# Image API
This is an Actix-web server for serving images and videos from a filesystem.
Upon first run it will generate thumbnails for all images and videos at `BASE_PATH`.

## Features
- Automatic thumbnail generation for images and videos
- EXIF data extraction and storage for photos
- File watching with NFS support (polling-based)
- Video streaming with HLS
- Tag-based organization
- Memories API for browsing photos by date
- **AI-Powered Photo Insights** - Generate contextual insights from photos using LLMs
- **RAG-based Context Retrieval** - Semantic search over daily conversation summaries
- **Automatic Daily Summaries** - LLM-generated summaries of daily conversations with embeddings

## Environment
There are a handful of required environment variables to have the API run.
They should be defined where the binary is located or above it in an `.env` file.
You must have `ffmpeg` installed for streaming video and generating video thumbnails.

- `DATABASE_URL` is a path or url to a database (currently only SQLite is tested)
- `BASE_PATH` is the root from which you want to serve images and videos
- `THUMBNAILS` is a path where generated thumbnails should be stored
- `VIDEO_PATH` is a path where HLS playlists and video parts should be stored
- `BIND_URL` is the url and port to bind to (typically your own IP address)
- `SECRET_KEY` is the *hopefully* random string to sign Tokens with
- `RUST_LOG` is one of `off, error, warn, info, debug, trace`, from least to most noisy [error is default]
- `EXCLUDED_DIRS` is a comma separated list of directories to exclude from the Memories API
- `WATCH_QUICK_INTERVAL_SECONDS` (optional) is the interval in seconds for quick file scans [default: 60]
- `WATCH_FULL_INTERVAL_SECONDS` (optional) is the interval in seconds for full file scans [default: 3600]

### AI Insights Configuration (Optional)

The following environment variables configure AI-powered photo insights and daily conversation summaries:

#### Ollama Configuration
- `OLLAMA_PRIMARY_URL` - Primary Ollama server URL [default: `http://localhost:11434`]
  - Example: `http://desktop:11434` (your main/powerful server)
- `OLLAMA_FALLBACK_URL` - Fallback Ollama server URL (optional)
  - Example: `http://server:11434` (always-on backup server)
- `OLLAMA_PRIMARY_MODEL` - Model to use on primary server [default: `nemotron-3-nano:30b`]
  - Example: `nemotron-3-nano:30b`, `llama3.2:3b`, etc.
- `OLLAMA_FALLBACK_MODEL` - Model to use on fallback server (optional)
  - If not set, uses `OLLAMA_PRIMARY_MODEL` on fallback server

**Legacy Variables** (still supported):
- `OLLAMA_URL` - Used if `OLLAMA_PRIMARY_URL` not set
- `OLLAMA_MODEL` - Used if `OLLAMA_PRIMARY_MODEL` not set

#### SMS API Configuration
- `SMS_API_URL` - URL to SMS message API [default: `http://localhost:8000`]
  - Used to fetch conversation data for context in insights
- `SMS_API_TOKEN` - Authentication token for SMS API (optional)

#### Fallback Behavior
- Primary server is tried first with 5-second connection timeout
- On failure, automatically falls back to secondary server (if configured)
- Total request timeout is 120 seconds to accommodate LLM inference
- Logs indicate which server/model was used and any failover attempts

#### Daily Summary Generation
Daily conversation summaries are generated automatically on server startup. Configure in `src/main.rs`:
- Date range for summary generation
- Contacts to process
- Model version used for embeddings: `nomic-embed-text:v1.5`