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:"EncodingType,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 struct {
	XCosACL                   string                     `header:"x-cos-acl,omitempty" url:"-" xml:"-"`
	XCosGrantRead             string                     `header:"x-cos-grant-read,omitempty" url:"-" xml:"-"`
	XCosGrantWrite            string                     `header:"x-cos-grant-write,omitempty" url:"-" xml:"-"`
	XCosGrantFullControl      string                     `header:"x-cos-grant-full-control,omitempty" url:"-" xml:"-"`
	XCosGrantReadACP          string                     `header:"x-cos-grant-read-acp,omitempty" url:"-" xml:"-"`
	XCosGrantWriteACP         string                     `header:"x-cos-grant-write-acp,omitempty" url:"-" xml:"-"`
	CreateBucketConfiguration *CreateBucketConfiguration `header:"-" url:"-" xml:"-"`
}
type CreateBucketConfiguration struct {
	XMLName        xml.Name `xml:"CreateBucketConfiguration"`
	BucketAZConfig string   `xml:"BucketAZConfig,omitempty"`
}

// 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,
	}
	if opt != nil && opt.CreateBucketConfiguration != nil {
		sendOpt.body = opt.CreateBucketConfiguration
	}
	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"`
}

type BucketGetObjectVersionsOptions struct {
	Prefix          string `url:"prefix,omitempty"`
	Delimiter       string `url:"delimiter,omitempty"`
	EncodingType    string `url:"encoding-type,omitempty"`
	KeyMarker       string `url:"key-marker,omitempty"`
	VersionIdMarker string `url:"version-id-marker,omitempty"`
	MaxKeys         int    `url:"max-keys,omitempty"`
}

type BucketGetObjectVersionsResult struct {
	XMLName             xml.Name                         `xml:"ListVersionsResult"`
	Name                string                           `xml:"Name,omitempty"`
	EncodingType        string                           `xml:"EncodingType,omitempty"`
	Prefix              string                           `xml:"Prefix,omitempty"`
	KeyMarker           string                           `xml:"KeyMarker,omitempty"`
	VersionIdMarker     string                           `xml:"VersionIdMarker,omitempty"`
	MaxKeys             int                              `xml:"MaxKeys,omitempty"`
	Delimiter           string                           `xml:"Delimiter,omitempty"`
	IsTruncated         bool                             `xml:"IsTruncated,omitempty"`
	NextKeyMarker       string                           `xml:"NextKeyMarker,omitempty"`
	NextVersionIdMarker string                           `xml:"NextVersionIdMarker,omitempty"`
	CommonPrefixes      []string                         `xml:"CommonPrefixes>Prefix,omitempty"`
	Version             []ListVersionsResultVersion      `xml:"Version,omitempty"`
	DeleteMarker        []ListVersionsResultDeleteMarker `xml:"DeleteMarker,omitempty"`
}

type ListVersionsResultVersion struct {
	Key          string `xml:"Key,omitempty"`
	VersionId    string `xml:"VersionId,omitempty"`
	IsLatest     bool   `xml:"IsLatest,omitempty"`
	LastModified string `xml:"LastModified,omitempty"`
	ETag         string `xml:"ETag,omitempty"`
	Size         int    `xml:"Size,omitempty"`
	StorageClass string `xml:"StorageClass,omitempty"`
	Owner        *Owner `xml:"Owner,omitempty"`
}

type ListVersionsResultDeleteMarker struct {
	Key          string `xml:"Key,omitempty"`
	VersionId    string `xml:"VersionId,omitempty"`
	IsLatest     bool   `xml:"IsLatest,omitempty"`
	LastModified string `xml:"LastModified,omitempty"`
	Owner        *Owner `xml:"Owner,omitempty"`
}

func (s *BucketService) GetObjectVersions(ctx context.Context, opt *BucketGetObjectVersionsOptions) (*BucketGetObjectVersionsResult, *Response, error) {
	var res BucketGetObjectVersionsResult
	sendOpt := sendOptions{
		baseURL:  s.client.BaseURL.BucketURL,
		uri:      "/?versions",
		method:   http.MethodGet,
		optQuery: opt,
		result:   &res,
	}
	resp, err := s.client.send(ctx, &sendOpt)
	return &res, resp, err
}