🐛 Critical Bug Fixes

• FIXED: Error widget now properly displays when onVerify returns false
• FIXED: Custom buttonWidget now correctly triggers onVerify callback instead of bypassing verification
• FIXED: OTP fields now properly clear after failed verification attempts when clearFieldsOnError is enabled
• FIXED: Async onVerify operations are now properly handled with correct state management
• IMPROVED: Enhanced error state management to ensure proper UI feedback
• IMPROVED: Better field state handling during verification failures

🚀 Major New Features

• ADDED: Complete state management integration with external state parameters
• ADDED: Real-time field value updates - no more waiting for delete + type to see changes
• ADDED: Package-managed validation and error states with external synchronization
• ADDED: Enhanced button styling with full control over border radius, padding, and borders
• ADDED: External error text and state management for seamless Cubit/BLoC integration
• ADDED: Comprehensive state management example with live state controls

🎨 Enhanced Customization

• ADDED: buttonBorderRadius parameter for complete button styling control
• ADDED: buttonPadding and buttonBorderSide for advanced button customization
• ADDED: externalErrorText, externalErrorState, externalLoadingState for state management
• ADDED: onExternalStateChange callback for bidirectional state synchronization
• IMPROVED: Custom widgets now maintain full functionality without performance impact

🧪 Testing & Validation

• ADDED: Comprehensive bug fix test page demonstrating all critical fixes
• ADDED: State management integration example with live controls
• ADDED: Test cases for error widget display, custom button verification, field clearing, and async handling
• ADDED: Real-time state monitoring and external state control examples
• VALIDATED: All reported critical issues from v3.1.0 have been resolved

📋 Issues Resolved

• Resolves issue where error widgets were not displayed on verification failure
• Resolves issue where custom buttons completely bypassed verification logic
• Resolves issue where OTP fields retained old values after failed verification
• Resolves issue where async verification operations had incorrect state handling
• Resolves issue where field values didn't update in real-time
• Resolves issue where external state management integration was incomplete

📚 Documentation & Examples

• ADDED: Complete Cubit integration guide with step-by-step migration
• ADDED: State management best practices and integration patterns
• ADDED: Comprehensive examples showing all use cases and configurations
• ADDED: Real-time callback examples and state synchronization patterns

🗑️ Complete Removal of Deprecated Widget

• BREAKING CHANGE: Completely removed deprecated OtpVerificationWidget
• Migration Required: All users must migrate to OtpKit widget
• Cleaner API: Simplified package API by removing deprecated code
• Reduced Package Size: Smaller package size due to removed deprecated code

✅ Fixed Custom Widget Functionality

• Custom Widget Support: Fixed buttonWidget and resendWidget parameters to properly override default UI
• Complete Replacement: Custom widgets now fully replace default buttons instead of being ignored
• All Custom Widgets: Support for buttonWidget, resendWidget, timerWidget, titleWidget, and subtitleWidget
• Backward Compatibility: Existing code continues to work with default widgets when custom widgets not provided

• ✅ WASM Compatibility Fully Fixed - Completely resolved dart:io import issues with proper conditional imports
• ✅ Platform Abstraction - Created proper platform checker abstraction for WASM compatibility
• ✅ Zero WASM Issues - Package now fully compatible with WebAssembly runtime

• ✅ Logo Display Fixed - Logo now displays properly on pub.flutter-io.cn using GitHub raw URL
• ✅ Visual Consistency - All images now use consistent GitHub raw URLs for pub.flutter-io.cn compatibility

• ✅ Complete Demo Showcase - Now displaying all 6 demo GIFs in beautiful 2-row table layout
• ✅ Enhanced Documentation - Added comprehensive CONTRIBUTING.md guide for contributors
• ✅ Complete API Reference - Added detailed parameter tables for all configuration classes
• ✅ Professional Presentation - World-class documentation with Flutter-focused examples
• ✅ No HTML Code Blocks - Eliminated confusing HTML styling examples, pure Flutter code only

• ✅ WASM Compatibility Fixed - Resolved dart:io import issues for WebAssembly compatibility
• ✅ Platform Utils Added - New PlatformUtils class for cross-platform compatibility
• ✅ Conditional Imports - Proper conditional imports for web/WASM environments
• ✅ Static Analysis Improved - Fixed platform detection issues across all service files
• ✅ Fixed GIF display on pub.flutter-io.cn - Updated demo URLs to use GitHub raw links
• ✅ Improved documentation - Enhanced README with better formatting and structure
• ✅ Better demo presentation - Clean table layout for showcasing features
• ✅ Enhanced accessibility - Improved alt text and descriptions for demo images

🚀 MAJOR RELEASE: Complete Rewrite with Modern Architecture #

🔧 Animation System Overhaul (Latest Updates) #

🎯 Performance-First Defaults

• BREAKING CHANGE: All animations now disabled by default (enableAnimation: false)
• Zero Animation Overhead: Default configuration provides maximum performance
• Instant State Changes: Fields change state immediately without transitions
• Clean Static UI: Only colors change, no size/shape transformations

🐛 Critical Animation Fixes

• Fixed Scaling Bug: Filled fields no longer appear scaled when animations disabled
• Conditional Transform Logic: Transform.scale, Transform.rotate, Transform.translate only apply when animations enabled
• Proper Animation Checks: All animation effects now respect enableFieldStateAnimation setting
• No Visual Artifacts: Eliminated unwanted scaling/rotation effects in static mode

🎨 Enhanced Animation Control

• Explicit Animation Enabling: Developers must explicitly enable animations when needed
• Granular Control: Separate controls for main widget, field state, cursor, and decoration animations
• Performance Transparency: Clear documentation of performance implications
• Backward Compatibility: Existing code continues to work, but with performance improvements

🎯 New Main Widget: OtpKit

• Brand New Widget: Completely rewritten OtpKit widget from scratch
• Deprecated OtpVerificationWidget: Marked as deprecated, use OtpKit for new projects
• Unified Control: All features controllable from single main widget
• Modern Architecture: Clean separation of concerns, advanced state management
• Zero Breaking Changes: Existing OtpVerificationWidget continues to work

🔥 Smart Auth Integration (SMS Autofill)

• Complete SMS Service: OtpSmsService with platform-specific implementations
• SMS Retriever API: Android SMS Retriever API support with app signature
• SMS User Consent API: Android SMS User Consent API support
• iOS Native SMS: iOS native SMS autofill integration
• Advanced Validation: Regex-based SMS validation with custom patterns
• Error Handling: Comprehensive SMS error handling and timeout management
• Cross-Platform SMS: Full SMS autofill support across platforms

⚡ Performance Monitoring System

• Real-time Metrics: OtpPerformanceMonitor for live performance tracking
• Memory Monitoring: Memory usage tracking and optimization recommendations
• Animation Performance: FPS tracking for smooth animations
• Performance Recommendations: Automatic optimization suggestions
• Background Cleanup: Memory management with configurable cleanup intervals
• Animation Pooling: Resource optimization for better performance
• Lazy Loading: Support for large field counts with lazy loading

🔒 Biometric Integration

• Cross-Platform Biometrics: OtpBiometricService for all platforms
• iOS Face ID & Touch ID: Complete iOS biometric integration
• Android Fingerprint: Android fingerprint and face recognition support
• Biometric Events: Comprehensive event handling and callbacks
• Security Timeouts: Configurable biometric authentication timeouts
• Fallback Options: Graceful fallback when biometrics unavailable

🎬 Advanced Animation & Cursor System

• 🎯 Default: NO ANIMATIONS: All animations disabled by default for maximum performance
  • enableAnimation: false - No main widget animations (fade/scale/slide)
  • enableFieldStateAnimation: false - No field state transitions
  • enableCursorAnimation: false - No cursor blinking/animations
  • enableDecorationAnimation: false - No decoration transitions
  • Performance First: Instant state changes, zero animation overhead
• 🎨 Opt-in Animations: Explicitly enable animations when needed
  • Field Fill Animations: Scale, rotate, slide (4 directions) for field completion
  • Error Animations: Shake, bounce, rotate, pulse, wiggle, slide variations
  • Cursor Animations: Blink/opacity and focus-scale effects
  • Main Widget Animations: Fade, scale, slide transitions
• Cursor System (New!): Pluggable caret styles with animation
  • Styles: system, none, bar, block, underline, outline, doubleBar, dashedUnderline, beamCap, beamNotch, wedge, ring, strikethrough, doubleUnderline, gradientBar, glowBar
  • Centered alignment and refined placement for underline variants
  • Visibility fixes for small fields (dynamic min sizes where needed)
• Animation Configuration: Complete control over all animation parameters
  • Main-level Animation Overrides: OtpKit now exposes top-level animation overrides for fill, error, and cursor that take precedence over OtpFieldConfig
  • One Style Per Case: Exactly one animation style applies per case (fill OR error), simplifying predictability and customization
  • Conditional Animation Logic: Animations only apply when explicitly enabled

🌍 Platform-Specific Features

• iOS Optimizations: Face ID, Touch ID, iOS-specific animations, VoiceOver
• Android Optimizations: Fingerprint, SMS APIs, TalkBack support
• Web Optimizations: Keyboard handling, screen reader support, responsive design
• Desktop Optimizations: Platform-specific layouts, keyboard navigation
• Platform Service: OtpPlatformService for platform-specific features
• Haptic Feedback: Platform-appropriate haptic feedback

🛡️ Enterprise Security Features

• Rate Limiting: Configurable attempt limits per minute/hour
• Advanced Validation: Checksum validation and custom patterns
• Audit Logging: Security event tracking and monitoring
• Anti-Tampering: Security measures against tampering
• Session Management: Configurable session timeouts
• Encryption Support: Optional encryption for secure operations

📚 Comprehensive Documentation

• Complete README: Comprehensive documentation with examples
• Service Documentation: Detailed guides for all new services
• Migration Guides: Easy migration from Pinput and Smart Auth
• Troubleshooting: Common issues and solutions
• Platform Guides: Platform-specific implementation guides

🎨 Enhanced Examples

• 8 Example Tabs: Basic, Modern, Rounded, Underlined, Animated, Custom, Advanced, Cursors
• Cursors Tab: Demonstrates every caret style, including global override and "no cursor"
• Enterprise Example: Complete enterprise-level configuration showcase
• All Features Demonstrated: Every new feature showcased with examples
• Contact Info Masking: Phone and email masking examples
• Validation Examples: Success and failure scenario demonstrations

🔧 New Configuration Classes

• OtpSmsConfig: Complete SMS autofill configuration
• OtpPerformanceConfig: Performance monitoring and optimization settings
• OtpSecurityConfig: Security and biometric configuration
• Enhanced OtpAnimationConfig: Extended with cursor and decoration animations
• Enhanced OtpErrorConfig: Advanced error handling configuration

🚀 Service Architecture

• Modular Services: Independent, optional services for different features
• Zero Backend Impact: All services are optional and don't affect backend integration
• Backward Compatibility: Existing code continues to work without changes
• Gradual Adoption: Add features incrementally as needed
• Performance Optimized: Services only initialize when needed

📱 Complete Platform Support

• iOS: Face ID, Touch ID, native SMS, VoiceOver, iOS-specific optimizations
• Android: Fingerprint, SMS Retriever API, User Consent API, TalkBack
• Web: Optimized keyboard handling, screen reader support, responsive design
• Desktop: Platform-specific layouts, keyboard navigation, accessibility

🧭 Highlights

• Complete solution with timer, validation, masking, and SMS autofill
• Cross-platform support with advanced UI and customization
• Rich animation system for errors, fill, and cursor
• Enterprise-ready options (rate limiting, audit logging, biometrics)
• Real-time performance monitoring and memory optimization

🔄 Migration Guide #

• From OtpVerificationWidget: change widget name to OtpKit
• Zero breaking changes: existing code continues to work

📦 Dependencies #

• No New Dependencies: All features built with existing Flutter APIs
• Platform Channels: Uses method channels for platform-specific features
• Optional Services: Services only load when features are enabled

🚀 Complete Field Configuration Control & Platform Adaptation #

🎨 Complete Field Configuration Control

• New fieldConfig Parameter: Added complete field configuration control to OtpVerificationWidget
• Full Customization: Users can now pass a complete OtpFieldConfig object for unlimited field styling control
• Fallback System: Individual field parameters still work as fallback when fieldConfig is not provided
• Advanced Field Shapes: Complete control over field shapes including custom shapes with OtpFieldShapeConfig
• Custom Border Styles: Support for solid, dashed, dotted, bottomOnly, topOnly, leftOnly, rightOnly borders
• Complete Styling Control: Control over dimensions, colors, effects, typography, cursor, shadows, and animations

🎯 Field Configuration Features

• Field Dimensions: Complete control over fieldWidth, fieldHeight, borderRadius, borderWidth
• Field Shapes: Support for rectangle, roundedRectangle, circle, stadium, underlined, outlined, custom
• Custom Shapes: OtpFieldShapeConfig with OtpBorderStyle for unlimited border customization
• Colors: Full control over primaryColor, backgroundColor, shadowColor, cursorColor
• Effects: Control over enableShadow, focusEffect, completedEffect, focusGlowRadius, focusGlowIntensity
• Typography: Control over fieldFontSize, fieldFontWeight, letterSpacing
• Cursor: Control over cursorColor, cursorWidth

📱 Platform Adaptation & Compatibility

• Cross-Platform Support: Optimized for iOS, Android, Web, Desktop, and macOS
• Platform-Specific Optimizations: Enhanced performance and behavior for each platform
• Responsive Design: Automatic adaptation to different screen sizes and orientations
• Platform-Specific Styling: Optimized styling for each platform's design guidelines
• Accessibility: Enhanced accessibility support across all platforms
• Performance: Optimized rendering and state management for all platforms

🎨 Advanced Field Styling Examples

• Dashed Borders: Custom dashed borders with configurable dash patterns
• Gradient Effects: Support for gradient backgrounds and effects
• Shadow Effects: Customizable shadows with color, blur, spread, and offset control
• Focus Effects: Glow effects, color transitions, and focus animations
• Completed Effects: Fill and border effects for completed fields
• Custom Decorations: Complete control over field decorations and appearance

📚 Comprehensive Documentation

• Complete API Reference: Comprehensive documentation of all parameters and methods
• Field Configuration Guide: Detailed guide for using fieldConfig parameter
• Platform Adaptation Guide: Guide for platform-specific optimizations
• Advanced Examples: Multiple examples showing different field configurations
• Best Practices: Best practices for field styling and platform adaptation
• Migration Guide: Guide for upgrading from previous versions

🔧 Enhanced Public API

• Field Configuration Methods: New methods for managing field configurations
• Platform Detection: Methods for detecting and adapting to different platforms
• Style Management: Enhanced style management with platform-specific optimizations
• Configuration Validation: Automatic validation of field configurations
• Error Handling: Improved error handling for invalid configurations

🎯 Usage Examples

• Basic Field Configuration: Simple field styling with individual parameters
• Advanced Field Configuration: Complete field styling with fieldConfig parameter
• Custom Field Shapes: Examples of custom field shapes and border styles
• Platform-Specific Styling: Examples optimized for different platforms
• Responsive Design: Examples showing responsive behavior across devices

🧪 Testing & Quality Assurance

• Cross-Platform Testing: Comprehensive testing across all supported platforms
• Performance Testing: Performance optimization and testing for all platforms
• Accessibility Testing: Accessibility testing and improvements
• UI Testing: Comprehensive UI testing across different screen sizes and orientations
• Integration Testing: Testing integration with different Flutter versions and dependencies

🐛 Bug Fixes & Improvements

• Field Configuration Fixes: Fixed issues with field configuration parameter handling
• Platform-Specific Fixes: Fixed platform-specific issues and optimizations
• Performance Improvements: Enhanced performance across all platforms
• Memory Management: Improved memory management and resource cleanup
• State Management: Enhanced state management and synchronization

📱 Platform-Specific Enhancements

• iOS: Enhanced iOS-specific optimizations and styling
• Android: Enhanced Android-specific optimizations and Material Design compliance
• Web: Enhanced web-specific optimizations and responsive behavior
• Desktop: Enhanced desktop-specific optimizations and keyboard navigation
• macOS: Enhanced macOS-specific optimizations and styling

🐛 Bug Fixes #

🔧 Documentation & README Updates

• Enhanced Package Logo: Increased logo size from 200px to 300px in README for better visibility
• Improved README Header: Added subtitle "Flutter OTP Kit - Professional OTP Verification Package" below logo
• Better Visual Presentation: Enhanced package branding and visual appeal in documentation

📚 Minor Documentation Improvements

• README Enhancement: Improved logo presentation and package description
• Visual Consistency: Better alignment and spacing in README header section
• Professional Appearance: Enhanced overall package presentation on pub.flutter-io.cn

🌍 RTL/LTR Support & Directionality #

🔄 Complete Directionality Support

• Automatic Direction Detection: Package automatically detects text direction based on app locale
• Manual Direction Override: Option to manually specify textDirection (RTL/LTR)
• RTL Language Support: Full support for Arabic, Hebrew, Persian, Urdu, and other RTL languages
• Seamless Integration: RTL functionality works identically to LTR with proper text flow
• Locale-Based Detection: Supports 10+ RTL languages with automatic detection

🎨 RTL Visual Design

• Proper Text Flow: Text flows correctly from right-to-left in RTL mode
• Field Arrangement: OTP fields arrange properly in RTL layout
• Button Positioning: Verify and resend buttons position correctly for RTL
• Icon Alignment: All icons and visual elements align properly in RTL
• Arabic Validation Messages: Beautiful Arabic validation messages with proper styling

🎯 Tap Outside Unfocus & Focus Management #

📱 Global Tap Outside Functionality

• Built-in Tap Outside: Package handles tap outside unfocus automatically
• Global Coverage: Tap anywhere on screen to unfocus fields (not just within widget)
• External Handler Priority: External handlers take priority over built-in functionality
• Configurable Behavior: unfocusOnTapOutside parameter to enable/disable
• External Handler Support: externalTapOutsideHandler for custom tap outside logic

⚡ Real-time Focus Synchronization

• Zero Delay Transitions: Focus state updates with zero delay
• Cursor-Border Sync: Cursor position always matches focused field border
• Immediate Visual Feedback: Focus borders appear instantly when fields are focused
• Smooth Transitions: Smooth focus transitions between fields
• Accurate Focus State: Focus state accurately reflects actual cursor position

🔧 Validation State Isolation & Improvements #

🎯 Complete State Isolation

• Validation vs Error Separation: Complete isolation between validation and error states
• Independent State Management: Validation and error states managed independently
• Persistent Validation Borders: Validation borders reappear correctly on subsequent triggers
• Smart State Clearing: Validation states clear appropriately on user input
• Mutual Exclusivity: Validation and error states are mutually exclusive

🔄 Enhanced Validation Logic

• Real-time Border Updates: Validation borders update in real-time
• Proper State Hierarchy: Correct visual hierarchy: Error > Focused > Completed > Filled > Empty
• Instant Error Clearing: Validation errors clear immediately when user types
• State Refresh: Proper state refresh when validation is triggered
• Focus Listener Setup: Enhanced focus listeners for immediate state updates

🐛 Critical Bug Fixes #

🔧 Focus State Management

• Fixed Focus Mismatch: Cursor position now always matches focused field border
• Eliminated Delays: Removed delays in focus transitions
• Immediate Updates: Focus state updates immediately when fields change
• Proper Listener Setup: Enhanced focus listener setup for real-time updates

🎯 Validation State Fixes

• Fixed Border Persistence: Validation borders now persist and reappear correctly
• State Isolation: Complete isolation between validation and error states
• Proper Clearing: Validation states clear appropriately on user interaction
• Real-time Updates: All state updates happen in real-time

📱 Tap Outside Fixes

• Global Coverage: Tap outside now works globally across the entire screen
• External Handler Priority: External handlers properly take priority over built-in functionality
• Layout Exception Fix: Fixed RenderBox layout exceptions in tap outside implementation
• Gesture Detection: Proper gesture detection with HitTestBehavior.translucent

🧹 Code Quality & Maintenance #

🧽 Cleanup & Optimization

• Removed Debug Statements: Removed all print() and log() statements from package
• Code Cleanup: Cleaned up unused variables and methods
• Performance Optimization: Optimized focus listener setup and state updates
• Memory Management: Improved memory management in state updates

📚 Documentation Updates

• Updated README: Comprehensive documentation of new features
• RTL Examples: Added RTL/LTR usage examples
• Tap Outside Examples: Added tap outside functionality examples
• API Reference: Updated API reference with new parameters
• Package Logo: Added official package logo to README

🎨 Visual Improvements #

🖼️ Package Branding

• Official Logo: Added flutter_otp_kit_logo.png as package logo
• README Enhancement: Updated README with package logo and branding
• Visual Consistency: Consistent visual design across documentation

🎯 Enhanced Examples

• RTL Example: Complete Arabic RTL example with proper styling
• Auto Direction Example: Automatic direction detection example
• Tap Outside Test: Interactive tap outside functionality test
• External Handler Test: External tap outside handler example

🚀 Complete Backend Integration & Real-time State Management (Current Version) #

🔥 Backend Integration Ready

• Cubit/Bloc Integration: Perfect integration with Cubit/Bloc patterns
• Automatic State Management: Package handles all error/validation states automatically
• handleVerificationResult(): New method for automatic success/error handling
• handleBackendState(): Comprehensive backend state management method
• Minimal User Responsibility: Package handles maximum possible states internally

⚡ Real-time State Callbacks

• onTimerChanged: Real-time timer state changes for custom widgets
• onErrorStateChangedCallback: Real-time error state changes for custom widgets
• onValidationStateChanged: Real-time validation state changes for custom widgets
• onCompletionStateChanged: Real-time completion state changes for custom widgets
• Instant Custom Widget Updates: Custom widgets update immediately when states change

🎯 Enhanced Public API

• triggerResend(): Public method to trigger resend functionality programmatically
• remainingResendTime: Getter for current remaining resend time
• canResend: Getter to check if resend is currently available
• Comprehensive Error Clearing: All error states clear automatically on user input
• Smart State Synchronization: Custom widgets stay perfectly synchronized with package

🎨 Complete Widget Customization

• Optional Text Parameters: All text parameters now optional with sensible defaults
• Widget-based Everything: Complete widget-based customization for all UI elements
• Custom Validation Messages: Widget-based validation messages with animations
• Immediate Custom Resend: Custom resend widgets update instantly with package timer
• Perfect State Sync: Custom widgets automatically sync with package internal states

🧠 Intelligent State Management

• Mutual Exclusivity: Error and validation states are mutually exclusive
• Automatic Clearing: All error states clear comprehensively on any user input
• Smart Validation: Default validation message widget when auto-validation enabled
• Backend Ready: Perfect for any backend architecture (REST, GraphQL, etc.)
• State Callbacks: Real-time notifications for all state changes

🎯 Latest Validation & Error Handling Enhancements #

✅ Smart Validation System

• Incomplete Field Prevention: Verify button now prevents submission with missing fields when enableAutoValidation: true
• User-Friendly Messages: Shows "Please enter all digits" (or custom message) when fields are incomplete
• Validation Message Display: Fixed validation messages not appearing when verify pressed with incomplete OTP
• Custom Validation Messages: Support for custom validation messages via validationMessage parameter

🔄 Instant Error Clearing

• Immediate Error Clearing: Validation errors and red borders clear instantly when user starts typing
• Smart Error State Management: Error text clears automatically on any user input (typing or deleting)
• Field State Updates: All field states update properly when errors are cleared
• Smooth UX: No more persistent validation errors - they disappear as soon as user interacts

🧪 Enhanced Test Button Functionality

• Functional Test Buttons: All test buttons now actually control the OTP widget state
• GlobalKey Integration: Added GlobalKeys to access OtpVerificationWidget state programmatically
• Smart Button Detection: Test buttons automatically work with currently selected example (basic or widget-based)
• Complete Control: Set errors, clear errors, clear all fields, and fill test OTP programmatically

⏰ Resend Timer Improvements

• Working Timer Countdown: Fixed resend timer to show proper countdown "Resend in 00:59", "00:58", etc.
• Default Timer Functionality: Removed custom resend widget to enable default timer with countdown
• Timer State Management: Timer properly resets and shows countdown in widget-based example

🐛 Critical Bug Fixes

• Validation Logic: Fixed verify button logic to check OTP completion before form validation
• Error Text Clearing: Added proper error text clearing in onDigitChanged method
• Method Availability: Verified all required methods exist (setErrorState, clearErrorState, clearOtp, setOtp)
• State Synchronization: Fixed field state updates when validation errors are cleared

📚 Documentation Updates

• README Enhancement: Added comprehensive validation and error handling documentation
• Usage Examples: Updated examples to show validation features and best practices
• API Documentation: Enhanced documentation for validation parameters and methods

🎯 Complete Validation Flow #

1. Enter partial OTP (e.g., "455_") → Press "Verify" → Shows "Please enter all digits" + red borders
2. Start typing in any field → Error message + red borders disappear immediately
3. Complete the OTP → Press "Verify" → Works normally
4. Test buttons work perfectly → Set Error, Clear Error, Clear All, Fill Test all functional
5. Resend timer works → Shows countdown and functions properly when timer expires

🎨 Complete Visual Hierarchy & State Management Overhaul #

🎯 Perfect Visual State Management

• Comprehensive Visual Hierarchy: Implemented strict visual hierarchy: Error > Focused > Completed > Filled > Empty
• Generic Color System: All colors (including error colors) are completely generic and customizable
• Smooth State Transitions: Enhanced smooth transitions between all field states with Curves.easeInOut
• Focus State Precision: Fixed focus state management to show focused border only on actually focused fields
• Error State Clearing: Aggressive error clearing on any user input (typing or deleting) for immediate feedback
• Field Deletion Handling: Proper handling of field deletion with correct state transitions and focus management

🔧 Enhanced Input Handling & Validation

• Consecutive Digit Support: Fixed issue preventing consecutive identical digits (e.g., "2244" now works)
• Clipboard Paste Enhancement: Robust paste functionality with debounce mechanism and intelligent full OTP vs single-digit handling
• Input Validation: Enhanced validation using OtpValidator.isValidOtp for paste operations
• Focus Management: Improved focus handling with WidgetsBinding.instance.addPostFrameCallback for proper timing

⏰ Timer & Resend Improvements

• Automatic Timer Start: Timer now starts automatically on widget initialization
• Timer Reset on Resend: Timer properly resets to full duration every time resend is triggered
• Consistent Timer Behavior: Fixed timer behavior to work consistently across all scenarios

🎨 Widget-Based Customization Revolution

• Complete Widget-Based Example: Transformed example into fully widget-based OTP screen with:
  • Custom gradient containers with shadows and borders
  • Multiple icons throughout the interface (security, phone, verified user, message, clock, keyboard, info)
  • Rich text with styled phone number display
  • Custom header with gradient icon containers
  • Enhanced subtitle with icons and rich text
  • Custom OTP fields container with keyboard icon
  • Informative footer with help text
• Responsive Design: Fixed pixel overflow issues with Flexible widgets and proper text wrapping
• Visual Polish: Added gradients, shadows, rounded corners, and professional styling throughout

🐛 Critical Bug Fixes

• RenderBox Layout Error: Fixed RenderBox was not laid out error by simplifying nested Column structure
• Pixel Overflow Issues: Resolved all "RIGHT OVERFLOWED" warnings with responsive layout design
• State Synchronization: Fixed timing issues with WidgetsBinding.instance.addPostFrameCallback
• Focus State Accuracy: Ensured focus borders only appear on actually focused fields
• Error State Persistence: Fixed error state not clearing properly on field deletion

🧩 Architecture Improvements

• State Manager Enhancements: Added debugPrint statements (wrapped in kDebugMode) for better debugging
• Style Manager Refactoring: Enhanced getFieldColors with strict visual hierarchy implementation
• Field State Logic: Improved updateFieldState to correctly determine field error states
• Animation Smoothing: Changed all animation curves to Curves.easeInOut for smoother transitions

🏗️ Complete Architecture Refactoring #

🧩 Widget-Based Architecture

• Modular Design: Completely refactored into a widget-based architecture for better maintainability
• Separation of Concerns: Clear separation between UI widgets, state management, and styling
• Reusable Widgets: Created reusable widgets that can be used independently
• Improved Testability: Widgets designed for better testability
• Reduced Complexity: Main widget reduced from 1800+ lines to manageable, focused widgets

🧠 Enhanced State Management

• Dedicated State Manager: Extracted state management into a dedicated OtpStateManager class
• Centralized State Logic: All state transitions and management handled in one place
• Cleaner State Transitions: More predictable and manageable state transitions
• Improved Error Handling: Better error state management with clear responsibilities

🎨 Improved Styling System

• Style Manager: Dedicated OtpStyleManager for handling all styling logic
• Consistent Theming: More consistent application of themes and styles
• Field Colors: Extracted FieldColors class for better color management
• Dynamic Styling: Improved dynamic styling based on field states

⚙️ Configuration System

• Modular Configuration: Split configuration into logical modules
• Field Configuration: Dedicated OtpFieldConfig for field appearance
• Error Configuration: Dedicated OtpErrorConfig for error handling
• Animation Configuration: Dedicated OtpAnimationConfig for animations

🛠️ Utility Functions

• OTP Masking: Extracted OtpMasker for contact information masking
• OTP Validation: Extracted OtpValidator for input validation
• OTP Formatting: Extracted OtpFormatter for input formatting

📱 UI Widgets

• OTP Field: Extracted individual field widget
• OTP Fields Row: Container for OTP fields
• OTP Header: Title and subtitle widget
• OTP Footer: Verify button, resend, and timer widget
• OTP Error Display: Error message widget

📚 Documentation & Examples

• Updated README: Comprehensive documentation of the new architecture
• Architecture Section: Added dedicated section explaining the widget architecture
• Screenshots & Demo: Added section for screenshots and video demonstration
• Example App: Updated with an "Architecture Demo" showing widget usage
• Code Comments: Improved code documentation

🧪 Other Improvements

• Reduced Code Duplication: Eliminated redundant code through proper abstraction
• Better Type Safety: Improved type definitions and null safety
• Performance Optimizations: More efficient rendering and state updates
• Accessibility Improvements: Better semantic labeling and screen reader support

🔧 Enhanced Public API & Flexible Methods #

🎯 Enhanced Public Methods

• clearOtp(): Now supports configurable options for refocus, error clearing, and callbacks
• setOtp(): Now supports configurable options for focus clearing, error handling, and callbacks
• resetFields(): Now supports preserving focus and error state
• isOtpValid(): New method to check if OTP is valid (complete and passes validation)

🔥 Improved Error State Management

• Enhanced Error Priority System: Comprehensive error state priority handling based on configuration
• Flexible Error Clearing: More control over when and how error states are cleared
• Error Persistence Options: Better configuration for error state persistence
• Error State Transitions: Smoother transitions between error states

🌟 Focus Management Improvements

• Preserved Focus Option: Option to preserve focus when resetting fields
• Focus Transitions: Better focus handling during field clearing and deletion
• Focus State Management: More consistent focus state across all operations
• Edge Case Handling: Better handling of focus edge cases

🎨 Field State Improvements

• Priority-Based Field States: Enhanced field state priority system
• State Transitions: Smoother transitions between field states
• Empty Field Handling: Better handling of empty fields
• Deletion Behavior: Improved behavior when deleting field values

📱 User Experience Enhancements

• Flexible API: More flexibility in how methods are called
• Configurable Behavior: More control over widget behavior
• Consistent States: More consistent state management
• Predictable Behavior: More predictable behavior in all scenarios

📚 Example Updates

• Enhanced Edge Cases Demo: Updated with new method options
• Interactive Testing: More comprehensive testing options
• Method Options: Demonstrations of all method options
• State Management: Better visualization of state management

🚨 Critical Bug Fixes & Professional Error State Management #

🐛 Field Styling Priority Fixes

• Fixed Completed Fields Override: Fixed issue where completed fields would override error styling
• Proper Priority Order: Implemented correct priority order: Error > Focused > Completed > Filled > Empty
• Empty Field Styling: Fixed inconsistent styling for empty fields with proper default border color
• Border Color Transitions: Smoother transitions between border colors during state changes

🔄 Enhanced Error State Management

• Error State Persistence: Fixed issues with error state not persisting when needed
• Error State Clearing: Improved error state clearing logic to be less aggressive
• Error State Priority: Fixed issues with error state priority not being respected
• Error State Feedback: Better visual feedback for error states

🔧 Field Clearing & Deletion Fixes

• Proper Field Clearing: Fixed issues with field clearing not properly resetting field states
• Deletion Focus Handling: Improved focus handling during character deletion
• Empty Field Styling: Fixed styling inconsistencies for empty fields after deletion
• Border Color Transitions: Smoother transitions between border colors during deletion

🧪 Edge Case Handling

• Empty Input: Better handling of empty input
• Partial Input: Improved handling of partial input
• Deletion Edge Cases: Fixed edge cases with deletion at field boundaries
• Focus Edge Cases: Better handling of focus edge cases

🎨 Widget-Based Customization #

🖼️ Custom Widgets

• Custom Title: Added titleWidget parameter for custom title widget
• Custom Subtitle: Added subtitleWidget parameter for custom subtitle widget
• Custom Error: Added errorWidget parameter for custom error message widget
• Custom Button: Added verifyButtonWidget parameter for custom verify button
• Custom Resend: Added resendWidget parameter for custom resend widget
• Custom Timer: Added timerWidget parameter for custom timer widget

🔄 Backward Compatibility

• String Fallbacks: All widget parameters have string fallbacks for backward compatibility
• Graceful Degradation: Widget falls back to string-based rendering when custom widgets are not provided
• Consistent Styling: Consistent styling between string-based and widget-based customization
• Seamless Integration: Custom widgets integrate seamlessly with the rest of the widget

🚀 Automatic Error State Management & Widget-Based Customization #

🔥 Automatic Error State Management

• External Error Control: Added hasError parameter to control error state externally
• Error State Callback: Added onErrorStateChanged callback for error state changes
• Auto-Clear Options: Added autoClearErrorOnInput and autoClearErrorOnResend parameters
• Timed Error States: Added errorStateDuration for auto-clearing error states after a delay
• Dynamic Styling: Fields now dynamically update styling based on error state
• Error Persistence: Error state can persist until explicitly cleared or auto-cleared

🎨 Widget-Based Customization

• Custom Title: Added titleWidget parameter for custom title widget
• Custom Subtitle: Added subtitleWidget parameter for custom subtitle widget
• Custom Error: Added errorWidget parameter for custom error message widget
• Custom Button: Added verifyButtonWidget parameter for custom verify button
• Custom Resend: Added resendWidget parameter for custom resend widget
• Custom Timer: Added timerWidget parameter for custom timer widget
• Backward Compatibility: All widget parameters have string fallbacks for backward compatibility

🔧 Enhanced API

• getCurrentOtp(): Added method to get the current OTP value
• Error State Access: Added hasErrorState getter for checking current error state
• Error State Control: Added setErrorState() and clearErrorState() methods
• Improved Validation: Enhanced validation system with more options

📱 User Experience Improvements

• Better Error Feedback: Improved visual feedback for error states
• Smoother Transitions: Enhanced transitions between states
• More Customization: Greater flexibility for UI customization
• Accessibility Improvements: Better screen reader support

📚 Documentation & Examples

• Updated README: Comprehensive documentation of new features
• Error State Examples: Added examples for error state management
• Widget Customization Examples: Added examples for widget-based customization
• API Reference: Updated API reference with new methods and parameters

🐛 Bug Fixes & Minor Improvements #

🔧 Bug Fixes

• Focus Handling: Fixed issue with focus not properly moving to next field on input
• Empty Field Styling: Fixed inconsistent styling for empty fields
• Validation Timing: Fixed validation timing issues with auto-validation
• Timer Reset: Fixed timer not properly resetting on resend

✨ Improvements

• Performance Optimization: Reduced unnecessary rebuilds
• Memory Usage: Improved memory management
• Accessibility: Enhanced screen reader support
• Documentation: Improved code documentation and examples

🚀 Enhanced Styling & Animations #

🎨 Styling Enhancements

• Progressive Highlighting: Added option to highlight fields as they are completed
• Custom Field Shapes: Added support for different field shapes
• Gradient Support: Added support for gradient backgrounds
• Shadow Effects: Enhanced shadow customization options

🎬 Animation Improvements

• Field-to-Field Animations: Added animations when moving between fields
• State Transition Animations: Smoother transitions between field states
• Customizable Animation Curves: Added support for custom animation curves
• Animation Speed Control: Added parameters to control animation speed

🔧 Other Improvements

• Better Focus Management: Improved focus handling across fields
• Enhanced Validation: More validation options and better error handling
• Accessibility Enhancements: Better screen reader support and keyboard navigation
• Documentation: Updated documentation with new features and examples

🚀 Responsive Layout & Advanced Customization #

📱 Responsive Layout

• Adaptive Field Sizing: Fields now adapt to available width
• Layout Types: Added different layout types (fixed, responsive, wrap)
• Overflow Protection: Better handling of overflow scenarios
• Cross-Platform Optimization: Improved layout on different platforms

🎨 Advanced Customization

• Custom Field Styling: More options for field appearance
• Button Customization: Enhanced button styling options
• Typography Control: Better control over text styles
• Theme Integration: Improved integration with app themes

🔧 Other Improvements

• Performance Optimization: Reduced rebuild frequency
• Memory Management: Better resource cleanup
• Accessibility: Enhanced accessibility features
• Documentation: Comprehensive documentation update

🚀 Enhanced Functionality & Customization #

🔧 New Features

• Multiple Input Types: Added support for numeric, alphabetic, and alphanumeric input
• Custom Validation: Added support for custom validation rules
• Auto-Submit: Option to automatically submit when OTP is complete
• Paste Support: Added clipboard paste detection

🎨 Customization Options

• Color Customization: More options for customizing colors
• Dimension Control: Better control over field dimensions
• Spacing Options: Customizable spacing between elements
• Typography: Enhanced text styling options

📱 User Experience

• Focus Management: Improved focus handling
• Error Handling: Better error state management
• Feedback: Enhanced visual feedback
• Accessibility: Improved screen reader support

🚀 Initial Release #

🔧 Core Features

• OTP Input: Basic OTP input functionality
• Verification: OTP verification with callback
• Resend: Resend functionality with timer
• Validation: Basic input validation

🎨 Customization

• Colors: Basic color customization
• Dimensions: Field size and spacing customization
• Text: Customizable text elements
• Styling: Basic styling options

📱 User Experience

• Focus Management: Automatic focus movement
• Error States: Basic error state handling
• Animation: Simple animations
• Accessibility: Basic accessibility support