#include "scheduler.h"
#include <pebble.h>

struct TheTime the_time;

static void glance_reload_callback(AppGlanceReloadSession *session, size_t limit, void *target) {
	static char s_glance_buffer[22];
	time_t alarm_time = (time_t)(uintptr_t)target;
	struct tm wakeup_tm = *localtime(&alarm_time);
	snprintf(s_glance_buffer, sizeof(s_glance_buffer), "%02u:%02u:%02u, %02u/%02u", wakeup_tm.tm_hour, wakeup_tm.tm_min, wakeup_tm.tm_sec, wakeup_tm.tm_mon + 1, wakeup_tm.tm_mday);
	AppGlanceSlice slice = {
	    .expiration_time = (time_t)(uintptr_t)target,
	    .layout.icon = APP_GLANCE_SLICE_DEFAULT_ICON,
	    .layout.subtitle_template_string = s_glance_buffer,
	};
	app_glance_add_slice(session, slice);
}

// Mostly stolen from https://github.com/SeaPea/GentleWake;
// A slightly more robust wakeup scheduler that retries on certain errors and
// can retry for a different wakeup time offset by retry_diff up to retry_max times
WakeupId wakeup_schedule_simple_robust(time_t wakeup_time, int8_t retry_diff, WakeupReason wakeup_reason) {
	WakeupId result = 0;
	uint8_t try_count = 0;

	result = wakeup_schedule(wakeup_time, wakeup_reason, true);

	if (result < 0) {
		// If result is negative, something went wrong, so make sure all wakeups for this app are cancelled and try again
		wakeup_cancel_all();

		result = wakeup_schedule(wakeup_time, wakeup_reason, true);

		if (result == E_RANGE) {
			// E_RANGE means some other app has the same wakeup time +/- 1 minute, so try to set
			// the wakeup for a time up to (retry_diff * 8) minutes before/after.
			while (result == E_RANGE && try_count++ < 8) {
				wakeup_time += retry_diff;
				result = wakeup_schedule(wakeup_time, wakeup_reason, true);
			}
		}
	}

	if (result >= 0) {
		the_time.HourSet = the_time.HourWIP;
		the_time.MinuteSet = the_time.MinuteWIP;
		app_glance_reload(glance_reload_callback, (void *)(uintptr_t)wakeup_time);
	}

	return result;
}