package netboxgo

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

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

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

// IpamPrefixesCreate is used for the return values from Netbox API ipam_prefixes_create
type IpamPrefixesCreate struct {
	Prefix       string   `json:"prefix"`
	Site         int      `json:"site"`
	Vrf          int      `json:"vrf"`
	Tenant       int      `json:"tenant"`
	VLAN         int      `json:"vlan"`
	Status       int      `json:"status"`
	Role         int      `json:"role"`
	IsPool       bool     `json:"is_pool"`
	Description  string   `json:"description"`
	Tags         []string `json:"tags"`
	CustomFields struct {
	} `json:"custom_fields"`
}

// IpamPrefixesList is used for the return value from NetBox API ipam_prefixes_list
type IpamPrefixesList struct {
	Count    int    `json:"count"`
	Next     string `json:"next"`
	Previous string `json:"previous"`
	Results  []struct {
		ID     int `json:"id"`
		Family struct {
			Label string `json:"label"`
			Value int    `json:"value"`
		} `json:"family"`
		Prefix string `json:"prefix"`
		Site   struct {
			ID   int    `json:"id"`
			URL  string `json:"url"`
			Name string `json:"name"`
			Slug string `json:"slug"`
		} `json:"site"`
		Vrf struct {
			ID          int    `json:"id"`
			URL         string `json:"url"`
			Name        string `json:"name"`
			Rd          string `json:"rd"`
			PrefixCount int    `json:"prefix_count"`
		} `json:"vrf"`
		Tenant struct {
			ID   int    `json:"id"`
			URL  string `json:"url"`
			Name string `json:"name"`
			Slug string `json:"slug"`
		} `json:"tenant"`
		VLAN struct {
			ID          int    `json:"id"`
			URL         string `json:"url"`
			Vid         int    `json:"vid"`
			Name        string `json:"name"`
			DisplayName string `json:"display_name"`
		} `json:"vlan"`
		Status struct {
			Label string `json:"label"`
			Value string `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"`
		IsPool      bool   `json:"is_pool"`
		Description string `json:"description"`
		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"`
	} `json:"results"`
}

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

	// User specific filters
	Family        string `schema:"family,omitempty"`
	IsPool        string `schema:"is_pool,omitempty"`
	EnforceUnique string `schema:"enforce_unique,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"`
	Tag           string `schema:"tag,omitempty"`
	Prefix        string `schema:"prefix,omitempty"`
	Within        string `schema:"within,omitempty"`
	WithinInclude string `schema:"within_include,omitempty"`
	Contains      string `schema:"contains,omitempty"`
	MaskLength    string `schema:"mask_length,omitempty"`
	VrfID         string `schema:"vrf_id,omitempty"`
	Vrf           string `schema:"vrf,omitempty"`
	RegionID      string `schema:"region_id,omitempty"`
	Region        string `schema:"region,omitempty"`
	SiteID        string `schema:"site_id,omitempty"`
	Site          string `schema:"site,omitempty"`
	VLANID        string `schema:"vlan_id,omitempty"`
	Role          string `schema:"role,omitempty"`
	Status        string `schema:"status,omitempty"`
}

// ListPrefixes returns Netbox ipam_prefixes_list
func (n *NetBox) ListPrefixes(i *IpamPrefixesList, f *PrefixFilter) error {
	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/prefixes/?"+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
}

// CreatePrefixes creates interfaces via Netbox API ipam_prefixes_create
func (n *NetBox) CreatePrefixes(i *IpamPrefixesCreate) 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/prefixes/", 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)
}