package config

import (
	"fmt"
	"os"
	"sync"

	"gopkg.in/yaml.v3"
)

type ServerConfig struct {
	UDPPort int `yaml:"udp_port"`
}

type DatabaseConfig struct {
	Host     string `yaml:"host"`
	Port     int    `yaml:"port"`
	User     string `yaml:"user"`
	Password string `yaml:"password"`
	DBName   string `yaml:"dbname"`
	SSLMode  string `yaml:"sslmode"`
}

type Config struct {
	Server   ServerConfig   `yaml:"server"`
	Database DatabaseConfig `yaml:"database"`
}

var (
	instance *Config
	once     sync.Once
)

func GetConfig() *Config {
	once.Do(func() {
		instance = &Config{}
		err := instance.loadConfig()
		if err != nil {
			panic(fmt.Sprintf("加载配置文件失败: %v", err))
		}
	})
	return instance
}

func (c *Config) loadConfig() error {
	data, err := os.ReadFile("config.yaml")
	if err != nil {
		return fmt.Errorf("读取配置文件失败: %v", err)
	}

	err = yaml.Unmarshal(data, c)
	if err != nil {
		return fmt.Errorf("解析配置文件失败: %v", err)
	}

	return nil
}