# Test the ESP32 RSSI extensions on instance1.
# Will SKIP test if instance1 is not an ESP32.
# Instance0 may be an ESP32 or ESP8266.

try:
    import time
    import network
    import random
    import espnow
except ImportError:
    print("SKIP")
    raise SystemExit

# Set read timeout to 5 seconds
timeout_ms = 5000
default_pmk = b"MicroPyth0nRules"
sync = True


def echo_server(e):
    peers = []
    while True:
        peer, msg = e.irecv(timeout_ms)
        if peer is None:
            return
        if peer not in peers:
            peers.append(peer)
            e.add_peer(peer)

        #  Echo the MAC and message back to the sender
        if not e.send(peer, msg, sync):
            print("ERROR: send() failed to", peer)
            return

        if msg == b"!done":
            return


def client_send(e, peer, msg, sync):
    print("TEST: send/recv(msglen=", len(msg), ",sync=", sync, "): ", end="", sep="")
    try:
        if not e.send(peer, msg, sync):
            print("ERROR: Send failed.")
            return
    except OSError as exc:
        # Don't print exc as it is differs for esp32 and esp8266
        print("ERROR: OSError:")
        return


def init(sta_active=True, ap_active=False):
    wlans = [network.WLAN(i) for i in [network.STA_IF, network.AP_IF]]
    e = espnow.ESPNow()
    e.active(True)
    e.set_pmk(default_pmk)
    wlans[0].active(sta_active)
    wlans[1].active(ap_active)
    return e


# Server
def instance0():
    e = init(True, False)
    multitest.globals(PEERS=[network.WLAN(i).config("mac") for i in (0, 1)])
    multitest.next()
    print("Server Start")
    echo_server(e)
    print("Server Done")
    e.active(False)


# Client
def instance1():
    # Instance 1 (the client)
    e = init(True, False)
    if not hasattr(e, "peers_table"):
        e.active(False)
        print("SKIP")
        raise SystemExit

    e.config(timeout_ms=timeout_ms)
    multitest.next()
    peer = PEERS[0]
    e.add_peer(peer)

    # assert len(e.peers) == 1
    print("IRECV() test...")
    msg = bytes([random.getrandbits(8) for _ in range(12)])
    client_send(e, peer, msg, True)
    p2, msg2 = e.irecv()
    print("OK" if msg2 == msg else "ERROR: Received != Sent")

    print("RSSI test...")
    if len(e.peers_table) != 1:
        print("ERROR: len(ESPNow.peers_table()) != 1. ESPNow.peers_table()=", peers)
    elif list(e.peers_table.keys())[0] != peer:
        print("ERROR: ESPNow.peers_table().keys[0] != peer. ESPNow.peers_table()=", peers)
    else:
        rssi, time_ms = e.peers_table[peer]
        if not -127 < rssi < 0:
            print("ERROR: Invalid rssi value:", rssi)
        elif time.ticks_diff(time.ticks_ms(), time_ms) > 5000:
            print("ERROR: Unexpected time_ms value:", time_ms)
        else:
            print("OK")

    # Tell the server to stop
    print("DONE")
    msg = b"!done"
    client_send(e, peer, msg, True)
    p2, msg2 = e.irecv()
    print("OK" if msg2 == msg else "ERROR: Received != Sent")

    e.active(False)