#include <MCCI_LoRaWAN_LMIC.h>
#include <hal/hal.h>
#include <SPI.h>

// LORA credentials - replace with yours
static const u1_t PROGMEM DEVEUI[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static const u1_t PROGMEM APPEUI[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static const u1_t PROGMEM APPKEY[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

// Pin mapping for Arduino
const lmic_pinmap lmic_pins = {
    .nss = 10,
    .rxtx = LMIC_UNUSED_PIN,
    .rst = 9,
    .dio = {2, 3, 4},
};

void os_getArtEui (u1_t* buf) { memcpy_P(buf, APPEUI, 8); }
void os_getDevEui (u1_t* buf) { memcpy_P(buf, DEVEUI, 8); }
void os_getDevKey (u1_t* buf) { memcpy_P(buf, APPKEY, 16); }

static uint8_t data[3];
static osjob_t sendjob;

// Schedule data transmission
const unsigned TX_INTERVAL = 10;

void onEvent (ev_t ev) {
    Serial.print(os_getTime());
    Serial.print(": ");
    switch(ev) {
        case EV_JOINING:
            Serial.println(F("EV_JOINING"));
            break;
        case EV_JOINED:
            Serial.println(F("EV_JOINED"));
            LMIC_setLinkCheckMode(0);
            break;
        case EV_TXCOMPLETE:
            Serial.println(F("EV_TXCOMPLETE"));
            if (LMIC.txrxFlags & TXRX_ACK)
              Serial.println(F("Received ack"));
            if (LMIC.dataLen) {
              Serial.print(F("Received "));
              Serial.print(LMIC.dataLen);
              Serial.println(F(" bytes"));
            }
            os_setTimedCallback(&sendjob, os_getTime() + sec2osticks(TX_INTERVAL), do_send);
            break;
        default:
            Serial.print(F("Unknown event: "));
            Serial.println((unsigned) ev);
            break;
    }
}

void do_send(osjob_t* j) {
    if (LMIC.opmode & OP_TXRXPEND) {
        Serial.println(F("OP_TXRXPEND, not sending"));
        return;
    }
    
    // Prepare data
    int x = 1;
    int y = 1;
    data[0] = x;
    data[1] = y;
    
    Serial.println(F("X: "));
    Serial.println(x);
    Serial.println(F("Y: "));
    Serial.println(y);
    
    // Prepare upstream data transmission at the next possible time
    LMIC_setTxData2(1, data, sizeof(data), 1);
    Serial.println(F("Packet queued"));
}

void setup() {
    Serial.begin(9600);
    Serial.println(F("Starting"));
    
    // LMIC init
    os_init();
    LMIC_reset();
    
    // Start job
    do_send(&sendjob);
}

void loop() {
    os_runloop_once();
}