# KMountain Flower Radio Station

A three-tier web application for a community radio station: Angular 21 frontend, FastAPI backend, PostgreSQL database.

Renders a hero page, about page, broadcast schedule, donation tiers, upcoming events, and a contact form — styled with a warm mountain/nature aesthetic.

## Quick Start

### Option A — Dev Container (recommended)

Open the repo in VS Code and click **Reopen in Container** (or run `Dev Containers: Reopen in Container` from the command palette). The dev container starts both the backend (port 8000) and frontend (port 4200) automatically.

Open [http://localhost:4200](http://localhost:4200).

### Option B — Manual (frontend + backend separately)

```bash
# Backend (uses SQLite for local dev — no database server needed)
cd backend
pip install -r requirements.txt
export KMTN_DATABASE_URL="sqlite+aiosqlite:///./kmountain.db"
uvicorn app.main:app --reload

# Frontend (new terminal)
npm install && ng serve
```

Open [http://localhost:4200](http://localhost:4200) and ensure the backend is running on [http://localhost:8000](http://localhost:8000).

## Prerequisites

| Requirement | Version | Notes |
|---|---|---|
| Node.js | 20+ | For frontend development |
| npm | 11+ | |
| Python | 3.12+ | For backend development |
| PostgreSQL | 16+ | For production only (dev uses SQLite) |

## Architecture

```
                    ┌──────────────┐
                    │    Browser   │
                    │   :4200 / :80│
                    └──────┬───────┘
                           │
              ┌────────────┴────────────┐
              │                         │
         ┌────▼─────┐            ┌──────▼─────┐
         │  Nginx   │   /api/*   │  FastAPI   │
         │ (static) │─ proxy ──▶ │  :8000     │
         └──────────┘            └──────┬─────┘
                                        │
                                 ┌──────▼─────┐
                                 │ PostgreSQL │
                                 │   :5432    │
                                 └────────────┘
```

**Three tiers:**

1. **Frontend** — Angular 21 SPA. In production, served by Nginx. In development, served by the Angular dev server on port 4200.
2. **Backend** — Python FastAPI with async SQLAlchemy. Provides CRUD REST endpoints for programs (broadcast schedule), events (upcoming events), and donation tiers. Auto-generates Swagger/OpenAPI docs at `/docs`.
3. **Database** — PostgreSQL 16. Schema contains three tables: `programs`, `events`, `donation_tiers`. Initial data is loaded via [seed.py](backend/seed.py). Local development uses SQLite for convenience.

## Project Structure

```
.
├── docker-compose.yml          # Dev compose (builds from source)
├── docker-compose.prod.yml     # Prod override (applied with -f docker-compose.yml -f docker-compose.prod.yml)
├── docker-compose.dev.yml      # Dev-sidecar compose (dev container)
├── Dockerfile                  # Frontend: Node build stage + Nginx serve stage
├── docker-entrypoint.sh        # Renders nginx config + config.json from env vars
├── nginx.conf.template         # Nginx config template (envsubst)
├── config.json.template        # Runtime API config template (envsubst)
├── .devcontainer/              # VS Code dev container
│   ├── Dockerfile              # Alpine Python 3.12 + Node.js + Angular CLI
│   └── devcontainer.json       # Dev container config
│
├── src/                        # Angular 21 frontend
│   ├── app/                    # Standalone components
│   │   ├── app.routes.ts       # Lazy-loaded route map
│   │   ├── app.config.ts       # App providers + APP_INITIALIZER (loads config.json)
│   │   ├── hero/ about/ schedule/ donate/ events/ contact/ navbar/ footer/
│   │   ├── services/           # HTTP services (program, event, tier, app-config)
│   │   └── interfaces/         # TypeScript types (Program, Event, Tier)
│   ├── environments/           # dev/prod config (apiBaseUrl)
│   └── styles/                 # SCSS design tokens
│       ├── _variables.scss     # Colors, spacing, breakpoints
│       ├── _mixins.scss        # Card, button, responsive mixins
│       └── _themes.scss        # SCSS → CSS custom properties
│
└── backend/                    # FastAPI backend
    ├── Dockerfile              # Python 3.12-slim + gunicorn/uvicorn
    ├── requirements.txt
    ├── seed.py                 # Initial data for all models
    └── app/
        ├── main.py             # FastAPI app, CORS, router registration
        ├── config.py           # ENV-based settings (KMTN_* prefix)
        ├── database.py         # async engine + session factory
        ├── models.py           # SQLAlchemy ORM (Program, Event, DonationTier)
        ├── schemas.py          # Pydantic schemas (Create/Update/Response)
        └── api/
            ├── programs.py     # CRUD /api/programs
            ├── events.py       # CRUD /api/events
            └── tiers.py        # CRUD /api/tiers
```

## Local Development

### Dev Container (recommended)

Open the repo in VS Code → **Reopen in Container**. The dev container starts both services automatically. See [.devcontainer/](.devcontainer/) for the configuration.

### Manual Development

Run both layers in parallel — development uses SQLite (no database server needed):

```bash
# 1. Backend (new terminal)
cd backend
pip install -r requirements.txt
export KMTN_DATABASE_URL="sqlite+aiosqlite:///./kmountain.db"
export KMTN_CORS_ORIGINS='["http://localhost:4200"]'
uvicorn app.main:app --reload

# 2. Frontend (another terminal)
npm install
ng serve
```

The database auto-seeds on first startup. To reset and re-seed at any time:

```bash
curl -X POST http://localhost:8000/api/admin/reset
```

## Configuration

| Variable | Default | Where | Description |
|---|---|---|---|
| Variable | Default | Where | Description |
|---|---|---|---|
| `KMTN_DATABASE_URL` | `postgresql+asyncpg://...` (prod) / `sqlite+aiosqlite:///./kmountain.db` (dev) | [backend/app/config.py](backend/app/config.py) | Database connection string |
| `KMTN_CORS_ORIGINS` | `["http://localhost:4200"]` | [backend/app/config.py](backend/app/config.py) | CORS allowlist (JSON array) |
| `KMTN_ENV` | `development` | [backend/app/config.py](backend/app/config.py) | Set to `production` to disable admin endpoints |
| `API_UPSTREAM` | `http://api:8000` | [Dockerfile](Dockerfile) | Internal API target for Nginx proxy (Docker DNS) |
| `API_PUBLIC_URL` | `""` (empty) | [Dockerfile](Dockerfile) | Browser-facing API URL. Empty = proxy mode; set to direct URL when ingress breaks proxy chain |

Environment variables are prefixed with `KMTN_` in the backend. For production, set `KMTN_DATABASE_URL` to your managed PostgreSQL connection and update `KMTN_CORS_ORIGINS` to your actual domain.

## Building

```bash
# Frontend (produces dist/radio-station/browser/)
ng build --configuration production
```

For production deployment, serve the built static files with Nginx and run the backend behind it.

## Testing

```bash
ng test              # Angular + Vitest
```

The backend API is self-documented at [http://localhost:8000/docs](http://localhost:8000/docs) (Swagger UI). The database auto-seeds on first startup — visit that URL to interactively test endpoints.

## API Reference

The backend exposes CRUD endpoints for three models:

| Method | Endpoint | Description |
|---|---|---|
| `GET` | `/api/programs` | List all programs (`?day=1..7` to filter by day of week) |
| `GET` | `/api/programs/:id` | Single program |
| `POST` | `/api/programs` | Create program |
| `PUT` | `/api/programs/:id` | Update program |
| `DELETE` | `/api/programs/:id` | Delete program |
| `GET` | `/api/events` | List events (`?active=true` to filter active events) |
| `GET` | `/api/events/:id` | Single event |
| `POST` | `/api/events` | Create event |
| `PUT` | `/api/events/:id` | Update event |
| `DELETE` | `/api/events/:id` | Delete event |
| `GET` | `/api/tiers` | List donation tiers (ordered by `display_order`) |
| `GET` | `/api/tiers/:id` | Single tier |
| `POST` | `/api/tiers` | Create tier |
| `PUT` | `/api/tiers/:id` | Update tier |
| `DELETE` | `/api/tiers/:id` | Delete tier |

Full interactive API docs at [http://localhost:8000/docs](http://localhost:8000/docs).

## Deployment

### Docker Compose (recommended)

The app ships as two Docker images — a frontend (Angular + Nginx) and a backend (FastAPI + gunicorn). Build, tag, and push them to your registry, then deploy with Docker Compose.

#### Build and push

```bash
# Frontend
docker build -t <registry>/kmtnflower:latest .
docker push <registry>/kmtnflower:latest

# Backend
docker build -t <registry>/kmtnflower-api:latest ./backend
docker push <registry>/kmtnflower-api:latest
```

#### Deploy

On the target machine, create a Docker Compose file (see [docker-compose.test.yml](docker-compose.test.yml) for a reference) that pulls the images and sets the required environment variables:

```yaml
services:
  db:
    image: docker.io/library/postgres:16-alpine
    environment:
      POSTGRES_DB: kmountain
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
    volumes:
      - pgdata:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 5s
      timeout: 5s
      retries: 5

  api:
    image: <registry>/kmtnflower-api:latest
    environment:
      KMTN_DATABASE_URL: postgresql+asyncpg://postgres:postgres@db:5432/kmountain
      KMTN_CORS_ORIGINS: '["http://yourdomain.com"]'
      KMTN_ENV: production
    depends_on:
      db:
        condition: service_healthy

  frontend:
    image: <registry>/kmtnflower:latest
    environment:
      API_UPSTREAM: http://api:8000
      API_PUBLIC_URL: ""
    ports:
      - "4200:80"
    depends_on:
      - api

volumes:
  pgdata:
```

Then start:

```bash
docker compose up -d
```

#### API\_PUBLIC\_URL

The frontend container renders a `config.json` at startup from the `API_PUBLIC_URL` environment variable. This controls how the Angular app reaches the API:

| Mode | Value | When to use |
|---|---|---|
| **Proxy** (default) | `""` (empty) | Browser calls `/api/*` relative paths; Nginx forwards to `API_UPSTREAM`. Use when no external ingress interferes. |
| **Direct** | `"http://yourhost:8000"` | Browser calls the API container directly. Use when an external ingress layer (e.g., TrueNAS middleware, Kubernetes ingress) breaks the Nginx proxy chain. Requires CORS to be configured on the backend. |

#### Example: TrueNAS Scale

For a TrueNAS Scale deployment where the built-in ingress layer may redirect traffic:

```yaml
services:
  db:
    image: docker.io/library/postgres:16-alpine
    environment:
      POSTGRES_DB: kmountain
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
    volumes:
      - pgdata:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 5s
      timeout: 5s
      retries: 5

  api:
    image: truenas.local:35000/kmtnflower-api:latest
    environment:
      KMTN_DATABASE_URL: postgresql+asyncpg://postgres:postgres@db:5432/kmountain
      KMTN_CORS_ORIGINS: '["http://truenas.local:34200", "http://truenas.local"]'
      KMTN_ENV: production
    ports:
      - "8000:8000"
    depends_on:
      db:
        condition: service_healthy

  frontend:
    image: truenas.local:35000/kmtnflower:latest
    environment:
      API_UPSTREAM: http://api:8000
      API_PUBLIC_URL: "http://truenas.local:8000"
    ports:
      - "34200:80"
    depends_on:
      - api

volumes:
  pgdata:
```

> **Note:** The database auto-seeds with initial data on first startup. To re-seed at any time (dev only): `curl -X POST http://localhost:8000/api/admin/reset`.

### Bare-metal production

For production, you'll need to set up:
- A PostgreSQL database (managed or self-hosted)
- The FastAPI backend (gunicorn/uvicorn)
- Nginx to serve the Angular build and proxy `/api/*` to the backend

```bash
# 1. Build the frontend
ng build --configuration production

# 2. Configure the backend
export KMTN_DATABASE_URL="postgresql+asyncpg://user:pass@host:5432/kmountain"
export KMTN_CORS_ORIGINS='["https://yourdomain.com"]'
export KMTN_ENV="production"

# 3. Start the backend
cd backend
pip install -r requirements.txt
uvicorn app.main:app --host 0.0.0.0 --port 8000

# 4. Serve the frontend with Nginx (or your preferred web server),
#    pointing /api/* requests to http://localhost:8000
```

The database auto-seeds on first startup.

### Production hardening checklist

- [ ] Use a managed PostgreSQL database (RDS, Cloud SQL, etc.)
- [ ] Update `KMTN_CORS_ORIGINS` to your actual domain (not `localhost`)
- [ ] Set `KMTN_ENV="production"` to disable admin endpoints
- [ ] Add a reverse proxy (Caddy, Traefik) in front of Nginx for HTTPS
- [ ] Set up log rotation
- [ ] Configure a process manager (systemd, PM2) for the backend

## Development Tools

- **Dev container** — Open the repo in VS Code → "Reopen in Container" for a pre-configured environment with Angular CLI, Node.js, Python 3, and Git ([.devcontainer/](.devcontainer/)).
- **VS Code workspace** — [workspace file](web_app.code-workspace) in the repo root configures both Angular and Python extensions.
- **Prettier** — Run `npx prettier --write .` to format the codebase.
- **Prettier config** — [**.prettierrc**](.prettierrc) (100 char width, single quotes, Angular HTML parser).

## Tech Stack

| Layer | Technology |
|---|---|
| Frontend | Angular 21 (standalone components, signals-ready) |
| Backend | FastAPI 0.115, Python 3.12 |
| Database | PostgreSQL 16 (async via SQLAlchemy 2.0) |
| Styling | SCSS with design tokens (variables → mixins → CSS custom properties) |
| Routing | Angular Router (lazy loaded) + Nginx SPA fallback |
| HTTP | RxJS observables (frontend → FastAPI) |
| Containers | Dev container (VS Code Remote - Containers) |
| CI/CD | _(not yet configured)_ |
| Testing | Vitest (via Angular CLI) |