#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include <ArduinoJson.h>

const char *ssid = "PET Aflytningsvogn #43";
const char *password = "zwr33htm";

const char *mqtt_server = "192.168.24.215";

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi()
{
    delay(10);
    // We start by connecting to a WiFi network
    Serial.println();
    Serial.print("Connecting to ");
    Serial.println(ssid);

    WiFi.begin(ssid, password);

    while (WiFi.status() != WL_CONNECTED)
    {
        delay(500);
        Serial.print(".");
    }

    Serial.println("");
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());
}

void reconnect()
{
    // Loop until we're reconnected
    while (!client.connected())
    {
        Serial.print("Attempting MQTT connection...");
        // Attempt to connect
        if (client.connect("ESP8266Client2"))
        {
            Serial.println("connected");
            client.subscribe("door/lock");
        }
        else
        {
            Serial.print("failed, rc=");
            Serial.print(client.state());
            Serial.println(" try again in 5 seconds");
            // Wait 5 seconds before retrying
            delay(5000);
        }
    }
}

#define RELAY_ACTIVATION_PIN D6

void callback(char* topic, byte* payload, unsigned int length) {
    StaticJsonDocument<256> doc;
    deserializeJson(doc, payload, length);

    Serial.print("Message arrived [");
    Serial.print(topic);
    Serial.print("] ");
    for (int i = 0; i < length; i++) {
        Serial.print((char)payload[i]);
    }
    Serial.println();

    if (doc["deviceId"] == 2 && doc["lock"] == true) {
        digitalWrite(RELAY_ACTIVATION_PIN, HIGH);   // Turn the relay on
    } else {
        digitalWrite(RELAY_ACTIVATION_PIN, LOW);  // Turn the relay off
    }

}

void setup()
{
    Serial.begin(115200);

    pinMode(RELAY_ACTIVATION_PIN, OUTPUT);

    setup_wifi();
    client.setServer(mqtt_server, 1883);
    client.setCallback(callback);
    reconnect();
}

void loop()
{
    client.loop();
}