// Update changes an existing endpoint with new data.
// All fields are optional in the provided EndpointOpts.
func Update(client *gophercloud.ServiceClient, endpointID string, opts EndpointOpts) UpdateResult {
	type endpoint struct {
		Interface *string `json:"interface,omitempty"`
		Name      *string `json:"name,omitempty"`
		Region    *string `json:"region,omitempty"`
		URL       *string `json:"url,omitempty"`
		ServiceID *string `json:"service_id,omitempty"`
	}

	type request struct {
		Endpoint endpoint `json:"endpoint"`
	}

	reqBody := request{Endpoint: endpoint{}}
	reqBody.Endpoint.Interface = gophercloud.MaybeString(string(opts.Availability))
	reqBody.Endpoint.Name = gophercloud.MaybeString(opts.Name)
	reqBody.Endpoint.Region = gophercloud.MaybeString(opts.Region)
	reqBody.Endpoint.URL = gophercloud.MaybeString(opts.URL)
	reqBody.Endpoint.ServiceID = gophercloud.MaybeString(opts.ServiceID)

	var result UpdateResult
	_, result.Err = client.Request("PATCH", endpointURL(client, endpointID), gophercloud.RequestOpts{
		JSONBody:     &reqBody,
		JSONResponse: &result.Body,
		OkCodes:      []int{200},
	})
	return result
}

// Update allows routers to be updated. You can update the name, administrative
// state, and the external gateway. For more information about how to set the
// external gateway for a router, see Create. This operation does not enable
// the update of router interfaces. To do this, use the AddInterface and
// RemoveInterface functions.
func Update(c *gophercloud.ServiceClient, id string, opts UpdateOpts) UpdateResult {
	type router struct {
		Name         *string      `json:"name,omitempty"`
		AdminStateUp *bool        `json:"admin_state_up,omitempty"`
		GatewayInfo  *GatewayInfo `json:"external_gateway_info,omitempty"`
	}

	type request struct {
		Router router `json:"router"`
	}

	reqBody := request{Router: router{
		Name:         gophercloud.MaybeString(opts.Name),
		AdminStateUp: opts.AdminStateUp,
	}}

	if opts.GatewayInfo != nil {
		reqBody.Router.GatewayInfo = opts.GatewayInfo
	}

	// Send request to API
	var res UpdateResult
	_, res.Err = perigee.Request("PUT", resourceURL(c, id), perigee.Options{
		MoreHeaders: c.AuthenticatedHeaders(),
		ReqBody:     &reqBody,
		Results:     &res.Body,
		OkCodes:     []int{200},
	})

	return res
}

// Create accepts a CreateOpts struct and uses the values to create a new
// logical router. When it is created, the router does not have an internal
// interface - it is not associated to any subnet.
//
// You can optionally specify an external gateway for a router using the
// GatewayInfo struct. The external gateway for the router must be plugged into
// an external network (it is external if its `router:external' field is set to
// true).
func Create(c *gophercloud.ServiceClient, opts CreateOpts) CreateResult {
	type router struct {
		Name         *string      `json:"name,omitempty"`
		AdminStateUp *bool        `json:"admin_state_up,omitempty"`
		TenantID     *string      `json:"tenant_id,omitempty"`
		GatewayInfo  *GatewayInfo `json:"external_gateway_info,omitempty"`
	}

	type request struct {
		Router router `json:"router"`
	}

	reqBody := request{Router: router{
		Name:         gophercloud.MaybeString(opts.Name),
		AdminStateUp: opts.AdminStateUp,
		TenantID:     gophercloud.MaybeString(opts.TenantID),
	}}

	if opts.GatewayInfo != nil {
		reqBody.Router.GatewayInfo = opts.GatewayInfo
	}

	var res CreateResult
	_, res.Err = perigee.Request("POST", rootURL(c), perigee.Options{
		MoreHeaders: c.AuthenticatedHeaders(),
		ReqBody:     &reqBody,
		Results:     &res.Body,
		OkCodes:     []int{201},
	})
	return res
}

// MeterStatistics gathers statistics based on filters, groups, and period options
func MeterStatistics(client *gophercloud.ServiceClient, n string, optsBuilder MeterStatisticsOptsBuilder) statisticsResult {
	var (
		res  statisticsResult
		url  = statisticsURL(client, n)
		opts gophercloud.RequestOpts
		err  error
		kind OptsKind
	)

	if optsBuilder != nil {
		kind = optsBuilder.Kind()
	}

	switch kind {
	case QueryOpts:
		query, err := optsBuilder.ToMeterStatisticsQuery()
		url += query
	case BodyContentOpts:
		opts.JSONBody, err = optsBuilder.ToMeterStatisticsQuery()
	}

	if err != nil {
		res.Err = err
		return res
	}

	_, res.Err = client.Get(url, &res.Body, &opts)
	return res
}

// Enable is a function that enables/disables a CDN container.
func Enable(c *gophercloud.ServiceClient, containerName string, opts EnableOptsBuilder) EnableResult {
	var res EnableResult
	h := c.AuthenticatedHeaders()

	if opts != nil {
		headers, err := opts.ToCDNContainerEnableMap()
		if err != nil {
			res.Err = err
			return res
		}

		for k, v := range headers {
			h[k] = v
		}
	}

	resp, err := c.Request("PUT", enableURL(c, containerName), gophercloud.RequestOpts{
		MoreHeaders: h,
		OkCodes:     []int{201, 202, 204},
	})
	if resp != nil {
		res.Header = resp.Header
	}
	res.Err = err
	return res
}

// DeleteMetadatum will delete the key-value pair with the given key for the given server ID.
func DeleteMetadatum(client *gophercloud.ServiceClient, id, key string) DeleteMetadatumResult {
	var res DeleteMetadatumResult
	_, res.Err = client.Delete(metadatumURL(client, id, key), &gophercloud.RequestOpts{
		JSONResponse: &res.Body,
	})
	return res
}

// Update allows routers to be updated. You can update the name, administrative
// state, and the external gateway. For more information about how to set the
// external gateway for a router, see Create. This operation does not enable
// the update of router interfaces. To do this, use the AddInterface and
// RemoveInterface functions.
func Update(c *gophercloud.ServiceClient, id string, opts UpdateOpts) UpdateResult {
	type router struct {
		Name         *string      `json:"name,omitempty"`
		AdminStateUp *bool        `json:"admin_state_up,omitempty"`
		GatewayInfo  *GatewayInfo `json:"external_gateway_info,omitempty"`
		Routes       []Route      `json:"routes"`
	}

	type request struct {
		Router router `json:"router"`
	}

	reqBody := request{Router: router{
		Name:         gophercloud.MaybeString(opts.Name),
		AdminStateUp: opts.AdminStateUp,
	}}

	if opts.GatewayInfo != nil {
		reqBody.Router.GatewayInfo = opts.GatewayInfo
	}

	if opts.Routes != nil {
		reqBody.Router.Routes = opts.Routes
	}

	// Send request to API
	var res UpdateResult
	_, res.Err = c.Put(resourceURL(c, id), reqBody, &res.Body, &gophercloud.RequestOpts{
		OkCodes: []int{200},
	})

	return res
}

// Copy is a function that copies one object to another.
func Copy(c *gophercloud.ServiceClient, containerName, objectName string, opts CopyOptsBuilder) CopyResult {
	var res CopyResult
	h := c.AuthenticatedHeaders()

	headers, err := opts.ToObjectCopyMap()
	if err != nil {
		res.Err = err
		return res
	}

	for k, v := range headers {
		h[k] = v
	}

	url := copyURL(c, containerName, objectName)
	resp, err := c.Request("COPY", url, gophercloud.RequestOpts{
		MoreHeaders: h,
		OkCodes:     []int{201},
	})
	if resp != nil {
		res.Header = resp.Header
	}
	res.Err = err
	return res
}

// Update is a function that creates, updates, or deletes an object's metadata.
func Update(c *gophercloud.ServiceClient, containerName, objectName string, opts UpdateOptsBuilder) UpdateResult {
	var res UpdateResult
	h := c.AuthenticatedHeaders()

	if opts != nil {
		headers, err := opts.ToObjectUpdateMap()
		if err != nil {
			res.Err = err
			return res
		}

		for k, v := range headers {
			h[k] = v
		}
	}

	url := updateURL(c, containerName, objectName)
	resp, err := c.Request("POST", url, gophercloud.RequestOpts{
		MoreHeaders: h,
	})
	if resp != nil {
		res.Header = resp.Header
	}
	res.Err = err
	return res
}

// Download is a function that retrieves the content and metadata for an object.
// To extract just the content, pass the DownloadResult response to the
// ExtractContent function.
func Download(c *gophercloud.ServiceClient, containerName, objectName string, opts DownloadOptsBuilder) DownloadResult {
	var res DownloadResult

	url := downloadURL(c, containerName, objectName)
	h := c.AuthenticatedHeaders()

	if opts != nil {
		headers, query, err := opts.ToObjectDownloadParams()
		if err != nil {
			res.Err = err
			return res
		}

		for k, v := range headers {
			h[k] = v
		}

		url += query
	}

	resp, err := c.Request("GET", url, gophercloud.RequestOpts{
		MoreHeaders: h,
		OkCodes:     []int{200, 304},
	})
	if resp != nil {
		res.Header = resp.Header
		res.Body = resp.Body
	}
	res.Err = err

	return res
}

// Create is a function that creates a new object or replaces an existing object.
func Create(c *gophercloud.ServiceClient, containerName, objectName string, content io.ReadSeeker, opts CreateOptsBuilder) CreateResult {
	var res CreateResult

	url := createURL(c, containerName, objectName)
	h := make(map[string]string)

	if opts != nil {
		headers, query, err := opts.ToObjectCreateParams()
		if err != nil {
			res.Err = err
			return res
		}

		for k, v := range headers {
			h[k] = v
		}

		url += query
	}

	ropts := gophercloud.RequestOpts{
		RawBody:     content,
		MoreHeaders: h,
	}

	resp, err := c.Request("PUT", url, ropts)
	if resp != nil {
		res.Header = resp.Header
	}
	res.Err = err
	return res
}

// Update is a function that creates, updates, or deletes an account's metadata.
// To extract the headers returned, call the Extract method on the UpdateResult.
func Update(c *gophercloud.ServiceClient, opts UpdateOptsBuilder) UpdateResult {
	var res UpdateResult
	h := make(map[string]string)

	if opts != nil {
		headers, err := opts.ToAccountUpdateMap()
		if err != nil {
			res.Err = err
			return res
		}
		for k, v := range headers {
			h[k] = v
		}
	}

	resp, err := c.Request("POST", updateURL(c), gophercloud.RequestOpts{
		MoreHeaders: h,
		OkCodes:     []int{201, 202, 204},
	})
	if resp != nil {
		res.Header = resp.Header
	}
	res.Err = err
	return res
}

// Get is a function that retrieves an account's metadata. To extract just the
// custom metadata, call the ExtractMetadata method on the GetResult. To extract
// all the headers that are returned (including the metadata), call the
// ExtractHeader method on the GetResult.
func Get(c *gophercloud.ServiceClient, opts GetOptsBuilder) GetResult {
	var res GetResult
	h := c.AuthenticatedHeaders()

	if opts != nil {
		headers, err := opts.ToAccountGetMap()
		if err != nil {
			res.Err = err
			return res
		}

		for k, v := range headers {
			h[k] = v
		}
	}

	resp, err := c.Request("HEAD", getURL(c), gophercloud.RequestOpts{
		MoreHeaders: h,
		OkCodes:     []int{204},
	})
	if resp != nil {
		res.Header = resp.Header
	}
	res.Err = err
	return res
}

// Delete deletes the interface with interfaceID attached to the instance with
// instanceID.
func Delete(c *gophercloud.ServiceClient, instanceID, interfaceID string) DeleteResult {
	var res DeleteResult
	_, res.Err = c.Request("DELETE", deleteURL(c, instanceID, interfaceID), gophercloud.RequestOpts{
		OkCodes: []int{200, 204},
	})
	return res
}

// Get requests details on a single server, by ID.
func Get(client *gophercloud.ServiceClient, id string) GetResult {
	var result GetResult
	_, result.Err = client.Get(getURL(client, id), &result.Body, &gophercloud.RequestOpts{
		OkCodes: []int{200, 203},
	})
	return result
}

// Delete will delete objects or containers in bulk.
func Delete(c *gophercloud.ServiceClient, opts DeleteOptsBuilder) DeleteResult {
	var res DeleteResult

	if opts == nil {
		return res
	}

	reqString, err := opts.ToBulkDeleteBody()
	if err != nil {
		res.Err = err
		return res
	}

	reqBody := strings.NewReader(reqString)

	resp, err := c.Request("DELETE", deleteURL(c), gophercloud.RequestOpts{
		MoreHeaders:  map[string]string{"Content-Type": "text/plain"},
		OkCodes:      []int{200},
		JSONBody:     reqBody,
		JSONResponse: &res.Body,
	})
	res.Header = resp.Header
	res.Err = err
	return res
}

// Metadatum requests the key-value pair with the given key for the given server ID.
func Metadatum(client *gophercloud.ServiceClient, id, key string) GetMetadatumResult {
	var res GetMetadatumResult
	_, res.Err = client.Request("GET", metadatumURL(client, id, key), gophercloud.RequestOpts{
		JSONResponse: &res.Body,
	})
	return res
}

// Revoke immediately makes specified token invalid.
func Revoke(c *gophercloud.ServiceClient, token string) RevokeResult {
	var res RevokeResult
	_, res.Err = c.Delete(tokenURL(c), &gophercloud.RequestOpts{
		MoreHeaders: subjectTokenHeaders(c, token),
	})
	return res
}

// Delete is the operation responsible for permanently deleting a VIP.
func Delete(c *gophercloud.ServiceClient, lbID, vipID int) DeleteResult {
	var res DeleteResult
	_, res.Err = c.Request("DELETE", resourceURL(c, lbID, vipID), gophercloud.RequestOpts{
		OkCodes: []int{202},
	})
	return res
}

// Delete implements image delete request
func Delete(client *gophercloud.ServiceClient, id string) DeleteResult {
	var res DeleteResult
	_, res.Err = client.Delete(deleteURL(client, id), &gophercloud.RequestOpts{
		OkCodes: []int{204},
	})
	return res
}