package conduit

import (
	"context"
	"encoding/json"
	"io"
	"net/http"
	"net/url"
)

type UpdateConduitsRequest struct {
	// Conduit ID.
	ID string `json:"id"`

	// The new number of shards for this conduit.
	ShardCount int `json:"shard_count"`
}

type UpdateConduitsResponse struct {
	// List of information about the client’s conduits.
	Data []ConduitData `json:"data"`
}

// Updates a conduit’s shard count. To delete shards, update the count to a lower number, and the shards above the count will be deleted.
// For example, if the existing shard count is 100, by resetting shard count to 50, shards 50-99 are disabled.
//
// Requires an app access token.
func (c *Conduit) UpdateConduits(ctx context.Context, body *UpdateConduitsRequest) (*UpdateConduitsResponse, error) {
	endpoint := c.baseUrl.ResolveReference(&url.URL{Path: "eventsub/conduits"})

	r, w := io.Pipe()

	go func() {
		if err := json.NewEncoder(w).Encode(body); err != nil {
			w.CloseWithError(err)
		} else {
			w.Close()
		}
	}()

	req, err := http.NewRequestWithContext(ctx, http.MethodPatch, endpoint.String(), r)
	if err != nil {
		return nil, err
	}

	res, err := c.client.Do(req)
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()

	var data UpdateConduitsResponse
	if err := json.NewDecoder(res.Body).Decode(&data); err != nil {
		return nil, err
	}

	return &data, nil
}