package linodego

import (
	"context"
	"encoding/json"
	"fmt"

	"github.com/go-resty/resty/v2"
)

// IPv6RangesPagedResponse represents a paginated IPv6Range API response
type IPv6RangesPagedResponse struct {
	*PageOptions
	Data []IPv6Range `json:"data"`
}

// IPv6RangeCreateOptions fields are those accepted by CreateIPv6Range
type IPv6RangeCreateOptions struct {
	LinodeID     int    `json:"linode_id,omitempty"`
	PrefixLength int    `json:"prefix_length"`
	RouteTarget  string `json:"route_target,omitempty"`
}

// endpoint gets the endpoint URL for IPv6Range
func (IPv6RangesPagedResponse) endpoint(_ ...any) string {
	return "networking/ipv6/ranges"
}

func (resp *IPv6RangesPagedResponse) castResult(r *resty.Request, e string) (int, int, error) {
	res, err := coupleAPIErrors(r.SetResult(IPv6RangesPagedResponse{}).Get(e))
	if err != nil {
		return 0, 0, err
	}
	castedRes := res.Result().(*IPv6RangesPagedResponse)
	resp.Data = append(resp.Data, castedRes.Data...)
	return castedRes.Pages, castedRes.Results, nil
}

// ListIPv6Ranges lists IPv6Ranges
func (c *Client) ListIPv6Ranges(ctx context.Context, opts *ListOptions) ([]IPv6Range, error) {
	response := IPv6RangesPagedResponse{}
	err := c.listHelper(ctx, &response, opts)
	if err != nil {
		return nil, err
	}
	return response.Data, nil
}

// GetIPv6Range gets details about an IPv6 range
func (c *Client) GetIPv6Range(ctx context.Context, ipRange string) (*IPv6Range, error) {
	e := fmt.Sprintf("networking/ipv6/ranges/%s", ipRange)
	req := c.R(ctx).SetResult(&IPv6Range{})
	r, err := coupleAPIErrors(req.Get(e))
	if err != nil {
		return nil, err
	}
	return r.Result().(*IPv6Range), nil
}

// CreateIPv6Range creates an IPv6 Range and assigns it based on the provided Linode or route target IPv6 SLAAC address.
func (c *Client) CreateIPv6Range(ctx context.Context, opts IPv6RangeCreateOptions) (*IPv6Range, error) {
	body, err := json.Marshal(opts)
	if err != nil {
		return nil, err
	}

	e := "networking/ipv6/ranges"
	req := c.R(ctx).SetResult(&IPv6Range{}).SetBody(string(body))
	r, err := coupleAPIErrors(req.Post(e))
	if err != nil {
		return nil, err
	}
	return r.Result().(*IPv6Range), nil
}

// DeleteIPv6Range deletes an IPv6 Range.
func (c *Client) DeleteIPv6Range(ctx context.Context, ipRange string) error {
	e := fmt.Sprintf("networking/ipv6/ranges/%s", ipRange)
	_, err := coupleAPIErrors(c.R(ctx).Delete(e))
	return err
}