/*
Package xbee provides communication and configuration of Digi XBee products

(and other Digi products that are similar such as the XLR Pro). It provides
a net.Conn-like interface as well as AT commands for configuration. The most
common usage of the package is with a Session, which provides
*/
package xbee

import (
	"encoding/binary"
	"os"
	"testing"

	"golang.org/x/exp/slog"
)


func TestXBeeHardware(t *testing.T) {
	// this test runs only if the environemnt variable
	// XBEE_DEVICE is set.

	devStr, ok := os.LookupEnv("XBEE_DEVICE")

	if !ok {
		t.Skip("No XBee device provided")
	}

	var sess *Session = nil
	defer sess.Close()
	// test connection.
	t.Run("Connect to device", func(t *testing.T) {
		dev, err := ParseDeviceString(devStr)
		if err != nil {
			t.Errorf("ParseDeviceString() error = %v", err)
		}
		sess, err = NewSession(dev, slog.With("type", dev.Type()))
		if err != nil {
			t.Errorf("NewSession() error = %v", err)
		}
		// err = sess.Close()
		// if err != nil {
		// 	t.Errorf("Session.Close() error = %v", err)
		// }

	})
	
	// now we should test sending a packet. and getting a response.

	t.Run("Get Network ID", func(t *testing.T) {
		b, err := sess.ATCommand([2]rune{'I','D'}, nil, false)
		if err != nil {
			t.Errorf("ATCommand() error = %v", err)
		}
		if len(b) != 2 {
			t.Errorf("reponse length mismatch: expected 2 got %d", len(b))
		}
	})

	t.Run("Check NP", func(t *testing.T) {
		b, err := sess.ATCommand([2]rune{'N','P'}, nil, false)

		if err != nil {
			t.Errorf("ATCommand() error = %v", err)
		}

		val := binary.BigEndian.Uint16(b)
		if val != 0x100 {
			t.Errorf("NP response wrong, expected 0x100 got %x", val)
		}
	})


}