package cos

import (
	"context"
	"encoding/xml"
	"net/http"
)

// BucketService 相关 API
type BucketService service

// BucketGetResult is the result of GetBucket
type BucketGetResult struct {
	XMLName        xml.Name `xml:"ListBucketResult"`
	Name           string
	Prefix         string `xml:"Prefix,omitempty"`
	Marker         string `xml:"Marker,omitempty"`
	NextMarker     string `xml:"NextMarker,omitempty"`
	Delimiter      string `xml:"Delimiter,omitempty"`
	MaxKeys        int
	IsTruncated    bool
	Contents       []Object `xml:"Contents,omitempty"`
	CommonPrefixes []string `xml:"CommonPrefixes>Prefix,omitempty"`
	EncodingType   string   `xml:"Encoding-Type,omitempty"`
}

// BucketGetOptions is the option of GetBucket
type BucketGetOptions struct {
	Prefix       string `url:"prefix,omitempty"`
	Delimiter    string `url:"delimiter,omitempty"`
	EncodingType string `url:"encoding-type,omitempty"`
	Marker       string `url:"marker,omitempty"`
	MaxKeys      int    `url:"max-keys,omitempty"`
}

// Get Bucket请求等同于 List Object请求，可以列出该Bucket下部分或者所有Object，发起该请求需要拥有Read权限。
//
// https://www.qcloud.com/document/product/436/7734
func (s *BucketService) Get(ctx context.Context, opt *BucketGetOptions) (*BucketGetResult, *Response, error) {
	var res BucketGetResult
	sendOpt := sendOptions{
		baseURL:  s.client.BaseURL.BucketURL,
		uri:      "/",
		method:   http.MethodGet,
		optQuery: opt,
		result:   &res,
	}
	resp, err := s.client.send(ctx, &sendOpt)
	return &res, resp, err
}

// BucketPutOptions is same to the ACLHeaderOptions
type BucketPutOptions ACLHeaderOptions

// Put Bucket请求可以在指定账号下创建一个Bucket。
//
// https://www.qcloud.com/document/product/436/7738
func (s *BucketService) Put(ctx context.Context, opt *BucketPutOptions) (*Response, error) {
	sendOpt := sendOptions{
		baseURL:   s.client.BaseURL.BucketURL,
		uri:       "/",
		method:    http.MethodPut,
		optHeader: opt,
	}
	resp, err := s.client.send(ctx, &sendOpt)
	return resp, err
}

// Delete Bucket请求可以在指定账号下删除Bucket，删除之前要求Bucket为空。
//
// https://www.qcloud.com/document/product/436/7732
func (s *BucketService) Delete(ctx context.Context) (*Response, error) {
	sendOpt := sendOptions{
		baseURL: s.client.BaseURL.BucketURL,
		uri:     "/",
		method:  http.MethodDelete,
	}
	resp, err := s.client.send(ctx, &sendOpt)
	return resp, err
}

// Head Bucket请求可以确认是否存在该Bucket，是否有权限访问，Head的权限与Read一致。
//
//   当其存在时，返回 HTTP 状态码200；
//   当无权限时，返回 HTTP 状态码403；
//   当不存在时，返回 HTTP 状态码404。
//
// https://www.qcloud.com/document/product/436/7735
func (s *BucketService) Head(ctx context.Context) (*Response, error) {
	sendOpt := sendOptions{
		baseURL: s.client.BaseURL.BucketURL,
		uri:     "/",
		method:  http.MethodHead,
	}
	resp, err := s.client.send(ctx, &sendOpt)
	return resp, err
}

// Bucket is the meta info of Bucket
type Bucket struct {
	Name         string
	Region       string `xml:"Location,omitempty"`
	CreationDate string `xml:",omitempty"`
}