# Votes Endpoints

Real-time popularity voting. Bots or integrations send votes during live gaming sessions. Votes are matched to the currently-playing game using timestamp intervals.

## Endpoint Summary

| Method | Path | Auth | Description |
|--------|------|------|-------------|
| GET | `/api/votes` | None | Paginated vote history with filtering |
| POST | `/api/votes/live` | Bearer | Submit a live vote (up/down) |

---

## GET /api/votes

Paginated vote history with filtering. Use query parameters to filter by session, game, username, or vote type.

### Authentication

None.

### Query Parameters

| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| session_id | int | No | — | Filter by session ID |
| game_id | int | No | — | Filter by game ID |
| username | string | No | — | Filter by voter username |
| vote_type | string | No | — | `"up"` or `"down"` |
| page | int | No | 1 | Page number |
| limit | int | No | 50 | Items per page (max 100) |

### Response

**200 OK**

Results are ordered by `timestamp DESC`. The `vote_type` field is returned as `"up"` or `"down"` (not raw integers).

```json
{
  "votes": [
    {
      "id": 891,
      "session_id": 5,
      "game_id": 42,
      "game_title": "Quiplash 3",
      "pack_name": "Party Pack 7",
      "username": "viewer123",
      "vote_type": "up",
      "timestamp": "2026-03-15T20:29:55.000Z",
      "created_at": "2026-03-15T20:29:56.000Z"
    }
  ],
  "pagination": {
    "page": 1,
    "limit": 50,
    "total": 237,
    "total_pages": 5
  }
}
```

### Error Responses

| Status | Body | When |
|--------|------|------|
| 400 | `{ "error": "..." }` | Invalid `session_id`, `game_id`, or `vote_type` |
| 200 | `{ "votes": [], "pagination": { "page": 1, "limit": 50, "total": 0, "total_pages": 0 } }` | No results match the filters |

---

## POST /api/votes/live

Submit a real-time up/down vote for the game currently being played. Automatically finds the active session and matches the vote to the correct game using the provided timestamp and session game intervals.

### Authentication

Bearer token required. Include in header: `Authorization: Bearer <token>`.

### Request Body

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| username | string | Yes | Identifier for the voter (used for deduplication) |
| vote | string | Yes | `"up"` or `"down"` |
| timestamp | string | Yes | ISO 8601 timestamp when the vote occurred |

```json
{
  "username": "viewer123",
  "vote": "up",
  "timestamp": "2026-03-15T20:30:00Z"
}
```

### Behavior

- Finds the active session (single session with `is_active = 1`).
- Matches the vote timestamp to the game being played at that time (uses interval between consecutive `played_at` timestamps).
- Updates game `upvotes`, `downvotes`, and `popularity_score` atomically in a transaction.
- **Deduplication:** Rejects votes from the same username within a 1-second window (409 Conflict).
- Broadcasts a `vote.received` WebSocket event to all clients subscribed to the active session. See [WebSocket Protocol](../websocket.md#votereceived) for event payload.

### Response

**200 OK**

```json
{
  "success": true,
  "message": "Vote recorded successfully",
  "session": { "id": 3, "games_played": 5 },
  "game": {
    "id": 42,
    "title": "Quiplash 3",
    "upvotes": 11,
    "downvotes": 2,
    "popularity_score": 9
  },
  "vote": {
    "username": "viewer123",
    "type": "up",
    "timestamp": "2026-03-15T20:30:00Z"
  }
}
```

### Error Responses

| Status | Body | When |
|--------|------|------|
| 400 | `{ "error": "Missing required fields: username, vote, timestamp" }` | Missing required fields |
| 400 | `{ "error": "vote must be either \"up\" or \"down\"" }` | Invalid vote value |
| 400 | `{ "error": "Invalid timestamp format. Use ISO 8601 format (e.g., 2025-11-01T20:30:00Z)" }` | Invalid timestamp |
| 404 | `{ "error": "No active session found" }` | No session with `is_active = 1` |
| 404 | `{ "error": "No games have been played in the active session yet" }` | Active session has no games |
| 404 | `{ "error": "Vote timestamp does not match any game in the active session", "debug": { "voteTimestamp": "2026-03-15T20:30:00Z", "sessionGames": [{ "title": "Quiplash 3", "played_at": "..." }] } }` | Timestamp outside any game interval |
| 409 | `{ "error": "Duplicate vote detected (within 1 second of previous vote)", "message": "Please wait at least 1 second between votes", "timeSinceLastVote": 0.5 }` | Same username voted within 1 second |
| 500 | `{ "error": "..." }` | Server error |

### Example

```bash
curl -X POST "http://localhost:5000/api/votes/live" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "username": "viewer123",
    "vote": "up",
    "timestamp": "2026-03-15T20:30:00Z"
  }'
```
