package netboxgo

import (
	"bytes"
	"crypto/tls"
	"encoding/json"

	//	"fmt"
	"io/ioutil"
	"net/http"
	"net/url"
	"time"

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

// DcimInterfacesCreate is used for the return values from Netbox API dcim_interfaces_create
type DcimInterfacesCreate struct {
	Device           int    `json:"device"`
	Name             string `json:"name"`
	Type             int    `json:"type,omitempty"`
	Enabled          bool   `json:"enabled,omitempty"`
	Lag              int    `json:"lag,omitempty"`
	Mtu              int    `json:"mtu,omitempty"`
	MacAddress       string `json:"mac_address,omitempty"`
	MgmtOnly         bool   `json:"mgmt_only,omitempty"`
	Description      string `json:"description,omitempty"`
	ConnectionStatus bool   `json:"connection_status,omitempty"`
	Cable            struct {
		Label string `json:"label,omitempty"`
	} `json:"cable,omitempty"`
	Mode         int      `json:"mode,omitempty"`
	UntaggedVLAN int      `json:"untagged_vlan,omitempty"`
	TaggedVLANs  []int    `json:"tagged_vlans,omitempty"`
	Tags         []string `json:"tags,omitempty"`
}

// DcimInterfacesList is used for the return value from NetBox API dcim_interfaces_list
type DcimInterfacesList struct {
	Count    int         `json:"count,omitempty"`
	Next     interface{} `json:"next,omitempty"`
	Previous interface{} `json:"previous,omitempty"`
	Results  []struct {
		ID     int `json:"id,omitempty"`
		Device struct {
			ID          int    `json:"id,omitempty"`
			URL         string `json:"url,omitempty"`
			Name        string `json:"name,omitempty"`
			DisplayName string `json:"display_name,omitempty"`
		} `json:"device,omitempty"`
		Name string `json:"name,omitempty"`
		Type struct {
			Value int    `json:"value,omitempty"`
			Label string `json:"label,omitempty"`
		} `json:"type,omitempty"`
		FormFactor struct {
			Value int    `json:"value,omitempty"`
			Label string `json:"label,omitempty"`
		} `json:"form_factor,omitempty"`
		Enabled bool `json:"enabled,omitempty"`
		Lag     struct {
			ID     int    `json:"id,omitempty"`
			URL    string `json:"url,omitempty"`
			Device struct {
				ID          int    `json:"id,omitempty"`
				URL         string `json:"url,omitempty"`
				Name        string `json:"name,omitempty"`
				DisplayName string `json:"display_name,omitempty"`
			} `json:"device,omitempty"`
			Name             string      `json:"name,omitempty"`
			Cable            interface{} `json:"cable,omitempty"`
			ConnectionStatus interface{} `json:"connection_status,omitempty"`
		} `json:"lag,omitempty"`
		Mtu                   interface{}   `json:"mtu,omitempty"`
		MacAddress            interface{}   `json:"mac_address,omitempty"`
		MgmtOnly              bool          `json:"mgmt_only,omitempty"`
		Description           string        `json:"description,omitempty"`
		ConnectedEndpointType interface{}   `json:"connected_endpoint_type,omitempty"`
		ConnectedEndpoint     interface{}   `json:"connected_endpoint,omitempty"`
		ConnectionStatus      interface{}   `json:"connection_status,omitempty"`
		Cable                 interface{}   `json:"cable,omitempty"`
		Mode                  interface{}   `json:"mode,omitempty"`
		UntaggedVLAN          interface{}   `json:"untagged_vlan,omitempty"`
		TaggedVLANs           []interface{} `json:"tagged_vlans,omitempty"`
		Tags                  []interface{} `json:"tags,omitempty"`
		CountIpaddresses      int           `json:"count_ipaddresses,omitempty"`
	} `json:"results,omitempty"`
}

// InterfaceFilter is used to filter out returned object from Netbox API dcim_interfaces_list
type InterfaceFilter struct {
	Offset int64 `schema:"offset,omitempty"`
	Limit  int64 `schema:"limit,omitempty"`

	//User specific filters
	ID               string `schema:"id,omitempty"`
	Name             string `schema:"name,omitempty"`
	ConnectionStatus string `schema:"connection_status,omitempty"`
	Type             string `schema:"type,omitempty"`
	Mtu              string `schema:"mtu,omitempty"`
	MgmtOnly         string `schema:"mgmt_only,omitempty"`
	Mode             string `schema:"mode,omitempty"`
	Description      string `schema:"description,omitempty"`
	Q                string `schema:"q,omitempty"`
	Device           string `schema:"device,omitempty"`
	DeviceID         string `schema:"device_id,omitempty"`
	Cabled           string `schema:"cabled,omitempty"`
	Kind             string `schema:"kind,omitempty"`
	LagID            string `schema:"lag_id,omitempty"`
	MacAddress       string `schema:"mac_address,omitempty"`
	Tag              string `schema:"tag,omitempty"`
	VLANID           string `schema:"vlan_id,omitempty"`
	VLAN             string `schema:"vlan,omitempty"`
}

// ListInterfaces returns Netbox dcim_interfaces_list
func (n *NetBox) ListInterfaces(i *DcimInterfacesList, f *InterfaceFilter) error {
	var encoder = schema.NewEncoder()

	form := url.Values{}
	err := encoder.Encode(f, form)
	if err != nil {
		return err
	}
	query := form.Encode()

	transport := &http.Transport{
		TLSClientConfig: &tls.Config{InsecureSkipVerify: n.InsecureSkipVerify},
	}
	timeout := time.Duration(60 * time.Second)
	client := &http.Client{
		Timeout:   timeout,
		Transport: transport,
	}
	request, err := http.NewRequest("GET", n.RootURL+"/api/dcim/interfaces/?"+query, 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\n", response.StatusCode, http.StatusOK)
	}

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

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

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

// CreateInterfaces creates interfaces via Netbox API dcim_interfaces_create
func (n *NetBox) CreateInterfaces(i *DcimInterfacesCreate) error {
	interfaceData, err := json.Marshal(i)
	if err != nil {
		return err
	}
	transport := &http.Transport{
		TLSClientConfig: &tls.Config{InsecureSkipVerify: n.InsecureSkipVerify},
	}
	timeout := time.Duration(60 * time.Second)
	client := &http.Client{
		Timeout:   timeout,
		Transport: transport,
	}
	request, err := http.NewRequest("POST", n.RootURL+"/api/dcim/interfaces/", bytes.NewBuffer(interfaceData))
	if err != nil {
		return err
	}
	request.Header.Add("Accept", "application/json")
	request.Header.Add("Content-Type", "application/json")
	request.Header.Add("Authorization", " Token "+n.Token)
	response, err := client.Do(request)
	if err != nil {
		return err
	}
	err = response.Body.Close()
	if err != nil {
		return err
	}

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