import time
from machine import Pin, PWM, ADC


BREAKOUT_GARDEN_I2C_PINS = {"sda": 4, "scl": 5}
PICO_EXPLORER_I2C_PINS = {"sda": 20, "scl": 21}


class Analog:
    def __init__(self, pin, amplifier_gain=1, resistor=0):
        self.gain = amplifier_gain
        self.resistor = resistor
        self.pin = ADC(pin)

    def read_voltage(self):
        return self.pin.read_u16() * 3.3 / 65535 / self.gain

    def read_current(self):
        if self.resistor > 0:
            return self.read_voltage() / self.resistor
        else:
            return self.read_voltage()


class Button:
    def __init__(self, button, invert=True, repeat_time=200, hold_time=1000):
        self.invert = invert
        self.repeat_time = repeat_time
        self.hold_time = hold_time
        self.pin = Pin(button, pull=Pin.PULL_UP if invert else Pin.PULL_DOWN)
        self.last_state = False
        self.pressed = False
        self.pressed_time = 0

    def read(self):
        current_time = time.ticks_ms()
        state = self.raw()
        changed = state != self.last_state
        self.last_state = state

        if changed:
            if state:
                self.pressed_time = current_time
                self.pressed = True
                self.last_time = current_time
                return True
            else:
                self.pressed_time = 0
                self.pressed = False
                self.last_time = 0

        if self.repeat_time == 0:
            return False

        if self.pressed:
            repeat_rate = self.repeat_time
            if self.hold_time > 0 and current_time - self.pressed_time > self.hold_time:
                repeat_rate /= 3
            if current_time - self.last_time > repeat_rate:
                self.last_time = current_time
                return True

        return False

    def raw(self):
        if self.invert:
            return not self.pin.value()
        else:
            return self.pin.value()


class RGBLED:
    def __init__(self, r, g, b, invert=True):
        self.invert = invert
        self.led_r = PWM(Pin(r))
        self.led_r.freq(1000)
        self.led_g = PWM(Pin(g))
        self.led_g.freq(1000)
        self.led_b = PWM(Pin(b))
        self.led_b.freq(1000)

    def set_rgb(self, r, g, b):
        if self.invert:
            r = 255 - r
            g = 255 - g
            b = 255 - b
        self.led_r.duty_u16(int((r * 65535) / 255))
        self.led_g.duty_u16(int((g * 65535) / 255))
        self.led_b.duty_u16(int((b * 65535) / 255))