PriceUpdaterAppv2/.kiro/specs/windows-compatible-tui/requirements.md

Requirements Document

Introduction

This document outlines the requirements for replacing the existing Blessed-based Terminal User Interface (TUI) with a Windows-compatible alternative. The current TUI implementation using the Blessed library has compatibility issues on Windows systems, requiring a migration to a more robust, cross-platform TUI library that provides better Windows support while maintaining all existing functionality and user experience expectations.

Requirements

Requirement 1

User Story: As a Windows user, I want a TUI that works reliably on my system, so that I can use the interactive interface without compatibility issues.

Acceptance Criteria

1. WHEN the TUI is launched on Windows THEN the system SHALL display correctly without rendering artifacts
2. WHEN using Windows Terminal or Command Prompt THEN the system SHALL handle keyboard input properly
3. WHEN the interface renders THEN the system SHALL display Unicode characters and colors correctly on Windows
4. WHEN resizing the terminal window THEN the system SHALL adapt the layout appropriately
5. WHEN using different Windows terminal emulators THEN the system SHALL maintain consistent behavior

Requirement 2

User Story: As a developer, I want to replace Blessed with a better cross-platform TUI library, so that the application works consistently across all operating systems.

Acceptance Criteria

1. WHEN selecting a replacement library THEN the system SHALL prioritize Windows compatibility
2. WHEN the new library is integrated THEN the system SHALL maintain feature parity with the Blessed implementation
3. WHEN the library is chosen THEN the system SHALL have active maintenance and good documentation
4. WHEN implementing the replacement THEN the system SHALL support modern terminal features
5. WHEN the migration is complete THEN the system SHALL remove all Blessed dependencies

Requirement 3

User Story: As a user, I want the same TUI functionality after the library replacement, so that my workflow remains unchanged.

Acceptance Criteria

1. WHEN the new TUI loads THEN the system SHALL display the same main menu structure
2. WHEN navigating the interface THEN the system SHALL support the same keyboard shortcuts
3. WHEN configuring settings THEN the system SHALL provide the same configuration options
4. WHEN running operations THEN the system SHALL show the same progress indicators
5. WHEN viewing logs THEN the system SHALL display the same information format

Requirement 4

User Story: As a user, I want improved performance and responsiveness in the new TUI, so that the interface feels more fluid and responsive.

Acceptance Criteria

1. WHEN the TUI starts THEN the system SHALL load faster than the Blessed version
2. WHEN updating progress displays THEN the system SHALL render smoothly without flickering
3. WHEN handling large amounts of log data THEN the system SHALL maintain responsive scrolling
4. WHEN switching between screens THEN the system SHALL transition quickly
5. WHEN processing user input THEN the system SHALL respond immediately

Requirement 5

User Story: As a developer, I want the new TUI implementation to follow modern JavaScript patterns, so that the code is maintainable and extensible.

Acceptance Criteria

1. WHEN implementing components THEN the system SHALL use ES6+ features and modern patterns
2. WHEN structuring the code THEN the system SHALL follow the existing project architecture
3. WHEN handling state THEN the system SHALL use clear state management patterns
4. WHEN implementing event handling THEN the system SHALL use consistent event patterns
5. WHEN writing tests THEN the system SHALL provide good test coverage for TUI components

Requirement 6

User Story: As a user, I want enhanced visual feedback and better error handling in the new TUI, so that I have a clearer understanding of system status.

Acceptance Criteria

1. WHEN errors occur THEN the system SHALL display more informative error messages
2. WHEN operations are running THEN the system SHALL provide clearer progress visualization
3. WHEN configuration is invalid THEN the system SHALL highlight specific issues
4. WHEN API calls fail THEN the system SHALL show detailed connection status
5. WHEN the system is busy THEN the system SHALL provide appropriate loading indicators

Requirement 7

User Story: As a developer, I want the migration to preserve all existing service integrations, so that business logic remains unchanged.

Acceptance Criteria

1. WHEN the new TUI is implemented THEN the system SHALL reuse existing ShopifyService without changes
2. WHEN operations run THEN the system SHALL use existing ProductService and ProgressService
3. WHEN configuration is managed THEN the system SHALL use existing environment configuration
4. WHEN logs are generated THEN the system SHALL maintain compatibility with existing log formats
5. WHEN the migration is complete THEN the system SHALL pass all existing integration tests

Requirement 8

User Story: As a user, I want better accessibility features in the new TUI, so that the interface is more inclusive and easier to use.

Acceptance Criteria

1. WHEN using screen readers THEN the system SHALL provide appropriate text descriptions
2. WHEN using high contrast mode THEN the system SHALL adapt color schemes appropriately
3. WHEN using keyboard-only navigation THEN the system SHALL provide clear focus indicators
4. WHEN text is displayed THEN the system SHALL support different font sizes and terminal settings
5. WHEN colors are used THEN the system SHALL ensure sufficient contrast ratios

Requirement 9

User Story: As a developer, I want comprehensive documentation for the new TUI library choice, so that future maintenance is straightforward.

Acceptance Criteria

1. WHEN the library is selected THEN the system SHALL document the selection rationale
2. WHEN implementation patterns are established THEN the system SHALL document coding conventions
3. WHEN components are created THEN the system SHALL include inline documentation
4. WHEN the migration is complete THEN the system SHALL update all relevant README files
5. WHEN troubleshooting guides are needed THEN the system SHALL provide Windows-specific guidance

Requirement 10

User Story: As a user, I want the new TUI to handle terminal resizing and different screen sizes better, so that I can use it on various display configurations.

Acceptance Criteria

1. WHEN the terminal is resized THEN the system SHALL automatically adjust layout proportions
2. WHEN using small terminal windows THEN the system SHALL provide appropriate scrolling
3. WHEN using large displays THEN the system SHALL utilize available space effectively
4. WHEN switching between portrait and landscape orientations THEN the system SHALL adapt accordingly
5. WHEN minimum size requirements aren't met THEN the system SHALL display helpful guidance

Requirement 11

User Story: As a developer, I want a smooth migration path from Blessed to the new library, so that the transition minimizes disruption.

Acceptance Criteria

1. WHEN planning the migration THEN the system SHALL identify all Blessed-specific code
2. WHEN implementing replacements THEN the system SHALL maintain API compatibility where possible
3. WHEN testing the migration THEN the system SHALL verify functionality on multiple Windows versions
4. WHEN deploying the changes THEN the system SHALL provide fallback options if issues arise
5. WHEN the migration is complete THEN the system SHALL clean up all legacy Blessed code

Requirement 12

User Story: As a user, I want the new TUI to support modern terminal features, so that I can take advantage of enhanced terminal capabilities.

Acceptance Criteria

1. WHEN using modern terminals THEN the system SHALL support true color (24-bit) display
2. WHEN terminals support it THEN the system SHALL use enhanced Unicode characters
3. WHEN available THEN the system SHALL support mouse interaction for navigation
4. WHEN terminals provide it THEN the system SHALL use improved cursor positioning
5. WHEN modern features are unavailable THEN the system SHALL gracefully degrade functionality