import querystring from "node:querystring"

import axios from "axios"

import { OAuthStrategy } from "#src/tools/utils/OAuthStrategy.js"

export const GOOGLE_PROVIDER = "Google"
export const GOOGLE_BASE_URL = "https://accounts.google.com/o/oauth2/v2/auth"
export const GOOGLE_OAUTH2_TOKEN = "https://oauth2.googleapis.com/token"
export const GOOGLE_USERINFO =
  "https://www.googleapis.com/oauth2/v1/userinfo?alt=json"
export const GOOGLE_CLIENT_ID =
  process.env["GOOGLE_CLIENT_ID"] ?? "GOOGLE_CLIENT_ID"
export const GOOGLE_CLIENT_SECRET =
  process.env["GOOGLE_CLIENT_SECRET"] ?? "GOOGLE_CLIENT_SECRET"
export const googleStrategy = new OAuthStrategy(GOOGLE_PROVIDER)

export interface GoogleUser {
  id: string
  name: string
  given_name: string
  link: string
  picture: string
  locale: string
}

export interface GoogleTokens {
  access_token: string
  expires_in: number
  token_type: string
  scope: string
  refresh_token?: string
}

export const getGoogleUserData = async (
  code: string,
  redirectURI: string,
): Promise<GoogleUser> => {
  const { data: token } = await axios.post<GoogleTokens>(
    GOOGLE_OAUTH2_TOKEN,
    querystring.stringify({
      client_id: GOOGLE_CLIENT_ID,
      client_secret: GOOGLE_CLIENT_SECRET,
      code,
      redirect_uri: redirectURI,
      grant_type: "authorization_code",
    }),
    {
      headers: {
        "Content-Type": "application/x-www-form-urlencoded",
        Accept: "application/json",
      },
    },
  )
  const { data: googleUser } = await axios.get<GoogleUser>(
    `${GOOGLE_USERINFO}&access_token=${token.access_token}`,
  )
  return googleUser
}