package moderation

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 GetModeratedChannelsParams struct {
	// A user’s ID. Returns the list of channels that this user has moderator privileges in. This ID must match the user ID in the user OAuth token
	UserID string `url:"user_id"`

	// The cursor used to get the next page of results. The Pagination object in the response contains the cursor’s value.
	After *types.Cursor `url:"after,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"`
}

type GetModeratedChannelsResponse struct {
	// The list of channels that the user has moderator privileges in.
	Data []GetModeratedChannelsResponseData `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"`
}

type GetModeratedChannelsResponseData struct {
	// An ID that uniquely identifies the channel this user can moderate.
	BroadcasterID string `json:"broadcaster_id"`

	// The channel’s login name.
	BroadcasterLogin string `json:"broadcaster_login"`

	// The channels’ display name.
	BroadcasterName string `json:"broadcaster_name"`
}

// Gets a list of channels that the specified user has moderator privileges in.
//
// Query parameter user_id must match the user ID in the User-Access token
// Requires OAuth Scope: user:read:moderated_channels
func (m *Moderation) GetModeratedChannels(ctx context.Context, params *GetModeratedChannelsParams) (*GetModeratedChannelsResponse, error) {
	v, _ := query.Values(params)

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint.Make(m.baseUrl, "moderation/channels", v), nil)
	if err != nil {
		return nil, err
	}

	res, err := m.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 moderated channels (%d)", res.StatusCode)
	}

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

	return &data, nil
}