package netboxgo

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

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

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

// IpamVLANsCreate is used for the return values from Netbox API ipam_vlans_create
type IpamVLANsCreate struct {
	Site         int      `json:"site"`
	Group        int      `json:"group"`
	Vid          int      `json:"vid"`
	Name         string   `json:"name"`
	Tenant       int      `json:"tenant"`
	Status       int      `json:"status"`
	Role         int      `json:"role"`
	Description  string   `json:"description"`
	Tags         []string `json:"tags"`
	CustomFields struct {
	} `json:"custom_fields"`
}

// IpamVLANsList is used for the return value from NetBox API ipam_vlans_list
type IpamVLANsList struct {
	Count    int    `json:"count"`
	Next     string `json:"next"`
	Previous string `json:"previous"`
	Results  []struct {
		ID   int `json:"id"`
		Site struct {
			ID   int    `json:"id"`
			URL  string `json:"url"`
			Name string `json:"name"`
			Slug string `json:"slug"`
		} `json:"site"`
		Group struct {
			ID        int    `json:"id"`
			URL       string `json:"url"`
			Name      string `json:"name"`
			Slug      string `json:"slug"`
			VLANCount int    `json:"vlan_count"`
		} `json:"group"`
		Vid    int    `json:"vid"`
		Name   string `json:"name"`
		Tenant struct {
			ID   int    `json:"id"`
			URL  string `json:"url"`
			Name string `json:"name"`
			Slug string `json:"slug"`
		} `json:"tenant"`
		Status struct {
			Label string `json:"label"`
			Value int    `json:"value"`
		} `json:"status"`
		Role struct {
			ID          int    `json:"id"`
			URL         string `json:"url"`
			Name        string `json:"name"`
			Slug        string `json:"slug"`
			PrefixCount int    `json:"prefix_count"`
			VLANCount   int    `json:"vlan_count"`
		} `json:"role"`
		Description  string   `json:"description"`
		Tags         []string `json:"tags"`
		DisplayName  string   `json:"display_name"`
		CustomFields struct {
		} `json:"custom_fields"`
		Created     string    `json:"created"`
		LastUpdated time.Time `json:"last_updated"`
		PrefixCount int       `json:"prefix_count"`
	} `json:"results"`
}

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

	//User specific filters
	Vid           string `schema:"vid,omitempty"`
	Name          string `schema:"name,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"`
	SiteID        string `schema:"site_id,omitempty"`
	Site          string `schema:"site,omitempty"`
	GroupID       string `schema:"group_id,omitempty"`
	Group         string `schema:"group,omitempty"`
	RoleID        string `schema:"role_id,omitempty"`
	Role          string `schema:"role,omitempty"`
	Status        string `schema:"status,omitempty"`
	Tag           string `schema:"tag,omitempty"`
}

// ListVLANs returns Netbox ipam_vlans_list
func (n *NetBox) ListVLANs(i *IpamVLANsList, f *VLANFilter) 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/ipam/vlans/?"+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
}

// CreateVLANs creates interfaces via Netbox API ipam_vlans_create
func (n *NetBox) CreateVLANs(i *IpamVLANsCreate) error {
	vrfData, 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/ipam/vlans/", bytes.NewBuffer(vrfData))
	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)
}