webhooker/pkg/config/example_test.go

package config_test

import (
	"fmt"
	"log"
	"os"

	"sneak.berlin/go/webhooker/pkg/config"
)

func Example() {
	// Set the environment explicitly
	config.SetEnvironment("dev")

	// Get configuration values
	baseURL := config.GetString("baseURL")
	timeout := config.GetInt("timeout", 30)
	debugMode := config.GetBool("debugMode", false)

	fmt.Printf("Base URL: %s\n", baseURL)
	fmt.Printf("Timeout: %d\n", timeout)
	fmt.Printf("Debug Mode: %v\n", debugMode)

	// Get secret values
	apiKey := config.GetSecretString("api_key")
	if apiKey != "" {
		fmt.Printf("API Key: %s...\n", apiKey[:8])
	}
}

func ExampleSetEnvironment() {
	// Your application determines which environment to use
	// This could come from command line args, env vars, etc.
	environment := os.Getenv("APP_ENV")
	if environment == "" {
		environment = "development"
	}

	// Set the environment explicitly
	config.SetEnvironment(environment)

	// Now use configuration throughout your application
	fmt.Printf("Environment: %s\n", environment)
	fmt.Printf("App Name: %s\n", config.GetString("app_name"))
}

func ExampleGetString() {
	config.SetEnvironment("prod")

	// Get a string configuration value with a default
	baseURL := config.GetString("baseURL", "http://localhost:8080")
	fmt.Printf("Base URL: %s\n", baseURL)
}

func ExampleGetInt() {
	config.SetEnvironment("prod")

	// Get an integer configuration value with a default
	port := config.GetInt("port", 8080)
	fmt.Printf("Port: %d\n", port)
}

func ExampleGetBool() {
	config.SetEnvironment("dev")

	// Get a boolean configuration value with a default
	debugMode := config.GetBool("debugMode", false)
	fmt.Printf("Debug Mode: %v\n", debugMode)
}

func ExampleGetSecretString() {
	config.SetEnvironment("prod")

	// Get a secret string value
	apiKey := config.GetSecretString("api_key")
	if apiKey != "" {
		// Be careful not to log the full secret!
		fmt.Printf("API Key configured: yes\n")
	}
}

func ExampleLoadFile() {
	// Load configuration from a specific file
	if err := config.LoadFile("/path/to/config.yaml"); err != nil {
		log.Printf("Failed to load config: %v", err)
		return
	}

	config.SetEnvironment("staging")
	fmt.Printf("Loaded configuration from custom file\n")
}

func ExampleReload() {
	config.SetEnvironment("dev")

	// Get initial value
	oldValue := config.GetString("some_key")

	// ... config file might have been updated ...

	// Reload configuration from file
	if err := config.Reload(); err != nil {
		log.Printf("Failed to reload config: %v", err)
		return
	}

	// Get potentially updated value
	newValue := config.GetString("some_key")
	fmt.Printf("Value changed: %v\n", oldValue != newValue)
}

// Example config.yaml structure:
/*
environments:
  development:
    config:
      baseURL: http://localhost:8000
      debugMode: true
      port: 8000
    secrets:
      api_key: dev-key-12345

  production:
    config:
      baseURL: https://api.example.com
      debugMode: false
      port: 443
      GCPProject: my-project-123
      AWSRegion: us-west-2
    secrets:
      api_key: $GSM:prod-api-key
      db_password: $ASM:prod/db/password

configDefaults:
  app_name: My Application
  timeout: 30
  log_level: INFO
  port: 8080
*/