from pyleds.lib.Config import Config
from pyleds.lib.LoopSwitch import LoopSwitch
from pyleds.lib.Regions import Regions
from pyleds.lib.Tempo import Tempo


class Litsimaja(object):
    def __init__(self):
        self._config = Config()
        if self.conf('USE_EMULATOR'):
            module = __import__('lib.strip.TkinterStrip', None, None, ['TkinterStrip'])
            class_name = 'TkinterStrip'
        else:
            module = __import__('rpi_ws281x', None, None, ['PixelStrip'])
            class_name = 'PixelStrip'

        loaded_class = getattr(module, class_name)
        self._strip = loaded_class(
            self.conf('STRIP_PIXELS'), self.conf('STRIP_GPIO_PIN'), self.conf('STRIP_HZ'), self.conf('STRIP_DMA'),
            self.conf('STRIP_INVERT'), self.conf('STRIP_BRIGHTNESS'), self.conf('STRIP_CHANNEL'),
            self.conf('STRIP_TYPE')
        )
        self._loops = []
        self._strip.begin()
        self._regions: Regions = Regions(self.count_pixels(), self.conf('REGIONS'))
        self._tempo: Tempo = Tempo(self.conf('BPM_DEFAULT'))
        self._selected_program = None

    def count_pixels(self) -> int:
        return self._strip.numPixels()

    def get_strip(self):
        return self._strip

    def set_pixel_color(self, n: int, color: int) -> None:
        if self._regions.is_pixel_enabled(n):
            self._strip.setPixelColor(n, color)
        else:
            self._strip.setPixelColor(n, 0)

    def show(self) -> None:
        self._strip.show()

    def add_loop(self, loop: LoopSwitch):
        self.clear_loops()
        self._loops.append(loop)

    def clear_loops(self):
        for loop in self._loops:
            loop.stop()
        self._loops.clear()

    def switch_region(self, region_id: int):
        self._regions.switch_region(region_id)

    def get_region_ids(self):
        return self._regions.list_region_ids()

    def build_status_array(self):
        data = {'success': True}
        features = {
            'program': self._selected_program,
            'tempo': {
                'bpm': self.get_tempo().get_bpm()
            },
        }
        regions = []
        for region_id in self._regions.list_region_ids():
            regions.append(self._regions.is_region_enabled(region_id))
        features['region'] = regions
        data['features'] = features
        return data

    def get_tempo(self):
        return self._tempo

    def set_selected_program(self, program_name: str):
        self._selected_program = program_name

    def conf(self, key: str):
        return self._config.get(key)