package storage

import (
	"context"
	"fmt"
	"github.com/minio/minio-go"
	"net/url"
	"path"
	"strings"
	"time"

	log "github.com/sirupsen/logrus"
)

type MinioConfig struct {
	Bucket    string
	BaseUrl   string
	Endpoint  string
	AccessKey string
	SecretKey string
	Timeout   time.Duration
}

type Minio struct {
	inited bool
	config *MinioConfig
	client *minio.Client
}

func NewMinio(cfg *MinioConfig) Storage {
	if cfg.Endpoint == "" {
		u, _ := url.Parse(cfg.BaseUrl)
		cfg.Endpoint = u.Host
	}
	return &Minio{
		config: cfg,
		inited: false,
	}
}

func (s *Minio) Init() error {
	if s.inited {
		return nil
	}

	c, err := minio.New(s.config.Endpoint, s.config.AccessKey, s.config.SecretKey, false)
	if err != nil {
		return err
	}
	s.client = c
	s.inited = true
	return nil
}

func (s *Minio) Put(fileName, objectName string, onProcess func(fsize, uploaded int64)) error {
	if err := s.Init(); err != nil {
		return err
	}
	ctx, cancel := context.WithTimeout(context.Background(), s.config.Timeout)
	defer cancel()

	objectName = strings.TrimLeft(objectName, "/ ")
	ext := strings.TrimLeft(path.Ext(fileName), ".")

	_, err := s.client.FPutObjectWithContext(ctx, s.config.Bucket, objectName, fileName,
		minio.PutObjectOptions{ContentType: ext2ContentType(ext)})
	if err != nil {
		log.Errorf("upload file to minio error:%s", err.Error())
		return err
	}

	return nil
}

func (s *Minio) Del(objectName string) error {
	if err := s.Init(); err != nil {
		return err
	}

	err := s.client.RemoveObject(s.config.Bucket, objectName)
	if err != nil {
		log.Errorf("delete file to minio error:%s", err.Error())
		return err
	}
	return nil
}

func (s *Minio) Get(objectName, fileName string) error {
	if err := s.Init(); err != nil {
		return err
	}

	return s.client.FGetObject(s.config.Bucket, objectName, fileName, minio.GetObjectOptions{})
}

func (s *Minio) List(objectPrefix string) ([]string, error) {
	if err := s.Init(); err != nil {
		return nil, err
	}

	done := make(chan struct{})
	defer close(done)
	infos := s.client.ListObjectsV2(s.config.Bucket, objectPrefix, true, done)
	result := make([]string, 0)
	for info := range infos {
		result = append(result, info.Key)
	}
	return result, nil
}

func (s *Minio) Url(objectName string, expire time.Duration) string {
	if err := s.Init(); err != nil {
		return err.Error()
	}
	var params url.Values
	u, err := s.client.PresignedGetObject(s.config.Bucket, objectName, expire, params)
	if err != nil {
		return fmt.Sprintf("%s/%s/%s", s.config.BaseUrl, s.config.Bucket, objectName)
	}

	return u.String()

}

func (s *Minio) Stat(objectName string) (*ObjectInfo, error) {
	return nil, nil
}

func (s *Minio) Fetch(url, objectName string) error {
	return nil
}