# SPDX-License-Identifier: LGPL-3.0-or-later
# Copyright (C) 2020 Daniel Thompson

def nop():
    pass
schedule = nop
def _callback(obj):
    schedule()

# Start measuring time (and feeding the watchdog) before *anything* else
from machine import RTCounter
from drivers.nrf_rtc import RTC
rtc = RTC(RTCounter(1, mode=RTCounter.PERIODIC, period=1, callback=_callback))
rtc.counter.start()

import gc
import os
import time

import draw565

from machine import I2C
from machine import Pin
#from machine import Signal
from machine import SPI

from drivers.battery import Battery
from drivers.bma421 import BMA421
from drivers.touch import TouchButton
from drivers.hrs3300 import HRS3300
from drivers.signal import Signal
from drivers.st7789 import ST7789_SPI
from drivers.vibrator import Vibrator
from flash.flash_spi import FLASH

from ubluepy import uart_connected as connected

class Backlight(object):
    lo = Pin("BL_LO", Pin.OUT, value=0)
    mid = Pin("BL_MID", Pin.OUT, value=1)
    hi = Pin("BL_HI", Pin.OUT, value=1)

    def __init__(self, level=1):
        self.set(level)

    def set(self, level):
        """K9 backlight is very weak so we avoid lo in its own because it is
        pointless.
        """
        hi = 1
        mid = 1
        lo = 0

        if level >= 3:
            hi = 0
            mid = 0
        elif level == 2:
            hi = 0
        elif level == 1:
            mid = 0
        else:
            lo = 1

        self.hi(hi)
        self.mid(mid)
        self.lo(lo)

# Setup the display (and manage the backlight)
backlight = Backlight(0)
spi = SPI(0)
spi.init(polarity=1, phase=1, baudrate=8000000)
display = ST7789_SPI(240, 240, spi,
        cs=Pin("DISP_CS", Pin.OUT),
        dc=Pin("DISP_DC", Pin.OUT),
        res=Pin("DISP_RST", Pin.OUT))
drawable = draw565.Draw565(display)

def boot_msg(s):
    drawable.string(s, 0, 108, width=240)
    if safe_mode:
        time.sleep_ms(500)

safe_mode = False
boot_msg("Init button")
button = Pin('BUTTON', Pin.IN)
safe_mode = button.value()
if safe_mode:
    backlight.set(2)
    time.sleep(1)

try:
    # Setup the last few bits and pieces
    boot_msg("Init battery")
    battery = Battery(
            Pin('BATTERY', Pin.IN),
            Signal(Pin('CHARGING', Pin.IN), invert=True),
            Signal(Pin('USB_PWR', Pin.IN), invert=True))
    boot_msg("Init I2C")
    i2c = I2C(1, scl='I2C_SCL', sda='I2C_SDA')
    boot_msg("Init BMA421")
    accel = BMA421(i2c)
    boot_msg("Init HRS3300")
    hrs = HRS3300(i2c)
    hrs.disable()
    boot_msg("Init touch")
    touch = TouchButton(Pin('TP_INT', Pin.IN),
                        Pin('TP_RST', Pin.OUT, value=0), _callback)
    boot_msg("Init motor")
    vibrator = Vibrator(Pin('MOTOR', Pin.OUT, value=0), active_low=True)

    # Mount the filesystem
    boot_msg("Init SPINOR")
    flash = FLASH(spi, (Pin('NOR_CS', Pin.OUT, value=1),))
    try:
        boot_msg("Mount FS")
        os.mount(flash, '/flash')
    except (AttributeError, OSError) as e:
        # Format the filesystem (and provide a default version of main.py)
        boot_msg("Format FS")
        os.VfsLfs2.mkfs(flash)
        boot_msg("Retry mount FS")
        os.mount(flash,'/flash')
        boot_msg("Write main.py")
        with open('/flash/main.py', 'w') as f:
            f.write('''\
#include('main.py')
''')

    # Only change directory if the button is not pressed (this will
    # allow us access to fix any problems with main.py)!
    if not safe_mode:
        boot_msg("Enter /flash")
        os.chdir('/flash')
        boot_msg("main.py")
    else:
        boot_msg("Safe mode")
except:
    drawable.string("FAILED", 0, 136, width=240)
backlight.set(2)

gc.collect()
free = gc.mem_free()