# User Profile Endpoints Documentation

This document describes the user profile API endpoints implemented for the Beach Litter Mapping Platform.

## Overview

The user profile endpoints provide functionality for:
- Retrieving user profiles with statistics
- Updating user profile information
- Managing notification preferences
- Fetching user's reports and events
- Calculating impact scores

## Authentication

Most endpoints require authentication via Clerk session token:
```
Authorization: Bearer <clerk_session_token>
```

## Endpoints

### 1. Get User Profile

**Endpoint:** `GET /api/users/:id`

**Description:** Retrieve a user's profile including statistics about their contributions.

**Authentication:** Not required (public profiles)

**Parameters:**
- `id` (path) - User database ID

**Response:**
```json
{
  "id": "uuid",
  "clerkId": "user_xxx",
  "email": "user@example.com",
  "username": "johndoe",
  "firstName": "John",
  "lastName": "Doe",
  "avatarUrl": "https://...",
  "impactScore": 150,
  "notificationEmail": true,
  "notificationInApp": true,
  "areasOfInterest": [
    {
      "lat": 53.3498,
      "lng": -6.2603,
      "radius": 10
    }
  ],
  "createdAt": "2024-01-01T00:00:00.000Z",
  "updatedAt": "2024-01-01T00:00:00.000Z",
  "stats": {
    "reportsSubmitted": 5,
    "eventsAttended": 3,
    "eventsOrganized": 1
  }
}
```

**Error Responses:**
- `404` - User not found
- `500` - Internal server error

---

### 2. Update User Profile

**Endpoint:** `PATCH /api/users/:id`

**Description:** Update user profile information (first name, last name, username).

**Authentication:** Required (users can only update their own profile)

**Parameters:**
- `id` (path) - User database ID

**Request Body:**
```json
{
  "firstName": "John",
  "lastName": "Doe",
  "username": "johndoe123"
}
```

All fields are optional. Only provided fields will be updated.

**Response:**
```json
{
  "id": "uuid",
  "clerkId": "user_xxx",
  "email": "user@example.com",
  "username": "johndoe123",
  "firstName": "John",
  "lastName": "Doe",
  "avatarUrl": "https://...",
  "impactScore": 150,
  "createdAt": "2024-01-01T00:00:00.000Z",
  "updatedAt": "2024-01-01T00:00:00.000Z"
}
```

**Error Responses:**
- `400` - Username already taken
- `401` - Not authenticated
- `403` - Cannot update another user's profile
- `404` - User not found
- `500` - Internal server error

---

### 3. Get User Reports

**Endpoint:** `GET /api/users/:id/reports`

**Description:** Retrieve all reports submitted by a user.

**Authentication:** Not required

**Parameters:**
- `id` (path) - User database ID

**Response:**
```json
[
  {
    "id": "uuid",
    "userId": "uuid",
    "latitude": 53.3498,
    "longitude": -6.2603,
    "locationSource": "gps",
    "photoUrls": ["/uploads/photo1.jpg"],
    "photoTimestamp": "2024-01-01T12:00:00.000Z",
    "litterType": "plastic",
    "quantity": "moderate",
    "description": "Plastic bottles on beach",
    "verificationStatus": "verified",
    "createdAt": "2024-01-01T12:00:00.000Z",
    "environmentalConcerns": [],
    "verifications": []
  }
]
```

**Error Responses:**
- `500` - Internal server error

---

### 4. Get User Events

**Endpoint:** `GET /api/users/:id/events`

**Description:** Retrieve events the user has registered for and organized.

**Authentication:** Not required

**Parameters:**
- `id` (path) - User database ID

**Response:**
```json
{
  "registered": [
    {
      "id": "uuid",
      "title": "Beach Cleanup",
      "description": "Community cleanup event",
      "latitude": 53.3498,
      "longitude": -6.2603,
      "locationName": "Sandymount Beach",
      "scheduledDate": "2024-02-01T10:00:00.000Z",
      "duration": 120,
      "status": "upcoming",
      "participantCount": 15,
      "organizer": {
        "id": "uuid",
        "username": "organizer",
        "avatarUrl": "https://..."
      },
      "registeredAt": "2024-01-15T10:00:00.000Z",
      "attended": false
    }
  ],
  "organized": [
    {
      "id": "uuid",
      "title": "My Beach Cleanup",
      "description": "Event I organized",
      "latitude": 53.3498,
      "longitude": -6.2603,
      "locationName": "Dollymount Beach",
      "scheduledDate": "2024-03-01T10:00:00.000Z",
      "duration": 180,
      "status": "upcoming",
      "participantCount": 20,
      "organizer": {
        "id": "uuid",
        "username": "johndoe",
        "avatarUrl": "https://..."
      },
      "registrations": []
    }
  ]
}
```

**Error Responses:**
- `500` - Internal server error

---

### 5. Update Notification Preferences

**Endpoint:** `PATCH /api/users/:id/preferences`

**Description:** Update user's notification preferences and areas of interest.

**Authentication:** Required (users can only update their own preferences)

**Parameters:**
- `id` (path) - User database ID

**Request Body:**
```json
{
  "notificationEmail": true,
  "notificationInApp": true,
  "areasOfInterest": [
    {
      "lat": 53.3498,
      "lng": -6.2603,
      "radius": 10
    },
    {
      "lat": 51.8985,
      "lng": -8.4756,
      "radius": 25
    }
  ]
}
```

**Field Validation:**
- `radius` must be between 1 and 50 kilometers
- Each area must have `lat`, `lng`, and `radius`

**Response:**
```json
{
  "id": "uuid",
  "notificationEmail": true,
  "notificationInApp": true,
  "areasOfInterest": [
    {
      "lat": 53.3498,
      "lng": -6.2603,
      "radius": 10
    }
  ]
}
```

**Error Responses:**
- `400` - Validation error (invalid radius, missing fields, etc.)
- `401` - Not authenticated
- `403` - Cannot update another user's preferences
- `404` - User not found
- `500` - Internal server error

---

### 6. Calculate Impact Score

**Endpoint:** `POST /api/users/:id/calculate-impact`

**Description:** Calculate and update the user's impact score based on their contributions.

**Authentication:** Not required

**Parameters:**
- `id` (path) - User database ID

**Impact Score Formula:**
```
Impact Score = (reports × 10) + (events attended × 20) + (events organized × 50)
```

**Response:**
```json
{
  "impactScore": 150
}
```

**Error Responses:**
- `404` - User not found
- `500` - Internal server error

---

## Usage Examples

### Get User Profile
```bash
curl http://localhost:3005/api/users/abc-123
```

### Update Profile
```bash
curl -X PATCH http://localhost:3005/api/users/abc-123 \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{
    "firstName": "John",
    "lastName": "Doe",
    "username": "johndoe"
  }'
```

### Update Notification Preferences
```bash
curl -X PATCH http://localhost:3005/api/users/abc-123/preferences \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{
    "notificationEmail": true,
    "notificationInApp": true,
    "areasOfInterest": [
      {
        "lat": 53.3498,
        "lng": -6.2603,
        "radius": 10
      }
    ]
  }'
```

### Calculate Impact Score
```bash
curl -X POST http://localhost:3005/api/users/abc-123/calculate-impact
```

## Frontend Integration

The frontend service (`src/services/userService.ts`) provides TypeScript methods for all endpoints:

```typescript
import { userService } from '@/services/userService';

// Get profile
const profile = await userService.getProfile(userId);

// Update profile
const updated = await userService.updateProfile(userId, {
  firstName: 'John',
  lastName: 'Doe',
  username: 'johndoe'
});

// Get user's reports
const reports = await userService.getUserReports(userId);

// Get user's events
const events = await userService.getUserEvents(userId);

// Update notification preferences
const preferences = await userService.updateNotificationPreferences(userId, {
  notificationEmail: true,
  notificationInApp: true,
  areasOfInterest: [
    { lat: 53.3498, lng: -6.2603, radius: 10 }
  ]
});

// Calculate impact score
const { impactScore } = await userService.calculateImpactScore(userId);
```

## Requirements Satisfied

This implementation satisfies the following requirements from the specification:

- **Requirement 6.3**: User profile display showing submitted reports and events attended
- **Requirement 6.4**: Impact score calculation based on contributions
- **Requirement 6.5**: User profile showing map of submitted report locations (data provided via reports endpoint)
- **Requirement 10.4**: Notification preferences with area of interest configuration (1-50km radius)

## Notes

- User authentication is handled by Clerk
- Users are automatically created in the database when they first interact with the API
- The `areasOfInterest` field is stored as JSON in the database
- Impact scores are calculated on-demand but can be cached for performance
- All endpoints follow RESTful conventions
- Error responses follow a consistent format with error codes and timestamps