"""MicroMesh example for the Seeed Studio XIAO RP2040.

Wiring (cross TX and RX):
  XIAO D6 / GPIO0 / TX  -> Meshtastic radio RX
  XIAO D7 / GPIO1 / RX  <- Meshtastic radio TX
  XIAO GND              --- Meshtastic radio GND
"""

from machine import Pin, UART
from time import sleep_ms, ticks_diff, ticks_ms

from micromesh import PortNum, SerialInterface


def on_packet(packet):
    if packet.WhichOneof("payload_variant") != "decoded":
        return
    if packet.decoded.portnum == PortNum.TEXT_MESSAGE_APP:
        try:
            text = packet.decoded.payload.decode("utf-8")
        except UnicodeError:
            text = repr(packet.decoded.payload)
        print("from !%08x: %s" % (packet.from_, text))


def on_receive(message):
    variant = message.WhichOneof("payload_variant")
    print("radio message:", variant or "unknown")


def on_error(error, payload):
    print("skipping undecodable radio frame:", error)
    print("frame bytes:", payload.hex())


print("MicroMesh starting on XIAO RP2040")
print("UART0: D6/GPIO0 TX -> radio RX")
print("UART0: D7/GPIO1 RX <- radio TX")
print("UART0: 115200 baud; common GND required")

uart = UART(
    0,
    baudrate=115200,
    tx=Pin(0),  # XIAO D6
    rx=Pin(1),  # XIAO D7
    timeout=0,
    rxbuf=1024,
)

mesh = SerialInterface(
    uart,
    on_receive=on_receive,
    on_packet=on_packet,
    on_log=lambda line: print("radio log:", line),
    on_error=on_error,
)
mesh.connect()
print("configuration requested; id=%08x" % mesh.config_id)

hello_sent = False
last_status = ticks_ms()
while True:
    mesh.poll()
    if mesh.config_complete and not hello_sent:
        print("radio configuration complete; sending greeting")
        mesh.sendText("hello from XIAO RP2040")
        hello_sent = True
    now = ticks_ms()
    if ticks_diff(now, last_status) >= 5000:
        if mesh.config_complete:
            print("connected; %d nodes known" % len(mesh.nodes))
        else:
            print("waiting for radio data; check TX/RX, GND, baud, and PROTO mode")
        last_status = now
    sleep_ms(10)