package config

import (
	"sync/atomic"
)

// DoubaoConfig holds 火山引擎豆包 ASR credentials.
type DoubaoConfig struct {
	AppKey     string `yaml:"app_key"`
	AccessKey  string `yaml:"access_key"`
	ResourceID string `yaml:"resource_id"`
}

// SecurityConfig holds authentication settings.
type SecurityConfig struct {
	Token string `yaml:"token"`
}

// ServerConfig holds server settings.
type ServerConfig struct {
	Port    int  `yaml:"port"`
	TLSAuto bool `yaml:"tls_auto"`
}

// Config is the top-level configuration.
type Config struct {
	Doubao   DoubaoConfig   `yaml:"doubao"`
	Server   ServerConfig   `yaml:"server"`
	Security SecurityConfig `yaml:"security"`
}

// defaults returns a Config with default values.
func defaults() Config {
	return Config{
		Doubao: DoubaoConfig{
			ResourceID: "volc.seedasr.sauc.duration",
		},
		Server: ServerConfig{
			Port:    8443,
			TLSAuto: true,
		},
	}
}

// global holds the current config atomically for concurrent reads.
var global atomic.Value

// Get returns the current config snapshot. Safe for concurrent use.
func Get() Config {
	if v := global.Load(); v != nil {
		return v.(Config)
	}
	return defaults()
}

// store updates the global config.
func store(cfg Config) {
	global.Store(cfg)
}