package oss

import (
	"bytes"
	"crypto/tls"
	"eta_gn/eta_obs/global"
	"fmt"
	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/credentials"
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/s3"
	"io/ioutil"
	"net/http"
	"time"
)

type S3Oss struct{}

func (m *S3Oss) UploadFile(fileName, localFile, savePath string) (resourceUrl string, err error) {
	defer func() {
		if err != nil {
			fmt.Println(err.Error())
		}
	}()

	// 默认使用后端这个, 这里有两个配置的原因是
	// 前端上传跨域问题可能会使用反向代理来解决, 这样的话同一个endpoint就会导致一端正常另一端不正常
	endpoint := global.CONFIG.Oss.BackEndPoint
	if endpoint == "" {
		endpoint = global.CONFIG.Oss.EndPoint
	}
	accessKey := global.CONFIG.Oss.AccessKeyId
	secretKey := global.CONFIG.Oss.AccessKeySecret
	region := global.CONFIG.Oss.RegionId
	bucketName := global.CONFIG.Oss.BucketName
	uploadDir := global.CONFIG.Oss.UploadDir

	config := &aws.Config{
		Region:           aws.String(region),
		Credentials:      credentials.NewStaticCredentials(accessKey, secretKey, ""),
		Endpoint:         aws.String(endpoint),
		S3ForcePathStyle: aws.Bool(global.CONFIG.Oss.ForceStyle),
		DisableSSL:       aws.Bool(global.CONFIG.Oss.DisableSSL),
	}
	if global.CONFIG.Oss.DisableSSL {
		config.HTTPClient = &http.Client{
			Transport: &http.Transport{
				TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
			},
		}
	}
	//b, _ := json.Marshal(config)
	//fmt.Println(string(b))

	// 创建AWS会话
	sess, e := session.NewSession(config)
	if e != nil {
		err = fmt.Errorf("new session err: %s", e.Error())
		return
	}

	// 创建S3服务客户端
	client := s3.New(sess)

	// 读取文件内容
	fileContent, e := ioutil.ReadFile(localFile)
	if e != nil {
		err = fmt.Errorf("read file err: %s", e.Error())
		return
	}

	path := savePath
	if savePath == "" {
		path = uploadDir + time.Now().Format("200601/20060102/") + fileName
	}
	putObjectInput := &s3.PutObjectInput{
		Bucket: aws.String(bucketName),
		Key:    aws.String(path),
		Body:   bytes.NewReader(fileContent),
	}
	if global.CONFIG.Oss.OpenAcl {
		putObjectInput.ACL = aws.String(s3.ObjectCannedACLPublicRead)
	}
	fmt.Printf("put object input: %+v\n", putObjectInput)
	_, e = client.PutObject(putObjectInput)
	if e != nil {
		err = fmt.Errorf("put object err: %s", e.Error())
		return
	}
	resourceUrl = global.CONFIG.Oss.ImgHost + path
	if global.CONFIG.Oss.ResourceProxyUrl != "" {
		resourceUrl = global.CONFIG.Oss.ResourceProxyUrl + path
	}
	return
}

func (m *S3Oss) GetUploadToken() (token OssToken, err error) {
	token.Endpoint = global.CONFIG.Oss.EndPoint
	token.AccessKeyId = global.CONFIG.Oss.AccessKeyId
	token.AccessKeySecret = global.CONFIG.Oss.AccessKeySecret
	token.RegionId = global.CONFIG.Oss.RegionId
	token.Bucketname = global.CONFIG.Oss.BucketName
	token.ImgHost = global.CONFIG.Oss.ImgHost
	token.Port = global.CONFIG.Oss.Port

	token.S3ForceStyle = global.CONFIG.Oss.ForceStyle
	token.S3Protocol = global.CONFIG.Oss.Protocol
	return
}