Node mcu rain sensor

[Jadblack]

Hello everybody I am trying to compile this code with Arduino ide on a esp8266 but I get this error on line 45:
setup_wifi not declared in this scope
How can I fix it and however can someone help me to publish a reading of a rain sensor over Mqtt?

Thanks everyone

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

#define WIFI_SSID "wifissid"
#define WIFI_PASSWORD "password"

#define MQTT_SERVER "10.25.73.8"
#define MQTT_PORT 1883 // use 8883 for SSL
#define MQTT_USER "pi" //user for Mosquitto
#define MQTT_PASSWORD "raspberry" //passord for Mosquitto

#define rain_topic "sensor/rain" //Topic Rain

const int sensorMin = 0; // sensor minimum
const int sensorMax = 1024; // sensor maximum

char message_buff[100];
bool debug = true;

WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
Serial.begin(9600);
pinMode(A0, INPUT);
setup_wifi();
client.setServer(MQTT_SERVER, MQTT_PORT);
client.setCallback(callback);

//Connecfion WiFi
void setup_wifi() {
delay(10);
// We start by connecting to a WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(WIFI_SSID);
WiFi.mode(WIFI_STA);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

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

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

//Reconnexion
void reconnect() {
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
// Attempt to connect
if (client.connect("ESP8266Client", MQTT_USER, MQTT_PASSWORD)) {
Serial.println("Connected");
} else {
Serial.print("Failed, Error: ");
Serial.print(client.state());
Serial.println(" Retrying MQTT connection in 5 seconds...");
delay(5000); // Wait 5 seconds before retrying
}
}
}

void loop() {
if (!client.connected())
{
reconnect();
}
client.loop();

int sensorReading = analogRead(A0);
int range = map(sensorReading, sensorMin, sensorMax, 0, 3);

// range value:
switch (range) {
case 0: // Sensor getting wet
Serial.println("Flood");
client.publish(rain_topic, "Flood", true);
break;
case 1: // Sensor getting wet
Serial.println("Rain Warning");
client.publish(rain_topic, "raining", true);
break;
case 2: // Sensor dry - To shut this up delete the " Serial.println("Not Raining"); " below.
Serial.println("Sun");
client.publish(rain_topic, "sun", true);
break;
}
delay(1000 * 10); // delay between reads

}

// Start after receiving the message
void callback(char* topic, byte* payload, unsigned int length) {
int i = 0;
if ( debug ) {
Serial.println("Message recu => topic: " + String(topic));
Serial.print(" | longueur: " + String(length, DEC));
}
// create character buffer with ending null terminator (string)
for (i = 0; i < length; i++) {
message_buff[i] = payload[i];
}
message_buff[i] = '\0';

String msgString = String(message_buff);
if ( debug ) {
Serial.println("Payload: " + msgString);
}
}