// Package globals provides build-time variables and application-wide constants.
package globals

import (
	"sync"

	"go.uber.org/fx"
)

// Package-level variables set from main via ldflags.
// These are intentionally global to allow build-time injection using -ldflags.
//
//nolint:gochecknoglobals // Required for ldflags injection at build time
var (
	mu        sync.RWMutex
	appname   string
	version   string
	buildarch string
)

// Globals holds build-time variables for dependency injection.
type Globals struct {
	Appname   string
	Version   string
	Buildarch string
}

// New creates a new Globals instance from package-level variables.
func New(_ fx.Lifecycle) (*Globals, error) {
	mu.RLock()
	defer mu.RUnlock()

	return &Globals{
		Appname:   appname,
		Version:   version,
		Buildarch: buildarch,
	}, nil
}

// SetAppname sets the application name (used for testing and main initialization).
func SetAppname(name string) {
	mu.Lock()
	defer mu.Unlock()

	appname = name
}

// SetVersion sets the version (used for testing and main initialization).
func SetVersion(ver string) {
	mu.Lock()
	defer mu.Unlock()

	version = ver
}

// SetBuildarch sets the build architecture (used for testing and main init).
func SetBuildarch(arch string) {
	mu.Lock()
	defer mu.Unlock()

	buildarch = arch
}