package netboxgo

import (
	"context"
	"fmt"
	"net/http"
	"net/url"
	"time"

	"github.com/gorilla/schema"
)

type VLANsService service

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

type VLAN struct {
	LastUpdated  time.Time   `json:"last_updated"`
	CustomFields interface{} `json:"custom_fields"`
	Site         struct {
		URL  string `json:"url"`
		Name string `json:"name"`
		Slug string `json:"slug"`
		ID   int    `json:"id"`
	} `json:"site"`
	Tenant struct {
		URL  string `json:"url"`
		Name string `json:"name"`
		Slug string `json:"slug"`
		ID   int    `json:"id"`
	} `json:"tenant"`
	Status struct {
		Label string `json:"label"`
		Value string `json:"value"`
	} `json:"status"`
	Description string `json:"description"`
	Name        string `json:"name"`
	Created     string `json:"created"`
	DisplayName string `json:"display_name"`
	Group       struct {
		URL       string `json:"url"`
		Name      string `json:"name"`
		Slug      string `json:"slug"`
		ID        int    `json:"id"`
		VLANCount int    `json:"vlan_count"`
	} `json:"group"`
	Tags []string `json:"tags"`
	Role struct {
		URL         string `json:"url"`
		Name        string `json:"name"`
		Slug        string `json:"slug"`
		ID          int    `json:"id"`
		PrefixCount int    `json:"prefix_count"`
		VLANCount   int    `json:"vlan_count"`
	} `json:"role"`
	ID          int `json:"id"`
	Vid         int `json:"vid"`
	PrefixCount int `json:"prefix_count"`
}

// IpamVLANsList is used for the return value from NetBox API ipam_vlans_list
type VLANs struct {
	Next     string `json:"next"`
	Previous string `json:"previous"`
	Results  []VLAN `json:"results"`
	Count    int    `json:"count"`
}

// VLANFilter is used to filter out returned object from Netbox API ipam_vlans_list
type VLANFilter struct {
	// 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"`

	Offset int `schema:"offset,omitempty"`
	Limit  int `schema:"limit,omitempty"`
}

const vlansPath = ipamPath + "/vlans"

// List vlans. VLANFilter is used to list based on filter queries.
func (s *VLANsService) List(ctx context.Context, f *VLANFilter) (*VLANs, error) {
	var vlans VLANs
	var query string
	var req *http.Request
	var err error

	encoder := schema.NewEncoder()

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

	req, err = s.client.newRequest(ctx, "GET", vlansPath, query, nil)
	if err != nil {
		return &vlans, err
	}

	_, err = s.client.do(req, &vlans)
	if err != nil {
		return &vlans, err
	}

	return &vlans, nil
}

// ListAll vlans. VLANFilter is used to filter list all based on filters
func (s *VLANsService) ListAll(ctx context.Context, f *VLANFilter) (*VLANs, error) {
	var all VLANs
	var v *VLANs
	var numVlans int
	var err error

	f.Limit = 1
	v, err = s.List(ctx, f)
	if err != nil {
		return &all, fmt.Errorf("unable to count vlans with filter %+v: %w", f, err)
	}
	numVlans = v.Count

	for count := 0; count < numVlans; count += 1000 {
		f.Limit = 1000
		f.Offset = count

		v, err = s.List(ctx, f)
		if err != nil {
			return &all, fmt.Errorf("unable to list vlans with filter %+v: %w", f, err)
		}

		all.Results = append(all.Results, v.Results...)
	}

	return &all, nil
}

// Create a device
func (s *VLANsService) Create(ctx context.Context, c *NewDevice) error {
	var err error
	var req *http.Request

	req, err = s.client.newRequest(ctx, "POST", vlansPath, "", c)
	if err != nil {
		return fmt.Errorf("unable to create request: %w", err)
	}

	_, err = s.client.do(req, nil)
	if err != nil {
		return fmt.Errorf("unable to do request: %w", err)
	}

	return nil
}

// // Update a device
// func (s *VLANsService) Update(ctx context.Context, id string, c *UpdateVLAN) error {
// 	var req *http.Request
// 	var err error

// 	path := fmt.Sprintf("%s/%s", vlansPath, id)

// 	req, err = s.client.newRequest(ctx, "PATCH", path, "", c)
// 	if err != nil {
// 		return fmt.Errorf("unable to create request: %w", err)
// 	}

// 	_, err = s.client.do(req, nil)
// 	if err != nil {
// 		return fmt.Errorf("unable to do request: %w", err)
// 	}

// 	return nil
// }