package common

import (
	"fmt"
	"os"
)

type Config struct {
	RustFSEndpoint        string
	RustFSAccessKeyID     string
	RustFSSecretAccessKey string
	RustFSRegion          string
	ServerPort            string
	AuthAPIKey            string
	RequestTimeout        int
	GRPCAuthAddr          string
	OTelEndpoint          string
}

func LoadConfig() *Config {
	return &Config{
		RustFSEndpoint:        getEnv("RUSTFS_ENDPOINT_URL", "http://192.168.1.154:9000"),
		RustFSAccessKeyID:     getEnv("RUSTFS_ACCESS_KEY_ID", ""),
		RustFSSecretAccessKey: getEnv("RUSTFS_SECRET_ACCESS_KEY", ""),
		RustFSRegion:          getEnv("RUSTFS_REGION", "us-east-1"),
		ServerPort:            getEnv("SERVER_PORT", "8080"),
		AuthAPIKey:            getEnv("AUTH_API_KEY", ""),
		RequestTimeout:        30,
		GRPCAuthAddr:          getEnv("GRPC_AUTH_ADDR", ""),
		OTelEndpoint:          getEnv("OTEL_ENDPOINT", "192.168.1.154:4316"),
	}
}

func (c *Config) Validate() error {
	if c.AuthAPIKey == "" && c.GRPCAuthAddr == "" {
		return fmt.Errorf("AUTH_API_KEY or GRPC_AUTH_ADDR is required")
	}
	if c.RustFSAccessKeyID == "" {
		return fmt.Errorf("RUSTFS_ACCESS_KEY_ID is required")
	}
	if c.RustFSSecretAccessKey == "" {
		return fmt.Errorf("RUSTFS_SECRET_ACCESS_KEY is required")
	}
	if c.RustFSEndpoint == "" {
		return fmt.Errorf("RUSTFS_ENDPOINT_URL is required")
	}
	return nil
}

func getEnv(key, fallback string) string {
	if value, ok := os.LookupEnv(key); ok {
		return value
	}
	return fallback
}