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#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEClient.h>
#include <BLEAdvertisedDevice.h>
#include <SparkFun_OWire_Arduino_Library.h>

BLEClient* pClient;
bool connected = false;

BLEUUID customServiceUUID("4fafc201-1fb5-459e-8fcc-c5c9c331914b");
BLEUUID customCharUUID("beb5483e-36e1-4688-b7f5-ea07361b26a8");

OWIRE myLED;

static void ledNotifyCallback(BLERemoteCharacteristic* pBLERemoteCharacteristic, uint8_t* pData, size_t length, bool isNotify) {
    int value = *pData;

    if (value == 0) {
        myLED.setModeAndColor(OW_SOLID, OW_RED);
    } else {
        myLED.setModeAndColor(OW_SOLID, OW_GREEN);
    }
}

class MyClientCallback : public BLEClientCallbacks {
    void onConnect(BLEClient* pclient) {
        connected = true;
        myLED.setModeAndColor(OW_SOLID, OW_YELLOW);
    }
    void onDisconnect(BLEClient* pclient) {
        ESP.restart();
    }
};

void setup() {
    Serial.begin(115200);
    myLED.begin(4, false);
    myLED.setModeAndColor(OW_SOLID, OW_BLUE);

    BLEDevice::init("LED Client");
    pClient = BLEDevice::createClient();
    pClient->setClientCallbacks(new MyClientCallback());

    while (!connected) {
        BLEScan* pBLEScan = BLEDevice::getScan();
        pBLEScan->setActiveScan(true);
        pBLEScan->setInterval(100);
        pBLEScan->setWindow(99);

        BLEScanResults scanResults = pBLEScan->start(5);

        for (int i = 0; i < scanResults.getCount(); i++) {
            BLEAdvertisedDevice device = scanResults.getDevice(i);
            if (device.haveServiceUUID() && device.isAdvertisingService(customServiceUUID)) {
                pClient->connect(&device);
                break;
            }
        }

        if (!connected) {
            Serial.println("Connection failed. Waiting 15 seconds before retrying.");
            myLED.setModeAndColor(OW_SOLID, OW_CYAN);
            delay(15000); // Wait for 15 seconds before retrying
            myLED.setModeAndColor(OW_SOLID, OW_BLUE);
        }
    }

    if (connected) {
        BLERemoteService* pRemoteService = pClient->getService(customServiceUUID);

        if (pRemoteService) {
            BLERemoteCharacteristic* pRemoteCharacteristic = pRemoteService->getCharacteristic(customCharUUID);

            if (pRemoteCharacteristic) {
                pRemoteCharacteristic->registerForNotify(ledNotifyCallback);
                pRemoteCharacteristic->getDescriptor(BLEUUID((uint16_t)0x2902))->writeValue((uint8_t*)"\x01", 1);
            } else {
                Serial.println("Custom characteristic not found.");
            }
        } else {
            Serial.println("Custom service not found.");
        }
    }
}

void loop() {
    // Nothing to do in the loop for this example
}