Sudoku Challenge (v2.0.0)

Project Description

A modern, full-featured Sudoku game built with Next.js 16 and React 19. Features an intelligent puzzle generator, comprehensive game controls, responsive design, and extensive testing coverage with 92.4% overall coverage.

Features

Core Gameplay

• Interactive Sudoku Grid: Responsive 9×9 grid with intuitive input handling
• 10 Difficulty Levels: From Easy (1-2) to Expert (9-10) with intelligent puzzle generation
• Real-time Timer: Track your solving time with pause/resume functionality
• Solution Validation: Instant feedback on puzzle completion

Game Controls

• Hint System: Smart hints with usage tracking and strategic suggestions
• Undo/Redo: Full move history with unlimited undo capability
• Reset Game: Generate new puzzles with cooldown protection
• Pause/Resume: Pause timer and hide grid for breaks

Technical Features

• Server-side Puzzle Generation: Advanced DLX algorithm for unique, solvable puzzles
• Intelligent Caching: API response caching with force refresh options
• Mobile-first Design: Fully responsive with touch optimization
• Comprehensive Testing: 87.5% test coverage with unit, integration, and responsive testing
• Type Safety: Full TypeScript implementation

Installation

pnpm install

Development

# Start development server
pnpm dev

# Build for production
pnpm build

# Start production server
pnpm start

Testing

Test Coverage: 92.4% (Functions: 94.3%, Branches: 94.1%, Lines: 92.4%)

# Run all tests
pnpm test

# Run with coverage report
pnpm test:coverage

# Run E2E tests
pnpm test:e2e

# Test categories
# - Component tests (40+ tests)
# - Hook tests (comprehensive state management)
# - API tests (31+ tests with caching)
# - Responsive tests (20+ tests)
# - Utility tests (comprehensive validation & error handling)
# - E2E tests (Playwright integration)

Code Quality

# Check code quality
pnpm quality

# Fix linting and formatting
pnpm quality:fix

SonarCloud Integration

This project is configured for SonarCloud Automatic Analysis for continuous code quality monitoring.

Project Structure

src/
├── app/                    # Next.js App Router
│   ├── api/solveSudoku/   # Puzzle generation API
│   ├── __tests__/         # Page component tests
│   ├── globals.css        # Global styles
│   ├── page.styles.ts     # Page-specific styles
│   └── page.tsx           # Main game page
├── components/            # React components
│   ├── __tests__/         # Component tests
│   ├── SudokuGrid.tsx     # Interactive game grid
│   ├── SudokuGrid.styles.ts # Grid component styles
│   ├── GameControls.tsx   # Game control buttons
│   ├── GameControls.styles.ts # Controls component styles
│   ├── Timer.tsx          # Game timer
│   └── DifficultySelector.tsx
├── hooks/                 # Custom React hooks
│   ├── __tests__/         # Hook tests
│   └── useGameState.ts    # Game state management
├── utils/                 # Utility functions
│   ├── __tests__/         # Utility tests
│   ├── hints.ts           # Hint generation logic
│   ├── apiCache.ts        # API caching
│   └── stats.ts           # Game statistics
├── test-utils/            # Testing utilities
└── types/                 # TypeScript definitions

API Endpoints

• POST /api/solveSudoku?difficulty=1-10 - Generate new puzzle
• POST /api/solveSudoku?difficulty=5&force=true - Force new puzzle

Dependencies

Runtime

• next (^16.0.0) - React framework with App Router
• react (^19.2.0) - UI library with React Compiler
• fast-sudoku-solver (^1.1.22) - Advanced puzzle generation
• winston (^3.18.3) - Structured logging
• lodash (^4.17.21) - Utility functions

Development

• typescript (^5.9.3) - Type safety with strict mode
• vitest (^3.2.4) - Fast testing framework
• eslint (^9.38.0) - Code linting with modern config
• prettier (^3.6.2) - Code formatting
• husky (^9.1.7) - Git hooks for quality gates
• playwright (^1.56.1) - E2E testing framework

License

MIT License - see LICENSE file for details.