import esphome.codegen as cg
import esphome.config_validation as cv
from esphome import pins
from esphome.components import sensor
from esphome.const import (
    CONF_ID,
    CONF_PIN,
    DEVICE_CLASS_EMPTY,
    UNIT_PERCENT,
    ICON_PERCENT,
)

duty_cycle_ns = cg.esphome_ns.namespace("duty_cycle")
DutyCycleSensor = duty_cycle_ns.class_(
    "DutyCycleSensor", sensor.Sensor, cg.PollingComponent
)

CONFIG_SCHEMA = (
    sensor.sensor_schema(UNIT_PERCENT, ICON_PERCENT, 1, DEVICE_CLASS_EMPTY)
    .extend(
        {
            cv.GenerateID(): cv.declare_id(DutyCycleSensor),
            cv.Required(CONF_PIN): cv.All(
                pins.internal_gpio_input_pin_schema, pins.validate_has_interrupt
            ),
        }
    )
    .extend(cv.polling_component_schema("60s"))
)


def to_code(config):
    var = cg.new_Pvariable(config[CONF_ID])
    yield cg.register_component(var, config)
    yield sensor.register_sensor(var, config)

    pin = yield cg.gpio_pin_expression(config[CONF_PIN])
    cg.add(var.set_pin(pin))