'use strict';
/**
*	HASH
*****************************************************
*	DEPENDENCIES
*****************************************************
*	Based on Express Framework
*	System
*****************************************************
*	PUBLIC METHODS
*****************************************************
*	Auth( req, res, next)
*		Extract JWT or BasicAuth data
*	errorJSON( error , request , response , next )
*		Generate error response on bad JSON format
*	error404( request , response , next )
*		Generate error 404 response
*	apiKey( request , response , next )
*		Generate error on invalid apikey
**/

///	Extract JWT or BasicAuth
function Auth( req, res , next ){
	///
	///	Try to extract the authorization data from headers
	///
	let auth;
	if( req.headers.hasOwnProperty( "authorization" ) ){
		auth = req.headers.authorization;
		auth = auth.split(" ")[1];
		if( !auth ){ console.log( "NO HEADER AUTH available" ); return next(); }
		//console.log( auth );
		///	Try	BasicAuth {
		try{
			let ba =  Buffer.from(  auth , 'base64' ).toString() 
			//const [user,pass] = ba.split(':');
			ba = ba.split(':');
			if( ba.length == 2 ){
				req.basicAuth = { user : ba[0] , password : ba[1] };
			}
		}catch(error){
				console.log("MIDDLEWARE_AUTH_ERR_BA",error);
		}
		///	Try	BasicAuth }
	}else if( req.query.access_token ){
		auth = req.query.access_token;
		if( !auth ){ console.log( "NO QUERY AUTH available" ); return next(); }
	}
	if( auth ){
		///	Try JWT	{
		try{
			let jwt = auth.split(".");
			if( jwt.length == 3 ){
					req.JWT = {};
					req.JWT.raw = auth;
			}
		}catch( error ){
			console.log("MIDDLEWARE_AUTH_ERR_JWT",error);
		}
		///	Try JWT	}
	}
	next();
}

function errorJSON( error , request , response , next ){
	console.log(error);
	if( error !== null ){
		///	For body-parser errors
		if( error instanceof SyntaxError && error.status === 400 && 'body' in error ){
			return response.status(400).json({ error : 'Invalid json' , code : 400  });
		}
		///	For any error
		return response.status(500).send( { error: "Internal server error" , code : 500 } );
	}else{
		return next();
	}
}

function error404( request , response , next ){
	return response.status(404).send( { error : "Page not found", code : 404 } );
}

module.exports = {
	Auth,
	errorJSON,
	error404,
};