# Development Guide - Main

This document outlines the development and operational aspects of the Pig Farm Controller application.

## 1. Development Setup

### 1.1. Technology Stack

*   **Language**: Go 1.25
*   **Web Framework**: Echo v4.13.4
*   **ORM**: GORM v1.30.5
*   **Database**: PostgreSQL (TimescaleDB)
*   **Logging**: Zap v1.27.0
*   **API Documentation**: Swaggo v1.16.6

### 1.2. Prerequisites

*   Go 1.25 or higher
*   PostgreSQL (with TimescaleDB extension if used)

### 1.3. Installation

1.  **Clone the repository**:
    ```bash
    git clone git.huangwc.com/pig/pig-farm-controller.git
    cd pig-farm-controller
    ```
2.  **Download Go modules**:
    ```bash
    go mod tidy
    ```
3.  **Configure the application**:
    Copy `config.example.yml` to `config.yml` and update the necessary fields, especially `jwt_secret`, database credentials, and ChirpStack API token.
    ```bash
    cp config.example.yml config.yml
    # Edit config.yml
    ```

### 1.4. Running the Application

To run the application, you can use the `go run` command or `make run` if a Makefile target is defined.

```bash
# Using go run
go run main.go

# Using Makefile (if 'run' target exists)
make run
```

### 1.5. Testing

To run unit and integration tests:

```bash
go test ./...
```

## 2. Operational Information

### 2.1. Configuration

Application configuration is managed via `config.yml`. Key configurable parameters include:

*   `app.jwt_secret`: JWT signing key.
*   `server.port`: HTTP server listening port.
*   `database`: PostgreSQL connection details (host, port, username, password, dbname, sslmode, is_timescaledb).
*   `log`: Logging level, format, and file output settings.
*   `chirp_stack`: ChirpStack API host and token.
*   `lora_mesh`: LoRa Mesh specific configurations (UART port, baud rate, etc.).

### 2.2. Logging

Logs are configured to output to console and file (`./app_logs/app.log`) as per `config.yml`. The log level can be adjusted.

### 2.3. Deployment

No explicit Dockerfiles or CI/CD pipeline configurations were found. Deployment is expected to be handled manually or via custom scripts based on the compiled Go binary and `config.yml`.