package enterprise

import (
    "context"
    "fmt"
    "sync"
    "time"
    
    "github.com/hashicorp/terraform-exec/tfexec"
    "k8s.io/client-go/kubernetes"
    "github.com/pulumi/pulumi/sdk/v3/go/auto"
)

// EnterpriseIaCPlatform represents a comprehensive IaC management system
type EnterpriseIaCPlatform struct {
    // Core Components
    stateManager          *DistributedStateManager
    operationOrchestrator *AdvancedOrchestrator
    securityFramework     *EnterpriseSecurityFramework
    complianceEngine      *ComplianceValidationEngine
    
    // Tool Integrations
    terraformManager      *TerraformEnterpriseManager
    pulumiManager        *PulumiEnterpriseManager
    kubernetesManager    *KubernetesOperatorManager
    
    // Enterprise Features
    auditLogger          *ComprehensiveAuditLogger
    costOptimizer        *IntelligentCostOptimizer
    riskAssessment       *RiskAssessmentEngine
    
    // Multi-Cloud Support
    cloudProviders       map[string]CloudProviderInterface
    resourceInventory    *GlobalResourceInventory
    
    // Performance Optimization
    cacheManager         *DistributedCacheManager
    parallelExecutor     *ConcurrentExecutionEngine
    
    mu sync.RWMutex
}

// DistributedStateManager handles enterprise-grade state management
type DistributedStateManager struct {
    // State Storage
    primaryBackend       StateBackendInterface
    secondaryBackends    []StateBackendInterface
    distributionStrategy StateDistributionStrategy
    
    // Conflict Resolution
    conflictResolver     *AdvancedConflictResolver
    mergingEngine        *StateMergingEngine
    versionControl       *StateVersionController
    
    // Performance Features
    shardingManager      *StateShardingManager
    compressionEngine    *StateCompressionEngine
    encryptionService    *StateEncryptionService
    
    // Monitoring
    stateHealthMonitor   *StateHealthMonitor
    performanceTracker   *StatePerformanceTracker
}

// AdvancedOrchestrator manages complex operation workflows
type AdvancedOrchestrator struct {
    // Workflow Management
    workflowEngine       *WorkflowExecutionEngine
    dependencyResolver   *AdvancedDependencyResolver
    rollbackManager      *IntelligentRollbackManager
    
    // Operation Strategies
    operationPlanner     *OperationPlanningEngine
    executionOptimizer   *ExecutionOptimizationEngine
    resourceScheduler    *ResourceSchedulingEngine
    
    // Safety Features
    driftDetector        *ContinuousDriftDetector
    changeValidator      *ChangeValidationEngine
    impactAnalyzer       *ChangeImpactAnalyzer
    
    // Integration Points
    imperativeGateway    *ImperativeToolGateway
    apiManager           *MultiAPIManager
    eventProcessor       *EventProcessingEngine
}

// Initialize enterprise IaC platform
func NewEnterpriseIaCPlatform(config *EnterpriseConfig) (*EnterpriseIaCPlatform, error) {
    platform := &EnterpriseIaCPlatform{
        cloudProviders:    make(map[string]CloudProviderInterface),
        resourceInventory: NewGlobalResourceInventory(),
    }
    
    // Initialize state management
    stateConfig := &StateManagerConfig{
        DistributionStrategy: config.StateDistribution,
        EncryptionEnabled:    true,
        CompressionEnabled:   true,
        ShardingEnabled:      config.EnableSharding,
    }
    
    var err error
    platform.stateManager, err = NewDistributedStateManager(stateConfig)
    if err != nil {
        return nil, fmt.Errorf("failed to initialize state manager: %w", err)
    }
    
    // Initialize orchestration
    orchestratorConfig := &OrchestratorConfig{
        MaxConcurrentOperations: config.MaxConcurrency,
        RollbackStrategy:        config.RollbackStrategy,
        DriftDetectionInterval:  config.DriftDetectionInterval,
    }
    
    platform.operationOrchestrator, err = NewAdvancedOrchestrator(orchestratorConfig)
    if err != nil {
        return nil, fmt.Errorf("failed to initialize orchestrator: %w", err)
    }
    
    // Initialize security framework
    securityConfig := &SecurityConfig{
        EncryptionAtRest:     true,
        EncryptionInTransit:  true,
        AccessControlModel:   "RBAC",
        AuditingEnabled:      true,
        ComplianceFrameworks: config.ComplianceFrameworks,
    }
    
    platform.securityFramework, err = NewEnterpriseSecurityFramework(securityConfig)
    if err != nil {
        return nil, fmt.Errorf("failed to initialize security framework: %w", err)
    }
    
    // Initialize tool managers
    if err := platform.initializeToolManagers(config); err != nil {
        return nil, fmt.Errorf("failed to initialize tool managers: %w", err)
    }
    
    // Initialize cloud providers
    if err := platform.initializeCloudProviders(config); err != nil {
        return nil, fmt.Errorf("failed to initialize cloud providers: %w", err)
    }
    
    return platform, nil
}

// ExecuteEnterpriseOperation performs comprehensive IaC operations
func (p *EnterpriseIaCPlatform) ExecuteEnterpriseOperation(
    ctx context.Context,
    operation *EnterpriseOperation,
) (*OperationResult, error) {
    p.mu.Lock()
    defer p.mu.Unlock()
    
    // Pre-execution validation
    if err := p.validateOperation(operation); err != nil {
        return nil, fmt.Errorf("operation validation failed: %w", err)
    }
    
    // Security and compliance checks
    if err := p.securityFramework.ValidateOperation(operation); err != nil {
        return nil, fmt.Errorf("security validation failed: %w", err)
    }
    
    // Create execution plan
    plan, err := p.operationOrchestrator.CreateExecutionPlan(operation)
    if err != nil {
        return nil, fmt.Errorf("failed to create execution plan: %w", err)
    }
    
    // Execute with monitoring
    result, err := p.executeWithMonitoring(ctx, plan)
    if err != nil {
        // Attempt intelligent rollback
        if rollbackErr := p.performIntelligentRollback(ctx, plan); rollbackErr != nil {
            return nil, fmt.Errorf("execution failed and rollback failed: %w, %w", err, rollbackErr)
        }
        return nil, fmt.Errorf("execution failed but rollback succeeded: %w", err)
    }
    
    // Post-execution tasks
    if err := p.performPostExecutionTasks(ctx, result); err != nil {
        return result, fmt.Errorf("post-execution tasks failed: %w", err)
    }
    
    return result, nil
}

// AdvancedOperationSelection implements sophisticated operation selection logic
func (p *EnterpriseIaCPlatform) AdvancedOperationSelection(
    desiredState *ResourceState,
    currentState *ResourceState,
) (*OperationPlan, error) {
    
    // Initialize operation planner
    planner := &EnterpriseOperationPlanner{
        riskAssessment:    p.riskAssessment,
        costOptimizer:     p.costOptimizer,
        dependencyEngine:  p.operationOrchestrator.dependencyResolver,
        complianceEngine:  p.complianceEngine,
    }
    
    // Analyze state differences
    diff, err := planner.AnalyzeStateDifferences(desiredState, currentState)
    if err != nil {
        return nil, fmt.Errorf("failed to analyze state differences: %w", err)
    }
    
    // Generate operation strategies
    strategies, err := planner.GenerateOperationStrategies(diff)
    if err != nil {
        return nil, fmt.Errorf("failed to generate operation strategies: %w", err)
    }
    
    // Optimize execution plan
    optimizedPlan, err := planner.OptimizeExecutionPlan(strategies)
    if err != nil {
        return nil, fmt.Errorf("failed to optimize execution plan: %w", err)
    }
    
    return optimizedPlan, nil
}

// StateBackendInterface defines enterprise state storage capabilities
type StateBackendInterface interface {
    Store(ctx context.Context, state *EnterpriseState) error
    Retrieve(ctx context.Context, identifier string) (*EnterpriseState, error)
    Lock(ctx context.Context, identifier string, duration time.Duration) (*StateLock, error)
    Unlock(ctx context.Context, lock *StateLock) error
    ListVersions(ctx context.Context, identifier string) ([]*StateVersion, error)
    CreateSnapshot(ctx context.Context, identifier string) (*StateSnapshot, error)
    RestoreSnapshot(ctx context.Context, snapshot *StateSnapshot) error
}

// EnterpriseState represents comprehensive infrastructure state
type EnterpriseState struct {
    // Metadata
    ID              string                 `json:"id"`
    Version         int64                  `json:"version"`
    Timestamp       time.Time              `json:"timestamp"`
    Environment     string                 `json:"environment"`
    Namespace       string                 `json:"namespace"`
    
    // Resource Information
    Resources       map[string]*Resource   `json:"resources"`
    Dependencies    *DependencyGraph       `json:"dependencies"`
    Outputs         map[string]interface{} `json:"outputs"`
    
    // Enterprise Features
    Compliance      *ComplianceStatus      `json:"compliance"`
    Security        *SecurityStatus        `json:"security"`
    CostTracking    *CostInformation       `json:"cost_tracking"`
    RiskAssessment  *RiskAssessment        `json:"risk_assessment"`
    
    // Performance Metadata
    LastModified    time.Time              `json:"last_modified"`
    AccessPatterns  *AccessPatternData     `json:"access_patterns"`
    OptimizationHints *OptimizationHints   `json:"optimization_hints"`
    
    // Audit Trail
    Changes         []*StateChange         `json:"changes"`
    Approvals       []*ApprovalRecord      `json:"approvals"`
    Rollbacks       []*RollbackRecord      `json:"rollbacks"`
}

// AdvancedConflictResolver handles state conflicts intelligently
type AdvancedConflictResolver struct {
    resolutionStrategies map[ConflictType]ResolutionStrategy
    machineLearnai      *MLConflictPredictor
    humanEscalation     *HumanEscalationService
    auditLogger         *ConflictAuditLogger
}

// ResolveConflict intelligently resolves state conflicts
func (r *AdvancedConflictResolver) ResolveConflict(
    ctx context.Context,
    conflict *StateConflict,
) (*ConflictResolution, error) {
    
    // Analyze conflict type and severity
    analysis, err := r.analyzeConflict(conflict)
    if err != nil {
        return nil, fmt.Errorf("failed to analyze conflict: %w", err)
    }
    
    // Check for automated resolution strategies
    if strategy, exists := r.resolutionStrategies[analysis.ConflictType]; exists {
        if analysis.Severity <= strategy.MaxSeverity {
            resolution, err := strategy.Resolve(ctx, conflict)
            if err == nil {
                r.auditLogger.LogResolution(conflict, resolution, "automated")
                return resolution, nil
            }
        }
    }
    
    // Use ML-based prediction for complex conflicts
    if r.machineLearnai != nil {
        prediction, confidence := r.machineLearnai.PredictResolution(conflict)
        if confidence > 0.8 {
            resolution, err := r.applyMLResolution(ctx, conflict, prediction)
            if err == nil {
                r.auditLogger.LogResolution(conflict, resolution, "ml-assisted")
                return resolution, nil
            }
        }
    }
    
    // Escalate to human intervention
    if r.humanEscalation != nil {
        escalation, err := r.humanEscalation.CreateEscalation(conflict)
        if err != nil {
            return nil, fmt.Errorf("failed to create human escalation: %w", err)
        }
        
        r.auditLogger.LogEscalation(conflict, escalation)
        return &ConflictResolution{
            Type:        "human_escalation",
            Escalation:  escalation,
            RequiresManualIntervention: true,
        }, nil
    }
    
    return nil, fmt.Errorf("unable to resolve conflict: %s", conflict.Description)
}

// EnterpriseOperationPlanner implements advanced operation planning
type EnterpriseOperationPlanner struct {
    // Analysis Engines
    dependencyAnalyzer   *DependencyAnalysisEngine
    riskCalculator       *RiskCalculationEngine
    costOptimizer        *CostOptimizationEngine
    complianceValidator  *ComplianceValidationEngine
    
    // Planning Strategies
    parallelizationEngine *ParallelizationEngine
    sequencingOptimizer   *SequencingOptimizer
    rollbackPlanner       *RollbackPlanningEngine
    
    // Performance Optimizations
    cacheManager          *OperationCacheManager
    predictiveAnalyzer    *PredictiveAnalysisEngine
    
    // Enterprise Features
    changeApprovalEngine  *ChangeApprovalEngine
    auditTrailGenerator   *AuditTrailGenerator
}

// GenerateEnterpriseOperationPlan creates comprehensive operation plans
func (p *EnterpriseOperationPlanner) GenerateEnterpriseOperationPlan(
    ctx context.Context,
    request *OperationPlanRequest,
) (*EnterpriseOperationPlan, error) {
    
    // Phase 1: Resource Analysis and Dependency Mapping
    resourceGraph, err := p.dependencyAnalyzer.BuildResourceGraph(request.Resources)
    if err != nil {
        return nil, fmt.Errorf("failed to build resource graph: %w", err)
    }
    
    // Phase 2: Operation Classification and Prioritization
    operations, err := p.classifyAndPrioritizeOperations(resourceGraph, request)
    if err != nil {
        return nil, fmt.Errorf("failed to classify operations: %w", err)
    }
    
    // Phase 3: Risk Assessment and Mitigation Planning
    riskAssessment, err := p.riskCalculator.AssessOperationRisks(operations)
    if err != nil {
        return nil, fmt.Errorf("failed to assess risks: %w", err)
    }
    
    // Phase 4: Cost Optimization
    costOptimizedPlan, err := p.costOptimizer.OptimizeOperationCosts(operations)
    if err != nil {
        return nil, fmt.Errorf("failed to optimize costs: %w", err)
    }
    
    // Phase 5: Compliance Validation
    complianceStatus, err := p.complianceValidator.ValidateCompliance(costOptimizedPlan)
    if err != nil {
        return nil, fmt.Errorf("compliance validation failed: %w", err)
    }
    
    // Phase 6: Execution Sequence Optimization
    optimizedSequence, err := p.sequencingOptimizer.OptimizeSequence(costOptimizedPlan)
    if err != nil {
        return nil, fmt.Errorf("failed to optimize sequence: %w", err)
    }
    
    // Phase 7: Rollback Plan Generation
    rollbackPlan, err := p.rollbackPlanner.GenerateRollbackPlan(optimizedSequence)
    if err != nil {
        return nil, fmt.Errorf("failed to generate rollback plan: %w", err)
    }
    
    // Phase 8: Change Approval Workflow
    approvalWorkflow, err := p.changeApprovalEngine.CreateApprovalWorkflow(optimizedSequence)
    if err != nil {
        return nil, fmt.Errorf("failed to create approval workflow: %w", err)
    }
    
    return &EnterpriseOperationPlan{
        ID:                   generatePlanID(),
        Timestamp:           time.Now(),
        Operations:          optimizedSequence,
        RiskAssessment:      riskAssessment,
        ComplianceStatus:    complianceStatus,
        RollbackPlan:        rollbackPlan,
        ApprovalWorkflow:    approvalWorkflow,
        EstimatedDuration:   p.estimateExecutionDuration(optimizedSequence),
        EstimatedCost:       p.estimateExecutionCost(optimizedSequence),
        DependencyGraph:     resourceGraph,
        ExecutionMetadata:   p.generateExecutionMetadata(request),
    }, nil
}

// AdvancedOperationClassifier categorizes operations for optimal execution
type AdvancedOperationClassifier struct {
    // Classification Rules
    operationRules       map[OperationType]*ClassificationRule
    resourceTypeRules    map[ResourceType]*ResourceClassificationRule
    
    // Machine Learning Components
    mlClassifier         *MLOperationClassifier
    patternRecognizer    *OperationPatternRecognizer
    
    // Enterprise Policies
    policyEngine         *OperationPolicyEngine
    governanceFramework  *GovernanceFramework
}

// ClassifyOperation determines the optimal execution strategy for an operation
func (c *AdvancedOperationClassifier) ClassifyOperation(
    operation *Operation,
    context *OperationContext,
) (*OperationClassification, error) {
    
    // Basic classification
    baseClassification := c.performBaseClassification(operation)
    
    // Enhanced classification with context
    contextualClassification := c.enhanceWithContext(baseClassification, context)
    
    // Policy-based adjustments
    policyAdjustedClassification := c.applyPolicyAdjustments(contextualClassification)
    
    // ML-based optimization
    if c.mlClassifier != nil {
        mlOptimized := c.mlClassifier.OptimizeClassification(policyAdjustedClassification)
        if mlOptimized.Confidence > 0.7 {
            policyAdjustedClassification = mlOptimized
        }
    }
    
    return policyAdjustedClassification, nil
}

// DependencyAnalysisEngine performs sophisticated dependency analysis
type DependencyAnalysisEngine struct {
    // Graph Analysis
    graphAnalyzer        *ResourceGraphAnalyzer
    cyclDetector         *CyclicalDependencyDetector
    criticalPathAnalyzer *CriticalPathAnalyzer
    
    // Dynamic Dependencies
    runtimeDependencyResolver *RuntimeDependencyResolver
    conditionalDependencyEngine *ConditionalDependencyEngine
    
    // Performance Optimization
    dependencyCache      *DependencyCache
    parallelAnalyzer     *ParallelDependencyAnalyzer
}

// AnalyzeDependencies performs comprehensive dependency analysis
func (d *DependencyAnalysisEngine) AnalyzeDependencies(
    resources []*Resource,
    operations []*Operation,
) (*DependencyAnalysis, error) {
    
    // Build comprehensive dependency graph
    graph, err := d.graphAnalyzer.BuildComprehensiveGraph(resources, operations)
    if err != nil {
        return nil, fmt.Errorf("failed to build dependency graph: %w", err)
    }
    
    // Detect and resolve cycles
    cycles, err := d.cyclDetector.DetectCycles(graph)
    if err != nil {
        return nil, fmt.Errorf("failed to detect cycles: %w", err)
    }
    
    if len(cycles) > 0 {
        resolvedGraph, err := d.resolveCycles(graph, cycles)
        if err != nil {
            return nil, fmt.Errorf("failed to resolve dependency cycles: %w", err)
        }
        graph = resolvedGraph
    }
    
    // Analyze critical paths
    criticalPaths, err := d.criticalPathAnalyzer.AnalyzeCriticalPaths(graph)
    if err != nil {
        return nil, fmt.Errorf("failed to analyze critical paths: %w", err)
    }
    
    // Identify parallelization opportunities
    parallelGroups, err := d.parallelAnalyzer.IdentifyParallelGroups(graph)
    if err != nil {
        return nil, fmt.Errorf("failed to identify parallel groups: %w", err)
    }
    
    return &DependencyAnalysis{
        Graph:              graph,
        CriticalPaths:      criticalPaths,
        ParallelGroups:     parallelGroups,
        ResolvedCycles:     cycles,
        OptimizationHints:  d.generateOptimizationHints(graph, criticalPaths),
        EstimatedComplexity: d.calculateComplexity(graph),
    }, nil
}

// MultiToolIntegrationFramework orchestrates multiple IaC and imperative tools
type MultiToolIntegrationFramework struct {
    // Tool Managers
    iacTools           map[string]IaCToolInterface
    imperativeTools    map[string]ImperativeToolInterface
    
    // Integration Components
    stateSync          *CrossToolStateSynchronizer
    conflictResolver   *MultiToolConflictResolver
    workflowEngine     *UnifiedWorkflowEngine
    
    // Enterprise Features
    auditAggregator    *CrossToolAuditAggregator
    complianceEngine   *UnifiedComplianceEngine
    securityOverlay    *SecurityOrchestrationOverlay
    
    // Performance Components
    cacheCoordinator   *MultiToolCacheCoordinator
    loadBalancer       *ToolLoadBalancer
    
    // Monitoring
    metricsAggregator  *CrossToolMetricsAggregator
    alertManager       *UnifiedAlertManager
}

// IaCToolInterface defines the interface for IaC tool integration
type IaCToolInterface interface {
    Plan(ctx context.Context, config *ToolConfig) (*ExecutionPlan, error)
    Apply(ctx context.Context, plan *ExecutionPlan) (*ExecutionResult, error)
    Destroy(ctx context.Context, resources []*Resource) (*ExecutionResult, error)
    GetState(ctx context.Context) (*ToolState, error)
    Validate(ctx context.Context, config *ToolConfig) (*ValidationResult, error)
    
    // Enterprise Features
    EstimateCosts(ctx context.Context, plan *ExecutionPlan) (*CostEstimate, error)
    AnalyzeRisks(ctx context.Context, plan *ExecutionPlan) (*RiskAnalysis, error)
    GenerateAuditReport(ctx context.Context) (*AuditReport, error)
}

// ImperativeToolInterface defines the interface for imperative tool integration
type ImperativeToolInterface interface {
    ExecuteCommand(ctx context.Context, command *Command) (*CommandResult, error)
    ListResources(ctx context.Context, filter *ResourceFilter) ([]*Resource, error)
    GetResource(ctx context.Context, identifier string) (*Resource, error)
    
    // State Management
    SyncState(ctx context.Context, externalState *ExternalState) error
    DetectDrift(ctx context.Context, baseline *StateBaseline) (*DriftReport, error)
    
    // Enterprise Features
    ValidatePermissions(ctx context.Context, operation *Operation) (*PermissionResult, error)
    GenerateChangeLog(ctx context.Context, timeRange *TimeRange) (*ChangeLog, error)
}

// TerraformEnterpriseManager implements sophisticated Terraform integration
type TerraformEnterpriseManager struct {
    // Core Terraform Components
    terraformExec      *tfexec.Terraform
    workspaceManager   *TerraformWorkspaceManager
    stateManager       *TerraformStateManager
    
    // Enterprise Extensions
    policyEngine       *TerraformPolicyEngine
    costEstimator      *TerraformCostEstimator
    securityScanner    *TerraformSecurityScanner
    
    // Performance Features
    parallelRunner     *TerraformParallelRunner
    cacheManager       *TerraformCacheManager
    
    // Integration Features
    vcsIntegration     *VCSIntegration
    cicdIntegration    *CICDIntegration
    monitoringHooks    *MonitoringHooks
}

// ExecuteEnterpriseOperation performs comprehensive Terraform operations
func (t *TerraformEnterpriseManager) ExecuteEnterpriseOperation(
    ctx context.Context,
    operation *TerraformOperation,
) (*TerraformResult, error) {
    
    // Pre-execution validation
    if err := t.validateOperation(operation); err != nil {
        return nil, fmt.Errorf("operation validation failed: %w", err)
    }
    
    // Security scanning
    securityReport, err := t.securityScanner.ScanConfiguration(operation.Config)
    if err != nil {
        return nil, fmt.Errorf("security scan failed: %w", err)
    }
    
    if securityReport.HasCriticalIssues() {
        return nil, fmt.Errorf("critical security issues detected: %v", securityReport.CriticalIssues)
    }
    
    // Policy validation
    policyResult, err := t.policyEngine.ValidatePolicies(operation)
    if err != nil {
        return nil, fmt.Errorf("policy validation failed: %w", err)
    }
    
    if !policyResult.Passed {
        return nil, fmt.Errorf("policy validation failed: %v", policyResult.Violations)
    }
    
    // Cost estimation
    costEstimate, err := t.costEstimator.EstimateCosts(operation)
    if err != nil {
        return nil, fmt.Errorf("cost estimation failed: %w", err)
    }
    
    // Generate execution plan
    plan, err := t.terraformExec.Plan(ctx, tfexec.Out("plan.tfplan"))
    if err != nil {
        return nil, fmt.Errorf("terraform plan failed: %w", err)
    }
    
    // Execute with monitoring
    result, err := t.executeWithEnterpriseMonitoring(ctx, plan, costEstimate)
    if err != nil {
        return nil, fmt.Errorf("terraform execution failed: %w", err)
    }
    
    return result, nil
}

// PulumiEnterpriseManager provides enterprise-grade Pulumi integration
type PulumiEnterpriseManager struct {
    // Core Pulumi Components
    workspace          auto.Workspace
    stackManager       *PulumiStackManager
    programManager     *PulumiProgramManager
    
    // Enterprise Features
    policyFramework    *PulumiPolicyFramework
    costTracker        *PulumiCostTracker
    complianceEngine   *PulumiComplianceEngine
    
    // Advanced Features
    secretsManager     *PulumiSecretsManager
    transformEngine    *PulumiTransformEngine
    
    // Integration Components
    gitopsIntegration  *PulumiGitOpsIntegration
    k8sIntegration     *PulumiKubernetesIntegration
}

// ExecutePulumiOperation performs enterprise Pulumi operations
func (p *PulumiEnterpriseManager) ExecutePulumiOperation(
    ctx context.Context,
    operation *PulumiOperation,
) (*PulumiResult, error) {
    
    // Initialize or select workspace
    workspace, err := p.getOrCreateWorkspace(operation.WorkspaceName)
    if err != nil {
        return nil, fmt.Errorf("failed to get workspace: %w", err)
    }
    
    // Set configuration
    for key, value := range operation.Config {
        if err := workspace.SetConfig(ctx, key, auto.ConfigValue{Value: value}); err != nil {
            return nil, fmt.Errorf("failed to set config %s: %w", key, err)
        }
    }
    
    // Policy validation
    if err := p.policyFramework.ValidateStack(ctx, workspace); err != nil {
        return nil, fmt.Errorf("policy validation failed: %w", err)
    }
    
    // Preview changes
    preview, err := workspace.Preview(ctx, auto.OptionProgressStreams(operation.ProgressStreams))
    if err != nil {
        return nil, fmt.Errorf("preview failed: %w", err)
    }
    
    // Cost analysis
    costAnalysis, err := p.costTracker.AnalyzeCosts(ctx, preview)
    if err != nil {
        return nil, fmt.Errorf("cost analysis failed: %w", err)
    }
    
    // Execute update
    updateResult, err := workspace.Up(ctx, auto.OptionProgressStreams(operation.ProgressStreams))
    if err != nil {
        return nil, fmt.Errorf("update failed: %w", err)
    }
    
    return &PulumiResult{
        Summary:      updateResult.Summary,
        Outputs:      updateResult.Outputs,
        CostAnalysis: costAnalysis,
        PolicyResults: p.policyFramework.GetLastResults(),
    }, nil
}

// KubernetesOperatorManager manages Kubernetes-based IaC operations
type KubernetesOperatorManager struct {
    // Kubernetes Clients
    client             kubernetes.Interface
    dynamicClient      dynamic.Interface
    
    // Operator Management
    operatorRegistry   *OperatorRegistry
    crdManager         *CRDManager
    
    // Enterprise Features
    policyEngine       *KubernetesPolicyEngine
    securityScanner    *KubernetesSecurityScanner
    networkPolicyMgr   *NetworkPolicyManager
    
    // Advanced Features
    fluxIntegration    *FluxIntegration
    argoIntegration    *ArgoIntegration
    helmIntegration    *HelmIntegration
}

// DeployOperator deploys and manages Kubernetes operators
func (k *KubernetesOperatorManager) DeployOperator(
    ctx context.Context,
    operatorSpec *OperatorSpec,
) (*OperatorDeploymentResult, error) {
    
    // Validate operator specification
    if err := k.validateOperatorSpec(operatorSpec); err != nil {
        return nil, fmt.Errorf("operator spec validation failed: %w", err)
    }
    
    // Security scanning
    securityReport, err := k.securityScanner.ScanOperator(operatorSpec)
    if err != nil {
        return nil, fmt.Errorf("security scan failed: %w", err)
    }
    
    if securityReport.HasCriticalVulnerabilities() {
        return nil, fmt.Errorf("critical vulnerabilities detected in operator")
    }
    
    // Policy validation
    policyResult, err := k.policyEngine.ValidateOperator(operatorSpec)
    if err != nil {
        return nil, fmt.Errorf("policy validation failed: %w", err)
    }
    
    if !policyResult.Compliant {
        return nil, fmt.Errorf("operator violates policies: %v", policyResult.Violations)
    }
    
    // Deploy CRDs
    if err := k.crdManager.DeployCRDs(ctx, operatorSpec.CRDs); err != nil {
        return nil, fmt.Errorf("CRD deployment failed: %w", err)
    }
    
    // Deploy operator
    deployment, err := k.deployOperatorManifests(ctx, operatorSpec)
    if err != nil {
        return nil, fmt.Errorf("operator deployment failed: %w", err)
    }
    
    // Register operator
    if err := k.operatorRegistry.RegisterOperator(operatorSpec, deployment); err != nil {
        return nil, fmt.Errorf("operator registration failed: %w", err)
    }
    
    return &OperatorDeploymentResult{
        OperatorName: operatorSpec.Name,
        Namespace:    operatorSpec.Namespace,
        Deployment:   deployment,
        CRDs:         operatorSpec.CRDs,
        Status:       "deployed",
    }, nil
}

// EnterpriseWorkflowOrchestrator manages complex IaC workflows
type EnterpriseWorkflowOrchestrator struct {
    // Core Workflow Components
    workflowEngine        *WorkflowEngine
    executionCoordinator  *ExecutionCoordinator
    stateCoordinator      *StateCoordinator
    
    // Advanced Features
    dependencyResolver    *AdvancedDependencyResolver
    parallelExecutor      *ParallelExecutionEngine
    rollbackOrchestrator  *RollbackOrchestrator
    
    // Enterprise Requirements
    auditEngine           *WorkflowAuditEngine
    complianceTracker     *ComplianceTracker
    securityValidator     *SecurityValidator
    
    // Performance Features
    cacheOptimizer        *WorkflowCacheOptimizer
    resourceScheduler     *ResourceScheduler
    
    // Integration Points
    notificationEngine    *NotificationEngine
    metricsCollector      *WorkflowMetricsCollector
}

// WorkflowDefinition represents a comprehensive IaC workflow
type WorkflowDefinition struct {
    // Basic Properties
    ID              string                 `yaml:"id"`
    Name            string                 `yaml:"name"`
    Description     string                 `yaml:"description"`
    Version         string                 `yaml:"version"`
    
    // Workflow Structure
    Steps           []*WorkflowStep        `yaml:"steps"`
    Dependencies    map[string][]string    `yaml:"dependencies"`
    Conditions      []*WorkflowCondition   `yaml:"conditions"`
    
    // Enterprise Features
    Approvals       []*ApprovalStep        `yaml:"approvals"`
    Policies        []*PolicyValidation    `yaml:"policies"`
    SecurityChecks  []*SecurityCheck       `yaml:"security_checks"`
    
    // Execution Control
    Timeout         time.Duration          `yaml:"timeout"`
    RetryPolicy     *RetryPolicy           `yaml:"retry_policy"`
    RollbackPolicy  *RollbackPolicy        `yaml:"rollback_policy"`
    
    // Monitoring
    Notifications   []*NotificationRule    `yaml:"notifications"`
    Metrics         []*MetricDefinition    `yaml:"metrics"`
    
    // Environment Configuration
    Environments    map[string]*EnvConfig  `yaml:"environments"`
    Variables       map[string]*Variable   `yaml:"variables"`
}

// WorkflowStep defines individual workflow steps
type WorkflowStep struct {
    // Step Identity
    ID              string                 `yaml:"id"`
    Name            string                 `yaml:"name"`
    Type            WorkflowStepType       `yaml:"type"`
    
    // Execution Configuration
    Tool            string                 `yaml:"tool"`
    Action          string                 `yaml:"action"`
    Configuration   map[string]interface{} `yaml:"configuration"`
    
    // Dependencies and Conditions
    DependsOn       []string               `yaml:"depends_on"`
    Conditions      []*StepCondition       `yaml:"conditions"`
    
    // Error Handling
    OnFailure       *FailureAction         `yaml:"on_failure"`
    RetryPolicy     *StepRetryPolicy       `yaml:"retry_policy"`
    
    // Enterprise Features
    RequiresApproval bool                  `yaml:"requires_approval"`
    SecurityLevel    SecurityLevel          `yaml:"security_level"`
    CostThreshold    *CostThreshold         `yaml:"cost_threshold"`
    
    // Performance
    Timeout         time.Duration          `yaml:"timeout"`
    ResourceLimits  *ResourceLimits        `yaml:"resource_limits"`
}

// ExecuteWorkflow orchestrates comprehensive workflow execution
func (w *EnterpriseWorkflowOrchestrator) ExecuteWorkflow(
    ctx context.Context,
    workflow *WorkflowDefinition,
    environment string,
) (*WorkflowExecutionResult, error) {
    
    // Create execution context
    execCtx, err := w.createExecutionContext(ctx, workflow, environment)
    if err != nil {
        return nil, fmt.Errorf("failed to create execution context: %w", err)
    }
    
    // Pre-execution validation
    if err := w.validateWorkflow(execCtx, workflow); err != nil {
        return nil, fmt.Errorf("workflow validation failed: %w", err)
    }
    
    // Security validation
    if err := w.securityValidator.ValidateWorkflow(workflow); err != nil {
        return nil, fmt.Errorf("security validation failed: %w", err)
    }
    
    // Compliance checking
    complianceResult, err := w.complianceTracker.ValidateCompliance(workflow)
    if err != nil {
        return nil, fmt.Errorf("compliance validation failed: %w", err)
    }
    
    if !complianceResult.Compliant {
        return nil, fmt.Errorf("workflow violates compliance requirements: %v", complianceResult.Violations)
    }
    
    // Generate execution plan
    executionPlan, err := w.generateExecutionPlan(workflow)
    if err != nil {
        return nil, fmt.Errorf("failed to generate execution plan: %w", err)
    }
    
    // Execute with comprehensive monitoring
    result, err := w.executeWithMonitoring(execCtx, executionPlan)
    if err != nil {
        // Attempt automated recovery
        if recoveryErr := w.attemptRecovery(execCtx, executionPlan, err); recoveryErr != nil {
            return nil, fmt.Errorf("execution failed and recovery failed: %w, recovery: %w", err, recoveryErr)
        }
    }
    
    return result, nil
}

// generateExecutionPlan creates optimized execution plans
func (w *EnterpriseWorkflowOrchestrator) generateExecutionPlan(
    workflow *WorkflowDefinition,
) (*ExecutionPlan, error) {
    
    // Analyze dependencies
    dependencyGraph, err := w.dependencyResolver.BuildDependencyGraph(workflow.Steps)
    if err != nil {
        return nil, fmt.Errorf("failed to build dependency graph: %w", err)
    }
    
    // Detect cycles
    if cycles := w.dependencyResolver.DetectCycles(dependencyGraph); len(cycles) > 0 {
        return nil, fmt.Errorf("circular dependencies detected: %v", cycles)
    }
    
    // Identify parallel execution opportunities
    parallelGroups, err := w.parallelExecutor.IdentifyParallelGroups(dependencyGraph)
    if err != nil {
        return nil, fmt.Errorf("failed to identify parallel groups: %w", err)
    }
    
    // Optimize execution order
    optimizedOrder, err := w.optimizeExecutionOrder(dependencyGraph, parallelGroups)
    if err != nil {
        return nil, fmt.Errorf("failed to optimize execution order: %w", err)
    }
    
    // Generate rollback plan
    rollbackPlan, err := w.rollbackOrchestrator.GenerateRollbackPlan(optimizedOrder)
    if err != nil {
        return nil, fmt.Errorf("failed to generate rollback plan: %w", err)
    }
    
    return &ExecutionPlan{
        Steps:           optimizedOrder,
        ParallelGroups:  parallelGroups,
        RollbackPlan:    rollbackPlan,
        EstimatedDuration: w.estimateDuration(optimizedOrder),
        ResourceRequirements: w.calculateResourceRequirements(optimizedOrder),
    }, nil
}

// AdvancedDependencyResolver handles sophisticated dependency resolution
type AdvancedDependencyResolver struct {
    // Graph Analysis
    graphBuilder       *DependencyGraphBuilder
    cyclicDetector     *CyclicDependencyDetector
    criticalPathAnalyzer *CriticalPathAnalyzer
    
    // Dynamic Resolution
    runtimeResolver    *RuntimeDependencyResolver
    conditionalResolver *ConditionalDependencyResolver
    
    // Optimization
    parallelizationOptimizer *ParallelizationOptimizer
    executionOptimizer      *ExecutionOptimizer
}

// BuildAdvancedDependencyGraph creates comprehensive dependency graphs
func (r *AdvancedDependencyResolver) BuildAdvancedDependencyGraph(
    steps []*WorkflowStep,
) (*DependencyGraph, error) {
    
    // Initialize graph
    graph := NewDependencyGraph()
    
    // Add nodes for each step
    for _, step := range steps {
        node := &DependencyNode{
            ID:          step.ID,
            Step:        step,
            Dependencies: make([]*DependencyEdge, 0),
        }
        graph.AddNode(node)
    }
    
    // Add explicit dependencies
    for _, step := range steps {
        for _, depID := range step.DependsOn {
            depNode := graph.GetNode(depID)
            if depNode == nil {
                return nil, fmt.Errorf("dependency not found: %s", depID)
            }
            
            edge := &DependencyEdge{
                From:       depNode,
                To:         graph.GetNode(step.ID),
                Type:       ExplicitDependency,
                Weight:     1.0,
            }
            
            graph.AddEdge(edge)
        }
    }
    
    // Resolve implicit dependencies
    implicitDeps, err := r.resolveImplicitDependencies(steps)
    if err != nil {
        return nil, fmt.Errorf("failed to resolve implicit dependencies: %w", err)
    }
    
    for _, dep := range implicitDeps {
        edge := &DependencyEdge{
            From:   graph.GetNode(dep.From),
            To:     graph.GetNode(dep.To),
            Type:   ImplicitDependency,
            Weight: dep.Weight,
        }
        graph.AddEdge(edge)
    }
    
    // Add conditional dependencies
    conditionalDeps, err := r.conditionalResolver.ResolveConditionalDependencies(steps)
    if err != nil {
        return nil, fmt.Errorf("failed to resolve conditional dependencies: %w", err)
    }
    
    for _, dep := range conditionalDeps {
        edge := &DependencyEdge{
            From:      graph.GetNode(dep.From),
            To:        graph.GetNode(dep.To),
            Type:      ConditionalDependency,
            Condition: dep.Condition,
            Weight:    dep.Weight,
        }
        graph.AddEdge(edge)
    }
    
    return graph, nil
}

// ParallelExecutionEngine manages parallel workflow execution
type ParallelExecutionEngine struct {
    // Execution Management
    workerPool         *WorkerPool
    taskScheduler      *TaskScheduler
    resourceManager    *ResourceManager
    
    // Performance Optimization
    loadBalancer       *LoadBalancer
    executionOptimizer *ExecutionOptimizer
    
    // Monitoring
    progressTracker    *ProgressTracker
    performanceMonitor *PerformanceMonitor
    
    // Error Handling
    errorCollector     *ErrorCollector
    failureHandler     *FailureHandler
}

// ExecuteParallelSteps executes workflow steps in parallel
func (p *ParallelExecutionEngine) ExecuteParallelSteps(
    ctx context.Context,
    stepGroups []*ParallelStepGroup,
) (*ParallelExecutionResult, error) {
    
    results := make(chan *StepExecutionResult, len(stepGroups))
    errors := make(chan error, len(stepGroups))
    
    // Create worker pool
    workerPool := p.workerPool.CreatePool(ctx, p.calculateOptimalWorkers(stepGroups))
    defer workerPool.Close()
    
    // Submit tasks
    var wg sync.WaitGroup
    for _, group := range stepGroups {
        wg.Add(1)
        go func(group *ParallelStepGroup) {
            defer wg.Done()
            result, err := p.executeStepGroup(ctx, group, workerPool)
            if err != nil {
                errors <- err
                return
            }
            results <- result
        }(group)
    }
    
    // Wait for completion
    go func() {
        wg.Wait()
        close(results)
        close(errors)
    }()
    
    // Collect results
    var executionResults []*StepExecutionResult
    var executionErrors []error
    
    for {
        select {
        case result, ok := <-results:
            if !ok {
                results = nil
            } else {
                executionResults = append(executionResults, result)
            }
        case err, ok := <-errors:
            if !ok {
                errors = nil
            } else {
                executionErrors = append(executionErrors, err)
            }
        }
        
        if results == nil && errors == nil {
            break
        }
    }
    
    // Handle errors
    if len(executionErrors) > 0 {
        return nil, fmt.Errorf("parallel execution failed: %v", executionErrors)
    }
    
    return &ParallelExecutionResult{
        Results:           executionResults,
        TotalSteps:        p.countTotalSteps(stepGroups),
        ExecutionTime:     p.calculateExecutionTime(executionResults),
        ResourceUsage:     p.calculateResourceUsage(executionResults),
    }, nil
}