#include "network.h"
#include "WiFi.h"
#include "display.h"
#include "options.h"
#include "config.h"
#include "telnet.h"

Network network;

void syncTime() {
  network.requestTimeSync(true);
}

void Network::begin() {
  config.initNetwork();
  if (config.ssidsCount == 0) {
    raiseSoftAP();
    return;
  }
  byte ls = (config.store.lastSSID == 0 || config.store.lastSSID > config.ssidsCount) ? 0 : config.store.lastSSID - 1;
  byte startedls = ls;
  byte errcnt = 0;
  WiFi.mode(WIFI_STA);
  char buf[40] = { 0 };
  while (true) {
    Serial.printf("Attempt to connect to %s\n", config.ssids[ls].ssid);
    snprintf(buf, sizeof(buf) - 1, "ATTEMPT TO %s", config.ssids[ls].ssid);
    display.bootString(buf, 110);
    WiFi.begin(config.ssids[ls].ssid, config.ssids[ls].password);
    strcpy(buf, ".");
    while (WiFi.status() != WL_CONNECTED) {
      delay(500);
      digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
      strcat(buf, ".");
      display.bootString(buf, 90);
      errcnt++;
      if (errcnt > 16) {
        errcnt = 0;
        ls++;
        if (ls > config.ssidsCount - 1) ls = 0;
        break;
      }
    }
    if (WiFi.status() != WL_CONNECTED && ls == startedls) {
      raiseSoftAP();
      return;
    }
    if (WiFi.status() == WL_CONNECTED) {
      config.setLastSSID(ls + 1);
      break;
    }
  }
  digitalWrite(LED_BUILTIN, LOW);
  status = CONNECTED;
  requestTimeSync();
  ntimer.attach_ms(TSYNC_DELAY, syncTime);
}

void Network::requestTimeSync(bool withTelnetOutput) {
  configTime(config.store.tzHour * 3600 + config.store.tzMin * 60, config.getTimezoneOffset(), "pool.ntp.org", "ru.pool.ntp.org");
  if (withTelnetOutput) {
    getLocalTime(&timeinfo);
    char timeStringBuff[50];
    strftime(timeStringBuff, sizeof(timeStringBuff), "%Y-%m-%dT%H:%M:%S", &timeinfo);
    if (config.store.tzHour < 0) {
      telnet.printf(0, "##SYS.DATE#: %s%03d:%02d\n> ", timeStringBuff, config.store.tzHour, config.store.tzMin);
    } else {
      telnet.printf(0, "##SYS.DATE#: %s+%02d:%02d\n> ", timeStringBuff, config.store.tzHour, config.store.tzMin);
    }
  }
}

void Network::raiseSoftAP() {
  WiFi.mode(WIFI_AP);
  WiFi.softAP(apSsid, apPassword);
  status = SOFT_AP;
}