package streams

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

	"github.com/google/go-querystring/query"
	"go.fifitido.net/twitch/api/types"
)

type GetStreamMarkersParams struct {
	// A user ID. The request returns the markers from this user’s most recent video.
	// This ID must match the user ID in the access token or the user in the access token must be one of the broadcaster’s editors.
	//
	// This parameter and the video_id query parameter are mutually exclusive.
	UserID *string `url:"user_id,omitempty"`

	// A video on demand (VOD)/video ID. The request returns the markers from this VOD/video.
	// The user in the access token must own the video or the user must be one of the broadcaster’s editors.
	//
	// This parameter and the user_id query parameter are mutually exclusive.
	VideoID *string `url:"video_id,omitempty"`

	// The maximum number of items to return per page in the response.
	// The minimum page size is 1 item per page and the maximum is 100 items per page.
	// The default is 20.
	First *int `url:"first,omitempty"`

	// The cursor used to get the previous page of results.
	// The Pagination object in the response contains the cursor’s value.
	// Read More: https://dev.twitch.tv/docs/api/guide#pagination
	Before *types.Cursor `url:"before,omitempty"`

	// The cursor used to get the next page of results.
	// The Pagination object in the response contains the cursor’s value.
	// Read More: https://dev.twitch.tv/docs/api/guide#pagination
	After *types.Cursor `url:"after,omitempty"`
}

type GetStreamMarkersResponse struct {
	// The list of markers grouped by the user that created the marks.
	Data []StreamMarkers `json:"data"`

	// The information used to page through the list of results.
	// The object is empty if there are no more pages left to page through.
	// Read More: https://dev.twitch.tv/docs/api/guide#pagination
	Pagination types.Pagination `json:"pagination"`
}

// Gets a list of markers from the user’s most recent stream or from the specified VOD/video.
// A marker is an arbitrary point in a live stream that the broadcaster or editor marked,
// so they can return to that spot later to create video highlights (see Video Producer, Highlights in the Twitch UX).
//
// Requires a user access token that includes the user:read:broadcast or channel:manage:broadcast scope.
func (s *Streams) GetStreamMarkers(ctx context.Context, params *GetStreamMarkersParams) (*GetStreamMarkersResponse, error) {
	v, _ := query.Values(params)
	endpoint := s.baseUrl.ResolveReference(&url.URL{Path: "streams/markers", RawQuery: v.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 markers (%d)", res.StatusCode)
	}

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

	return &data, nil
}