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

-- | [DropBox oauth guide](https://developers.dropbox.com/oauth-guide)
module Network.OAuth2.Provider.Dropbox where

import Data.Aeson
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 Dropbox = Dropbox deriving (Eq, Show)

type instance IdpUserInfo Dropbox = DropboxUser

defaultDropboxApp :: IdpApplication 'AuthorizationCode Dropbox
defaultDropboxApp =
  AuthorizationCodeIdpApplication
    { idpAppClientId = ""
    , idpAppClientSecret = ""
    , idpAppScope = Set.empty
    , idpAppAuthorizeState = "CHANGE_ME"
    , idpAppAuthorizeExtraParams = Map.empty
    , idpAppRedirectUri = [uri|http://localhost|]
    , idpAppName = "default-dropbox-App"
    , idpAppTokenRequestAuthenticationMethod = ClientSecretBasic
    , idp = defaultDropboxIdp
    }

defaultDropboxIdp :: Idp Dropbox
defaultDropboxIdp =
  Idp
    { idpFetchUserInfo = \mgr at url -> authPostJSON @(IdpUserInfo Dropbox) mgr at url []
    , idpAuthorizeEndpoint = [uri|https://www.dropbox.com/1/oauth2/authorize|]
    , idpTokenEndpoint = [uri|https://api.dropboxapi.com/oauth2/token|]
    , idpUserInfoEndpoint = [uri|https://api.dropboxapi.com/2/users/get_current_account|]
    }

newtype DropboxUserName = DropboxUserName {displayName :: Text}
  deriving (Show, Generic)

data DropboxUser = DropboxUser
  { email :: Text
  , name :: DropboxUserName
  }
  deriving (Show, Generic)

instance FromJSON DropboxUserName where
  parseJSON = genericParseJSON defaultOptions {fieldLabelModifier = camelTo2 '_'}

instance FromJSON DropboxUser