package conf

import (
	"log"
	"os"

	"gopkg.in/yaml.v3"
)

// DefaultConfig 结构体用于存储数据库配置信息
var DefaultConfig *Config

// Config 结构体用于存储配置信息
type Config struct {
	Server          ServerConfig `yaml:"server"`
	DatabaseConfigs DBConfig     `yaml:"databaseConfigs"`
}

// ServerConfig 结构体用于存储服务器配置信息
type ServerConfig struct {
	RunMode              string `yaml:"runMode"`
	HttpPort             int    `yaml:"httpPort"`
	AvailableAddrListNum int    `yaml:"availableAddrListNum"`
}

// InitConfig 设置全局配置变量
func InitConfig(configFilePath string) {
	config, err := readConfig(configFilePath)
	if err != nil {
		log.Println("open config file error, use default config", err)
		setDefaultConfig()
	}
	DefaultConfig = &config
}

// setDefaultConfig 设置默认配置
func setDefaultConfig() {
	DefaultConfig = &Config{
		Server: ServerConfig{
			RunMode:              "debug",
			HttpPort:             8090,
			AvailableAddrListNum: 20,
		},
		DatabaseConfigs: DBConfig{
			IdentificationName: "MYSQL_CON",
			DB:                 "sql_test",
			User:               "root",
			Password:           "12345678",
			Host:               "localhost",
			Port:               "3306",
			TimeZone:           "Local",
			Type:               "mysql",
		},
	}
}

// readConfig 函数用于读取 YAML 配置文件
func readConfig(filePath string) (Config, error) {
	var config Config

	file, err := os.Open(filePath)
	if err != nil {
		return config, err
	}
	defer file.Close()

	decoder := yaml.NewDecoder(file)
	err = decoder.Decode(&config)
	if err != nil {
		return config, err
	}

	return config, nil
}