package polls

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

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

type GetPollsParams struct {

	// The ID of the broadcaster that created the polls. This ID must match the user ID in the user access token.
	BroadcasterID string `url:"broadcaster_id"`

	// A list of IDs that identify the polls to return.
	// To specify more than one ID, include this parameter for each poll you want to get. For example, id=1234&id=5678.
	// You may specify a maximum of 20 IDs.
	ID []string `url:"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 20 items per page.
	// The default is 20.
	First *int `url:"first,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 GetPollsResponse struct {
	// A list of polls. The polls are returned in descending order of start time unless you specify IDs in the request,
	// in which case they’re returned in the same order as you passed them in the request.
	// The list is empty if the broadcaster hasn’t created polls.
	Data []Poll `json:"data"`

	// Contains information about the pagination in the response.
	// The object is empty if there are no more pages of results.
	// Read More: https://dev.twitch.tv/docs/api/guide#pagination
	Pagination types.Pagination `json:"pagination"`
}

// Gets a list of polls that the broadcaster created.
//
// Polls are available for 90 days after they’re created.
//
// Requires a user access token that includes the channel:read:polls or channel:manage:polls scope.
func (p *Polls) GetPolls(ctx context.Context, params *GetPollsParams) (*GetPollsResponse, error) {
	v, _ := query.Values(params)

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint.Make(p.baseUrl, "polls", v), nil)
	if err != nil {
		return nil, err
	}

	res, err := p.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 polls (%d)", res.StatusCode)
	}

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

	return &data, nil
}