package utils

import (
	"adm-gateway/parser"
	"crypto/md5"
	"encoding/base64"
	"fmt"

	"github.com/aliyun/aliyun-oss-go-sdk/oss"
)

const (
	ossId       = "LTAI4Fjs1bNMd8k8LT41Fxxn"
	ossSecret   = "WlQJwVbxHIY4TIZwMIFA5QCye6n0Pl"
	ossEndpoint = "oss-cn-shanghai.aliyuncs.com"
	ossBucket   = "gd-image"
)

func Base64Encode(src []byte) []byte {
	return []byte(base64.StdEncoding.EncodeToString(src))
}

func Base64Decode(src string) ([]byte, error) {
	return base64.StdEncoding.DecodeString(src)
}

func MD5(src string) string {
	h := md5.New()
	h.Write([]byte(src))
	re := h.Sum(nil)
	return fmt.Sprintf("%x", re)
}

func isOssConfigured() bool {
	if parser.Conf.Oss.EndPoint == "" ||
		parser.Conf.Oss.Bucket == "" ||
		parser.Conf.Oss.AccessKey == "" ||
		parser.Conf.Oss.AccessSecret == "" {
		return false
	}
	return true
}

// OssGetUrl 获取oss下载地址url前缀
func OssGetUrl() string {
	if isOssConfigured() == false {
		return "https://" + ossBucket + "." + ossEndpoint
	}
	return "https://" + parser.Conf.Oss.Bucket + "." + parser.Conf.Oss.EndPoint
}

func ossGetInfo() (id, secret, bucket, endpoint string) {
	id = ossId
	secret = ossSecret
	bucket = ossBucket
	endpoint = ossEndpoint
	if isOssConfigured() {
		id = parser.Conf.Oss.AccessKey
		secret = parser.Conf.Oss.AccessSecret
		bucket = parser.Conf.Oss.Bucket
		endpoint = parser.Conf.Oss.EndPoint
	}
	return id, secret, bucket, endpoint
}

// OssUploadFile 上传文件到oss服务器
func OssUploadFile(path string, fileName string) error {
	id, secret, buck, endpoint := ossGetInfo()
	client, err := oss.New(endpoint, id, secret)
	if err != nil {
		return err
	}

	// 获取存储空间。
	bucket, err := client.Bucket(buck)
	if err != nil {
		return err
	}

	err = bucket.PutObjectFromFile(fileName, path)
	return err
}