// Package env provides functionality.
package env

import (
	"log"
	"os"
	"path/filepath"

	"github.com/joho/godotenv"
)

func init() {
	LoadEnvFiles()
}

// LoadEnvFiles provides functionality.
func LoadEnvFiles() {
	env := getEnvironment()
	envFile := ".env." + env

	if tryLoadEnv(envFile, env) {
		return
	}

	if tryLoadEnv(".env", "") {
		return
	}

	if env != "test" {
		log.Printf("Warning: No .env file found")
	} else {
		log.Printf("Note: No .env file loaded in test environment (this is normal)")
	}
}

func tryLoadEnv(filename, envName string) bool {
	if godotenv.Load(filename) == nil {
		if envName != "" {
			log.Printf(".env.%s file loaded successfully", envName)
		} else {
			log.Println(".env file loaded successfully")
		}
		return true
	}

	if cwd := os.Getenv("CWD"); cwd != "" {
		path := filepath.Join(cwd, filename)
		if godotenv.Load(path) == nil {
			if envName != "" {
				log.Printf(".env.%s file loaded from %s", envName, cwd)
			} else {
				log.Printf(".env file loaded from %s", cwd)
			}
			return true
		}
	}

	dir, _ := os.Getwd()
	for {
		path := filepath.Join(dir, filename)
		if godotenv.Load(path) == nil {
			if envName != "" {
				log.Printf(".env.%s file loaded from %s", envName, dir)
			} else {
				log.Printf(".env file loaded from %s", dir)
			}
			return true
		}
		parent := filepath.Dir(dir)
		if parent == dir {
			break
		}
		if _, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil {
			break
		}
		dir = parent
	}

	return false
}

// getEnvironment determines the current environment from various environment variables
func getEnvironment() string {
	// Check RSMON_ENV first (rsmon-specific)
	if env := os.Getenv("RSMON_ENV"); env != "" {
		return env
	}
	// Then check GO_ENV (standard)
	if env := os.Getenv("GO_ENV"); env != "" {
		return env
	}

	// Default to development
	return "development"
}