package qiniu

import (
	"context"
	"fmt"
	"git.bvbej.com/bvbej/base-golang/pkg/md5"
	"github.com/qiniu/go-sdk/v7/auth/qbox"
	"github.com/qiniu/go-sdk/v7/storage"
	"net/http"
	"net/url"
	"strings"
	"time"
)

var _ QiNiu = (*qiNiu)(nil)

type QiNiu interface {
	i()
	GetUploadToken(ttl uint64) string
	GetPrivateURL(key string, ttl uint64) string
	VerifyCallback(req *http.Request) (bool, error)
	UploadFile(key, localFile string, zone *storage.Region) (*storage.PutRet, error)
	DelFile(key string, zone *storage.Region) error
	TimestampSecuritySign(path string, ttl time.Duration) string
	GetFileInfo(key string) *storage.FileInfo
}

type qiNiu struct {
	mac         *qbox.Mac
	bucket      string
	domain      string
	securityKey string
	md5         md5.MD5
}

type PutRet struct {
	Key   string `json:"key"`
	Hash  string `json:"hash"`
	Fsize int    `json:"fsize"`
}

func New(accessKey, secretKey, bucket, domain, securityKey string) QiNiu {
	return &qiNiu{
		mac:         qbox.NewMac(accessKey, secretKey),
		bucket:      bucket,
		domain:      domain,
		securityKey: securityKey,
		md5:         md5.New(),
	}
}

func (q *qiNiu) i() {}

func (q *qiNiu) GetUploadToken(ttl uint64) string {
	putPolicy := storage.PutPolicy{
		Scope:   q.bucket,
		Expires: ttl,
	}
	return putPolicy.UploadToken(q.mac)
}

func (q *qiNiu) GetPrivateURL(key string, ttl uint64) string {
	deadline := time.Now().Add(time.Second * time.Duration(ttl)).Unix()
	return storage.MakePrivateURL(q.mac, q.domain, key, deadline)
}

func (q *qiNiu) VerifyCallback(req *http.Request) (bool, error) {
	return q.mac.VerifyCallback(req)
}

func (q *qiNiu) UploadFile(key, localFile string, zone *storage.Region) (*storage.PutRet, error) {
	upToken := q.GetUploadToken(60)
	cfg := storage.Config{
		Zone:          zone, //空间对应的机房
		UseHTTPS:      true, //是否使用https域名
		UseCdnDomains: true, //上传是否使用CDN上传加速
	}
	//构建表单上传的对象
	formUploader := storage.NewFormUploader(&cfg)
	ret := &storage.PutRet{}
	// 可选配置
	putExtra := storage.PutExtra{}
	err := formUploader.PutFile(context.Background(), ret, upToken, key, localFile, &putExtra)
	if err != nil {
		return nil, err
	}
	return ret, nil
}

func (q *qiNiu) DelFile(key string, zone *storage.Region) error {
	cfg := storage.Config{
		Zone:          zone, //空间对应的机房
		UseHTTPS:      true, //是否使用https域名
		UseCdnDomains: true, //上传是否使用CDN上传加速
	}
	bucketManager := storage.NewBucketManager(q.mac, &cfg)
	err := bucketManager.Delete(q.bucket, key)
	if err != nil {
		return err
	}
	return nil
}

func (q *qiNiu) TimestampSecuritySign(path string, ttl time.Duration) string {
	sep := "/"
	path = strings.Trim(path, sep)
	splits := strings.Split(path, sep)
	for i, split := range splits {
		splits[i] = url.QueryEscape(split)
	}
	path = sep + strings.Join(splits, sep)

	unix := time.Now().Add(ttl).Unix()
	hex := fmt.Sprintf("%x", unix)

	encrypt := q.md5.Encrypt(q.securityKey + path + hex)

	param := make(url.Values)
	param.Set("sign", encrypt)
	param.Set("t", hex)

	return param.Encode()
}

func (q *qiNiu) GetFileInfo(key string) *storage.FileInfo {
	cfg := storage.Config{
		UseHTTPS: true, // 是否使用https域名进行资源管理
	}

	bucketManager := storage.NewBucketManager(q.mac, &cfg)
	fileInfo, sErr := bucketManager.Stat(q.bucket, key)
	if sErr != nil {
		return nil
	}

	return &fileInfo
}