// Performance Monitoring System
class GridPerformanceMonitor {
    constructor() {
        this.metrics = new PerformanceMetricsCollector();
        this.thresholds = new PerformanceThresholds({
            layoutDuration: 16.67, // 60fps target
            paintDuration: 8.33,   // Half frame budget
            memoryUsage: 50000000  // 50MB threshold
        });
    }

    monitorLayoutOperation(operation) {
        const startTime = performance.now();
        const startMemory = performance.memory.usedJSHeapSize;

        // Wrap operation in performance measurement
        try {
            operation();
        } finally {
            const endTime = performance.now();
            const endMemory = performance.memory.usedJSHeapSize;

            this.metrics.recordMetric({
                type: 'layout',
                duration: endTime - startTime,
                memoryDelta: endMemory - startMemory,
                timestamp: Date.now()
            });
        }
    }

    analyzePerformance() {
        const analysis = this.metrics.analyze();
        
        return {
            averageLayoutTime: analysis.getAverageMetric('layout'),
            memoryTrend: analysis.getMemoryTrend(),
            bottlenecks: this.identifyBottlenecks(analysis),
            optimizationSuggestions: this.generateOptimizationPlan(analysis)
        };
    }
}

// Advanced Grid Optimization Algorithm
class GridOptimizer {
    constructor(grid) {
        this.grid = grid;
        this.genetic = new GeneticOptimizer({
            populationSize: 100,
            generationLimit: 50,
            mutationRate: 0.1
        });
        this.predictor = new LoadPredictor();
    }

    async optimizeLayout() {
        // Collect historical performance data
        const performanceHistory = await this.collectPerformanceData();
        
        // Train prediction model
        this.predictor.train(performanceHistory);
        
        // Generate optimization candidates
        const candidates = this.genetic.evolve({
            fitnessFunction: this.evaluateLayoutFitness.bind(this),
            constraints: this.grid.getConstraints(),
            currentLayout: this.grid.getCurrentLayout()
        });
        
        // Apply best candidate
        return this.applyOptimizedLayout(candidates[0]);
    }

    evaluateLayoutFitness(layout) {
        return {
            performanceScore: this.calculatePerformanceScore(layout),
            stabilityScore: this.calculateStabilityScore(layout),
            adaptabilityScore: this.predictAdaptability(layout)
        };
    }
}

// Performance Monitoring System
class GridPerformanceMonitor {
    constructor() {
        this.metrics = new PerformanceMetricsCollector();
        this.thresholds = new PerformanceThresholds({
            layoutDuration: 16.67, // 60fps target
            paintDuration: 8.33,   // Half frame budget
            memoryUsage: 50000000  // 50MB threshold
        });
    }

    monitorLayoutOperation(operation) {
        const startTime = performance.now();
        const startMemory = performance.memory.usedJSHeapSize;

        // Wrap operation in performance measurement
        try {
            operation();
        } finally {
            const endTime = performance.now();
            const endMemory = performance.memory.usedJSHeapSize;

            this.metrics.recordMetric({
                type: 'layout',
                duration: endTime - startTime,
                memoryDelta: endMemory - startMemory,
                timestamp: Date.now()
            });
        }
    }

    analyzePerformance() {
        const analysis = this.metrics.analyze();
        
        return {
            averageLayoutTime: analysis.getAverageMetric('layout'),
            memoryTrend: analysis.getMemoryTrend(),
            bottlenecks: this.identifyBottlenecks(analysis),
            optimizationSuggestions: this.generateOptimizationPlan(analysis)
        };
    }
}

// Advanced Grid Optimization Algorithm
class GridOptimizer {
    constructor(grid) {
        this.grid = grid;
        this.genetic = new GeneticOptimizer({
            populationSize: 100,
            generationLimit: 50,
            mutationRate: 0.1
        });
        this.predictor = new LoadPredictor();
    }

    async optimizeLayout() {
        // Collect historical performance data
        const performanceHistory = await this.collectPerformanceData();
        
        // Train prediction model
        this.predictor.train(performanceHistory);
        
        // Generate optimization candidates
        const candidates = this.genetic.evolve({
            fitnessFunction: this.evaluateLayoutFitness.bind(this),
            constraints: this.grid.getConstraints(),
            currentLayout: this.grid.getCurrentLayout()
        });
        
        // Apply best candidate
        return this.applyOptimizedLayout(candidates[0]);
    }

    evaluateLayoutFitness(layout) {
        return {
            performanceScore: this.calculatePerformanceScore(layout),
            stabilityScore: this.calculateStabilityScore(layout),
            adaptabilityScore: this.predictAdaptability(layout)
        };
    }
}

// Render Pipeline Optimization System
class RenderPipelineOptimizer {
    constructor() {
        this.pipeline = new RenderPipeline({
            stages: ['layout', 'paint', 'composite'],
            optimizationLevel: 'aggressive'
        });
        this.frameScheduler = new FrameScheduler();
    }

    optimizeRenderCycle() {
        return this.pipeline.optimize({
            // Layout optimization
            layoutOptimization: {
                strategy: 'incremental',
                batchSize: this.calculateOptimalBatchSize(),
                priority: RenderPriority.HIGH
            },
            
            // Paint optimization
            paintOptimization: {
                strategy: 'layer',
                compositor: 'hardware',
                cachePolicy: 'adaptive'
            },
            
            // Composite optimization
            compositeOptimization: {
                strategy: 'gpu',
                layers: this.identifyCompositeLayers(),
                transforms: this.optimizeTransforms()
            }
        });
    }

    calculateOptimalBatchSize() {
        const metrics = this.pipeline.getPerformanceMetrics();
        const deviceCapabilities = this.pipeline.getDeviceCapabilities();
        
        return Math.min(
            metrics.averageFrameTime * deviceCapabilities.processingPower,
            MAX_BATCH_SIZE
        );
    }

    identifyCompositeLayers() {
        return this.pipeline.analyzeLayers().map(layer => ({
            id: layer.id,
            complexity: this.calculateLayerComplexity(layer),
            canBeComposited: this.checkCompositionEligibility(layer)
        }));
    }
}

class GridCacheManager {
    constructor() {
        this.layoutCache = new LRUCache({
            maxSize: 1000,
            maxAge: 5000 // 5 seconds
        });
        
        this.styleCache = new StyleComputationCache();
        this.paintCache = new PaintResultCache();
    }

    cacheLayout(gridId, layout) {
        const cacheKey = this.generateCacheKey(gridId, layout);
        const layoutHash = this.computeLayoutHash(layout);
        
        this.layoutCache.set(cacheKey, {
            layout: layout,
            hash: layoutHash,
            timestamp: Date.now()
        });
    }

    invalidateCache(reason) {
        switch(reason) {
            case 'resize':
                this.layoutCache.clear();
                break;
            case 'style':
                this.styleCache.clear();
                break;
            case 'content':
                this.paintCache.clear();
                break;
        }
    }
}

class GridThreadManager {
    constructor() {
        this.workers = new Set();
        this.taskQueue = new PriorityQueue();
        this.threadPool = new ThreadPool({
            minThreads: 2,
            maxThreads: navigator.hardwareConcurrency
        });
    }

    scheduleTask(task) {
        const worker = this.selectOptimalWorker(task);
        
        return worker.execute(task).then(result => {
            this.handleTaskCompletion(task, result);
            this.rebalanceWorkload();
        });
    }

    selectOptimalWorker(task) {
        return Array.from(this.workers)
            .reduce((best, current) => {
                const score = this.calculateWorkerScore(current, task);
                return score > best.score ? {worker: current, score} : best;
            }, {worker: null, score: -Infinity}).worker;
    }

    rebalanceWorkload() {
        const workload = this.analyzeWorkload();
        const efficiency = this.calculateThreadingEfficiency();
        
        if (efficiency < EFFICIENCY_THRESHOLD) {
            this.redistributeTasks();
        }
    }
}

class BottleneckAnalyzer {
    constructor() {
        this.metrics = new PerformanceMetrics();
        this.analyzer = new PerformanceAnalyzer();
        this.predictor = new MLPredictor({
            model: 'performance',
            features: ['layoutTime', 'paintTime', 'compositeTime']
        });
    }

    async analyzePerformanceBottlenecks() {
        const metrics = await this.collectPerformanceData();
        const analysis = this.analyzer.analyze(metrics);
        
        return {
            bottlenecks: this.identifyBottlenecks(analysis),
            recommendations: this.generateOptimizationRecommendations(analysis),
            predictions: this.predictor.predictFutureBottlenecks(analysis)
        };
    }

    identifyBottlenecks(analysis) {
        return analysis.phases
            .filter(phase => phase.duration > PERFORMANCE_THRESHOLD)
            .map(phase => ({
                phase: phase.name,
                severity: this.calculateBottleneckSeverity(phase),
                impact: this.assessPerformanceImpact(phase),
                solutions: this.suggestOptimizations(phase)
            }));
    }
}

// Grid Microservices Architecture Implementation
class GridMicroservicesManager {
    constructor() {
        this.services = new Map();
        this.messageQueue = new MessageQueue();
        this.serviceRegistry = new ServiceRegistry();
    }

    registerService(serviceName, serviceInstance) {
        if (!this.validateService(serviceInstance)) {
            throw new ServiceValidationError(
                `Service ${serviceName} failed validation checks`
            );
        }

        this.services.set(serviceName, {
            instance: serviceInstance,
            status: 'active',
            metrics: new ServiceMetrics(),
            dependencies: this.analyzeDependencies(serviceInstance)
        });

        this.setupServiceCommunication(serviceName);
    }

    setupServiceCommunication(serviceName) {
        const service = this.services.get(serviceName);
        
        service.instance.on('message', (message) => {
            this.messageQueue.push({
                source: serviceName,
                content: message,
                priority: this.calculateMessagePriority(message)
            });
        });

        service.instance.on('error', (error) => {
            this.handleServiceError(serviceName, error);
        });
    }

    async processMessage(message) {
        const handler = this.getMessageHandler(message.type);
        const context = this.createProcessingContext(message);
        
        try {
            const result = await handler.process(message, context);
            this.updateServiceMetrics(message.source, 'success');
            return result;
        } catch (error) {
            this.handleProcessingError(message, error);
            this.updateServiceMetrics(message.source, 'error');
            throw error;
        }
    }
}

class GridSchedulingSystem {
    constructor() {
        this.taskQueue = new PriorityQueue();
        this.resourceManager = new ResourceManager();
        this.scheduler = new TaskScheduler({
            maxConcurrentTasks: 4,
            taskTimeout: 5000
        });
    }

    async scheduleLayoutTask(task) {
        const taskContext = this.createTaskContext(task);
        const priority = this.calculateTaskPriority(task);

        const scheduledTask = {
            id: generateUniqueId(),
            type: task.type,
            priority: priority,
            dependencies: this.analyzeDependencies(task),
            resources: this.calculateRequiredResources(task),
            execution: async () => {
                await this.executeTask(task, taskContext);
            }
        };

        this.taskQueue.enqueue(scheduledTask);
        await this.processTaskQueue();
    }

    async processTaskQueue() {
        while (!this.taskQueue.isEmpty()) {
            const task = this.taskQueue.dequeue();
            
            if (this.canProcessTask(task)) {
                try {
                    await this.executeTaskWithTimeout(task);
                } catch (error) {
                    this.handleTaskError(task, error);
                } finally {
                    this.releaseResources(task);
                }
            } else {
                this.taskQueue.requeue(task);
            }
        }
    }

    canProcessTask(task) {
        return (
            this.areDependenciesMet(task) &&
            this.resourceManager.hasAvailableResources(task.resources)
        );
    }
}

class GridStateManager {
    constructor() {
        this.currentState = new GridState();
        this.stateHistory = new StateHistory();
        this.transactionManager = new TransactionManager();
    }

    async updateState(update) {
        const transaction = this.transactionManager.begin();

        try {
            // Validate state update
            this.validateStateUpdate(update);

            // Create state snapshot
            const snapshot = this.currentState.createSnapshot();

            // Apply update
            const newState = await this.applyStateUpdate(update);

            // Verify state consistency
            this.verifyStateConsistency(newState);

            // Commit transaction
            this.currentState = newState;
            this.stateHistory.push(snapshot);
            await transaction.commit();

        } catch (error) {
            await transaction.rollback();
            this.handleStateUpdateError(error);
        }
    }

    validateStateUpdate(update) {
        const validator = new StateUpdateValidator();
        
        return validator.validate(update, {
            rules: this.getValidationRules(),
            context: this.getValidationContext()
        });
    }

    async applyStateUpdate(update) {
        const processor = new StateUpdateProcessor();
        
        return await processor.process(
            this.currentState,
            update,
            {
                mode: 'atomic',
                validation: 'strict'
            }
        );
    }
}

class GridSecurityManager {
    constructor() {
        this.accessControl = new AccessControlManager();
        this.validator = new InputValidator();
        this.auditor = new SecurityAuditor();
    }

    validateOperation(operation) {
        // Validate input parameters
        const validationResult = this.validator.validate(operation, {
            rules: this.getSecurityRules(),
            context: this.getSecurityContext()
        });

        if (!validationResult.isValid) {
            throw new SecurityValidationError(
                validationResult.errors
            );
        }

        // Check permissions
        if (!this.accessControl.hasPermission(
            operation.user,
            operation.resource,
            operation.action
        )) {
            throw new AccessDeniedError(
                `Access denied for ${operation.action} on ${operation.resource}`
            );
        }

        // Audit the operation
        this.auditor.logOperation(operation);

        return true;
    }

    enforceResourceLimits(resource) {
        const limits = this.getResourceLimits(resource);
        const usage = this.measureResourceUsage(resource);

        if (usage.exceeds(limits)) {
            throw new ResourceLimitExceededError(
                `Resource limit exceeded for ${resource.type}`
            );
        }
    }
}