package netboxgo

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

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

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

type DeviceType struct {
	ID           int    `json:"id"`
	URL          string `json:"url"`
	Manufacturer struct {
		ID              int    `json:"id"`
		URL             string `json:"url"`
		Name            string `json:"name"`
		Slug            string `json:"slug"`
		DevicetypeCount int    `json:"devicetype_count"`
	} `json:"manufacturer"`
	Model         string `json:"model"`
	Slug          string `json:"slug"`
	DisplayName   string `json:"display_name"`
	PartNumber    string `json:"part_number"`
	UHeight       int    `json:"u_height"`
	IsFullDepth   bool   `json:"is_full_depth"`
	SubdeviceRole struct {
		Label string `json:"label"`
		Value string `json:"value"`
	} `json:"subdevice_role"`
	FrontImage string `json:"front_image"`
	RearImage  string `json:"rear_image"`
	Comments   string `json:"comments"`
	Tags       []struct {
		ID    int    `json:"id"`
		URL   string `json:"url"`
		Name  string `json:"name"`
		Slug  string `json:"slug"`
		Color string `json:"color"`
	} `json:"tags"`
	CustomFields struct {
	} `json:"custom_fields"`
	Created     string    `json:"created"`
	LastUpdated time.Time `json:"last_updated"`
	DeviceCount int       `json:"device_count"`
}

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

	// User specific filters
	ID          string `schema:"id,omitempty"`
	Model       string `schema:"model,omitempty"`
	Slug        string `schema:"slug,omitempty"`
	PartNumber  string `schema:"part_number,omitempty"`
	AssetTag    string `schema:"asset_tag,omitempty"`
	UHeight     string `schema:"u_height,omitempty"`
	IsFullDepth string `schema:"is_full_depth,omitempty"`
	Tag         string `schema:"tag,omitempty"`
}

// ListDeviceTypes method returns dcim_device_types_list from Netbox API
func (n *NetBox) ListDeviceTypes(d *ListDeviceTypes, f *DeviceTypeFilter) 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-types/"
	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
}