const { Mesh, Mqtt, Portnums, Telemetry, Config, Channel } = require("@meshtastic/protobufs");
const { fromBinary, toBinary, create } = require("@bufbuild/protobuf");
const { LoraStream } = require("./LoraStream");
const { MeshtasticStream } = require("./MeshtasticStream");

const net = require('net');

const client = new net.Socket();
const IP = '192.168.10.117';
const PORT = 4403;

function sendHello() {
    const data = create(Mesh.ToRadioSchema, {
        payloadVariant: {
            case: "wantConfigId",
            value: 1,
        }
    });
    sendToDevice(toBinary(Mesh.ToRadioSchema, data));
}

function sendToDevice(data) {
    const bufferLength = data.length;
    const header = new Uint8Array([
        0x94,
        0xC3,
        (bufferLength >> 8) & 0xFF,
        bufferLength & 0xFF,
    ]);
    data = new Uint8Array([...header, ...data]);
    client.write(data);
}

client.connect(PORT, IP, function() {
	console.log('Connected');
    sendHello();
});

const meshtasticStream = new MeshtasticStream();
client.pipe(new LoraStream()).pipe(meshtasticStream);
meshtasticStream.on('data', (data) => {
    parseMeshtastic(data['$typeName'], data);
})

function parseMeshtastic(typeName, data) {
    switch(typeName) {
        case Mesh.MeshPacketSchema.typeName:
            onMeshPacket(data);
            break;
        case Mesh.NodeInfoSchema.typeName:
            console.log('node info');
            break;
    }
}

function onMeshPacket(envelope) {
    const payloadVariant = envelope.payloadVariant.case;

    if (payloadVariant === 'encrypted') {
        //  attempt decryption
    }

    const dataPacket = envelope.payloadVariant.value;
    const portNum = dataPacket.portnum;

    if (!portNum) {
        return;
    }

    let schema = null;
    switch (portNum) {
        case Portnums.PortNum.POSITION_APP:
            schema = Mesh.PositionSchema;
            break;
        case Portnums.PortNum.TELEMETRY_APP:
            schema = Telemetry.TelemetrySchema;
            break;
        case Portnums.PortNum.TEXT_MESSAGE_APP:
            // no schema?
            break;
        case Portnums.PortNum.WAYPOINT_APP:
            schema = Mesh.WaypointSchema;
            break;
        case Portnums.PortNum.TRACEROUTE_APP:
            schema = Mesh.RouteDiscoverySchema;
            break;
        case Portnums.PortNum.NODEINFO_APP:
            schema = Mesh.NodeInfoSchema;
            break;
        case Portnums.PortNum.NEIGHBORINFO_APP:
            schema = Mesh.NeighborInfoSchema;
            break;
        case Portnums.PortNum.MAP_REPORT_APP:
            schema = Mqtt.MapReportSchema;
            break;
    }

    if (schema !== null) {
        console.log(dataPacket);
        const decodedData = fromBinary(schema, dataPacket.payload);
        console.log(decodedData);
    }
}