# emerytura.py -rw-r--r-- 3.5 KiB View raw 
                                                                                
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import badger2040
from badger2040 import WIDTH
import jpegdec
import time
import machine
import sys

COUNTDOWN_UNTIL = time.mktime((2024, 8, 29, 0, 0, 0, 0, 0))


def is_clock_set() -> bool:
    badger2040.pcf_to_pico_rtc()
    now = time.localtime()
    return now[0] >= 2023


def get_voltage_raw() -> float:
    wl_cs = machine.Pin(25) # WiFi chip SDIO_DATA3 / gate on FET between VSYS divider (FET drain) and GPIO29 (FET source)
    wl_cs.init(mode=machine.Pin.OUT, value=1)
    pin = machine.ADC(29)
    adc_reading  = pin.read_u16()
    adc_voltage  = (adc_reading * 3.3) / 65535
    vsys_voltage = adc_voltage * 3
    #wl_cs.init(mode=machine.Pin.ALT, pull=machine.Pin.PULL_DOWN, alt=31)#try to restore initial WL_CS state
    return vsys_voltage


def get_voltage() -> str:
    return f"{get_voltage_raw():.2f}v"


def is_usb_connected() -> bool:
    return get_voltage_raw() > 4.0


def config_rtc(display: badger2040.Badger2040) -> None:
    if badger2040.is_wireless() and not is_clock_set() and False:
        import ntptime
        try:
            display.connect()
            if display.isconnected():
                ntptime.settime()
        except (RuntimeError, OSError) as e:
            print(f"Wireless Error: {e.value}")
    try:
        badger2040.pcf_to_pico_rtc()
    except RuntimeError:
        pass


def get_diffstr() -> Optional[str]:
    now = time.localtime()
    tdelta = COUNTDOWN_UNTIL - time.mktime(now)
    if tdelta < 0:
        return None
    years, months, days, _, _, _, _, _ = time.localtime(tdelta)
    years -= 1970
    months -= 1
    retval: str = ""
    if years != 0:
        retval += f"{years} lat, "
    if months != 0:
        retval += f"{months} mies. i "
    if days == 1:
        return f"{retval}{days} dzien"
    return f"{retval}{days} dni"


def display_background(display: badger2040.Badger2040, filepath: str) -> None:
    jpeg = jpegdec.JPEG(display.display)
    jpeg.open_file(filepath)
    jpeg.decode(0, 0)


def display_countdown(display: boadger2040.Badger2040, countdown_str: str) -> None:
    display.set_font("sans")
    display.set_pen(0)
    display.set_thickness(3)
    display.text(countdown_str, 8, 60, WIDTH, 1)


def display_voltage(display: badger2040.Badger2040, x: int = 185) -> None:
    display.set_font("bitmap8")
    display.set_pen(0)
    display.text(get_voltage(), x, 115, WIDTH, 1)


def main() -> None:
    display = badger2040.Badger2040()
    display.led(8)
    display.set_update_speed(badger2040.UPDATE_FAST)
    config_rtc(display)
    
    if is_clock_set():
        countdown_str = get_diffstr()
        if countdown_str:
            display_background(display, "/emerytura/emerytura.jpg")
            display_countdown(display, countdown_str)
        else:
            display_background(display, "/emerytura/juz_na_emeryturze.jpg")
        display_voltage(display)
    else:
        display_background(display, "/emerytura/bad_clock.jpg")
        display_voltage(display, 260)

    display.update()

    badger2040.pico_rtc_to_pcf()
    badger2040.sleep_for(180)


try:
    while True:
        main()
except Exception as e:
    import io
    import sys
    display = badger2040.Badger2040()
    display.set_font("bitmap8")
    display.set_pen(15)
    display.text(f"Exception: {e}", 5, 5, WIDTH, 1)
    tb = io.StringIO()
    sys.print_exception(e, tb)
    line_pos=15
    for tb_line in tb.getvalue().split('\n'):
        display.text(tb_line, 5, line_pos, WIDTH, 1)
        line_pos = line_pos+10
    display.update()
    while True:
        display.keepalive()
        display.halt()