package envkit

import (
	"os"
	"strconv"
)

// String returns the environment variable key, or fallback if unset/empty.
// Same semantics as the getenv() helper every cmd/server/main.go in the
// monolith defined locally — hoisted here once since every microservice
// now needs it.
func String(key, fallback string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return fallback
}

// Int parses the environment variable key as an integer, or returns
// fallback if unset or unparseable.
func Int(key string, fallback int) int {
	v := os.Getenv(key)
	if v == "" {
		return fallback
	}
	n, err := strconv.Atoi(v)
	if err != nil {
		return fallback
	}
	return n
}

// Float parses the environment variable key as a float64, or returns
// fallback if unset or unparseable.
func Float(key string, fallback float64) float64 {
	v := os.Getenv(key)
	if v == "" {
		return fallback
	}
	f, err := strconv.ParseFloat(v, 64)
	if err != nil {
		return fallback
	}
	return f
}

// Bool parses the environment variable key as a bool ("true"/"1"/"yes",
// case-insensitive, or their opposites), or returns fallback if unset
// or unparseable.
func Bool(key string, fallback bool) bool {
	v := os.Getenv(key)
	if v == "" {
		return fallback
	}
	b, err := strconv.ParseBool(v)
	if err != nil {
		return fallback
	}
	return b
}