package netboxgo

import (
	"crypto/tls"
	"encoding/json"
	"io/ioutil"
	"net/http"
	"net/url"
	"time"

	"github.com/gorilla/schema"
	"github.com/pkg/errors"
)

type ListDeviceRoles struct {
	Count    int          `json:"count"`
	Next     string       `json:"next"`
	Previous string       `json:"previous"`
	Results  []DeviceRole `json:"results"`
}

type DeviceRole struct {
	ID                  int    `json:"id"`
	URL                 string `json:"url"`
	Name                string `json:"name"`
	Slug                string `json:"slug"`
	Color               string `json:"color"`
	VMRole              bool   `json:"vm_role"`
	Description         string `json:"description"`
	DeviceCount         int    `json:"device_count"`
	VirtualmachineCount int    `json:"virtualmachine_count"`
}

// DeviceTypeFilter is used to filter dcim_device_roles query to the Netbox API
type DeviceRoleFilter struct {
	Offset int64 `schema:"offset,omitempty"`
	Limit  int64 `schema:"limit,omitempty"`

	// User specific filters
	ID     string `schema:"id,omitempty"`
	Name   string `schema:"name,omitempty"`
	Slug   string `schema:"slug,omitempty"`
	Color  string `schema:"color,omitempty"`
	VMRole string `schema:"vm_role,omitempty"`
	Q      string `schema:"q,omitempty"`
}

// ListDeviceTypes method returns dcim_device_roles from Netbox API
func (n *NetBox) ListDeviceRoles(d *ListDeviceRoles, f *DeviceRoleFilter) error {
	encoder := schema.NewEncoder()

	transport := &http.Transport{
		TLSClientConfig: &tls.Config{InsecureSkipVerify: n.InsecureSkipVerify},
	}
	timeout := time.Duration(60 * time.Second)
	client := &http.Client{
		Timeout:   timeout,
		Transport: transport,
	}
	deviceurl := n.RootURL + "/api/dcim/device-roles/"
	if f != nil {
		form := url.Values{}
		err := encoder.Encode(f, form)
		if err != nil {
			return err
		}
		query := form.Encode()
		deviceurl = deviceurl + "?" + query
	}
	var request *http.Request
	var err error
	request, err = http.NewRequest("GET", deviceurl, nil)
	if err != nil {
		return err
	}
	request.Header.Add("Accept", "application/json")
	request.Header.Add("Authorization", " Token "+n.Token)
	response, err := client.Do(request)
	if err != nil {
		return err
	}

	if response.StatusCode != http.StatusOK {
		return errors.Errorf("Error: response was: %d should be %d (%s)\n", response.StatusCode, http.StatusOK, deviceurl)
	}

	data, err := ioutil.ReadAll(response.Body)
	if err != nil {
		return err
	}

	err = response.Body.Close()
	if err != nil {
		return err
	}

	err = json.Unmarshal(data, &d)
	if err != nil {
		return err
	}
	return nil
}