import voluptuous as vol

from esphomeyaml import pins
from esphomeyaml.components import stepper
import esphomeyaml.config_validation as cv
from esphomeyaml.const import CONF_DIR_PIN, CONF_ID, CONF_SLEEP_PIN, CONF_STEP_PIN
from esphomeyaml.helpers import App, Pvariable, add, gpio_output_pin_expression

A4988 = stepper.stepper_ns.A4988

PLATFORM_SCHEMA = stepper.STEPPER_PLATFORM_SCHEMA.extend({
    vol.Required(CONF_ID): cv.declare_variable_id(A4988),
    vol.Required(CONF_STEP_PIN): pins.gpio_output_pin_schema,
    vol.Required(CONF_DIR_PIN): pins.gpio_output_pin_schema,
    vol.Optional(CONF_SLEEP_PIN): pins.gpio_output_pin_schema,
})


def to_code(config):
    for step_pin in gpio_output_pin_expression(config[CONF_STEP_PIN]):
        yield
    for dir_pin in gpio_output_pin_expression(config[CONF_DIR_PIN]):
        yield
    rhs = App.make_a4988(step_pin, dir_pin)
    a4988 = Pvariable(config[CONF_ID], rhs)

    if CONF_SLEEP_PIN in config:
        for sleep_pin in gpio_output_pin_expression(config[CONF_SLEEP_PIN]):
            yield
        add(a4988.set_sleep_pin(sleep_pin))

    stepper.setup_stepper(a4988, config)


BUILD_FLAGS = '-DUSE_A4988'