const express = require('express')
const router = express.Router()

// The following endpoints are supported.
//
// /before_receive
// /route
// /before_route (only for PROTOCOL=ROUTE connectors)
// /before_send
// /after_send
// /before_dlr (gets dlrinfo)
// /after_dlr

// The req.body contains the following fields.
//
// ccarg - from PLUGIN=pluginname:ccarg of the current connector
// qe - message or delivery report, with field names in uppercase
// result - for after_send and after_dlr
// dlrinfo - custom options for incoming delivery reports
// route - as returned by the previously called plugin

// Output is a list of key=value entries, one per line.
// The key can be as follows.
//
// result - for before_receive, where non-zero means the message will be rejected
// route - the name of the outgoing connector, used for /route
// qe.OPTION_NAME - new value for a message option called "OPTION_NAME"
// dlrinfo.OPTION_NAME - for before_dlr, to return HLR lookup results:
// - OPTION_NAME can be mnc, mcc, msc, and imsi

router.post('/before_receive', (req, res) => {
	console.log('in before_receive') //, body:', req.body)
	const qe = req.body.qe
	let respbuf = ''
	if (qe.DESTADDR === '911')  respbuf = 'result = 8'
	else respbuf = 'qe.SMPPOPTION=0x1400:414243\nqe.SMPPOPTION=0x1401:61626364'
	res.send(respbuf)
})

router.post('/route', (req, res) => {
	console.log('in route') //, qe:', req.body.qe)
	const qe = req.body.qe
	let respbuf = ''
	if (qe.DESTADDR === '123')
		respbuf = Buffer.from('route = out')
	res.send(respbuf)
})

router.use((req, res, next) => {
	console.log('nothing to do for %s %s', req.method, req.url)
	res.status(404).end()
})

module.exports = router