package users

import (
	"context"
	"encoding/json"
	"io"
	"log/slog"
	"net/http"
	"net/url"

	"github.com/google/go-querystring/query"
)

type GetUsersParams struct {
	// The ID of the user to get.
	// To specify more than one user, include the id parameter for each user to get. For example, id=1234&id=5678.
	// The maximum number of IDs you may specify is 100.
	IDs []string `url:"id,omitempty"`

	// The login name of the user to get.
	// To specify more than one user, include the login parameter for each user to get. For example, login=foo&login=bar.
	// The maximum number of login names you may specify is 100.
	Logins []string `url:"login,omitempty"`
}

type GetUsersResponse struct {
	// The list of users.
	Data []User `json:"data"`
}

// Gets information about one or more users.
//
// You may look up users using their user ID, login name, or both but the sum total of the number of users you may look up is 100.
// For example, you may specify 50 IDs and 50 names or 100 IDs or names, but you cannot specify 100 IDs and 100 names.
//
// If you don’t specify IDs or login names, the request returns information about the user in the access token if you specify a user access token.
//
// To include the user’s verified email address in the response, you must use a user access token that includes the user:read:email scope.
//
// Requires an app access token or user access token.
func (u *Users) GetUsers(ctx context.Context, params *GetUsersParams) (*GetUsersResponse, error) {
	v, _ := query.Values(params)
	endpoint := u.baseUrl.ResolveReference(&url.URL{Path: "users", 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()

	body, err := io.ReadAll(res.Body)
	if err != nil {
		return nil, err
	}

	var data GetUsersResponse
	if err := json.Unmarshal(body, &data); err != nil {
		slog.Debug("failed to unmarshal", "error", err, "body", string(body))
		return nil, err
	}

	return &data, nil
}