.map(tag => `<span class="tag">${tag}</span>`).join('')}
                    </div>
                    <div class="signal-details">
                        <span>Protocol: ${signal.protocol_type}</span>
                        <span>Address: ${signal.protocol_address}</span>
                    </div>
                </div>
                <button class="use-signal-btn" data-signal-index="${index}">
                    Use This Signal
                </button>
            `;
            
            resultsContainer.appendChild(signalCard);
        });
        
        // Add event listeners for use buttons
        console.log('Adding event listener to results container');
        console.log('Results container:', resultsContainer);
        console.log('Results container ID:', resultsContainer.id);
        console.log('Number of use-signal-btn elements:', resultsContainer.querySelectorAll('.use-signal-btn').length);
        
        const clickHandler = (e) => {
            console.log('Discovery results container clicked:', e.target);
            console.log('Button classes:', e.target.classList);
            console.log('Button tag name:', e.target.tagName);
            if (e.target.classList.contains('use-signal-btn')) {
                console.log('Use This Signal button clicked!');
                const signalIndex = parseInt(e.target.dataset.signalIndex);
                console.log('Signal index:', signalIndex);
                const signal = suggestedSignals[signalIndex];
                console.log('Signal data:', signal);
                
                // Use the global function directly
                if (typeof window.autoPopulateSignalForm === 'function') {
                    window.autoPopulateSignalForm(signal);
                } else {
                    console.error('autoPopulateSignalForm function not found!');
                }
            } else {
                console.log('Clicked element is not a use-signal-btn');
            }
        };
        
        resultsContainer.addEventListener('click', clickHandler);
        console.log('Event listener added to results container');
        
        // Add "Apply All" button
        const applyAllButton = document.createElement('button');
        applyAllButton.className = 'apply-all-btn';
        applyAllButton.textContent = 'Apply All as Protocol Signals';
        applyAllButton.style.marginTop = '15px';
        applyAllButton.style.padding = '10px 20px';
        applyAllButton.style.background = '#28a745';
        applyAllButton.style.color = 'white';
        applyAllButton.style.border = 'none';
        applyAllButton.style.borderRadius = '4px';
        applyAllButton.style.cursor = 'pointer';
        applyAllButton.style.fontWeight = 'bold';
        
        applyAllButton.onclick = () => {
            this.applyAllAsProtocolSignals(suggestedSignals);
        };
        
        resultsContainer.appendChild(applyAllButton);
    }

    // Apply all discovered signals as protocol signals
    async applyAllAsProtocolSignals(signals) {
        console.log('Applying all discovered signals as protocol signals:', signals);
        
        let successCount = 0;
        let errorCount = 0;
        let duplicateCount = 0;
        
        // First, check which signals already exist
        const existingSignals = await this.getExistingSignals();
        const existingSignalNames = new Set(existingSignals.map(s => s.signal_name));
        
        for (const signal of signals) {
            // Skip if signal with same name already exists
            if (existingSignalNames.has(signal.signal_name)) {
                console.log(`⚠ Skipping duplicate signal: ${signal.signal_name}`);
                duplicateCount++;
                continue;
            }
            
            try {
                const response = await fetch('/api/v1/dashboard/protocol-signals', {
                    method: 'POST',
                    headers: { 'Content-Type': 'application/json' },
                    body: JSON.stringify(signal)
                });
                
                const data = await response.json();
                
                if (data.success) {
                    successCount++;
                    console.log(`✓ Created signal: ${signal.signal_name}`);
                    // Add to existing set to prevent duplicates in same batch
                    existingSignalNames.add(signal.signal_name);
                } else {
                    errorCount++;
                    console.error(`✗ Failed to create signal: ${signal.signal_name}`, data.detail);
                    
                    // Check if it's a duplicate error
                    if (data.detail && data.detail.includes('already exists')) {
                        duplicateCount++;
                    }
                }
            } catch (error) {
                errorCount++;
                console.error(`✗ Error creating signal: ${signal.signal_name}`, error);
            }
        }
        
        // Show results
        let message = `Created ${successCount} signals successfully.`;
        if (errorCount > 0) {
            message += ` ${errorCount} failed.`;
        }
        if (duplicateCount > 0) {
            message += ` ${duplicateCount} duplicates skipped.`;
        }
        
        const notificationType = errorCount > 0 ? 'warning' : (successCount > 0 ? 'success' : 'info');
        this.showNotification(message, notificationType);
        
        // Refresh the protocol signals display
        if (typeof window.loadAllSignals === 'function') {
            window.loadAllSignals();
        }
    }
    
    // Get existing signals to check for duplicates
    async getExistingSignals() {
        try {
            const response = await fetch('/api/v1/dashboard/protocol-signals');
            const data = await response.json();
            
            if (data.success) {
                return data.signals || [];
            } else {
                console.error('Failed to get existing signals:', data.detail);
                return [];
            }
        } catch (error) {
            console.error('Error getting existing signals:', error);
            return [];
        }
    }

    // Tag-based signal search
    async searchSignalsByTags(tags) {
        try {
            const params = new URLSearchParams();
            tags.forEach(tag => params.append('tags', tag));
            
            const response = await fetch(`/api/v1/dashboard/protocol-signals?${params}`);
            const data = await response.json();
            
            if (data.success) {
                return data.signals;
            } else {
                console.error('Failed to search signals by tags:', data.detail);
                return [];
            }
        } catch (error) {
            console.error('Error searching signals by tags:', error);
            return [];
        }
    }

    // Clear all existing signals (for testing)
    async clearAllSignals() {
        if (!confirm('Are you sure you want to delete ALL protocol signals? This action cannot be undone.')) {
            return;
        }
        
        try {
            const existingSignals = await this.getExistingSignals();
            let deletedCount = 0;
            
            for (const signal of existingSignals) {
                try {
                    const response = await fetch(`/api/v1/dashboard/protocol-signals/${signal.signal_id}`, {
                        method: 'DELETE'
                    });
                    
                    const data = await response.json();
                    
                    if (data.success) {
                        deletedCount++;
                        console.log(`✓ Deleted signal: ${signal.signal_name}`);
                    } else {
                        console.error(`✗ Failed to delete signal: ${signal.signal_name}`, data.detail);
                    }
                } catch (error) {
                    console.error(`✗ Error deleting signal: ${signal.signal_name}`, error);
                }
            }
            
            this.showNotification(`Deleted ${deletedCount} signals successfully.`, 'success');
            
            // Refresh the protocol signals display
            if (typeof window.loadAllSignals === 'function') {
                window.loadAllSignals();
            }
        } catch (error) {
            console.error('Error clearing signals:', error);
            this.showNotification('Error clearing signals', 'error');
        }
    }

    // Signal name suggestions based on device type
    generateSignalNameSuggestions(deviceName, dataPoint) {
        const baseName = `${deviceName} ${dataPoint}`;
        
        const suggestions = [
            baseName,
            `${dataPoint} of ${deviceName}`,
            `${deviceName} ${dataPoint} Reading`,
            `${dataPoint} Measurement - ${deviceName}`
        ];
        
        // Add context-specific suggestions
        if (dataPoint.toLowerCase().includes('speed')) {
            suggestions.push(`${deviceName} Motor Speed`);
            suggestions.push(`${deviceName} RPM`);
        }
        
        if (dataPoint.toLowerCase().includes('temperature')) {
            suggestions.push(`${deviceName} Temperature`);
            suggestions.push(`Temperature at ${deviceName}`);
        }
        
        if (dataPoint.toLowerCase().includes('pressure')) {
            suggestions.push(`${deviceName} Pressure`);
            suggestions.push(`Pressure Reading - ${deviceName}`);
        }
        
        return suggestions;
    }

    // Tag suggestions based on device and protocol
    generateTagSuggestions(deviceName, protocolType, dataPoint) {
        const suggestions = new Set();
        
        // Device type tags
        if (deviceName.toLowerCase().includes('pump')) {
            suggestions.add('equipment:pump');
            suggestions.add('fluid:water');
        }
        if (deviceName.toLowerCase().includes('sensor')) {
            suggestions.add('equipment:sensor');
            suggestions.add('type:measurement');
        }
        if (deviceName.toLowerCase().includes('controller')) {
            suggestions.add('equipment:controller');
            suggestions.add('type:control');
        }
        
        // Protocol tags
        suggestions.add(`protocol:${protocolType}`);
        if (protocolType === 'modbus_tcp' || protocolType === 'modbus_rtu') {
            suggestions.add('interface:modbus');
        } else if (protocolType === 'opcua') {
            suggestions.add('interface:opcua');
        }
        
        // Data point tags
        suggestions.add(`data_point:${dataPoint.toLowerCase().replace(/[^a-z0-9]/g, '_')}`);
        
        if (dataPoint.toLowerCase().includes('speed')) {
            suggestions.add('unit:rpm');
            suggestions.add('type:setpoint');
        }
        if (dataPoint.toLowerCase().includes('temperature')) {
            suggestions.add('unit:celsius');
            suggestions.add('type:measurement');
        }
        if (dataPoint.toLowerCase().includes('pressure')) {
            suggestions.add('unit:psi');
            suggestions.add('type:measurement');
        }
        if (dataPoint.toLowerCase().includes('status')) {
            suggestions.add('type:status');
            suggestions.add('format:boolean');
        }
        
        // Discovery tag
        suggestions.add('discovered:true');
        
        return Array.from(suggestions);
    }

    showNotification(message, type = 'info') {
        const notification = document.createElement('div');
        notification.className = `discovery-notification ${type}`;
        notification.textContent = message;
        
        document.body.appendChild(notification);
        
        // Auto-remove after 5 seconds
        setTimeout(() => {
            if (notification.parentNode) {
                notification.remove();
            }
        }, 5000);
    }
}

// Global instance
// Expose to window for global access
window.SimplifiedProtocolDiscovery = SimplifiedProtocolDiscovery;

const simplifiedDiscovery = new SimplifiedProtocolDiscovery();
window.simplifiedDiscovery = simplifiedDiscovery;

// Initialize when DOM is loaded
console.log('Discovery.js loaded - setting up DOMContentLoaded listener');

// Check if DOM is already loaded
if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', function() {
        console.log('DOMContentLoaded event fired - Initializing SimplifiedProtocolDiscovery...');
        window.simplifiedDiscovery.init();
        console.log('SimplifiedProtocolDiscovery initialized successfully');
    });
} else {
    console.log('DOM already loaded - Initializing SimplifiedProtocolDiscovery immediately...');
    window.simplifiedDiscovery.init();
    console.log('SimplifiedProtocolDiscovery initialized successfully');
}

console.log('=== DISCOVERY.JS FILE LOADED - END ===');