package netboxgo

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

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

// DcimDevicesList is used for Netbox dcim_device_list return struct
type DcimDevicesList struct {
	Count    int    `json:"count"`
	Next     string `json:"next"`
	Previous string `json:"previous"`
	Results  []struct {
		ID          int    `json:"id"`
		Name        string `json:"name"`
		DisplayName string `json:"display_name"`
		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"`
			DeviceCount int    `json:"device_count"`
		} `json:"device_type"`
		DeviceRole struct {
			ID                  int    `json:"id"`
			URL                 string `json:"url"`
			Name                string `json:"name"`
			Slug                string `json:"slug"`
			DeviceCount         int    `json:"device_count"`
			VirtualmachineCount int    `json:"virtualmachine_count"`
		} `json:"device_role"`
		Tenant struct {
			ID   int    `json:"id"`
			URL  string `json:"url"`
			Name string `json:"name"`
			Slug string `json:"slug"`
		} `json:"tenant"`
		Platform struct {
			ID                  int    `json:"id"`
			URL                 string `json:"url"`
			Name                string `json:"name"`
			Slug                string `json:"slug"`
			DeviceCount         int    `json:"device_count"`
			VirtualmachineCount int    `json:"virtualmachine_count"`
		} `json:"platform"`
		Serial   string `json:"serial"`
		AssetTag string `json:"asset_tag"`
		Site     struct {
			ID   int    `json:"id"`
			URL  string `json:"url"`
			Name string `json:"name"`
			Slug string `json:"slug"`
		} `json:"site"`
		Rack struct {
			ID          int    `json:"id"`
			URL         string `json:"url"`
			Name        string `json:"name"`
			DisplayName string `json:"display_name"`
			DeviceCount int    `json:"device_count"`
		} `json:"rack"`
		Position int `json:"position"`
		Face     struct {
			Label string `json:"label"`
			Value string `json:"value"`
		} `json:"face"`
		ParentDevice struct {
			ID          int    `json:"id"`
			URL         string `json:"url"`
			Name        string `json:"name"`
			DisplayName string `json:"display_name"`
		} `json:"parent_device"`
		Status struct {
			Label string `json:"label"`
			Value string `json:"value"`
		} `json:"status"`
		PrimaryIP struct {
			ID      int    `json:"id"`
			URL     string `json:"url"`
			Family  int    `json:"family"`
			Address string `json:"address"`
		} `json:"primary_ip"`
		PrimaryIP4 struct {
			ID      int    `json:"id"`
			URL     string `json:"url"`
			Family  int    `json:"family"`
			Address string `json:"address"`
		} `json:"primary_ip4"`
		PrimaryIP6 struct {
			ID      int    `json:"id"`
			URL     string `json:"url"`
			Family  int    `json:"family"`
			Address string `json:"address"`
		} `json:"primary_ip6"`
		Cluster struct {
			ID                  int    `json:"id"`
			URL                 string `json:"url"`
			Name                string `json:"name"`
			VirtualmachineCount int    `json:"virtualmachine_count"`
		} `json:"cluster"`
		VirtualChassis struct {
			ID     int    `json:"id"`
			URL    string `json:"url"`
			Master struct {
				ID          int    `json:"id"`
				URL         string `json:"url"`
				Name        string `json:"name"`
				DisplayName string `json:"display_name"`
			} `json:"master"`
			MemberCount int `json:"member_count"`
		} `json:"virtual_chassis"`
		VcPosition int    `json:"vc_position"`
		VcPriority int    `json:"vc_priority"`
		Comments   string `json:"comments"`
		//	LocalContextData string   `json:"local_context_data"`
		Tags         []string `json:"tags"`
		CustomFields struct {
		} `json:"custom_fields"`
		ConfigContext struct {
			AdditionalProp1 string `json:"additionalProp1"`
			AdditionalProp2 string `json:"additionalProp2"`
			AdditionalProp3 string `json:"additionalProp3"`
		} `json:"config_context"`
		Created     string    `json:"created"`
		LastUpdated time.Time `json:"last_updated"`
	} `json:"results"`
}

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

	//User specific filters
	ID                  string `schema:"id,omitempty"`
	Name                string `schema:"name,omitempty"`
	AssetTag            string `schema:"asset_tag,omitempty"`
	Face                string `schema:"face,omitempty"`
	Position            string `schema:"position,omitempty"`
	VcPosition          string `schema:"vc_position,omitempty"`
	VcPriority          string `schema:"vc_priority,omitempty"`
	TenantGroupID       string `schema:"tenant_group_id,omitempty"`
	TenantGroup         string `schema:"tenant_group,omitempty"`
	TenantID            string `schema:"tenant_id,omitempty"`
	Tenant              string `schema:"tenant,omitempty"`
	IDIn                string `schema:"id__in,omitempty"`
	Q                   string `schema:"q,omitempty"`
	ManufacturerID      string `schema:"manufacturer_id,omitempty"`
	Manufacturer        string `schema:"manufacturer,omitempty"`
	DeviceTypeID        string `schema:"device_type_id,omitempty"`
	RoleID              string `schema:"role_id,omitempty"`
	Role                string `schema:"role,omitempty"`
	RegionID            string `schema:"region_id,omitempty"`
	Region              string `schema:"region,omitempty"`
	SiteID              string `schema:"site_id,omitempty"`
	Site                string `schema:"site,omitempty"`
	RackGroupID         string `schema:"rack_group_id,omitempty"`
	RackID              string `schema:"rack_id,omitempty"`
	ClusterID           string `schema:"cluster_id,omitempty"`
	Model               string `schema:"model,omitempty"`
	Status              string `schema:"status,omitempty"`
	IsfullDepth         string `schema:"is_full_depth,omitempty"`
	MacAddress          string `schema:"mac_address,omitempty"`
	Serial              string `schema:"serial,omitempty"`
	HasPrimaryIP        string `schema:"has_primary_ip,omitempty"`
	VirtualChassiID     string `schema:"virtual_chassis_id,omitempty"`
	VirtualChassiMember string `schema:"virtual_chassis_member,omitempty"`
	ConsolePorts        string `schema:"console_ports,omitempty"`
	ConsoleServerPorts  string `schema:"console_server_ports,omitempty"`
	PowerPorts          string `schema:"power_ports,omitempty"`
	PowerOutlets        string `schema:"power_outlets,omitempty"`
	Interfaces          string `schema:"interfaces,omitempty"`
	PassThroughPorts    string `schema:"pass_through_ports,omitempty"`
	Tag                 string `schema:"tag,omitempty"`
}

// ListDevices method returns dcim_device_list from Netbox API
func (n *NetBox) ListDevices(d *DcimDevicesList, f *DeviceFilter) error {
	var 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/devices/"
	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
}