package github

import (
	"context"
	"encoding/json"
	"fmt"
)

// userResponse is the GitHub API response for the authenticated user.
type userResponse struct {
	Login string `json:"login"`
}

// GetAuthenticatedUser returns the login of the currently authenticated user.
func (c *Client) GetAuthenticatedUser(ctx context.Context) (string, error) {
	reqURL := fmt.Sprintf("%s/user", c.baseURL)

	body, err := c.doGet(ctx, reqURL)
	if err != nil {
		return "", fmt.Errorf("get authenticated user: %w", err)
	}

	var resp userResponse
	if err := json.Unmarshal(body, &resp); err != nil {
		return "", fmt.Errorf("parse user response: %w", err)
	}

	return resp.Login, nil
}