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

void wlan_reset(void)
{
	// Set WiFi to station mode and disconnect from an AP if it was previously connected
	WiFi.mode(WIFI_STA);
	WiFi.disconnect();
	delay(100);
}

int wlan_connectto(const char *ssid, const char *passwd)
{
	int timeout = 60; // half-seconds

	Serial.print("WLAN: connecting to ");
	Serial.print(ssid);

	if(passwd) {
		WiFi.begin(ssid, passwd);
	} else {
		WiFi.begin(ssid);
	}

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

		if(--timeout == 0) {
			Serial.println(" timeout :-(");
			return -1;
		}
	}

	Serial.println(" connected.");

	Serial.print("WLAN: IP address: ");
	Serial.println(WiFi.localIP());

	return 0;
}

int wlan_connect_any_open(void)
{
	Serial.println("WLAN: scan start");

	// WiFi.scanNetworks will return the number of networks found
	int n = WiFi.scanNetworks();
	Serial.println("WLAN: scan done");
	Serial.print("WLAN: ");
	Serial.print(n);
	Serial.println(" networks found");

	String ssid = "";
	for(int i = 0; i < n; i++)
	{
		if(WiFi.encryptionType(i) == ENC_TYPE_NONE) {
			if(wlan_connectto(ssid.c_str(), NULL) == 0) {
				return 0;
			}
		}
	}

	if(ssid == "") {
		Serial.println("WLAN: No open networks found to connect to.");

		return -2;
	}

	return -1;
}

void wlan_print_conninfo(void)
{
	// print your WiFi shield's IP address:
	IPAddress ip = WiFi.localIP();
	Serial.print("IP Address:  ");
	Serial.println(ip);

	// print your MAC address:
	byte mac[6];
	WiFi.macAddress(mac);
	Serial.print("MAC address: ");
	for(int i = 5; i > 0; i--) {
		Serial.print(mac[i],HEX);
		Serial.print(":");
	}
	Serial.println(mac[0],HEX);

	// BSSID
	byte *bssid = WiFi.BSSID();
	Serial.print("BSSID:       ");
	for(int i = 5; i > 0; i--) {
		Serial.print(bssid[i],HEX);
		Serial.print(":");
	}
	Serial.println(bssid[0],HEX);

	// SSID
	Serial.print("SSID:        ");
	Serial.println(WiFi.SSID());

	// print the received signal strength:
	Serial.print("RSSI:        ");
	Serial.println(WiFi.RSSI());

	/*
	// print the encryption type:
	Serial.print("Encryption:  ");
	Serial.println(WiFi.encryptionType(),HEX);
	Serial.println();
	*/
}