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# Elixir & Solid.js Bridge Architecture

This project uses a hybrid architecture where **Phoenix LiveView** manages the server-side state and **Solid.js** handles the reactive client-side UI via a "Bridge Hook".

## 1. Core Architecture
- **State Source of Truth**: `socket.assigns` in Elixir LiveViews.
- **Transport**: JSON payloads via `push_event/3` (Server -> Client) and `pushEvent` (Client -> Server).
- **Client Container**: A `div` with `phx-update="ignore"`, a unique `id`, and `phx-hook="SolidBridge"`.
- **Reactivity**: A Phoenix Hook initializes a **Solid.js Store**. Server events trigger `setState` on the store, which drives Solid's fine-grained reactivity.

## 2. Frontend Build Pipeline
- **Bundler**: Custom `esbuild` script ([build.js](file:///c:/Users/TimothyCardoza/Documents/AI-Apps/RiverConnect/Rivertalk/river_connect/assets/build.js)).
- **Runtime**: `bun` is used for dependency management and running the build script.
- **JSX Support**: Solid.js JSX is compiled via `esbuild-plugin-solid`.
- **Dependency Paths**: 
    - Phoenix dependencies (js) are loaded from `package.json` (npm versions).
    - Aliases: `phoenix-colocated` is shimmed to `js/phoenix-colocated-shim.js` to prevent dynamic require errors.

## 3. Directory Structure & Key Files
- `lib/river_connect_web/live/`: Elixir LiveView components.
- `assets/js/hooks/SolidBridge.jsx`: The Phoenix Hook that spawns Solid.
- `assets/js/components/`: Solid.js reactive components (`.jsx`).
- `priv/static/assets/js/app.js`: Generated bundle (Target for `esbuild`).

## 4. State Syncing Patterns
### Server to Client (Push)
```elixir
# lib/app_live.ex
def handle_event("update", _params, socket) do
  new_state = %{count: 1}
  {:noreply, push_event(socket, "sync_state", new_state)}
end
```

### Client to Server (Push)
```javascript
// assets/js/components/MyComponent.jsx
const update = () => props.push("client_event", { data: "payload" });
```

## 5. UI Components & Styling
- **Styling**: Tailwind CSS + DaisyUI.
- **Headless UI**: [Kobalte](https://kobalte.dev/) is used for complex UI logic (Popovers, Tooltips, Tabs) while maintaining total style control.
- **Glassmorphism**: Use `.glass` helper in CSS for translucent, blurred backgrounds.

## 6. Development Workflow
- **Watchers**: Run automatically via `mix phx.server` (Configured in `config/dev.exs` using `bun`).
- **Manual Build**: `bun run --prefix assets build`.
- **Adding Dependencies**: Use `bun add` in the `assets/` directory.

## 7. Important Constraints
- **NEVER** use `phx-update="replace"` on Solid.js root containers; it will destroy the Solid DOM tree.
- **ALWAYS** use `phx-update="ignore"` for Solid mounts.
- **JSX in JS**: The build script is configured to treat `.js` files as JSX, but preferred extension for Solid components is `.jsx`.