package main

import (
	"net/http"
	"net/url"

	"github.com/gorilla/mux"

	"github.com/lxc/lxd/lxd/resources"
	"github.com/lxc/lxd/lxd/response"
	storagePools "github.com/lxc/lxd/lxd/storage"
	"github.com/lxc/lxd/shared/api"
)

var api10ResourcesCmd = APIEndpoint{
	Path: "resources",

	Get: APIEndpointAction{Handler: api10ResourcesGet, AccessHandler: allowAuthenticated},
}

var storagePoolResourcesCmd = APIEndpoint{
	Path: "storage-pools/{name}/resources",

	Get: APIEndpointAction{Handler: storagePoolResourcesGet, AccessHandler: allowAuthenticated},
}

// swagger:operation GET /1.0/resources server resources_get
//
// Get system resources information
//
// Gets the hardware information profile of the LXD server.
//
// ---
// produces:
//   - application/json
// parameters:
//   - in: query
//     name: target
//     description: Cluster member name
//     type: string
//     example: lxd01
// responses:
//   "200":
//     description: Hardware resources
//     schema:
//       type: object
//       description: Sync response
//       properties:
//         type:
//           type: string
//           description: Response type
//           example: sync
//         status:
//           type: string
//           description: Status description
//           example: Success
//         status_code:
//           type: integer
//           description: Status code
//           example: 200
//         metadata:
//           $ref: "#/definitions/Resources"
//   "403":
//     $ref: "#/responses/Forbidden"
//   "500":
//     $ref: "#/responses/InternalServerError"
func api10ResourcesGet(d *Daemon, r *http.Request) response.Response {
	// If a target was specified, forward the request to the relevant node.
	resp := forwardedResponseIfTargetIsRemote(d, r)
	if resp != nil {
		return resp
	}

	// Get the local resource usage
	res, err := resources.GetResources()
	if err != nil {
		return response.SmartError(err)
	}

	return response.SyncResponse(true, res)
}

// swagger:operation GET /1.0/storage-pools/{name}/resources storage storage_pool_resources
//
// Get storage pool resources information
//
// Gets the usage information for the storage pool.
//
// ---
// produces:
//   - application/json
// parameters:
//   - in: query
//     name: target
//     description: Cluster member name
//     type: string
//     example: lxd01
// responses:
//   "200":
//     description: Hardware resources
//     schema:
//       type: object
//       description: Sync response
//       properties:
//         type:
//           type: string
//           description: Response type
//           example: sync
//         status:
//           type: string
//           description: Status description
//           example: Success
//         status_code:
//           type: integer
//           description: Status code
//           example: 200
//         metadata:
//           $ref: "#/definitions/ResourcesStoragePool"
//   "403":
//     $ref: "#/responses/Forbidden"
//   "500":
//     $ref: "#/responses/InternalServerError"
func storagePoolResourcesGet(d *Daemon, r *http.Request) response.Response {
	// If a target was specified, forward the request to the relevant node.
	resp := forwardedResponseIfTargetIsRemote(d, r)
	if resp != nil {
		return resp
	}

	// Get the existing storage pool
	poolName, err := url.PathUnescape(mux.Vars(r)["name"])
	if err != nil {
		return response.SmartError(err)
	}

	var res *api.ResourcesStoragePool

	pool, err := storagePools.LoadByName(d.State(), poolName)
	if err != nil {
		return response.InternalError(err)
	}

	res, err = pool.GetResources()
	if err != nil {
		return response.InternalError(err)
	}

	return response.SyncResponse(true, res)
}
