package config

import (
	"fmt"
	"os"
	"reflect"
	"sync"

	"github.com/BurntSushi/toml"
)

var (
	config map[string]interface{}
	mu     sync.RWMutex
	once   sync.Once
)

// loadConfig 加载配置文件
func loadConfig() error {
	_, err := toml.DecodeFile("config.toml", &config)
	return err
}

// GetConfig 获取配置，使用 sync.Once 确保只加载一次
func GetConfig() map[string]interface{} {
	once.Do(func() {
		mu.Lock()
		defer mu.Unlock()
		if err := loadConfig(); err != nil {
			fmt.Printf("加载配置文件失败: %v\n", err)
			os.Exit(1)
		}
	})
	return config
}

// ReloadConfig 重新加载配置文件
func ReloadConfig() error {
	mu.Lock()
	defer mu.Unlock()
	return loadConfig()
}

// ModifyConfig 修改配置并写回文件
func ModifyConfig(key string, value interface{}) error {
	mu.Lock()
	defer mu.Unlock()

	config[key] = value

	file, err := os.Create("config.toml")
	if err != nil {
		return err
	}
	defer file.Close()

	encoder := toml.NewEncoder(file)
	return encoder.Encode(config)
}

// PrintConfig 递归打印配置内容
func PrintConfig(m map[string]interface{}, indent string) {
	for key, value := range m {
		switch v := value.(type) {
		case map[string]interface{}:
			fmt.Printf("%s%s (type: %s):\n", indent, key, reflect.TypeOf(v))
			PrintConfig(v, indent+"  ")
		case []interface{}:
			fmt.Printf("%s%s:\n", indent, key)
			for i, item := range v {
				switch itemValue := item.(type) {
				case map[string]interface{}:
					fmt.Printf("%s  [%d] (type: %s):\n", indent, i, reflect.TypeOf(itemValue))
					PrintConfig(itemValue, indent+"    ")
				default:
					fmt.Printf("%s  [%d] (type: %s): %v\n", indent, i, reflect.TypeOf(itemValue), item)
				}
			}
		default:
			fmt.Printf("%s%s (type: %s): %v\n", indent, key, reflect.TypeOf(value), value)
		}
	}
}