#include <WiFi.h>
#include <time.h>

#define TIMEZONE_JST (3600 * 9)
#define DAYLIGHTOFFSET_JST (0)

const char* ntp_server1 = "ntp.nict.jp";
const char* ntp_server2 = "pool.ntp.org";

static char *ssid[] = {"ssid_1","ssid_2"};
static char *password[] = {"password_1","password_2"};
int  wifi_cnt = 2;
static time_t t = 0;
static char clocktime[25]; // 時刻表示用文字列
static char filename[7];   // 撮影用文字列
static char dirname[9];    // ディレクトリ用文字列
static char jpegname[20];

void setup() {

	Serial.begin(115200);
	delay(100);

	for (int i=0;i<wifi_cnt;++i) {
		get_ntp(i);
		if (t>TIMEZONE_JST) break;
	}
}

void get_ntp(int num) {

	int cnt = 0;

	WiFi.begin(ssid[num], password[num]);
	while (WiFi.status() != WL_CONNECTED) {
		if ((++cnt)==20) return;
		delay(500);
	}

	configTime(TIMEZONE_JST, DAYLIGHTOFFSET_JST, ntp_server1, ntp_server2);

	for (cnt=0;cnt<10;++cnt) {
		t = time(NULL);
		if (t>TIMEZONE_JST) break;
		delay(500);
	}
	WiFi.disconnect();
}

void getdate() {

	static const char *pszWDay[] = {"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
	time_t now = t + millis()/1000;
	struct tm* tm = localtime(&now);

	sprintf(clocktime, "%04d/%02d/%02d(%s) %02d:%02d:%02d",
					tm->tm_year+1900,
					tm->tm_mon+1,
					tm->tm_mday,
					pszWDay[tm->tm_wday],
					tm->tm_hour,
					tm->tm_min,
					tm->tm_sec );

	sprintf(filename,"%02d%02d%02d",tm->tm_hour,tm->tm_min,tm->tm_sec);
	sprintf(dirname,  "%04d%02d%02d",tm->tm_year+1900,tm->tm_mon+1,tm->tm_mday);
	sprintf(jpegname,"%s/%s.jpg",dirname,filename);
}

void loop() {
	getdate();
	Serial.println(clocktime);
	Serial.print("filename=");
	Serial.println(jpegname);
	delay(1000);
}