voirs_cli/error/
advanced_handler.rs

1//! Advanced error handling and recovery system
2//!
3//! This module provides sophisticated error handling capabilities including
4//! contextual error information, automatic recovery strategies, and user-friendly
5//! error reporting with actionable suggestions.
6
7use serde::{Deserialize, Serialize};
8use std::collections::HashMap;
9use std::fmt;
10use std::sync::Arc;
11use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
12use thiserror::Error;
13use tokio::sync::RwLock;
14
15/// Advanced error type with rich context and recovery information
16#[derive(Debug, Clone, Serialize, Deserialize, Error)]
17#[error("{message}")]
18pub struct AdvancedError {
19    /// Error classification
20    pub category: ErrorCategory,
21    /// Error severity level
22    pub severity: ErrorSeverity,
23    /// Human-readable error message
24    pub message: String,
25    /// Technical error details
26    pub technical_details: String,
27    /// Error context information
28    pub context: ErrorContext,
29    /// Suggested recovery actions
30    pub recovery_suggestions: Vec<RecoverySuggestion>,
31    /// Related errors (if this is caused by other errors)
32    pub related_errors: Vec<String>,
33    /// Timestamp when error occurred
34    pub timestamp: u64,
35    /// Unique error identifier
36    pub error_id: String,
37    /// Whether this error is recoverable
38    pub recoverable: bool,
39    /// Retry information
40    pub retry_info: Option<RetryInfo>,
41}
42
43/// Error categories for classification
44#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
45pub enum ErrorCategory {
46    /// Configuration errors
47    Configuration,
48    /// Network connectivity errors
49    Network,
50    /// File system errors
51    FileSystem,
52    /// Memory allocation errors
53    Memory,
54    /// Model loading errors
55    ModelLoading,
56    /// Audio processing errors
57    AudioProcessing,
58    /// Synthesis errors
59    Synthesis,
60    /// Authentication errors
61    Authentication,
62    /// Permission errors
63    Permission,
64    /// Resource exhaustion errors
65    ResourceExhaustion,
66    /// Dependency errors
67    Dependency,
68    /// Hardware errors
69    Hardware,
70    /// User input errors
71    UserInput,
72    /// Internal system errors
73    Internal,
74    /// External service errors
75    ExternalService,
76}
77
78/// Error severity levels
79#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
80pub enum ErrorSeverity {
81    /// Informational (not really an error)
82    Info,
83    /// Warning (operation can continue)
84    Warning,
85    /// Error (operation failed but system stable)
86    Error,
87    /// Critical (system functionality impaired)
88    Critical,
89    /// Fatal (system cannot continue)
90    Fatal,
91}
92
93/// Error context providing additional information
94#[derive(Debug, Clone, Serialize, Deserialize)]
95pub struct ErrorContext {
96    /// Operation that was being performed
97    pub operation: String,
98    /// User who encountered the error
99    pub user: Option<String>,
100    /// Session information
101    pub session_id: Option<String>,
102    /// Request information
103    pub request_id: Option<String>,
104    /// Component where error occurred
105    pub component: String,
106    /// Function/method where error occurred
107    pub function: Option<String>,
108    /// File and line number (for debugging)
109    pub location: Option<String>,
110    /// Additional context parameters
111    pub parameters: HashMap<String, String>,
112    /// System state at time of error
113    pub system_state: SystemState,
114    /// Performance metrics at error time
115    pub performance_metrics: Option<ErrorTimeMetrics>,
116}
117
118/// System state information
119#[derive(Debug, Clone, Serialize, Deserialize)]
120pub struct SystemState {
121    /// Available memory in bytes
122    pub available_memory_bytes: u64,
123    /// CPU usage percentage
124    pub cpu_usage_percent: f64,
125    /// Active operations count
126    pub active_operations: usize,
127    /// Queue depth
128    pub queue_depth: usize,
129    /// Last successful operation time
130    pub last_success_time: Option<u64>,
131    /// System uptime in seconds
132    pub uptime_seconds: u64,
133}
134
135/// Performance metrics at error time
136#[derive(Debug, Clone, Serialize, Deserialize)]
137pub struct ErrorTimeMetrics {
138    /// Latency when error occurred
139    pub latency_ms: u64,
140    /// Throughput when error occurred
141    pub throughput: f64,
142    /// Memory usage when error occurred
143    pub memory_usage_mb: f64,
144    /// Error rate before this error
145    pub recent_error_rate: f64,
146}
147
148/// Recovery suggestion with actionable steps
149#[derive(Debug, Clone, Serialize, Deserialize)]
150pub struct RecoverySuggestion {
151    /// Suggestion category
152    pub category: RecoveryCategory,
153    /// Priority level (1-10, 10 being highest)
154    pub priority: u8,
155    /// Human-readable suggestion
156    pub suggestion: String,
157    /// Detailed steps to resolve
158    pub steps: Vec<String>,
159    /// Expected resolution time
160    pub estimated_time: Duration,
161    /// Difficulty level
162    pub difficulty: DifficultyLevel,
163    /// Success probability (0.0-1.0)
164    pub success_probability: f64,
165    /// Whether this suggestion requires user action
166    pub requires_user_action: bool,
167    /// Commands or actions to execute
168    pub automated_actions: Vec<AutomatedAction>,
169}
170
171/// Recovery suggestion categories
172#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
173pub enum RecoveryCategory {
174    /// Immediate automatic recovery
175    AutomaticRecovery,
176    /// User configuration change
177    ConfigurationFix,
178    /// Resource management
179    ResourceOptimization,
180    /// Retry with different parameters
181    RetryOptimization,
182    /// System restart or reset
183    SystemRestart,
184    /// Software update or installation
185    SoftwareUpdate,
186    /// Hardware check or replacement
187    HardwareCheck,
188    /// Network troubleshooting
189    NetworkTroubleshooting,
190    /// Permission or authentication fix
191    PermissionFix,
192}
193
194/// Difficulty levels for recovery
195#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
196pub enum DifficultyLevel {
197    /// Trivial (automatic or one-click)
198    Trivial,
199    /// Easy (basic user action)
200    Easy,
201    /// Medium (some technical knowledge required)
202    Medium,
203    /// Hard (advanced technical knowledge required)
204    Hard,
205    /// Expert (requires expert assistance)
206    Expert,
207}
208
209/// Automated action that can be taken
210#[derive(Debug, Clone, Serialize, Deserialize)]
211pub struct AutomatedAction {
212    /// Action type
213    pub action_type: ActionType,
214    /// Action description
215    pub description: String,
216    /// Parameters for the action
217    pub parameters: HashMap<String, String>,
218    /// Whether this action is safe to execute automatically
219    pub safe_to_automate: bool,
220    /// Expected execution time
221    pub execution_time: Duration,
222    /// Action dependencies
223    pub dependencies: Vec<String>,
224}
225
226/// Types of automated actions
227#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
228pub enum ActionType {
229    /// Restart a service or component
230    RestartService,
231    /// Clear cache or temporary files
232    ClearCache,
233    /// Adjust configuration parameters
234    AdjustConfiguration,
235    /// Retry the failed operation
236    RetryOperation,
237    /// Reduce resource usage
238    ReduceResources,
239    /// Switch to fallback mode
240    EnableFallback,
241    /// Update software component
242    UpdateSoftware,
243    /// Check system resources
244    CheckResources,
245    /// Validate configuration
246    ValidateConfiguration,
247    /// Repair corrupted data
248    RepairData,
249}
250
251/// Retry information for recoverable errors
252#[derive(Debug, Clone, Serialize, Deserialize)]
253pub struct RetryInfo {
254    /// Current retry attempt (0 = first attempt)
255    pub attempt: usize,
256    /// Maximum retry attempts
257    pub max_attempts: usize,
258    /// Delay before next retry
259    pub retry_delay: Duration,
260    /// Backoff strategy
261    pub backoff_strategy: BackoffStrategy,
262    /// Last retry time
263    pub last_retry: Option<u64>,
264    /// Retry success history
265    pub success_history: Vec<bool>,
266}
267
268/// Backoff strategies for retries
269#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
270pub enum BackoffStrategy {
271    /// Fixed delay between retries
272    Fixed,
273    /// Linear increase in delay
274    Linear,
275    /// Exponential backoff
276    Exponential,
277    /// Fibonacci sequence
278    Fibonacci,
279    /// Custom delay sequence
280    Custom(Vec<u64>),
281}
282
283/// Error pattern for detection and analysis
284#[derive(Debug, Clone, Serialize, Deserialize)]
285pub struct ErrorPattern {
286    /// Pattern identifier
287    pub pattern_id: String,
288    /// Pattern description
289    pub description: String,
290    /// Error categories involved
291    pub categories: Vec<ErrorCategory>,
292    /// Minimum occurrences to trigger pattern
293    pub min_occurrences: usize,
294    /// Time window for pattern detection
295    pub time_window: Duration,
296    /// Pattern-specific recovery strategy
297    pub recovery_strategy: RecoveryStrategy,
298    /// Pattern confidence score
299    pub confidence: f64,
300}
301
302/// Recovery strategies for error patterns
303#[derive(Debug, Clone, Serialize, Deserialize)]
304pub struct RecoveryStrategy {
305    /// Strategy name
306    pub name: String,
307    /// Automatic recovery actions
308    pub automatic_actions: Vec<AutomatedAction>,
309    /// Manual recovery steps
310    pub manual_steps: Vec<String>,
311    /// Conditions for applying this strategy
312    pub conditions: Vec<String>,
313    /// Expected success rate
314    pub success_rate: f64,
315    /// Recovery time estimate
316    pub recovery_time: Duration,
317}
318
319/// Advanced error handler with pattern detection and recovery
320pub struct AdvancedErrorHandler {
321    /// Error history for pattern analysis
322    error_history: Arc<RwLock<Vec<AdvancedError>>>,
323    /// Detected error patterns
324    detected_patterns: Arc<RwLock<HashMap<String, ErrorPattern>>>,
325    /// Recovery success statistics
326    recovery_stats: Arc<RwLock<RecoveryStatistics>>,
327    /// Configuration for error handling
328    config: ErrorHandlerConfig,
329    /// Pattern detection rules
330    pattern_rules: Vec<ErrorPattern>,
331    /// Recovery action handlers
332    action_handlers: HashMap<ActionType, Box<dyn ActionHandler>>,
333}
334
335/// Recovery statistics tracking
336#[derive(Debug, Clone, Default, Serialize, Deserialize)]
337pub struct RecoveryStatistics {
338    /// Total errors encountered
339    pub total_errors: u64,
340    /// Total recovery attempts
341    pub recovery_attempts: u64,
342    /// Successful recoveries
343    pub successful_recoveries: u64,
344    /// Recovery success rate
345    pub success_rate: f64,
346    /// Average recovery time
347    pub avg_recovery_time_ms: f64,
348    /// Error category statistics
349    pub category_stats: HashMap<ErrorCategory, CategoryStats>,
350    /// Pattern detection statistics
351    pub pattern_stats: HashMap<String, PatternStats>,
352}
353
354/// Statistics per error category
355#[derive(Debug, Clone, Default, Serialize, Deserialize)]
356pub struct CategoryStats {
357    /// Total occurrences
358    pub count: u64,
359    /// Recovery success rate for this category
360    pub recovery_rate: f64,
361    /// Average time to recover
362    pub avg_recovery_time_ms: f64,
363    /// Most effective recovery method
364    pub best_recovery_method: Option<RecoveryCategory>,
365}
366
367/// Statistics per error pattern
368#[derive(Debug, Clone, Default, Serialize, Deserialize)]
369pub struct PatternStats {
370    /// Times this pattern was detected
371    pub detection_count: u64,
372    /// Times recovery was attempted for this pattern
373    pub recovery_attempts: u64,
374    /// Successful recoveries for this pattern
375    pub successful_recoveries: u64,
376    /// Pattern-specific success rate
377    pub success_rate: f64,
378}
379
380/// Configuration for error handler
381#[derive(Debug, Clone, Serialize, Deserialize)]
382pub struct ErrorHandlerConfig {
383    /// Enable pattern detection
384    pub enable_pattern_detection: bool,
385    /// Enable automatic recovery
386    pub enable_auto_recovery: bool,
387    /// Maximum error history size
388    pub max_error_history: usize,
389    /// Pattern detection sensitivity (0.0-1.0)
390    pub pattern_sensitivity: f64,
391    /// Maximum automatic recovery attempts
392    pub max_auto_recovery_attempts: usize,
393    /// Error reporting configuration
394    pub reporting_config: ErrorReportingConfig,
395    /// Recovery timeout
396    pub recovery_timeout: Duration,
397}
398
399/// Error reporting configuration
400#[derive(Debug, Clone, Serialize, Deserialize)]
401pub struct ErrorReportingConfig {
402    /// Enable detailed error logging
403    pub detailed_logging: bool,
404    /// Log file path
405    pub log_file_path: Option<String>,
406    /// Enable error telemetry
407    pub enable_telemetry: bool,
408    /// Telemetry endpoint
409    pub telemetry_endpoint: Option<String>,
410    /// Enable user notifications
411    pub enable_notifications: bool,
412    /// Notification severity threshold
413    pub notification_threshold: ErrorSeverity,
414}
415
416/// Action handler trait for automated recovery
417pub trait ActionHandler: Send + Sync {
418    /// Execute the automated action
419    fn execute(&self, action: &AutomatedAction) -> Result<ActionResult, ActionError>;
420
421    /// Validate if action can be executed
422    fn can_execute(&self, action: &AutomatedAction) -> bool;
423
424    /// Get estimated execution time
425    fn estimated_time(&self, action: &AutomatedAction) -> Duration;
426}
427
428/// Result of an automated action
429#[derive(Debug, Clone, Serialize, Deserialize)]
430pub struct ActionResult {
431    /// Whether action succeeded
432    pub success: bool,
433    /// Result message
434    pub message: String,
435    /// Execution time
436    pub execution_time: Duration,
437    /// Additional result data
438    pub data: HashMap<String, String>,
439}
440
441/// Error from automated action execution
442#[derive(Debug, Error)]
443pub enum ActionError {
444    #[error("Action execution failed: {message}")]
445    ExecutionFailed { message: String },
446    #[error("Action not supported: {action_type:?}")]
447    NotSupported { action_type: ActionType },
448    #[error("Action timed out after {timeout:?}")]
449    Timeout { timeout: Duration },
450    #[error("Action dependencies not met: {missing:?}")]
451    DependenciesMissing { missing: Vec<String> },
452}
453
454impl AdvancedErrorHandler {
455    /// Create a new advanced error handler
456    pub fn new(config: ErrorHandlerConfig) -> Self {
457        Self {
458            error_history: Arc::new(RwLock::new(Vec::new())),
459            detected_patterns: Arc::new(RwLock::new(HashMap::new())),
460            recovery_stats: Arc::new(RwLock::new(RecoveryStatistics::default())),
461            config,
462            pattern_rules: Self::default_pattern_rules(),
463            action_handlers: Self::default_action_handlers(),
464        }
465    }
466
467    /// Handle an error with advanced processing
468    pub async fn handle_error(&self, error: AdvancedError) -> ErrorHandlingResult {
469        tracing::error!(
470            "Handling advanced error: {} ({})",
471            error.message,
472            error.error_id
473        );
474
475        // Record error in history
476        self.record_error(&error).await;
477
478        // Update statistics
479        self.update_statistics(&error).await;
480
481        // Detect patterns
482        let detected_patterns = if self.config.enable_pattern_detection {
483            self.detect_patterns(&error).await
484        } else {
485            Vec::new()
486        };
487
488        // Attempt recovery
489        let recovery_result = if self.config.enable_auto_recovery && error.recoverable {
490            self.attempt_recovery(&error).await
491        } else {
492            RecoveryResult::NotAttempted
493        };
494
495        // Generate user-friendly report
496        let user_report = self
497            .generate_user_report(&error, &detected_patterns, &recovery_result)
498            .await;
499
500        ErrorHandlingResult {
501            error_id: error.error_id.clone(),
502            handled: true,
503            recovery_result,
504            detected_patterns,
505            user_report,
506            automated_actions_taken: self.get_automated_actions(&error).await,
507            recommendations: error.recovery_suggestions.clone(),
508        }
509    }
510
511    /// Record error in history
512    async fn record_error(&self, error: &AdvancedError) {
513        let mut history = self.error_history.write().await;
514        history.push(error.clone());
515
516        // Maintain history size limit
517        if history.len() > self.config.max_error_history {
518            history.remove(0);
519        }
520    }
521
522    /// Update recovery statistics
523    async fn update_statistics(&self, error: &AdvancedError) {
524        let mut stats = self.recovery_stats.write().await;
525        stats.total_errors += 1;
526
527        // Update category statistics
528        let category_stats = stats.category_stats.entry(error.category).or_default();
529        category_stats.count += 1;
530    }
531
532    /// Detect error patterns
533    async fn detect_patterns(&self, current_error: &AdvancedError) -> Vec<String> {
534        let mut detected = Vec::new();
535        let history = self.error_history.read().await;
536
537        for pattern in &self.pattern_rules {
538            if self.matches_pattern(pattern, current_error, &history) {
539                detected.push(pattern.pattern_id.clone());
540
541                // Record pattern detection
542                let mut patterns = self.detected_patterns.write().await;
543                patterns.insert(pattern.pattern_id.clone(), pattern.clone());
544            }
545        }
546
547        detected
548    }
549
550    /// Check if error matches a pattern
551    fn matches_pattern(
552        &self,
553        pattern: &ErrorPattern,
554        error: &AdvancedError,
555        history: &[AdvancedError],
556    ) -> bool {
557        // Check if error category matches pattern
558        if !pattern.categories.contains(&error.category) {
559            return false;
560        }
561
562        // Count recent occurrences of similar errors
563        let cutoff_time = SystemTime::now()
564            .duration_since(SystemTime::UNIX_EPOCH)
565            .unwrap_or_default()
566            .as_secs()
567            .saturating_sub(pattern.time_window.as_secs());
568
569        let recent_similar_errors = history
570            .iter()
571            .filter(|e| e.timestamp >= cutoff_time)
572            .filter(|e| pattern.categories.contains(&e.category))
573            .count();
574
575        recent_similar_errors >= pattern.min_occurrences
576    }
577
578    /// Attempt automatic recovery
579    async fn attempt_recovery(&self, error: &AdvancedError) -> RecoveryResult {
580        tracing::info!(
581            "Attempting automatic recovery for error: {}",
582            error.error_id
583        );
584
585        let mut stats = self.recovery_stats.write().await;
586        stats.recovery_attempts += 1;
587        drop(stats);
588
589        // Try recovery suggestions in priority order
590        let mut sorted_suggestions = error.recovery_suggestions.clone();
591        sorted_suggestions.sort_by(|a, b| b.priority.cmp(&a.priority));
592
593        for suggestion in sorted_suggestions {
594            if suggestion.category == RecoveryCategory::AutomaticRecovery {
595                match self
596                    .execute_recovery_actions(&suggestion.automated_actions)
597                    .await
598                {
599                    Ok(results) => {
600                        if results.iter().all(|r| r.success) {
601                            let mut stats = self.recovery_stats.write().await;
602                            stats.successful_recoveries += 1;
603                            stats.success_rate =
604                                stats.successful_recoveries as f64 / stats.recovery_attempts as f64;
605
606                            return RecoveryResult::Successful {
607                                method: suggestion.category,
608                                actions_taken: results,
609                                recovery_time: suggestion.estimated_time,
610                            };
611                        }
612                    }
613                    Err(e) => {
614                        tracing::warn!("Recovery action failed: {}", e);
615                    }
616                }
617            }
618        }
619
620        RecoveryResult::Failed {
621            reason: "No successful automatic recovery method found".to_string(),
622            attempted_methods: error
623                .recovery_suggestions
624                .iter()
625                .map(|s| s.category.clone())
626                .collect(),
627        }
628    }
629
630    /// Execute recovery actions
631    async fn execute_recovery_actions(
632        &self,
633        actions: &[AutomatedAction],
634    ) -> Result<Vec<ActionResult>, ActionError> {
635        let mut results = Vec::new();
636
637        for action in actions {
638            if let Some(handler) = self.action_handlers.get(&action.action_type) {
639                if handler.can_execute(action) {
640                    match handler.execute(action) {
641                        Ok(result) => results.push(result),
642                        Err(e) => return Err(e),
643                    }
644                } else {
645                    return Err(ActionError::NotSupported {
646                        action_type: action.action_type.clone(),
647                    });
648                }
649            }
650        }
651
652        Ok(results)
653    }
654
655    /// Generate user-friendly error report
656    async fn generate_user_report(
657        &self,
658        error: &AdvancedError,
659        patterns: &[String],
660        recovery: &RecoveryResult,
661    ) -> UserErrorReport {
662        UserErrorReport {
663            title: self.generate_user_friendly_title(error),
664            summary: self.generate_error_summary(error),
665            impact: self.assess_user_impact(error),
666            what_happened: self.explain_what_happened(error),
667            why_it_happened: self.explain_why_it_happened(error, patterns),
668            what_we_did: self.explain_recovery_actions(recovery),
669            what_you_can_do: self.generate_user_actions(error),
670            prevention_tips: self.generate_prevention_tips(error),
671            technical_details: if self.config.reporting_config.detailed_logging {
672                Some(error.technical_details.clone())
673            } else {
674                None
675            },
676            support_info: self.generate_support_info(error),
677        }
678    }
679
680    /// Generate user-friendly error title
681    fn generate_user_friendly_title(&self, error: &AdvancedError) -> String {
682        match error.category {
683            ErrorCategory::Network => "Network Connection Issue".to_string(),
684            ErrorCategory::Memory => "Memory Issue Detected".to_string(),
685            ErrorCategory::ModelLoading => "Model Loading Problem".to_string(),
686            ErrorCategory::AudioProcessing => "Audio Processing Error".to_string(),
687            ErrorCategory::Synthesis => "Voice Synthesis Issue".to_string(),
688            ErrorCategory::Configuration => "Configuration Problem".to_string(),
689            ErrorCategory::FileSystem => "File System Error".to_string(),
690            ErrorCategory::Authentication => "Authentication Issue".to_string(),
691            ErrorCategory::Permission => "Permission Error".to_string(),
692            ErrorCategory::ResourceExhaustion => "System Resources Low".to_string(),
693            ErrorCategory::Dependency => "Dependency Issue".to_string(),
694            ErrorCategory::Hardware => "Hardware Problem Detected".to_string(),
695            ErrorCategory::UserInput => "Input Validation Error".to_string(),
696            ErrorCategory::Internal => "Internal System Error".to_string(),
697            ErrorCategory::ExternalService => "External Service Issue".to_string(),
698        }
699    }
700
701    /// Generate error summary
702    fn generate_error_summary(&self, error: &AdvancedError) -> String {
703        match error.severity {
704            ErrorSeverity::Info => format!("Information: {}", error.message),
705            ErrorSeverity::Warning => {
706                format!("Warning: {} This may affect performance.", error.message)
707            }
708            ErrorSeverity::Error => format!(
709                "Error: {} The current operation could not be completed.",
710                error.message
711            ),
712            ErrorSeverity::Critical => format!(
713                "Critical Issue: {} System functionality may be impaired.",
714                error.message
715            ),
716            ErrorSeverity::Fatal => format!(
717                "Fatal Error: {} System cannot continue normal operation.",
718                error.message
719            ),
720        }
721    }
722
723    /// Assess user impact
724    fn assess_user_impact(&self, error: &AdvancedError) -> UserImpact {
725        match (error.severity, error.category) {
726            (ErrorSeverity::Fatal, _) => UserImpact::Severe,
727            (ErrorSeverity::Critical, _) => UserImpact::High,
728            (ErrorSeverity::Error, ErrorCategory::Synthesis) => UserImpact::Medium,
729            (ErrorSeverity::Error, ErrorCategory::AudioProcessing) => UserImpact::Medium,
730            (ErrorSeverity::Warning, _) => UserImpact::Low,
731            (ErrorSeverity::Info, _) => UserImpact::None,
732            _ => UserImpact::Medium,
733        }
734    }
735
736    /// Explain what happened
737    fn explain_what_happened(&self, error: &AdvancedError) -> String {
738        format!(
739            "While performing '{}', an issue occurred in the {} component. {}",
740            error.context.operation,
741            error.context.component,
742            match error.category {
743                ErrorCategory::Network =>
744                    "The system could not connect to the required network service.",
745                ErrorCategory::Memory => "The system ran low on available memory.",
746                ErrorCategory::ModelLoading => "The voice model could not be loaded properly.",
747                ErrorCategory::AudioProcessing =>
748                    "The audio data could not be processed as expected.",
749                ErrorCategory::Synthesis => "The voice synthesis process encountered an issue.",
750                _ => "An unexpected condition was encountered.",
751            }
752        )
753    }
754
755    /// Explain why it happened
756    fn explain_why_it_happened(&self, error: &AdvancedError, patterns: &[String]) -> String {
757        if !patterns.is_empty() {
758            format!(
759                "This appears to be part of a known pattern: {}. Common causes include resource constraints, network instability, or configuration issues.",
760                patterns.join(", ")
761            )
762        } else {
763            match error.category {
764                ErrorCategory::Network => "This could be due to internet connectivity issues, firewall restrictions, or service outages.".to_string(),
765                ErrorCategory::Memory => "This typically happens when the system is processing large amounts of data or when other applications are using significant memory.".to_string(),
766                ErrorCategory::ModelLoading => "This may occur if model files are corrupted, missing, or incompatible with the current system.".to_string(),
767                _ => "The exact cause is being investigated. This may be a temporary issue.".to_string(),
768            }
769        }
770    }
771
772    /// Explain recovery actions taken
773    fn explain_recovery_actions(&self, recovery: &RecoveryResult) -> String {
774        match recovery {
775            RecoveryResult::Successful {
776                method,
777                actions_taken,
778                ..
779            } => {
780                format!(
781                    "We automatically attempted to resolve this issue using {} and took {} recovery actions. The issue appears to be resolved.",
782                    Self::recovery_method_description(method),
783                    actions_taken.len()
784                )
785            }
786            RecoveryResult::Failed {
787                attempted_methods, ..
788            } => {
789                format!(
790                    "We attempted automatic recovery using {} methods, but the issue persists and requires manual intervention.",
791                    attempted_methods.len()
792                )
793            }
794            RecoveryResult::NotAttempted => {
795                "No automatic recovery was attempted for this type of issue.".to_string()
796            }
797        }
798    }
799
800    /// Generate user actions
801    fn generate_user_actions(&self, error: &AdvancedError) -> Vec<String> {
802        let mut actions = Vec::new();
803
804        // Add general actions based on error category
805        match error.category {
806            ErrorCategory::Network => {
807                actions.push("Check your internet connection".to_string());
808                actions.push("Try again in a few moments".to_string());
809                actions.push("Check if any firewalls are blocking the connection".to_string());
810            }
811            ErrorCategory::Memory => {
812                actions.push("Close other applications to free up memory".to_string());
813                actions.push("Try processing smaller amounts of data at once".to_string());
814                actions.push("Restart the application if the issue persists".to_string());
815            }
816            ErrorCategory::ModelLoading => {
817                actions.push("Verify that all required model files are present".to_string());
818                actions.push("Try re-downloading the models if available".to_string());
819                actions.push("Check available disk space".to_string());
820            }
821            _ => {
822                actions.push("Try the operation again".to_string());
823                actions.push("Check the system logs for more details".to_string());
824            }
825        }
826
827        // Add specific recovery suggestions
828        for suggestion in &error.recovery_suggestions {
829            if suggestion.requires_user_action && suggestion.difficulty == DifficultyLevel::Easy {
830                actions.push(suggestion.suggestion.clone());
831            }
832        }
833
834        actions
835    }
836
837    /// Generate prevention tips
838    fn generate_prevention_tips(&self, error: &AdvancedError) -> Vec<String> {
839        match error.category {
840            ErrorCategory::Network => vec![
841                "Ensure stable internet connection before starting operations".to_string(),
842                "Consider using offline mode when available".to_string(),
843            ],
844            ErrorCategory::Memory => vec![
845                "Close unnecessary applications before processing large tasks".to_string(),
846                "Process data in smaller batches".to_string(),
847                "Consider upgrading system memory if this occurs frequently".to_string(),
848            ],
849            ErrorCategory::ModelLoading => vec![
850                "Regularly verify model file integrity".to_string(),
851                "Keep models updated to the latest versions".to_string(),
852                "Ensure sufficient disk space for model storage".to_string(),
853            ],
854            _ => vec![
855                "Keep the application updated to the latest version".to_string(),
856                "Monitor system resources during heavy operations".to_string(),
857            ],
858        }
859    }
860
861    /// Generate support information
862    fn generate_support_info(&self, error: &AdvancedError) -> SupportInfo {
863        SupportInfo {
864            error_id: error.error_id.clone(),
865            timestamp: error.timestamp,
866            component: error.context.component.clone(),
867            severity: error.severity,
868            category: error.category,
869            session_id: error.context.session_id.clone(),
870            request_id: error.context.request_id.clone(),
871            support_url: Some("https://support.voirs.com".to_string()),
872            documentation_links: self.get_relevant_documentation_links(&error.category),
873        }
874    }
875
876    /// Get automated actions taken
877    async fn get_automated_actions(&self, error: &AdvancedError) -> Vec<String> {
878        error
879            .recovery_suggestions
880            .iter()
881            .filter(|s| s.category == RecoveryCategory::AutomaticRecovery)
882            .flat_map(|s| s.automated_actions.iter())
883            .map(|a| a.description.clone())
884            .collect()
885    }
886
887    /// Get relevant documentation links
888    fn get_relevant_documentation_links(&self, category: &ErrorCategory) -> Vec<String> {
889        match category {
890            ErrorCategory::Network => vec![
891                "https://docs.voirs.com/troubleshooting/network".to_string(),
892                "https://docs.voirs.com/configuration/connectivity".to_string(),
893            ],
894            ErrorCategory::Memory => vec![
895                "https://docs.voirs.com/performance/memory-optimization".to_string(),
896                "https://docs.voirs.com/troubleshooting/performance".to_string(),
897            ],
898            ErrorCategory::ModelLoading => vec![
899                "https://docs.voirs.com/models/installation".to_string(),
900                "https://docs.voirs.com/troubleshooting/models".to_string(),
901            ],
902            _ => vec!["https://docs.voirs.com/troubleshooting".to_string()],
903        }
904    }
905
906    /// Get recovery method description
907    fn recovery_method_description(method: &RecoveryCategory) -> &'static str {
908        match method {
909            RecoveryCategory::AutomaticRecovery => "automatic system recovery",
910            RecoveryCategory::ConfigurationFix => "configuration adjustment",
911            RecoveryCategory::ResourceOptimization => "resource optimization",
912            RecoveryCategory::RetryOptimization => "intelligent retry",
913            RecoveryCategory::SystemRestart => "system restart",
914            RecoveryCategory::SoftwareUpdate => "software update",
915            RecoveryCategory::HardwareCheck => "hardware validation",
916            RecoveryCategory::NetworkTroubleshooting => "network diagnostics",
917            RecoveryCategory::PermissionFix => "permission correction",
918        }
919    }
920
921    /// Get default pattern rules
922    fn default_pattern_rules() -> Vec<ErrorPattern> {
923        vec![
924            ErrorPattern {
925                pattern_id: "network_instability".to_string(),
926                description: "Repeated network connection failures".to_string(),
927                categories: vec![ErrorCategory::Network, ErrorCategory::ExternalService],
928                min_occurrences: 3,
929                time_window: Duration::from_secs(300), // 5 minutes
930                recovery_strategy: RecoveryStrategy {
931                    name: "Network Recovery".to_string(),
932                    automatic_actions: vec![AutomatedAction {
933                        action_type: ActionType::RetryOperation,
934                        description: "Retry with exponential backoff".to_string(),
935                        parameters: HashMap::new(),
936                        safe_to_automate: true,
937                        execution_time: Duration::from_secs(30),
938                        dependencies: vec![],
939                    }],
940                    manual_steps: vec!["Check network connection".to_string()],
941                    conditions: vec!["Network errors > 3 in 5 minutes".to_string()],
942                    success_rate: 0.8,
943                    recovery_time: Duration::from_secs(60),
944                },
945                confidence: 0.9,
946            },
947            ErrorPattern {
948                pattern_id: "memory_pressure".to_string(),
949                description: "System running low on memory".to_string(),
950                categories: vec![ErrorCategory::Memory, ErrorCategory::ResourceExhaustion],
951                min_occurrences: 2,
952                time_window: Duration::from_secs(120), // 2 minutes
953                recovery_strategy: RecoveryStrategy {
954                    name: "Memory Optimization".to_string(),
955                    automatic_actions: vec![
956                        AutomatedAction {
957                            action_type: ActionType::ClearCache,
958                            description: "Clear system caches".to_string(),
959                            parameters: HashMap::new(),
960                            safe_to_automate: true,
961                            execution_time: Duration::from_secs(10),
962                            dependencies: vec![],
963                        },
964                        AutomatedAction {
965                            action_type: ActionType::ReduceResources,
966                            description: "Reduce memory usage".to_string(),
967                            parameters: HashMap::new(),
968                            safe_to_automate: true,
969                            execution_time: Duration::from_secs(5),
970                            dependencies: vec![],
971                        },
972                    ],
973                    manual_steps: vec!["Close unnecessary applications".to_string()],
974                    conditions: vec!["Memory errors in short timespan".to_string()],
975                    success_rate: 0.7,
976                    recovery_time: Duration::from_secs(30),
977                },
978                confidence: 0.85,
979            },
980        ]
981    }
982
983    /// Get default action handlers
984    fn default_action_handlers() -> HashMap<ActionType, Box<dyn ActionHandler>> {
985        // In a real implementation, these would be actual handlers
986        HashMap::new()
987    }
988}
989
990/// Result of error handling
991#[derive(Debug, Clone, Serialize, Deserialize)]
992pub struct ErrorHandlingResult {
993    /// Error identifier
994    pub error_id: String,
995    /// Whether error was handled
996    pub handled: bool,
997    /// Recovery result
998    pub recovery_result: RecoveryResult,
999    /// Detected error patterns
1000    pub detected_patterns: Vec<String>,
1001    /// User-friendly error report
1002    pub user_report: UserErrorReport,
1003    /// Automated actions that were taken
1004    pub automated_actions_taken: Vec<String>,
1005    /// Recovery recommendations
1006    pub recommendations: Vec<RecoverySuggestion>,
1007}
1008
1009/// Result of recovery attempt
1010#[derive(Debug, Clone, Serialize, Deserialize)]
1011pub enum RecoveryResult {
1012    /// Recovery was successful
1013    Successful {
1014        method: RecoveryCategory,
1015        actions_taken: Vec<ActionResult>,
1016        recovery_time: Duration,
1017    },
1018    /// Recovery failed
1019    Failed {
1020        reason: String,
1021        attempted_methods: Vec<RecoveryCategory>,
1022    },
1023    /// Recovery was not attempted
1024    NotAttempted,
1025}
1026
1027/// User-friendly error report
1028#[derive(Debug, Clone, Serialize, Deserialize)]
1029pub struct UserErrorReport {
1030    /// User-friendly title
1031    pub title: String,
1032    /// Brief summary
1033    pub summary: String,
1034    /// Impact on user
1035    pub impact: UserImpact,
1036    /// What happened explanation
1037    pub what_happened: String,
1038    /// Why it happened explanation
1039    pub why_it_happened: String,
1040    /// What the system did automatically
1041    pub what_we_did: String,
1042    /// What the user can do
1043    pub what_you_can_do: Vec<String>,
1044    /// Prevention tips
1045    pub prevention_tips: Vec<String>,
1046    /// Technical details (optional)
1047    pub technical_details: Option<String>,
1048    /// Support information
1049    pub support_info: SupportInfo,
1050}
1051
1052/// User impact levels
1053#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
1054pub enum UserImpact {
1055    /// No impact on user experience
1056    None,
1057    /// Minor impact, barely noticeable
1058    Low,
1059    /// Moderate impact, some functionality affected
1060    Medium,
1061    /// High impact, significant functionality affected
1062    High,
1063    /// Severe impact, system unusable
1064    Severe,
1065}
1066
1067/// Support information
1068#[derive(Debug, Clone, Serialize, Deserialize)]
1069pub struct SupportInfo {
1070    /// Error identifier for support
1071    pub error_id: String,
1072    /// Error timestamp
1073    pub timestamp: u64,
1074    /// Component that failed
1075    pub component: String,
1076    /// Error severity
1077    pub severity: ErrorSeverity,
1078    /// Error category
1079    pub category: ErrorCategory,
1080    /// Session identifier
1081    pub session_id: Option<String>,
1082    /// Request identifier
1083    pub request_id: Option<String>,
1084    /// Support URL
1085    pub support_url: Option<String>,
1086    /// Relevant documentation links
1087    pub documentation_links: Vec<String>,
1088}
1089
1090impl Default for ErrorHandlerConfig {
1091    fn default() -> Self {
1092        Self {
1093            enable_pattern_detection: true,
1094            enable_auto_recovery: true,
1095            max_error_history: 1000,
1096            pattern_sensitivity: 0.8,
1097            max_auto_recovery_attempts: 3,
1098            reporting_config: ErrorReportingConfig::default(),
1099            recovery_timeout: Duration::from_secs(60),
1100        }
1101    }
1102}
1103
1104impl Default for ErrorReportingConfig {
1105    fn default() -> Self {
1106        Self {
1107            detailed_logging: true,
1108            log_file_path: Some("voirs-errors.log".to_string()),
1109            enable_telemetry: false,
1110            telemetry_endpoint: None,
1111            enable_notifications: true,
1112            notification_threshold: ErrorSeverity::Error,
1113        }
1114    }
1115}
1116
1117impl fmt::Display for ErrorSeverity {
1118    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1119        match self {
1120            ErrorSeverity::Info => write!(f, "INFO"),
1121            ErrorSeverity::Warning => write!(f, "WARNING"),
1122            ErrorSeverity::Error => write!(f, "ERROR"),
1123            ErrorSeverity::Critical => write!(f, "CRITICAL"),
1124            ErrorSeverity::Fatal => write!(f, "FATAL"),
1125        }
1126    }
1127}
1128
1129impl fmt::Display for ErrorCategory {
1130    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1131        match self {
1132            ErrorCategory::Configuration => write!(f, "Configuration"),
1133            ErrorCategory::Network => write!(f, "Network"),
1134            ErrorCategory::FileSystem => write!(f, "FileSystem"),
1135            ErrorCategory::Memory => write!(f, "Memory"),
1136            ErrorCategory::ModelLoading => write!(f, "ModelLoading"),
1137            ErrorCategory::AudioProcessing => write!(f, "AudioProcessing"),
1138            ErrorCategory::Synthesis => write!(f, "Synthesis"),
1139            ErrorCategory::Authentication => write!(f, "Authentication"),
1140            ErrorCategory::Permission => write!(f, "Permission"),
1141            ErrorCategory::ResourceExhaustion => write!(f, "ResourceExhaustion"),
1142            ErrorCategory::Dependency => write!(f, "Dependency"),
1143            ErrorCategory::Hardware => write!(f, "Hardware"),
1144            ErrorCategory::UserInput => write!(f, "UserInput"),
1145            ErrorCategory::Internal => write!(f, "Internal"),
1146            ErrorCategory::ExternalService => write!(f, "ExternalService"),
1147        }
1148    }
1149}
1150
1151#[cfg(test)]
1152mod tests {
1153    use super::*;
1154
1155    #[tokio::test]
1156    async fn test_error_handler_creation() {
1157        let config = ErrorHandlerConfig::default();
1158        let handler = AdvancedErrorHandler::new(config);
1159
1160        // Test basic creation
1161        assert!(handler.pattern_rules.len() > 0);
1162    }
1163
1164    #[tokio::test]
1165    async fn test_error_handling() {
1166        let config = ErrorHandlerConfig::default();
1167        let handler = AdvancedErrorHandler::new(config);
1168
1169        let error = AdvancedError {
1170            category: ErrorCategory::Network,
1171            severity: ErrorSeverity::Error,
1172            message: "Connection failed".to_string(),
1173            technical_details: "TCP connection timeout".to_string(),
1174            context: ErrorContext {
1175                operation: "test_operation".to_string(),
1176                user: None,
1177                session_id: None,
1178                request_id: None,
1179                component: "network_client".to_string(),
1180                function: Some("connect".to_string()),
1181                location: None,
1182                parameters: HashMap::new(),
1183                system_state: SystemState {
1184                    available_memory_bytes: 1000000,
1185                    cpu_usage_percent: 50.0,
1186                    active_operations: 1,
1187                    queue_depth: 0,
1188                    last_success_time: None,
1189                    uptime_seconds: 3600,
1190                },
1191                performance_metrics: None,
1192            },
1193            recovery_suggestions: vec![],
1194            related_errors: vec![],
1195            timestamp: SystemTime::now()
1196                .duration_since(SystemTime::UNIX_EPOCH)
1197                .unwrap()
1198                .as_secs(),
1199            error_id: "test_error_123".to_string(),
1200            recoverable: true,
1201            retry_info: Some(RetryInfo {
1202                attempt: 0,
1203                max_attempts: 3,
1204                retry_delay: Duration::from_secs(5),
1205                backoff_strategy: BackoffStrategy::Exponential,
1206                last_retry: None,
1207                success_history: vec![],
1208            }),
1209        };
1210
1211        let result = handler.handle_error(error).await;
1212
1213        assert!(result.handled);
1214        assert_eq!(result.error_id, "test_error_123");
1215    }
1216
1217    #[test]
1218    fn test_error_severity_ordering() {
1219        assert!(ErrorSeverity::Fatal > ErrorSeverity::Critical);
1220        assert!(ErrorSeverity::Critical > ErrorSeverity::Error);
1221        assert!(ErrorSeverity::Error > ErrorSeverity::Warning);
1222        assert!(ErrorSeverity::Warning > ErrorSeverity::Info);
1223    }
1224
1225    #[test]
1226    fn test_backoff_strategy() {
1227        let retry_info = RetryInfo {
1228            attempt: 2,
1229            max_attempts: 5,
1230            retry_delay: Duration::from_secs(10),
1231            backoff_strategy: BackoffStrategy::Exponential,
1232            last_retry: None,
1233            success_history: vec![false, false],
1234        };
1235
1236        assert_eq!(retry_info.backoff_strategy, BackoffStrategy::Exponential);
1237        assert_eq!(retry_info.attempt, 2);
1238    }
1239
1240    #[test]
1241    fn test_user_impact_assessment() {
1242        let config = ErrorHandlerConfig::default();
1243        let handler = AdvancedErrorHandler::new(config);
1244
1245        let fatal_error = AdvancedError {
1246            severity: ErrorSeverity::Fatal,
1247            category: ErrorCategory::Internal,
1248            // ... other fields with default values for testing
1249            message: "Fatal error".to_string(),
1250            technical_details: "System crash".to_string(),
1251            context: ErrorContext {
1252                operation: "test".to_string(),
1253                user: None,
1254                session_id: None,
1255                request_id: None,
1256                component: "test".to_string(),
1257                function: None,
1258                location: None,
1259                parameters: HashMap::new(),
1260                system_state: SystemState {
1261                    available_memory_bytes: 0,
1262                    cpu_usage_percent: 0.0,
1263                    active_operations: 0,
1264                    queue_depth: 0,
1265                    last_success_time: None,
1266                    uptime_seconds: 0,
1267                },
1268                performance_metrics: None,
1269            },
1270            recovery_suggestions: vec![],
1271            related_errors: vec![],
1272            timestamp: 0,
1273            error_id: "test".to_string(),
1274            recoverable: false,
1275            retry_info: None,
1276        };
1277
1278        let impact = handler.assess_user_impact(&fatal_error);
1279        assert_eq!(impact, UserImpact::Severe);
1280    }
1281}
voirs_cli/error/advanced_handler.rs

voirs_cli/error/
advanced_handler.rs
