import esphome.codegen as cg
import esphome.config_validation as cv
from esphome import pins
from esphome.const import CONF_ID, CONF_NUMBER, CONF_INVERTED, CONF_DATA_PIN, CONF_CLOCK_PIN

DEPENDENCIES = []
MULTI_CONF = True

sn74hc595_ns = cg.esphome_ns.namespace('sn74hc595')

SN74HC595Component = sn74hc595_ns.class_('SN74HC595Component', cg.Component)
SN74HC595GPIOPin = sn74hc595_ns.class_('SN74HC595GPIOPin', cg.GPIOPin)

CONF_SN74HC595 = 'sn74hc595'
CONF_LATCH_PIN = 'latch_pin'
CONF_OE_PIN = 'oe_pin'
CONF_SR_COUNT = 'sr_count'
CONFIG_SCHEMA = cv.Schema({
    cv.Required(CONF_ID): cv.declare_id(SN74HC595Component),
    cv.Required(CONF_DATA_PIN): pins.gpio_output_pin_schema,
    cv.Required(CONF_CLOCK_PIN): pins.gpio_output_pin_schema,
    cv.Required(CONF_LATCH_PIN): pins.gpio_output_pin_schema,
    cv.Optional(CONF_OE_PIN): pins.gpio_output_pin_schema,
    cv.Optional(CONF_SR_COUNT, default=1): cv.int_range(1, 4)
}).extend(cv.COMPONENT_SCHEMA)


def to_code(config):
    var = cg.new_Pvariable(config[CONF_ID])
    yield cg.register_component(var, config)
    data_pin = yield cg.gpio_pin_expression(config[CONF_DATA_PIN])
    cg.add(var.set_data_pin(data_pin))
    clock_pin = yield cg.gpio_pin_expression(config[CONF_CLOCK_PIN])
    cg.add(var.set_clock_pin(clock_pin))
    latch_pin = yield cg.gpio_pin_expression(config[CONF_LATCH_PIN])
    cg.add(var.set_latch_pin(latch_pin))
    if CONF_OE_PIN in config:
        oe_pin = yield cg.gpio_pin_expression(config[CONF_OE_PIN])
        cg.add(var.set_oe_pin(oe_pin))
    cg.add(var.set_sr_count(config[CONF_SR_COUNT]))


SN74HC595_OUTPUT_PIN_SCHEMA = cv.Schema({
    cv.Required(CONF_SN74HC595): cv.use_id(SN74HC595Component),
    cv.Required(CONF_NUMBER): cv.int_,
    cv.Optional(CONF_INVERTED, default=False): cv.boolean,
})
SN74HC595_INPUT_PIN_SCHEMA = cv.Schema({})


@pins.PIN_SCHEMA_REGISTRY.register(CONF_SN74HC595,
                                   (SN74HC595_OUTPUT_PIN_SCHEMA, SN74HC595_INPUT_PIN_SCHEMA))
def sn74hc595_pin_to_code(config):
    parent = yield cg.get_variable(config[CONF_SN74HC595])
    yield SN74HC595GPIOPin.new(parent, config[CONF_NUMBER], config[CONF_INVERTED])