package channelpoints

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

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

type GetCustomRewardParams struct {
	// The ID of the broadcaster whose custom rewards you want to get. This ID must match the user ID found in the OAuth token.
	BroadcasterID string `url:"broadcaster_id"`

	// A list of IDs to filter the rewards by. To specify more than one ID, include this parameter for each reward 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"`

	// A Boolean value that determines whether the response contains only the custom rewards that the app may manage
	// (the app is identified by the ID in the Client-Id header). Set to true to get only the custom rewards that the app may manage.
	// The default is false.
	OnlyManageableRewards *bool `url:"only_manageable_rewards,omitempty"`
}

type GetCustomRewardResponse struct {
	// A list of custom rewards. The list is in ascending order by id. If the broadcaster hasn’t created custom rewards, the list is empty.
	Data []CustomReward `json:"data"`
}

// Gets a list of custom rewards that the specified broadcaster created.
//
// NOTE: A channel may offer a maximum of 50 rewards, which includes both enabled and disabled rewards.
//
// Requires a user access token that includes the channel:read:redemptions or channel:manage:redemptions scope.
func (c *ChannelPoints) GetCustomReward(ctx context.Context, params *GetCustomRewardParams) (*GetCustomRewardResponse, error) {
	v, _ := query.Values(params)

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint.Make(c.baseUrl, "channel_points/custom_rewards", v), 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 rewards (%d)", res.StatusCode)
	}

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

	return &data, nil
}