package channelpoints

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

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

type GetCustomRewardRedemptionParams struct {
	// The ID of the broadcaster that owns the custom reward. This ID must match the user ID found in the user OAuth token.
	BroadcasterID string `url:"broadcaster_id"`

	// The ID that identifies the custom reward whose redemptions you want to get.
	RewardID string `url:"reward_id"`

	// The status of the redemptions to return. The possible case-sensitive values are:
	//
	// NOTE: This field is required only if you don’t specify the id query parameter.
	//
	// NOTE: Canceled and fulfilled redemptions are returned for only a few days after they’re canceled or fulfilled.
	Status *RewardRedemptionStatus `url:"status,omitempty"`

	// A list of IDs to filter the redemptions by. To specify more than one ID, include this parameter for each redemption you want to get.
	// For example, id=1234&id=5678. You may specify a maximum of 50 IDs.
	//
	// Duplicate IDs are ignored. The response contains only the IDs that were found. If none of the IDs were found, the response is 404 Not Found.
	IDs []string `url:"id,omitempty"`

	// The order to sort redemptions by. The default is OLDEST.
	Sort *types.SortOrder `url:"sort,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 *string `url:"after,omitempty"`

	// The maximum number of redemptions to return per page in the response.
	// The minimum page size is 1 redemption per page and the maximum is 50.
	// The default is 20.
	First *int `url:"first,omitempty"`
}

type GetCustomRewardRedemptionResponse struct {
	// The list of redemptions for the specified reward. The list is empty if there are no redemptions that match the redemption criteria.
	Data []CustomRewardRedemption `json:"data"`
}

// Gets a list of redemptions for the specified custom reward. The app used to create the reward is the only app that may get the redemptions.
//
// Requires a user access token that includes the channel:read:redemptions or channel:manage:redemptions scope.
func (c *ChannelPoints) GetCustomRewardRedemption(ctx context.Context, params *GetCustomRewardRedemptionParams) (*GetCustomRewardRedemptionResponse, error) {
	v, _ := query.Values(params)
	endpoint := c.baseUrl.ResolveReference(&url.URL{Path: "channel_points/custom_rewards/redemptions", RawQuery: v.Encode()})

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

	res, err := c.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 custom reward redemptions (%d)", res.StatusCode)
	}

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

	return &data, nil
}