#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
//#include <WifiClientSecureBearSSL.h>
#include <bearssl.h>
#include <FS.h>

HTTPClient client;
BearSSL::WifiClientSecure *transport;
BearSSL::X509List cert_list;

void init_wifi() {
  transport = new WifiClientSecure();

  Serial.println("Attempting to (re)connect to wifi");
  WiFi.disconnect();
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  int elapsed = 0;
  while (WiFi.status() != WL_CONNECTED) {
      Serial.print("Wifi connecting for ");
      Serial.print(elapsed);
      Serial.println(" seconds");
      elapsed++;
      delay(1000);
  }

  Serial.println("Wifi connected");
  
  sync_time();
  load_ca_cert();
}

void load_ca_cert() {
  // read cert from file
  if (!SPIFFS.begin()) {
    Serial.println("Failed to mount file system.");
    return
  }

  File cert = SPIFFS.open("/ca_cert.pem", "r");
  if (!cert) {
    Serial.println("Couldn't open cert file.");
    return;
  }

  cert_list.append(strdup(cert.readString().c_str()));
  netClient->setTrustAnchors(&certList);
}

void sync_time() {
  // sync time
  Serial.print("Syncing time");
  configTime(8 * 3600, 0, "pool.ntp.org", "time.nist.gov");
  time_t now = time(nullptr);
  while (now < 8 * 3600 * 2) {
    delay(500);
    Serial.print(".");
    now = time(nullptr);
  }
  Serial.println("");
}