// Package serviceboot provides shared service bootstrap helpers.
package serviceboot

import (
	"fmt"

	"github.com/gofiber/fiber/v3"

	"knowfoolery/backend/shared/infra/utils/envutil"
)

// Config defines basic service runtime settings.
type Config struct {
	AppName     string
	ServiceSlug string
	PortEnv     string
	DefaultPort int
}

// NewFiberApp creates a Fiber app with shared defaults.
func NewFiberApp(cfg Config) *fiber.App {
	return fiber.New(fiber.Config{
		AppName: cfg.AppName,
	})
}

// RegisterHealth registers a standard health endpoint.
func RegisterHealth(app *fiber.App, serviceSlug string) {
	app.Get("/health", func(c fiber.Ctx) error {
		return c.JSON(fiber.Map{
			"status":  "healthy",
			"service": serviceSlug,
		})
	})
}

// ListenAddress resolves the listen port from environment with fallback.
func ListenAddress(portEnv string, defaultPort int) string {
	port := envutil.Int(portEnv, defaultPort)
	if port < 1 || port > 65535 {
		port = defaultPort
	}
	if port < 1 || port > 65535 {
		port = 8080
	}
	return fmt.Sprintf(":%d", port)
}

// Run starts the Fiber app.
func Run(app *fiber.App, addr string) error {
	return app.Listen(addr)
}