package users

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

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

type GetUserBlockListParams struct {
	// The ID of the broadcaster whose list of blocked users you want to get.
	BroadcasterID string `url:"broadcaster_id"`

	// 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.
	// 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 GetUserBlockListResponse struct {
	// The list of blocked users. The list is in descending order by when the user was blocked.
	Data []struct {
		// An ID that identifies the blocked user.
		UserID string `json:"user_id"`

		// The blocked user’s login name.
		UserLogin string `json:"user_login"`

		// The blocked user’s display name.
		DisplayName string `json:"display_name"`
	} `json:"data"`
}

// Gets the list of users that the broadcaster has blocked.
// Read More: https://help.twitch.tv/s/article/how-to-manage-harassment-in-chat?language=en_US#BlockWhispersandMessagesfromStrangers
//
// Requires a user access token that includes the user:read:blocked_users scope.
func (u *Users) GetUserBlockList(ctx context.Context, params *GetUserBlockListParams) (*GetUserBlockListResponse, error) {
	v, _ := query.Values(params)
	endpoint := u.baseUrl.ResolveReference(&url.URL{Path: "users/blocks", RawQuery: v.Encode()})

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

	res, err := u.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 user block list (%d)", res.StatusCode)
	}

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

	return &data, nil
}