kefu_cloud/server/internal/config/config.go

package config

import (
	"os"
	"strconv"
	"strings"
	"time"
)

type Config struct {
	Server         ServerConfig
	Database       DatabaseConfig
	JWT            JWTConfig
	Storage        StorageConfig
	Redis          RedisConfig
	AllowedOrigins []string
}

type ServerConfig struct {
	Port string
	Mode string
}

type DatabaseConfig struct {
	Host            string
	Port            string
	User            string
	Password        string
	Name            string
	SSLMode         string
	MaxOpenConns    int
	MaxIdleConns    int
	ConnMaxLifetime time.Duration
	ConnMaxIdleTime time.Duration
}

type JWTConfig struct {
	Secret      string
	ExpireTime  time.Duration
	ExpireHours int
}

// StorageConfig S3 兼容对象存储（MinIO / OSS / COS / S3 共用字段）
type StorageConfig struct {
	Endpoint     string // 如 localhost:9100（开发 MinIO）或 oss-cn-hangzhou.aliyuncs.com
	AccessKey    string
	SecretKey    string
	Bucket       string
	UseSSL       bool
	Region       string
	PublicBase   string // 浏览器可访问前缀，如 http://localhost:9100/kefu
	MaxUploadMB  int
	MaxImageEdge int // 最长边像素
	WebPQuality  float32
}

// RedisConfig 可选的跨节点 WebSocket 广播总线（多 API 副本部署时启用）。
type RedisConfig struct {
	Addr     string // 为空表示单实例模式，WS 广播仅进程内
	Password string
	DB       int
}

func Load() *Config {
	return &Config{
		Server: ServerConfig{
			Port: getEnv("SERVER_PORT", "8080"),
			Mode: getEnv("GIN_MODE", "debug"),
		},
		Database: DatabaseConfig{
			Host:            getEnv("DB_HOST", "localhost"),
			Port:            getEnv("DB_PORT", "5433"),
			User:            getEnv("DB_USER", "postgres"),
			Password:        getEnv("DB_PASSWORD", "postgres"),
			Name:            getEnv("DB_NAME", "kefu_cloud"),
			SSLMode:         getEnv("DB_SSLMODE", "disable"),
			MaxOpenConns:    getEnvInt("DB_MAX_OPEN_CONNS", 50),
			MaxIdleConns:    getEnvInt("DB_MAX_IDLE_CONNS", 10),
			ConnMaxLifetime: time.Duration(getEnvInt("DB_CONN_MAX_LIFETIME_MINUTES", 60)) * time.Minute,
			ConnMaxIdleTime: time.Duration(getEnvInt("DB_CONN_MAX_IDLE_MINUTES", 15)) * time.Minute,
		},
		JWT: func() JWTConfig {
			hours := getEnvInt("JWT_EXPIRE_HOURS", 24)
			if hours <= 0 {
				hours = 24
			}
			return JWTConfig{
				Secret:      getEnv("JWT_SECRET", "kefu-cloud-secret-key"),
				ExpireTime:  time.Duration(hours) * time.Hour,
				ExpireHours: hours,
			}
		}(),
		Storage: StorageConfig{
			// 默认映射宿主机 9100→容器 9000，避免与其它项目 MinIO 冲突
			Endpoint:     getEnv("STORAGE_ENDPOINT", "localhost:9100"),
			AccessKey:    getEnv("STORAGE_ACCESS_KEY", "minioadmin"),
			SecretKey:    getEnv("STORAGE_SECRET_KEY", "minioadmin"),
			Bucket:       getEnv("STORAGE_BUCKET", "kefu"),
			UseSSL:       getEnvBool("STORAGE_USE_SSL", false),
			Region:       getEnv("STORAGE_REGION", "us-east-1"),
			PublicBase:   getEnv("STORAGE_PUBLIC_BASE_URL", "http://localhost:9100/kefu"),
			MaxUploadMB:  getEnvInt("STORAGE_MAX_UPLOAD_MB", 10),
			MaxImageEdge: getEnvInt("STORAGE_MAX_IMAGE_EDGE", 1920),
			WebPQuality:  float32(getEnvInt("STORAGE_WEBP_QUALITY", 80)),
		},
		AllowedOrigins: splitCSV(getEnv("CORS_ALLOW_ORIGINS", "*")),
		Redis: RedisConfig{
			Addr:     getEnv("REDIS_ADDR", ""),
			Password: getEnv("REDIS_PASSWORD", ""),
			DB:       getEnvInt("REDIS_DB", 0),
		},
	}
}

func splitCSV(raw string) []string {
	parts := strings.Split(raw, ",")
	result := make([]string, 0, len(parts))
	for _, part := range parts {
		if value := strings.TrimSpace(part); value != "" {
			result = append(result, value)
		}
	}
	if len(result) == 0 {
		return []string{"*"}
	}
	return result
}

func (d *DatabaseConfig) DSN() string {
	return "host=" + d.Host + " port=" + d.Port + " user=" + d.User +
		" password=" + d.Password + " dbname=" + d.Name + " sslmode=" + d.SSLMode
}

func getEnv(key, fallback string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return fallback
}

func getEnvBool(key string, fallback bool) bool {
	v := os.Getenv(key)
	if v == "" {
		return fallback
	}
	b, err := strconv.ParseBool(v)
	if err != nil {
		return fallback
	}
	return b
}

func getEnvInt(key string, fallback int) int {
	v := os.Getenv(key)
	if v == "" {
		return fallback
	}
	n, err := strconv.Atoi(v)
	if err != nil {
		return fallback
	}
	return n
}