# Lendair iOS App

## Overview
SwiftUI iOS app with modular feature architecture following MVVM pattern.

## Architecture

### MVVM Pattern
- **View**: `Views/` - SwiftUI views for all feature screens
- **ViewModel**: `ViewModels/` - State management and business logic
- **Service**: `Services/` - Data layer with API communication
- **Model**: `Models/` - Data structures and type definitions

### File Structure
```
Lendair/
├── Models/
│   ├── Notification.swift          # NotificationItem, NotificationType, API response types
│   ├── TrainingPlan.swift          # TrainingPlan, PlanType, WorkoutSession, PlanProgress
│   ├── Race.swift                  # Race, RaceType, RaceFilter, API response types
│   ├── FamilyPlan.swift            # FamilyPlan, FamilyMember, LeaderboardMetric
│   ├── BeginnerMode.swift          # BeginnerConfig, Milestone, OnboardingStep
│   └── CommunityEvent.swift        # CommunityEvent, EventType, RSVPStatus
├── Services/
│   ├── NotificationService.swift   # NotificationsServiceProtocol + implementation
│   ├── TrainingPlanService.swift   # TrainingPlanServiceProtocol + implementation
│   ├── RaceService.swift           # RaceServiceProtocol + implementation
│   ├── FamilyPlanService.swift     # FamilyPlanServiceProtocol + implementation
│   ├── BeginnerModeService.swift   # BeginnerModeServiceProtocol + implementation
│   └── CommunityEventService.swift # CommunityEventServiceProtocol + implementation
├── ViewModels/
│   ├── NotificationsViewModel.swift
│   ├── TrainingPlanViewModel.swift
│   ├── RaceDiscoveryViewModel.swift
│   ├── FamilyPlanViewModel.swift
│   ├── BeginnerModeViewModel.swift
│   └── CommunityEventViewModel.swift
├── Views/
│   ├── NotificationsView.swift
│   ├── NotificationRowView.swift
│   ├── TrainingPlanView.swift
│   ├── TrainingPlanDetailView.swift
│   ├── WorkoutSessionView.swift
│   ├── RaceDiscoveryView.swift
│   ├── RaceDetailView.swift
│   ├── FamilyPlanView.swift
│   ├── FamilyMemberView.swift
│   ├── BeginnerModeView.swift
│   ├── CommunityEventsView.swift
│   └── CommunityEventDetailView.swift
└── README.md
```

## Features

### Notifications
- Notification list with pull-to-refresh
- Mark-as-read (individual and bulk)
- Type-specific icons and color coding
- Empty state handling

### AI Training Plans (Phase 3 - Premium)
- Personalized training plan generation (5K, 10K, Half/Full Marathon, Custom)
- Difficulty levels: Beginner, Intermediate, Advanced, Elite
- Weekly/daily workout scheduling with progressive overload
- Plan progress tracking with session completion
- Workout session execution with metrics display
- Plan following/unfollowing

### Race Discovery (Phase 3 - Premium)
- Browse upcoming races by location, distance, type, terrain
- Race detail pages with registration links
- Save/bookmark races
- Filter by race type (Road, Trail, Track, Virtual)
- Calendar integration ready

### Family Plans (Phase 3 - Premium)
- Multi-member household management (up to 6 members)
- Invite members via email
- Individual progress tracking per member
- Family leaderboard (distance, workouts, streak)
- Subscription status management

### Beginner Mode (Phase 3 - Premium)
- Guided onboarding with step tracking
- Progressive levels: Just Started → Getting Comfortable → Building Consistency → Progressing
- Milestone achievements and tracking
- Contextual tips and educational content
- Simplified metric display

### Community Events (Phase 3 - Premium)
- Event discovery and creation
- RSVP system (Going, Maybe, Not Going)
- Event types: Group Run, Race, Workshop, Social, Charity, Training Camp
- Participant tracking
- Upcoming/ongoing/past event categorization

## Service Pattern

All services follow the same architecture:
- **Protocol**: `Sendable` protocol for testability
- **Implementation**: Configurable `baseURL`, `URLSession`, `authToken`
- **Error Handling**: Typed error enums with `LocalizedError` conformance
- **HTTP Methods**: GET, POST, PATCH, DELETE via shared helpers

## API Endpoints

### Notifications
| Method | Endpoint | Description |
|--------|----------|-------------|
| GET | `/api/notifications?limit=&offset=` | List notifications |
| PATCH | `/api/notifications/:id/read` | Mark single as read |
| PATCH | `/api/notifications/read-all` | Mark all as read |

### Training Plans
| Method | Endpoint | Description |
|--------|----------|-------------|
| GET | `/api/training-plans?type=&difficulty=` | List plans |
| GET | `/api/training-plans/:id` | Get plan detail |
| POST | `/api/training-plans/generate` | Generate AI plan |
| POST | `/api/training-plans/:id/follow` | Follow plan |
| DELETE | `/api/training-plans/:id/follow` | Unfollow plan |
| PATCH | `/api/training-plans/sessions/:id/status` | Update session status |

### Races
| Method | Endpoint | Description |
|--------|----------|-------------|
| GET | `/api/races?type=&terrain=&...` | List races with filters |
| GET | `/api/races/:id` | Get race detail |
| POST/DELETE | `/api/races/:id/save` | Save/unsave race |
| POST | `/api/races/:id/register` | Register for race |

### Family Plans
| Method | Endpoint | Description |
|--------|----------|-------------|
| GET | `/api/family-plan` | Get family plan |
| POST | `/api/family-plan/invite` | Invite member |
| DELETE | `/api/family-plan/members/:id` | Remove member |
| GET | `/api/family-plan/leaderboard?metric=` | Get leaderboard |

### Beginner Mode
| Method | Endpoint | Description |
|--------|----------|-------------|
| GET | `/api/beginner-mode/config` | Get config |
| PATCH | `/api/beginner-mode/config` | Update config |
| GET | `/api/beginner-mode/milestones` | Get milestone progress |

### Community Events
| Method | Endpoint | Description |
|--------|----------|-------------|
| GET | `/api/events?type=&rsvp=&...` | List events with filters |
| GET | `/api/events/:id` | Get event detail |
| POST | `/api/events` | Create event |
| PATCH | `/api/events/:id` | Update event |
| POST | `/api/events/:id/rsvp` | RSVP to event |

## Testing

Tests are in `LendairTests/`:
- Uses mock services conforming to feature protocols
- ViewModel tests cover fetch, update, error handling, and computed properties
- Model tests cover enum cases, display values, and equality

## Usage

```swift
// Feature views can be integrated into your navigation stack
NavigationStack {
    TrainingPlanView()
}

NavigationStack {
    RaceDiscoveryView()
}

NavigationStack {
    CommunityEventsView()
}
```

## Premium Features

All Phase 3 features (Training Plans, Race Discovery, Family Plans, Beginner Mode, Community Events) require a Pro subscription ($9.99/mo). Subscription status should be verified via the existing SubscriptionService before feature access.