// Create is an operation which provisions a new security group with default
// security group rules for the IPv4 and IPv6 ether types.
func Create(c *gophercloud.ServiceClient, opts CreateOpts) CreateResult {
	var res CreateResult

	// Validate required opts
	if opts.Name == "" {
		res.Err = errNameRequired
		return res
	}

	type secgroup struct {
		Name        string `json:"name"`
		Description string `json:"description,omitempty"`
	}

	type request struct {
		SecGroup secgroup `json:"security_group"`
	}

	reqBody := request{SecGroup: secgroup{
		Name:        opts.Name,
		Description: opts.Description,
	}}

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

	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.Reader, opts CreateOptsBuilder) CreateResult {
	var res CreateResult

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

	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
	}

	contentType := h["Content-Type"]

	resp, err := perigee.Request("PUT", url, perigee.Options{
		ContentType: contentType,
		ReqBody:     content,
		MoreHeaders: h,
		OkCodes:     []int{201, 202},
	})
	res.Header = resp.HttpResponse.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 := perigee.Request("POST", url, perigee.Options{
		MoreHeaders: h,
		OkCodes:     []int{202},
	})
	res.Header = resp.HttpResponse.Header
	res.Err = err
	return res
}

// Update allows floating IP resources to be updated. Currently, the only way to
// "update" a floating IP is to associate it with a new internal port, or
// disassociated it from all ports. See UpdateOpts for instructions of how to
// do this.
func Update(c *gophercloud.ServiceClient, id string, opts UpdateOpts) UpdateResult {
	type floatingIP struct {
		PortID *string `json:"port_id"`
	}

	type request struct {
		FloatingIP floatingIP `json:"floatingip"`
	}

	var portID *string
	if opts.PortID == "" {
		portID = nil
	} else {
		portID = &opts.PortID
	}

	reqBody := request{FloatingIP: floatingIP{PortID: portID}}

	// 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
}

// 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 := perigee.Request("GET", url, perigee.Options{
		MoreHeaders: h,
		OkCodes:     []int{200},
	})

	res.Body = resp.HttpResponse.Body
	res.Err = err
	res.Header = resp.HttpResponse.Header

	return res
}

// AddInterface attaches a subnet to an internal router interface. You must
// specify either a SubnetID or PortID in the request body. If you specify both,
// the operation will fail and an error will be returned.
//
// If you specify a SubnetID, the gateway IP address for that particular subnet
// is used to create the router interface. Alternatively, if you specify a
// PortID, the IP address associated with the port is used to create the router
// interface.
//
// If you reference a port that is associated with multiple IP addresses, or
// if the port is associated with zero IP addresses, the operation will fail and
// a 400 Bad Request error will be returned.
//
// If you reference a port already in use, the operation will fail and a 409
// Conflict error will be returned.
//
// The PortID that is returned after using Extract() on the result of this
// operation can either be the same PortID passed in or, on the other hand, the
// identifier of a new port created by this operation. After the operation
// completes, the device ID of the port is set to the router ID, and the
// device owner attribute is set to `network:router_interface'.
func AddInterface(c *gophercloud.ServiceClient, id string, opts InterfaceOpts) InterfaceResult {
	var res InterfaceResult

	// Validate
	if (opts.SubnetID == "" && opts.PortID == "") || (opts.SubnetID != "" && opts.PortID != "") {
		res.Err = errInvalidInterfaceOpts
		return res
	}

	type request struct {
		SubnetID string `json:"subnet_id,omitempty"`
		PortID   string `json:"port_id,omitempty"`
	}

	body := request{SubnetID: opts.SubnetID, PortID: opts.PortID}

	_, res.Err = perigee.Request("PUT", addInterfaceURL(c, id), perigee.Options{
		MoreHeaders: c.AuthenticatedHeaders(),
		ReqBody:     &body,
		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
}

// Create accepts a CreateOpts struct and uses the values to create a new
// load balancer pool.
func Create(c *gophercloud.ServiceClient, opts CreateOpts) CreateResult {
	type pool struct {
		Name     string `json:"name"`
		TenantID string `json:"tenant_id,omitempty"`
		Protocol string `json:"protocol"`
		SubnetID string `json:"subnet_id"`
		LBMethod string `json:"lb_method"`
	}
	type request struct {
		Pool pool `json:"pool"`
	}

	reqBody := request{Pool: pool{
		Name:     opts.Name,
		TenantID: opts.TenantID,
		Protocol: opts.Protocol,
		SubnetID: opts.SubnetID,
		LBMethod: opts.LBMethod,
	}}

	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
}

// 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 := perigee.Request("DELETE", deleteURL(c), perigee.Options{
		ContentType: "text/plain",
		MoreHeaders: c.AuthenticatedHeaders(),
		OkCodes:     []int{200},
		ReqBody:     reqBody,
		Results:     &res.Body,
	})
	res.Header = resp.HttpResponse.Header
	res.Err = err
	return res
}

// See the CloudServersProvider interface for details.
func (gsp *genericServersProvider) CreateImage(id string, ci CreateImage) (string, error) {
	response, err := gsp.context.ResponseWithReauth(gsp.access, func() (*perigee.Response, error) {
		ep := fmt.Sprintf("%s/servers/%s/action", gsp.endpoint, id)
		return perigee.Request("POST", ep, perigee.Options{
			ReqBody: &struct {
				CreateImage *CreateImage `json:"createImage"`
			}{&ci},
			MoreHeaders: map[string]string{
				"X-Auth-Token": gsp.access.AuthToken(),
			},
			OkCodes: []int{200, 202},
		})
	})

	if err != nil {
		return "", err
	}
	location, err := response.HttpResponse.Location()
	if err != nil {
		return "", err
	}

	// Return the last element of the location which is the image id
	locationArr := strings.Split(location.Path, "/")
	return locationArr[len(locationArr)-1], err
}

// 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 = perigee.Request("PATCH", endpointURL(client, endpointID), perigee.Options{
		MoreHeaders: client.AuthenticatedHeaders(),
		ReqBody:     &reqBody,
		Results:     &result.Body,
		OkCodes:     []int{200},
	})
	return result
}

// Get requests details on a single server, by ID.
func Get(client *gophercloud.ServiceClient, id string) GetResult {
	var result GetResult
	_, result.Err = perigee.Request("GET", getURL(client, id), perigee.Options{
		Results:     &result.Body,
		MoreHeaders: client.AuthenticatedHeaders(),
	})
	return result
}

// Revoke immediately makes specified token invalid.
func Revoke(c *gophercloud.ServiceClient, token string) RevokeResult {
	var res RevokeResult
	_, res.Err = perigee.Request("DELETE", tokenURL(c), perigee.Options{
		MoreHeaders: subjectTokenHeaders(c, token),
		OkCodes:     []int{204},
	})
	return res
}

// DisassociateMonitor will disassociate a health monitor with a particular
// pool. When dissociation is successful, the health monitor will no longer
// check for the health of the members of the pool.
func DisassociateMonitor(c *gophercloud.ServiceClient, poolID, monitorID string) AssociateResult {
	var res AssociateResult
	_, res.Err = perigee.Request("DELETE", disassociateURL(c, poolID, monitorID), perigee.Options{
		MoreHeaders: c.AuthenticatedHeaders(),
		OkCodes:     []int{204},
	})
	return res
}

// Delete removes an endpoint from the service catalog.
func Delete(client *gophercloud.ServiceClient, endpointID string) DeleteResult {
	var res DeleteResult
	_, res.Err = perigee.Request("DELETE", endpointURL(client, endpointID), perigee.Options{
		MoreHeaders: client.AuthenticatedHeaders(),
		OkCodes:     []int{204},
	})
	return res
}

// Delete will permanently delete a particular router based on its unique ID.
func Delete(c *gophercloud.ServiceClient, id string) DeleteResult {
	var res DeleteResult
	_, res.Err = perigee.Request("DELETE", resourceURL(c, id), perigee.Options{
		MoreHeaders: c.AuthenticatedHeaders(),
		OkCodes:     []int{204},
	})
	return res
}

// Get returns additional information about a service, given its ID.
func Get(client *gophercloud.ServiceClient, serviceID string) GetResult {
	var result GetResult
	_, result.Err = perigee.Request("GET", serviceURL(client, serviceID), perigee.Options{
		MoreHeaders: client.AuthenticatedHeaders(),
		Results:     &result.Body,
		OkCodes:     []int{200},
	})
	return result
}

// Update requests that various attributes of the indicated server be changed.
func Update(client *gophercloud.ServiceClient, id string, opts UpdateOptsBuilder) UpdateResult {
	var result UpdateResult
	_, result.Err = perigee.Request("PUT", updateURL(client, id), perigee.Options{
		Results:     &result.Body,
		ReqBody:     opts.ToServerUpdateMap(),
		MoreHeaders: client.AuthenticatedHeaders(),
	})
	return result
}

// Get retrieves a particular router based on its unique ID.
func Get(c *gophercloud.ServiceClient, id string) GetResult {
	var res GetResult
	_, res.Err = perigee.Request("GET", resourceURL(c, id), perigee.Options{
		MoreHeaders: c.AuthenticatedHeaders(),
		Results:     &res.Body,
		OkCodes:     []int{200},
	})
	return res
}

// Get is a function that retrieves the metadata of a container. To extract just
// the custom metadata, pass the GetResult response to the ExtractMetadata
// function.
func Get(c *gophercloud.ServiceClient, containerName string) GetResult {
	var res GetResult
	resp, err := perigee.Request("HEAD", getURL(c, containerName), perigee.Options{
		MoreHeaders: c.AuthenticatedHeaders(),
		OkCodes:     []int{200, 204},
	})
	res.Header = resp.HttpResponse.Header
	res.Err = err
	return res
}