package config

import (
	"os"

	"gopkg.in/yaml.v3"
)

// Config 应用配置结构体
type Config struct {
	Server ServerConfig `yaml:"server"`
	OSS    OSSConfig    `yaml:"oss"`
	MySQL  MySQLConfig  `yaml:"mysql"`
	Upload UploadConfig `yaml:"upload"`
}

// ServerConfig 服务器配置
type ServerConfig struct {
	Port           string   `yaml:"port"`
	AllowedOrigins []string `yaml:"allowed_origins"`
}

// OSSConfig 阿里云OSS配置
type OSSConfig struct {
	Endpoint        string `yaml:"endpoint"`
	BucketName      string `yaml:"bucket_name"`
	AccessKeyID     string `yaml:"access_key_id"`
	AccessKeySecret string `yaml:"access_key_secret"`
	ObjectPrefix    string `yaml:"object_prefix"`
}

// MySQLConfig MySQL数据库配置
type MySQLConfig struct {
	Host     string `yaml:"host"`
	Port     int    `yaml:"port"`
	Username string `yaml:"username"`
	Password string `yaml:"password"`
	Database string `yaml:"database"`
	Charset  string `yaml:"charset"`
}

// UploadConfig 上传配置
type UploadConfig struct {
	AllowImageTypes string `yaml:"allow_image_types"`
	MaxFileSize     int64  `yaml:"max_file_size"`
}

// LoadConfig 从文件加载配置
func LoadConfig(filename string) (*Config, error) {
	data, err := os.ReadFile(filename)
	if err != nil {
		return nil, err
	}

	var config Config
	if err := yaml.Unmarshal(data, &config); err != nil {
		return nil, err
	}

	return &config, nil
}