{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE TypeFamilies #-}

-- | https://developer.twitter.com/en/docs/authentication/oauth-2-0/authorization-code
module Network.OAuth2.Provider.Twitter where

import Data.Aeson
import Data.Char (toLower)
import Data.Map.Strict qualified as Map
import Data.Set qualified as Set
import Data.Text.Lazy (Text)
import GHC.Generics
import Network.OAuth.OAuth2
import Network.OAuth2.Experiment
import URI.ByteString.QQ

data Twitter = Twitter deriving (Eq, Show)

type instance IdpUserInfo Twitter = TwitterUserResp

defaultTwitterApp :: IdpApplication 'AuthorizationCode Twitter
defaultTwitterApp =
  AuthorizationCodeIdpApplication
    { idpAppClientId = ""
    , idpAppClientSecret = ""
    , idpAppScope = Set.fromList ["tweet.read", "users.read"]
    , idpAppAuthorizeState = "CHANGE_ME"
    , idpAppAuthorizeExtraParams = Map.empty
    , idpAppRedirectUri = [uri|http://localhost|]
    , idpAppName = "default-twitter-App"
    , idpAppTokenRequestAuthenticationMethod = ClientSecretBasic
    , idp = defaultTwitterIdp
    }

defaultTwitterIdp :: Idp Twitter
defaultTwitterIdp =
  Idp
    { idpFetchUserInfo = authGetJSON @(IdpUserInfo Twitter)
    , idpUserInfoEndpoint = [uri|https://api.twitter.com/2/users/me|]
    , idpAuthorizeEndpoint = [uri|https://twitter.com/i/oauth2/authorize|]
    , idpTokenEndpoint = [uri|https://api.twitter.com/2/oauth2/token|]
    }

data TwitterUser = TwitterUser
  { name :: Text
  , id :: Text
  , username :: Text
  }
  deriving (Show, Generic)

newtype TwitterUserResp = TwitterUserResp {twitterUserRespData :: TwitterUser}
  deriving (Show, Generic)

instance FromJSON TwitterUserResp where
  -- 15 = length "twitterUserResp"
  parseJSON = genericParseJSON (defaultOptions {fieldLabelModifier = map toLower . drop 15})

instance FromJSON TwitterUser