package config

import (
	"fmt"
	"os"
	"strconv"
)

// Config 网关配置
type Config struct {
	Server ServerConfig
	Dubbo  DubboConfig
	JWT    JWTConfig
	OSS    OSSConfig
}

// ServerConfig 服务器配置
type ServerConfig struct {
	Port string
	Mode string // debug, release, test
}

// DubboConfig Dubbo 服务配置
type DubboConfig struct {
	UserServiceURL     string
	SocialServiceURL   string
	AssetServiceURL    string
	GalleryServiceURL string
	ActivityServiceURL string
}

// JWTConfig JWT 配置
type JWTConfig struct {
	Secret string
}

// OSSConfig OSS 配置
type OSSConfig struct {
	Region          string
	BucketName      string
	RoleArn         string
	AccessKeyID     string
	AccessKeySecret string
	AvatarDir       string // 头像上传目录，如 "avatar/"
	AssetDir        string // 资产上传目录，如 "asset/"
	TokenExpireTime int    // Token 过期时间（秒），默认 3600
}

// GetUploadDir 根据类型获取上传目录
func (c *OSSConfig) GetUploadDir(uploadType string) string {
	switch uploadType {
	case "avatar":
		return c.AvatarDir
	case "asset":
		return c.AssetDir
	default:
		return c.AssetDir // 默认使用 asset 目录
	}
}

// Load 加载配置
func Load() *Config {
	return &Config{
		Server: ServerConfig{
			Port: getEnv("SERVER_PORT", "8080"),
			Mode: getEnv("GIN_MODE", "debug"),
		},
		Dubbo: DubboConfig{
			UserServiceURL:     getEnv("DUBBO_USER_SERVICE_URL", "tri://127.0.0.1:20000"),
			SocialServiceURL:   getEnv("DUBBO_SOCIAL_SERVICE_URL", "tri://127.0.0.1:20002"),
			AssetServiceURL:    getEnv("DUBBO_ASSET_SERVICE_URL", "tri://127.0.0.1:20003"),
			GalleryServiceURL:  getEnv("DUBBO_GALLERY_SERVICE_URL", "tri://127.0.0.1:20004"),
			ActivityServiceURL: getEnv("DUBBO_ACTIVITY_SERVICE_URL", "tri://127.0.0.1:20005"),
		},
		JWT: JWTConfig{
			Secret: getEnv("JWT_SECRET", "topfans-secret-key-please-change-in-production"),
		},
		OSS: OSSConfig{
			Region:          getEnv("OSS_REGION", "cn-shanghai"),
			BucketName:      getEnv("OSS_BUCKET_NAME", "top-fans-test"),
			RoleArn:         getEnv("OSS_STS_ROLE_ARN", "acs:ram::1387642798143585:role/top-fans-oss-user"),
			AccessKeyID:     getEnv("OSS_ACCESS_KEY_ID", "LTAI5tNaAjTNiHnefMCG3q4J"),
			AccessKeySecret: getEnv("OSS_ACCESS_KEY_SECRET", "48wwZvNkUn1PO1xWjV4HuE5JjB6G7c"),
			AvatarDir:       getEnv("OSS_AVATAR_DIR", "avatar/"),
			AssetDir:        getEnv("OSS_ASSET_DIR", "asset/"),
			TokenExpireTime: getEnvInt("OSS_TOKEN_EXPIRE_TIME", 3600),
		},
	}
}

// getEnv 获取环境变量，如果不存在则返回默认值
func getEnv(key, defaultValue string) string {
	value := os.Getenv(key)
	if value == "" {
		return defaultValue
	}
	return value
}

// getEnvInt 获取整型环境变量，如果不存在或解析失败则返回默认值
func getEnvInt(key string, defaultValue int) int {
	value := os.Getenv(key)
	if value == "" {
		return defaultValue
	}
	intValue, err := strconv.Atoi(value)
	if err != nil {
		return defaultValue
	}
	return intValue
}

// Validate 验证配置
func (c *Config) Validate() error {
	if c.Server.Port == "" {
		return fmt.Errorf("server port is required")
	}
	if c.Dubbo.UserServiceURL == "" {
		return fmt.Errorf("dubbo user service URL is required")
	}
	if c.Dubbo.SocialServiceURL == "" {
		return fmt.Errorf("dubbo social service URL is required")
	}
	if c.Dubbo.AssetServiceURL == "" {
		return fmt.Errorf("dubbo asset service URL is required")
	}
	if c.Dubbo.GalleryServiceURL == "" {
		return fmt.Errorf("dubbo gallery service URL is required")
	}
	if c.Dubbo.ActivityServiceURL == "" {
		return fmt.Errorf("dubbo activity service URL is required")
	}
	if c.JWT.Secret == "" {
		return fmt.Errorf("JWT secret is required")
	}
	return nil
}