package streams

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

type GetStreamKeyResponse struct {
	// A list that contains the channel’s stream key.
	Data []struct {
		// The channel’s stream key.
		StreamKey string `json:"stream_key"`
	} `json:"data"`
}

// Gets the channel’s stream key.
//
// Requires a user access token that includes the channel:read:stream_key scope.
//
// The broadcaster ID must match the user ID in the access token.
func (s *Streams) GetStreamKey(ctx context.Context, broadcasterID string) (*GetStreamKeyResponse, error) {
	endpoint := s.baseUrl.ResolveReference(&url.URL{Path: "streams/key", RawQuery: url.Values{"broadcaster_id": {broadcasterID}}.Encode()})

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

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

	statusOK := res.StatusCode >= 200 && res.StatusCode < 300
	if !statusOK {
		return nil, fmt.Errorf("failed to get stream key (%d)", res.StatusCode)
	}

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

	return &data, nil
}