package tenantnetworks

import (
	"github.com/gophercloud/gophercloud"
	"github.com/gophercloud/gophercloud/pagination"
)

// A Network represents a network that a server communicates on.
type Network struct {
	// CIDR is the IPv4 subnet.
	CIDR string `json:"cidr"`

	// ID is the UUID of the network.
	ID string `json:"id"`

	// Name is the common name that the network has.
	Name string `json:"label"`
}

// NetworkPage stores a single page of all Networks results from a List call.
type NetworkPage struct {
	pagination.SinglePageBase
}

// IsEmpty determines whether or not a NetworkPage is empty.
func (page NetworkPage) IsEmpty() (bool, error) {
	if page.StatusCode == 204 {
		return true, nil
	}

	va, err := ExtractNetworks(page)
	return len(va) == 0, err
}

// ExtractNetworks interprets a page of results as a slice of Network.
func ExtractNetworks(r pagination.Page) ([]Network, error) {
	var s struct {
		Networks []Network `json:"networks"`
	}
	err := (r.(NetworkPage)).ExtractInto(&s)
	return s.Networks, err
}

type NetworkResult struct {
	gophercloud.Result
}

// Extract is a method that attempts to interpret any Network resource response
// as a Network struct.
func (r NetworkResult) Extract() (*Network, error) {
	var s struct {
		Network *Network `json:"network"`
	}
	err := r.ExtractInto(&s)
	return s.Network, err
}

// GetResult is the response from a Get operation. Call its Extract method to
// interpret it as a Network.
type GetResult struct {
	NetworkResult
}
