adds claude.md

CLAUDE.md

@@ -0,0 +1,139 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+This is **Poker Analytics**, a comprehensive Android application for tracking and analyzing poker sessions. The app supports both cash games and tournaments, providing detailed statistics, reporting, and data visualization capabilities.
+
+### Key Features
+- Session tracking (cash games and tournaments)
+- Advanced filtering and reporting
+- Bankroll management
+- Hand history import and replay
+- Statistical analysis and charting
+- Data backup and export functionality
+- Multi-currency support
+
+## Development Commands
+
+### Building the Project
+```bash
+./gradlew assembleStandardRelease  # Build release APK
+./gradlew assembleStandardDebug    # Build debug APK
+./gradlew build                    # Build all variants
+```
+
+### Running Tests
+```bash
+./gradlew test                     # Run unit tests
+./gradlew connectedAndroidTest     # Run instrumented tests (requires device/emulator)
+./gradlew testStandardDebugUnitTest # Run specific unit tests
+```
+
+### Cleaning
+```bash
+./gradlew clean                    # Clean build artifacts
+```
+
+### Build Configuration
+- **Target SDK**: 35 (Android 15)
+- **Min SDK**: 23 (Android 6.0)
+- **Build Tools**: 30.0.3
+- **Kotlin Version**: 1.9.24
+- **Realm Schema Version**: 14
+
+## Architecture Overview
+
+### Package Structure
+The main source code is organized under `app/src/main/java/net/pokeranalytics/android/`:
+
+#### Core Components
+- **`model/`** - Data models and business logic
+  - `realm/` - Realm database models (Session, Bankroll, Result, etc.)
+  - `filter/` - Query system for filtering sessions
+  - `migrations/` - Database migration handling
+  - `handhistory/` - Hand history data structures
+
+- **`ui/`** - User interface components
+  - `activity/` - Main activities (HomeActivity, SessionActivity, etc.)
+  - `fragment/` - UI fragments organized by feature
+  - `adapter/` - RecyclerView adapters and data sources
+  - `modules/` - Feature-specific UI modules
+
+- **`calculus/`** - Statistics and calculation engine
+  - Core calculation logic for poker statistics
+  - Report generation system
+  - Performance tracking
+
+- **`util/`** - Utility classes
+  - `csv/` - CSV import/export functionality
+  - `billing/` - In-app purchase handling
+  - `extensions/` - Kotlin extension functions
+
+#### Key Classes
+- **`Session`** (`model/realm/Session.kt`): Core session data model
+- **`HomeActivity`** (`ui/activity/HomeActivity.kt`): Main app entry point with tab navigation
+- **`PokerAnalyticsApplication`**: Application class handling initialization
+
+### Database Architecture
+The app uses **Realm** database with these key entities:
+- `Session` - Individual poker sessions
+- `Bankroll` - Bankroll management
+- `Result` - Session results and statistics
+- `ComputableResult` - Pre-computed statistics for performance
+- `Filter` - Saved filter configurations
+- `HandHistory` - Hand-by-hand game data
+
+### UI Architecture
+- **MVVM pattern** with Android Architecture Components
+- **Fragment-based navigation** with bottom navigation tabs
+- **Custom RecyclerView adapters** for data presentation
+- **Material Design** components
+
+## Key Technologies
+
+### Core Dependencies
+- **Realm Database** (10.15.1) - Local data storage
+- **Kotlin Coroutines** - Asynchronous programming
+- **Firebase Crashlytics** - Crash reporting and analytics
+- **Material Design Components** - UI framework
+- **MPAndroidChart** - Data visualization
+- **CameraX** - Image capture functionality
+
+### Testing
+- **JUnit** for unit testing
+- **Android Instrumented Tests** for integration testing
+- Test files located in `app/src/androidTest/` and `app/src/test/`
+
+## Development Guidelines
+
+### Working with Sessions
+- Sessions are the core data model representing individual poker games
+- Use `Session.newInstance()` to create new sessions properly
+- Always call `computeStats()` after modifying session data
+- Sessions can be in various states: PENDING, STARTED, PAUSED, ENDED
+
+### Database Operations
+- Use Realm transactions for data modifications
+- The app uses schema version 14 - increment when making schema changes
+- Migration logic is in `PokerAnalyticsMigration.kt`
+
+### Testing Data
+- Use `FakeDataManager.createFakeSessions()` for generating test data
+- Seed data is available through the `Seed` class
+
+### Build Variants
+- **standard** - Main production flavor
+- Release builds are optimized and obfuscated with ProGuard
+
+## Performance Considerations
+- Sessions use `ComputableResult` for pre-computed statistics
+- Large datasets are handled with Realm's lazy loading
+- Chart rendering is optimized for large data sets
+- Background processing uses Kotlin Coroutines
+
+## Security & Privacy
+- Sensitive data is encrypted in Realm database
+- Crash logging excludes personal information
+- Backup functionality includes data encryption