# Art Gallery — setup and operations

## Prerequisites

- **Node.js** 20+
- **PostgreSQL** reachable from the app host
- Network access to Wikipedia / Wikimedia (for biographies, seeding, and on-demand image fetch)

## Environment

Copy the example file and fill in credentials:

```bash
cp .env.example .env
```

| Variable | Description |
|----------|-------------|
| `DB_HOST` | PostgreSQL host |
| `DB_PORT` | Port (default `5432`) |
| `DB_USER` | Database user |
| `DB_PASSWORD` | Database password |
| `DB_NAME` | Database name (`Gallery`) |
| `PORT` | API listen port (default `3001`) |
| `IMAGE_DIR` | Root for cached images (default `./data/images`) |

Optional script tuning:

| Variable | Used by | Description |
|----------|---------|-------------|
| `MIN_PAINTINGS` | `expand-catalog` | Minimum paintings per artist (default `6`) |
| `FETCH_MAX_WAIT_SEC` | `fetch-images` | Max seconds per painting in batch runs (default `10`) |

`.env` is git-ignored; never commit passwords.

## Install

```bash
npm install
cd client && npm install && cd ..
```

## Database bootstrap

One-shot setup (migrate + seed):

```bash
npm run setup
```

Or step by step:

```bash
npm run migrate    # apply db/schema.sql
npm run seed       # eras, movements, artists, paintings, influences
```

If migration fails with permission errors, grant schema rights to the app user first (see [DB_structure.md](DB_structure.md)).

### Recommended post-seed steps

After a fresh seed, run these to match a fully populated local install:

```bash
npm run fetch-artist-bios          # bio_short / bio_full from Wikipedia
npm run expand-catalog             # famous works for artists below MIN_PAINTINGS
npm run update-influences          # painting influence graph for detail view + hall exits
npm run fetch-images -- --limit=50                # random sample; 10s max per painting (default)
npm run fetch-images -- --limit=50 --max-wait=120 # same batch size, longer lookup per work
cd client && npm run build && cd ..
```

Image fetch can take hours if you run it for the entire catalog. The first line of each run reports **`Missing local files: N`**. Use **`npm run fetch-images -- --limit=N`** for random batches (10s per painting by default), **`--artist="…"`** for one artist in catalog order, or on-demand resolution when viewing a painting in the detail view.

## Run

| Command | Purpose |
|---------|---------|
| `npm run server` | API + static SPA on `PORT` |
| `npm run dev:server` | API with nodemon reload |
| `npm run dev:client` | Vite dev server on :5173 |
| `npm run dev` | Alias for `server` |

**Production frontend:** build the client, then start the server:

```bash
cd client && npm run build && cd ..
npm run server
```

Open http://localhost:3001 (or your configured `PORT`).

## Maintenance scripts

| Command | Script | Purpose |
|---------|--------|---------|
| `npm run seed` | `scripts/seed-wikipedia.js` | Reload curated Wikipedia data |
| `npm run fetch-artist-bios` | `scripts/fetch-artist-bios.js` | Wikipedia lead sections → `bio_short` / `bio_full` |
| `npm run fetch-artist-bios -- --force` | ↑ | Refresh bios even when already set |
| `npm run expand-catalog` | `scripts/expand-paintings.js` | Insert famous works from `famous-paintings-data.js` |
| `npm run expand-catalog -- --fetch-images` | ↑ | Also download images for new rows (slow) |
| `npm run fetch-images` | `scripts/fetch-missing-images.js` | Search Wikipedia, Commons, museums for missing files |
| `npm run search-missing-paintings` | ↑ (alias) | Same as `fetch-images` |
| `npm run fetch-images -- --artist="Name"` | ↑ | Limit to one artist (catalog order) |
| `npm run fetch-images -- --limit=50` | ↑ | Random sample of N missing paintings |
| `npm run fetch-images -- --limit=250` | ↑ | Larger random batch (processes min(N, missing count)) |
| `npm run fetch-images -- --limit=50 --max-wait=120` | ↑ | Random batch; 120s cap per painting |
| `npm run fetch-images -- --discover-only --limit=20` | ↑ | Fix `wikipedia_title` via search only |
| `npm run regenerate-thumbnails` | `scripts/regenerate-thumbnails.js` | Rebuild all thumbs from full local files |
| `npm run audit-painting-images` | `scripts/audit-painting-images.js` | List thumb/full aspect-ratio mismatches |
| `npm run migrate:thumbnails` | `db/migrate-thumbnails.sql` | Add thumbnail columns |
| `npm run fetch-artist-images` | `scripts/fetch-artist-images.js` | Backfill portrait files *(if present)* |
| `npm run sync-image-paths` | `scripts/sync-image-paths.js` | Align DB paths with disk *(if present)* |
| `npm run update-influences` | `scripts/update-influences.js` | Insert influence edges from `art-influences-data.js` |
| `npm run update-influences -- --fetch-images` | ↑ | Also download images for newly created works |

### Scripts in the repository

These are checked in and maintained:

- `image-fetcher.js` — Wikimedia / museum image resolution
- `fetch-artist-bios.js` — artist biographies
- `expand-paintings.js` + `famous-paintings-data.js` — catalog expansion
- `update-influences.js` + `art-influences-data.js` — painting influence graph
- `fetch-missing-images.js` — batch image backfill
- `regenerate-thumbnails.js`, `audit-painting-images.js`

These are referenced in `package.json` but may need to be restored from git history if missing locally: `seed-wikipedia.js`, `fetch-artist-images.js`, `sync-image-paths.js`.

See [data-and-images.md](data-and-images.md) for pipeline details and override maps.

## Remote repository

Gitea: [Danilka/Art-gallery](https://gitea.mysuperlab.netcraze.pro/Danilka/Art-gallery)

```bash
git clone https://gitea.mysuperlab.netcraze.pro/Danilka/Art-gallery.git
```

After clone: copy `.env.example` → `.env`, install dependencies, run `npm run setup` against your Postgres instance, then the post-seed steps above.

## Troubleshooting

| Symptom | Likely cause | Fix |
|---------|--------------|-----|
| Empty timeline | DB not seeded | `npm run seed` |
| 500 on all `/api/*` | Wrong `.env` or Postgres down | Check connection, logs |
| “Biographical information not yet available” | Bios not fetched | `npm run fetch-artist-bios` |
| Artist hall has only 1–2 paintings | Catalog not expanded | `npm run expand-catalog`; extend `famous-paintings-data.js` |
| Black frames / canvas covers in 3D gallery | No local image for painting | `npm run fetch-images -- --limit=50` or `--artist="…"`; then `POST …/preload-images` |
| Many `⏱ timeout` lines in fetch batch | Default 10s cap too short for hard works | `--max-wait=120` or raise `FETCH_MAX_WAIT_SEC` |
| White/grey flicker on frames | Texture loading or z-fighting with wall | Rebuild client (`cd client && npm run build`); ensure latest `VirtualGallery.tsx` |
| Wrong painting in 3D gallery frame | Stale or mismatched thumbnail file | `npm run regenerate-thumbnails`; gallery prefers full `image_path` |
| Wrong painting image (fetch) | Bad museum / search match on first download | Add entry to `DIRECT_IMAGE_OVERRIDES` in `scripts/image-fetcher.js`, re-fetch file |
| Empty exit navigation lists | No `painting_influences` edges for artist | `npm run update-influences` |
| Empty *Influenced By* / *Influenced* on painting detail | No edges for that work | `npm run update-influences`; extend `art-influences-data.js` |
| No golden lamps above frames in 3D hall | Stale API process or no influence edges | Restart server after API changes; run `npm run update-influences` |
| Default Vite page instead of gallery | `client/dist` missing or stale | `cd client && npm run build` |
| Permission denied creating tables | `gallery` user lacks CREATE | Run admin grants, then migrate |
| Wikipedia API rate limit during fetch | Too many requests in a row | Wait and re-run; scripts retry with backoff |